US20120128628A1 - COMBINATION OF A NUCLEOSIDE POLYMERASE INHIBITOR WITH A MACROCYCLIC PROTEASE INHIBITOR AND USE THEREOF IN THE TREATMENT OF HEPATITIS C, LIVER FIBROSIS AND IMPAIRED LIVER FUNCTION (as amended) - Google Patents

COMBINATION OF A NUCLEOSIDE POLYMERASE INHIBITOR WITH A MACROCYCLIC PROTEASE INHIBITOR AND USE THEREOF IN THE TREATMENT OF HEPATITIS C, LIVER FIBROSIS AND IMPAIRED LIVER FUNCTION (as amended) Download PDF

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US20120128628A1
US20120128628A1 US13/203,334 US201013203334A US2012128628A1 US 20120128628 A1 US20120128628 A1 US 20120128628A1 US 201013203334 A US201013203334 A US 201013203334A US 2012128628 A1 US2012128628 A1 US 2012128628A1
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compound
pharmaceutically acceptable
prodrug
acceptable salt
composition
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Steven B. Porter
Williamson Ziegler Bradford
Patrick F. Smith
Ellen S. Yetzer
Abel De La Rosa
Michael D. Rogers
William T. Symonds
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    • 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
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • 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
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/47—Quinolines; Isoquinolines
    • A61K31/4709—Non-condensed quinolines and containing further heterocyclic rings
    • 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
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
    • A61K31/7042—Compounds having saccharide radicals and heterocyclic rings
    • A61K31/7052—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides
    • A61K31/706—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom
    • A61K31/7064—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines
    • A61K31/7068—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines having oxo groups directly attached to the pyrimidine ring, e.g. cytidine, cytidylic acid
    • 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
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12—Antivirals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12—Antivirals
    • A61P31/14—Antivirals for RNA viruses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2121/00—Preparations for use in therapy

Definitions

  • the present application relates to compositions and methods for the treatment of a disease condition such as a hepatitis C virus infection, liver fibrosis, and impaired liver function.
  • a disease condition such as a hepatitis C virus infection, liver fibrosis, and impaired liver function.
  • HCV infection is the most common chronic blood borne infection in the United States. Although the numbers of new infections have declined, the burden of chronic infection is substantial, with Centers for Disease Control estimates of 3.9 million (1.8%) infected persons in the United States.
  • Chronic liver disease is the tenth leading cause of death among adults in the United States, and accounts for approximately 25,000 deaths annually, or approximately 1% of all deaths. Studies indicate that 40% of chronic liver disease is HCV-related, resulting in an estimated 8,000-10,000 deaths each year. HCV-associated end-stage liver disease is the most frequent indication for liver transplantation among adults.
  • Antiviral therapy of chronic hepatitis C has evolved rapidly over the last decade, with significant improvements seen in the efficacy of treatment. Nevertheless, even with using the standard of care (SOC) combination therapy of pegylated IFN- ⁇ plus ribavirin, 40% to 50% of patients fail therapy, i.e., are nonresponders or relapsers. These patients currently have no effective therapeutic alternative. In particular, patients who have advanced fibrosis or cirrhosis on liver biopsy are at significant risk of developing complications of advanced liver disease, including ascites, jaundice, variceal bleeding, encephalopathy, and progressive liver failure, as well as a markedly increased risk of hepatocellular carcinoma.
  • SOC standard of care
  • HCV is an enveloped positive strand RNA virus in the Flaviviridae family.
  • the single strand HCV RNA genome is approximately 9500 nucleotides in length and has a single open reading frame (ORF) encoding a single large polyprotein of about 3000 amino acids. In infected cells, this polyprotein is cleaved at multiple sites by cellular and viral proteases to produce the structural and non-structural (NS) proteins of the virus (NS2, NS3, NS4, NS4A, NS4B, NS5A, and NS5B).
