WO2000003743A2 - Use of inhibitors of prenyltransferases for inhibiting fungal growth - Google Patents
Use of inhibitors of prenyltransferases for inhibiting fungal growth Download PDFInfo
- Publication number
- WO2000003743A2 WO2000003743A2 PCT/US1999/016146 US9916146W WO0003743A2 WO 2000003743 A2 WO2000003743 A2 WO 2000003743A2 US 9916146 W US9916146 W US 9916146W WO 0003743 A2 WO0003743 A2 WO 0003743A2
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- WIPO (PCT)
- Prior art keywords
- aryl
- lower alkyl
- compound
- independently
- occurrence
- Prior art date
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- LFSXCDWNBUNEEM-UHFFFAOYSA-N phthalazine Chemical compound C1=NN=CC2=CC=CC=C21 LFSXCDWNBUNEEM-UHFFFAOYSA-N 0.000 description 1
- 150000003053 piperidines Chemical class 0.000 description 1
- 230000003169 placental effect Effects 0.000 description 1
- 244000000003 plant pathogen Species 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 125000003367 polycyclic group Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 1
- 229920001592 potato starch Polymers 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 108010007439 proline transporter Proteins 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000011321 prophylaxis Methods 0.000 description 1
- 239000000473 propyl gallate Substances 0.000 description 1
- 235000010388 propyl gallate Nutrition 0.000 description 1
- 229940075579 propyl gallate Drugs 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 230000004952 protein activity Effects 0.000 description 1
- 238000000159 protein binding assay Methods 0.000 description 1
- 230000006916 protein interaction Effects 0.000 description 1
- 108060006633 protein kinase Proteins 0.000 description 1
- 230000004850 protein–protein interaction Effects 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- MIPIIUBODRNJIF-UHFFFAOYSA-N pyrazine pyrimidine Chemical compound C1=CN=CN=C1.C1=CN=CC=N1.C1=CN=CC=N1 MIPIIUBODRNJIF-UHFFFAOYSA-N 0.000 description 1
- HMIITAWYCKLAAP-UHFFFAOYSA-N pyrazolo[4,3-b]azepine Chemical compound C1=CC=CN=C2C=NN=C21 HMIITAWYCKLAAP-UHFFFAOYSA-N 0.000 description 1
- XYEVREOOMFVLLS-UHFFFAOYSA-N pyrazolo[4,3-c]diazepine Chemical compound C1=CC=NN=C2C=NN=C21 XYEVREOOMFVLLS-UHFFFAOYSA-N 0.000 description 1
- 239000002718 pyrimidine nucleoside Substances 0.000 description 1
- CTVOZUFKICZROL-UHFFFAOYSA-N pyrrolo[3,2-b]azepine Chemical compound C1=CC=CC2=NC=CC2=N1 CTVOZUFKICZROL-UHFFFAOYSA-N 0.000 description 1
- ZDJJKOOESFJHGL-UHFFFAOYSA-N pyrrolo[3,2-c]diazepine Chemical compound N1=CC=CC2=NC=CC2=N1 ZDJJKOOESFJHGL-UHFFFAOYSA-N 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000003340 retarding agent Substances 0.000 description 1
- 238000003757 reverse transcription PCR Methods 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 1
- 229960001860 salicylate Drugs 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 230000004799 sedative–hypnotic effect Effects 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229930004725 sesquiterpene Natural products 0.000 description 1
- 150000004354 sesquiterpene derivatives Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 description 1
- 210000001626 skin fibroblast Anatomy 0.000 description 1
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 1
- 229940100996 sodium bisulfate Drugs 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 229940001584 sodium metabisulfite Drugs 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 229940080313 sodium starch Drugs 0.000 description 1
- 229940001482 sodium sulfite Drugs 0.000 description 1
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 1
- 229910001495 sodium tetrafluoroborate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 235000010199 sorbic acid Nutrition 0.000 description 1
- 239000004334 sorbic acid Substances 0.000 description 1
- 229940075582 sorbic acid Drugs 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000012421 spiking Methods 0.000 description 1
- 230000028070 sporulation Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 238000012289 standard assay Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 235000011150 stannous chloride Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000008223 sterile water Substances 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
- 239000007929 subcutaneous injection Substances 0.000 description 1
- 125000005346 substituted cycloalkyl group Chemical group 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 1
- NVBFHJWHLNUMCV-UHFFFAOYSA-N sulfamide Chemical compound NS(N)(=O)=O NVBFHJWHLNUMCV-UHFFFAOYSA-N 0.000 description 1
- 125000003375 sulfoxide group Chemical group 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 150000008053 sultones Chemical class 0.000 description 1
- 238000003239 susceptibility assay Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- YMNBXYLOSIKZGL-MRVPVSSYSA-N tert-butyl n-[(2s)-3-methyl-1-oxobutan-2-yl]carbamate Chemical compound CC(C)[C@@H](C=O)NC(=O)OC(C)(C)C YMNBXYLOSIKZGL-MRVPVSSYSA-N 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- FPGGTKZVZWFYPV-UHFFFAOYSA-M tetrabutylammonium fluoride Chemical compound [F-].CCCC[N+](CCCC)(CCCC)CCCC FPGGTKZVZWFYPV-UHFFFAOYSA-M 0.000 description 1
- RAOIDOHSFRTOEL-UHFFFAOYSA-N tetrahydrothiophene Chemical compound C1CCSC1 RAOIDOHSFRTOEL-UHFFFAOYSA-N 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000004797 therapeutic response Effects 0.000 description 1
- GVIJJXMXTUZIOD-UHFFFAOYSA-N thianthrene Chemical compound C1=CC=C2SC3=CC=CC=C3SC2=C1 GVIJJXMXTUZIOD-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- DUYAAUVXQSMXQP-UHFFFAOYSA-M thioacetate Chemical compound CC([S-])=O DUYAAUVXQSMXQP-UHFFFAOYSA-M 0.000 description 1
- 125000004001 thioalkyl group Chemical group 0.000 description 1
- HNKJADCVZUBCPG-UHFFFAOYSA-N thioanisole Chemical compound CSC1=CC=CC=C1 HNKJADCVZUBCPG-UHFFFAOYSA-N 0.000 description 1
- 150000003566 thiocarboxylic acids Chemical class 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 125000004055 thiomethyl group Chemical group [H]SC([H])([H])* 0.000 description 1
- AXZWODMDQAVCJE-UHFFFAOYSA-L tin(II) chloride (anhydrous) Chemical compound [Cl-].[Cl-].[Sn+2] AXZWODMDQAVCJE-UHFFFAOYSA-L 0.000 description 1
- AOBORMOPSGHCAX-DGHZZKTQSA-N tocofersolan Chemical compound OCCOC(=O)CCC(=O)OC1=C(C)C(C)=C2O[C@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C AOBORMOPSGHCAX-DGHZZKTQSA-N 0.000 description 1
- 229960000984 tocofersolan Drugs 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 238000011200 topical administration Methods 0.000 description 1
- 231100000816 toxic dose Toxicity 0.000 description 1
- 230000002103 transcriptional effect Effects 0.000 description 1
- 239000003558 transferase inhibitor Substances 0.000 description 1
- 238000005820 transferase reaction Methods 0.000 description 1
- 238000002054 transplantation Methods 0.000 description 1
- COIOYMYWGDAQPM-UHFFFAOYSA-N tri(ortho-tolyl)phosphine Substances CC1=CC=CC=C1P(C=1C(=CC=CC=1)C)C1=CC=CC=C1C COIOYMYWGDAQPM-UHFFFAOYSA-N 0.000 description 1
- 125000004044 trifluoroacetyl group Chemical group FC(C(=O)*)(F)F 0.000 description 1
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 description 1
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 1
- UCPYLLCMEDAXFR-UHFFFAOYSA-N triphosgene Chemical compound ClC(Cl)(Cl)OC(=O)OC(Cl)(Cl)Cl UCPYLLCMEDAXFR-UHFFFAOYSA-N 0.000 description 1
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
- 229940070710 valerate Drugs 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 235000019871 vegetable fat Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 231100000747 viability assay Toxicity 0.000 description 1
- 238000003026 viability measurement method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- 239000002076 α-tocopherol Substances 0.000 description 1
- 235000004835 α-tocopherol Nutrition 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/005—Enzyme inhibitors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/10—Antimycotics
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
- C07C323/23—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and nitrogen atoms, not being part of nitro or nitroso groups, bound to the same carbon skeleton
- C07C323/24—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and nitrogen atoms, not being part of nitro or nitroso groups, bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
- C07C323/25—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and nitrogen atoms, not being part of nitro or nitroso groups, bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
- C07C323/23—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and nitrogen atoms, not being part of nitro or nitroso groups, bound to the same carbon skeleton
- C07C323/39—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and nitrogen atoms, not being part of nitro or nitroso groups, bound to the same carbon skeleton at least one of the nitrogen atoms being part of any of the groups, X being a hetero atom, Y being any atom
- C07C323/40—Y being a hydrogen or a carbon atom
- C07C323/42—Y being a carbon atom of a six-membered aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
- C07C323/50—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton
- C07C323/51—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
- C07C323/57—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups
- C07C323/58—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups with amino groups bound to the carbon skeleton
- C07C323/59—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups with amino groups bound to the carbon skeleton with acylated amino groups bound to the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
- C07D417/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/02—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing at least one abnormal peptide link
- C07K5/0205—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing at least one abnormal peptide link containing the structure -NH-(X)3-C(=0)-, e.g. statine or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
- C07K5/06—Dipeptides
- C07K5/06008—Dipeptides with the first amino acid being neutral
- C07K5/06078—Dipeptides with the first amino acid being neutral and aromatic or cycloaliphatic
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
- C07K5/10—Tetrapeptides
- C07K5/1002—Tetrapeptides with the first amino acid being neutral
- C07K5/1005—Tetrapeptides with the first amino acid being neutral and aliphatic
- C07K5/1013—Tetrapeptides with the first amino acid being neutral and aliphatic the side chain containing O or S as heteroatoms, e.g. Cys, Ser
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/02—Systems containing only non-condensed rings with a three-membered ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2603/00—Systems containing at least three condensed rings
- C07C2603/02—Ortho- or ortho- and peri-condensed systems
- C07C2603/04—Ortho- or ortho- and peri-condensed systems containing three rings
- C07C2603/06—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members
- C07C2603/10—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings
- C07C2603/12—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings only one five-membered ring
- C07C2603/20—Acenaphthenes; Hydrogenated acenaphthenes
Definitions
- Fungal infections of humans range from superficial conditions, usually caused by dermatophytes or Candida species, that affect the skin (such as dermatophytoses) to deeply invasive and often lethal infections (such as candidiasis and cryptococcosis) Pathogenic fungi occur worldwide, although particular species may predominate in certain geographic areas
- lethal infections such as candidiasis and cryptococcosis
- Pathogenic fungi occur worldwide, although particular species may predominate in certain geographic areas
- the incidence of fungal infections has increased dramatically, as have the numbers of potentially invasive species
- fungal infections once dismissed as a nuisance, have begun to spread so -widely that they are becoming a major concern in hospitals and health departments
- Fungal infections occur more frequently in people whose immune system is compromised or suppressed (e g , because of organ transplantation, cancer chemotherapy, or the human immunodeficiency virus), who have been treated with broad-spectrum antibacterial agents, or who have been subject to invasive procedures (catheters and prosthetic devices, for example)
- the fungi responsible for life-threatening infections include Candida species
- Candida albicans mainly Candida albicans, followed by Candida tropicalis
- Aspergillus species mainly Candida albicans, followed by Candida tropicalis
- Q ⁇ ptococcus neoformans mainly Candida albicans, followed by Candida tropicalis
- Histoplasma capsiilatum mainly Candida albicans, followed by Candida tropicalis
- Q ⁇ ptococcus neoformans mainly Histoplasma capsiilatum
- Coccidioides immitis mainly Candida albicans, followed by Candida tropicalis
- Q ⁇ ptococcus neoformans mainly Histoplasma capsiilatum
- Coccidioides immitis mainly Candida albicans, followed by Candida tropicalis
- the fungal cell wall is a structure that is both essential for the fungus and absent from mammalian cells, and consequently may be an ideal target for antifungal agents
- Inhibitors of the biosynthesis of two important cell wall components, glucan and chitin already exist
- Polyoxins and the structurally related nikkomycins both consist of a pyrimidine nucleoside linked to a peptide moiety
- inhibit chitin synthase competitively, presumably acting as analogs of the substrate undine d ⁇ hosphate (UDP)-N-acetylglucosam ⁇ ne (chitin is an N-acetylglucosamine homopolymer), causing inhibition of septation and osmotic lysis
- UDP undine d ⁇ hosphate
- chitin is an N-acetylglucosamine homopolymer
- the target of polyoxins and nikkomycins is in the inner leaflet of the plasma membrane, they are
- glucans are the major components that strengthen the cell wall
- the glucosyl units within these glucans are arranged as long coiling chains of ⁇ -(l,3)-
- ⁇ -(l,3)-glucan is produced by a synthase composed of at least two subunits (Tkacz, J S (1992) In Emerging Targets in Antibacterial 15 and Antifungal Chemotherapy Sutcliffe and Georgopapadakou, Eds , pp495-523, Chapman & Hall, and Kang et al (1986) PNAS 83.5808-5812)
- One subunit is localized to the plasma membrane and is thought to be the catalytic subunit, while the second subunit binds GTP and associates with and activates the catalytic subunit (Mol et al. ( 1994) J Biol Chem 269 31267-31274)
- Covalent modification by isoprenoid lipids contributes to membrane interactions and biological activities of a rapidly expanding group of 30 proteins (see, for example, Maltese (1990) FASEB J 4 3319, and Glomset et al. (1990) Trends Biochem Sci 15 139)
- Either farnesyl (15-carbon) or geranylgeranyl (20-carbon) isoprenoids can be attached to specific proteins, with geranylgeranyl being the predominant isoprenoid found on proteins (Farnsworth et al.
- FPTase and GGPTase-I are ⁇ / ⁇ heterodimeric enzymes that share a common ⁇ subunit; the ⁇ subunits are distinct but share approximately 30% amino acid similarity (Brown et al. (1993). Nature 366: 14-15; Zhang et al. (1994). J. Biol. Chem. 269:3175-3180).
- GGPTase II has different ⁇ and ⁇ subunits and complexes with a third component (REP, Rab Escort Protein) that presents the protein substrate to the ⁇ / ⁇ catalytic subunits.
- Each of these enzymes selectively uses farnesyl diphosphate or geranylgeranyl diphosphate as the isoprenoid donor and selectively recognizes the protein substrate.
- FPTase farnesylates CaaX-containing proteins that end with Ser, Met, Cys, Gin or Ala.
- CaaX tetrapeptides comprise the minimum region required for interaction of the protein substrate with the enzyme.
- GGPTase-II modifies XXCC and XCXC proteins, while the interaction between GGPTase-II and ixs protein substrates is more complex, requiring protein sequences in addition to the C-terminal amino acids for recognition.
- the enzymological characterization of these three enzymes has demonstrated that it is possible to selectively inhibit one with little inhibitory effect on the others (Moores et al. (1991) J. Biol. Chem. 266: 17438).
- GGPTase I transfers the prenyl group from geranylgeranyl diphosphate to the sulphur atom in the Cys residue within the CAAX sequence.
- S. cerevisiae proteins such as the Ras superfamily proteins Rhol, Rho2, Rsrl/Budl and Cdc42 appear to be GGPTase substrates (Madaule et al. (1987) PNAS 84:779-783; Bender et al.
- the cell wall of many fungi is required to maintain cell shape and integrity.
- the main structural component responsible for the rigidity of the yeast cell wall is 1,3- ⁇ -linked glucan polymers with some branches through 1,6- ⁇ - linkages.
- the biochemistry of the yeast enzyme catalyzing the synthesis of 1,3- ⁇ - glucan chains has been studied extensively, but little was previously known at the molecular level about the genes encoding subunits of this enzyme. Only a pair of closely related proteins (Gscl/Fksl and Gsc2/Fks2) had previously been described as subunits of the 1,3- ⁇ -glucan synthase (GS) (Inoue et al. (1995) supra; and Douglas et al.
- GS activity in many fungal species requires GTP or a non-hydrolyzable analog (e.g. GTP ⁇ S) as a cofactor, suggesting that a GTP-binding protein stimulates this enzyme (Mol et al. ( 1994) J. Biol. Chem. 269:31267).
- GTP ⁇ S non-hydrolyzable analog
- the present invention relates to methods for treating or preventing fungal infections and infections involving other eukaryotic parasites of plants or animals, using compounds that specifically inhibit the biological activity of the enzyme geranylgeranylproteintransferase (GGPTase) .
- GGPTase geranylgeranylproteintransferase
- the subject GGPTase inhibitors can be used for the treatment of mycotic infections in animals; as additives in feed for livestock to promote weight gain; as disinfectant formulations; and as in agricultural applications to prevent or treat fungal infection of plants.
- the practice of the subject method utilizes GGPTase inhibitors which are selective inhibitors of the fungal or parasites' GGTase relative to human GGTase or FPTase.
- the method can be used for treating a nosocomial fungal and skin/wound infection involving fungal organisms, including, among others, the species Aspergilhts, B/astomyces, Candida, Coccidioides, Cryptococciis, Epidermophyton, Hendersonula, Histoplasma, Microsporum, Paecilomyces, Paracoccidioides, Pneumocystis, Trichophyton, and Trichosporhim .
- the method can be used for treating an animal or plant parasites, such as infections involving liver flukes, nematodes or the like.
- treatment of such infections comprises the administration of a pharmaceutical composition of the invention in a therapeutically effective amount to an individual in need of such treatment.
- the compositions may be administered parenterally by intramuscular, intravenous, intraocular, intraperitoneal, or subcutaneous routes; inhalation; orally, topically and intranasally.
- Figures 1-56 illustrate various reaction schemes for synthesizing prenyltransferase inhibitors useful in the methods and compositions of the present invention.
- Figure 57 shows a gel which illustrates the effect of compound 99a on localisation of MycCaRHOl
- Figure 58 is a graph demonstrating that a fungal GGTase inhibitor increases animal survival.
- Figures 59-62 are tables presenting test results for prenyltransferase inhibitors useful in the methods and compositions of the present invention.
- data are for compounds tested at 100 mg/L and are expressed as percent inhibition of area of growth of the untreated control.
- the present invention relates to methods for preventing fungal infections using compounds that specifically inhibit the biological activity of fungal enzymes involved in cell wall integrity, hyphae formation, and other cellular functions critical to pathogenesis.
- prenylation of Rhol - like phosphatases by a geranylgeranylproteintransferase (GGPTase) activity can be critical to maintenance of cell wall integrity in yeast.
- GGPTase geranylgeranylproteintransferase
- prenylation of, inter alia, Rhol -like GTPase(s) is required for sufficient glucan synthase activity.
- GGPTase I prenylation of Rhol by GGPTase I is not only critical to cell growth, but inhibition of the prenylation reaction is a potential target for developing a cytotoxic agent for killing various fungi.
- the relatively high divergence between fungal and human GGPTase ⁇ - subunits suggests that selectivity for the fungal GGPTase activity can be obtained to provide antifungal agents having desirable therapeutic indices.
- the present invention demonstrates, for the first time, that small molecules which inhibit fungal geranylgeranylproteintransferase bioactivity can cause cell death, rather than quiescence or sporulation, when contacted with various microbial organisms.
- small molecules which inhibit fungal geranylgeranylproteintransferase bioactivity can cause cell death, rather than quiescence or sporulation, when contacted with various microbial organisms.
- the use of GGPTase inhibitors as described herein can result in cell lysis and thereby should ensure destruction of the pathogen.
- the use of, and need for anti-fungal agents is widespread and ranges from the treatment of mycotic infections in animals; to additives in feed for livestock to promote weight gain; to disinfectant formulations.
- the present invention provides methods and compositions for inhibiting fungal growth using small molecule (e.g., less than about 2000 amu, or preferably less than about 1000 amu) inhibitors of fungal GGPTase.
- the GGPTase inhibitors can be, among others: peptidomimetics, such as those described below which mimic the geranylgeranyl substrate sequence of, for example, a Rhol -like phosphatase; acyclic terpenes such as a geranylgeranyl analog; or other small organic molecules which inhibit a target fungal GGPTase activity.
