WO2014184271A1 - 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators - Google Patents

11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators Download PDF

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Publication number
WO2014184271A1
WO2014184271A1 PCT/EP2014/059896 EP2014059896W WO2014184271A1 WO 2014184271 A1 WO2014184271 A1 WO 2014184271A1 EP 2014059896 W EP2014059896 W EP 2014059896W WO 2014184271 A1 WO2014184271 A1 WO 2014184271A1
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compound
disease
amino acid
subject
pharmaceutically acceptable
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PCT/EP2014/059896
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French (fr)
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Roberto Pellicciari
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Tes Pharma Srl.
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Priority to MEP-2018-159A priority Critical patent/ME03082B/en
Priority to TN2015000497A priority patent/TN2015000497A1/en
Priority to EP18163623.4A priority patent/EP3360882B1/en
Priority to PL18163622T priority patent/PL3360881T3/en
Priority to SI201430701T priority patent/SI2997035T1/en
Priority to PL14723820T priority patent/PL2997035T3/en
Priority to JP2016513357A priority patent/JP6326131B2/en
Priority to DK14723820.8T priority patent/DK2997035T3/en
Priority to ES14723820.8T priority patent/ES2671427T3/en
Priority to UAA201511098A priority patent/UA118673C2/en
Priority to CN201480036949.5A priority patent/CN105377870B/en
Priority to EA201592055A priority patent/EA030152B1/en
Priority to MX2015015730A priority patent/MX352065B/en
Priority to KR1020157034951A priority patent/KR102229952B1/en
Priority to AU2014267324A priority patent/AU2014267324B2/en
Priority to PL18163623T priority patent/PL3360882T3/en
Priority to EP20211780.0A priority patent/EP3848038B1/en
Priority to EP18163622.6A priority patent/EP3360881B1/en
Priority to LTEP14723820.8T priority patent/LT2997035T/en
Application filed by Tes Pharma Srl. filed Critical Tes Pharma Srl.
Priority to NZ714082A priority patent/NZ714082B2/en
Priority to BR112015028399-3A priority patent/BR112015028399B1/en
Priority to RS20180690A priority patent/RS57372B1/en
Priority to EP14723820.8A priority patent/EP2997035B8/en
Priority to CA2912139A priority patent/CA2912139C/en
Priority to MA38647A priority patent/MA38647B1/en
Priority to SG11201509352XA priority patent/SG11201509352XA/en
Publication of WO2014184271A1 publication Critical patent/WO2014184271A1/en
Priority to IL242555A priority patent/IL242555B/en
Priority to SA515370140A priority patent/SA515370140B1/en
Priority to PH12015502576A priority patent/PH12015502576B1/en
Priority to CR20150643A priority patent/CR20150643A/en
Priority to HK16109719.3A priority patent/HK1221471A1/en
Priority to US15/434,685 priority patent/US20170216316A1/en
Priority to CY20181100583T priority patent/CY1122614T1/en
Priority to HRP20180931TT priority patent/HRP20180931T1/en
Priority to US16/124,139 priority patent/US10532061B2/en
Priority to US16/695,528 priority patent/US11000532B2/en
Priority to IL272718A priority patent/IL272718B/en
Priority to US17/228,819 priority patent/US20210228599A1/en
Priority to US18/295,091 priority patent/US20230233581A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
    • A61K31/575—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids substituted in position 17 beta by a chain of three or more carbon atoms, e.g. cholane, cholestane, ergosterol, sitosterol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00—Drugs for disorders of the urinary system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J41/00—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring
    • C07J41/0033—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005
    • C07J41/0055—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005 the 17-beta position being substituted by an uninterrupted chain of at least three carbon atoms which may or may not be branched, e.g. cholane or cholestane derivatives, optionally cyclised, e.g. 17-beta-phenyl or 17-beta-furyl derivatives
    • C07J41/0061—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005 the 17-beta position being substituted by an uninterrupted chain of at least three carbon atoms which may or may not be branched, e.g. cholane or cholestane derivatives, optionally cyclised, e.g. 17-beta-phenyl or 17-beta-furyl derivatives one of the carbon atoms being part of an amide group
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J9/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane
    • C07J9/005—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane containing a carboxylic function directly attached or attached by a chain containing only carbon atoms to the cyclopenta[a]hydrophenanthrene skeleton
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J31/00—Normal steroids containing one or more sulfur atoms not belonging to a hetero ring
    • C07J31/006—Normal steroids containing one or more sulfur atoms not belonging to a hetero ring not covered by C07J31/003
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J71/00—Steroids in which the cyclopenta(a)hydrophenanthrene skeleton is condensed with a heterocyclic ring
    • C07J71/0005—Oxygen-containing hetero ring
    • C07J71/001—Oxiranes

Definitions

  • FXR is a member of the nuclear receptor family of ligand-activated transcription factors that includes receptors for the steroid, retinoid, and thyroid hormones (D.J.
  • Bile acids are cholesterol metabolites that are formed in the liver and secreted into the duodenum of the intestine, where they have important roles in the solubilization and absorption of dietary lipids and vitamins. Most bile acids (-95%) are subsequently reabsorbed in the ileum and returned to the liver via the enterohepatic circulatory system. The conversion of cholesterol to bile acids in the liver is under feedback regulation: bile acids down-regulate the transcription of cytochrome P450 7a (CYP7a), which encodes the enzyme that catalyzes the rate limiting step in bile acid biosynthesis. It is suggested that FXR is involved in the repression of CYP7a expression by bile acids (D.W.
  • bile acids induce the expression of the intestinal bile acid binding protein (IBABP), which binds bile acids with high affinity and may be involved in their cellular uptake and trafficking. It is demonstrated that bile acids mediate their effects on IBABP expression through activation of FXR, which binds to an IR-1 type response element that is conserved in the human, rat, and mouse IBABP gene promoters.
  • FXR is involved in both the stimulation (IBABP) and the repression (CYP7a) of target genes involved in bile acid and cholesterol homeostasis. Accordingly, there is a need for FXR modulators suitable for drug development. The present invention addresses this need.
  • the invention provides compounds and methods of preparing these compounds.
  • R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are as described herein.
  • the compounds of the invention are useful for treating and preventing diseases and conditions.
  • the invention also provides a pharmaceutical composition
  • a pharmaceutical composition comprising a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof, and a pharmaceutically acceptable carrier or excipient.
  • the invention also provides a method for the treatment or prevention of a disease and condition, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the disease or condition is FXR-mediated.
  • the invention also provides for the manufacture of a medicament for treating or preventing a disease or condition (e.g., a disease or condition mediated by FXR), wherein the medicament comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • a disease or condition e.g., a disease or condition mediated by FXR
  • the medicament comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention also provides a composition for use in a method for treating or preventing a disease or condition (e.g., a disease or condition mediated by FXR), wherein the composition comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • a disease or condition e.g., a disease or condition mediated by FXR
  • the composition comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • Figure 1 is a graph showing the activity of a compound of the invention and a comparison compound in a transactivation assay in HEK293T cells
  • FIG 2 is a series of graphs showing the lack of TGR5 activity of a compound of the invention in human enteroendocrine cells expressing TGR5 at physiological level (A) and in human Chinese hamster ovary (CHO) cells over-expressing TGR5 (B).
  • Figure 3 is a series of graphs showing the activity of a compound of the invention and other comparison compounds in regulating expression of OSTa (A), ⁇ (B), BSEP (C), MRP2 (D), CYP7A1 (E), SHP (F), FGF-19 (G), and UGT2B4 (H).
  • Figure 4 is a series of graphs showing the activity of a compound of the invention and other comparison compounds in regulating PLTP involved in lipid metabolism (A), SREBP- 1C (B), APOCII (C), and PPARy (D).
  • Figure 5 is a graph showing the regulation of a compoundd of the invention and other comparison compounds on PEPCK gene.
  • Figure 6 is a graph showing the measurement of ATP in HepG2 cells, treated with the indicated concentrations of a compound of the invention for 4 h.
  • Figure 7 is a series of graphs showing the choleretic effect of Compound 100 for id and iv administration (A), the secretion of Compound 100 over time for id and iv administration (B), and the plasma concentration of Compound 100 over time (C).
  • the present invention relates to a compound of formula I:
  • R 1 is hydroxyl
  • R 2 is hydrogen, hydroxyl, alkyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more R a ;
  • R 3 is hydrogen, hydroxyl, alkyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more R b ;
  • R 4 is hydrogen, alkyl, alkenyl, alkynyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more R c ;
  • R a , R b , and R c are each independently halogen or hydroxyl
  • R 5 is hydroxyl, OS0 3 H, OS0 3 " , OCOCH 3 , OP0 3 H, OP0 3 2 ⁇ , or hydrogen;
  • R 6 is hydroxyl, OS0 3 H, OS0 3 ⁇ , OCOCH 3 , OP0 3 H, OP0 3 2 ⁇ , or hydrogen;
  • the present invention relates to a compound formula II:
  • the present invention relates to a compound of formula III:
  • the present invention relates to a compound of formula IV:
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is the compound (e.g. , the native compound, or the compound in the non-salt, unsolvateed, and non-conjuated form).
  • the compound e.g. , the native compound, or the compound in the non-salt, unsolvateed, and non-conjuated form.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is the pharmaceutically acceptable salt.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is the amino acid conjugate.
  • the amino acid conjugate is a glycine conjugate.
  • the amino acid conjugate is a taurine conjugate.
  • the present invention relates to a compound of formula I, wherein one of R 2 or R 3 is hydroxyl or halogen and the remaining R 2 or R 3 is hydrogen or unsubstituted alkyl. In one aspect, one of R 2 or R 3 is hydroxyl and the remaining R 2 or R 3 is hydrogen.
  • the present invention relates to a compound of formula I, wherein one of R 5 or R 6 is hydroxyl and the remaining R 5 or R 6 is hydrogen.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein R 2 is hydroxyl or halogen. In one aspect, R 2 is hydroxyl. In another aspect, R 2 is halogen.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein R 3 is hydrogen or unsubstituted alkyl. In one aspect, R 3 is hydrogen. In another aspect, R 3 is methyl.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein R 2 is hydroxyl and R 3 is hydrogen.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein R 5 is hydroxyl.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein R 6 is hydrogen.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein R 2 and R 5 are each hydroxyl and R 3 and R 6 are each hydrogen.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein R 4 is alkyl or hydrogen.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein R 4 is unsubstituted alkyl.
  • R 4 is methyl, ethyl, propyl, or butyl.
  • R 4 is methyl or ethyl.
  • R 4 is methyl.
  • R 4 is ethyl.
  • the present invention relates to compound
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is an FXR agonist.
  • the compound of the invention is a highly potent FXR agonist.
  • the compound of the invention activates FXR at a concentration below 1 ⁇ , below 0.8 ⁇ , below 0.6 ⁇ , below 0.4 ⁇ , or below 0.2 ⁇ (e.g. , as measured by an AlphaScreen assay), as compared to 15 ⁇ for CDC A.
  • the compound of the invention activates FXR at a concentration below 0.2 ⁇ (e.g., as measured by an AlphaScreen assay).
  • the compound of the invention activates FXR with an EC 5 o below 1 ⁇ , below 0.8 ⁇ , below 0.6 ⁇ , below 0.4 ⁇ , or below 0.2 ⁇ (e.g. , as measured by an AlphaScreen assay), as compared to 8.9 ⁇ for CDCA.
  • the compound of the invention activates FXR with an EC 50 below 0.2 ⁇ (e.g. , as measured by an AlphaScreen assay).
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is not active against other nuclear receptors. In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound does not activate TGR5 (e.g. , as measured by an HTR-FRET TGR5 assay, where the TGR5 is either expressed at a physiological level or overexpressed).
  • TGR5 e.g. , as measured by an HTR-FRET TGR5 assay, where the TGR5 is either expressed at a physiological level or overexpressed.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound induces apoptosis.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound shows no cytotoxic effect on human HepG2 liver cells (e.g. , as measured by an LDH release assay or an intracellular ATP assay).
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound does not inhibit one or more CYP450 iso forms selected from
  • the compounds of the invention have an IC 50 greater than 10 ⁇ as measured by CPY450 inhibition assay.
  • the present invention relates to a compound of formula I, II, III, or IV, wherein the compound does not inhibit the human ERG potassium channel.
  • the present invention relates to a method of synthesizing a compound of the invention, or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the present invention relates to a kit containing one or more compounds of the invention, or a pharmaceutically acceptable salt, solvate, or amino acid conjutate thereof.
  • the kit further contains a pharmaceutically acceptable ingredient.
  • the present invention relates to a pharmaceutical composition
  • a pharmaceutical composition comprising a compound of the invention and a pharmaceutically acceptable excipient.
  • FXR farnesoid X receptor
  • GPCR G protein-coupled receptor
  • Selectivity can be a problem for drug compounds directed to modulating a nuclear hormone receptor. It is therefore an objective of the present invention to provide a compound that is a specific FXR agonist, for example, a compound that shows no activity against other nuclear receptors or a compound that does not activate the bile acid GPCR TGR5.
  • alkyl refers to a branched or unbranched saturated hydrocarbon group.
  • n- alkyl refers to an unbranched alkyl group.
  • C x -C y alkyl refers to an alkyl group having between x and y carbon atoms, inclusively, in the branched or unbranched
  • Ci-Cs alkyl refers to a straight chain or branched hydrocarbon moiety having 1, 2, 3, 4, 5, 6, 7, or 8 carbon atoms.
  • Ci-C 6 refers to a straight chain or branched hydrocarbon moiety having 1, 2, 3, 4, 5, or 6 carbon atoms.
  • C 1 -C 4 alkyl refers to a straight chain or branched hydrocarbon moiety having 1, 2, 3, or 4 carbon atoms, including methyl, ethyl, w-propyl, isopropyl, n- butyl, isobutyl, sec-butyl, and ie/t-butyl.
  • C 1 -C 4 w-alkyl refers to straight chain hydrocarbon moieties that have from 1, 2, 3, or 4 carbon atoms including methyl, ethyl, n- propyl, and w-butyl.
  • C 3 -C6 cycloalkyl refers to cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl.
  • C 3 -C7 cycloalkyl also includes cycloheptyl.
  • C 3 -C 8 cycloalkyl also includes cyclooctyl.
  • Cycloalkylalkyl refers to cycloalkyl moieties linked through an alkyl linker chain, as for example, but without limitation, cyclopropylmethyl, cyclopropylethyl, cyclopropylpropyl, cyclopropylbutyl,
  • Each alkyl, cycloalkyl, and cycloalkylalkyl group may be optionally substituted as specified herein.
  • C 4 -C 8 cycloalkenyl refers cyclobutenyl, cyclopentyl, cyclohexenyl, cycloheptenyl, and cyclooctenyl rings having one or more sites of unsaturation, e.g., one or more double bonds.
  • halogen refers to fluoro, chloro, bromo, or iodo.
  • hydroxyl means OH.
  • 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, etc.
  • substituted is contemplated to include all permissible substituents of organic compounds unless otherwise specified.
  • the permissible substituents include acyclic and cyclic, branched and unbranched, carbocyclic and heterocyclic, aromatic and nonaromatic substituents of organic compounds.
  • the permissible substituents can be one or more and the same or different for appropriate organic compounds.
  • the 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.
  • pharmaceutical or “pharmaceutically acceptable” when used herein as an adjective, means substantially non-toxic and substantially non-deleterious to the recipient.
  • pharmaceutical formulation it is further meant that the carrier, solvent, excipient, and salt must be compatible with the active ingredient of the formulation (e.g., a compound of the invention). It is understood by those of ordinary skill in this art that the terms “pharmaceutical formulation” and “pharmaceutical composition” are generally interchangeable, and they are so used for the purposes of this application.
  • Suitable pharmaceutically acceptable salts according to the invention will be readily determined by one skilled in the art and will include, for example, basic salts such as alkali or alkaline-earth metallic salts made from aluminium, calcium, lithium, magnesium, potassium, sodium, and zinc or organic salts made from ⁇ , ⁇ '-dibenzylethylenediamine, chlorprocaine, choline, diethanolamine, ethylenediamine, meglumine (N-methylglucamine), and procaine. Salts with pharmaceutically acceptable amines such as lysine, arginine, tromethamine, triethylamine and the like can also be used. Such salts of the compounds of the invention may be prepared using conventional techniques, from the compound of the invention by reacting, for example, the appropriate base with the compound of the invention.
  • basic salts such as alkali or alkaline-earth metallic salts made from aluminium, calcium, lithium, magnesium, potassium, sodium, and zinc or organic salts made from ⁇ , ⁇ '-dibenzyl
  • salts of a compound of the invention should be pharmaceutically acceptable, but pharmaceutically unacceptable salts may conveniently be used to prepare the corresponding free base or pharmaceutically acceptable salts thereof.
  • amino acid conjugate refers to a conjugate of a compound of the invention with any suitable amino acid.
  • suitable amino acid conjugate of a compound of the invention will have the added advantage of enhanced integrity in bile or intestinal fluids.
  • the present invention encompasses the glycine and taurine conjugates of any of the compounds of the invention.
  • the glycine and the taurine conjugates of a compound of formula I have the following formula:
  • the glycine and taurine conjuates of a compound of the invention may be a pharmaceutically acceptable salt thereof.
  • the amino acid conjugates of compounds of the invention can be prepared according to methods known in the art.
  • the free acid can be coupled to the glycine or taurine amino acid using standard peptide coupling conditions.
  • the sodium salt of the taurine conjugate of Compound 100 can be prepar as follows.
  • Compound 100 is treated with a base (e.g. , Et 3 N) and taurine in a polar protic solvent (e.g. , EtOH).
  • a base e.g. , Et 3 N
  • a polar protic solvent e.g. , EtOH
  • the resulting mixture can be treated with a coupling reagent (e.g. , DMT -MM (4-(4,6-Dimethoxy-l ,3,5-triazin-2-yl)-4-methylmorpholinium chloride)).