  • ORF open reading frame
  • compositions that can include a first compound, or a pharmaceutically acceptable salt or prodrug thereof, wherein the first compound is ⁇ -D-2′-deoxy-2′-fluoro-2′-C-methylcytidine (Compound 1); and a second compound, or a pharmaceutically acceptable salt or prodrug thereof, wherein the second compound is (1S,4R,6S,14S,18R)-4-Fluoro-1,3-dihydro-isoindole-2-carboxylic acid 14-tert-butoxycarbonylamino-4-cyclopropanesulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-tricyclo[14.3.0.04,6]nonadec-7-en-18-yl ester (Compound 2).
  • compositions that consist essentially of a first compound, or a pharmaceutically acceptable salt or prodrug thereof, wherein the first compound is Compound 1; and a second compound, or a pharmaceutically acceptable salt or prodrug thereof, wherein the second compound is Compound 2.
  • Embodiments described herein relate to the use of such compositions for ameliorating or treating a disease condition in a patient population, and/or for the preparation of a medicament for ameliorating or treating such a disease condition.
  • the disease condition can be selected from a hepatitis C virus infection, liver fibrosis, and impaired liver function.
  • the prodrug of the first compound can be the diisobutyl ester prodrug of ⁇ -D-2′-deoxy-2′-fluoro-2′-C-methylcytidine (Compound 1a).
  • the salt of the second compound can be the sodium salt of 1S,4R,6S,14S,18R)-4-Fluoro-1,3-dihydro-isoindole-2-carboxylic acid 14-tert-butoxycarbonylamino-4-cyclopropanesulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-tricyclo[14.3.0.04,6]nonadec-7-en-18-yl ester (sodium salt of Compound 2).
  • Compound 1 or a pharmaceutically acceptable salt or prodrug thereof for ameliorating or treating a disease condition in a patient population, and/or for the preparation of a medicament for ameliorating or treating such a disease condition, wherein Compound 1 or a pharmaceutically acceptable salt or prodrug thereof is for use, and/or is manufactured for use, in combination with Compound 2 or a pharmaceutically acceptable salt or prodrug thereof.
  • Another embodiment described herein relates to the use of Compound 2 or a pharmaceutically acceptable salt or prodrug thereof for ameliorating or treating a disease condition in a patient population, and/or for the preparation of a medicament for ameliorating or treating such a disease condition, wherein Compound 2 or a pharmaceutically acceptable salt or prodrug thereof is for use, and/or is manufactured for use, in combination with Compound 1 or a pharmaceutically acceptable salt or prodrug thereof.
  • the disease condition can be selected from a hepatitis C virus infection, liver fibrosis, and impaired liver function.
  • inventions described herein relate to methods for ameliorating or treating a disease condition in a patient population that can include administering a therapeutically effective amount of a first compound, or a pharmaceutically acceptable salt or prodrug thereof, wherein the first compound is Compound 1; and a therapeutically effective amount of a second compound, or a pharmaceutically acceptable salt or prodrug thereof, wherein the second compound is Compound 2 to a subject suffering from the disease condition.
  • the disease condition can be selected from a hepatitis C virus infection, liver fibrosis, and impaired liver function.
  • the prodrug of the first compound can be the diisobutyl ester prodrug of ⁇ -D-2′-deoxy-2′-fluoro-2′-C-methylcytidine (Compound 1a).
  • the salt of the second compound can be the sodium salt of 1S,4R,6S,14S,18R)-4-Fluoro-1,3-dihydro-isoindole-2-carboxylic acid 14-tert-butoxycarbonylamino-4-cyclopropanesulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-tricyclo[14.3.0.04,6]nonadec-7-en-18-yl ester (sodium salt of Compound 2).
  • FIG. 1 shows the structures of ⁇ -D-2′-deoxy-2′-fluoro-2′-C-methylcytidine (Compound 1), the diisobutyl ester prodrug of ⁇ -D-2′-deoxy-2′-fluoro-2′-C-methylcytidine (Compound 1a) and (1S,4R,6S,14S,18R)-4-Fluoro-1,3-dihydro-isoindole-2-carboxylic acid 14-tert-butoxycarbonylamino-4-cyclopropanesulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-tricyclo[14.3.0.04,6]nonadec-7-en-18-yl ester (Compound 2).