- the preferred inhibitors whether peptoid or non-peptidyl, inhibit a targeted fungal GGPTase with a K j of 10 ⁇ M or less, more preferably 1 ⁇ M or less, and even more preferably with a K j less than 100 nM, 10 nM or even 1 nM.
- the subject method preferably employs GGPTase inhibitors which are selective for the fungal enzyme relative to the host animals' GGPTase enzyme(s), e.g., the Kj for inhibition of the fungal enzyme is at least one order of magnitude less than the K j for inhibition of GGPTase from the human (or other animal), and even more preferably at least two, three or even four orders of magnitude less
- the preferred inhibitors whether peptoid or non- peptidyl, inhibit a targeted fungal GGPTase with an IC5 of 10 ⁇ M or less, more preferably 1 ⁇ M or less, and even more preferably with an IC ;o less than 100 nM, 10 nM or even 1 nM.
- the subject method preferably employs GGPTase inhibitors which are selective for the fungal enzyme relative to the host animals' GGPTase enzyme(s), e.g., the IC50 for inhibition of the fungal enzyme is at least one order of magnitude less than the IC50 for inhibition of GGPTase from the human (or other animal), and even more preferably at least two, three or even four orders of magnitude less. That is, in preferred embodiments, the practice of the subject method in vivo in animals utilizes GGPTase inhibitors with therapeutic indexes of at least 10, and more preferably at least 100 or 1000.
- the antifungal properties of the compounds of the present invention may be determined from a fungal lysis assay, as well as by other methods, including, inter alia, growth inhibition assays, fluorescence-based fungal viability assays, flow cytometry analyses, and other standard assays known to those skilled in the an.
- the assays for growth inhibition of a microbial target can be used to derive an
- ED 50 value for the compound that is, the concentration of compound required to kill
- Preferred antifungal agent pharmaceutical preparation would provide a dose less than the ED 50 for modulation of FPTase and/or GGPTase activity in the host (mammal), more preferably at least 1 order of magnitude less, more preferably at least 2, 3 or 4 orders of magnitude less.
- growth inhibition by an antifungal compound of the invention may also be characterized in terms of the minimum inhibitory concentration (MIC),
- cytolysis of a fungal population by an antifungal compound can also be characterized, as described above by the minimum inhibitory 0 concentration, which is the concentration required to reduce the viable fungal population by 99.9%.
- the value of MIC 50 defined as the concentration of a compound required to reduce the viable fungal population by 50%, can also be used.
- the compounds of the present invention are selected for use based, inter alia, on having MIC 50 values of less than 25 ⁇ g/mL, more preferably
- Another parameter useful in identifying and measuring the effectiveness of the antifungal compounds of the invention is the determination of the kinetics of the antifungal activity of a compound. Such a determination can be made by determining 0 antifungal activity as a function of time.
- the compounds display kinetics which result in efficient lysis of a fungal cell.
- the compounds are fungicidal.
- the preferred antifungal compounds of the invention display selective toxicity to target microorganisms and minimal toxicity to mammalian cells.
- Determination of the toxic dose can be carried out using protocols well known in the field of pharmacology. Ascertaining the effect of a compound of the invention on mammalian cells is preferably performed using tissue culture assays, e.g., the present compounds can be evaluated according to standard methods known to those skilled in that art (see for example Gootz, T. D. (1990) Clin. Microbiol. Rev.
- such assay methods include, inter alia, trypan blue exclusion and MTT assays (Moore et al. (1994) Compound Research 7:265-269).
- a specific cell type may release a specific metabolite upon changes in membrane permeability, that specific metabolite may be assayed, e.g., the release of hemoglobin upon the lysis of red blood cells (Srinivas et al. (1992) J. Biol. Chem.
- the compounds of the invention are preferably tested against primary cells, e.g., using human skin fibroblasts (HSF) or fetal equine kidney (FEK) cell cultures, or other primary cell cultures routinely used by those skilled in the art. Permanent cell lines may also be used, e.g., Jurkat cells.
- the subject compounds are selected for use in animals, or animal cell/tissue culture based at least in part on having LD 50 's at least one order of magnitude greater than the MIC 5 o or ED 50 as the case may be, and even more preferably at least two, three and even four orders of magnitude greater. That is, in preferred embodiments where the subject compounds are to be administered to an animal, a suitable therapeutic index is preferably greater than 10. and more preferably greater than 100, 1000 or even 10,000.
- the invention is also directed to methods for treating a microbial infection in a host using the compositions of the invention.
- the compounds provided in the subject methods exhibit broad antifungal activity against various fungi and can be used as agents for treatment and prophylaxis of fungal infectious diseases.
- the subject method can be used to treat or prevent nosocomial fungal and skin/wound infection involving fungal organisms, including, among others, the species Aspergillus, Blastomyces. Candida, Coccidioides, Cryptococciis, Epidermophyton, Hendersonula, Histoplasma, Microsp ⁇ rum, Paecilomyces, Paracoccidioides. Pneumocystis, Trichophyton, and Trichosporium.
- treatment of such fungal infections comprises the administration of a pharmaceutical composition of the invention in a therapeutically effective amount to an individual in need of such treatment.
- the compositions may be administered parenterally by intramuscular, intravenous, intraocular, intraperitoneal, or subcutaneous routes; inhalation; orally, topically and intranasally.
- the subject antifungal methods may be used to treat plants infected with fungi such as Venturia inaeqaalis, Mycosphaerella musicola, Pyricularia oryzae, Cercospora sp., Rhizoctonia solani, Fusarhim sp., Sclerotinia homoeocarpa, Phytophthora infestans, Puccinia sp., and Erysiphe graminis. Any method of treatment known in the art, including foliage sprays and soil treatment, may be employed in this embodiment.
- fungi such as Venturia inaeqaalis, Mycosphaerella musicola, Pyricularia oryzae, Cercospora sp., Rhizoctonia solani, Fusarhim sp., Sclerotinia homoeocarpa, Phytophthora infestans, Puccinia sp., and Erysiphe graminis. Any method
- the subject antifungal methods of the invention are also particularly useful in inhibiting unwanted fungal growth in tissue culture, especially those used for production of recombinant proteins or vectors for use in gene therapy.
- the invention is also directed to pharmaceutical compositions containing one or more of the antimicrobial compounds of the invention as the active ingredient which may be administered to a host animal
- abnormal proliferation and “unwanted proliferation” are interchangeable and refer to proliferation of cells which is undesired, e.g., such as may arise due to transformation and/or immortalization of the cells, e.g., neoplastic or hyperplastic.
- fungi and "yeast” are used interchangeably herein and refer to the art recognized group of eukaryotic protists known as fungi. That is, unless clear from the context, "yeast” as used herein can encompass the two basic morphologic forms of yeast and mold and dimorphisms thereof.
- antimicrobial refers to the ability of the inhibitors of the invention to prevent, inhibit or destroy the growth of microbes such as bacteria, fungi, protozoa and viruses.
- prodrug is intended to encompass compounds which, under physiological conditions, are converted into the inhibitor agents of the present invention.
- a common method for making a prodrug is to select moieties which are hydrolyzed under physiological conditions to provide the desired biologically active drug.
- the prodrug is converted by an enzymatic activity of the patient or alternatively of a target fungi.
- ED 5 o means the dose of a drug which produces 50% of its maximum response or effect. Alternatively, it may refer to the dose which produces a pre-determined response in 50% of test subjects or preparations.
- LD 50 means the dose of a drug which is lethal in 50% of test subjects.
- therapeutic index refers to the therapeutic index of a drug defined as LD 50 /ED 50 .
- structure-activity relationship' or "SAR " ' refers to the way in which altering the molecular structure of drugs alters their interaction with a receptor, enzyme, etc.
- heteroatom as used herein means an atom of any element other than carbon or hydrogen. Preferred heteroatoms are boron, nitrogen, oxygen, phosphorus, sulfur and selenium.
- aliphatic group refers to a straight-chain, branched-chain, or cyclic aliphatic hydrocarbon group and includes saturated and unsaturated aliphatic groups, such as an alkyl group, an alkenyl group, and an alkynyl group.
- alkyl refers to the radical of saturated aliphatic groups, including straight-chain alkyl groups, branched-chain alkyl groups, cycloalkyl (alicyclic) groups, alkyl substituted cycloalkyl groups, and cycloalkyl substituted alkyl groups.
- a straight chain or branched chain alkyl has 30 or fewer carbon atoms in its backbone (e.g., C ⁇ -C 30 for straight chain, C 3 -C 30 for branched chain), and more preferably 20 or fewer.
- preferred cycloalkyls have from 3-10 carbon atoms in their ring structure, and more preferably have 5, 6 or 7 carbons in the ring structure.
- alkyl (or “lower alkyl) as used throughout the specification, examples, and claims is intended to include both “unsubstituted aikyls” and “substituted aikyls”, the latter of which refers to alkyl moieties having substituents replacing a hydrogen on one or more carbons of the hydrocarbon backbone.
- Such substituents can include, for example, a halogen, a hydroxyl, a carbonyl (such as a carboxyl, an alkoxycarbonyl, a formyl, or an acyl), a thiocarbonyl (such as a thioester, a thioacetate, or a thioformate), an alkoxyl, a phosphoryl, a phosphonate, a phosphinate, an amino, an amido, an amidine, an imine, a cyano, a nitro, an azido, a sulfhydryl, an alkylthio, a sulfate, a sulfonate, a sulfamoyl, a sulfonamido, a sulfonyl, a heterocyclyl, an aralkyl, or an aromatic or hetero aromatic moiety.
- a halogen such as a hydroxyl,
- the moieties substituted on the hydrocarbon chain can themselves be substituted, if appropriate.
- the substituents of a substituted alkyl may include substituted and unsubstituted forms of amino, azido, imino, amido, phosphoryl (including phosphonate and phosphinate), sulfonyl (including sulfate, sulfonamido, sulfamoyl and sulfonate), and silyl groups, as well as ethers, alkylthios, carbonyls (including ketones, aldehydes, carboxylates, and esters), -CF 3 , -CN and the like.
- Cycloalkyls can be further substituted with aikyls, alkenyls, alkoxys, alkylthios, alkylaminos, carbonyl-substituted aikyls, -CF 3 , -CN, and the like.
- aralkyl refers to an alkyl group substituted with an aryl group (e.g., an aromatic or heteroaromatic group).
- alkenyl and alkynyl refer to unsaturated aliphatic groups analogous in length and possible substitution to the aikyls described above, but that contain at least one double or triple bond respectively.
- alkenyl and alkynyl will preferably refer to lower alkenyl and lower alkynyl groups, respectively.
- lower alkyl as used herein means an alkyl group, as defined above, but having from one to ten carbons, more preferably from one to six carbon atoms in its backbone structure. Likewise, “lower alkenyl” and “lower alkynyl” have similar chain lengths. Throughout the application, preferred alkyl groups are lower aikyls. In preferred embodiments, a substituent designated herein as alkyl is a lower alkyl.
- aryl as used herein includes 5 ⁇ , 6- and 7-membered single-ring aromatic groups that may include from zero to four heteroatoms, for example, benzene, pyrrole, furan, thiophene, imidazole, oxazole, thiazole, isoxazole, triazole, pyrazole. pyridine, pyrazine, pyridazine and pyrimidine, and the like. Those aryl groups having heteroatoms in the ring structure may also be referred to as “aryl heterocycles". "heteroaryls", or “heteroaromatics". The term “aryl” refers to both substituted and unsubstituted aromatic rings.
- the aromatic ring can be substituted at one or more ring positions with such substituents as described above, for example, halogen, azide, alkyl, aralkyl, alkenyl, alkynyl, cycloalkyl, hydroxyl, alkoxyl, amino, nitro, sulfhydryl, imino, amido, phosphonate, phosphinate, carbonyl, carboxyl, silyl, ether, alkylthio, sulfonyl, sulfonamido, ketone, aldehyde, ester, heterocyclyl, aromatic or heteroaromatic moieties, -CF 3 , -CN, or the like.
- substituents as described above, for example, halogen, azide, alkyl, aralkyl, alkenyl, alkynyl, cycloalkyl, hydroxyl, alkoxyl, amino, nitro, sulfhydryl, imino
- aryl also includes polycyclic ring systems having two or more cyclic rings in which two or more carbons are common to two adjoining rings (the rings are "fused rings") wherein at least one of the rings is aromatic, e.g., the other cyclic rings can be cycloalkyls, cycloalkenyls, cycloalkynyls, aryls and/or heterocyclyls.
- Me, Et, Ph, Tf, Nf, Ts, and Ms represent methyl, ethyl, phenyl, trifluoromethanesulfonyl, nonafluorobutanesulfonyl, /?-toluenesulfonyl, and methanesulfonyl, respectively.
- a more comprehensive list of the abbreviations utilized by organic chemists of ordinary skill in the art appears in the first issue of each volume of the Journal of Organic Chemisti) , this list is typically presented in a table entitled Standard List of Abbreviations The abbreviations contained in said list, and all abbreviations utilized by organic chemists of ordinary skill in the art are hereby incorporated by reference
- heterocyclyl refers to 4- to 10-membered ring structures, more preferably 3- to 7-membered rings, whose ring structures include one to four heteroatoms Heterocycles can also be polycycles Heterocyclyl groups include for example, thiophene, thianthrene, furan, pyran, lsobenzo uran, chromene, xanthene phenoxathin, pyrrole, imidazole, pyrazole, isothiazole, isoxazole, pyridine, pyrazine pyrimidine, pyridazine, indolizine, isoindole, indole, indazole, pu ⁇ ne, qumolizine, isoqumoline, hydantoin, oxazolme, lmidazolinetrione, triazohnone, quinoline, phthalazine, naphthy ⁇ dine
- polycyclyl or “polycychc group” refer to two or more rings e g , cycloalkyls, cycloalkenyls, cycloalkynyls aryls and/or heterocyclyls) in which two or more carbons are common to two adjoining rings, e g , the rings are "fused rings” Rings that are joined through non-adjacent atoms are termed "bridged" rings
- Each of the ⁇ ngs of the polycycle can be substituted with such substituents as described above, as for example, halogen, alkyl, aralkyl, alkenyl, alkynyl, cycloalkyl, hydroxyl, ammo, nitro, sulfhydryl, imino, amido, phosphonate, phosphinate, carbonyl, carboxyl, silyl, ether, alkylthio, sulfonyl, ketone, aldehy
- fused ring refers to a cyclic moiety which can comprise from 4 to 8 atoms in its ring structure, and can also be substituted or unsubstituted, (e.g., cycloalkyl, a cycloalkenyl, an aryl, or a heterocyclic ring) that shares a pair of carbon atoms with another ring.
- substituted or unsubstituted e.g., cycloalkyl, a cycloalkenyl, an aryl, or a heterocyclic ring
- the fused ring system can be a benzodiazepine, a benzoazepine, a pyrrolodiazepine, a pyrroloazepine, a furanodiazepine, a furanoazepine, a thiophenodiazepine, a thiophenoazepine, an imidazolodiazepine, an imidazoloazepine, an oxazolodiazepine, an oxazoloazepine, a thiazolodiazepine, a thiazoloazepine, a pyrazolodiazepine, a pyrazoloazepine, a pyrazinodiazepine, a pyrazinoazepine, a pyridinodiazepine, a pyridinoazepine, a pyrimidinodiaze
- nitro means -NO2; the term “halogen” designates - F, -Cl, -Br or -I; the term “sulfhydryl” means -SH; the term “hydroxyl” means -OH; and the term “sulfonyl” means -SO2-.
- amine and “amino” are art-recognized and refer to both unsubstituted and substituted amines, e.g., a moiety that can be represented by the general formula: p *
- R9, Rio and R'I Q each independently represent a hydrogen, an alkyl, an alkenyl, -(CH 2 ) m -R80 > or R-9 arj d ⁇ 10 taken together with the N atom to which they are attached complete a heterocycle having from 4 to 8 atoms in the ring structure;
- R 80 represents an aryl, a cycloalkyl, a cycloalkenyl, a heterocycle or a polycycle; and
- m is zero or an integer in the range of 1 to 8.
- R9 or Ri ⁇ can be a carbonyl, e.g., R9, Rio and the nitrogen together do not form an imide.
- R9 and R ⁇ 0 each independently represent a hydrogen, an alkyl, an alkenyl, or
- alkylamine as used herein means an amine group, as defined above, having a substituted or unsubstituted alkyl attached thereto, i.e., at least one of R 9 and R j n is an alkyl group. Positively charged amino groups with four hydrocarbon substituents are referred to as "ammonium" groups.
- acylamino is art-recognized and refers to a moiety that can be represented by the general formula:
- R9 is as defined above, and R'11 represents a hydrogen, an alkyl, an alkenyl or -(CH2) ⁇ rrR80 > where m and Rgn are as defined above.
- the term "amido" is art-recognized as an a ino-substituted carbonyl and includes a moiety that can be represented by the general formula:
- alkylthio refers to an alkyl group, as defined above, having a sulfur radical attached thereto.
- the "alkylthio" moiety is represented by one of -S-alkyl, -S-alkenyl, -S-alkynyl, and -S-(CH2) m -Rgo > wherein and Rgn are defined above.
- Representative alkylthio groups include methylthio, ethylthio, and the like.
- carbonyl is art-recognized and includes such moieties as can be represented by the general formula:
- X is a bond or represents an oxygen or a sulfur
- R j i represents a hydrogen, an alkyl, an alkenyl, -(CH2) m -R8o or a pharmaceutically acceptable salt
- R'11 represents a hydrogen, an alkyl, an alkenyl or -(CH 2 ) m -Rg ⁇
- m and R 80 are as defined above.
- X is an oxygen and R ⁇ or R' j i is not hydrogen
- the formula represents an "ester”.
- Rn j is as defined above, the moiety is referred to herein as a carboxyl group, and particularly when R is a hydrogen, the formula represents a "carboxylic acid".
- aldehyde where X is a bond, and Ri i is hydrogen, the above formula represents an "aldehyde” group.
- R j j where X is a bond, R j j is not hydrogen, and the carbonyl is bound to a hydrocarbon, the above formula represents a "ketone” group.
- R ⁇ is hydrogen, and the carbonyl is bound to a hydrocarbon, the above formula represents an "aldehyde” group.
- alkoxyl or “alkoxy” as used herein refer to an alkyl group, as defined above, having an oxygen radical attached thereto. Representative alkoxyl groups include methoxy, ethoxy, propyloxy, tert-butoxy and the like.
- an "ether” is two hydrocarbons covalently linked by an oxygen. Accordingly, the substituent of an alkyl that renders that alkyl an ether is or resembles an alkoxyl, such as can be represented by one of -O-alkyl, -O-alkenyl, -O-alkynyl, -O-(CH 2 ) m -Rgo, where m and Rgo are described above.
- sulfoxido refers to a moiety that can be represented by the general formula:
- R' j ⁇ is as defined above, but is not hydrogen.
- a “sulfone”, as used herein, refers to a moiety that can be represented by the general formula: O
- R' J J is as defined above, but is not hydrogen.
- a "phosphoryl” can in general be represented by the formula:
- OR 46 wherein Y represents O (or S, in the case of a thiophosphoryl), and R g represents hydrogen, a lower alkyl or an aryl.
- R g represents hydrogen, a lower alkyl or an aryl.
- Y represented S or O
- each R 46 independently represents hydrogen, a lower alkyl or an aryl
- Z represents O, S or N.
- Y is an S
- the phosphoryl moiety is a "phosphorothioate”.
- a "phosphoramidate” can be represented in the general formula: 0 I I 0 II z — P — 0 - z -P — OR 4 6
- R 9 and R ⁇ 0 are as defined above, and Z represents O, S or N.
- a “phosphonamidate” can be represented in the general formula:
- R 9 N (R 9 ) R 10 wherein R 9 and R ⁇ 0 are as defined above, and Z represents O, S.
- Analogous substitutions can be made to alkenyl and alkynyl groups to produce, for example, aminoalkenyls, aminoalkynyls, amidoalkenyls, amidoalkynyls, iminoalkenyls, iminoalkynyls, thioalkenyls, thioalkynyls, carbonyl-substituted alkenyls or alkynyls.
- the definition of each expression e.g., alkyl, m, n, etc., when it occurs more than once in any structure, is intended to be independent of its definition elsewhere in the same structure.
- Certain compounds of the present invention may exist in particular geometric or stereoisomeric forms.
