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
  • A61K31/33—Heterocyclic compounds
  • A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
  • A61K31/34—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having five-membered rings with one oxygen as the only ring hetero atom, e.g. isosorbide
  • A61K31/343—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having five-membered rings with one oxygen as the only ring hetero atom, e.g. isosorbide condensed with a carbocyclic ring, e.g. coumaran, bufuralol, befunolol, clobenfurol, amiodarone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
  • A61K47/34—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/0012—Galenical forms characterised by the site of application
  • A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
  • A61K9/0024—Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
  • A61P35/02—Antineoplastic agents specific for leukemia

Definitions

• n-Butylidenephthalide is a chemical compound isolated from Angelica sinensis. It can be used to treat various tumors, e.g., gliobastoma multiforme and breast cancer. See, e.g., Tsai et al., Clin. Cancer Res. 2005, 11(9): 3475-3484 and Tsai, et al., J Neurochem. 2006, 99(4): 1251-62.
• delivering n-butylidenephthalide to the cancer site in a selective and sustained manner is critical for its use in effective cancer therapy. This is especially important for treating brain cancer, where the drug is difficult to reach the disease area because of the blood brain barrier. There is a need of developing effective ways for delivering the drug.
• This invention is based on a discovery that a pharmaceutical formulation, from which n-butylidenephthalide, in particular, the Z-from (i.e. (Z)-n-butylidenephthalide, z-butylidenephthalide, and z-Bdph), can be gradually released over a long period, e.g., more than 30 days, and that z-Bdph, rather than E-from (i.e., (E)-n-butylidenephthalide, e-butylidenephthalide, and e-Bdph), has antitumor effects.
• Z-n-butylidenephthalide i.e. (Z)-n-butylidenephthalide, z-butylidenephthalide, and z-Bdph
• E-from i.e., (E)-n-butylidenephthalide, e-butylidenephthalide, and e-Bdph
• this invention features a pharmaceutical formulation, which contains (i) z-butylidenephthalide and (ii) a polymer, which are admixed together.
• the polymer can be poly(lactic-co-glycolic acid), a chitosan, a collagen, a hydrogel, or a polyanhydride, e.g., a polyanhydride prepared from bis(p-carboxyphenozy) propane, bis(p-carboxyphenoxy)butane, bis(p-carboxyphenoxy)pentane, bis(p-carboxyphenoxy)heptane, bis(p-carboxyphenoxy)hexane, bis(p-carboxyphenoxy) octane, isophthalic acid, 1,4-phenylene dipropionic acid, dodecanedioic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, phthalic acid, isophthalic acid, terephthalic acid, or a mixture thereof.
• a polyanhydride
• An example of the formulation is a mixture of z-butylidenephthalide and polyanhydride p(CPP-SA), which is prepared from bis(p-carboxyphenoxy)propane (CPP) and the sebacic acid (SA).
• the ratio between the bis(p-carboxyphenoxy) propane and the sebacic acid is preferably 1:2 to 1:10 (e.g., 1:4).
• the weight percentage of the z-butylidenephthalide is 3%-50% (e.g., 3%-20%, 10%, and 15%) of the formulation.
• the formulation can in form of powders, wafers, sheets, rods, microspheres, nanospheres, paste, or glue.
• this invention features use of the above-described pharmaceutical formulation to treat tumor.
• tumor to be treated include, but are limited to, glioblastoma multiforme, lung cancer, hepatocellular carcinoma, colon cancer, melanoma, breast cancer, neuroblastoma, teratoma, and human leukemia.
• One aspect of this invention relates to a pharmaceutical formulation containing n-butylidenephthalide, in particular, its z form, z-butylidenephthalide, and a polymer.
• the formulation can be used in inhibiting growth of tumors, such as glioblastoma multiforme.
• z-butylidenephthalide used to practice this invention is commercially available, e.g., from Lancaster Synthesis Ltd. (UK). It can also be isolated from a chloroform extract of Angelica sinensis. See, e.g., Tsai et al., Clin. Cancer Res. 2005, 11(9): 3475-3484.
• the z-butylidenephthalide compound either purchased or isolated, can be further purified by flash column chromatography, high performance liquid chromatography, crystallization, or any other suitable methods.
• the polymer used to practice this invention either is commercially available or can be prepared by known methods in the art. For example, one can reflux a diacid compound in acetic anhydride to obtain a polyanhydride.
• the polymer may be a copolymer.