  • the reaction mixture can be concentrated and dissolved in a base (e.g., 3% w/v aqueous solution of NaOH).
  • the resulting reaction mixture can be extracted with an organic solvent (e.g.,
  • the aqueous phase can be concentrated and filtered on a silica pad, eluting first with, e.g., H 2 0 (until neutral pH) and then with, e.g., H20/MeOH 80:20 v/v to give the taurine conjugate of Compound 100.
  • Suitable amino acids include but are not limited to glycine and taurine.
  • Some of the compounds of the present invention may exist in unsolvated as well as solvated forms such as, for example, hydrates.
  • the present invention provides methods for the synthesis of the compounds of invention described herein.
  • the present invention also provides detailed methods for the synthesis of various disclosed compounds of the invention according to the following schemes as shown in the examples.
  • the synthetic processes of the invention can tolerate a wide variety of functional groups, therefore various substituted starting materials can be used.
  • the processes generally provide the desired final compound at or near the end of the overall process, although it may be desirable in certain instances to further convert the compound to a pharmaceutically acceptable salt, ester or prodrug thereof.
  • Reagents and conditions a) 1) MeOH, p-TSA, ultrasound, 3 h, quantitative; 2) Ac 2 0, NaHC0 3 , THF, reflux 12 h, 85%; b) PCC, CH 2 C1 2 , 6 h, 62%; c) Ac 2 0, Bi(OTf) 3 , CH 2 C1 2 , 1 h, 91%; d) Br 2 , Benzene, 30 °C overnight, 74%; e) NaBH 4 , NaOAc, Pyr, r.t. 2 days, 80%; f) HI 57%, AcOH, r.t. 30 min; g) Cr0 3 , AcOH, r.t.
  • 6-ECA 6a-ethyl-cholic acid
  • 6-ECA (1) was treated with p- TSA in MeOH under ultrasound irradiation to give the corresponding methyl ester, which was selectively protected at the C3 position by refluxing with Ac 2 0 in the present of NaHC0 3 in THF to afford compound 2.
  • compound 7 was reduced with sodium in sec- uOH at 50 °C to give Compound 101 (about 70%> yield), after purification.
  • Solvate means a solvent addition form that contains either a stoichiometric or non stoichiometric amounts of solvent. Some compounds have a tendency to trap a fixed molar ratio of solvent molecules in the crystalline solid state, thus forming a solvate. If the solvent is water the solvate formed is a hydrate; when the solvent is alcohol, the solvate formed is an alcoholate. Hydrates are formed by the combination of one or more molecules of water with one of the substances in which the water retains its molecular state as H 2 0, such combination being able to form one or more hydrate.
  • suitable solvent refers to any solvent, or mixture of solvents, inert to the ongoing reaction that sufficiently solubilizes the reactants to afford a medium within which to effect the desired reaction.
  • the compounds described herein can have asymmetric centers.
  • the invention also comprehends isotopically-labeled compounds, which are identical to those recited in the formulae of the invention, but for the fact that one or more atoms are replaced by an atom having an atomic mass or mass number different from the atomic mass or mass number most commonly found in nature.
  • isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, fluorine, such as 3 H, U C, 14 C, 2 H, and 18 F.
  • Isotopically-labeled compounds of the present invention for example those into which radioactive isotopes such as 3 H and 14 C are incorporated, are useful in drug and/or substrate tissue distribution assays. Tritiated, i.e., 3 H, and carbon- 14, i.e., 14 C, isotopes are particularly preferred for their ease of preparation and detectability. n C and 18 F isotopes are particularly useful in PET (positron emission tomography). PET is useful in brain imaging.
  • isotopically labeled compounds of this invention can generally be prepared through techniques known in the art, such as by carrying out the procedures disclosed in the Schemes and/or in the Examples below, by substituting a readily available isotopically labeled reagent for a non-isotopically labeled reagent.
  • the compounds of the invention, salts, hydrates, solvates, or amino acid conjugates thereof are not isotopically labelled.
  • any variable e.g., R x
  • its definition at each occurrence is independent of its definition at every other occurrence.
  • R x at each occurrence is selected independently from the definition of R x .
  • combinations of substituents and/or variables are permissible, but only if such combinations result in stable compounds within a designated atom's normal valency.
  • treat is meant decreasing the symptoms, markers, and/or any negative effects of a condition in any appreciable degree in a subject who currently has the condition.
  • treatment may be administered to a subject who exhibits only early signs of the condition for the purpose of decreasing the risk of developing the disease or condition.
  • prevention refers to any method to partially or completely prevent or delay the onset of one or more symptoms or features of a disease, disorder, and/or condition. Prevention may be administered to a subject who does not exhibit signs of a disease or condition.
  • subject means a human or animal (in the case of an animal, more typically a mammal). In one aspect, the subject is a human. Such subject can be considered to be in need of treatment with an FXR agonist.
  • unsaturated refers to compounds or structures having at least one degree of unsaturation (e.g., at least one double or triple bond).
  • a compound of the invention includes a compound of any of formulae I, II, III, or IV, or any compound explicitly disclosed herein.
  • farnesoid X receptor or FXR refers to all mammalian forms of such receptor including, for example, alternative splice isoforms and naturally occurring isoforms (see, e.g., Huber et al., Gene 290:35-43 (2002)).
  • Representative FXR species include, without limitation rat FXR (Gen Bank Accession No. NM 021745), mouse FXR (Genbank Accession No. NM 009108), and human FXR (GenBank Accession No. NM 005123).
  • 6ECDCA 6-alpha-ethyl chenodeoxycholic acid, or 6a-ethyl-3 ,7a-dihydroxy-5P-cholan-24- oic acid.
  • Com ound B is
  • cholic acid is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N
  • chenodeoxycholic acid is
  • ursodeoxycholic acid is also known as CDCA.
  • ursodeoxycholic acid is also known as CDCA.
  • taurochenodeoxycholic acid is taurochenodeoxycholic acid
  • tauroursodeoxycholic acid is
  • TUDCA which is also known as TUDCA.
  • lithocholic acid is
  • compounds of the invention are useful in therapy in subjects such as mammals, including humans.
  • compounds of the invention are useful in a method of treating or preventing a disease or condition in a subject comprising administering to the subject in need thereof an effective amount of a compound of the invention or a
  • the disease or condition is FXR-mediated (e.g. , FXR plays a role in the initiation or progress of the disease or condition).
  • the disease or condition is mediated by decreased FXR activity.
  • the disease or condition is selected from cardiovascular disease, chronic liver disease, lipid disorder, gastrointestinal disease, renal disease, metabolic disease, cancer, and neurological disease.
  • the invention relates to a method of treating or preventing
  • cardiovascular disease in a subject, comprising administereing to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating cardiovascular disease.
  • the invention relates to a method of preventing cardiovascular disease.
  • cardiovascular disease selected from atherosclerosis, arteriosclerosis, dyslipidemia, hypercholesteremia, hyperlipidemia, hyperlipoproteinemia, and hypertriglyceridemia.
  • hyperlipidemia refers to the presence of an abnormally elevated level of lipids in the blood. Hyperlipidemia can appear in at least three forms: (1)
  • hypercholesterolemia i.e., an elevated cholesterol level
  • hypertriglyceridemia i.e., an elevated triglyceride level
  • combined hyperlipidemia i.e., a combination of hypercholesterolemia and hypertriglyceridemia.
  • dislipidemia refers to abnormal levels of lipoproteins in blood plasma including both depressed and/or elevated levels of lipoproteins (e.g., elevated levels of LDL, VLDL and depressed levels of HDL).
  • the invention relates to a method selected from reducing cholesterol levels or modulating cholesterol metabolism, catabolism, absorption of dietary cholesterol, and reverse cholesterol transport in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating or preventing a disease affecting cholesterol, triglyceride, or bile acid levels in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of lowering triglycerides in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating or preventing a disease state associated with an elevated cholesterol level in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating a disease state associated with an elevated cholesterol level in a subject.
  • the invention relates to a method of preventing a disease state associated with an elevated cholesterol level in a subject.
  • the disease state is selected from coronary artery disease, angina pectoris, carotid artery disease, strokes, cerebral arteriosclerosis, and xanthoma.
  • the invention relates to a method of treating or preventing a lipid disorder in a subject, comprising administereing to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating a lipid disorder.
  • the invention relates to a method of preventing a lipid disorder.
  • Lipid disorders are the term for abnormalities of cholesterol and triglycerides. Lipid abnormalities are associated with an increased risk for vascular disease, and especially heart attacks and strokes. Abnormalities in lipid disorders are a combination of genetic
  • lipid disorders are associated with being overweight. Lipid disorders may also be associated with other diseases including diabetes, the metabolic syndrome (sometimes called the insulin resistance syndrome), underactive thyroid or the result of certain medications (such as those used for anti-rejection regimens in people who have had transplants).
  • diabetes sometimes called the insulin resistance syndrome
  • underactive thyroid or the result of certain medications (such as those used for anti-rejection regimens in people who have had transplants).
  • the invention relates to a method of treating or preventing one or more symptoms of disease affecting lipid metabolism (i.e., lipodystrophy) in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating one or more symptoms of a disease affecting lipid metabolism.
  • the invention relates to a method of preventing one or more symptoms of a disease affecting lipid metabolism.
  • the invention relates to a method of decreasing lipid accumulation in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating or preventing chronic liver disease in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating chronic liver disease.
  • the invention relates to a method of preventing chronic liver disease.
  • the chronic liver disease is selected from primary biliary cirrhosis (PBC), cerebrotendinous xanthomatosis (CTX), primary sclerosing cholangitis (PSC), drug induced cholestasis, intrahepatic cholestasis of pregnancy, parenteral nutrition associated cholestasis (PNAC), bacterial overgrowth or sepsis associated cholestasis, autoimmune hepatitis, chronic viral hepatitis, alcoholic liver disease, nonalcoholic fatty liver disease (NAFLD), nonalcoholic steatohepatitis (NASH), liver transplant associated graft versus host disease, living donor transplant liver regeneration, congenital hepatic fibrosis, choledocholithiasis, granulomatous liver disease, intra- or extrahepatic malignancy, Sjogren's syndrome, Sarcoidosis, Wilson's disease, Gaucher' s disease, hemochromatosis, and alpha 1- antitrypsin de
  • the invention relates to a method of treating or preventing one or more symptoms of cholestasis, including complications of cholestasis in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating one or more symptoms of cholestasis.
  • the invention relates to preventing one or more symptoms of cholestasis.
  • Intrahepatic cholestasis is typically caused by factors within the liver (intrahepatic) or outside the liver (extrahepatic) and leads to the accumulation of bile salts, bile pigment bilirubin, and lipids in the blood stream instead of being eliminated normally.
  • Intrahepatic cholestasis is characterized by widespread blockage of small ducts or by disorders, such as hepatitis, that impair the body's ability to eliminate bile.
  • Intrahepatic cholestasis may also be caused by alcoholic liver disease, primary biliary cirrhosis, cancer that has spread (metastasized) from another part of the body, primary sclerosing cholangitis, gallstones, biliary colic and acute cholecystitis. It can also occur as a complication of surgery, serious injury, cystic fibrosis, infection, or intravenous feeding or be drug induced. Cholestasis may also occur as a complication of pregnancy and often develops during the second and third trimesters.
  • Extrahepatic cholestasis is most often caused by choledocholithiasis (Bile Duct Stones), benign biliary strictures (non-cancerous narrowing of the common duct),
  • cholangiocarcinoma ductal carcinoma
  • pancreatic carcinoma Extrahepatic cholestasis can occur as a side effect of many medications.
  • a compound of the invention may be used for treating or preventing one or more symptoms of intrahepatic or extrahepatic cholestasis, including without limitation, biliary artesia, obstetric cholestasis, neonatal cholestasis, drug induced cholestasis, cholestasis arising from Hepatitis C infection, chronic cholestatic liver disease such as primary biliary cirrhosis (PBC), and primary sclerosing cholangitis (PSC).
  • PBC primary biliary cirrhosis
  • PSC primary sclerosing cholangitis
  • the invention relates to a method of enhancing liver regeneration in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the method is enhancing liver regeneration for liver transplantation.
  • the invention relates to a method of treating or preventing fibrosis in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating fibrosis. In one aspect, the invention relates to a method of preventing fibrosis.
  • fibrosis refers to all recognized fibrotic disorders, including fibrosis due to pathological conditions or diseases, fibrosis due to physical trauma (“traumatic fibrosis”), fibrosis due to radiation damage, and fibrosis due to exposure to chemotherapeutics.
  • organ fibrosis includes but is not limited to liver fibrosis, fibrosis of the kidneys, fibrosis of lung, and fibrosis of the intestine.
  • Traumatic fibrosis includes but is not limited to fibrosis secondary to surgery (surgical scarring), accidental physical trauma, burns, and hypertrophic scarring.
  • liver fibrosis includes liver fibrosis due to any cause, including but not limited to virally-induced liver fibrosis such as that due to hepatitis B or C virus;
  • alcohol alcoholic liver disease
  • certain pharmaceutical compounds including but not limited to methotrexate, some chemotherapeutic agents, and chronic ingestion of arsenicals or vitamin A in megadoses, oxidative stress, cancer radiation therapy or certain industrial chemicals including but not limited to carbon tetrachloride and
  • liver fibrosis is primarily directed at removing the causal agent, e.g. , removing excess iron (e.g. , in the case of hemochromatosis), decreasing viral load (e.g., in the case of chronic viral hepatitis), or eliminating or decreasing exposure to toxins (e.g. , in the case of alcoholic liver disease).
  • diseases such as primary biliary cirrhosis, primary sclerosing colangitis, fatty liver, obesity, non-alcoholic steatohepatitis, cystic fibrosis, hemochromatosis, auto-immune hepatitis, and steatohepatitis.
  • Current therapy in liver fibrosis is primarily directed at removing the causal agent, e.g. , removing excess iron (e.g. , in the case of hemochromatosis), decreasing viral load (e.g., in the case of chronic viral hepatitis), or eliminating or decreasing exposure to toxins (e.g. , in
  • liver fibrosis may be clinically classified into five stages of severity (SO, SI, S2, S3, and S4), usually based on histological examination of a biopsy specimen. SO indicates no fibrosis, whereas S4 indicates cirrhosis. While various criteria for staging the severity of liver fibrosis exist, in general early stages of fibrosis are identified by discrete, localized areas of scarring in one portal (zone) of the liver, whereas later stages of fibrosis are identified by bridging fibrosis (scarring that crosses zones of the liver).
  • the invention relates to a method of treating or preventing organ fibrosis in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the fibrosis is liver fibrosis.
  • the invention relates to a method of treating or preventing
  • the invention in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating gastrointestinal disease.
  • the invention relates to a method of preventing gastrointestinal disease.
  • the gastrointestinal disease is selected from inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), bacterial overgrowth, malabsorption, post-radiation colitis, and microscopic colitis.
  • IBD inflammatory bowel disease
  • IBS irritable bowel syndrome
  • bacterial overgrowth malabsorption
  • post-radiation colitis and microscopic colitis.
  • inflammatory bowel disease is selected from Crohn's disease and ulcerative colitis.
  • the invention relates to a method of treating or preventing renal disease in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating renal disease.
  • the invention relates to a method of preventing renal disease.
  • the renal disease is selected from diabetic nephropathy, focal segmental glomerulosclerosis (FSGS), hypertensive nephrosclerosis, chronic glomerulonephritis, chronic transplant glomerulopathy, chronic interstitial nephritis, and polycystic kidney disease.
  • FSGS focal segmental glomerulosclerosis
  • the invention relates to a method of treating or preventing metabolic disease in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating renal disease.
  • the invention relates to a method of preventing renal disease.
  • the metabolic disease is selected from insulin resistance, hyperglycemia, diabetes mellitus, diabesity, and obesity.
  • the diabetes mellitus is type I diabetes.
  • the diabetes mellitus is type II diabetes.
  • Diabetes mellitus commonly called diabetes, refers to a disease or condition that is generally characterized by metabolic defects in production and utilization of glucose which result in the failure to maintain appropriate blood sugar levels in the body.
  • type II diabetes the disease is characterized by insulin resistance, in which insulin loses its ability to exert its biological effects across a broad range of concentrations.
  • This resistance to insulin responsiveness results in insufficient insulin activation of glucose uptake, oxidation and storage in muscle and inadequate insulin repression of lipolysis in adipose tissue and of glucose production and secretion in liver.
  • the resulting condition is elevated blood glucose, which is called "hyperglycemia”.
  • Uncontrolled hyperglycemia is associated with increased and premature mortality due to an increased risk for microvascular and macrovascular diseases, including retinopathy (the impairment or loss of vision due to blood vessel damage in the eyes); neuropathy (nerve damage and foot problems due to blood vessel damage to the nervous system); and nephropathy (kidney disease due to blood vessel damage in the kidneys), hypertension, cerebrovascular disease and coronary heart disease. Therefore, control of glucose homeostasis is a critically important approach for the treatment of diabetes.
  • retinopathy the impairment or loss of vision due to blood vessel damage in the eyes
  • neuropathy nerve damage and foot problems due to blood vessel damage to the nervous system
  • nephropathy kidney disease due to blood vessel damage in the kidneys
  • hypertension cerebrovascular disease and coronary heart disease
  • Insulin resistance has been hypothesized to unify the clustering of hypertension, glucose intolerance, hyperinsulinemia, increased levels of triglyceride and decreased HDL cholesterol, and central and overall obesity.
  • the association of insulin resistance with glucose intolerance, an increase in plasma triglyceride and a decrease in high-density lipoprotein cholesterol concentrations, hypertension, hyperuricemia, smaller denser low- density lipoprotein particles, and higher circulating levels of plasminogen activator inhibitor- 1, has been referred to as "Syndrome X". Accordingly, methods of treating or preventing any disorders related to insulin resistance including the cluster of disease states, conditions or disorders that make up "Syndrome X" are provided.
  • the invention relates to a method of treating or preventing metabolic syndrome in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating metabolic syndrome.