- the present invention contemplates all such compounds, including cis- and trans-isomers, R- and S-enantiomers, diastereomers, (D)-isomers, (L)-isomers, the racemic mixtures thereof, and other mixtures thereof, as falling within the scope of the invention.
- Additional asymmetric carbon atoms may be present in a substituent such as an alkyl group. All such isomers, as well as mixtures thereof, are intended to be included in this invention.
- a particular enantiomer of a compound of the present invention may be prepared by asymmetric synthesis, or by derivatization with a chiral auxiliary, where the resulting diastereomeric mixture is separated and the auxiliary group cleaved to provide the pure desired enantiomers.
- the molecule contains a basic functional group, such as amino, or an acidic functional group, such as carboxyl
- diastereomeric salts are formed with an appropriate optically-active acid or base, followed by resolution of the diastereomers thus formed by fractional crystallization or chromatographic means well known in the art, and subsequent recovery of the pure enantiomers.
- Enantiomers may also be separated using a "chiral column", i.e., by performing chromatographically separating the enantiomers using chiral molecules bound to a solid support.
- Contemplated equivalents of the compounds described above include compounds which otherwise correspond thereto, and which have the same general properties thereof (e.g. the ability to inhibit fungal cell growth), wherein one or more simple variations of substituents are made which do not adversely affect the efficacy of the compound in inhibiting fungal cell growth.
- the compounds of the present invention may be prepared by the methods illustrated in the general reaction schemes as, for example, described below, or by modifications thereof, using readily available starting materials, reagents and conventional synthesis procedures. In these reactions, it is also possible to make use of variants which are in themselves known, but are not mentioned here.
- substitution or “substituted with” includes the implicit proviso that such substitution is in accordance with permitted valence of the substituted atom and the substituent, and that the substitution results in a stable compound, e.g., which does not spontaneously undergo transformation such as by rearrangement, cyclization, elimination, hydrolysis, etc.
- the term "substituted" is contemplated to include all permissible substituents of organic compounds.
- the permissible substituents include acyclic and cyclic, branched and unbranched, carbocyclic and heterocyclic, aromatic and nonaromatic substituents of organic compounds.
- Illustrative substituents include, for example, those described herein above.
- the permissible substituents can be one or more and the same or different for appropriate organic compounds.
- heteroatoms such as nitrogen may have hydrogen substituents and/or any permissible substituents of organic compounds described herein which satisfy the valences of the heteroatoms This invention is not intended to be limited in any manner by the permissible substituents of organic compounds.
- hydrocarbon is contemplated to include all permissible compounds having at least one hydrogen and one carbon atom.
- permissible hydrocarbons include acyclic and cyclic, branched and unbranched, carbocyclic and heterocyclic, aromatic and nonaromatic organic compounds which can be substituted or unsubstituted.
- amino acid residue and “peptide residue” is meant an amino acid or peptide molecule without the -OH of its carboxyl group (C-terminally linked)
- amino acid side chain is that part of an amino acid exclusive of the -CH(NH 2 )COOH portion, as defined by K. D. Kopple, "Peptides and Amino Acids", W A. Benjamin Inc., New York and Amsterdam, 1966, pages 2 and
- examples of such side chains of the common amino acids are -CH 2 CH 2 SCH 3 (the side chain of methionine), -CH(CH 3 )-CH 2 CH 3 (the side chain of isoleucine), - CH2CH(CH 3 ) 2 (the side chain of leucine) or H-(the side chain of glycine).
- amino acids used in the application of this invention are those naturally occurring amino acids found in proteins, or the naturally occurring amino acids
- amino acids which contain amino and carboxyl groups
- Particularly suitable amino acid side chains include side chains selected from those of the following amino acids, glycine, alanine, valine, cysteine, leucine, isoleucine, serine, threonine, methionine, glutamic acid, aspartic acid, glutamine, asparagine, lysine, arginine, proline, histidine, phenylalanine, tyrosine, and
- amino acid residue further includes analogs, derivatives and congeners of any specific amino acid referred to herein.
- the present invention contemplates the use of amino acid analogs wherein a side chain is lengthened or shortened while still providing a carboxyl, amino or other reactive
- the subject peptidomimetic can include an amino acid analog as for example, ⁇ -cyanoalanine, canavanine, djenkolic acid, norleucine, 3-phosphoserine, homoserine, dihydroxyphenylalanine, 5-hydroxytryptophan, 1 -methylhistidine, or 3-
- D and L stereoisomers of such amino acids when the structure of the amino acid admits of stereoisomeric forms.
- the configuration of the amino acids and amino acid residues herein are designated by the appropriate symbols D, L or DL, furthermore when the configuration is not designated the amino acid or residue can have the configuration D, L or DL.
- D, L or DL the structure of some of the compounds of this invention includes asymmetric carbon atoms.
- isomers arising from such asymmetry are included within the scope of this invention.
- Such isomers are obtained in substantially pure form by classical separation techniques and by sterically controlled synthesis and have arbitrarily been named, for example, as isomers #1 or #2.
- a named amino acid shall be construed to include both the D or L stereoisomers, preferably the L stereoisomer.
- protecting group means temporary substituents which protect a potentially reactive functional group from undesired chemical transformations. Examples of such protecting groups include esters of carboxylic acids, silyl ethers of alcohols, and acetals and ketals of aldehydes and ketones, respectively.
- the field of protecting group chemistry has been reviewed (Greene, T.W.; Wuts, P.G.M. Protective Groups in Organic Synthesis, 3 nd ed.; Wiley: New York, 1999; and Kocienski, P.J. Protecting Groups, Georg Thieme Verlag: New York, 1994).
- N-terminal protecting group or "amino-protecting group” as used herein refers to various amino-protecting groups which can be employed to protect the N-terminus of an amino acid or peptide against undesirable reactions during synthetic procedures.
- suitable groups include acyl protecting groups such as, to illustrate, formyl, dansyl, acetyl, benzoyl, trifluoroacetyl, succinyl and methoxysuccinyl; aromatic urethane protecting groups as, for example, carbonylbenzyloxy (Cbz); and aliphatic urethane protecting groups such as t- butyloxycarbonyl (Boc) or 9-Fluorenylmethoxycarbonyl (FMOC).
- acyl protecting groups such as, to illustrate, formyl, dansyl, acetyl, benzoyl, trifluoroacetyl, succinyl and methoxysuccinyl
- aromatic urethane protecting groups as, for example, carbon
- Peptidomimetics of the present invention which have sidechain or azepine ring substituents which include amino groups -such as where R 3 is a lysine or arginine, or where R 8 , R ⁇ , R 2 or Y comprise a free amino group- can optionally comprise suitable N-terminal protecting groups attached to the sidechains.
- C-terminal protecting group or “carboxyl-protecting group” as used herein refers to those groups intended to protect a carboxylic acid group, such as the C-terminus of an amino acid or peptide. Benzyl or other suitable esters or ethers are illustrative of C-terminal protecting groups known in the art.
- each expression e.g. lower alkyl, , n, p, etc., when it occurs more than once in any structure, is intended to be independent of its definition elsewhere in the same structure.
- the present invention makes available a novel method for inhibiting fungal cell growth by selectively inhibiting the activity of fungal geranylgeranyl transferases.
- the subject method can be practiced using a peptide or peptide-like inhibitor of the fungal GGPTase activity.
- a peptidyl inhibitor of a fungal GGPTase may be represented in the general formula I
- X a , X , and X c each, independently, represent O or H2;
- R represents
- R' represents H, a lower alkyl, a lower alkenyl, an aryl,
- R 7 represents an aryl, a cycloalkyl, a cycloalkenyl, or a heterocycle
- R j O represents a lower alkyl, lower alkenyl, lower alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthio alkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, and preferably is a sidechain of an alpha-amino acid residue or analog thereof, and even more preferably a straight chain , branched lower alkyl, aryl or arylalkyl;
- Ri j represents H, a carboxy-terminal blocking group, or a pharmaceutically acceptable salt, or
- R'j ! represents an alkyl, an alkenyl or -(CH2) m -R.7- R 4 g, independently for each occurrence, represents hydrogen, a lower alkyl or an aryl
- R70 independently for each occurrence, represents H, ; a lower alkyl, lower alkenyl, lower alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, and an alpha-carbon sidechain of an amino acid residue or analog or other amino-protecting group, or a pharmaceutically acceptable salt, or
- R 72 and R 73 independently for each occurrence, represents H, lower alkyl, aryl, heteroaryl, -(CH 2 ) m -R7 or the sidechain of an amino acid (e.g., a naturally occurring or unnatural amino acid);
- R o represents an hydrogen, a lower alkyl, a lower alkenyl, a lower alkynyl, or -(CH 2 ) m -R 7;
- X represents, independently for each occurrence, O or S;
- X 2 represents O or S ;
- m and n independently for each occurrence, represent zero or an integer in the range of 1 to 4.
- R represents a lower alkyl (e.g.,
- R represents
- the subject GGPTase inhibitors are peptidomimetics of the general formula C-A-A-X, wherein each A is, independently, an aliphatic amino acid,e.g., glycine, alanine, valine, leucine, isoleucine or an analog thereof, or A-A can represent a dipeptide equivalent spacer, C represents a cysteine or isosteric/isoelectronic equivalent thereof, and X represents any amino acid, but is preferably a leucine or phenylalamne or isosteric/isoelectronic equivalent thereof.
- the principal objectives in generating a peptidomimetic for use in the subject method is to increase the bioavailability of the compound and/or decrease the hydrolyzability of the peptidomimetic relative to the equivalent peptide.
- one class of compounds which are contemplated for use in the subject method are peptidomimetic inhibitors generated by replacing the A-A- X of the C-A-A-X tetrapeptide with a non-amino acid component while retaining the desired GGPTase inhibitory activity.
- cysteine residue can be replaced with an isosteric/isoelectronic equivalent, e.g., such as replacement of the sulfhydryl group with a polar moiety such as a cyano, nitro, thiocarbamate, amino, carbamic, phosphate, thiophosphate, sulfoxide, carboximide, urea, sulfone, phosphorothioate, phosphorodithioate, thiourea, dithiocarbamate, phosphoramidodi-thioate, methylsulfonyl, phosphonate, sulfamide, phosphoramide, sulfonate, dithiocarbonate, hydroxyl, sulfate, sulfmate, sulfamate, phosphinate, carboxylate, hydroxymate, imidazole or other heterocyclic moieties.
- a polar moiety such as a cyano, nitro, thi
- the sulfhydryl group can be functionalized, e.g., to form an S-alkyl cysteine or the corresponding sulfoxide, sulfone, sulfonate or sulfate derivatives thereof (though more preferably a sulfoxide or sulfone).
- the A-A-Leu tripeptide is replaced with a substituted aryl or heteroaryl group which corresponds essentially in size with the tripeptide.
- the subject method can be performed using a fungal GGPTase inhibitor that is represented in the general formula (II):
- Ar represents an aryl group (e.g., substituted or unsubstituted); J is absent (e.g., N and Ar are joined by a direct bond), or represents
- R represents
- 0 R' represents H, a lower alkyl, a lower alkenyl, an aryl,
- R 7 represents an aryl, a cycloalkyl, a cycloalkenyl, or a heterocycle
- R ] 0 represents a lower alkyl, lower alkenyl, lower alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, and preferably is an alpha-carbon sidechain of an amino acid residue or analog thereof, and even more preferably a straight chain , branched lower alkyl, aryl or arylalkyl;;
- R j j represents H, a carboxy-terminal blocking group, or a pharmaceutically acceptable salt, or
- R 0 and R u taken together form a 5-7 membered lactone;
- R'l 1 represents an alkyl, an alkenyl or -(CH 2 ) m -R 7
- R 6 independently for each occurrence, represents hydrogen, a lower alkyl or an aryl
- R 7 0, independently for each occurrence, represents H, a lower alkyl, lower alkenyl, lower alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, and an alpha-carbon sidechain of an amino acid residue or analog or other amino-protecting group, or a pharmaceutically acceptable salt or
- R 71 each independently represent H or lower alkyl
- R 72 independently for each occurrence, represents H, lower alkyl, aryl, heteroaryl or the sidechain of a naturally occurring amino acid
- R7 5 represents RIO or -Ar COOR 11 - Rgo represents an hydrogen, a lower alkyl, a lower alkenyl, a lower alkynyl, or -(CH 2 ) m -R 7:
- X represents, independently for each occurrence, O, S or H 2
- X 2 represents O or S; and m and n, independently for each occurrence, represent zero or an integer in the range of 1 to 4.
- the peptidomimetic can have a structure represented by formula Ilia or Illb:
- Ar, J, R', R7 0 , R7 1 and X are as defined above;
- R ⁇ represents a lower alkyl, lower alkenyl, lower alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, or an alpha-carbon sidechain of an amino acid residue or analog thereof, and is preferably a straight chain , branched lower alkyl, aryl or arylalkyl;
- R11 represents H, a carboxy-terminal blocking group, or a pharmaceutically acceptable salt, or
- RJO and R ⁇ 1 taken together in formula Ilia form a 5-7 membered lactone.
- Ar for each occurrence, refers to aryl group selected from the group consisting of 5-, 6- and 7-membered monocyclic or 10-14 membered bicyclic aromatic groups that may include from zero to four heteroatoms, as for example, benzene, pyrrole, furan, thiophene, imidazole, oxazole, thiazole, triazole, pyrazole, pyridine, pyrazine, pyridazine, pyrimidine, benzothiophene, quinoline, quinolone, and the like.
- Exemplary compounds of this class can be found with the generic structures described in, inter alia, U.S. Patent 5,705,686 and PCT publication WO96/21456, and the class includes compounds of the general formula IVb.
- X, R', Ru, and R 70 are as defined above in formula Hlb. and each R 82 is absent or represents one or more substitutions, each of which can independently be a lower alkyl, -(CH) 2 -R 7 or COOR ⁇ 1; (R 7 and R being defined above).
- the core aryl structure is a para-phenyl benzamide or meta- phenyl benzamide.
- the subject antifungal agent is a compound represented in the general formula:
- R, R70 , and R71 are as defined in formula II above, and
- R 30 ⁇ independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CH 2 ) n heteroaryl (e.g., substituted or unsubstituted),
- R 13 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroary! ;
- R 3 ⁇ 5 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryi, -(CH 2 ) n heteroaryl , -(CH 2 ) n CO 2 R 316 , -(CH 2 ) n CON(R 316 ) 2 or - (CH 2 ) n COR 3 17 ;
- R 316 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroaryl ;
- R 3 17 represents a naturally occurring amino acid, dipeptide, or tripeptide connected through an amide linkage;
- K represents -(CH 2 ) n , -(CH 2 ) n O, -(CH 2 ) n S, -(CH 2 )nNR i3;
- L represents (CH 2 ) n , alkenyl, alkynyl, (CH2) n alkenyl, (CH 2 )nalkynyl, (CH 2 )nO(CH 2 ) p , (CH 2 )nNR3i3(CH 2 )p, (CH 2 )nS(CH 2 )p, (CH2) n alkenyl(CH 2 ) p , (CH 2 )nalkynyl(CH 2 )p, O(CH 2 ) n , NR 3 o ⁇ (CH 2 ) n , S(CH 2 ) n ;
- any two R3 1 5 when occurring more than once in Q, can be taken together to form a 5 to 8 membered cycloalkyl, aryl, or heteroaryl ring; 50
- X 3 independently represents either N, O, or S
- X 4 independently represents either N, O, or S; and m represents 0 or an integer from 1-3; n, individually for each occurence, represents 0 or an integer from 1 to 5.
- the subject antifungal agent is a compound represented in the general formula'
- R, R 7Q , and R71 are as defined in formula II above, and
- Ar represents an aryl or heteroaryl group (substituted or unsubstituted)
- R 3 13 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroaryl ;
- R31 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroaryl , -(CH 2 ) n CO 2 R 3 ⁇ 6 , -(CH 2 ) n CON(R 316 ) 2 or - (CH 2 ) n COR 17 ;
- R 3 16 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroaryl ;
- R 3 17 represents a naturally occurring amino acid, dipeptide, or tripeptide connected through an amide linkage
- L represents (CH 2 ) n , alkenyl, alkynyl, (CH 2 ) n alkenyl, (CH 2 ) n alkynyl, (CH 2 )nO(CH 2 ) p , (CH 2 )nNR3i3(CH 2 ) p , (CH 2 ) n S(CH 2 ) p , (CH 2 ) n alkenyl(CH 2 ) p , (CH 2 ) n alkynyl(CH 2 )p, O(CH 2 ) n , NR 30 ⁇ (CH 2 ) n , S(CH 2 ) n ;
- any two R 3 i 5 when occurring more than once in Q, can be taken together to form a 5 to 8 membered cycloalkyl, aryl, or heteroaryl ring;
- R 70 is H; R is -SH or -S-lower alkyl, more preferably -SH; X is H 2 or O, more preferably H 2 ; R 7 1 is H or lower alkyl, more preferably H; L is -(CH 2 ) n - where n is 0, 1 or 2, more preferably 0 (e.g., L is a bond to Q); Q is
- R' 315 is H or lower alkyl, more preferably H; R 315 is a branched lower alkyl; and Ar is phenyl.
- the subject method can be carried out using an inhibitor represented in the general formula:
- R, R7, R 70 , R 71 and X are as defined in formula H above, and
- K represents -(CH 2 ) n , -(CH 2 ) n O, -(CH 2 ) n S, -(CH 2 ) n NR 3 ⁇ 3 ;
- R301 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CH 2 ) n heteroaryl (e.g., substituted or unsubstituted),
- R 30 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl, -(CH 2 ) n heteroaryl, -(CR 309 R 31 o)nCO 2 R 7 , -( CR 309 R 310 ) n CON(R 308 ) 2 , R 303 and R 304 , independently for each occurrence, represents H, lower alkyl,
- -(CH 2 ) n aryl e.g., substituted or unsubstituted
- -(CH 2 ) n heteroaryl e.g., substituted or unsubstituted
- R 308 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl, -(CH 2 ) n heteroaryl, or, taken together along with the N form a 4 to 8 membered heterocycle;
- R 309 and R 310 represent independently for each occurrence, H, lower alkyl, -(CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CFl 2 ) n heteroaryl (e.g., substituted or unsubstituted), or a sidechain of a naturally occurring amino acid;
- R 3 11 is a naturally occurring amino acid or dipeptide or tripeptide connected through an amide linkage
- R 313 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroaryl ;
- W can be selected from (CH 2 ) n , vinyl, acetylene, -O(CH 2 ) n -, - N(R 303 )(CH 2 ) n -, -S(CH 2 ) n -, -(CH 2 ) n -O-, -(CH 2 ) n -N(R 303 )-, -(CH 2 ) n -S-;n is an integer from 0-3 ;
- the subject method can be carried out using an inhibitor represented in the general formula.
- R, R 7 , R 70 , R 7 1 and X are as defined in formula II above, and Ar represents substituted aryl or heteroaryl;
- R 302 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl, -(CH 2 ) n heteroaryl, -(CR 309 R 310 ) n CO 2 R 7 , -( CR 309 R 3 10 ) n CON(R 308 ) 2 ,
- R 303 and R 3Q independently for each occurrence, represents H, lower alkyl, -(CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CH 2 ) n heteroaryl (e.g., substituted or unsubstituted);
- R 3Q8 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl, -(CH 2 ) n heteroaryl, or, taken together along with the N form a 4 to 8 membered heterocycle;
- R 309 and R 3 10 represent independently for each occurrence, H, lower alkyl,
- R 31 1 is a naturally occurring amino acid or dipeptide or tripeptide connected through an amide linkage;
- W can be selected from (CH 2 ) n , vinyl, acetylene, -O(CH2) n -, -
- N(R 303 )(CH 2 ) n -, -S(CH 2 ) n -, -(CH 2 ) n -O-, -(CH 2 ) n -N(R 303 )-, -(CH 2 ) n -S-;n is an integer from 0-3;
- Z can be selected from -N(R 30 )-, -O-, -S- or a direct bond between Y and
- R 70 is H, R is -SH or S-lower alkyl, and more preferably -SH, X is H 2 or O, and more preferably H 2 , R 71 is H or lower alkyl and more preferably H, W is -(CH 2 ) n - where n is 0, 1 or 2, and more preferably 0 (e g , W is a bond to Y), Y is -C(-O)-, Z is -N(R 304 )-, R 304 is 4- py ⁇ dyl, R 3Q IS H, and Ar is benzene
- R', R ⁇ 0 , Ri i, R 70 , R 71 and X are as defined above in formula Ilia, and R 82 is absent or represent one or more substitutions, each of which can independently be a lower alkyl, -(CH) 2 -R 7 or COOR T j, (R7 and R j i being defined above).