• a copolymer can be prepared from two different polyanhydride moieties using the melt polycondensation process. See, e.g., Domb et al., Journal of polymer science, 1987, 25: 3373-3386.
• the obtained polymer can be purified by any suitable method and characterized by NMR, MS, or FT-IR.
• the z-butylidenephthalide and the polymer e.g., a polyanhydride
• the desired ratio e.g. 10 parts by weight the z-butylidenephthalide and 90 parts by weight the polyanhydride.
• a solvent e.g., methylene chloride
• the thus obtained mixture can be further processed into various forms such as wafers, sheets, rods, microspheres, nanospheres, paste, or glue.
• various forms such as wafers, sheets, rods, microspheres, nanospheres, paste, or glue.
• a mold to compress the mixture into wafers.
• composition which (i) is suitable for administration to a human being or other mammal or which can be treated, e.g. sterilized, to make it suitable for such administration, and (ii) comprises at least one drug (e.g., z-butylidenephthalide) and at least one of the above-mentioned polymers.
• drug e.g., z-butylidenephthalide
• the formulation can be part or all of any device that can deliver a drug, including pills, capsules, gels, depots, medical implantable devices (e.g., stents, including self-expanding stents, balloon-expandable stents, drug-eluting stents and stent-grafts, grafts (e.g., aortic grafts), artificial heart valves, cerebrospinal fluid shunts, pacemaker electrodes, endocardial leads, bioerodable implants and the like), and externally manipulated devices (e.g. drug devices and catheters, including catheters which can release a drug, e.g. as a result of heating the tip of the catheter).
• medical implantable devices e.g., stents, including self-expanding stents, balloon-expandable stents, drug-eluting stents and stent-grafts, grafts (e.g., a
• the pharmaceutical formulation may also include one or more other additives, for example pharmaceutically acceptable excipients, carriers, penetration enhancers, stabilizers, buffers or other materials physically associated with the drug and/or the polymer to enhance the deliverability of the dosage form and/or the effectiveness of the drug.
• the formulation may be, for example, a liquid, a suspension, a solid (such as a tablet, pill, and capsule, including a microcapsule), emulsion, micelle, ointment, gel, emulsion, depot (including a subcutaneously implanted depot), or coating on an implanted device, e.g. a stent or the like.
• the formulation can for example be applied externally, e.g. as a patch, or a device applied partly externally and partly implanted, or completely implanted or injected subcutaneously.
• drug means a material which is biologically active in a human being or other mammal, locally and/or systemically.
• drugs are disclosed in the Merck Index, the Physicians Desk Reference, and in column 11, line 16, to column 12, line 58, of U.S. Pat. No. 6,297,337, and in paragraph 0045 of US 2003/0224974, the entire disclosures of which are incorporated by reference herein for all purposes.
• Drugs can for example be substances used for the treatment, prevention, diagnosis, cure or mitigation of a disease or illness, including vitamins and mineral supplements; substances which affect the structure or the function of a mammal; pro-drugs, which are substances which become biologically active or more active after they have been placed in a physiological environment; and metabolites of drugs.
• diagnostic agents are imaging agents containing radioisotopes, contrasting agents containing for example iodine, enzymes, fluorescent substances and the like.
• the formulation of this invention may also contain suitable additives. These additives can be included in the formulation at any stage of the preparation of the formulation.
• the desired concentrations of the additives in the formulation for conferring the intended effect can be assayed using conventional methods.
• this invention upon contact with fluid, releases z-butylidenephthalide—an antitumor agent.
• this invention also relates to a method of treating tumor by administering an effective amount of the formulation to a subject in need thereof.
• the butylidenephthalide in the formulation is slowly and continuously released into the adjacent tissue with in a certain period of time, e.g., 20, 30, 35, 40, 50, 60 days.
• treating is defined as the administration of an effective amount of the formulation to a subject, who has tumor, a symptom of tumor, a disease or disorder secondary to tumor, or a predisposition toward tumor, with the purpose to cure, alleviate, relieve, remedy, or ameliorate the tumor, the symptom of the tumor, the disease or disorder secondary to the tumor, or the predisposition toward the tumor.
• a “subject” refers to a human and a non-human animal.
• a non-human animal include all vertebrates, e.g., mammals, such as non-human primates (particularly higher primates), dog, rodent (e.g., mouse or rat), guinea pig, cat, and non-mammals, such as birds, amphibians, reptiles, etc.
• the subject is a human.
• the subject is an experimental animal or animal suitable as a disease model.
• a subject to be treated for a tumor, cancer, or other cellular proliferative disorder can be identified by standard diagnosing techniques for the disorder.