  • the invention relates to a method of preventing metabolic syndrome.
  • the invention relates to a method of treating or preventing cancer in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating cancer.
  • the invention relates to a method of preventing cancer.
  • the cancer is colorectal cancer.
  • the invention relates to a method of treating or preventing gallstones in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating gallstones.
  • the invention relates to a method of preventing gallstones.
  • a gallstone is a crystalline concretion formed within the gallbladder by accretion of bile components. These calculi are formed in the gallbladder but may distally pass into other parts of the biliary tract such as the cystic duct, common bile duct, pancreatic duct, or the ampulla of Vater. Rarely, in cases of severe inflammation, gallstones may erode through the gallbladder into adherent bowel potentially causing an obstruction termed gallstone ileus.
  • Presence of gallstones in the gallbladder may lead to acute cholecystitis, an inflammatory condition characterized by retention of bile in the gallbladder and often secondary infection by intestinal microorganisms, predominantly Escherichia coli and Bacteroides species.
  • Presence of gallstones in other parts of the biliary tract can cause obstruction of the bile ducts, which can lead to serious conditions such as ascending cholangitis or pancreatitis.
  • the invention relates to a method of treating or preventing cholesterol gallstone disease in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating cholesterol gallstone disease.
  • the invention relates to a method of preventing cholesterol gallstone disease.
  • the invention relates to a method of treating or preventing neurological disease in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention relates to a method of treating neurological disease.
  • the invention relates to a method of preventing neurological disease.
  • the neurological disease is stroke.
  • the invention relates to a method as decribed herein and further wherein, the compound is administered by a route selected from oral, parenteral, intramuscular, intranasal, sublingual, intratracheal, inhalation, ocular, vaginal, rectal, and intracerebroventricular.
  • the route is oral.
  • the compound utiltized in one or more of the methods described herein is an FXR agonist.
  • the compound is a selective FXR agonist.
  • the compound does not activate TGR5.
  • the compound does not activate other nuclear receptors involved in metabolic pathways (e.g. , as measured by an AlphaScreen assay).
  • such other nuclear receptors involved in metabolic pathways are selected from LXRp, PXR, CAR, PPARa, PPAR5, RARa, VDR, TR, PR, RXR, GR, and ER.
  • the compound induces apoptosis.
  • the invention relates to a method of regulating the expression level of one or more genes involved in bile acid homeostasis.
  • the invention relates to a method of down regulating the expression level of one or more genes selected from CYP7al and SREBP-IC in a cell by administering to the cell a compound of the invention. In one aspect, the invention relates to a method of up regulating the expression level of one or more genes selected from OSTa, OSTp, BSEP, SHP, UGT2B4, MRP2, FGF-19, PPARy, PLTP, APOCII, and PEPCK in a cell by
  • the invention also relates to the manufacture of a medicament for treating or preventing a disease or condition (e.g., a disease or condition mediated by FXR), wherein the medicament comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • a disease or condition e.g., a disease or condition mediated by FXR
  • the invention relates to the manufacture of a medicament for treating or preventing any one of the diseases or conditions described herein above, wherein the medicament comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the invention also relates to a composition for use in a method for treating or preventing a disease or condition (e.g., a disease or condition mediated by FXR), wherein the composition comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • a disease or condition e.g., a disease or condition mediated by FXR
  • the invention relates to a composition for use in a method for treating or preventing any one of the diseases or conditions described herein above, wherein the composition comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
  • the methods of the invention comprise the step of administering an effective amount of a compound of the invention.
  • an "effective amount" refers to an amount of a compound of the invention which is sufficient to achieve the stated effect.
  • an effective amount of a compound of the invention used in a method for the prevention or treatment of FXR mediated diseases or conditions will be an amount sufficient to prevent or treat the FXR mediated disease or condition.
  • an effective amount of a compound of the invention for use in a method for the prevention or treatment of a cholestatic liver disease or increasing bile flow will be an amount sufficient to increase bile flow to the intestine.
  • a typical daily dose for the treatment of a FXR mediated disease and condition may be expected to lie in the range of from about 0.01 mg/kg to about 100 mg/kg.
  • This dose may be administered as a single unit dose or as several separate unit doses or as a continuous infusion. Similar dosages would be applicable for the treatment of other diseases, conditions and therapies including the prevention and treatment of cholestatic liver diseases.
  • the present invention provides a pharmaceutical composition
  • a pharmaceutical composition comprising, as active ingredient, a compound of the invention together, and/or in admixture, with at least one pharmaceutical carrier or diluent.
  • These pharmaceutical compositions may be used in the prevention or treatment of the foregoing diseases or conditions.
  • the carrier must be pharmaceutically acceptable and must be compatible with, i.e. not have a deleterious effect upon, the other ingredients in the composition.
  • the carrier may be a solid or liquid and is preferably formulated as a unit dose formulation, for example, a tablet which may contain from 0.05 to 95% by weight of the active ingredient. If desired, other physiologically active ingredients may also be incorporated in the pharmaceutical compositions of the invention.
  • Possible formulations include those suitable for oral, sublingual, buccal, parenteral
  • Formulations suitable for oral administration may be provided as discrete units, such as tablets, capsules, cachets, lozenges, each containing a predetermined amount of the active compound; as powders or granules; as solutions or suspensions in aqueous or non-aqueous liquids; or as oil-in- water or water-in-oil emulsions.
  • Formulations suitable for sublingual or buccal administration include lozenges comprising the active compound and, typically a flavoured base, such as sugar and acacia or tragacanth and pastilles comprising the active compound in an inert base, such as gelatine and glycerine or sucrose acacia.
  • a flavoured base such as sugar and acacia or tragacanth
  • pastilles comprising the active compound in an inert base, such as gelatine and glycerine or sucrose acacia.
  • Formulations suitable for parenteral administration typically comprise sterile aqueous solutions containing a predetermined concentration of the active compound; the solution is preferably isotonic with the blood of the intended recipient.
  • Additional formulations suitable for parenteral administration include formulations containing physiologically suitable co-solvents and/or complexing agents such as surfactants and cyclodextrins.
  • Oil-in-water emulsions are also suitable formulations for parenteral formulations. Although such solutions are preferably administered intravenously, they may also be administered by subcutaneous or intramuscular injection.
  • Formulations suitable for rectal administration are preferably provided as unit-dose suppositories comprising the active ingredient in one or more solid carriers forming the suppository base, for example, cocoa butter.
  • Formulations suitable for topical or intranasal application include ointments, creams, lotions, pastes, gels, sprays, aerosols and oils.
  • Suitable carriers for such formulations include petroleum jelly, lanolin, polyethyleneglycols, alcohols, and combinations thereof.
  • Formulations of the invention may be prepared by any suitable method, typically by uniformly and intimately admixing the active compound with liquids or finely divided solid carriers or both, in the required proportions and then, if necessary, shaping the resulting mixture into the desired shape.
  • a tablet may be prepared by compressing an intimate mixture comprising a powder or granules of the active ingredient and one or more optional ingredients, such as a binder, lubricant, inert diluent, or surface active dispersing agent, or by moulding an intimate mixture of powdered active ingredient and inert liquid diluent.
  • Suitable formulations for administration by inhalation include fine particle dusts or mists which may be generated by means of various types of metered dose pressurised aerosols, nebulisers, or insufflators.
  • the particle size of the powder or droplets is typically in the range 0.5-10 ⁇ , preferably 1-5 um, to ensure delivery into the bronchial tree.
  • a particle size in the range 10-500 ⁇ is preferred to ensure retention in the nasal cavity.
  • Metered dose inhalers are pressurised aerosol dispensers, typically containing a suspension or solution formulation of the active ingredient in a liquefied propellant. During use, these devices discharge the formulation through a valve adapted to deliver a metered volume, typically from 10 to 150 ⁇ , to produce a fine particle spray containing the active ingredient.
  • Suitable propellants include certain chlorofluorocarbon compounds, for example, dichlorodifluoromethane, trichlorofluoromethane, dichlorotetrafluoroethane and mixtures thereof.
  • the formulation may additionally contain one or more co-solvents, for example, ethanol surfactants, such as oleic acid or sorbitan trioleate, anti-oxidants and suitable flavouring agents.
  • Nebulisers are commercially available devices that transform solutions or suspensions of the active ingredient into a therapeutic aerosol mist either by means of acceleration of a compressed gas typically air or oxygen, through a narrow venturi orifice, or by means of ultrasonic agitation.
  • Suitable formulations for use in nebulisers consist of the active ingredient in a liquid carrier and comprise up to 40% w/w of the formulation, preferably less than 20%) w/w.
  • the carrier is typically water or a dilute aqueous alcoholic solution, preferably made isotonic with body fluids by the addition of, for example, sodium chloride.
  • Optional additives include preservatives if the formulation is not prepared sterile, for example, methyl hydroxy-benzoate, anti-oxidants, flavouring agents, volatile oils, buffering agents and surfactants.
  • Suitable formulations for administration by insufflation include finely comminuted powders which may be delivered by means of an insufflator or taken into the nasal cavity in the manner of a snuff.
  • the powder is contained in capsules or cartridges, typically made of gelatin or plastic, which are either pierced or opened in situ and the powder delivered by air drawn through the device upon inhalation or by means of a manually- operated pump.
  • the powder employed in the insufflator consists either solely of the active ingredient or of a powder blend comprising the active ingredient, a suitable powder diluent, such as lactose, and an optional surfactant.
  • the active ingredient typically comprises from 0.1 to 100 w/w of the formulation.
  • formulations of the present invention may include other agents known to those skilled in the art of pharmacy, having regard for the type of formulation in issue.
  • formulations suitable for oral administration may include flavouring agents and formulations suitable for intranasal administration may include perfumes.
  • the potential of a compound of the invention as a drug candidate can be tested using various assays known in the art.
  • FXR its activity and selectivity can be evaluated using AlphaScreen (biochemical assay); gene expression can be evaluated using RT-PCR (FXR target gene); and cytotoxicity (e.g., HepG2) can be evaluated using ATP content, LDH release, and Caspase-3 activation.
  • TGR5 For the in vitro validation for TGR5 : its activity and selectivity can be evaluated using HTR-FRET (cell-based assay); gene expression can be evaluated using RT-PCR (TGR5 target gene (i.e., cFOS)); and cytotoxicity (e.g., HepG2) can be evaluated using ATP content, LDH release, and Caspase-3 activation.
  • RT-PCR TGR5 target gene (i.e., cFOS)
  • cytotoxicity e.g., HepG2
  • the ADME absorption, distribution, metabolism, and excretion
  • /pharmacokinetic properties and in vivo validation of compounds of the invention can also be studied using methods known in the art.
  • Reagents and conditions a) 1) MeOH, p-TSA, ultrasound, 3 h, quantitative; 2) Ac 2 0, NaHC0 3 , THF, reflux 12 h, 85%; b) PCC, CH 2 C1 2 , 6 h, 62%; c) Ac 2 0, Bi(OTf) 3 , CH 2 C1 2 , 1 h, 91%; d) Br 2 , Benzene, 30 °C overnight, 74%; e) NaBH 4 , NaOAc, Pyr, r.t. 2 days, 80%; f) HI 57%, AcOH, r.t. 30 min; g) Cr0 3 , AcOH, r.t.
  • 6-ECA 6a-ethyl-cholic acid
  • 6-ECA (1) was treated with p- TSA in MeOH under ultrasound irradiation to give the corresponding methyl ester, which was selectively protected at the C3 position by refluxing with Ac 2 0 in the present of NaHC0 3 in THF to afford compound 2.
  • compound 7 was reduced with sodium in sec- uOH at 50 °C to give Compound 101 (about 70%> yield), after purification.
  • Example 2 Compound 100 is a potent, specific FXR agonist
  • NRs ligand-bound nuclear receptors
  • AF-2 activation function 2
  • NR box nuclear receptor boxes
  • AlphaScreen was used with the aim of identify novel modulators by taking advantage of the bimolecular interaction prevailing between FXR and the LXXLL motif present in the NR box of the steroid receptor coactivator 1 (SRC-1).
  • FXR activation by Compound 100 was also tested in cell-based transactivation assays with the use of HEK293T cell line transiently transfected with Gal4-FXR-LBD chimera and the (UAS)5-Luc system ( Figure 1). FXR activation by Compound 100 was comparable to that induced by compound A indicating that these compounds are potent FXR agonists in cell-based assays.
  • Figure 1 is a graph showing the activity of Compound 100 in comparison to compound A in a transactivation assay in HEK293T cells.
  • NT is FXR vector-transfected cells without exposure to compound A or Compound 100. Values are represented in ⁇ .
  • Bile acids modulate not only several nuclear hormone receptors, but are also agonists for the G protein-coupled receptor (GPCR) TGR5 ( Makishima M, et al, Science 1999; 284: 1362-1365; Parks DJ, et al, Science 1999; 284: 1365-1368; Maruyama T, et al, Biochem Biophys Res Commun 2002; 298:714-719; Kawamata Y, et al, J Biol Chem 2003; 278:9435-9440).
  • GPCR G protein-coupled receptor
  • TGR5 To evaluate the capacity of a compound of the invention to activate TGR5, Compound 100 and other comparison compounds were screened for an increase of intracellular cAMP as a read-out for TGR5 activation.
  • Human enteroendocrine NCI-H716 cells constitutively expressing TGR5 were exposed to increasing concentrations of Compound 100, and intracellular cAMP levels were measured by TR- FRET.
  • Lithocholic acid (LCA) was used as positive control.
  • FIG. 2A is a graph showing the TGR5 activity of Compound 100 (no activity) and LCA in human enteroendocrine cells expressing TGR5 at physiological level. Results are shown as the mean ⁇ S. D. of triplicate samples from a representative experiment of three performed.
  • Figure 2B is a graph showing the TGR5 activity of Compound 100 (no activity) and LCA in human Chinese hamster ovary (CHO) cells over-expressing TGR5.
  • HepG2 cells were selected as a relevant cell line to determine whether a compound of the invention can regulate the endogenous FXR genetic network.
  • the ability of a compound of the invention to induce FXR target genes was assessed by isolating total RNA from cells treated overnight with ⁇ of compounds A, B, and 100.
  • Compound A is established as a potent FXR selective agonist and compound B is established as a dual potent FXR/TGR5 agonist.
  • Compound 100's gene activation profile in HepG2 cells was compared to the profiles of compounds A and B. (Pellicciari, R, et al., J Med Chem. 2002; Aug 15; 45: 3569-72; Rizzo, G, et al., Mol. Pharm., 2010; 78: 617-630).
  • FXR regulates the expression of several target genes involved in BA homeostasis.
  • FXR plays a central role in several metabolic pathways, including i.e., lipid metabolism, bile-acids metabolism, and carbohydrate metabolism.
  • the genes encoding proteins involved in lipid metabolism include, e.g., APOCII, APOE, APOAI, SREBP-1C, VLDL-R, PLTP, and LPL;
  • the genes encoding proteins involved in bile-acids metabolism include, e.g., OSTa/ ⁇ , BSEP, MRP2, SHP, CYP7A1, FGF19, SULT2A1, and UGT2B4;
  • the genes encoding proteins involved in carbohydrate metabolism include, e.g., PGCla, PEPCK, and GLUT2.
  • Compound 100 activation of FXR indirectly represses the expression of the BA biosynthetic enzymes CYP7A1 by increasing the levels of the nuclear receptor SHP in the liver and intestine and increasing the level of FGF19 (Goodwin, B, et al, Mol. Cell 2000; 6: 517-526).
  • Compound 100 activated FXR also positively regulates the expression of genes encoding proteins involved in the transport of BA, including, BSEP, and OSTa and OSTp. Newly synthesized BAs are conjugated with taurine or glycine and then actively secreted in the gall bladder, FXR regulates both of these critical processes.
  • Monoanionic- and dianionic-conjugated BAs are then actively secreted in the gall bladder by BSEP and the multidrug related protein 2 (MRP2), respectively.
  • MRP2 multidrug related protein 2
  • the regulation of these ABC transporters is of critical importance in order to avoid BA accumulation in the liver and consequent hepatic injury (Schinkel AH, et al., Mammalian drug efflux transporters of the ATP binding cassette (ABC) family: an overview. Adv Drug Deliv Rev. 2012; Sep 13).
  • Figure 3 are a series of graphs showing the activity of Compound 100 and other comparison compounds in regulating expression of OSTa (A), OSTP (B), BSEP (C), MRP2 (D), CYP7A1 (E), SHP (F), FGF-19 (G), and UGT2B4 (H).
  • OSTa OSTa
  • B OSTP
  • C BSEP
  • MRP2 D
  • E CYP7A1
  • E SHP
  • F FGF-19
  • UGT2B4 UGT2B4
  • FXR activation contributes to reverse cholesterol transport, a process that results in the delivery of cholesterol from peripheral tissues to the liver for biliary disposal and consequent fecal elimination (Lambert, G, et al., J Biol Chem 2003; 278, 2563-70).
  • FXR regulates the expression of phospholipids transfer protein (PLTP), responsible for the transfer of phospholipids and cholesterol from LDL to HDL, hepatic lipoproteins, such as ApoE, ApoC-I, ApoC-IV, and scavenger receptor Bl(SRBl), which is involved in the hepatic uptake of HDL.
  • PLTP phospholipids transfer protein
  • ApoE ApoC-I
  • ApoC-IV ApoC-IV
  • SRBl scavenger receptor Bl
  • FXR controls triglyceride (TG) metabolism by regulating hepatic de novo lipogenesis and triglyceride clearance.
  • FXR down regulates the expression of SREBP-lc, a transcription factor that plays a critical role in stimulating fatty acid synthesis and lipogenesis ( Figures 4A-4D) (Landrier, JF, et al., J Clin Invest 2004; 113, 1408-18).
  • FXR activation also modulates TG clearance.
  • FIGS. 4 are a series of graphs showing the activity of Compound 100 and other comparison compounds in regulating PLTP involved in lipid metabolism (A), SREBP-1C (B), APOCII (C), and PPARy (D). Note in the Figures 4A-4D, the y-axis displays folds change in expression relative to not treated cells. The data were normalized relative to B2M. The error bars display the standard error of the three replicates.