- GGPTase inhibitor useful as an antifungal agent may represented in any one of the following generic formulas:
- R', R 10 , Rn, R 7 0, 7 ], s2 > J an ⁇ X are as defined above, and X 3 represents C or N, and Y 3 represents O, S or NH.
- Another class of preferred inhibitors is derived from a piperidine, and is represented in the general formula:
- R, R 7 , R70 and X are as defined in formula II above, and
- R 30 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CH 2 ) n heteroaryl (e.g., substituted or unsubstituted),
- R 302 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl, -(CH 2 ) n heteroaryl , -(CR 309 R 310 ) n CO 2 R 7
- R 303 and R304 independently for each occurrence, represents H, lower alkyl, -(CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CH 2 ) n heteroaryl (e.g., substituted or unsubstituted);
- R 3 0 8 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl, -(CH 2 ) n heteroaryl, or, taken together along with the N form a 4 to 8 membered heterocycle;
- R 3 0 9 and R 310 represent independently for each occurrence, H, lower alkyl, -(CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CH 2 ) n heteroaryl (e.g., substituted or unsubstituted), or a sidechain of a naturally occurring amino acid;
- R'310 represents, individually for each occurrence, a natural or unnatural amino acid sidechain, such as a lower alkyl;
- R311 is an amino acid residue or dipeptide or tripeptide connected through an amide linkage
- W can be selected from (CH 2 ) n , vinyl, acetylene, -0(CH 2 ) n -, - N(R 303 )(CH 2 ) n -, -S(CH 2 ) n - 5 -(CH 2 ) n -O-, -(CH 2 ) n -N(R 3()3 )-, -(CH 2 ) n -S-;n is an integer from 0-3 ;
- R and R 70 are as defined in formula II above, and
- L represents (CH 2 ) n , alkenyl, alkynyl, (CH 2 ) n alkenyl, (CH 2 )nalkynyl, (CH 2 ) n O(CH 2 )p, (CH 2 )nNR3i3(CH 2 )p, (CH 2 )nS(CH 2 )p, (CH 2 ) n alkenyl(CH 2 )p, (CH 2 ) n alkynyl(CH 2 ) p , O(CH 2 ) n , NR 30 i(CH 2 ) n , S(CH 2 ) n ;
- Q represents one of the heterocyclic groups shown below;
- R 3 0 l independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CH 2 ) n heteroaryl (e.g., substituted or unsubstituted);
- R 3 ⁇ 3 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroaryl ;
- R 315 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroaryl , -(CH 2 ) n CO 2 R 316 , -(CH 2 ) n CON(R 316 ) 2 or - (CH 2 ) n COR 317 ;
- R 316 independently for each occurrence, represents H, lower alkyl, (CH 2 ) n aryl, -(CH 2 ) n heteroaryl ;
- R 3 I 7 represents a naturally occurring amino acid, dipeptide, or tripeptide connected through an amide linkage
- any two R 315 when occurring more than once in Q, can be taken together to form a 5 to 8 membered cycloalkyl, aryl, or heteroaryl ring,
- X independently represents either O, or H 2
- m represents 0 or an integer from 1 to 3
- n individually for each occurence, represents 0 or an integer from 1 to 5
- R 70 is H, R is -SH or -S-lower alkyl, more preferably -SH, X is H 2 or O, more preferably O, L is -(CH 2 ) n - where n is 0, 1 or 2, more preferably 0 (e.g , L is a bond to Q), Q is
- R' 3 1 5 is H or lower alkyl, more preferably H, R 3 j 5 is a branched lower alkyl, and R 30 ⁇ is phenyl
- the subject method can be practiced using a compound selected from the teachings of U S patent 5,624,936 and of Canadian Application 2, 143,588, or analogs thereof
- the method of the present invention can be carried out by treatment with a compound represented in the general formula (V) wherein
- R, RJO, Rn, R 7 0, R71, R72 and X are as defined above in formula I;
- A represents a fused ring selected from a group consisting of a cycloalkyl, a cycloalkenyl, an aryl, and a heterocycle, wherein the fused ring A can comprise from 4 to 8 atoms in its ring structure;
- R 1 04 is absent or represents one or more substitutions, each independently selected from lower alkyl, aryl, heterocycle, cycloalkyl, alkenyl, alkynyl, R j 10 O-, Rlll-S(O) m -, R 110 C(O)NR 1 ]0 -, CN, N 3 , (R 110 ) 2 N- C(NR 110 )-, R ⁇ 10 C(O)-, R 1 ]0 OC(O)-, (Rno)2 N - or R ⁇ OC(O)NR ⁇ ⁇ 0 -, lower alkyl unsubstituted or substituted by one or more aryl, heterocycle, cycloalkyl, alkenyl, alkynyl, RJ J Q O-, RlllS(O) m -, R 110 C(O)Nll 110 -, CN, (R 1 10 ) 2 N-, or R ⁇ OC ⁇ -N ⁇ o-;
- RJJO represents hydrogen, lower alkyl, benzyl or aryl
- R j 12 is a lower alkyl or aryl; i is 1, 2, or 3; and p is, independently for each occurrence, 0, 1 or 2. m is an integer in the range of 0 to 2.
- R, R ⁇ 0 , K ⁇ ⁇ , 70, R71, R 72 , R-10 4 ' X and n are as defined above in formula V;
- RJ05 represents H, lower alkyl or phenylalkyl
- Ri 06 represents H or lower alkyl.
- EP publication 618,221 teaches a similar class of compounds which are potential inhibitors of fungal GGPTases for use in the present method, e.g., which antifungal compounds may be represented in the general formula VII:
- Y 2 is -CH 2 - or -C(O)-.
- R ⁇ a and Rii- are selected from hydrogen, lower alkyl, aryl, heterocycle, cycloalkyl, alkenyl, alkynyl, R 110 O-, R ⁇ n-S(O) m -, R 110 C(O)NR 1 10 -, CN, NO 2 , (R 110 ) 2 N-C(NR 110 )-, R 110 C(O)-, R 1 10 OC(O)-, N 3 , (R ⁇ l ⁇ )2N- or R 1 i ]OC(O)NR 11 o- > lower alkyl unsubstituted or substituted by one or more aryl, heterocycle, cycloalkyl, alkenyl, alkynyl, R 1 10 O-, R- ⁇ S(O) m -, R 110 C(O)NR 110 -, CN, (R 110 ) 2 N-, or R ⁇ ⁇ OC(O)-NR 110 -
- Rj Q4 is absent or represents one or more substitutions to Q, each independently selected from lower alkyl, aryl, heterocycle, cycloalkyl, alkenyl, alkynyl, R 110 O-, R ⁇ ⁇ -S(O) m -, R 110 C(O)NR 110 -, CN, N 3 , (R 1 10 ) 2 N- C(NR 110 )-, R 110 C(O)-, R 1 10 OC(O)-, (R ⁇ o N- or R 111 OC(O)NR 110 - ; lower alkyl unsubstituted or substituted by one or more aryl, heterocycle, cycloalkyl, alkenyl, alkynyl, R 1 10 O-, R m S(O) m -, R 1 10 C(O)NR 110 -, CN, (R 110 ) 2 N-, or R ⁇ ⁇ OC(O)-NR 110
- R l05a and RiQ 5 are independently selected from a side chain of an amino acid, or otherwise a straight chain or branched lower alkyl, alkenyl, alkynyl, cycloalkyl, aryl or heterocycle;
- Rj 0 6 represents hydrogen or a lower alkyl
- R 108 and R 10 represent, independently, hydrogen, alkyl, aryl, heterocycle, cycloalkyl, alkenyl, alkynyl, halogen, R n0 O-, R ⁇ ⁇ -S(O) m -, R 110 C(O)NR 110 -, CN, N 3 , (R 110 ) 2 N- C(NR 110 )-, R 110 C(O)-, R 110 OC(O)-, (R 1 10 ) 2 N- or Ri i lOC(O)NRi io-, lower alkyl unsubstituted or substituted by one or more aryl, heterocycle, cycloalkyl, alkenyl, alkynyl, R ⁇ oO-, R ⁇ 11 S(O) m -, R no C(O)NR 110 -, CN, (R 110 ) 2 N-, or R ⁇ ⁇ OC(O
- RjlO represents hydrogen, lower alkyl, benzyl and aryl
- Ri 1 1 is a lower alkyl or aryl
- Q is a substituted or unsubstituted nitrogen-containing bicyclic ring system
- V represents hydrogen, lower alkyl, lower alkenyl, aryl or heterocycle
- W is a heterocycle
- X, Y and Z are independently O, S or H 2 ; m is 0, 1 or 2; n and p are, independently, 0, 1, 2, 3 or 4; and r is an integer in the range of 0-5
- the GGPTase inhibitor can be a compound represented in the general formula LX
- R' represents H, a lower alkyl, a lower alkenyl, an aryl,
- R7 represents an aryl, a cycloalkyl, a cycloalkenyl, or a heterocycle
- Ri l represents H, a carboxy-terminal blocking group, or a pharmaceutically acceptable salt; represents an alkyl, an alkenyl or -(CH 2 ) m -R 7
- R46 independently for each occurrence, represents hydrogen, a lower alkyl or an aryl X
- R 7 0, independently for each occurrence, represents H, ' x 2 R so 5 a lower alkyl, lower alkenyl, lower alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, and an alpha-carbon sidechain of an amino acid residue or analog or other amino-protecting group, or a pharmaceutically acceptable salt or
- R71 represents H or a lower alkyl
- R 72 independently for each occurrence, represents H, lower alkyl, aryl, heteroaryl or the sidechain of a naturally occurring amino acid;
- R 8Q represents an hydrogen, a lower alkyl, a lower alkenyl, a lower alkynyl, or -(CH 2 ) m -R 7 .
- X represents, independently for each occurrence, O or S;
- X 2 represents O or S; and m and n, independently for each occurrence, represent zero or an integer in the range of 1 to 4 inclusive.
- the subject compounds may be selected from the generic structures described in U.S. Patent 5,602,098, and may be represented in the general formula X.
- Inhibitors of fungal GGPTases may also be selected from amongst the class of compounds disclosed in the PCT publication WO95/25086, e.g., represented in the general formula (XI):
- R represents
- R' represents H, a lower alkyl, a lower alkenyl, an aryl,
- R 7 represents an aryl, a cycloalkyl, a cycloalkenyl, or a heterocycle
- R'J represents an alkyl, an alkenyl or -(CH 2 ) m -R 7
- R 4 g independently for each occurrence, represents hydrogen, a lower alkyl or an aryl
- R 70 independently for each occurrence, represents H, a lower alkyl, lower alkenyl, lower alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, and an alpha-carbon sidechain of an amino acid residue or analog or other amino-protecting group, or a pharmaceutically acceptable salt or R 70 and R taken together form a 4 to 8 membered heterocycle;
- R 92 represents H, lower alkyl, aryl, heteroaryl or the sidechain of an amino acid
- R 80 represents an hydrogen, a lower alkyl, a lower alkenyl, a lower alkynyl, or -(CH 2 ) m -R 7 .
- X represents, independently for each occurrence, O or S;
- X 2 represents O or S; and R 93 represents H, lower alkyl, aryl or heteroaryl;
- R 94 represents a cycloalkyl, a heterocycle, an aryl, , , -CH 2 -R 95 , or any other amino-protecting group;
- R 95 represents a lower alkyl, a heterocycle, an aryl, a lower alkoxyl, -(CH 2 ) n - A-(CH 2 ) m -lower alkyl (wherein A is O, S, SO or SO 2 ), or any other side chain of a naturally occurring amino acid;
- R 96 represents H, -NH 2 , -NHOH, heterocycle, aryl, -N(R 97 ) 2 , -OR 98 , - N(R 97 )OR 98 , -NHOR 8 , or any other carboxyl-protecting group;
- R 97 independently for each occurrence, represents a lower alkyl, a heterocycle, an alkyloxycarbonyl, an aryl or any other amino-protecting group;
- R 98 independently for each occurrence, represents H, a lower alkyl, an acyloxyalkyl, alkyloxyalkyl, alkyloxycarbonyl or another hyrdoxyl- or carbonyl- protecting group;
- Y is selected from the group consisting of , , and Ri 2 is absent or represents one or more substitutions independently being a halogen, -OH, a lower alkyl, a lower alkenyl. a lower alkynyl, an alkoxyl, an acyloxyl, an acyl, an aryl, a heterocycle, an alkylsulfonyloxyl, a haloalkylsulfonyloxyl, an arylsulfonyloxyl, or an aryloxyl;
- R j ⁇ 3 represents H, a lower alkyl, an aryl, or a heterocycle
- R 104 represents H, a lower alkyl, an aryl, oi a heterocycle
- Z represents O, S, SO, SO 2 or an amine
- m and n independently for each occurrence, represent zero or an integer in the range of 1 to 4 inclusive.
- the GGPTase inhibitor is an azepine-derived peptidomimetic represented by the general formula ⁇ -amino-N-[l-(2-Leu-2- oxoethyl)-l-azepin-3-yl]-Cys (Formula XII), wherein Cys represents a cysteine or a cysteine analog which is carboxy-terminally linked with a 3 -amino moiety of an azepine, and Leu represents a leucine or leucine analog amino-terminally linked through a peptide bond with the 2-oxoethyl moiety of the azepine.
- the azepine core mimics a dipeptidyl amide backbone, and the Cys, azepine, and Leu moieties together form a peptidyl analog of the general formula Cys-Xaa-Xaa-Leu.
- the Cys moiety can further include an additional amino acid residue or peptide, linked in a peptidyl bond to the N-terminus of the leucine in order to further extend the peptidomimetic at the amino terminus
- the peptidyl-azepine is represented by Formula XIII (numerous examples of GGPTase inhibitors of this general structural class are described in US Patent 5,532,359)
- A represents a fused ring selected from a group consisting of a cycloalkyl, a cycloalkenyl, an aryl, and a heterocyclic ring, wherein the fused ring A can comprise from 4 to 8 atoms in its ring structure,
- R represents
- R' represents H, a lower alkyl, a lower alkenyl, an aryl,
- Ri, R 2 , R 8 and R ⁇ 0 each independently represent hydrogen, halogen, alkyl, alkenyl. alkynyl, hydroxyl, alkoxyl, silyloxy, ammo, nitro, sulfhydryl, alkylthio, lmine, amide, phosphoryl, phosphonate, phosphine, carbonyl, carboxyl, carboxamide, anhydnde, silyl, thioalkyl, alkylsulfonyl, arylsulfonyl, selenoalkyl, ketone, aldehyde, ester, heteroalkyl, nit ⁇ le, guanidine, amidme, acetal, ketal, amine oxide, aryl, heteroaryl, azide, azi ⁇ dine, carbamate, epoxide, hydroxamic acid, imide, oxime, sulfonamide, thioamide, thiocarbamate,
- R 4 and R 5 each independently represent hydrogen, lower alkyl, lower alkenyl, -(CH 2 ) m -R 7 , -C(O)-lower alkyl, -C(O)-lower alkenyl, -C(O)-(CH 2 ) m -R 7 , or a pharmaceutically acceptable salt forming ion, or R and R5 taken together with the N atom to which they are attached complete a heterocyclic ring having from 4 to 8 atoms in the ring structure,
- R 7 represents an aryl, a cycloalkyl, a cycloalkenyl, or a heterocycle
- R 9 is a hydrogen or a lower alkyl, Rj l represents H, a carboxy-terminal blocking group, or a pharmaceutically acceptable salt;
- R' l represents an alkyl, an alkenyl or -(CH 2 ) m -R7 ;
- R 2 represents N(-R 4 )R5;
- R 13 represents hydrogen, or a lower alkyl;
- R 1 is absent or represents one or more substitutions with halogens, lower aikyls, lower alkoxyls, lower alkylthiols, -NO 2 , -CF 3 , -CN, and -OH;
- R 46 independently for each occurrence, represents hydrogen, a lower alkyl or an aryl; o represents an hydrogen, a lower alkyl. a lower alkenyl, a lower alkynyl. or -(CH 2 ) m -R 7 .
- X and X 2 for each occurrence, represents O or S;
- Z represents C or N; and n is zero or an integer in the range of 1 to 6 inclusive; and m is an integer in the range of 0 to 6 inclusive .
- the fused ring A is selected from a group consisting of benzene, pyrrole, furan, thiophene, imidazole, oxazole, thiazole, triazole, pyrazole, pyrrolidine, pyridine, pyrazine, pyridazine and pyrimidine, and the like.
- the fused ring A can be substituted, for example, by any of a halogen, a lower alkyl, a lower alkoxy, a lower alkylthio, -NO 2 , -CF 3 , -CN, and -OH.
- substituents such as a halogen or a nitro group
- substituents are generally required for sedative-hypnotic activity in other benzodiazepines, such as diazepam or nitrazepam.
- R is particularly selected from a group consisting of -(CH 2 ) m -phenyl, -(CH 2 ) n -S-(CH 2 ) m -phenyl, -(CH 2 ) n -O- (CH 2 ) m -phenyl, -(CH 2 ) m -pyridyl, -(CH 2 ) n -S-(CH 2 ) m -pyridyl, and -(CH 2 ) n -O- (CH2) m - ⁇ yridyl.
- each of the benzyl and pyridyl moieties can be substituted at one or more positions with a halogen, a lower alkyl, a lower alkoxy, a lower alkylthio, -NO 2 , -CF 3 , -CN, and -OH.
- R as well as the other substituents of the azepine peptidomimetic, can effect the solubility, as well as membrane partioning of the subject peptidomimetics.
- pyridyl containing R j substituents can exhibit a greater water solubility than the analogous phenyl-substituted azepines
- the peptidomimetic of the present invention is a benzodiazepine represented by the general formula XIV (for specific examples of compounds of this formula, and representative synthetic schemes, see inter alia US Patent 5,580,979)
- X represents O or S
- X 2 represents hydrogen, a lower alkyl, -(CH 2 ) m -OH, -(CH 2 ) m -O-lower alkyl, a carboxyl, an amide, a mtrosyl, a sulfhydryl, a sulfonyl, or a sulfonamide, n is zero or an integer in the range of 1 to 6 inclusive, and m is an integer in the range of 1 to 6 inclusive
- the peptidomimetic can be a 5 -phenyl substituted 1 ,4-d ⁇ azep ⁇ ne repi esented by the general formula XV
- azepine-de ⁇ ved mimetics from which a fungal GGPTase inhibitor can be selected are described in PCT publication WO97/30992, e g , the inhibitor may be represented in one of the general formulas XVI, XVII, XVIII, XIX (XVI)
- V, W and X are selected from the group consisting of O, H 2 , R 2 QI, R 2 O2 or R 203i F and Y 4 are selected from the group consisting of CHR 2 o 9 , SO 2 , SO 3 , CO,
- R 206> R 207 ' R 209> R 210> R 211> R 212> R 213> R 214> R 215 R 216> R 217> R 218> R 2 i 9 , R220> R 221' R 222> R 224> R 225> R 226> R 227> R 228> R 229> R 230> R 23b R 232> R 233-
- R2 04 and R 2 os are selected from the group consisting of H, halogens, nitro, cyano, and U-R 223 ;
- U is selected from the group consisting of S, O, NR224, CO, SO, SO 2 , CO 2 ,
- R 20 l> R202' R 2 0 3 are absent or, each independently, selected from the group consisting of aikyls, alkoxycarbonyl, alkenyl, alkynyl, aralkyl, cycloalkyl, aryl, heterocycle, cyano, carboxy and carbamyl, or cases where there are two substituents on a single nitrogen, selected from the group consisting of alkyl, aryl or araalkyl, or any two of the R 2 o ⁇ > 202 and R 2Q 3 taken together form a cycloalkyl or heterocycle;
- R 2 o 8 and R 223 are selected from the group consisting of H, aikyls, alkenyls, alkynyls, aralkyls, cycloalkyls, aryls and heterocycles;
- Yj, Y 2 , and Y 3 are, independently, absent or selected from the group consisting of -CH 2 _, -C(O)- and -CH(CH 2 ) p Q-;
- Q is NR 236 , R23 7 , OR 238 or CN;
- A, B, D and E are C, O, S or N, with the provisos that
- V and W are not both oxygens; or (ii) W and X together can be oxygen only if F is either absent, 0, NR 2 ⁇ o > CHR20 , -N(R 2 ⁇ )-C(O)- or -N(R 215 )-SO 2 - in formulas XVII and XVIII. and V and X together with can be oxygen only if F is O, NR 2 ⁇ o, CHR 209 , -N(R 214 )-C(O)- or -N(R 215 )-SO 2 - in formulas XIX and XX; or
- R 23 may be H 2 except when U is SO, SO 2 , NR 2 25CO 2 , or N 228 O 2 ; or
- R 2 Q 8 may be H except when F is SO 2 , CO 2 ,
- the subject method makes use of inhibitors lepresent in the general formula
- R, R 7 , R 7 0, R 7 1 and X are as defined in formula II above, and
- X 5 represents (CH 2 ) n or (CH 2 ) n CO
- R 322 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl, -(CH 2 ) n heteroaryl , -(CR 309 R 31 ⁇ ) n CO 2 R 7 , -(CR 309 R 310 ) n CON(R 308 ) 2 , -(CR 309 R 3 ⁇ o) n COR 3 n, or
- R 322 and R 322 taken together, form a 5-8 membered heterocycle (substituted or unsubstituted);
- R 3 0 8 independently for each occurrence, represents H, lower alkyl, - (CH 2 ) n aryl, -(CH 2 ) n heteroaryl ;
- R 30 and R 3 ]0 represent independently for each occurrence, H, lower alkyl, -(CH 2 ) n aryl (e.g., substituted or unsubstituted), -(CH 2 ) n heteroaryl (e.g., substituted or unsubstituted), or a sidechain of a naturally occurring amino acid;
- R 3 ⁇ is a naturally occurring amino acid; and n is 0 or an integer from 1 to 5.