• an effective amount refers to an amount of a formulation or a compound which confers a therapeutic effect on the subject to be treated.
• the treatment method can be performed in vivo or ex vivo, alone or in conjunction with other drugs or therapy.
• a compound or a formulation is administered to a subject.
• the compound or formulation is prepared in a pharmaceutically-acceptable carrier (e.g., physiological saline) and administered orally or by intravenous infusion, or injected or implanted subcutaneously, intramuscularly, intrathecally, intraperitoneally, intrarectally, intravaginally, intranasally, intragastrically, intratracheally, or intrapulmonarily.
• the dosage required depends on the choice of the route of administration; the nature of the formulation; the nature of the patient's illness; the subject's size, weight, surface area, age, and sex; other drugs being administered; and the judgment of the attending physician. It can be adjusted by one skilled in the art, e.g., a nutritionist, dietician, or treating physician, in conjunction with the subject's response. Suitable dosages are in the range of 0.01-100 mg/kg. Variations in the needed dosage are to be expected in view of the variety of compounds available and the different efficiencies of various routes of administration.
• the formulation can be used together with surgery or radiotherapy. It can also be used in combination with one or more other chemotherapeutic agents.
• the chemotherapeutic agents may be, for example, camptothecins such as topotecan, anthracycline antibiotics such as doxorubicin, alkylating agents such as cyclophosphamide, or antimicrotubule agents such as paclitaxel, temozolomide, or carmustin.
• SA monomer was recrystallized twice from alcohol. 2.7 g SA monomer was refluxed in 60 ml acetic anhydride for 30 minutes (mins) at 135-140° C. under vacuum (10 ⁇ 4 torr). The unreacted acetic anhydride was removed. The SA prepolymer was dried under vacuum at 60° C. and then dissolved in dry toluene. The solution was added to a 1:1 v/v mixture of dry ethyl ether and petroleum ether at a volume ratio of 1:10 and allowed to sit overnight to precipitate out the SA prepolymer (10:1 v/v). After the ethyl ether and petroleum ether were removed, the SA prepolymer was dried under vacuum.
• CPP prepolymer and SA prepolymer at a ratio of 20:80 were charged into a glass tube (2 ⁇ 20 cm) and heated at 180° C. in an oil bath for 1 min. The pressure was reduced to 10 ⁇ 4 mmHg. The vacuum was eliminated at every 15 min throughout polymerization. The tube was washed with dichloromethane and then petroleum ether was added to precipitate out p(CPP-SA) copolymer, which was washed with anhydrous ether and dried under vacuum.
• the p(CPP-SA) copolymer was characterized by IR and 1 H NMR.
• the characteristic signal of anhydride bond was observed at 1812.76 cm ⁇ 1 .
• the characteristic signals of aromatic protons of CPP were observed at 6.9-8.2 ppm, and the characteristic signal of methylene protons of SA was measured at 1.3 ppm.
• the ratio of CPP and SA in the copolymer was identified as 1:4 ⁇ 1:5 according to characteristic peak intensity of CPP and SA in the 1 H NMR spectroscopy.
• p(CPP-SA) polymer was mixed with z-Bdph to provide a mixture containing 3% or 10% by weight z-Bdph.
• a mixture containing 97% p(CPP-SA) and 3% 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) was also prepared. Each mixture was dissolved in methylene chloride at the concentration of 10% (w/v). The solution was dried under vacuum for 72 h.
• the thus-obtained dry powder was compressed to form z-Bdph p(CPP-SA) discs (100 mg/disc) using a stainless steel mold (internal diameter, 13 mm) under light pressure from a Carver Press at 200 psi as described in Walter et al., Cancer Res. 1994, 54(8): 2207-12; Leong et al., J Biomed Mater Res. 1985, 19(8): 941-55; and Storm et al. J Neurooncol. 2002, 56(3): 209-17.
• BCNU p(CPP-SA) discs of the same size were also prepared by compression molding.
• Assays were conducted to examine the growth inhibitory effects of p(CPP-SA)-10% z-Bdph on RG2 rat glioblastoma multiforme (GBM) cells.
• RG2 cells were treated with 10% Bdph-wafer for 24 hrs. Cell viability were determined by MTT assay. It was found that the growth inhibitory effects of p(CPP-SA)-10% z-Bdph were 50% compared with control.
• the morphology of GBM cells gradually changed and detaching of the cells from the bottom of culture plate was observed after treatment. Compared to untreated cells, most of the detached GBM cells were apoptotic after p(CPP-SA)-10% z-Bdph treatment.