  • FXR may also have a role in carbohydrate metabolism.
  • PEPCK gene regulation was studied (Figure 5) using Compound 100.
  • Figure 5 is a graph showing the regulation of Compound 100 and other comparison compounds on PEPCK gene. The y-axis displays folds change in expression relative to not treated cells. The data were normalized relative to B2M. The error bars display the standard error of the three replicates.
  • Example 4 Compound 100 does not exert cytotoxic effects in HepG2 cells.
  • Adenosine Triphosphate (ATP) nucleotide represents the source of energy at the basic molecular level, as it is a multifunctional molecule that is used in every cell as a coenzyme and is an integral part of the mitochondrial DNA (Kangas L, et al., Medical Biology, 1984; 62, 338-343; Crouch SPM, et al, J. Immunol. Methods, 1993; 160, 81 - 88; Petty RD, et al., J. Biolumin. Chemilumin. 1995; 10, 29 - 34).
  • ATP Adenosine Triphosphate
  • Cell viability was determined as measure of intracellular ATP related to the time of exposure and concentration of the test compounds (Sussman, NL.; Promega Cell Notes, Issue 3. 2002).
  • Figure 6 is a graph showing the measurement of ATP in HepG2 cells, treated with the indicated concentrations of compounds for 4 h. It demonstrated that all cells in presence of different concentrations of Compound 100 were viable as cells treated with the vehicle alone, i.e., all cells treated with Compound 100 remain viable (100%).
  • LCA a well-known cytotoxic bile acid, was used as comparator and Tamoxifen was used as positive controls for the assays.
  • An additional method to determine the viability of cells is to detect the integrity of the membrane that defines the cellular compartmentalization. Measuring the leakage of components out of the cytoplasm, in damaged cell membranes, indicates loss of membrane integrity, and LDH release is the method used to determine common toxicity in cells. HepG2 cells were treated with Compound 100, serial dilutions were performed, LCA dilutions were added to the plated cells as assay control together with no-cell and untreated cells. The assay was performed in triplicate for each test compound concentration.
  • Example 5 Compound 100 does not inhibit cytochrome P450 enzymes.
  • the six main CYP450 isoforms (CYP1A2, CYP2C9, CYP2C19, CYP2D6, CYP2E1 , CYP3A4) were investigated. (Obach, RS, et al., J Pharmcol Exp Ther, 2006; 316(1): p. 336-48).
  • Compound 100 was analyzed by its capacity to inhibit (or not) the production of a fluorescent signal, using recombinant CYP450 proteins (baculosomes; Invitrogen), substrates and inhibitors (Bidstrup, TB, et al., Br J Clin Pharmacol, 2003; 56(3): p. 305-14). As a positive control, a selective inhibitor for each CYP450 isoform was tested in the same plate (Table 5).
  • IC 50 > 10 ⁇ means that the compound does not inhibit the CYP450.
  • the results obtained demonstrated that Compound 100, like compounds A and B, does not inhibit the Cytochrome P450 enzymes tested, showing that Compound 100 is not likely to be influenced by drug-drug interaction effects. (Rizzo, G, et al., Mol Pharm, 2010; 78: 617-630).
  • Example 6 Compound 100 does not inhibit human ERG potassium channel
  • PredictorTM hERG Fluorescence Polarization assay was employed as it provides an efficient method for an initial determination of the propensity of test compounds to block the hERG channel (Dorn, A, et al. J Biomol Screen, 2005; 10(4): 339-47).
  • the assay is based on the assumption that the hERG potassium channel activity contributes to the resting membrane potential in permanently transfected cells, and thus a block of hERG channels should result in a depolarization of the cell membrane.
  • the assay was designed to identify potential hERG channel blockers by producing data that accurately correlates with patch-clamp electrophysiology studies. Results from the Predictor assay demonstrate a high correlation with those obtained from patch clamp techniques (Table 6) (Dorn, A, et al. J Biomol Screen, 2005; 10(4): 339-47).
  • Table 6 show the comparison of IC 50 values generated with the Predictor hERG Fluorescence Polarization assay with reported IC 50 values from patch-clamp and radioligand displacment assays.
  • Membrane preparations from Chinese hamster ovary cells stably transfected with hERG potassium channel were used to evaluate the potential inhibitory effect of Compound 100 on this channel using the Predictor fluorescence polarization assay. Reduction of membrane polarization as a result of inhibition of the hERG potassium channel is directly correlated with a reduction of the fluorescence polarization (FP). The results show that like compounds A and B, Compound 100 does not block or inhibit the hERG potassium channel.
  • the assay was performed in triplicate by using a 16-point dose-response of test compound and the positive controls E-4031 and Tamoxifen.
  • the assay window more than 100 mP (millipolarization) is considered good.
  • Z' value was 0.78 indicates an excellent assay.
  • the non-linear regression curves were obtained by GraphPad Prism (GraphPad Software Inc.) analysis, to calculate the IC 50 values.
  • Compound 100 showed no activity against other nuclear receptors and did not active the bile acid GPCR TGR5. In addition to high nuclear receptor selectivity, Compound 100 possesses a pharmacological profile suitable for a drug candidate. Compound 100 shows no cytotoxic effect on human HepG2 liver cells, indicating a lack of liver toxicity, and does not inhibit any of the CYP450 enzymes tested, indicating that Compound 100 is devoid of significant drug-drug interaction risk. Further, Compound 100 does not inhibit the human ERG potassium channel.
  • Physiochemical properties of Compound 100 such as water solubility, critical micellular concentration, surface tension and LogP A were determined using methods known in the art. These properties of Compound 100 were compared with natural and synthetic analogues (Table 7).
  • Figure 7A is a graph showing the choleretic effect of Compound 100 for id and iv administration.
  • Figure 7B is a graph showing the secretion of Compound 100 over time for id and iv administration.
  • Figure 7C is a graph showing the plasma concentration of Compound 100 over time.

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Abstract

The present invention provides a compound of formula (I) or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof, wherein R1 is a hydroxy group and R2, R3, R4, R5, and R6 are as described herein. The present invention relates generally to selective FXR agonists and to methods of making and using them.

Description

1 1 -HYDROXYL-DERIVATIVES OF BILE ACIDS AND AMINO ACID CONJUGATES THEREOF AS FARNESOID X RECEPTOR MODULATORS
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority to, and the benefit of, U.S. S.N. 61/823,169, filed on May 14, 2013, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
FXR is a member of the nuclear receptor family of ligand-activated transcription factors that includes receptors for the steroid, retinoid, and thyroid hormones (D.J.
Mangelsdorf, et al, Cell 83:841-850 (1995)). Northern and in situ analysis show that FXR is most abundantly expressed in the liver, intestine, kidney, and adrenal (B.M. Forman, et al, Cell 81 :687-693 (1995) and W. Seol, et al., Mol. Endocrinnol. 9:72-85 (1995)). FXR binds to DNA as a heterodimer with the 9-cis retinoic acid receptor (RXR). The rat FXR is activated by micromolar concentrations of farnesoids such as farnesol and juvenile hormone (B.M. Forman, et al, Cell 81 :687-693 (1995)). However, these compounds failed to activate the mouse and human FXR, leaving the nature of the endogenous FXR ligands in doubt. Several naturally-occurring bile acids {e.g., chenodeoxycholic acid (CDCA), deoxycholic acid (DCA), lithocholic acid (LCA), and the taurine and glycine conjugates thereof) serve as FXR ligands and bind to and activate FXR at physiological concentrations (WO 00/37077).
Bile acids are cholesterol metabolites that are formed in the liver and secreted into the duodenum of the intestine, where they have important roles in the solubilization and absorption of dietary lipids and vitamins. Most bile acids (-95%) are subsequently reabsorbed in the ileum and returned to the liver via the enterohepatic circulatory system. The conversion of cholesterol to bile acids in the liver is under feedback regulation: bile acids down-regulate the transcription of cytochrome P450 7a (CYP7a), which encodes the enzyme that catalyzes the rate limiting step in bile acid biosynthesis. It is suggested that FXR is involved in the repression of CYP7a expression by bile acids (D.W. Russell, Cell 97:539-542 (1999)). In the ileum, bile acids induce the expression of the intestinal bile acid binding protein (IBABP), which binds bile acids with high affinity and may be involved in their cellular uptake and trafficking. It is demonstrated that bile acids mediate their effects on IBABP expression through activation of FXR, which binds to an IR-1 type response element that is conserved in the human, rat, and mouse IBABP gene promoters. Thus, FXR is involved in both the stimulation (IBABP) and the repression (CYP7a) of target genes involved in bile acid and cholesterol homeostasis. Accordingly, there is a need for FXR modulators suitable for drug development. The present invention addresses this need.
SUMMARY OF THE INVENTION
The invention provides compounds and methods of preparing these compounds.
Specifically, the invention provides a compound of formula I:
Figure imgf000003_0001
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof, wherein R1, R2, R3, R4, R5 and R6 are as described herein. The compounds of the invention are useful for treating and preventing diseases and conditions.
The invention also provides a pharmaceutical composition comprising a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof, and a pharmaceutically acceptable carrier or excipient.
The invention also provides a method for the treatment or prevention of a disease and condition, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the disease or condition is FXR-mediated.
The invention also provides for the manufacture of a medicament for treating or preventing a disease or condition (e.g., a disease or condition mediated by FXR), wherein the medicament comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
The invention also provides a composition for use in a method for treating or preventing a disease or condition (e.g., a disease or condition mediated by FXR), wherein the composition comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the specification, the singular forms also include the plural unless the context clearly dictates otherwise. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods and materials are described below. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference. The references cited herein are not admitted to be prior art to the claimed invention. In the case of conflict, the present specification, including definitions, will control. In addition, the materials, methods, and examples are illustrative only and are not intended to be limiting.
Other features and advantages of the invention will be apparent from the following detailed description and claims. BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a graph showing the activity of a compound of the invention and a comparison compound in a transactivation assay in HEK293T cells
Figure 2 is a series of graphs showing the lack of TGR5 activity of a compound of the invention in human enteroendocrine cells expressing TGR5 at physiological level (A) and in human Chinese hamster ovary (CHO) cells over-expressing TGR5 (B).
Figure 3 is a series of graphs showing the activity of a compound of the invention and other comparison compounds in regulating expression of OSTa (A), ΟΞΤβ (B), BSEP (C), MRP2 (D), CYP7A1 (E), SHP (F), FGF-19 (G), and UGT2B4 (H).
Figure 4 is a series of graphs showing the activity of a compound of the invention and other comparison compounds in regulating PLTP involved in lipid metabolism (A), SREBP- 1C (B), APOCII (C), and PPARy (D).
Figure 5 is a graph showing the regulation of a compoundd of the invention and other comparison compounds on PEPCK gene.
Figure 6 is a graph showing the measurement of ATP in HepG2 cells, treated with the indicated concentrations of a compound of the invention for 4 h.
Figure 7 is a series of graphs showing the choleretic effect of Compound 100 for id and iv administration (A), the secretion of Compound 100 over time for id and iv administration (B), and the plasma concentration of Compound 100 over time (C).
DETAILED DESCIRPTION OF THE INVENTION
Compounds of the invention
The present invention relates to a compound of formula I:
Figure imgf000005_0001
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof, wherein:
R1 is hydroxyl;
R2 is hydrogen, hydroxyl, alkyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more Ra;
R3 is hydrogen, hydroxyl, alkyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more Rb;
R4 is hydrogen, alkyl, alkenyl, alkynyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more Rc;
Ra, Rb, and Rc are each independently halogen or hydroxyl;
R5 is hydroxyl, OS03H, OS03 ", OCOCH3, OP03H, OP03 2~, or hydrogen; and
R6 is hydroxyl, OS03H, OS03 ~, OCOCH3, OP03H, OP03 2~, or hydrogen;
or taken together R5 and R6 with the carbon atom to which they are attached form a carbonyl.
In one aspect, the present invention relates to a compound formula II:
Figure imgf000005_0002
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the present invention relates to a compound of formula III:
Figure imgf000005_0003
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the present invention relates to a compound of formula IV:
Figure imgf000006_0001
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is the compound (e.g. , the native compound, or the compound in the non-salt, unsolvateed, and non-conjuated form).
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is the pharmaceutically acceptable salt.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is the amino acid conjugate. In one aspect, the amino acid conjugate is a glycine conjugate. In one aspect, the amino acid conjugate is a taurine conjugate.
In one aspect, the present invention relates to a compound of formula I, wherein one of R2 or R3 is hydroxyl or halogen and the remaining R2 or R3 is hydrogen or unsubstituted alkyl. In one aspect, one of R2 or R3 is hydroxyl and the remaining R2 or R3 is hydrogen.
In one aspect, the present invention relates to a compound of formula I, wherein one of R5 or R6 is hydroxyl and the remaining R5 or R6 is hydrogen.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein R2 is hydroxyl or halogen. In one aspect, R2 is hydroxyl. In another aspect, R2 is halogen.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein R3 is hydrogen or unsubstituted alkyl. In one aspect, R3 is hydrogen. In another aspect, R3 is methyl.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein R2 is hydroxyl and R3 is hydrogen.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein R5 is hydroxyl.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein R6 is hydrogen.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein R2 and R5 are each hydroxyl and R3 and R6 are each hydrogen. In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein R4 is alkyl or hydrogen. In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein R4 is unsubstituted alkyl. In one aspect, R4 is methyl, ethyl, propyl, or butyl. In one aspect, R4 is methyl or ethyl. In one aspect, R4 is methyl. In one aspect, R4 is ethyl.
In one aspect, the present invention relates to compound
Figure imgf000007_0001
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is an FXR agonist. In one aspect, the compound of the invention is a highly potent FXR agonist. For example, the compound of the invention activates FXR at a concentration below 1 μΜ, below 0.8 μΜ, below 0.6 μΜ, below 0.4 μΜ, or below 0.2 μΜ (e.g. , as measured by an AlphaScreen assay), as compared to 15 μΜ for CDC A. For example, the compound of the invention activates FXR at a concentration below 0.2 μΜ (e.g., as measured by an AlphaScreen assay). For example, the compound of the invention activates FXR with an EC5o below 1 μΜ, below 0.8 μΜ, below 0.6 μΜ, below 0.4 μΜ, or below 0.2 μΜ (e.g. , as measured by an AlphaScreen assay), as compared to 8.9 μΜ for CDCA. For example, the compound of the invention activates FXR with an EC50 below 0.2 μΜ (e.g. , as measured by an AlphaScreen assay).
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound is not active against other nuclear receptors. In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound does not activate TGR5 (e.g. , as measured by an HTR-FRET TGR5 assay, where the TGR5 is either expressed at a physiological level or overexpressed).
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound induces apoptosis.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound shows no cytotoxic effect on human HepG2 liver cells (e.g. , as measured by an LDH release assay or an intracellular ATP assay). In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound does not inhibit one or more CYP450 iso forms selected from
CYP1A2, CYP3A4 (green substrate), CYP3A4 (blue substrate), CYP2C9, CYP2C19, CYP2D6, and CYP2E1. For example, the compounds of the invention have an IC50 greater than 10 μΜ as measured by CPY450 inhibition assay.
In one aspect, the present invention relates to a compound of formula I, II, III, or IV, wherein the compound does not inhibit the human ERG potassium channel.
In one aspect, the present invention relates to a method of synthesizing a compound of the invention, or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the present invention relates to a kit containing one or more compounds of the invention, or a pharmaceutically acceptable salt, solvate, or amino acid conjutate thereof. In one aspect, the kit further contains a pharmaceutically acceptable ingredient.
In one aspect, the present invention relates to a pharmaceutical composition comprising a compound of the invention and a pharmaceutically acceptable excipient.
One technical problem to be solved by the present invention is the identification of novel compounds that are agonists of the nuclear hormone farnesoid X receptor (FXR), which represents an attractive target for the treatment of metabolic and chronic liver diseases. It is well known that natural bile acids modulate not only several nuclear hormone receiptors, but are also agonists for the G protein-coupled receptor (GPCR) TGR5. Selectivity can be a problem for drug compounds directed to modulating a nuclear hormone receptor. It is therefore an objective of the present invention to provide a compound that is a specific FXR agonist, for example, a compound that shows no activity against other nuclear receptors or a compound that does not activate the bile acid GPCR TGR5. Other problems in the development of a drug compound include a non-suitable pharmacokinetic profile, safety issues such as toxicity (e.g., liver) and undesirable drug-drug interactions. Accordingly, further objectives of the present invention are to provide compounds that do not suffer from the aforementioned technical problems, i.e. , a compound that has a suitable pharmacokinetic profile, a compound that does not exert a cytotoxic effect on cells, a compound that does not inhibit cytochrome P450 enzymes, and/or a compound that does not inhibit hERG.
The patent and scientific literature referred to herein establishes knowledge that is available to those with skill in the art. The issued patents, applications, and references that are cited herein are hereby incorporated by reference to the same extent as if each was specifically and individually indicated to be incorporated by reference. In the case of inconsistencies, the present disclosure will prevail. For purposes of the present invention, the following definitions will be used (unless expressly stated otherwise).