- the inhibitor is represented in the formula
- R' is H or lower alkyl, more preferably H; R 71 is H or lower alkyl, and more preferably H; X 5 is -CH 2 -; one R 322 represents H and the other R 322 represents aralkyl or arahetero alkyl (more preferably -CH 2 -aryl, and even more preferably - CH 2 -3-biphenyl), or both R 322 and R 322 taken to together form an N-heterocycle or N-heteroaryl, more preferably a piperazine, and even more preferably piperazin-1-yl- [4-bis-parafluorophenylmethyl] .
- the subject compound is represented by one of the following formulas.
- the subject compounds may be retro N-alkyl oligogiycine peptoids (Simon et al. Proc. Natl. Acad. Sci., USA 1992, 89, 9367; Zuckermann et al. J. Med. Chem. 1994, 37, 2678), represented by Formula XX:
- R represents, independently for each occurrence, H, Me, lower alkyl, aryl, aralkyl, heteroalkyl, or heteroaryl;
- R' represents, independently for each occurrence, Me, lower alkyl, aryl, aralkyl, heteroalkyl, or heteroaryl;
- Z represents H, Me, lower alkyl, aryl, aralkyl, heteroalkyl, heteroaryl, acyl, sulfonyl, -C(O)OR, or -C(O)N(R) 2 ; and n represents, independently for each occurrence, an integer in the range 1 to 3 inclusive.
- the subject compounds may be ,V-alkyl oligogiycine peptoids, represented by Formula XXI:
- R represents, independently for each occurrence, H, Me, lower alkyl, aryl, aralkyl, heteroalkyl, or heteroaryl;
- R' represents, independently for each occurrence, Me, lower alkyl, aryl, aralkyl, heteroalkyl, or heteroaryl;
- Z represents H, Me, lower alkyl, aryl, aralkyl, heteroalkyl, heteroaryl, acyl, sulfonyl, -C(O)OR, or -C(O)N(R) 2 ; and n represents, independently for each occurrence, an integer in the range 1 to 3 inclusive.
- the subject compound comprises the structure of general formula XXIII:
- R70 represents heteroaryl or aryl.
- certain peptidomimetics of the present invention may exist in particular geometric or stereoisomeric forms.
- the present invention contemplates all such compounds, including cis- and tr ⁇ '-isomers, R- and ⁇ -enantiomers, diastereomers, D-isomers, L-isomers, the racemic mixtures thereof, and other mixtures thereof, as falling within the scope of the invention.
- Additional asymmetric carbon atoms may be present in a substituent such as an alkyl group. All such isomers, as well as mixtures thereof, are intended to be included in this invention.
- a particular enantiomer of a compound of the present invention may be prepared by asymmetric synthesis, or by derivation with a chiral auxiliary, where the resulting diastereomeric mixture is separated and the auxiliary group cleaved to provide the pure desired enantiomer.
- diastereomeric salts may be formed with an appropriate optically-active acid or base, followed by resolution of the diastereomers thus formed by fractional crystallization or chromatographic means well known in the art, and subsequent recovery of the pure enantiomers.
- the GGPTase inhibitors of the subject method are non-peptide inhibitors of GGPTase.
- the methods of the present invention can be carried out with antifungal analogs of prenyl diphosphates, particularly geranylgeranyl diphosphate.
- Such inhibitors include acyclic terpenes.
- Terpenes are organic compounds constructed of multiples of 2-methyl-l, 3-butadiene.
- the inhibitors of the present invention can be analogs of monoterpenes (those containing two isoprene units, such as myrcenyl moieties), sesquiterpenes (those containing three such units, such as farnesyl moieties) or diterpenes (those containing four isoprene subunits, such as geranylgeranyl moieties).
- the terpene-derived GGPTase inhibitor is represented in the general formula (XXII): XXII wherein
- R independently for each occurrence, represents a halogen or lower alkyl
- R l represents -H, -OH, -O-alkyl, -O-aryl, -O-C(O)-H, -O-C(O)-alkyl, or -O- C(O)-aryl;
- Y represents a bond (i.e. is absent) or -S-, -O-, -(CH 2 ) m -,
- Q represents -C r C 6 alkyl-R 2 , -C(O)-R 2 , -NH-(CH 2 ) n -R 2 , -NH-C(O)- (CH 2 ) n -R 2 , -C(O)-NH(CH 2 ) n -R 2 ;
- R2 represents a hydrogen, a lower alkyl, or a phosphate or bisphosphate or analog thereof such as sulfate, sulfonate, sulfamoyl, sulfinyl, sulfoxyl, sulfinate, phosphoryl, phosphorothioate, phosphoramidite, phosphonamidite or boronate; or Y and Q taken together represent ,
- R 3 represents a hydrogen or lower alkyl, and R , independently for each occurrence, represents a hydrogen, lower alkyl, -OH, -O-lower alkyl, or a carboxyl blocking group;
- m independently for each occurrence, is an integer in range of 1 to 6 inclusive;
- n independently for each occurrence, is zero or an integer in range of 1 to 6 inclusive; and
- N is an integer in the range of 1 to 3 inclusive (though preferably 2).
- the art describes, in the context of inhibition of mammalian FPTases or GGPTases, a variety of analogs of isoprenyl diphosphates, e.g., wherein the biologically labile diphosphate moiety is replaced with a group that is a stable isostere.
- the various compounds described in the art, and certain equivalents that may be evident therefrom, can be tested for inhibition of fungal cell growth either directly, or by first assessing the compounds in such high throughput, cell-free assays as described herein.
- Macchia et al. (1996) J Med Chem 39: 1352 describes non- peptidic inhibitors of mammalian GGPTase activity.
- the compounds described by Macchia et al. include those which are represented in the general formula XXII (as above)
- N 2; each R represents a methyl; Ri represents hydrogen;
- Y represents -O-;
- Q represents C(O)-NH(CH 2 ) n -R 2 or -NH-C(O)-(CH 2 ) n -R 2 ; and
- R 2 represents a sulfamoyl, phosphoryl or phosphorylalkyl.
- Balsamo PCT publication WO97/19091 describes other GGPTase inhibitors which may be useful in the subject method.
- the compounds described in this application are also represented in general formula XXII above, wherein
- Y represents -CH 2 -X-A-, CH 2 -CH 2 , or -CH(OH)-;
- X represents -ONH-, -O-NH-C(O)-, -OCH 2 C(O)-, OCH 2 P(O)(OH)-, - NHC(O)-, -NCH 3 C(O)-, -O-SO 2 -, or -NHSO 2 -;
- A represents -C(R')(R")-, -C(R')HCH 2 -, NH when X- -OSO 2 -, or -NHSO 2 -
- B represents -OC(O)-. -0-, -ONHC(O)-, -NHC(O)-, or -NCFI 3 C(O)-; and R'. R" each independently represent H, CH , or CH 2 CH ;
- W-Y-CH 2 -0 wherein W represents farnesyl, geranylgeranyl, substituted farnesyl, or substituted geranylgeranyl;
- Y represents -S-, -O-, -CH 2 -,
- Q represents ;
- Ti represents H, F, or -(CH 2 ) n -X 1 ,
- T 2 is -NHCOCH 3 , -NH-(CH2) n -X, , -NHC(O)-OC(CH 3 ) 3 , or an oligopeptide of 20 or fewer amino acids, linked to the carbon via the N terminal nitrogen;
- XI represents -SH, -COOH, CONH 2 .
- T 3 represents -C(O)-X 2 , -CH(O), -C(O)-CF 3 , -C(O)-CF 2 -X 2 , -CH(OH)- (CH 2 ) n -C(O)-X 2 , -CH 2 -X 2 , -CF 2 -X 2 , X 2 represents a peptide of 20 or fewer amino acids, linked to the carbon via the N terminal nitrogen.
- Q is a peptide or peptidyl moiety which resembles the substrate of a fungal GGPTase, e.g., a sequence from a fungal Rhol -like phosphatase which includes the GGPTase recognition sequence.
- the antifungal agent may be represented in the general formula:
- X is O or S; R 30 1 represents ; and n is 0, 1 or 2.
- GGPTase inhibitors which are useful in the method of the present invention may also be found in the compounds described in the PCT publication WO92/20336, which are similar to the structure:
- the inhibitor of the fungal GGPTase is a small organic molecule which is neither peptidyl or prenyl in nature.
- U.S. Patent 5,721,236 describes tricyclic carbamate compounds and the like as inhibitors of mammalian FPTase activities. It is contemplated herein that within the generic class of compounds disclosed in that patent there exist inhibitors selective for a fungal GGPTase, e.g., represented in the general formula:
- A, B, D and E independently represent C or N or NR 3Q9 ;
- Y independently for each occurrence, represents O or H 2 ;
- X represents N or C;
- Z represents O or S
- R 30 I is absent, or represents one or more substitutions of the ring I, each independently selected from halogens, -CF 3 , -OR 310 , -COR 310 , -SR 310 , -N(R 3 ]0 ) 2 , - NO 2 , -C(O)R 310 , -CO 2 R 3 ⁇ o, -0C0R 310 , benzotriazol-1-yloxy, CN, alkynyl, alkenyl or alkyl;
- R 3 02 is absent, or represents one or more substitutions of the ring III, each independently selected from halogens, -CF 3 , -OR 3 ]0 , -COR ]0 , -SR 3 ]0 , -N(R 3 ⁇ 0 ) 2 , - NO 2 , -C(O)R 310 , -CO 2 R 3 o, -0C0R 31 ⁇ , benzotriazol- 1 -yloxy, CN, alkynyl, alkenyl or alkyl;
- R 303 represents -SR 310 , -OR 310 , -N(R 310 ) 2 or -(CH 2 ) m R 3 ⁇ 0 ;
- R 30 5 is absent, or represents one or more substitutions of the ring IV, each independently selected from halogens, -CF 3 , alkyl, or aryl;
- R 3 l ⁇ independently for each occurrence, represents H, alkyl, cycloalkyl, aryl or aralkyl;
- R 316 and R ⁇ each independently represent H or F when the bond to X is a single bond and X is C, or R 3 ⁇ 8 is absent when X is N, or both R 3 i ⁇ and R 3 ]8 are absent when the bond to X is a double bond (and X is C); m is 0 or an integer in the range 1 to 3: and n is an integer in the range 1 to 3.
- inhibitors of prenyltransferases are the quinolinone derivatives disclosed in PCT publication WO97/21701.
- Inhibitors suitable for use in the subject method may be selected from amongst these compounds, e.g., having a structure represented in the general formula: wherein
- X is O or S;
- R 352 , R 353 and R 366 independently represent H, halo, hydroxyl amino, cyano, alkyl, alkenyl, alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, or alkylsulfonylalkyl, or
- R 352 and R 353 when on adjacent positions, can be taken together to form a ring of 5 to 8 ring atoms;
- R 35(5 and R 357 are each independently H, halo, cyano, alkyl, alkyloxy, aryl, aryloxy, alkylthio, alkylamino, or
- R 35 g and R 3 5 7 when on adjacent positions, can be taken together to form a ring of 5 to 8 ring atoms
- R 358 is H. halo, hydroxyl amino, cyano, alkyl, alkenyl, alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, -O-R 360 , -S-R 36Q , -N(R 36 ⁇ ) 2 ;
- R 359 independently for each occurrence, represents hydroxyl, alkyl, alkyloxy, amino or alkylamino
- R 3 60 independently for each occurrence, represents hydrogen, alkyl, alkylcarbonyl, aryl, arylalkyl, alyyloxycarbonylalkyl, -alkyl-OR 36 ⁇ or -alykyl-
- R 36 independently for each occurrence, represents hydrogen, alkyl, aryl, or arylakyl
- R 367 is hydrogen, halo, cyano, alkyl, alkyloxycarbonyl, or aryl;
- R 368 is hydrogen, halo, alkyl, or alkyloxy;
- R 3 g 9 is hydrogen or alkyl; and m is integer from 1 to 5.
- Ar represents an aryl group (e.g., substituted or unsubstituted);
- X a represents, independently for each occurrence, O, S or H 2 R represents
- R' represents H, a lower alkyl, a lower alkenyl, an aryl,
- R7 represents an aryl, a cycloalkyl, a cycloalkenyl, or a heterocycle
- R'l represents an alkyl, an alkenyl or -(CH 2 ) m -R 7 .
- R 46 independently for each occurrence, represents hydrogen, a lower alkyl or an aryl
- R 70 independently for each occurrence, represents H, A2 so , a lower alkyl, lower alkenyl, lower alkynyl, aryl, alkylaryl, cycloalkyl, alkoxyalkyl, alkylthioalkyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, alkoxycarbonylalkyl, arylalkyl, alkylsulfonylalkyl, and an alpha-carbon sidechain of an amino acid residue or analog or other amino-protecting group, or a pharmaceutically acceptable salt or
- R 80 represents an hydrogen, a lower alkyl, a lower alkenyl, a lower alkynyl, or -(CH 2 ) m -R 7;
- R 370 represents an hydrogen, a lower alkyl, a lower alkenyl, a lower alkynyl, -(CH 2 ) m -O-lower alkyl, -(CH 2 ) m -O-R 7 , or -(CH 2 ) m -R 7 .
- X represents, independently for each occurrence, O or S;
- X 2 represents O or S ;
- m and n independently for each occurrence, represent zero or an integer in the range of 1 to 4.
- R is -SR'; R' is H or lower alkyl, preferably H; Ar is C6-C12 aryl; R 70 are each H; R 370 is -(CH 2 ) 2 -O-CH 3 ; X a is O; n is 1.
- Inhibitors suitable for use in the subject method may be selected from amongst these compounds, e.g., having a structure represented in the general formula:
- R 4 QI, 4 02> R 403 nc * R 404 eacn independently represent H, alkyl, aryl, alkylaryl, arylalkyl, ammonium, alkali metal or a prodrug ester.
- X la represents -0-, -S(O) m -, -N(R 3a )-, -(CH 2 ) 2 -, or -CHCH-; m is an integer of 0 to 2;
- R la represents hydrogen, lower alkyl, aralkyl, acyl, lower alkylsulfonyl, aralkylsulfonyl, or arylsulfonyl;
- R 2a represents lower alkyl;
- R ja represents lower alkyl, or aralkyl
- R 4a represents mercapto lower alkyl. lower alkylthio lower alkyl, lower alkylsulfinyl lower alkyl, lower alkylsulfonyl lower alkyl. or hydroxy lower alkyl;
- R 5a represents hydrogen, or lower alkyl; R 4a and R 3a may together form C 2 to C alkylene.
- the pharmaceutically acceptable salts of the subject GGPTase inhibitors include the conventional nontoxic salts or quaternary ammonium salts of the compounds, e.g., from non-toxic organic or inorganic acids.
- such conventional nontoxic salts include those derived from inorganic acids such as hydrochloric, hydrobromic, sulfuric, sulfamic, phosphoric, nitric, and the like; and the salts prepared from organic acids such as acetic, propionic, succinic, glycolic, stearic, lactic, malic, tartaric, citric, ascorbic, pamoic, maleic, hydroxymaleic, phenylacetic, glutamic.
- benzoic salicyclic, sulfanilic, 2-acetoxybenzoic, fumaric, toluenesulfonic, methanesulfonic, ethane disulfonic, oxalic, isethionic, and the like.
- the pharmaceutically acceptable salts of the present invention can be synthesized from the subject GGPTase inhibitor which contain a basic or acid moiety by conventional chemical methods. Generally, the salts are prepared by reacting the free base or acid with stoichiometric amounts or with an excess of the desired salt- forming inorganic or organic acid or base in a suitable solvent.
- the pharmaceutically acceptable salts of the acids of the subject GGPTase inhibitors are also readily prepared by conventional procedures such as treating an acid of the compound with an appropriate amount of a base such as an alkali or alkaline earth metal hydroxide (e.g.
- an organic base such as an amine, piperidine, pyrrolidine, benzylamine and the like, or a quaternary ammonium hydroxide such as tetramethylammonium hydroxide and the like.
- Contemplated equivalents of the compounds described herein include compounds which otherwise correspond thereto, and which have the general properties thereof (e.g. the ability to inhibit a fungal GGPTase), wherein one or more simple variations of substituents are made which do not adversely affect the efficacy of the compound in inhibiting such enzymes.
- peptide analogs of the present invention can be generated using, in addition to the benzodiazepines described above, substituted gamma lactam rings (Garvey et al. in Peptides: Chemistry and Biology, G.R. Marshall ed., ESCOM Publisher- Leiden, Netherlands, 1988, pi 23), C-7 mimics (Huffman et al. in Peptides:
- the peptidomimetic can be derived as a retro- inverso analog of the peptide.
- certain of the subject peptides can be 25 generated as the retro-inverso analog:
- retro-inverso analogs can be made according to the methods known in the art, such as that described by the Sisto et al. U.S. Patent 4,522,752.
- the illustrated retro-inverso analog can be generated as follows.
- cysteine analog is synthesized by treating an S-protected (e.g. as the benzoyl) N-Boc-L-cysteine with ammonia under HOBT-DCC coupling conditions to yield N-Boc-L-cysteinylamide, and then effecting a Hofmann-type rearrangement with I,I-bis-(trifluoroacetoxy)iodobenzene (TIB), as described in Radhakrishna et al. (1979) J. Org. Chem. 44: 1746.
- TIB I,I-bis-(trifluoroacetoxy)iodobenzene
- the peptidomimetic can be derived as a retro-enantio analog of the peptide, such as the exemplary retro-enantio peptide analog:
- Retro-enantio analogs such as this can be synthesized using D-enantiomers of commercially available D-amino acids or other amino acid analogs and standard solid- or solution-phase peptide-synthesis techniques.
- the side-chains of the resulting peptide are coincident in space with the sidechains of the L-amino acid peptide, though the backbone amide is reversed, rendering that bond resistant to cleavage.
- trans-olefin derivatives can be made with the subject peptide analogs.
- an exemplary olefin analog is:
- the tra/K-olefln analog of a cysteine-containing peptide can be synthesized according to the method of Y.K. Shue et al. (1987) Tetrahedron Letters 28:3225.
- the following example is illustrative:
- R' may correspond to the side chain of a second natural amino acid
- peptidomimetic derivatives Another relevant class of peptidomimetic derivatives is the phosphonates.
- the utility of phosphonic acids as peptide analogues derives, to a great extent, from the similarities between ⁇ -amino carboxylic acids and ⁇ -amino phosphonic acids. Significant progress has been reported recently in the synthesis of enantiomerically- pure ⁇ -amino phosphonic acids (see: Smith et al. Org. Synth. 1997, 7 5, 19-30; and references cited therein).