  • FIGS. 2 and 3 show a pictorial representation of seven treatment regimes using the compounds shown in FIG. 1 .
  • FIG. 4 is a graph showing the changes in the level of serum alanine aminotransferase (ALT) over 14 days of treatment with Compound 1a and Compound 2.
  • Embodiments include, but are not limited to, therapeutic compositions and their use in the treatment and/or amelioration of a disease condition.
  • the disease condition can be selected from a hepatitis C virus infection, liver fibrosis, and/or impaired liver function.
  • pharmaceutically acceptable salt refers to a salt of a compound that does not cause significant irritation to an organism to which it is administered and does not abrogate the biological activity and properties of the compound.
  • the salt is an acid addition salt of the compound.
  • Pharmaceutical salts can be obtained by reacting a compound with inorganic acids such as hydrohalic acid (e.g., hydrochloric acid or hydrobromic acid), sulfuric acid, nitric acid, phosphoric acid and the like.
  • compositions can also be obtained by reacting a compound with an organic acid such as aliphatic or aromatic carboxylic or sulfonic acids, for example acetic, succinic, lactic, malic, tartaric, citric, ascorbic, nicotinic, methanesulfonic, ethanesulfonic, p-toluensulfonic, salicylic or naphthalenesulfonic acid.
  • organic acid such as aliphatic or aromatic carboxylic or sulfonic acids, for example acetic, succinic, lactic, malic, tartaric, citric, ascorbic, nicotinic, methanesulfonic, ethanesulfonic, p-toluensulfonic, salicylic or naphthalenesulfonic acid.
  • Pharmaceutical salts can also be obtained by reacting a compound with a base to form a salt such as an ammonium salt, an alkali metal salt, such as a sodium or a potassium salt, an alkaline earth metal salt, such as a calcium or a magnesium salt, a salt of organic bases such as dicyclohexylamine, N-methyl-D-glucamine, tris(hydroxymethyl)methylamine, C 1 -C 7 alkylamine, cyclohexylamine, triethanolamine, ethylenediamine, and salts with amino acids such as arginine, lysine, and the like.
  • the sodium salt of Compound 2 is a non-limiting example of a pharmaceutically acceptable salt.
  • a “prodrug” refers to an agent that is converted into the parent drug in vivo. Prodrugs are often useful because, in some situations, they may be easier to administer than the parent drug. They may, for instance, be bioavailable by oral administration whereas the parent is not. The prodrug may also have improved solubility in pharmaceutical compositions over the parent drug.
  • An example, without limitation, of a prodrug would be a compound which is administered as an ester (the “prodrug”) to facilitate transmittal across a cell membrane where water solubility is detrimental to mobility but which then is metabolically hydrolyzed to the carboxylic acid, the active entity, once inside the cell where water-solubility is beneficial.
  • a further example of a prodrug might be a short peptide (polyaminoacid) bonded to an acid group where the peptide is metabolized to reveal the active moiety.
  • Compound 1a is a non-limiting example of a prodrug (in this case a prodrug of Compound 1).
  • Conventional procedures for the selection and preparation of suitable prodrug derivatives are described, for example, in Design of Prodrugs , (ed. H. Bundgaard, Elsevier, 1985), which is hereby incorporated herein by reference for the purpose of describing procedures and preparation of suitable prodrug derivatives.
  • an effective amount is used to indicate an amount of an active compound, or pharmaceutical agent, that elicits the biological or medicinal response indicated.
  • an effective amount of compound can be the amount needed to prevent, alleviate or ameliorate symptoms of disease or prolong the survival of the subject being treated This response may occur in a tissue, system, animal or human and includes alleviation of the symptoms of the disease being treated. Determination of an effective amount is well within the capability of those skilled in the art, especially in light of the detailed disclosure provided herein.