The general chemical terms used throughout have their usual meanings. For example, the term alkyl refers to a branched or unbranched saturated hydrocarbon group. The term "n- alkyl" refers to an unbranched alkyl group. The term "Cx-Cy alkyl" refers to an alkyl group having between x and y carbon atoms, inclusively, in the branched or unbranched
hydrocarbon group. By way of illustration, but without limitation, the term "Ci-Cs alkyl" refers to a straight chain or branched hydrocarbon moiety having 1, 2, 3, 4, 5, 6, 7, or 8 carbon atoms. "Ci-C6" refers to a straight chain or branched hydrocarbon moiety having 1, 2, 3, 4, 5, or 6 carbon atoms. "C1-C4 alkyl" refers to a straight chain or branched hydrocarbon moiety having 1, 2, 3, or 4 carbon atoms, including methyl, ethyl, w-propyl, isopropyl, n- butyl, isobutyl, sec-butyl, and ie/t-butyl. The term "C1-C4 w-alkyl" refers to straight chain hydrocarbon moieties that have from 1, 2, 3, or 4 carbon atoms including methyl, ethyl, n- propyl, and w-butyl. The term "C3-C6 cycloalkyl" refers to cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl. The term "C3-C7 cycloalkyl" also includes cycloheptyl. The term "C3-C8 cycloalkyl" also includes cyclooctyl. Cycloalkylalkyl refers to cycloalkyl moieties linked through an alkyl linker chain, as for example, but without limitation, cyclopropylmethyl, cyclopropylethyl, cyclopropylpropyl, cyclopropylbutyl,
cyclobutylmethyl, cyclobutylethyl, cyclobutylpropyl, cyclopentylmethyl, cyclopentylethyl, cyclopentylpropyl, cyclohexylmethyl, cyclohexylethyl, and cyclohexylpropyl. Each alkyl, cycloalkyl, and cycloalkylalkyl group may be optionally substituted as specified herein.
The term "C4-C8 cycloalkenyl" refers cyclobutenyl, cyclopentyl, cyclohexenyl, cycloheptenyl, and cyclooctenyl rings having one or more sites of unsaturation, e.g., one or more double bonds.
The term "halogen" refers to fluoro, chloro, bromo, or iodo.
The term "hydroxyl" means OH.
It will be understood that "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, etc. As used herein, the term "substituted" is contemplated to include all permissible substituents of organic compounds unless otherwise specified. In a broad aspect, the permissible substituents include acyclic and cyclic, branched and unbranched, carbocyclic and heterocyclic, aromatic and nonaromatic substituents of organic compounds. The permissible substituents can be one or more and the same or different for appropriate organic compounds. For purposes of this invention, the 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.
The term "pharmaceutical" or "pharmaceutically acceptable" when used herein as an adjective, means substantially non-toxic and substantially non-deleterious to the recipient.
By "pharmaceutical formulation" it is further meant that the carrier, solvent, excipient, and salt must be compatible with the active ingredient of the formulation (e.g., a compound of the invention). It is understood by those of ordinary skill in this art that the terms "pharmaceutical formulation" and "pharmaceutical composition" are generally interchangeable, and they are so used for the purposes of this application.
Suitable pharmaceutically acceptable salts according to the invention will be readily determined by one skilled in the art and will include, for example, basic salts such as alkali or alkaline-earth metallic salts made from aluminium, calcium, lithium, magnesium, potassium, sodium, and zinc or organic salts made from Ν,Ν'-dibenzylethylenediamine, chlorprocaine, choline, diethanolamine, ethylenediamine, meglumine (N-methylglucamine), and procaine. Salts with pharmaceutically acceptable amines such as lysine, arginine, tromethamine, triethylamine and the like can also be used. Such salts of the compounds of the invention may be prepared using conventional techniques, from the compound of the invention by reacting, for example, the appropriate base with the compound of the invention.
When used in medicine, the salts of a compound of the invention should be pharmaceutically acceptable, but pharmaceutically unacceptable salts may conveniently be used to prepare the corresponding free base or pharmaceutically acceptable salts thereof.
As used herein, the term "amino acid conjugate" refers to a conjugate of a compound of the invention with any suitable amino acid. In one aspect, such suitable amino acid conjugate of a compound of the invention will have the added advantage of enhanced integrity in bile or intestinal fluids. The present invention encompasses the glycine and taurine conjugates of any of the compounds of the invention. For example, the glycine and the taurine conjugates of a compound of formula I have the following formula:
Figure imgf000011_0001
(glycine) (taurine)
In one aspect, the glycine and taurine conjuates of a compound of the invention may be a pharmaceutically acceptable salt thereof. The amino acid conjugates of compounds of the invention can be prepared according to methods known in the art. For example, the free acid can be coupled to the glycine or taurine amino acid using standard peptide coupling conditions.
In one aspect, the sodium salt of the taurine conjugate of Compound 100 can be prepar as follows.
Figure imgf000011_0002
compound 100 taurine conjugate of compound 100
Compound 100 is treated with a base (e.g. , Et3N) and taurine in a polar protic solvent (e.g. , EtOH). The resulting mixture can be treated with a coupling reagent (e.g. , DMT -MM (4-(4,6-Dimethoxy-l ,3,5-triazin-2-yl)-4-methylmorpholinium chloride)). The reaction mixture can be concentrated and dissolved in a base (e.g., 3% w/v aqueous solution of NaOH). The resulting reaction mixture can be extracted with an organic solvent (e.g.,
AcOEt). The aqueous phase can be concentrated and filtered on a silica pad, eluting first with, e.g., H20 (until neutral pH) and then with, e.g., H20/MeOH 80:20 v/v to give the taurine conjugate of Compound 100. Suitable amino acids include but are not limited to glycine and taurine.
Some of the compounds of the present invention may exist in unsolvated as well as solvated forms such as, for example, hydrates.
The present invention provides methods for the synthesis of the compounds of invention described herein. The present invention also provides detailed methods for the synthesis of various disclosed compounds of the invention according to the following schemes as shown in the examples.
The synthetic processes of the invention can tolerate a wide variety of functional groups, therefore various substituted starting materials can be used. The processes generally provide the desired final compound at or near the end of the overall process, although it may be desirable in certain instances to further convert the compound to a pharmaceutically acceptable salt, ester or prodrug thereof.
Compounds of the invention can be prepared in a variety of ways using commercially available starting materials, compounds known in the literature, or from readily prepared intermediates, by employing standard synthetic methods and procedures either known to those skilled in the art, or which will be apparent to the skilled artisan in light of the teachings herein. Standard synthetic methods and procedures for the preparation of organic molecules and functional group transformations and manipulations can be obtained from the relevant scientific literature or from standard textbooks in the field. Although not limited to any one or several sources, classic texts such as Smith, M. B., March, J., March's Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, 5th edition, John Wiley & Sons: New York, 2001; and Greene, T.W., Wuts, P.G. M., Protective Groups in Organic Synthesis, 3rd edition, John Wiley & Sons: New York, 1999, incorporated by reference herein, are useful and recognized reference textbooks of organic synthesis known to those in the art. The following descriptions of synthetic methods are designed to illustrate, but not to limit, general procedures for the preparation of compounds of the present invention.
All the abbreviations used in this application are found in "Protective Groups in Organic Synthesis" by John Wiley & Sons, Inc, or the MERCK INDEX by MERCK & Co., Inc, or other chemistry books or chemicals catalogs by chemicals vendor such as Aldrich, or according to usage know in the art.
Scheme 1
Figure imgf000013_0001
compound 101
Reagents and conditions: a) 1) MeOH, p-TSA, ultrasound, 3 h, quantitative; 2) Ac20, NaHC03, THF, reflux 12 h, 85%; b) PCC, CH2C12, 6 h, 62%; c) Ac20, Bi(OTf)3, CH2C12, 1 h, 91%; d) Br2, Benzene, 30 °C overnight, 74%; e) NaBH4, NaOAc, Pyr, r.t. 2 days, 80%; f) HI 57%, AcOH, r.t. 30 min; g) Cr03, AcOH, r.t. 45 min; h) Zn dust, NaOAc, reflux 20 min; i) NaOH 2M, MeOH, r.t. overnight, 65% from compound 5; 1) NaBH4, THF/H20 4: 1, 70%; m) Na(s), sec-BuOH, 50 °C, 70%.
The synthesis is based on the use of 6a-ethyl-cholic acid (6-ECA, 1) as starting material which was prepared using methods known in the art. 6-ECA (1) was treated with p- TSA in MeOH under ultrasound irradiation to give the corresponding methyl ester, which was selectively protected at the C3 position by refluxing with Ac20 in the present of NaHC03 in THF to afford compound 2. Treating compound 2 with PCC in CH2C12 at room temperature followed by treatment with Ac20, Bi(OTf)3 in CH2C12 at room temperature afforded the intermediate methyl 3 ,7a-diacetoxy-12-oxo-5P-cholan-24-oate (compound 3; about 48%o from compound 2). Treatment of compound 3 with Br2 in benzene for e.g., 12 h yielded compound 4. Reaction of compound 4 with NaBH4 and NaOAc in freshly distilled pyridine gave the corresponding 11β-12β epoxide (compound 5), in about 59% yield after silica gel
purification. The reaction of compound 5 with HI in AcOH at room temperature afforded the halohydrine intermediate which were then oxidized at CI 1 position with Cr03 in AcOH to generate compound 6. Reaction of compound 6 with Zn dust in boiling AcOH and alkali hydrolysis (NaOH/MeOH) afforded 3a,7a-hydroxy-12-keto-513-cholan-24-oic acid
(compound 7; about 65% yield from compound 5).
Compound 7 was stereoselectively reduced at the CI 1-carbonyl using NaBH4 in a mixture of THF/H20= (4: 1, v/v) to give 3 ,7α, 11 P-trihydroxy-6a-ethyl-5 P-cholan-24-oic acid (Compound 100; about 27% from compound 3), after chromatographic purification to afford Compound 100. Alternatively, compound 7 was reduced with sodium in sec- uOH at 50 °C to give Compound 101 (about 70%> yield), after purification.
"Solvate" means a solvent addition form that contains either a stoichiometric or non stoichiometric amounts of solvent. Some compounds have a tendency to trap a fixed molar ratio of solvent molecules in the crystalline solid state, thus forming a solvate. If the solvent is water the solvate formed is a hydrate; when the solvent is alcohol, the solvate formed is an alcoholate. Hydrates are formed by the combination of one or more molecules of water with one of the substances in which the water retains its molecular state as H20, such combination being able to form one or more hydrate.
The term "suitable solvent" refers to any solvent, or mixture of solvents, inert to the ongoing reaction that sufficiently solubilizes the reactants to afford a medium within which to effect the desired reaction.
The compounds described herein can have asymmetric centers. Compounds of the present invention containing an asymmetrically substituted atom can be isolated in optically active or racemic forms. It is well known in the art how to prepare optically active forms, such as by resolution of racemic forms or by synthesis from optically active starting materials. Many geometric isomers of olefins, C=N double bonds, and the like can also be present in the compounds described herein, and all such stable isomers are contemplated in the present invention. Cis and trans geometric isomers of the compounds of the present invention are described and can be isolated as a mixture of isomers or as separate isomeric forms. All chiral, diastereomeric, racemic, and geometric isomeric forms of a structure are intended, unless specific stereochemistry or isomeric form is specifically indicated. All processes used to prepare compounds of the present invention and intermediates made therein are considered to be part of the present invention. All tautomers of shown or described compounds are also considered to be part of the present invention. Furthermore, the invention also includes metabolites of the compounds described herein.
The invention also comprehends isotopically-labeled compounds, which are identical to those recited in the formulae of the invention, but for the fact that one or more atoms are replaced by an atom having an atomic mass or mass number different from the atomic mass or mass number most commonly found in nature. Examples of isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, fluorine, such as 3H, UC, 14C, 2H, and 18F.
Compounds of the present invention and pharmaceutically acceptable salts, solvates or amino acid conjugates thereof that contain the aforementioned isotopes and/or other isotopes of other atoms are within the scope of the present invention. Isotopically-labeled compounds of the present invention, for example those into which radioactive isotopes such as 3H and 14C are incorporated, are useful in drug and/or substrate tissue distribution assays. Tritiated, i.e., 3H, and carbon- 14, i.e., 14C, isotopes are particularly preferred for their ease of preparation and detectability. nC and 18F isotopes are particularly useful in PET (positron emission tomography). PET is useful in brain imaging. Further, substitution with heavier isotopes such as deuterium, i.e., 2H, can afford certain therapeutic advantages resulting from greater metabolic stability, for example increased in vivo half-life or reduced dosage requirements and, hence, may be preferred in some circumstances. Isotopically labeled compounds of this invention can generally be prepared through techniques known in the art, such as by carrying out the procedures disclosed in the Schemes and/or in the Examples below, by substituting a readily available isotopically labeled reagent for a non-isotopically labeled reagent. In one embodiment, the compounds of the invention, salts, hydrates, solvates, or amino acid conjugates thereof are not isotopically labelled.
When any variable (e.g., Rx) occurs more than one time in any constituent or formula for a compound, its definition at each occurrence is independent of its definition at every other occurrence. Thus, for example, if a group is shown to be substituted with one or more Rx moieties, then Rx at each occurrence is selected independently from the definition of Rx. Also, combinations of substituents and/or variables are permissible, but only if such combinations result in stable compounds within a designated atom's normal valency.
As used herein, the term "treat," "treating," or "treatment" is meant decreasing the symptoms, markers, and/or any negative effects of a condition in any appreciable degree in a subject who currently has the condition. In some embodiments, treatment may be administered to a subject who exhibits only early signs of the condition for the purpose of decreasing the risk of developing the disease or condition.
As used herein, the term "prevent," "prevention," or "preventing" refers to any method to partially or completely prevent or delay the onset of one or more symptoms or features of a disease, disorder, and/or condition. Prevention may be administered to a subject who does not exhibit signs of a disease or condition.
As used herein, "subject" means a human or animal (in the case of an animal, more typically a mammal). In one aspect, the subject is a human. Such subject can be considered to be in need of treatment with an FXR agonist.
As used herein, "unsaturated" refers to compounds or structures having at least one degree of unsaturation (e.g., at least one double or triple bond).
As used herein, the term "a compound of the invention" includes a compound of any of formulae I, II, III, or IV, or any compound explicitly disclosed herein.
As used herein, farnesoid X receptor or FXR refers to all mammalian forms of such receptor including, for example, alternative splice isoforms and naturally occurring isoforms (see, e.g., Huber et al., Gene 290:35-43 (2002)). Representative FXR species include, without limitation rat FXR (Gen Bank Accession No. NM 021745), mouse FXR (Genbank Accession No. NM 009108), and human FXR (GenBank Accession No. NM 005123).
As used herein Compound A is
Figure imgf000016_0001
, which is also known as obeticholic acid, INT-747,
6ECDCA, 6-alpha-ethyl chenodeoxycholic acid, or 6a-ethyl-3 ,7a-dihydroxy-5P-cholan-24- oic acid.
As used herein, Com ound B is
Figure imgf000016_0002
, which is also known as INT-767 or 6a-ethyl-3a,7a,23- trihydroxy-24-nor-5P-cholan-23 -sulfate sodium salt.
As used herein, Compound C is
Figure imgf000017_0001
, which is also known as INT-777 or 6a-ethyl-23(S)-methyl- 3a,7a,12a trihydroxy-5P-cholan-24-oic acid.
As used herein, Compound D is
Figure imgf000017_0002
, which is also known as 6a-ethyl-23(R)-methyl chenodeoxycholic acid, and S-EMCDCA.
As used herein, Compound E is
Figure imgf000017_0003
As used herein, cholic acid is
Figure imgf000017_0004
, which is also known
As used herein, chenodeoxycholic acid is
Figure imgf000017_0005
is also known as CDCA. As used herein, ursodeoxycholic acid is
Figure imgf000018_0001
which is also known as UDCA.
As used herein taurochenodeoxycholic acid is
Figure imgf000018_0002
, which is also known asn TCDCA.
As used herein, tauroursodeoxycholic acid is
Figure imgf000018_0003
which is also known as TUDCA.
As used herein, lithocholic acid is
Figure imgf000018_0004
which is also known as LCA.
Methods of the Invention
Compounds of the invention are useful in therapy in subjects such as mammals, including humans. In particular, compounds of the invention are useful in a method of treating or preventing a disease or condition in a subject comprising administering to the subject in need thereof an effective amount of a compound of the invention or a
pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the disease or condition is FXR-mediated (e.g. , FXR plays a role in the initiation or progress of the disease or condition). In one aspect, the disease or condition is mediated by decreased FXR activity. In one aspect, the disease or condition is selected from cardiovascular disease, chronic liver disease, lipid disorder, gastrointestinal disease, renal disease, metabolic disease, cancer, and neurological disease.
In one aspect, the invention relates to a method of treating or preventing
cardiovascular disease in a subject, comprising administereing to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating cardiovascular disease. In one aspect, the invention relates to a method of preventing cardiovascular disease. In one aspect, cardiovascular disease selected from atherosclerosis, arteriosclerosis, dyslipidemia, hypercholesteremia, hyperlipidemia, hyperlipoproteinemia, and hypertriglyceridemia.
The term "hyperlipidemia" refers to the presence of an abnormally elevated level of lipids in the blood. Hyperlipidemia can appear in at least three forms: (1)
hypercholesterolemia, i.e., an elevated cholesterol level; (2) hypertriglyceridemia, i.e., an elevated triglyceride level; and (3) combined hyperlipidemia, i.e., a combination of hypercholesterolemia and hypertriglyceridemia.
The term "dyslipidemia" refers to abnormal levels of lipoproteins in blood plasma including both depressed and/or elevated levels of lipoproteins (e.g., elevated levels of LDL, VLDL and depressed levels of HDL).
In one aspect, the invention relates to a method selected from reducing cholesterol levels or modulating cholesterol metabolism, catabolism, absorption of dietary cholesterol, and reverse cholesterol transport in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the invention relates to a method of treating or preventing a disease affecting cholesterol, triglyceride, or bile acid levels in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the invention relates to a method of lowering triglycerides in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the invention relates to a method of treating or preventing a disease state associated with an elevated cholesterol level in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating a disease state associated with an elevated cholesterol level in a subject. In one aspect, the invention relates to a method of preventing a disease state associated with an elevated cholesterol level in a subject. In one aspect, the disease state is selected from coronary artery disease, angina pectoris, carotid artery disease, strokes, cerebral arteriosclerosis, and xanthoma.
In one aspect, the invention relates to a method of treating or preventing a lipid disorder in a subject, comprising administereing to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating a lipid disorder. In one aspect, the invention relates to a method of preventing a lipid disorder.