- the peptidomimetic will comprise a phosphonamide linkage in place of the natural amide linkage. Any amide linkage in a given peptide may be replaced with a phosphonamide linkage; the tetrapeptide analog below serves as an illustrative embodiment:
- the ability of fungal cells to transport ectopically added compounds, particularly peptide or peptide-like compounds, can be enhanced by conjugation of the compound with a transport tag, such as an amino acid residue, nucleotide or nucleoside, small molecule fragment, or oligopeptide (preferably a dipeptide or tripeptide) which promotes cellular uptake, e.g., by at least an order of magnitude, preferably by at least two orders of magnitude.
- the transport take selectively increases uptake by the fungal cell as opposed to a host cell, e.g., in a permease-mediated transport mechanism.
- fungal prenyltransferase inhibitors may include a "permease tag", e.g., which comprises a molecular fragment such as an amino acid residue, dipeptide, or tripeptide which facilitates permease-mediated transport of the inhibitor into the fungal pathogen.
- a permease tag e.g., which comprises a molecular fragment such as an amino acid residue, dipeptide, or tripeptide which facilitates permease-mediated transport of the inhibitor into the fungal pathogen.
- Such compounds can have desirable pharmacokinetic properties due to, for example, increased bio availability and/or increased selectivity.
- the transport tag does not increase the cellular uptake of the inhibitor by mammalian cells to any greater degree than it does for cellular uptake by the fungal pathogen, though in the most preferred embodiments, the transport tag increases the uptake by fungal cells to a greater degree than for uptake by mammalian cells, e.g., is selective for fungal cells by at least an order of magnitude, preferably by at least two orders of magnitude.
- additional transport tags and transport mechanisms may be found in Hogue et al., Biochem Biophys Res Commun. 1997, 238, 81 1 -6; Brethes et al., Eur J. Biochem. 1992, 204, 699; and Pinson et al., J. Biol. Chem., 1997, 272, 28918-24.
- the permease tag is removed from the inhibitor as a result of its permease-mediated transport into the fungal pathogen.
- the amino acid or oligopeptide of the permease tag includes a free N-terminal amine, or a group hydrolyzable thereto under the conditions that the pathogen is contacted with the inhibitor.
- the permease tag facilitates permease-mediated transport by an alanine transporter of the fungal pathogen.
- the inhibitor is derivatized at a free amine with L-alanine, or a dipeptide or tripeptide including L-alanine.
- the L-alanine moiety is attached to the prenyltransferase inhibitor through an amide linkage through either an amine or carboxyl group of the inhibitor, and provides the complementary functionality in the permease tag.
- the L-alanine containing permease tag is provided by derivatization of a free amine on the inhibitor with a carboxyl group on an L-alanine containing oligopeptide, with the oligopeptide providing a free amine (or a group which is hydrolyzable thereto)
- Candida permeases are known in the art, and appropriate permease tags can be generated for facilitating uptake of the subject inhibitors by other permease-mediated mechanisms.
- the permease tag can be selected to increase uptake of the inhibitor by any one of the following Candida permeases: reference permease
- Additional transport tags that increase the uptake or localization of a prenyltransferase inhibitor in to a fungal cell can be easily identified using assay techniques known in the art. For example a culture of target cells may be treated with a library of test tags, each labelled with a detectable label, such as a fluorescent label, as described in Doling et al., Mol. Memhr. Biol., 1998, 75, 79-88. Detection of elevated levels of the label within a cell would then indicate favorable transport properties associated with the corresponding test tag.
- a detectable label such as a fluorescent label
- Selectivity for fungal cells could be determined using paired assays, one assay in which labelled test tags are applied to fungal cells, and a second assay in which labelled test tags are applied to control cells, such as mammalian cells. Labels which are detected at higher levels in a fungal cell than in a control cell may thus be useful for delivering a prenyltransferase inhibitor preferentially to cells of a fungal pathogen in a host.
- a compound according to the present invention has the structure X-Y, wherein X is a moiety that inhibits a prenyltransferase activity of a fungal pathogen, e.g., with a MIC50 of less than 25 ⁇ g/mL, and Y is a moiety that promotes the accumulation of X-Y in a fungal cell relative to X alone, e.g., by at least a factor of 10, preferably at least a factor of 100.
- Y selectively promotes accumulation in fungal cells relative to host, e.g., mammalian, cells, e.g., by at least a factor of 10, preferably at least a factor of 100.
- compositions which comprise a therapeutically-effective amount of one or more GGPTase inhibitors, such as described above, formulated together with one or more pharmaceutically acceptable carriers (additives) and/or diluents for use in the treatment of fungal infections.
- compositions of the present invention may be specially formulated for administration in solid or liquid form, including those adapted for the following: (1) oral administration, for example, drenches (aqueous or non-aqueous solutions or suspensions), tablets, boluses, powders, granules, pastes for application to the tongue: (2) parenteral administration, for example, by subcutaneous, intramuscular or intravenous injection as, for example, a sterile solution or suspension; (3) topical application, for example, as a cream, ointment or spray applied to the skin; or (4) intravaginally or intravectally, for example, as a pessary, cream or foam.
- oral administration for example, drenches (aqueous or non-aqueous solutions or suspensions), tablets, boluses, powders, granules, pastes for application to the tongue
- parenteral administration for example, by subcutaneous, intramuscular or intravenous injection as, for example, a sterile solution or suspension
- topical application for
- terapéuticaally-effective amount means that amount of a compound, material, or composition comprising a GGPTase inhibitor according to the present invention which is effective for producing some desired therapeutic effect by inhibiting fungal cell wall biosynthesis.
- phrases "pharmaceutically acceptable” is employed herein to refer to those compounds, materials, compositions, and/or dosage forms which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio.
- pharmaceutically-acceptable carrier means a pharmaceutically-acceptable material, composition or vehicle, such as a liquid or solid filler, diluent, excipient, solvent or encapsulating material, involved in carrying or transporting the subject peptidomimetic agent from one organ, or portion of the body, to another organ, or portion of the body
- a pharmaceutically-acceptable material such as lactose, glucose and sucrose
- starches such as corn starch and potato starch
- cellulose, and its derivatives such as sodium carboxymethyl cellulose, ethyl cellulose and cellulose acetate
- (4) powdered tragacanth such as malt, (6) gelatin, (7) talc, (8) excipients, such as cocoa butter and suppository waxes, (9) oils, such as peanut oil,
- GGPTase-inhibitors may contain a basic functional group, such as amine or alkylamino, and are, thus, capable of forming pharmaceutically-acceptable salts with pharmaceutically- acceptable acids
- pharmaceutically-acceptable salts refers to the relatively non-toxic, inorganic and organic acid addition salts of GGPTase inhibitors These salts can be prepared in sit during the final isolation and purification of the peptidomimetics of the invention, or by separately reacting a purified peptidomimetic of the invention in its free base form with a suitable organic or inorganic acid, and isolating the salt thus formed
- Representative salts include the hydrobromide, hydrochlo ⁇ de, sulfate, bisulfate, phosphate, nitrate, acetate, valerate, oleate, palmitate, stearate, laurate, benzoate, lactate, phosphate, tosylate, cit
- the compounds of the present invention may contain one or more acidic functional groups and, thus, are capable of forming pharmaceutically- acceptable salts with pharmaceutically-acceptable bases
- pharmaceutically- acceptable salts refers to the relatively non-toxic, inorganic and organic base addition salts of a GGPTase inhibitor
- GGPTase inhibitor GGPTase inhibitor
- these salts can likewise be prepared in situ du ⁇ ng the final isolation and purification of the peptides or peptidomimetics, or by separately reacting the purified compound in its free acid form with a suitable base, such as the hydroxide, carbonate or bicarbonate of a pharmaceutically-acceptable metal cation, with ammonia, or with a pharmaceutically- acceptable organic primary, secondary or tertiary amine.
- Representative alkali or alkaline earth salts include the lithium, sodium, potassium, calcium, magnesium, and aluminum salts and the like.
- Representative organic amines useful for the formation of base addition salts include ethylamine, diethylamine, ethylenediamine, ethanolamine, diethanolamine, piperazine and the like (See, for example, Berge et al., supra)
- Wetting agents, emulsifiers and lubricants such as sodium lauryl sulfate and magnesium stearate, as well as coloring agents, release agents, coating agents, sweetening, flavoring and perfuming agents, preservatives and antioxidants can also be present in the compositions.
- antioxidants examples include: (1) water soluble antioxidants, such as ascorbic acid, cysteine hydrochloride, sodium bisulfate, sodium metabisulfite, sodium sulfite and the like; (2) oil-soluble antioxidants, such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), lecithin, propyl gallate, alpha-tocopherol, and the like; and (3) metal chelating agents, such as citric acid, ethylenediamine tetraacetic acid (EDTA), sorbitol, tartaric acid, phosphoric acid, and the like.
- water soluble antioxidants such as ascorbic acid, cysteine hydrochloride, sodium bisulfate, sodium metabisulfite, sodium sulfite and the like
- oil-soluble antioxidants such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), le
- Formulations of the present invention include those suitable for oral, nasal, topical (including buccal and sublingual), rectal, vaginal and/or parenteral administration.
- the formulations may conveniently be presented in unit dosage form and may be prepared by any methods well known in the art of pharmacy.
- the amount of active ingredient which can be combined with a carrier material to produce a single dosage form will vary depending upon the host being treated, the particular mode of administration.
- the amount of active ingredient which can be combined with a carrier material to produce a single dosage form will generally be that amount of the GGPTase inhibitor which produces a therapeutic effect. Generally, out of one hundred percent, this amount will range from about 1 percent to about ninety-nine percent of active ingredient, preferably from about 5 percent to about 70 percent, most preferably from about 10 percent to about 30 percent.
- Methods of preparing these formulations or compositions include the step of bringing into association a compound of the present invention with the carrier and, optionally, one or more accessory ingredients.
- the formulations are prepared by uniformly and intimately bringing into association a peptide or peptidomimetic of the present invention with liquid carriers, or finely divided solid carriers, or both, and then, if necessary, shaping the product.
- Formulations of the invention suitable for oral administration may be in the form of capsules, cachets, pills, tablets, lozenges (using a flavored basis, usually sucrose and acacia or tragacanth), powders, granules, or as a solution or a suspension in an aqueous or non-aqueous liquid, or as an oil-in-water or water-in-oil liquid emulsion, or as an elixir or syrup, or as pastilles (using an inert base, such as gelatin and glycerin, or sucrose and acacia) and/or as mouth washes and the like, each containing a predetermined amount of a compound of the present invention as an active ingredient.
- a peptide or peptidomimetic of the present invention may also be administered as a bolus, electuary or paste.
- the active ingredient is mixed with one or more pharmaceutically-acceptable carriers, such as sodium citrate or dicalcium phosphate, and/or any of the following: (1) fillers or extenders, such as starches, lactose, sucrose, glucose, mannitol, and/or silicic acid; (2) binders, such as, for example, carboxymethylcellulose, alginates, gelatin, polyvinyl pyrrolidone, sucrose and/or acacia; (3) humectants, such as glycerol; (4) disintegrating agents, such as agar-agar, calcium carbonate, potato or tapioca starch, alginic acid, certain silicates, and sodium carbonate; (5) solution retarding agents, such as paraffin; (6) absorption accelerators, such as quaternary ammonium compounds; (7) wetting agents, such as, for example,
- compositions may also comprise buffering agents.
- Solid compositions of a similar type may also be employed as fillers in soft and hard-filled gelatin capsules using such excipients as lactose or milk sugars, as well as high molecular weight polyethylene glycols and the like.
- a tablet may be made by compression or molding, optionally with one or more accessory ingredients.
- Compressed tablets may be prepared using binder (for example, gelatin or hydroxypropylmethyl cellulose), lubricant, inert diluent, preservative, disintegrant (for example, sodium starch gfycolate or cross-linked sodium carboxymethyl cellulose), surface-active or dispersing agent.
- Molded tablets may be made by molding in a suitable machine a mixture of the powdered peptide or peptidomimetic moistened with an inert liquid diluent.
- the tablets, and other solid dosage forms of the pharmaceutical compositions of the present invention may optionally be scored or prepared with coatings and shells, such as enteric coatings and other coatings well known in the pharmaceutical-formulating art. They may also be formulated so as to provide slow or controlled release of the active ingredient therein using, for example, hydroxypropylmethyl cellulose in varying proportions to provide the desired release profile, other polymer matrices, liposomes and/or microspheres.
- compositions may be sterilized by, for example, filtration through a bacteria-retaining filter, or by incorporating sterilizing agents in the form of sterile solid compositions which can be dissolved in sterile water, or some other sterile injectable medium immediately before use.
- These compositions may also optionally contain opacifying agents and may be of a composition that they release the active ingredient(s) only, or preferentially, in a certain portion of the gastrointestinal tract, optionally, in a delayed manner.
- embedding compositions which can be used include polymeric substances and waxes.
- the active ingredient can also be in micro-encapsulated form, if appropriate, with one or more of the above-described excipients.
- Liquid dosage forms for oral administration of the compounds of the invention include pharmaceutically acceptable emulsions, microemulsions, solutions, suspensions, syrups and elixirs.
- the liquid dosage forms may contain inert diluents commonly used in the art, such as, for example, water or other solvents, solubilizing agents and emulsifiers, such as ethyl alcohol, isopropyl alcohol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylene glycol, oils (in particular, cottonseed, groundnut, corn, germ, olive, castor and sesame oils), glycerol, tetrahydrofuryl alcohol, polyethylene glycols and fatty acid esters of sorbitan, and mixtures thereof.
- inert diluents commonly used in the art, such as, for example, water or other solvents, solubilizing agents and
- the oral compositions can also include adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring, coloring, perfuming and preservative agents.
- adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring, coloring, perfuming and preservative agents.
- Suspensions in addition to the active GGPTase inhibitor(s), may contain suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar and tragacanth, and mixtures thereof.
- suspending agents as, for example, ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar-agar and tragacanth, and mixtures thereof.
- Formulations of the pharmaceutical compositions of the invention for rectal or vaginal administration may be presented as a suppository, which may be prepared by mixing one or more compounds of the invention with one or more suitable nonirritating excipients or carriers comprising, for example, cocoa butter, polyethylene glycol, a suppository wax or a salicylate, and which is solid at room temperature, but liquid at body temperature and, therefore, will melt in the rectum or vaginal cavity and release the active inhibitor.
- suitable nonirritating excipients or carriers comprising, for example, cocoa butter, polyethylene glycol, a suppository wax or a salicylate, and which is solid at room temperature, but liquid at body temperature and, therefore, will melt in the rectum or vaginal cavity and release the active inhibitor.
- Formulations of the present invention which are suitable for vaginal administration also include pessaries, tampons, creams, gels, pastes, foams or spray formulations containing such carriers as are known in the art to be appropriate.
- Dosage forms for the topical or transdermal administration of a peptide or peptidomimetic of this invention include powders, sprays, ointments, pastes, creams, lotions, gels, solutions, patches and inhalants.
- the active compound may be mixed under sterile conditions with a pharmaceutically-acceptable carrier, and with any preservatives, buffers, oi propellants which may be required.
- the ointments, pastes, creams and gels may contain, in addition to an active GGPTase inhibitor, excipients, such as animal and vegetable fats, oils, waxes, paraffins, starch, tragacanth, cellulose derivatives, polyethylene glycols, silicones, bentonites, silicic acid, talc and zinc oxide, or mixtures thereof.
- Powders and sprays can contain, in addition to a compound of this invention, excipients such as lactose, talc, silicic acid, aluminum hydroxide, calcium silicates and polyamide powder, or mixtures of these substances.
- Sprays can additionally contain customary propellants, such as chlorofluorohydrocarbons and volatile unsubstituted hydrocarbons, such as butane and propane.
- Transdermal patches have the added advantage of providing controlled delivery of a compound of the present invention to the body.
- dosage forms can be made by dissolving or dispersing the peptidomimetic in the proper medium.
- Absorption enhancers can also be used to increase the flux of the drug across the skin. The rate of such flux can be controlled by either providing a rate controlling membrane or dispersing the peptidomimetic in a polymer matrix or gel.
- Opthalmic formulations are also contemplated as being within the scope of this invention.
- compositions of this invention suitable for parenteral administration comprise one or more peptides or peptidomimetics of the invention in combination with one or more pharmaceutically-acceptable sterile isotonic aqueous or nonaqueous solutions, dispersions, suspensions or emulsions, or sterile powders which may be reconstituted into sterile injectable solutions or dispersions just prior to use, which may contain antioxidants, buffers, bacteriostats, solutes which render the formulation isotonic with the blood of the intended recipient or suspending or thickening agents.
- aqueous and nonaqueous carriers examples include water, ethanol, polyols (such as glycerol, propylene glycol, polyethylene glycol, and the like), and suitable mixtures thereof, vegetable oils, such as olive oil, and injectable organic esters, such as ethyl oleate.
- polyols such as glycerol, propylene glycol, polyethylene glycol, and the like
- vegetable oils such as olive oil
- injectable organic esters such as ethyl oleate.
- Proper fluidity can be maintained, for example, by the use of coating materials, such as lecithin, by the maintenance of the required particle size in the case of dispersions, and by the use of surfactants.
- compositions may also contain adjuvants such as preservatives, wetting agents, emulsifying agents and dispersing agents. Prevention of the action of microorganisms may be ensured by the inclusion of various antibacterial and other antifungal agents, for example, paraben, chlorobutanol, phenol sorbic acid, and the like. It may also be desirable to include isotonic agents, such as sugars, sodium chloride, and the like into the compositions. In addition, prolonged absorption of the injectable pharmaceutical form may be brought about by the inclusion of agents which delay absorption such as aluminum monostearate and gelatin.
- the absorption of the drug in order to prolong the effect of a drug, it is desirable to slow the absorption of the drug from subcutaneous or intramuscular injection. This may be accomplished by the use of a liquid suspension of crystalline or amorphous material having poor water solubility. The rate of absorption of the drug then depends upon its rate of dissolution which, in turn, may depend upon crystal size and crystalline form. Alternatively, delayed absorption of a parenterally-administered drug form is accomplished by dissolving or suspending the drug in an oil vehicle.
- Injectable depot forms are made by forming microencapsuled matrices of the subject peptides or peptidomimetics in biodegradable polymers such as polylactide- polyglycolide. Depending on the ratio of drug to polymer, and the nature of the particular polymer employed, the rate of drug release can be controlled. Examples of other biodegradable polymers include poly(orthoesters) and poly( anhydrides). Depot injectable formulations are also prepared by entrapping the drug in liposomes or microemulsions which are compatible with body tissue. When the compounds of the present invention are administered as pharmaceuticals, to humans and animals, they can be given per se or as a pharmaceutical composition containing, for example, 0.1 to 99.5% (more preferably,
- the preparations of the present invention may be given orally, parenterally, topically, or rectally. They are of course given by forms suitable for each administration route. For example, they are administered in tablets or capsule form, by injection, inhalation, eye lotion, ointment, suppository, etc. administration by injection, infusion or inhalation; topical by lotion or ointment; and rectal by suppositories. Oral administration is preferred.
- parenteral administration and “administered parenterally” as used herein means modes of administration other than enteral and topical administration, usually by injection, and includes, without limitation, intravenous, intramuscular, intraarterial, intrathecal, intracapsular, intraorbital, intracardiac, intradermal, intraperitoneal, transtracheal, subcutaneous, subcuticular, intraarticulare. subcapsular, subarachnoid, intraspinal and intrasternal injection and infusion.
- peripheral administration and “administered peripherally” as used herein mean the administration of a compound, drug or other material other than directly into the central nervous system, such that it enters the patient's system and, thus, is subject to metabolism and other like processes, for example, subcutaneous administration.
- the GGPTase inhibitors useful in the subject method may be used in a suitable hydrated form, and/or the pharmaceutical compositions of the present invention, are formulated into pharmaceutically-acceptable dosage forms by conventional methods known to those of skill in the art.
- Actual dosage levels of the active ingredients in the pharmaceutical compositions of this invention may be varied so as to obtain an amount of the active ingredient which is effective to achieve the desired therapeutic response, e.g., antimycotic activity, for a particular patient, composition, and mode of administration, without being toxic to the patient.
- desired therapeutic response e.g., antimycotic activity
- the selected dosage level will depend upon a variety of factors including the activity of the particular GGPTase inhibitor employed, or the ester, salt or amide thereof, the route of administration, the time of administration, the rate of excretion of the particular compound being employed, the duration of the treatment, other drugs, compounds and/or materials used in combination with the particular inhibitor employed, the age, sex, weight, condition, general health and prior medical history of the patient being treated, and like factors well known in the medical arts.