  • the effective amount of the compounds disclosed herein required as a dose will depend on the route of administration, the type of animal, including human, being treated, and the physical characteristics of the specific animal under consideration.
  • an effective amount of the compositions described herein, and optionally one or more additional antiviral agents is an amount that is effective to reduce viral load or achieve a sustained viral response to therapy.
  • treatment refers to obtaining a desired pharmacologic and/or physiologic effect.
  • the effect may be prophylactic in terms of completely or partially preventing a disease or symptom thereof and/or may be therapeutic in terms of a partial or complete cure for a disease and/or adverse affect attributable to the disease.
  • Treatment covers any treatment of a disease in a mammal, particularly in a human, and includes: (a) preventing the disease from occurring in a subject which may be predisposed to the disease but has not yet been diagnosed as having it; (b) inhibiting the disease, i.e., arresting its development; and (c) relieving the disease, i.e., causing regression of the disease.
  • the terms “individual,” “host,” “subject,” and “patient” are used interchangeably herein, and refer to a mammal, including, but not limited to, murines, simians, humans, mammalian farm animals, mammalian sport animals, and mammalian pets.
  • hepatic fibrosis refers to the growth of scar tissue in the liver that can occur in the context of a chronic hepatitis infection.
  • liver function refers to a normal function of the liver, including, but not limited to, a synthetic function, including, but not limited to, synthesis of proteins such as serum proteins (e.g., albumin, clotting factors, alkaline phosphatase, aminotransferases (e.g., alanine transaminase, aspartate transaminase), 5′-nucleosidase, ⁇ -glutaminyltranspeptidase, etc.), synthesis of bilirubin, synthesis of cholesterol, and synthesis of bile acids; a liver metabolic function, including, but not limited to, carbohydrate metabolism, amino acid and ammonia metabolism, hormone metabolism, and lipid metabolism; detoxification of exogenous drugs; a hemodynamic function, including splanchnic and portal hemodynamics; and the like.
  • serum proteins e.g., albumin, clotting factors, alkaline phosphatase, aminotransferases (e.g., alanine trans
  • sustained viral response refers to the response of an individual to a treatment regimen for HCV infection, in terms of serum HCV titer.
  • a “sustained viral response” refers to no detectable HCV RNA (e.g., less than about 500, less than about 200, or less than about 100 genome copies per milliliter serum) found in the patient's serum for a period of at least about one month, at least about two months, at least about three months, at least about four months, at least about five months, and/or at least about six months following cessation of treatment.
  • Compound 1 ⁇ -D-2′-deoxy-2′-fluoro-2′-C-methylcytidine
  • Compound 1 has been demonstrated to be effective in inhibiting HCV replication.
  • this invention is not limited by any particular theory, it is believed that Compound 1 inhibits HCV replication by inhibiting the HCV RNA polymerase, an enzyme involved in the replication of the hepatitis C virus.
  • Compound 1 can be obtained using methods known to those skilled in the art, such as those methods described in U.S. Pat. No. 7,419,572, which is hereby incorporated by reference in its entirety.
  • Pharmaceutically acceptable salts and prodrugs of Compound 1 can be utilized in the compositions described herein.
  • the diisobutyl ester prodrug of ⁇ -D-2′-deoxy-2′-fluoro-2′-C-methylcytidine shown in FIG. 1 , has been shown to have increased permeability that led to increased plasma exposure, and thereby improved anti-viral efficacy.
  • Compound 2 The compound, (1S,4R,6S,14S,18R)-4-Fluoro-1,3-dihydro-isoindole-2-carboxylic acid 14-tert-butoxycarbonylamino-4-cyclopropanesulfonylaminocarbonyl-2,15-dioxo-3,16-diaza-tricyclo[14.3.0.04,6]nonadec-7-en-18-yl ester (hereinafter “Compound 2”) has shown to be effective in inhibiting HCV replication.
  • the aforementioned compound can be obtained using methods known to those skilled in the art, including, for example, those methods disclosed in U.S. Pat. No. 7,491,794, which is hereby incorporated by reference in its entirety.