Lipid disorders are the term for abnormalities of cholesterol and triglycerides. Lipid abnormalities are associated with an increased risk for vascular disease, and especially heart attacks and strokes. Abnormalities in lipid disorders are a combination of genetic
predisposition as well as the nature of dietary intake. Many lipid disorders are associated with being overweight. Lipid disorders may also be associated with other diseases including diabetes, the metabolic syndrome (sometimes called the insulin resistance syndrome), underactive thyroid or the result of certain medications (such as those used for anti-rejection regimens in people who have had transplants).
In one aspect, the invention relates to a method of treating or preventing one or more symptoms of disease affecting lipid metabolism (i.e., lipodystrophy) in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating one or more symptoms of a disease affecting lipid metabolism. In one aspect, the invention relates to a method of preventing one or more symptoms of a disease affecting lipid metabolism.
In one aspect, the invention relates to a method of decreasing lipid accumulation in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
In one aspect, the invention relates to a method of treating or preventing chronic liver disease in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating chronic liver disease. In one aspect, the invention relates to a method of preventing chronic liver disease. In one aspect, the chronic liver disease is selected from primary biliary cirrhosis (PBC), cerebrotendinous xanthomatosis (CTX), primary sclerosing cholangitis (PSC), drug induced cholestasis, intrahepatic cholestasis of pregnancy, parenteral nutrition associated cholestasis (PNAC), bacterial overgrowth or sepsis associated cholestasis, autoimmune hepatitis, chronic viral hepatitis, alcoholic liver disease, nonalcoholic fatty liver disease (NAFLD), nonalcoholic steatohepatitis (NASH), liver transplant associated graft versus host disease, living donor transplant liver regeneration, congenital hepatic fibrosis, choledocholithiasis, granulomatous liver disease, intra- or extrahepatic malignancy, Sjogren's syndrome, Sarcoidosis, Wilson's disease, Gaucher' s disease, hemochromatosis, and alpha 1- antitrypsin deficiency.
In one aspect, the invention relates to a method of treating or preventing one or more symptoms of cholestasis, including complications of cholestasis in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating one or more symptoms of cholestasis. In one aspect, the invention relates to preventing one or more symptoms of cholestasis.
Cholestasis is typically caused by factors within the liver (intrahepatic) or outside the liver (extrahepatic) and leads to the accumulation of bile salts, bile pigment bilirubin, and lipids in the blood stream instead of being eliminated normally. Intrahepatic cholestasis is characterized by widespread blockage of small ducts or by disorders, such as hepatitis, that impair the body's ability to eliminate bile. Intrahepatic cholestasis may also be caused by alcoholic liver disease, primary biliary cirrhosis, cancer that has spread (metastasized) from another part of the body, primary sclerosing cholangitis, gallstones, biliary colic and acute cholecystitis. It can also occur as a complication of surgery, serious injury, cystic fibrosis, infection, or intravenous feeding or be drug induced. Cholestasis may also occur as a complication of pregnancy and often develops during the second and third trimesters.
Extrahepatic cholestasis is most often caused by choledocholithiasis (Bile Duct Stones), benign biliary strictures (non-cancerous narrowing of the common duct),
cholangiocarcinoma (ductal carcinoma) and pancreatic carcinoma. Extrahepatic cholestasis can occur as a side effect of many medications.
A compound of the invention may be used for treating or preventing one or more symptoms of intrahepatic or extrahepatic cholestasis, including without limitation, biliary artesia, obstetric cholestasis, neonatal cholestasis, drug induced cholestasis, cholestasis arising from Hepatitis C infection, chronic cholestatic liver disease such as primary biliary cirrhosis (PBC), and primary sclerosing cholangitis (PSC).
In one aspect, the invention relates to a method of enhancing liver regeneration in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the method is enhancing liver regeneration for liver transplantation.
In one aspect, the invention relates to a method of treating or preventing fibrosis in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating fibrosis. In one aspect, the invention relates to a method of preventing fibrosis.
Accordingly, as used herein, the term fibrosis refers to all recognized fibrotic disorders, including fibrosis due to pathological conditions or diseases, fibrosis due to physical trauma ("traumatic fibrosis"), fibrosis due to radiation damage, and fibrosis due to exposure to chemotherapeutics. As used herein, the term "organ fibrosis" includes but is not limited to liver fibrosis, fibrosis of the kidneys, fibrosis of lung, and fibrosis of the intestine. "Traumatic fibrosis" includes but is not limited to fibrosis secondary to surgery (surgical scarring), accidental physical trauma, burns, and hypertrophic scarring.
As used herein, "liver fibrosis" includes liver fibrosis due to any cause, including but not limited to virally-induced liver fibrosis such as that due to hepatitis B or C virus;
exposure to alcohol (alcoholic liver disease), certain pharmaceutical compounds including but not limited to methotrexate, some chemotherapeutic agents, and chronic ingestion of arsenicals or vitamin A in megadoses, oxidative stress, cancer radiation therapy or certain industrial chemicals including but not limited to carbon tetrachloride and
dimethylnitrosamine; and diseases such as primary biliary cirrhosis, primary sclerosing colangitis, fatty liver, obesity, non-alcoholic steatohepatitis, cystic fibrosis, hemochromatosis, auto-immune hepatitis, and steatohepatitis. Current therapy in liver fibrosis is primarily directed at removing the causal agent, e.g. , removing excess iron (e.g. , in the case of hemochromatosis), decreasing viral load (e.g., in the case of chronic viral hepatitis), or eliminating or decreasing exposure to toxins (e.g. , in the case of alcoholic liver disease). Anti-inflammatory drugs such as corticosteroids and colchicine are also known for use in treating inflammation that can lead to liver fibrosis. As is known in the art, liver fibrosis may be clinically classified into five stages of severity (SO, SI, S2, S3, and S4), usually based on histological examination of a biopsy specimen. SO indicates no fibrosis, whereas S4 indicates cirrhosis. While various criteria for staging the severity of liver fibrosis exist, in general early stages of fibrosis are identified by discrete, localized areas of scarring in one portal (zone) of the liver, whereas later stages of fibrosis are identified by bridging fibrosis (scarring that crosses zones of the liver).
In one aspect, the invention relates to a method of treating or preventing organ fibrosis in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the fibrosis is liver fibrosis.
In one aspect, the invention relates to a method of treating or preventing
gastrointestinal disease in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating gastrointestinal disease. In one aspect, the invention relates to a method of preventing gastrointestinal disease. In one aspect, the gastrointestinal disease is selected from inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), bacterial overgrowth, malabsorption, post-radiation colitis, and microscopic colitis. In one aspect, the
inflammatory bowel disease is selected from Crohn's disease and ulcerative colitis.
In one aspect, the invention relates to a method of treating or preventing renal disease in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating renal disease. In one aspect, the invention relates to a method of preventing renal disease. In one aspect, the renal disease is selected from diabetic nephropathy, focal segmental glomerulosclerosis (FSGS), hypertensive nephrosclerosis, chronic glomerulonephritis, chronic transplant glomerulopathy, chronic interstitial nephritis, and polycystic kidney disease.
In one aspect, the invention relates to a method of treating or preventing metabolic disease in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating renal disease. In one aspect, the invention relates to a method of preventing renal disease. In one aspect, the metabolic disease is selected from insulin resistance, hyperglycemia, diabetes mellitus, diabesity, and obesity. In one aspect, the diabetes mellitus is type I diabetes. In one aspect, the diabetes mellitus is type II diabetes.
Diabetes mellitus, commonly called diabetes, refers to a disease or condition that is generally characterized by metabolic defects in production and utilization of glucose which result in the failure to maintain appropriate blood sugar levels in the body.
In the case of type II diabetes, the disease is characterized by insulin resistance, in which insulin loses its ability to exert its biological effects across a broad range of concentrations. This resistance to insulin responsiveness results in insufficient insulin activation of glucose uptake, oxidation and storage in muscle and inadequate insulin repression of lipolysis in adipose tissue and of glucose production and secretion in liver. The resulting condition is elevated blood glucose, which is called "hyperglycemia". Uncontrolled hyperglycemia is associated with increased and premature mortality due to an increased risk for microvascular and macrovascular diseases, including retinopathy (the impairment or loss of vision due to blood vessel damage in the eyes); neuropathy (nerve damage and foot problems due to blood vessel damage to the nervous system); and nephropathy (kidney disease due to blood vessel damage in the kidneys), hypertension, cerebrovascular disease and coronary heart disease. Therefore, control of glucose homeostasis is a critically important approach for the treatment of diabetes.
Insulin resistance has been hypothesized to unify the clustering of hypertension, glucose intolerance, hyperinsulinemia, increased levels of triglyceride and decreased HDL cholesterol, and central and overall obesity. The association of insulin resistance with glucose intolerance, an increase in plasma triglyceride and a decrease in high-density lipoprotein cholesterol concentrations, hypertension, hyperuricemia, smaller denser low- density lipoprotein particles, and higher circulating levels of plasminogen activator inhibitor- 1, has been referred to as "Syndrome X". Accordingly, methods of treating or preventing any disorders related to insulin resistance including the cluster of disease states, conditions or disorders that make up "Syndrome X" are provided. In one aspect, the invention relates to a method of treating or preventing metabolic syndrome in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating metabolic syndrome. In one aspect, the invention relates to a method of preventing metabolic syndrome.
In one aspect, the invention relates to a method of treating or preventing cancer in a subject, comprising administereing to the sufject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating cancer. In one aspect, the invention relates to a method of preventing cancer. In one aspect, the cancer is colorectal cancer.
In one aspect, the invention relates to a method of treating or preventing gallstones in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating gallstones. In one aspect, the invention relates to a method of preventing gallstones.
A gallstone is a crystalline concretion formed within the gallbladder by accretion of bile components. These calculi are formed in the gallbladder but may distally pass into other parts of the biliary tract such as the cystic duct, common bile duct, pancreatic duct, or the ampulla of Vater. Rarely, in cases of severe inflammation, gallstones may erode through the gallbladder into adherent bowel potentially causing an obstruction termed gallstone ileus. Presence of gallstones in the gallbladder may lead to acute cholecystitis, an inflammatory condition characterized by retention of bile in the gallbladder and often secondary infection by intestinal microorganisms, predominantly Escherichia coli and Bacteroides species.
Presence of gallstones in other parts of the biliary tract can cause obstruction of the bile ducts, which can lead to serious conditions such as ascending cholangitis or pancreatitis.
In one aspect, the invention relates to a method of treating or preventing cholesterol gallstone disease in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating cholesterol gallstone disease. In one aspect, the invention relates to a method of preventing cholesterol gallstone disease.
In one aspect, the invention relates to a method of treating or preventing neurological disease in a subject, comprising administering to the subject in need thereof an effective amount of a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to a method of treating neurological disease. In one aspect, the invention relates to a method of preventing neurological disease. In one aspect, the neurological disease is stroke.
In one aspect, the invention relates to a method as decribed herein and further wherein, the compound is administered by a route selected from oral, parenteral, intramuscular, intranasal, sublingual, intratracheal, inhalation, ocular, vaginal, rectal, and intracerebroventricular. In one aspect, the route is oral.
In one aspect, the compound utiltized in one or more of the methods described herein is an FXR agonist. In one aspect, the compound is a selective FXR agonist. In one aspect, the compound does not activate TGR5. In one aspect, the compound does not activate other nuclear receptors involved in metabolic pathways (e.g. , as measured by an AlphaScreen assay). In one aspect, such other nuclear receptors involved in metabolic pathways are selected from LXRp, PXR, CAR, PPARa, PPAR5, RARa, VDR, TR, PR, RXR, GR, and ER. In one aspect, the compound induces apoptosis.
In one aspect, the invention relates to a method of regulating the expression level of one or more genes involved in bile acid homeostasis.
In one aspect, the invention relates to a method of down regulating the expression level of one or more genes selected from CYP7al and SREBP-IC in a cell by administering to the cell a compound of the invention. In one aspect, the invention relates to a method of up regulating the expression level of one or more genes selected from OSTa, OSTp, BSEP, SHP, UGT2B4, MRP2, FGF-19, PPARy, PLTP, APOCII, and PEPCK in a cell by
administering to the cell a compound of the invention.
The invention also relates to the manufacture of a medicament for treating or preventing a disease or condition (e.g., a disease or condition mediated by FXR), wherein the medicament comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates to the manufacture of a medicament for treating or preventing any one of the diseases or conditions described herein above, wherein the medicament comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
The invention also relates to a composition for use in a method for treating or preventing a disease or condition (e.g., a disease or condition mediated by FXR), wherein the composition comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. In one aspect, the invention relates toa composition for use in a method for treating or preventing any one of the diseases or conditions described herein above, wherein the composition comprises a compound of the invention or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. Formulations
The methods of the invention comprise the step of administering an effective amount of a compound of the invention. As used herein, the term an "effective amount" refers to an amount of a compound of the invention which is sufficient to achieve the stated effect.
Accordingly, an effective amount of a compound of the invention used in a method for the prevention or treatment of FXR mediated diseases or conditions will be an amount sufficient to prevent or treat the FXR mediated disease or condition.
Similarly, an effective amount of a compound of the invention for use in a method for the prevention or treatment of a cholestatic liver disease or increasing bile flow will be an amount sufficient to increase bile flow to the intestine.
The amount of the compound of the invention which is required to achieve the desired biological effect will depend on a number of factors such as the use for which it is intended, the means of administration, and the recipient, and will be ultimately at the discretion of the attendant physician or veterinarian. In general, a typical daily dose for the treatment of a FXR mediated disease and condition, for instance, may be expected to lie in the range of from about 0.01 mg/kg to about 100 mg/kg. This dose may be administered as a single unit dose or as several separate unit doses or as a continuous infusion. Similar dosages would be applicable for the treatment of other diseases, conditions and therapies including the prevention and treatment of cholestatic liver diseases.
Thus, in a further aspect, the present invention provides a pharmaceutical composition comprising, as active ingredient, a compound of the invention together, and/or in admixture, with at least one pharmaceutical carrier or diluent. These pharmaceutical compositions may be used in the prevention or treatment of the foregoing diseases or conditions.
The carrier must be pharmaceutically acceptable and must be compatible with, i.e. not have a deleterious effect upon, the other ingredients in the composition. The carrier may be a solid or liquid and is preferably formulated as a unit dose formulation, for example, a tablet which may contain from 0.05 to 95% by weight of the active ingredient. If desired, other physiologically active ingredients may also be incorporated in the pharmaceutical compositions of the invention.
Possible formulations include those suitable for oral, sublingual, buccal, parenteral
(for example subcutaneous, intramuscular, or intravenous), rectal, topical including transdermal, intranasal and inhalation administration. Most suitable means of administration for a particular patient will depend on the nature and severity of the disease or condition being treated or the nature of the therapy being used and on the nature of the active compound, but where possible, oral administration is preferred for the prevention and treatment of FXR mediated diseases and conditions. Formulations suitable for oral administration may be provided as discrete units, such as tablets, capsules, cachets, lozenges, each containing a predetermined amount of the active compound; as powders or granules; as solutions or suspensions in aqueous or non-aqueous liquids; or as oil-in- water or water-in-oil emulsions.
Formulations suitable for sublingual or buccal administration include lozenges comprising the active compound and, typically a flavoured base, such as sugar and acacia or tragacanth and pastilles comprising the active compound in an inert base, such as gelatine and glycerine or sucrose acacia.
Formulations suitable for parenteral administration typically comprise sterile aqueous solutions containing a predetermined concentration of the active compound; the solution is preferably isotonic with the blood of the intended recipient.
Additional formulations suitable for parenteral administration include formulations containing physiologically suitable co-solvents and/or complexing agents such as surfactants and cyclodextrins. Oil-in-water emulsions are also suitable formulations for parenteral formulations. Although such solutions are preferably administered intravenously, they may also be administered by subcutaneous or intramuscular injection.
Formulations suitable for rectal administration are preferably provided as unit-dose suppositories comprising the active ingredient in one or more solid carriers forming the suppository base, for example, cocoa butter.
Formulations suitable for topical or intranasal application include ointments, creams, lotions, pastes, gels, sprays, aerosols and oils. Suitable carriers for such formulations include petroleum jelly, lanolin, polyethyleneglycols, alcohols, and combinations thereof.
Formulations of the invention may be prepared by any suitable method, typically by uniformly and intimately admixing the active compound with liquids or finely divided solid carriers or both, in the required proportions and then, if necessary, shaping the resulting mixture into the desired shape.
For example a tablet may be prepared by compressing an intimate mixture comprising a powder or granules of the active ingredient and one or more optional ingredients, such as a binder, lubricant, inert diluent, or surface active dispersing agent, or by moulding an intimate mixture of powdered active ingredient and inert liquid diluent. Suitable formulations for administration by inhalation include fine particle dusts or mists which may be generated by means of various types of metered dose pressurised aerosols, nebulisers, or insufflators.
For pulmonary administration via the mouth, the particle size of the powder or droplets is typically in the range 0.5-10 μιη, preferably 1-5 um, to ensure delivery into the bronchial tree. For nasal administration, a particle size in the range 10-500 μιη is preferred to ensure retention in the nasal cavity.
Metered dose inhalers are pressurised aerosol dispensers, typically containing a suspension or solution formulation of the active ingredient in a liquefied propellant. During use, these devices discharge the formulation through a valve adapted to deliver a metered volume, typically from 10 to 150 μΐ, to produce a fine particle spray containing the active ingredient. Suitable propellants include certain chlorofluorocarbon compounds, for example, dichlorodifluoromethane, trichlorofluoromethane, dichlorotetrafluoroethane and mixtures thereof. The formulation may additionally contain one or more co-solvents, for example, ethanol surfactants, such as oleic acid or sorbitan trioleate, anti-oxidants and suitable flavouring agents.