- a physician or veterinarian having ordinary skill in the art can readily determine and prescribe the effective amount of the pharmaceutical composition required.
- the physician or veterinarian could start doses of the compounds of the invention employed in the pharmaceutical composition at levels lower than that required in order to achieve the desired therapeutic effect and gradually increase the dosage until the desired effect is achieved.
- a suitable daily dose of a potent GGPTase inhibitor e.g., having an EC 50 in the range of 1 mM to sub-nanomolar
- a suitable daily dose of a potent GGPTase inhibitor will be that amount of the compound which is the lowest dose effective to produce a therapeutic effect.
- Such an effective dose will generally depend upon the factors described above.
- intravenous, intracerebroventricular and subcutaneous doses of the compounds of this invention for a patient when used for the indicated antifungal effects, will range from about 0.0001 to about lOOOmg per kilogram of body weight per day, though preferably 0.5 to 300mg per kilogram.
- the effective daily dose of the active inhibitor may be administered as two. three, four, five, six or more sub-doses administered separately at appropriate intervals throughout the day, optionally, in unit dosage forms.
- the antifungal agent is formulated for oral administration, as for example in the form of a solid tablet, pill, capsule, caplet or the like (collectively hereinafter “tablet") or an aqueous solution or suspension.
- tablette a solid tablet, pill, capsule, caplet or the like
- the tablets are preferably formulated such that the amount of antifungal agent (or antifungal agents) provided in 20 tablets, if taken together, would provide a dose of at least the median effective dose (ED50), e.g., the dose at which at least 50% of individuals exhibited the quantal effect of inhibition of fungal cell growth or protection (e.g., a statistically significant reduction in infection).
- ED50 median effective dose
- the tablets are formulated such that the total amount of antifungal agent (or antifungal agents) provided in 10, 5, 2 or 1 tablets would provide at least an ED50 dose to a patient (human or non-human mammal).
- the amount of antifungal agent (or antifungal agents) provided in 20, 10, 5 or 2 tablets taken in a 24 hour time period would provide a dosage regimen providing, on average, a mean plasma level of the antifungal agent(s) of at least the ED50 concentration (the concentration for 50% of maximal effect of, e.g., inhibiting fungal cell growth), though preferably less than 100 times the ED50, and even more preferably less than 10 or 5 times the ED50.
- a single dose of tablets (1-20 tablets) provides about .25mg to 1250mg of an antifungal agent(s).
- the antifungal agents can be formulated for parenteral administration, as for example, for subcutaneous, intramuscular or intravenous injection, e.g., the antifungal agent can be provided in a sterile solution or suspension (collectively hereinafter "injectable solution").
- injectable solution is preferably formulated such that the amount of antifungal agent (or antifungal agents) provided in a 200cc bolus injection would provide a dose of at least the median effective dose, though preferably less than 100 times the ED50, and even more preferably less than 10 or 5 times the ED50.
- the injectable solution is formulated such that the total amount of antifungal agent (or antifungal agents) provided in 100, 50, 25, 10, 5, 2.5, or 1 cc injections would provide an ED50 dose to a patient, and preferably less than 100 times the ED50, and even more preferably less than 10 or 5 times the ED50.
- the amount of antifungal agent (or antifungal agents) provided in a total volume of l OOcc, 50, 25, 5 or 2cc to be injected at least twice in a 24 hour time period would provide a dosage regimen providing, on average, a mean plasma level of the antifungal agent(s) of at least the ED50 concentration, though preferably less than 100 times the ED50, and even more preferably less than 10 or 5 times the ED50.
- a single dose injection provides about .25mg to 1250mg of antifungal agent.
- the antifungal agent can be provided in a sterile dilute solution or suspension (collectively hereinafter "i.v. injectable solution”).
- i.v. injectable solution is preferably formulated such that the amount of antifungal agent (or antifungal agents) provided in a IL solution would provide a dose, if administered over 15 minutes or less, of at least the median effective dose, though preferably less than 100 times the ED50, and even more preferably less than 10 or 5 times the ED 50. More preferably, the i.v.
- injectable solution is formulated such that the total amount of antifungal agent (or antifungal agents) provided in IL solution administered over 60, 90, 120 or 240 minutes would provide an ED50 dose to a patient, though preferably less than 100 times the ED50, and even more preferably less than 10 or 5 times the ED50.
- a single i.v. "bag” provides about .25mg to 5000mg of antifungal agent per liter i.v. solution, more preferably .25mg to 2500mg, and even more preferably .25mg to 1250mg.
- the preferred antifungal agent pharmaceutical preparation would provide a dose less than the ED50 for modulation of FPTase and/or GGPTase activity in the host, more preferably at least 1 order of magnitude less, more preferably at least 2, 3 or 4 orders magnitude less.
- An ED50 dose, for a human, is based on a body weight of from lOlbs to 2501bs, though more preferably for an adult in the range of 100 to 250 lbs.
- Potential antifungal agents can be assessed for ED50 values for both antifungal activity, as well as activity arising from inhibition of mammalian FPTase or GGPTase activity in a host organism using any of a number of well known techniques in the art.
- GGPTase inhibitor(s) selected for use in the subject method will be orders of magnitude better inhibitors of a fungal GGPTase than a mammalian GGPTase, and/or have greater membrane permeance through a fungal cell wall than a mammalian cell membrane.
- candidate inhibitors of GGPTase will be screened for activity in appropriate fungal assays.
- Compounds that display desired characteristics in a given assay may serve as lead compounds for the discovery of more potent inhibitors.
- compounds active against fungal GGPTase will be screened independently against mammalian GGPTases.
- the present invention is not limited in terms of the methods relied upon for pinpointing potent inhibitors.
- Compounds selected based on their activity in vitro will be screened subsequently in vivo.
- a candidate GGPTase inhibitor can be tested in an assay comprising a prenylation reaction system that includes a fungal geranylgeranyl protein transferase (GGPTase), a fungal GTPase protein, or a portion thereof, which serves as a prenylation target substrate, and an activated geranylgeranyl moiety which can be covalent attached to the prenylation substrate by the GGPTase.
- the level of prenylation of the target substrate brought about by the system is measured in the presence and absence of a candidate agent, and a statistically significant decrease in the level prenylation is indicative of a potential anti-fungal activity for the candidate agent.
- the level of prenylation of the GTPase target protein can be measured by determining the actual concentration of substrate: geranylgeranyl conjugates formed; or inferred by detecting some other quality of the target substrate affected by prenylation, including membrane localization of the target.
- the present assay comprises an in vivo prenylation system, such as a cell able to conduct the target substrate through at least a portion of a geranylgeranyl conjugation pathway.
- the present assay comprises an in vitro prenylation system in which at least the ability to transfer isoprenoids to the GTPase target protein is constituted. Still other embodiments provide assay formats which detect protein-protein interaction between the GGPTase and a target protein, rather than enzymatic activity er se.
- a reaction mixture is generated to include a fungal GTPase polypeptide, compound(s) of interest, and a "target polypeptide", e.g., which includes GGPTase activities such as GGPTase I.
- GGPTase activities such as GGPTase I.
- Detection and quantification of the enzymatic conversion of the fungal GTPase, or the formation of complexes containing the fungal GTPase protein provide a means for determining a compound's efficacy at inhibiting (or potentiating) the complex bioactivity of the GTPase.
- the efficacy of the compound can be assessed by generating dose response curves from data obtained using various concentrations of the test compound.
- a control assay can also be performed to provide a baseline for comparison.
- the subject drug screening assay comprises a prenylation system, e.g. a reaction mixture which enzymatically conjugates isoprenoids to a target protein, which is arranged to detect inhibitors of the prenylation of a Rho-like GTPase with a geranylgeranyl group.
- a prenylation system e.g. a reaction mixture which enzymatically conjugates isoprenoids to a target protein, which is arranged to detect inhibitors of the prenylation of a Rho-like GTPase with a geranylgeranyl group.
- a cell-free prenylation system one or more cell lysates including a fungal GGPTase, a fungal Rho-like GTPase (or substrate analog thereof), and an activated geranylgeranyl group are incubated with the test compound and the level of prenylation of the Rho- like GTPase substrate is detected.
- Lysates can be derived from cells expressing one or more of the relevant proteins, and mixed appropriately (or split) where no single lysate contains all the components necessary for generating the prenylation system.
- one or more of the components, especially the substrate target are recombinantly produced in a cell used to generate a lysate, or added by spiking a lysate mixture with a purified or semi-purified preparation of the substrate.
- a Rhol -GST fusion protein the ability to carefully control reaction conditions with respect to concentrations of reactants; and where targets are derived from fungal pathogens, the ability to work in a non-pathogenic system by recombinantly or synthetically by producing components from the pathogen for constituting the prenylation system.
- the prenylates can be derived from any number of cell types, ranging from bacterial cells to yeast cells to cells from metazoan organisms including insects and mammalian cells.
- a fungal prenylation system can be reconstituted by mixing cell lysates derived from insect cells expressing fungal GGPTase subunits cloned into baculoviral expression vectors.
- the exemplary GGPTase-I expression vectors described below can be recloned into baculoviral vectors (e.g. pVL vectors), and recombinant GGPTase-I produced in transfected Spodoptera fiingiperda cells.
- the level of activity can be assessed by enzymatic activity, or by quantitating the level of expression by detecting, e.g., an exogenous tag added to the recombinant protein.
- Substrate and activated geranylgeranyl diphosphate can be added to the lysate mixtures.
- the transfected cells can be cells which lack an endogenous GGPTase activity, or the substrate can be chosen to be particularly sensitive to prenylation by the exogenous fungal GGPTase relative to any endogenous activity of the cells.
- the prenylation system comprises a reconstituted protein mixture of at least semi-purified proteins.
- the proteins utilized in the reconstituted mixture have been previously separated from other cellular proteins.
- the proteins involved in conjugation of geranylgeranyl moieties to a target protein, together with the target protein are present in the mixture to at least 50% purity relative to all other proteins in the mixture, and more preferably are present at 90-95%) purity.
- the reconstituted protein mixture is derived by mixing highly purified proteins such that the reconstituted mixture substantially lacks other proteins which might interfere with or otherwise alter the ability to measure specific prenylation rates of the target GTPase substrate.
- prenylation systems derived from purified proteins may have certain advantages over cell lysate based assays. Unlike the reconstituted protein system, the orenylation activity of a cell-lysate may not be readily controlled. Measuring kinetic parameters is made tedious by the fact that cell lysates may be inconsistent from batch to batch, with potentially significant variation between preparations. In evidence indicates that prenyltransferases have the ability to cross-prenylate CAAX-related sequences, so that farnesyl transferase present in a lysate may provide an unwanted kinetic parameter.
- GDI guanine nucleotide dissociation inhibitor
- the purified protein mixture includes a purified preparation of the substrate polypeptide and a geranylgeranyl isoprenoid (or analog thereof) under conditions which drive the conjugation of the two molecules.
- the mixture can include a fungal GGPTase I complex including RAM2 and CDC43 subunits, a geranylgeranyl diphosphate, a divalent cation, and a substrate polypeptide, such as may be derived from Rhol .
- Prenylation of the target regulatory protein via an in vitro prenylation system in the presence and absence of a candidate inhibitor, can be accomplished in any vessel suitable for containing the reactants. Examples include microtitre plates, test tubes, and micro-centrifuge tubes. In such embodiments, a wide range of detection means can be practiced to score for the presence of the prenylated protein.
- the products of a prenylation system are separated by gel electrophoresis, and the level of prenylated substrate polypeptide assessed, using standard electrophoresis protocols, by measuring an increase in molecular weight of the target substrate that corresponds to the addition of one or more geranylgeranyl moieties.
- one or both of the target substrate and geranylgeranyl group can be labeled with a radioisotope such as 35 S, 1 C, or 3 H, and the isotopicaliy labeled protein bands quantified by autoradio graphic techniques Standardization of the assay samples can be accomplished, for instance, by adding known quantities of labeled proteins which are not themselves subject to prenylation or degradation under the conditions which the assay is performed.
- a radioisotope such as 35 S, 1 C, or 3 H
- Standardization of the assay samples can be accomplished, for instance, by adding known quantities of labeled proteins which are not themselves subject to prenylation or degradation under the conditions which the assay is performed.
- other means of detecting electrophoretically separated proteins can be employed to quantify the level of prenylation of the target substrate, including immunoblot analysis using antibodies specific for either the target substrate or geranylgeranyl epitopes.
- the antibody can be replaced with another molecule able to bind one of either the target substrate or the isoprenoid.
- one embodiment of the present assay comprises the use of a biotinylated target substrate in the conjugating system.
- biotinylated GGPTase substrates have been described in the art (c.f Yokoyama et al. (1995) Biochemistry 34: 1344-1354).
- the biotin label is detected in a gel during a subsequent detection step by contacting the electrophoretic products (or a blot thereof) with a streptavidin-conjugated label, such as a streptavidin linked fluorochrome or enzyme, which can be readily detected by conventional techniques.
- a reconstituted protein mixture is used (rather than a lysate) as the conjugating system
- prenylated and unprenylated substrate can be separated by other chromatograpbic techniques, and the relative quantities of each determined.
- HPLC can be used to quantitate prenylated and unprenylated substrate (Pickett et al. (1995) Analytical Biochem 225:60-63), and the effect of a test compound on that ratio determined.
- an immunoassay or similar binding assay is used to detect and quantify the level of prenylated target substrate produced in the prenylation system.
- Many different immunoassay techniques are amenable for such use and can be employed to detect and quantitate the conjugates.
- the wells of a microtitre plate (or other suitable solid phase) can be coated with an antibody which specifically binds one of either the target substrate or geranylgeranyl groups. After incubation of the prenylation system with and without the candidate agent, the products are contacted with the matrix bound antibody, unbound material removed by washing, and prenylated conjugates of the target substrate specifically detected.
- a detectable anti-geranylgeranyl antibody can be used to score for the presence of prenylated target substrate on the matrix.
- the prenylation substrate can be immobilized throughout the reaction, such as by cross-linking to activated polymer, or sequestered to the well walls after the development of the prenylation reaction.
- a Rho-like GTPase e.g.
- a fungal Rhol, Rho2, Cdc42 or Rsrl/Budl is cross-linked to the polymeric support of the well, the prenylation system set up in that well, and after completion, the well washed and the amount of geranylgeranyl sidechains attached to the immobilized GTPase detected.
- wells of a microtitre plate are coated with streptavidin and contacted with the developed prenylation system under conditions wherein a biotinylated substrate binds to and is sequestered in the wells. Unbound material is washed from the wells, and the level of prenylated target substrate is detected in each well.
- the thioether linkage of the isoprenoid with the substrate peptide sequence can be cleaved by treatment with methyl iodide
- the released geranylgeranyl products can be detected, e g , by radioactivity, HPLC, or other convenient format
- geranylgeranyl derivatives include detectable labels which do not interfere greatly with the conjugation of that group to the target substrate
- the assay format provides fluorescence assay which relies on a change in fluorescent activity of a group associated with a GGPTase substrate to assess test compounds against a fungal GGPTase
- GGPTase-I activity can be measured by a modified version of the continuous fluorescence assay described for farnesyl transferases (Cassidy et al , (1985) Methods Enzymol 250 30-43, Pickett et al (1995) Analytical Biochem 225 60-63, and Stirtan et al (1995) Aich Biochem Biophys 321 182-190)
- dansyl-Gly-Cys-Ile-Ue-Leu (d-GCIIL) and the geranylgeranyl diphosphate are added to assay buffer, along with the test agent
- the geranylgeranyl transferase activity against a particular substrate can be detected in the subject assay by using a phosphocellulose paper absorption system (Roskoski et al (1994) Analytical Biochem 222 275-280), or the like
- a phosphocellulose paper absorption system Rosham et al (1994) Analytical Biochem 222 275-280
- several basic residues can be added, preferably to the ammo-terminal side of the CAAX target sequence of the peptide, to produce a peptide with a minimal minimum charge of +2 or +3 at pH less than 2
- the transfer of the [H 3 ] geranylgeranyl group from [H 3 ] -geranylgeranyl pyrophosphate to KLKCAIL or other acceptor peptides can be measured under conditions similar to the farnesyl transferase reactions desc ⁇ bed by Reiss et al (Reiss)
- samples are applied to Whatman P81 phosphocellulose paper strips. After the liquid permeates the paper (a few seconds), the strips are washed in ethanol/phosphoric acid (prepared by mixing equal volumes of 95% ethanol and 75 mM phosphoric acid) to remove unbound isoprenoids The samples are air dried, and radioactivity can be measured by liquid scintillation spectrometry. Background values are obtained by using reaction mixture with buffer in place of enzyme.
- compounds for use in the subject method can be detected using a screening assay derived to include a whole cell expressing a fungal GTPase protein, along with a GGPTase.
- the reagent cell is a non-pathogenic cell which has been engineered to express one or more of these proteins from recombinant genes cloned from a pathogenic fungus.
- non-pathogenic fungal cells such as S. cerevisae, can be derived to express a Rho- like GTPase from a fungal pathogen such as Candida albicans.
- the reagent cell can be manipulated, particularly if it is a yeast cell, such that the recombinant gene(s) complement a loss-of-function mutation to the homologous gene in the reagent cell.
- a non-pathogenic yeast cell is engineered to express a Rho-like GTPase, e.g. Rhol, and at least one of the subunits of a GGPTase, e.g. RAM2 and/or Cdc43, derived from a fungal protein.
- a Rho-like GTPase e.g. Rhol
- GGPTase e.g. RAM2 and/or Cdc43
- One salient feature to such reagent cells is the ability of the practitioner to work with a non- pathogenic strain rather than the pathogen itself. Another advantage derives from the level of knowledge, and available strains, when working with such reagent cells as S. cerevisae.
- the ability of a test agent to alter the activity of the GTPase protein can be detected by analysis of the cell or products produced by the cell.
- agonists and antagonists of the GTPase biological activity can be detected by scoring for alterations in growth or viability of the cell.
- Other embodiments will permit inference of the level of GTPase activity based on, for example, detecting expression of a reporter, the induction of which is directly or indirectly dependent on the activity of a Rho-like GTPase.
- General techniques for detecting each are well known, and will vary with respect to the source of the particular reagent cell utilized in any given assay.
- quantification of proliferation of cells in the presence and absence of a candidate agent can be measured with a number of techniques well known in the art, including simple measurement of population growth curves.
- turbidimetric techniques i.e. absorption transmission of light of a given wavelength through the sample
- the reagent cell is a yeast cell
- measurement of absorption of light at a wavelength between 540 and 600 nm can provide a conveniently fast measure of cell growth.
- ability to form colonies in solid medium e.g. agar
- solid medium e.g. agar
- a GTPase substrate protein such as a histone
- a fasion protein which permits the substrate to be isolated from cell lysates and the degree of acetylation detected.
- visual inspection of the morphology of the reagent cell can be used to determine whether the biological activity of the targeted GTPase protein has been affected by the added agent.
- visual inspection of the morphology of the reagent cell can be used to determine whether the biological activity of the targeted GTPase protein has been affected by the added agent.
- the ability of an agent to create a lytic phenotype which is mediated in some way by a recombinant GTPase protein can be assessed by visual microscopy.
- test agent on reagent cell can be assessed by measuring levels of expression of specific genes, e.g., by reverse transcription-PCR.
- Another method of scoring for effect on GTPase activity is by detecting cell-type specific marker expression through immunofluorescent staining. Many such markers are known in the art, and antibodies are readily available.
- the target cell in order to enhance detection of cell lysis, can be provided with a cytoplasmic reporter which is readily detectable, either because it has "leaked” outside the cell, or substrate has “leaked” into the cell, by perturbations in the cell wall.
- Preferred reporters are proteins which can be recombinantly expressed by the target cell, do not interfere with cell wall integrity, and which have an enzymatic activity for which chromogenic or fluorogenic substrates are available.
- a fungal cell can be constructed to recombinantly express the ⁇ -galactosidase gene from a construct (optionally) including an inducible promoter. At some time prior to contacting the cell with a test agent, expression of the reporter protein is induced.
- Agents which inhibit prenylation of a Rho-like GTPase in the cell, or the subsequent involvement of a Rho-like GTPase in cell wall integrity can be detected by an increase in the reporter protein activity in the culture supernatant or from permeation of a substrate in the cell.