  • Compound 2 is believed to inhibit the HCV protease, in particular the NS3/4A protease.
  • Pharmaceutically acceptable salts and prodrugs of Compound 2 can be utilized in the compositions described herein.
  • the sodium salt of Compound 2 can be included in compositions described herein. The structure and methods for producing the sodium salt are described in U.S. Publication No. 2007-0054842, filed on Jul. 21, 2006, which is hereby incorporated by reference in its entirety.
  • each stereogenic carbon can be of R or S configuration.
  • the specific compounds exemplified in this application can be depicted in a particular configuration, compounds having either the opposite stereochemistry at any given chiral center or mixtures thereof are also envisioned unless otherwise specified.
  • chiral centers are found in the salts or prodrugs of the compounds, it is to be understood that the compounds encompasses all possible stereoisomers unless otherwise indicated.
  • each double bond may independently be E or Z a mixture thereof.
  • all tautomeric forms are also intended to be included.
  • compositions that can include Compound 1, or a pharmaceutically acceptable salt or prodrug thereof; and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the prodrug of Compound 1 can be Compound 1a.
  • the salt of Compound 2 can be the sodium salt.
  • An embodiment described herein relates to a composition consisting essentially of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof; and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the prodrug of Compound 1 can be Compound 1a.
  • the salt of Compound 2 can be the sodium salt.
  • the composition can further include a pharmaceutically acceptable excipient, diluent and/or carrier, such as those described herein.
  • compositions described herein can include an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 9000 mg to about 50 mg. In other embodiments, the composition can include an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 5000 mg to about 150 mg. In still other embodiments, the composition can include an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 2000 mg to about 300 mg.
  • the composition can include an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 1000 mg to about 450 mg. In an embodiment, the composition can include an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 1000 mg to about 500 mg.
  • compositions can include an amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 2000 mg to about 2 mg. In other embodiments, the composition can include an amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 1600 mg to about 25 mg. In still other embodiments, the composition can include an amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 500 mg to about 50 mg. In an embodiment, the composition can include an amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 200 mg to about 100 mg.
  • a potential advantage of utilizing a combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may be a reduction in the required amounts of one or more compounds that are effective in treating a disease condition disclosed herein (for example, HCV), as compared to monotherapy treatment of an otherwise comparable patient population using either Compound 1 or 2, or pharmaceutically acceptable salts or prodrugs thereof, alone.
  • the amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, in the composition can be less compared to the amount of Compound 1 or a pharmaceutically acceptable salt or prodrug thereof, needed to achieve the same viral load reduction when administered as a monotherapy.
  • the amount of Compound 2 or a pharmaceutically acceptable salt or prodrug thereof, in the composition can be less compared to the amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, needed to achieve the same viral load reduction when administered as a monotherapy.
  • the sum of the amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and the amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof is less than expected or predicted based on the additive combination of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, alone and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, alone for treating the disease condition such as HCV.
  • Additional advantages of utilizing a combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may include little to no cross resistance between Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof; different routes for elimination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof; little to no overlapping toxicities between Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof; little to no significant effects on cytochrome P450; and/or little to no pharmacokinetic interactions between Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof.
  • the percentages of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof, present in the composition can also vary.
  • the composition can include an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 1% to about 99% (weight/weight) based on the sum of the amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and the amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the composition.
  • Additional embodiments include, but are not limited to, an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 5% to about 90%, about 10% to about 80%, about 20% to about 70%, about 30% to about 60% and about 40% to about 50% (weight/weight) based on the sum of the amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and the amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the composition.
  • the composition can include an amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 1% to about 99% (weight/weight) based on the sum of the amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and the amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the composition.
  • Examples of additional embodiments include, but are not limited to, an amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the range of about 5% to about 90%, about 10% to about 80%, about 20% to about 70%, about 30% to about 60% and about 40% to about 50% (weight/weight) based on the sum of the amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and the amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, in the composition.
  • Additional therapeutic agents can also be included in a composition that includes Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof.