Nebulisers are commercially available devices that transform solutions or suspensions of the active ingredient into a therapeutic aerosol mist either by means of acceleration of a compressed gas typically air or oxygen, through a narrow venturi orifice, or by means of ultrasonic agitation. Suitable formulations for use in nebulisers consist of the active ingredient in a liquid carrier and comprise up to 40% w/w of the formulation, preferably less than 20%) w/w. The carrier is typically water or a dilute aqueous alcoholic solution, preferably made isotonic with body fluids by the addition of, for example, sodium chloride. Optional additives include preservatives if the formulation is not prepared sterile, for example, methyl hydroxy-benzoate, anti-oxidants, flavouring agents, volatile oils, buffering agents and surfactants.
Suitable formulations for administration by insufflation include finely comminuted powders which may be delivered by means of an insufflator or taken into the nasal cavity in the manner of a snuff. In the insufflator, the powder is contained in capsules or cartridges, typically made of gelatin or plastic, which are either pierced or opened in situ and the powder delivered by air drawn through the device upon inhalation or by means of a manually- operated pump. The powder employed in the insufflator consists either solely of the active ingredient or of a powder blend comprising the active ingredient, a suitable powder diluent, such as lactose, and an optional surfactant. The active ingredient typically comprises from 0.1 to 100 w/w of the formulation.
In addition to the ingredients specifically mentioned above, the formulations of the present invention may include other agents known to those skilled in the art of pharmacy, having regard for the type of formulation in issue. For example, formulations suitable for oral administration may include flavouring agents and formulations suitable for intranasal administration may include perfumes.
The following Examples are illustrative and should not be interpreted in any way so as to limit the scope of the invention.
EXAMPLES
In general, the potential of a compound of the invention as a drug candidate can be tested using various assays known in the art. For example, for in vitro validation for FXR: its activity and selectivity can be evaluated using AlphaScreen (biochemical assay); gene expression can be evaluated using RT-PCR (FXR target gene); and cytotoxicity (e.g., HepG2) can be evaluated using ATP content, LDH release, and Caspase-3 activation. For the in vitro validation for TGR5 : its activity and selectivity can be evaluated using HTR-FRET (cell-based assay); gene expression can be evaluated using RT-PCR (TGR5 target gene (i.e., cFOS)); and cytotoxicity (e.g., HepG2) can be evaluated using ATP content, LDH release, and Caspase-3 activation. The ADME (absorption, distribution, metabolism, and excretion) /pharmacokinetic properties and in vivo validation of compounds of the invention can also be studied using methods known in the art.
Example 1 : Synthesis of compounds 100 and 101
Compounds 100 and 101 were synthesized according to the scheme below.
Scheme 1
Figure imgf000031_0001
compound 101
Reagents and conditions: a) 1) MeOH, p-TSA, ultrasound, 3 h, quantitative; 2) Ac20, NaHC03, THF, reflux 12 h, 85%; b) PCC, CH2C12, 6 h, 62%; c) Ac20, Bi(OTf)3, CH2C12, 1 h, 91%; d) Br2, Benzene, 30 °C overnight, 74%; e) NaBH4, NaOAc, Pyr, r.t. 2 days, 80%; f) HI 57%, AcOH, r.t. 30 min; g) Cr03, AcOH, r.t. 45 min; h) Zn dust, NaOAc, reflux 20 min; i) NaOH 2M, MeOH, r.t. overnight, 65% from compound 5; 1) NaBH4, THF/H20 4: 1, 70%; m) Na(s), sec-BuOH, 50 °C, 70%.
The synthesis is based on the use of 6a-ethyl-cholic acid (6-ECA, 1) as starting material which was prepared using methods known in the art. 6-ECA (1) was treated with p- TSA in MeOH under ultrasound irradiation to give the corresponding methyl ester, which was selectively protected at the C3 position by refluxing with Ac20 in the present of NaHC03 in THF to afford compound 2. Treating compound 2 with PCC in CH2C12 at room temperature followed by treatment with Ac20, Bi(OTf)3 in CH2C12 at room temperature afforded the intermediate methyl 3 ,7a-diacetoxy-12-oxo-5P-cholan-24-oate (compound 3; about 48%o from compound 2). Treatment of compound 3 with Br2 in benzene for e.g., 12 h yielded compound 4. Reaction of compound 4 with NaBH4 and NaOAc in freshly distilled pyridine gave the corresponding 11β-12β epoxide (compound 5), in about 59% yield after silica gel purification. The reaction of compound 5 with HI in AcOH at room temperature afforded the halohydrine intermediate which were then oxidized at CI 1 position with Cr03 in AcOH to generate compound 6. Reaction of compound 6 with Zn dust in boiling AcOH and alkali hydrolysis (NaOH/MeOH) afforded 3a,7a-hydroxy-12-keto-513-cholan-24-oic acid
(compound 7; about 65% yield from compound 5).
Compound 7 was stereoselective^ reduced at the CI 1-carbonyl using NaBH4 in a mixture of THF/H20= (4: 1, v/v) to give 3 ,7α, 11 P-trihydroxy-6a-ethyl-5 P-cholan-24-oic acid (Compound 100; about 27% from compound 3), after chromatographic purification to afford Compound 100. Alternatively, compound 7 was reduced with sodium in sec- uOH at 50 °C to give Compound 101 (about 70%> yield), after purification. Example 2: Compound 100 is a potent, specific FXR agonist
In the nucleus, ligand-bound nuclear receptors (NRs) modulate initiation of transcription by directly interacting with the basal transcriptional machinery or by contacting bridging factors called coactivators (Onate SA, et al, Science 1995; 270: 1354-1357; Wang JC, et al, J Biol Chem 1998; 273:30847-30850; Zhu Y, et al, Gene Expr 1996; 6: 185-195). The ligand-dependent interaction of NRs with their coactivators occurs between activation function 2 (AF-2), located in the receptor ligand-binding domain (LBD) and the nuclear receptor boxes (NR box) located on the coactivators (Nolte RT, et al, Nature 1998; 395: 137- 143). Several lines of evidence have demonstrated that the LXXLL peptide sequence present in the NR box represents a signature motif that facilitates the interaction of different proteins with the AF-2 region (Heery DM, et al, Nature 1997; 387:733-736; Torchia J, et al, Nature 1997; 387:677-684).
AlphaScreen was used with the aim of identify novel modulators by taking advantage of the bimolecular interaction prevailing between FXR and the LXXLL motif present in the NR box of the steroid receptor coactivator 1 (SRC-1).
Human FXR-LBD-GST was incubated with increasing concentrations of the indicated ligands in the presence of biotinylated LXXLL SRC-1 peptide. The AlphaScreen signal increases when the complex receptor-coactivator is formed. EC50 values were 8.9 μΜ for chenodeoxycholic acid (CDCA; which is a positive control), 0.16 μΜ for Compound A, and 0.16 μΜ for Compound 100. These results are the mean ± S.D. of triplicate samples from a representative experiment of three performed. The AlphaScreen assay is a very robust and reproducible assay, as shown by the Z' factor of 0.84 (Zhang JH, et al., J Biomol Screen 1999; 4:67-73). Thus, Compound 100 is a highly potent FXR agonist.
Further, the data in the table below show that Compound 100 is selective for human FXR and is not active for human TGR5.
Table 1
Figure imgf000033_0001
Additionally, using the AlphaScreen assay, it was demonstrated that Compound 100 specifically activates FXR and does not activate 13 other nuclear receptors involved in the metabolic pathways.
Table 2
Figure imgf000034_0001
* : inverse agonist.
Values for compound B taken from Rizzo G., et al, Mol. Pharm., 2010; 78: 617-630.
FXR activation by Compound 100 was also tested in cell-based transactivation assays with the use of HEK293T cell line transiently transfected with Gal4-FXR-LBD chimera and the (UAS)5-Luc system (Figure 1). FXR activation by Compound 100 was comparable to that induced by compound A indicating that these compounds are potent FXR agonists in cell-based assays. Figure 1 is a graph showing the activity of Compound 100 in comparison to compound A in a transactivation assay in HEK293T cells. NT is FXR vector-transfected cells without exposure to compound A or Compound 100. Values are represented in μΜ.
Bile acids (BAs) modulate not only several nuclear hormone receptors, but are also agonists for the G protein-coupled receptor (GPCR) TGR5 ( Makishima M, et al, Science 1999; 284: 1362-1365; Parks DJ, et al, Science 1999; 284: 1365-1368; Maruyama T, et al, Biochem Biophys Res Commun 2002; 298:714-719; Kawamata Y, et al, J Biol Chem 2003; 278:9435-9440). Signalling via FXR and TGR5 modulates several metabolic pathways, regulating not only BA synthesis and enterohepatic recirculation, but also triglyceride, cholesterol, glucose, and energy homeostasis. To evaluate the capacity of a compound of the invention to activate TGR5, Compound 100 and other comparison compounds were screened for an increase of intracellular cAMP as a read-out for TGR5 activation. Human enteroendocrine NCI-H716 cells constitutively expressing TGR5 were exposed to increasing concentrations of Compound 100, and intracellular cAMP levels were measured by TR- FRET. Lithocholic acid (LCA) was used as positive control.
As shown in Figure 2A, Compound 100 does not induce TGR5 activity in cells expressing the receptor physiologically as no change in the level of intracellular cAMP was observed. To further assess if Compound 100 could bind TGR5, a clonal cell line over- expressing TGR5 was exposed to different concentrations of Compound 100. The results illustrated in Figure 2B show that even with the over-expression of the TGR5 receptor, Compound 100 had no relevant effect. Figure 2A is a graph showing the TGR5 activity of Compound 100 (no activity) and LCA in human enteroendocrine cells expressing TGR5 at physiological level. Results are shown as the mean ± S. D. of triplicate samples from a representative experiment of three performed. Figure 2B is a graph showing the TGR5 activity of Compound 100 (no activity) and LCA in human Chinese hamster ovary (CHO) cells over-expressing TGR5.
Example 3: FXR target genes modulated by Compound 100
To evaluate the capacity of Compound 100 to modulate FXR target genes, quantitative RT-PCR assays were performed. HepG2 cells were selected as a relevant cell line to determine whether a compound of the invention can regulate the endogenous FXR genetic network. The ability of a compound of the invention to induce FXR target genes was assessed by isolating total RNA from cells treated overnight with ΙμΜ of compounds A, B, and 100. Compound A is established as a potent FXR selective agonist and compound B is established as a dual potent FXR/TGR5 agonist. Compound 100's gene activation profile in HepG2 cells was compared to the profiles of compounds A and B. (Pellicciari, R, et al., J Med Chem. 2002; Aug 15; 45: 3569-72; Rizzo, G, et al., Mol. Pharm., 2010; 78: 617-630).
FXR regulates the expression of several target genes involved in BA homeostasis. Briefly, FXR plays a central role in several metabolic pathways, including i.e., lipid metabolism, bile-acids metabolism, and carbohydrate metabolism. Regarding gene expression profiling, the genes encoding proteins involved in lipid metabolism include, e.g., APOCII, APOE, APOAI, SREBP-1C, VLDL-R, PLTP, and LPL; the genes encoding proteins involved in bile-acids metabolism include, e.g., OSTa/β, BSEP, MRP2, SHP, CYP7A1, FGF19, SULT2A1, and UGT2B4; and the genes encoding proteins involved in carbohydrate metabolism include, e.g., PGCla, PEPCK, and GLUT2. As shown in Figures 3A-3H, Compound 100 activation of FXR indirectly represses the expression of the BA biosynthetic enzymes CYP7A1 by increasing the levels of the nuclear receptor SHP in the liver and intestine and increasing the level of FGF19 (Goodwin, B, et al, Mol. Cell 2000; 6: 517-526). Compound 100 activated FXR also positively regulates the expression of genes encoding proteins involved in the transport of BA, including, BSEP, and OSTa and OSTp. Newly synthesized BAs are conjugated with taurine or glycine and then actively secreted in the gall bladder, FXR regulates both of these critical processes. Monoanionic- and dianionic-conjugated BAs are then actively secreted in the gall bladder by BSEP and the multidrug related protein 2 (MRP2), respectively. These transporters belonging to the ABC transporter family and are both induced by FXR at the transcriptional level. The regulation of these ABC transporters is of critical importance in order to avoid BA accumulation in the liver and consequent hepatic injury (Schinkel AH, et al., Mammalian drug efflux transporters of the ATP binding cassette (ABC) family: an overview. Adv Drug Deliv Rev. 2012; Sep 13).
Figure 3 are a series of graphs showing the activity of Compound 100 and other comparison compounds in regulating expression of OSTa (A), OSTP (B), BSEP (C), MRP2 (D), CYP7A1 (E), SHP (F), FGF-19 (G), and UGT2B4 (H). Note in the Figures 3A-3H, the y-axis displays folds change in expression relative to untreated cells. The data were normalized relative to B2M. The error bars display the standard error of the three replicates.
FXR activation contributes to reverse cholesterol transport, a process that results in the delivery of cholesterol from peripheral tissues to the liver for biliary disposal and consequent fecal elimination (Lambert, G, et al., J Biol Chem 2003; 278, 2563-70). In this metabolic scenario, FXR regulates the expression of phospholipids transfer protein (PLTP), responsible for the transfer of phospholipids and cholesterol from LDL to HDL, hepatic lipoproteins, such as ApoE, ApoC-I, ApoC-IV, and scavenger receptor Bl(SRBl), which is involved in the hepatic uptake of HDL.
FXR controls triglyceride (TG) metabolism by regulating hepatic de novo lipogenesis and triglyceride clearance. Upon activation by Compound 100, FXR down regulates the expression of SREBP-lc, a transcription factor that plays a critical role in stimulating fatty acid synthesis and lipogenesis (Figures 4A-4D) (Landrier, JF, et al., J Clin Invest 2004; 113, 1408-18). In addition to the reduction of de novo lipogenesis, FXR activation also modulates TG clearance. This additional TG-lowering effect of FXR is explained at the molecular level by the induction of key genes, such as Apo-C-Il LPL and VDL receptor (Kast, HR, et al., Mol Endocrinol 2001; 15, 1720-8). Figure 4 are a series of graphs showing the activity of Compound 100 and other comparison compounds in regulating PLTP involved in lipid metabolism (A), SREBP-1C (B), APOCII (C), and PPARy (D). Note in the Figures 4A-4D, the y-axis displays folds change in expression relative to not treated cells. The data were normalized relative to B2M. The error bars display the standard error of the three replicates.
FXR may also have a role in carbohydrate metabolism. (Ma K, et al., J Clin Invest. 2006; 116: 1102-9). PEPCK gene regulation was studied (Figure 5) using Compound 100. Figure 5 is a graph showing the regulation of Compound 100 and other comparison compounds on PEPCK gene. The y-axis displays folds change in expression relative to not treated cells. The data were normalized relative to B2M. The error bars display the standard error of the three replicates.
Collectively the gene expression studies showed that Compound 100 modulates the same FXR target genes as compound A or B (also see Table 3).
Table 3
Figure imgf000037_0001
Example 4: Compound 100 does not exert cytotoxic effects in HepG2 cells.
To evaluate in vitro cytotoxicity of Compound 100, two different assay methods were employed. The assays evaluated cell viability by measuring ATP levels and cytotoxicity by measuring LDH release. Adenosine Triphosphate (ATP) nucleotide represents the source of energy at the basic molecular level, as it is a multifunctional molecule that is used in every cell as a coenzyme and is an integral part of the mitochondrial DNA (Kangas L, et al., Medical Biology, 1984; 62, 338-343; Crouch SPM, et al, J. Immunol. Methods, 1993; 160, 81 - 88; Petty RD, et al., J. Biolumin. Chemilumin. 1995; 10, 29 - 34). It has been called the "molecular unit of currency" when it comes to intracellular energy transfer. This is to ensure the important role of ATP in metabolism and a drop in ATP content is the first step in revealing cellular damage (Storer RD, et al., Mutation Research, 1996; 368, 59 - 101; Cree IA, Andreotti PE., Toxicology in Vitro, 1997; 11, 553 - 556).
Cell viability was determined as measure of intracellular ATP related to the time of exposure and concentration of the test compounds (Sussman, NL.; Promega Cell Notes, Issue 3. 2002).
Figure 6 is a graph showing the measurement of ATP in HepG2 cells, treated with the indicated concentrations of compounds for 4 h. It demonstrated that all cells in presence of different concentrations of Compound 100 were viable as cells treated with the vehicle alone, i.e., all cells treated with Compound 100 remain viable (100%). LCA, a well-known cytotoxic bile acid, was used as comparator and Tamoxifen was used as positive controls for the assays.
An additional method to determine the viability of cells is to detect the integrity of the membrane that defines the cellular compartmentalization. Measuring the leakage of components out of the cytoplasm, in damaged cell membranes, indicates loss of membrane integrity, and LDH release is the method used to determine common toxicity in cells. HepG2 cells were treated with Compound 100, serial dilutions were performed, LCA dilutions were added to the plated cells as assay control together with no-cell and untreated cells. The assay was performed in triplicate for each test compound concentration.
The results show that Compound 100 does not induce any cytotoxic effect on HepG2 cells. Lithocolic Acid increased LDH release at 70 μΜ whilst the control Tamoxifen exerted the cytotoxic effects at approximately 25 μΜ (see Table 4).
Table 4
Figure imgf000038_0001
* Rizzo et al, Mol. Pharm. 2010
Example 5: Compound 100 does not inhibit cytochrome P450 enzymes. To evaluate the potential of Compound 100 for drug-drug interactions, the six main CYP450 isoforms (CYP1A2, CYP2C9, CYP2C19, CYP2D6, CYP2E1 , CYP3A4) were investigated. (Obach, RS, et al., J Pharmcol Exp Ther, 2006; 316(1): p. 336-48).
To determine interaction between Compound 100 and cytochrome P450 enzymes, Compound 100 was analyzed by its capacity to inhibit (or not) the production of a fluorescent signal, using recombinant CYP450 proteins (baculosomes; Invitrogen), substrates and inhibitors (Bidstrup, TB, et al., Br J Clin Pharmacol, 2003; 56(3): p. 305-14). As a positive control, a selective inhibitor for each CYP450 isoform was tested in the same plate (Table 5).