- ⁇ -galactosidase activity can be scored using such colorimetric substrates as 5-bromo-4-chloro-3-indolyl- ⁇ -D-galactopyranoside or fluorescent substrates such as methylumbelliferyl- ⁇ -D-galactopyranoside. Permeation of the substrate into the cell, or leakage of the reporter into the culture media, is thus readily detectable.
- the membrane localization resulting from prenylation of the fungal GTPase can be exploited to generate the cell-based assay.
- the subject assay can be derived with a reagent cell having: (/) a reporter gene construct including a transcriptional regulatory element which can induce expression of the reporter upon interaction of the transcriptional regulatory protein portion of the above fusion protein.
- a gal4 protein can be fused with a Rhol polypeptide sequence which includes the CAAX prenylation target.
- prenylation of the fusion protein will result in partitioning of the fusion protein at the cell surface membrane. This provides a basal level of expression of the reporter gene construct.
- partitioning is lost and, with the concomitant increase in nuclear concentration of the protein, expression from the reporter construct is increased.
- the cell is engineered such that inhibition of the GGPTase activity does not result in cell lysis.
- mutation of the C-terminus of Rhol and cdc42 can provide proteins which are targets of farsenyl transferase rather than geranylgeranyl transferase.
- such mutants can be used to render the GGPTase I activity dispensable.
- a reporter gene construct and an expression vector for the GGPTase substrate/transcription factor fusion protein in such cells as YOT35953 cells generates a cell whose viability vis-a-vis the GGPTase activity is determined by the reporter construct, if at all, rather than by prenylation of an endogenous Rho-like GTPase by the GGPTase.
- the reporter gene product can be derived to have no effect on cell viability, providing for example another type of detectable marker (described, infra).
- Such cells can be engineered to express an exogenous GGPTase activity in place of an endogenous activity, or can rely on the endogenous activity.
- the Call mutant YOT35953 cell can be further manipulated to express a Call homolog from, e.g., a fungal pathogen or a mammalian cell.
- the leakage assay can be utilized to detect expression of the reporter protein.
- the reporter gene can encode ⁇ - galactosidase, and inhibition of the GGPTases activity scored for by the presence of cells which take up substrate due to loss of cell wall integrity, and convert substrate due to the expression of the reporter gene.
- the reporter gene is a gene whose expression causes a phenotypic change which is screenable or selectable. If the change is selectable, the phenotypic change creates a difference in the growth or survival rate between cells which express the reporter gene and those which do not. If the change is screenable, the phenotype change creates a difference in some detectable characteristic of the cells, by which the cells which express the marker may be distinguished from those which do not.
- the marker gene is coupled to GTPase-dependent activity, be it membrane association, or a downstream signaling pathway induced by a GTPase complex, so that expression of the marker gene is dependent on the activity of the GTPase.
- This coupling may be achieved by operably linking the marker gene to a promoter responsive to the therapeutically targeted event.
- GTPase-responsive promoter indicates a promoter which is regulated by some product or activity of the fungal GTPase.
- transcriptional regulatory sequences responsive to signals generated by PKC/GTPase, GS/GTPase and or other GTPase complexes, or to signals by other proteins in such complexes which are interrupted by GTPase binding can be used to detect function of Rho-like GTPases such as Rhol and cdc42.
- suitable positively selectable (beneficial) genes include the following: URA3, LYS2, HIS3, LEU2, TRP I; ADEI.2, 3.4,5, 7,8; ARGl, 3, 4, 5,
- IGP dehydratase The imidazoleglycerol phosphate dehydratase (IGP dehydratase) gene (HIS 3) is preferred because it is both quite sensitive and can be selected over a broad range of expression levels.
- the cell is auxotrophic for histidine (requires histidine for growth) in the absence of activation. Activation of the gene leads to synthesis of the enzyme and the cell becomes prototrophic for histidine (does not require histidine). Thus the selection is for growth in the absence of histidine. Since only a few molecules per cell of IGP dehydratase are required for histidine prototrophy, the assay is very sensitive.
- the marker gene may also be a screenable gene.
- the screened characteristic may be a change in cell morphology, metabolism or other screenable features.
- Suitable markers include beta-galactosidase (Xgal, C ⁇ FDG, Salmon-gal, Magenta-Gal (latter two from Biosynth Ag)), alkaline phosphatase, horseradish peroxidase, exo-glucanase (product of yeast exbl gene; nonessential, secreted); luciferase; bacterial green fluorescent protein; (human placental) secreted alkaline phosphatase (SEAP); and chloramphenicol transferase (CAT).
- beta-galactosidase Xgal, C ⁇ FDG, Salmon-gal, Magenta-Gal (latter two from Biosynth Ag)
- alkaline phosphatase horseradish peroxidase
- exo-glucanase product of yeast exbl gene; nonessential
- a preferred screenable marker gene is ⁇ -galactosidase; yeast cells expressing the enzyme convert the colorless substrate Xgal into a blue pigment.
- Call-1 cells or the like e.g., impaired for certain GGPTase activities, are suitable for use in assay to detect GS inhibitors, as such cells are more sensitive to the effects of GS inhibitors.
- the benefits to enhanced sensitivity include speedier development of assay readouts, and the further prejudicing of the assay towards GS inhibitors rather than other targets which may not provide cytotoxicity.
- the latter can provide the ability to identify potential hits which may not themselves be potent GS inhibitors, but which can be manipulated, e.g., by combinatorial chemistry approaches, to provide potent and specific GS inhibitors.
- yet another embodiment of the subject assay utilizes a side-by-side comparison of the effect of a test agent on (i) a cell which prenylates a Rho-like GTPase by adding geranylgeranyl moieties, and (ii) a cell which prenylates an equivalent Rho-like GTPase by adding farnesyl moieties.
- the assay makes use of the ability to suppress GGPTase I defects in yeast by altering the C-terminal tail of Rhol and cdc42 to become substrate targets of farnesyl transferase (see Ohya et al., supra).
- the assay is arranged by providing a yeast cell in which the target Rho-like GTPases is prenylated by a GGPTase activity of the cell. Both the GGPTase and GTPase can be endogenous to the "test" cell, or one or both can be recombinantly expressed in the cell. The level of prenylation of the GTPase is detected, e.g., cell lysis or other means described above.
- test compound to inhibit the addition of geranylgeranyl groups to the GTPase in the first cell is compared against the ability of test compound to inhibit the farnesylation of the GTPase in a control cell.
- the "control" cell is preferably identical to the test cell, with the exception that the targeted GTPase(s) are mutated at their CAAX sequence to become substrates for FPTases rather than GGPTases.
- Agents which inhibit prenylation in the test cell but not the control cell are selected as potential antifungal agents. Such differential screens can beakily sensitive to inhibitors of GGPTase I prenylation of Rho- like GTPases.
- the test cell is derived from the S.
- cerivisae cell YOT35953 (Ohya et al., supra) or the like which is defective in GGPTase subunit cdc43.
- the cell is then engineered with a cdc43 subunit from a fungal pathogen such as Candida albicans to generate the test cell, and additionally with the mutated Rho-like GTPases to generate the control cell.
- assays can be used to identify compounds that have therapeutic indexes more favorable than such antifungal.
- antifungal agents can be identified by the present assays which inhibit proliferation of yeast cells or other lower eukaryotes, but which have a substantially reduced effect on mammalian cells, thereby improving therapeutic index of the drug as an anti- mycotic agent.
- differential screening assays can be used to exploit the difference in protein interactions and/or catalytic mechanism of mammalian and fungal GGPTases in order to identify agents which display a statistically significant increase in specificity for inhibiting the fungal prenylation reaction relative to the mammalian prenylation reaction.
- lead compounds which act specifically on the prenylation reaction in pathogens, such as fungus involved in mycotic infections can be developed.
- the present assays can be used to screen for agents which may ultimately be useful for inhibiting the growth of at least one fungus implicated in such mycosis as candidiasis, aspergillosis, mucormycosis, blastomycosis, geotrichosis, cryptococcosis, chromoblastomycosis, coccidioidomycosis, conidiosporosis, histoplasmosis, maduromycosis, rhinosporidosis, nocaidiosis, para-actinomyc ⁇ sis, penicilliosis, monoliasis, or sporotrichosis
- the present assay can comprise comparing the relative effectiveness of a test compound on inhibiting the prenylation of a mammalian GTPase protein with its effectiveness towards inhibiting the prenylation of a GTPase from a yeast selected from the group consist
- the present assay can be used to identify anti-fungal agents which may have therapeutic value in the treatment of aspergillosis by selectively targeting, relative to human cells, GTPase homologs from yeast such as Aspergillus fumigatus, Aspergillus ⁇ av s, Aspergillus niger, Aspergillus nidulans, or Aspergillus teireus.
- yeast such as Aspergillus fumigatus, Aspergillus ⁇ av s, Aspergillus niger, Aspergillus nidulans, or Aspergillus teireus.
- the mycotic infection is mucormycosis
- the GTPase system to be screened can be derived from yeast such as Rhizopus arrhizus, Rhizopus oryzae, Absidia corymbifera, Absidia ramosa, or Mitcor pusillus.
- Sources of other screening systems include the pathogen Pneumocystis carinii, and plant pathogens, such as Venturia inaequalis, Mycosphaerella musicola, Pyricularia oryzae, Cercospora sp., Rhizoctonia solani, Fusarium sp., Sclerotinia homoeocarpa, Phytophthora infestans, Puccinia sp., and Erysiphe graminis. III. Exemplification
- R2R4NH EDC, HOBt, DIEA. CH2CI2 or DMF 20 60) R2R4NH, HBTU, HOBt, DIEA, CH2CI2 or DMF
- Fmoc-1-Nal-Leu-O-Wang Resin (2) 300 mg (0 72 mmol/g) of Fmoc-Leu-O-Wang resin in an Iron MacroKan was treated with 20% pipe ⁇ dine/DMF solution for 35 min
- Fmoc-AA-1-Nal-Leu-O-Wang Resin (3) The resin was treated with 20% 30 pipe ⁇ dine/DMF solution for 35 min The mixture was removed filtration, and the resin was again treated with 20% pipe ⁇ dine/DMF solution for 35 min The mixture was removed and the resin washed twice with DMF, three times with 1 1 methanol/dichloromethane, three times with dichloromethane, and then d ⁇ ed under vacuum The resin was treated with 2 5 eq of Fmoc-AA-OH, 3 0 eq of EDC, 3 0 eq 35 of HOBT, 3 0 eq of DIEA and 20 mL of DMF overnight The mixture was removed and the resin washed twice with DMF, three times with 1 1 methanol/dichloromethane, three times with dichloromethane, and then dried under vacuum
- the resin was treated with 2 5 eq of Boc(Tr)Cys-OH, 3 0 eq of EDC, 3 0 eq of HOBT, 3.0 eq of DIEA and 20 mL of DMF overnight. The mixture was removed and the resin washed twice with DMF, three times with 1 : 1 methanol/dichloromethane, three times with dichloromethane, and then dried under vacuum.
- Cys-AA-1-Nal-Leu (5) The resin was treated with 13.5 mL of 1 : 1 :0.1 mixture of TFA, dichloromethane and triethylsilane for 35 min. The mixture was removed via filtration and the resin treated again treated with 13.5 mL of 1 : 1 :0.1 mixture of TFA, dichloromethane and triethylsilane for 35 min. The mixture was removed via filtration and the combined deprotection mixtures were evaporated under vacuum. The resulting residue was triturated with ether and dried to a fine powder under vacuum.
- Hydantoin 48 120 mg was dissolved in CH 2 CI2 (4 mL). To this solution was added TFA (4 mL) followed by Et 3 SiH (0.1 mL). The reaction mixture was stirred at room temperature for 2h. The solvents were removed under reduced pressure. The residue was triturated with diethyl ether. The resulting solid was filtered, washed with ether and dried under vacuum to give 49 (59 mg).
- Compound 57 A solution of Boc-piperidine 56 in (1 :1) CH2CI2/TFA was stirred at room temperature for lh. The solvents were removed under reduced pressure. The residue was dissolved in methylene chloride and poured into 2M sodium carbonate solution. The aqueous layer was extracted with methylene chloride. The organic extracts were dried and concentrated to give amine 57.
- Compound 58 To a solution of amine 57 in methylene chloride was added S-Tr-N- Boc cysteine (1.2 equiv), followed by DIEA (1.5 equiv), HBTU (1.5 equiv) and HOBt (1.5 equiv).
- the reaction mixture was stirred at room temperature for 15h and poured into saturated sodium bicarbonate solution.
- the aqueous layer was extracted with methylene chloride.
- the organic extracts were dried and concentrated.
- the crude product was purified by silica gel chromatography (30-50% ethyl acetate/hexane) to give 58.
- 53a 1HNMR(300 MHz, CD 3 OD) ⁇ (ppm) 7 2-7 5 (m, 5H), 4 4-4 6 (m, 2H), 3 8 (dd, IH), 3 5 (dd, IH), 3 1-3 4 (m, IH), 2 9 (abq, 2H), 2 5-2 7 (m, 2H), 2 0-2 2 (m, IH), 1 7-1 9 (m, IH), 1 5-1 7 (m, IH), 0 7-0 9 (m, 6H) 53b: 1HNMR(300 MHz, CD 3 OD) ⁇ (ppm) 7 8 (m, IH), 7 1-7 5 (m, 12H), 6 9 (d, IH), 4 5 (d, IH), 4 3 (m, 3H), 3 7 (t, IH), 3 5 (m, IH), 2 9 - 3 3 (m, 4H), 2 8 (m, IH), 2 5 (m, 2H), 2 0 (m, 2H)
- 53bb 1 HNMR(300 MHz, CD3OD) ⁇ (ppm) 8 1-8 2 (m, IH), 7 0-7 5 (m, 10H), 20 4 5 (dd, IH), 4 2-4 4 (m, 3H), 4 0-4 1 (m, IH), 3 7-3 9 (m, IH), 3 4-3 6 (m, IH),
- the compounds of the present invention are amenable to combinatorial chemistry and other parallel synthesis schemes (see, for example, PCT WO 94/08051)
- the result is that large libraries of related compounds, e g., a variegated library of compounds represented by formula I above, can be screened rapidly in high throughput assays in order to identify potential antifungal lead compounds, as well as 25 to refine the specificity, toxicity, and/or cytotoxic-kinetic profile of a lead compound
- simple turbidimetric assays e.g , measuring the A ⁇ n °f a culture), or spotting compounds on fungal lawns, can be used to screen a library of the subject compounds for those having inhibitory activity toward a particular fungal strain
- a combinatorial library for the purposes of the present 30 invention is a mixture of chemically related compounds which may be screened together for a desired property
- the preparation of many related compounds in a single reaction greatly reduces and simplifies the number of screening processes which need to be carried out Screening for the appropnate physical properties can be done by conventional methods
- the substrate aryl groups used in the combinatorial reactions can be diverse in terms of the core aryl moiety, e.g., a variegation in terms of the ring structure, and/or can be varied with respect to the other substituents
- a library of candidate antifungal diversomers can be synthesized utilizing a scheme adapted to the techniques described in the Still et al PCT publication WO 94/08051, e g , being linked to a oofymer bead by a hydrolyzable or photolyzable group e , located at one of the positions of the candidate antifungals or a substituent of a synthetic intermediate
- the library is synthesized on a set of beads, each bead including a set of tags identifying the particular diversomer on that bead
- the bead library can then be 'plated' on a lawn of fungi for which an inhibitor is sought
- the diversomers can be released from the bead, e g , by hydrolysis Beads surrounded by areas of no, or diminished fungal growth e g , a "halo", can be selected and their tags can be ' read' to establish the identity of the particular diversomer
- ⁇ gro ⁇ ving trend in the field of combinatorial chemistry is to exploit the sensitivity of techniques such as mass spectrometry (MS), for example which can be used to characterize sub-femtomolar amounts of a compound, and to directly determine the chemical constitution of a compound selected from a combinatorial library
- MS mass spectrometry
- the library is provided on an insoluble support matrix
- discrete populations of compounds can be first released from the support and characterized by MS
- MS techniques as MALDI can be used to release a compound from the matrix, particularly where a labile bond is used originally to tether the compound to the matrix
- a bead selected from a library can be irradiated in a MALDI step in order to release the diversomer from the matrix, and ionize the diversomer for MS analysis
- the libraries of the subject method can take the multipin library format.
- Geysen and co-workers introduced a method for generating compound libraries by a parallel synthesis on polyacrylic acid-grated polyethylene pins arrayed in the microtitre plate format.
- the Geysen technique can be used to synthesize and screen thousands of compounds per week using the multipin method, and the tethered compounds may be reused in many assays.
- Appropriate linker moieties can also been appended to the pins so that the compounds may be cleaved from the supports after synthesis for assessment of purity and further evaluation (c.f, Bray et al.
- a variegated library of compounds can be provided on a set of beads utilizing the strategy of divide-couple-recombine (see, for example, Houghten (1985) PNAS 82:5131-5135; and U.S. Patents 4,631,211; 5,440,016; 5,480,971).
- the beads are divided into separate groups equal to the number of different substituents to be added at a particular position in the library, the different substituents coupled in separate reactions, and the beads recombined into one pool for the next iteration.
- the divide-couple-recombine strategy can be carried out using an analogous approach to the so-called "tea bag” method first developed by Houghten, where compound synthesis occurs on resin sealed inside porous polypropylene bags (Houghten et al. ( 1986) PNAS 82:5131-5135). Substituents are coupled to the compound-bearing resins by placing the bags in appropriate reaction solutions, while all common steps such as resin washing and deprotection are performed simultaneously in one reaction vessel. At the end of the synthesis, each bag contains a single compound.
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL14068699A IL140686A0 (en) | 1998-07-15 | 1999-07-15 | Compositions and methods for inhibiting fungal growth |
JP2000559877A JP2002520372A (en) | 1998-07-15 | 1999-07-15 | Compositions and methods for inhibiting fungal growth |
KR1020017000639A KR20010083115A (en) | 1998-07-15 | 1999-07-15 | Compositions and methods for inhibiting fungal growth |
AU51075/99A AU5107599A (en) | 1998-07-15 | 1999-07-15 | Compositions and methods for inhibiting fungal growth |
CA002335381A CA2335381A1 (en) | 1998-07-15 | 1999-07-15 | Use of inhibitors of prenyltransferases for inhibiting fungal growth |
EP99935639A EP1096925A2 (en) | 1998-07-15 | 1999-07-15 | Use of inhibitors of prenyltransferases for for inhibiting fungal growth |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US11584698A | 1998-07-15 | 1998-07-15 | |
US09/115,846 | 1998-07-15 | ||
US09/172,845 US6423519B1 (en) | 1998-07-15 | 1998-10-15 | Compositions and methods for inhibiting fungal growth |
US09/172,845 | 1998-10-15 |
Publications (3)
Publication Number | Publication Date |
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WO2000003743A2 true WO2000003743A2 (en) | 2000-01-27 |
WO2000003743A9 WO2000003743A9 (en) | 2000-07-27 |
WO2000003743A3 WO2000003743A3 (en) | 2001-02-01 |
Family
ID=26813640
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PCT/US1999/016146 WO2000003743A2 (en) | 1998-07-15 | 1999-07-15 | Use of inhibitors of prenyltransferases for inhibiting fungal growth |
Country Status (8)
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---|---|
US (1) | US6423519B1 (en) |
EP (1) | EP1096925A2 (en) |
JP (1) | JP2002520372A (en) |
KR (1) | KR20010083115A (en) |
AU (1) | AU5107599A (en) |
CA (1) | CA2335381A1 (en) |
IL (1) | IL140686A0 (en) |
WO (1) | WO2000003743A2 (en) |
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US8492558B2 (en) | 2009-02-19 | 2013-07-23 | Basf Se | Method for producing 2-aminobiphenylene |
Also Published As
Publication number | Publication date |
---|---|
KR20010083115A (en) | 2001-08-31 |
AU5107599A (en) | 2000-02-07 |
WO2000003743A9 (en) | 2000-07-27 |
JP2002520372A (en) | 2002-07-09 |
US6423519B1 (en) | 2002-07-23 |
EP1096925A2 (en) | 2001-05-09 |
IL140686A0 (en) | 2002-02-10 |
CA2335381A1 (en) | 2000-01-27 |
WO2000003743A3 (en) | 2001-02-01 |
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