  • the additional therapeutic agent can be an anti-viral agent.
  • the anti-viral agent can be a HCV anti-viral agent.
  • IFN interferon
  • PEG polyethyleneglycol
  • Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof further can include an interferon receptor agonist, such as a Type I interferon agonist and/or a Type II interferon agonist.
  • the Type II interferon agonist can be interferon- ⁇ (IFN- ⁇ ).
  • the Type 1 interferon agonist can be interferon- ⁇ (IFN- ⁇ ), for example, monoPEG (30 kD, linear)-ylate consensus, INFERGEN consensus IFN- ⁇ , a 40 kD branched mono-methoxy PEG conjugate of interferon ⁇ -2b and/or a 12 kD mono-methoxy PEG conjugate of interferon ⁇ -2b.
  • IFN- ⁇ interferon- ⁇
  • ribavirin can be also included in a composition that includes Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof.
  • a composition that includes Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof does not include an interferon agonist.
  • the interferon agonist can be a Type I interferon agonist.
  • the Type I interferon agonist is a pegylated Type I interferon agonist such as those described herein.
  • a composition that includes Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof, does not include ribavirin.
  • interferon receptor agonist refers to any Type I interferon receptor agonist, Type II interferon receptor agonist, or Type III interferon receptor agonist.
  • a Type I interferon receptor agonist refers to any naturally occurring or non-naturally occurring ligand of human Type I interferon receptor, which binds to and causes signal transduction via the receptor.
  • Type I interferon receptor agonists include interferons, including naturally-occurring interferons, modified interferons, synthetic interferons, pegylated interferons, fusion proteins comprising an interferon and a heterologous protein, shuffled interferons; antibody specific for an interferon receptor; non-peptide chemical agonists; and the like.
  • Type II interferon receptor agonist refers to any naturally occurring or non-naturally occurring ligand of human Type II interferon receptor that binds to and causes signal transduction via the receptor.
  • Type II interferon receptor agonists include native human interferon- ⁇ , recombinant IFN- ⁇ species, glycosylated IFN- ⁇ species, pegylated IFN- ⁇ species, modified or variant IFN- ⁇ species, IFN- ⁇ fusion proteins, antibody agonists specific for the receptor, non-peptide agonists, and the like.
  • a Type III interferon receptor agonist refers to any naturally occurring or non-naturally occurring ligand of humanIL-28 receptor ⁇ (“IL-28R”), the amino acid sequence of which is described by Sheppard, et al., infra., that binds to and causes signal transduction via the receptor.
  • Suitable ⁇ -glucosidase inhibitors include any of the above-described imino-sugars, including long-alkyl chain derivatives of imino sugars as disclosed in U.S. Patent Publication No. 2004/0110795; inhibitors of endoplasmic reticulum-associated ⁇ -glucosidases; inhibitors of membrane bound ⁇ -glucosidase; miglitol (Glyset®), and active derivatives, and analogs thereof; and acarbose (Precose®), and active derivatives, and analogs thereof.
  • compositions described herein can be administered to a human patient per se, or in compositions where they are mixed with other active ingredients, as in combination therapy, or carriers, diluents, excipients or combinations thereof, and may be formulated into preparations in solid, semi-solid, liquid or gaseous forms, such as tablets, capsules, powders, granules, ointments, solutions, suppositories, injections, inhalants and aerosols. Proper formulation is dependent upon the route of administration chosen. Techniques for formulation and administration of the compositions described herein are known to those skilled in the art. Pharmaceutically acceptable excipients are known to those skilled in the art, and are described in a variety of publications, including, for example, A.
  • compositions disclosed herein may be manufactured in a manner that is itself known, e.g., by means of conventional mixing, dissolving, granulating, dragee-making, levigating, emulsifying, encapsulating, entrapping or tableting processes. Additionally, the active ingredients are contained in an amount effective to achieve its intended purpose. Many of the compounds used in the compositions disclosed herein may be provided as salts with pharmaceutically compatible counterions.