Table 5
Figure imgf000039_0001
IC50 > 10 μΜ means that the compound does not inhibit the CYP450. The results obtained demonstrated that Compound 100, like compounds A and B, does not inhibit the Cytochrome P450 enzymes tested, showing that Compound 100 is not likely to be influenced by drug-drug interaction effects. (Rizzo, G, et al., Mol Pharm, 2010; 78: 617-630). Example 6: Compound 100 does not inhibit human ERG potassium channel
To determine ion channel function, Predictor™ hERG Fluorescence Polarization assay was employed as it provides an efficient method for an initial determination of the propensity of test compounds to block the hERG channel (Dorn, A, et al. J Biomol Screen, 2005; 10(4): 339-47). The assay is based on the assumption that the hERG potassium channel activity contributes to the resting membrane potential in permanently transfected cells, and thus a block of hERG channels should result in a depolarization of the cell membrane. The assay was designed to identify potential hERG channel blockers by producing data that accurately correlates with patch-clamp electrophysiology studies. Results from the Predictor assay demonstrate a high correlation with those obtained from patch clamp techniques (Table 6) (Dorn, A, et al. J Biomol Screen, 2005; 10(4): 339-47).
Table 6
Figure imgf000040_0001
Table 6 show the comparison of IC50 values generated with the Predictor hERG Fluorescence Polarization assay with reported IC50 values from patch-clamp and radioligand displacment assays.
Membrane preparations from Chinese hamster ovary cells stably transfected with hERG potassium channel were used to evaluate the potential inhibitory effect of Compound 100 on this channel using the Predictor fluorescence polarization assay. Reduction of membrane polarization as a result of inhibition of the hERG potassium channel is directly correlated with a reduction of the fluorescence polarization (FP). The results show that like compounds A and B, Compound 100 does not block or inhibit the hERG potassium channel.
The assay was performed in triplicate by using a 16-point dose-response of test compound and the positive controls E-4031 and Tamoxifen. An IC50 of 15 nM (AmP = 163) for E-4031 and 1.4 μΜ (ΔητΡ = 183) for Tamoxifen were obtained. The assay window more than 100 mP (millipolarization) is considered good. Z' value was 0.78 indicates an excellent assay. The non-linear regression curves were obtained by GraphPad Prism (GraphPad Software Inc.) analysis, to calculate the IC50 values.
Briefly, signalling through FXR modulates a variety of metabolic pathways, so selective FXR modulators are attractive candidates for the treatment of a range of chronic diseases affecting liver, kidney, as well as metabolic diseases. Results in the examples described herein characterize Compound 100, as a potent and specific FXR agonist.
Remarkably, although it potently activated FXR, Compound 100 showed no activity against other nuclear receptors and did not active the bile acid GPCR TGR5. In addition to high nuclear receptor selectivity, Compound 100 possesses a pharmacological profile suitable for a drug candidate. Compound 100 shows no cytotoxic effect on human HepG2 liver cells, indicating a lack of liver toxicity, and does not inhibit any of the CYP450 enzymes tested, indicating that Compound 100 is devoid of significant drug-drug interaction risk. Further, Compound 100 does not inhibit the human ERG potassium channel.
The combined selectivity and potency of Compound 100 together with its favorable drug-like properties, in particular an excellent safety profile, make Compound 100 an attractive candidate for treating and preventing disease.
Example 7: Physiochemical properties of Compound 100
Physiochemical properties of Compound 100 such as water solubility, critical micellular concentration, surface tension and LogPA were determined using methods known in the art. These properties of Compound 100 were compared with natural and synthetic analogues (Table 7).
Table 7
Figure imgf000041_0001
Compound B, TCDCA and TUDCA which are highly soluble (hs);
b CMC: Critical Micellar Concentration determined in 0.15 M NaCl water solution;
° STcmc: Surface Tension at CMC in 0.15 M NaCl water solution;
d LogPA-: 1-octanol- water partition coefficient of the studied bile acids as ionized species; Example 8: Pharmacokinetics and metabolism in bile fistula rat after id and iv administration: in-vivo
The in-vivo models, rats, were administered single dose of Compound 100 at 1 μmol/min/Kg.l hour (see Figures 7A, 7B, and 7C). Figure 7A is a graph showing the choleretic effect of Compound 100 for id and iv administration. Figure 7B is a graph showing the secretion of Compound 100 over time for id and iv administration. Figure 7C is a graph showing the plasma concentration of Compound 100 over time. EQUIVALENTS
Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments and methods described herein. Such equivalents are intended to be encompassed by the scope of the present invention.
All patents, patent applications, and literature references cited herein are hereby expressly incorporated by reference.

Claims

or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof, wherein:
R1 is hydroxyl;
R2 is hydrogen, hydroxyl, alkyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more Ra;
R3 is hydrogen, hydroxyl, alkyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more Rb;
R4 is hydrogen, alkyl, alkenyl, alkynyl, or halogen, wherein said alkyl is unsubstituted or substituted with one or more Rc;
Ra, Rb, and Rc are each independently halogen or hydroxyl;
R5 is hydroxyl, OS03H, OS03 ", OCOCH3, OPO3H, OP03 2~, or hydrogen; and
R6 is hydroxyl, OSO3H, OS03 ", OCOCH3, OPO3H, OP03 2~, or hydrogen; or taken together R5 and R6 with the carbon atom to which they are attached form a carbonyl.
Figure imgf000043_0002
acceptable salt, solvate, or amino acid conjugate thereof.
3. The compound of claim 1, having formula III:
Figure imgf000044_0001
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
4. The compound of claim 1, having formula IV:
Figure imgf000044_0002
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
5. The compound of any one of claims 1-4, wherein the compound is the compound.
6. The compound of any one of claims 1-4, wherein the compound is the
pharmaceutically acceptable salt.
7. The compound of any one of claims 1-4, wherein the compound is the amino acid conjugate.
8. The compound of claim 7, wherein the amino acid conjugate is a glycine conjugate.
9. The compound of claim 7, wherein the amino acid conjugate is a taurine conjugate.
10. The compound of any one of claims 1-9, wherein one of R2 or R3 is hydroxyl or halogen and the remaining R2 or R3 is hydrogen or unsubstituted alkyl.
11. The compound of claim 10, wherein one of R2 or R3 is hydroxyl and the remaining R2 or R3 is hydrogen.
12. The compound of any one of claims 1-11, wherein one of R5 or R6 is hydroxyl and the remaining R5 or R6 is hydrogen.
13. The compound of any one of claims 1-12, wherein R2 is hydroxyl or halogen.
14. The compound of claim 13, wherein R2 is hydroxyl.
15. The compound of claim 13, wherein R2 is halogen. 16. The compound of any one of claims 1-12, wherein R3 is hydrogen or unsubstituted alkyl.
17. The compound of claim 16, wherein R3 is hydrogen.
The compound of claim 16, wherein R3 is methyl.
19. The compound of any one of claims 1-12, wherein R2 is hydroxyl and R3 is hydrogen.
20. The compound of any one of claims 1-19, wherein R5 is hydroxyl.
21. The compound of claim 20, wherein R6 is hydrogen.
22. The compound of any one of claims 1-14 and 16-21 , wherein R2 and R5 are hydroxyl and R3 and R6 are each hydrogen.
23. The compound of any one of claims 1-22, wherein R4 is alkyl or hydrogen.
The compound of claim 23, wherein R4 is unsubstituted alkyl 25. The compound of claim 24, wherein R4 is methyl, ethyl, propyl, or butyl.
26. The compound of claim 25, wherein R4 is methyl or ethyl.
27. The compound of claim 26, wherein R4 is methyl. The compound of claim 26, wherein R4 is ethyl.
Figure imgf000046_0001
or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
30. The compound of any one of claims 1-29, wherein the compound is an FXR agonist. 31. The compound of any one of claims 1-30, wherein the compound is not active against other nuclear receptors.
32. The compound of any one of claims 1-29, wherein the compound does not activate TGR5.
33. The compound of any one of claims 1-32, wherein the compound induces apoptosis.
34. The compound of any one of claims 1-33, wherein the compound shows no cytotoxic effect on human HepG2 liver cells.
35. The compound of any one of claims 1-34, wherein the compound does not inhibit one or more CYP450 isoforms selected from CYP1A2, CYP3A4 (green substrate), CYP3A4 (blue substrate), CYP2C9, CYP2C19, CYP2D6, and CYP2E1. 36. The compound of any one of claims 1-35, wherein the compound does not inhibit the human ERG potassium channel.
37. A method of synthesizing a compound according to any one of claims 1-29 or a pharmaceutically acceptable salt, solvate or amino acid conjugate thereof.
38. A kit containing one or more compounds according to any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjutate thereof. 39. The kit of claim 38 further containing a pharmaceutically acceptable ingredient.
40. A pharmaceutical composition comprising a compound of any one of claims 1-29 and a pharmaceutically acceptable excipient. 41. A method of treating or preventing a disease or condition in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjutate thereof.
42. The method of claim 41, wherein the disease or condition is an FXR-mediated disease or condition.
43. The method of claim 42, wherein the disease or condition is mediated by decreased FXR activity. 44. The method of any one of claims 41-43, wherein said disease is selected from cardiovascular disease, chronic liver disease, lipid disorder, gastrointestinal disease, renal disease, metabolic disease, cancer, and neurological disease.
45. The method of claim 44, wherein the disease is cardiovascular disease selected from atherosclerosis, arteriosclerosis, dyslipidemia, hypercholesteremia, hyperlipidemia, hyperlipoproteinemia, and hypertriglyceridemia.
46. The method of claim 44, wherein the disease is chronic liver disease selected from primary biliary cirrhosis (PBC), cerebrotendinous xanthomatosis (CTX), primary sclerosing cholangitis (PSC), drug induced cholestasis, intrahepatic cholestasis of pregnancy, parenteral nutrition associated cholestasis (PNAC), bacterial overgrowth or sepsis associated cholestasis, autoimmune hepatitis, chronic viral hepatitis, alcoholic liver disease,
nonalcoholic fatty liver disease (NAFLD), nonalcoholic steatohepatitis (NASH), liver transplant associated graft versus host disease, living donor transplant liver regeneration, congenital hepatic fibrosis, choledocholithiasis, granulomatous liver disease, intra- or extrahepatic malignancy, Sjogren's syndrome, Sarcoidosis, Wilson's disease, Gaucher' s disease, hemochromatosis, and alpha 1 -antitrypsin deficiency. 47. The method of claim 44, wherein the disease is gastrointestinal disease selected from inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), bacterial overgrowth, malabsorption, post-radiation colitis, and microscopic colitis.
48. The method of claim 47, wherein the inflammatory bowel disease is selected from Crohn's disease and ulcerative colitis.
49. The method of claim 44, wherein the disease is renal disease selected from diabetic nephropathy, focal segmental glomerulosclerosis (FSGS), hypertensive nephrosclerosis, chronic glomerulonephritis, chronic transplant glomerulopathy, chronic interstitial nephritis, and polycystic kidney disease.
50. The method of claim 44, wherein the disease is metabolic disease selected from insulin resistance, hyperglycemia, diabetes mellitus, diabesity, and obesity. 51. The method of claim 50, wherein the diabetes mellitus is type I diabetes.
52. The method of claim 50, wherein the diabetes mellitus is type II diabetes.
53. The method of claim 44, wherein the disease is cancer.
54. The method of claim 53, wherein the cancer is colorectal cancer.
55. A method of reducing cholesterol levels and/or modulating cholesterol metabolism, catabolism, absorption of dietary cholesterol, and reverse cholesterol transport in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
56. A method of treating or preventing a disease affecting cholesterol, triglyceride, or bile acid levels in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
57. A method of treating or preventing one or more symptoms of disease affecting lipid metabolism in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or a amino acid conjugate thereof.
58. A method of treating or preventing a disease state associated with an elevated cholesterol level in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
59. The method of claim 58, wherein the disease state is selected from coronary artery disease, angina pectoris, carotid artery disease, strokes, cerebral arteriosclerosis, and xanthoma. 60. A method of treating or preventing one or more symptoms of cholestasis in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. 61. A method of treating or preventing gallstones in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
62. A method of lowering triglycerides in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
63. A method of treating or preventing metabolic syndrome in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. 64. A method of treating or preventing cholesterol gallstone disease in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. 65. A method of decreasing lipid accumulation in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
66. A method of enhancing liver regeneration in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
67. The method of claim 66, wherein the method is enhancing liver regeneration for liver transplantation.
68. A method of treating or preventing fibrosis in a subject comprising administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof. 69. A method of treating or preventing organ fibrosis in a subject comprising
administering to the subject in need thereof an effective amount of a compound of any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
70. The method of claim 69, wherein the fibrosis is liver fibrosis.
71. The method of claim 44, wherein the disease is neurological disease.
72. The method of claim 71, wherein the neurological diease is stroke.
73. The method of any one of claims 41-72, wherein the compound or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof is administered by a route selected from oral, parenteral, intramuscular, intranasal, sublingual, intratracheal, inhalation, ocular, vaginal, rectal, and intracerebroventricular.
74. The method of claim 73, wherein the route is oral.
The method of any one of claims 41-74, wherein the compound is an FXR agonist.
The method of claim 75, wherein the compound is a selective FXR agonist.
The method of any one of claims 41-76, wherein the compound does not activate
78. The method of any one of claims 41-77, wherein the compound induces apoptosis.
79. A method of regulating the expression level of one or more genes in a cell, wherein said genes are involved in bile acid homeostasis by administereing to the cell a compound according to any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
80. A method of down regulating the expression level of one or more genes selected from CYP7al and SREBP-IC in a cell by administering to the cell a compound according to any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
81. A method of up regulating the expression level of one or more genes selected from OSTa, OSTb, BSEP, SHP, UGT2B4, MRP2, FGF-19, PPARy, PLTP, APOCII, and PEPCK in a cell by administering to the cell a compound according to any one of claims 1-29 or a pharmaceutically acceptable salt, solvate, or amino acid conjugate thereof.
PCT/EP2014/059896 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators WO2014184271A1 (en)

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SG11201509352XA SG11201509352XA (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
BR112015028399-3A BR112015028399B1 (en) 2013-05-14 2014-05-14 11-HYDROXYL DERIVATIVES OF BILIARY ACIDS AND AMINO ACID CONJUGATES THEREOF AS FARNESOID X RECEPTOR MODULATORS, PHARMACEUTICAL COMPOSITION AND USE OF REFERRED TO DERIVATIVES
EP18163623.4A EP3360882B1 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
NZ714082A NZ714082B2 (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
SI201430701T SI2997035T1 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
RS20180690A RS57372B1 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
JP2016513357A JP6326131B2 (en) 2013-05-14 2014-05-14 11-hydroxyl derivatives of bile acids and their amino acid conjugates as farnesoid X receptor modulators
TN2015000497A TN2015000497A1 (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
ES14723820.8T ES2671427T3 (en) 2013-05-14 2014-05-14 11-Hydroxyl-6-substituted derivatives of bile acids and amino acid conjugates thereof as farnesoid receptor X modulators
UAA201511098A UA118673C2 (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
CN201480036949.5A CN105377870B (en) 2013-05-14 2014-05-14 11 hydroxy derivatives and its amino acid conjugates as the bile acid of farnesoid X receptor conditioning agent
EA201592055A EA030152B1 (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
MX2015015730A MX352065B (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators.
KR1020157034951A KR102229952B1 (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnensoid x receptor modulators
AU2014267324A AU2014267324B2 (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid X receptor modulators
PL18163623T PL3360882T3 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
EP20211780.0A EP3848038B1 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
EP18163622.6A EP3360881B1 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
LTEP14723820.8T LT2997035T (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
MEP-2018-159A ME03082B (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
PL18163622T PL3360881T3 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
DK14723820.8T DK2997035T3 (en) 2013-05-14 2014-05-14 11-HYDROXY-6-SUBSTITUTED BALIC ACID DERIVATIVES AND AMINO ACID CONJUGATES THEREOF AS FARNESOID X RECEPTOR MODULATORS
PL14723820T PL2997035T3 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
EP14723820.8A EP2997035B8 (en) 2013-05-14 2014-05-14 11-hydroxyl-6-substituted-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
CA2912139A CA2912139C (en) 2013-05-14 2014-05-14 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
MA38647A MA38647B1 (en) 2013-05-14 2014-05-14 11-Hydroxy Bile Acid Derivatives and their Amino Acid Conjugates as Farnesoid Receptor Modulators x
SA515370140A SA515370140B1 (en) 2013-05-14 2015-11-12 11 -Hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
IL242555A IL242555B (en) 2013-05-14 2015-11-12 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
PH12015502576A PH12015502576B1 (en) 2013-05-14 2015-11-13 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
CR20150643A CR20150643A (en) 2013-05-14 2015-12-07 11-HYDROXYL DERIVATIVES OF BILIARY ACIDS AND CONJUGATES OF AMINO ACIDS OF THE SAME AS MODULATORS OF THE FARNESOID X RECEIVER
HK16109719.3A HK1221471A1 (en) 2013-05-14 2016-08-15 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators x 11-
US15/434,685 US20170216316A1 (en) 2013-05-14 2017-02-16 Farnesoid x receptor modulators
CY20181100583T CY1122614T1 (en) 2013-05-14 2018-06-01 11-hydroxyl-6-substituted-cholic acid derivatives and their amino acid conjugates as farnesoid X-receptor regulators
HRP20180931TT HRP20180931T1 (en) 2013-05-14 2018-06-15 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
US16/124,139 US10532061B2 (en) 2013-05-14 2018-09-06 Farnesoid X receptor modulators
US16/695,528 US11000532B2 (en) 2013-05-14 2019-11-26 Farnesoid x receptor modulators
IL272718A IL272718B (en) 2013-05-14 2020-02-17 11-hydroxyl-derivatives of bile acids and amino acid conjugates thereof as farnesoid x receptor modulators
US17/228,819 US20210228599A1 (en) 2013-05-14 2021-04-13 Farnesoid x receptor modulators
US18/295,091 US20230233581A1 (en) 2013-05-14 2023-04-03 Farnesoid x receptor modulators

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