• RG2 cells were incubated with IC 50 concentration of z-Bdph for various time periods (0, 0.5, 1, 3, and 6 h). After incubation, cells were collected and total RNA isolated. Expression of GADPH was used as an internal control.
• DBTRG-05NG cells human GBM cells
• Bdph 100 ⁇ g/mL
• Rhodamine-conjugated anti-IgG secondary antibody corresponding Rhodamine-conjugated anti-IgG secondary antibody.
• cells were stained with DAPI to display the nuclei.
• the fluorescent images were visualized with a fluorescence microscope. The result showed that, Nur77 was much more abundant in the nucleus than in the cytosol.
• Nur77 was translocated from the nucleus to the cytoplasm.
• cytosolic and nucleus fractions of cells were examined by Western blot analysis.
• RG2 cells were plated on 10 cm dishes and incubated to 90% confluence. The cells were treated with Bdph (100 ⁇ g/ml) for different time periods (0, 6, 12, 24 and 48 hours). The cells were harvested, and nuclear and cytoplasmic fractions were isolated. Western blot analysis showed that Nur77 was predominantly localized in the nucleus in the absence of z-Bdph treatment.
• mice Male F344 rats (230-260 g) and male Foxn1 nu/nu mice (10-12 weeks) were obtained from National Laboratory Animal Center (Taipei, Taiwan). All procedures were performed in compliance with the standard operation procedures of the Laboratory Animal Center of National Tau Hwa University (Hualien, Taiwan) and China Medical University Hospital (Taichung, Taiwan). RG2 cells and DBTRG-05MG cells were used in animal experiments to monitor the anti-tumor activities of p(CPP-SA)-3% or 10% z-Bdph formulations and p(CPP-SA)-3% BCNU.
• Foxn1 nu/nu mice received subcutaneous implantation of DBTRG-05MG cells, and subcutaneous implantation of p(CPP-SA)-3%, p(CPP-SA)-10% z-Bdph formulations, p(CPP-SA)-3% BCNU, or polymer alone at least 1.5 cm removed from the original injection site after the tumor cell implantation.
• RG2 cells (5 ⁇ 10 6 ) were implanted subcutaneously into the hind flank region of F344 rats. After five days of RG2 cell transplantation, the rats were treated subcutaneously with p(CPP-SA)-3% z-Bdph, p(CPP-SA)-10% z-Bdph, p(CPP-SA) alone, or p(CPP-SA)-3% BCNU.
• Average tumor sizes at day 30 were 2070.79 ⁇ 784.90 mm 3 for the control (untreated) group, 1586.30 ⁇ 243.69 mm 3 in the p(CPP-SA) treated group, 346.71 ⁇ 521.68 mm 3 in the p(CPP-SA)-3% z-Bdph treated group, 87.89 ⁇ 167.44 mm 3 in the p(CPP-SA)-10% z-Bdph treated group, and 357.48 ⁇ 27.30 mm 3 in the p(CPP-SA)-3% BCNU treated group.
• mice were inoculated with human DBTRG-05MG cells (2 ⁇ 10 6 ) and implanted with p(CPP-SA)-z-Bdph (0%, 3% 10%) at day 5. Significant suppressions of tumor growth in the 3% and 10% z-Bdph-wafer treated groups was observed.
• the mean values of tumor sizes at day 39 were 1098.46 ⁇ 170.11 in the control group, 605.8 ⁇ 98.8 mm 3 in p(CPP-SA)-3% z-Bdph treated group, and 504.4 ⁇ 38.9 mm 3 in p(CPP-SA)-10% z-Bdph treated group (p ⁇ 0.05).
• the invasion of DBTRG-05MG cells was examined using a BioCoat matrigel invasion chamber system (BD Bioscience, Bedford, Mass.).
• the BD matrigel Matrix is composed of laminin, collagen IV, nidogen/entrctin, and proteoglycan on polyethylene terephthalate (PET) membranes containing 8 ⁇ m pores.
• PET polyethylene terephthalate
• RT-PCR Reverse transcriptase-polymerase chain reaction
• Ax1 i.e., by transfecting a pcDNA3.0-Ax1 plasmid into the GBM cells
• z-Bdph the over-expression of Ax1 (i.e., by transfecting a pcDNA3.0-Ax1 plasmid into the GBM cells) could reverse the inhibitory effect of z-Bdph on Ax1 mediated proliferation, migration and invasion of the GBM cells.

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