  • the compounds, or pharmaceutically acceptable salts or prodrugs thereof are formulated in an aqueous buffer.
  • Suitable aqueous buffers include, but are not limited to, acetate, succinate, citrate, and phosphate buffers varying in strengths from about 5 mM to about 100 mM.
  • the aqueous buffer includes reagents that provide for an isotonic solution. Such reagents include, but are not limited to, sodium chloride; and sugars e.g., mannitol, dextrose, sucrose, and the like.
  • the aqueous buffer further includes a non-ionic surfactant such as polysorbate 20 or 80.
  • the formulations may further include a preservative. Suitable preservatives include, but are not limited to, a benzyl alcohol, phenol, chlorobutanol, benzalkonium chloride, and the like. In many cases, the formulation is stored at about 4° C. Formulations may also be lyophilized, in which case they generally include cryoprotectants such as sucrose, trehalose, lactose, maltose, mannitol, and the like. Lyophilized formulations can be stored over extended periods of time, even at ambient temperatures.
  • Suitable routes of administration may, for example, include oral, rectal, topical transmucosal, or intestinal administration; parenteral delivery, including intramuscular, subcutaneous, intravenous, intramedullary injections, as well as intrathecal, direct intraventricular, intraperitoneal, intranasal, intraocular injections or as an aerosol inhalant.
  • parenteral delivery including intramuscular, subcutaneous, intravenous, intramedullary injections, as well as intrathecal, direct intraventricular, intraperitoneal, intranasal, intraocular injections or as an aerosol inhalant.
  • parenteral delivery including intramuscular, subcutaneous, intravenous, intramedullary injections, as well as intrathecal, direct intraventricular, intraperitoneal, intranasal, intraocular injections or as an aerosol inhalant.
  • parenteral delivery including intramuscular, subcutaneous, intravenous, intramedullary injections, as well as intrathecal, direct intraventricular, intraperitone
  • Subcutaneous administration can be accomplished using standard methods and devices, e.g., needle and syringe, a subcutaneous injection port delivery system, and the like. See, e.g., U.S. Pat. Nos. 3,547,119; 4,755,173; 4,531,937; 4,311,137; and 6,017,328.
  • a combination of a subcutaneous injection port and a device for administration of a pharmaceutical composition of the embodiments to a patient through the port is referred to herein as “a subcutaneous injection port delivery system.”
  • subcutaneous administration is achieved by bolus delivery by needle and syringe.
  • the compounds can be used alone or in combination with appropriate additives to make tablets, powders, granules or capsules, for example, with conventional additives, such as lactose, mannitol, corn starch or potato starch; with binders, such as crystalline cellulose, cellulose derivatives, acacia, corn starch or gelatins; with disintegrators, such as corn starch, potato starch or sodium carboxymethylcellulose; with lubricants, such as talc or magnesium stearate; and if desired, with diluents, buffering agents, moistening agents, preservatives and flavoring agents.
  • conventional additives such as lactose, mannitol, corn starch or potato starch
  • binders such as crystalline cellulose, cellulose derivatives, acacia, corn starch or gelatins
  • disintegrators such as corn starch, potato starch or sodium carboxymethylcellulose
  • lubricants such as talc or magnesium stearate
  • the compounds can be formulated into preparations for injection by dissolving, suspending or emulsifying them in an aqueous or nonaqueous solvent, such as vegetable or other similar oils, synthetic aliphatic acid glycerides, esters of higher aliphatic acids or propylene glycol; and if desired, with conventional additives such as solubilizers, isotonic agents, suspending agents, emulsifying agents, stabilizers and preservatives.
  • the compounds can be made into suppositories by mixing with a variety of bases such as emulsifying bases or water-soluble bases.
  • bases such as emulsifying bases or water-soluble bases.
  • the compounds of the embodiments can be administered rectally via a suppository.
  • the suppository can include vehicles such as cocoa butter, carbowaxes and polyethylene glycols, which melt at body temperature, yet are solidified at room temperature.
  • Unit dosage forms for oral or rectal administration such as syrups, elixirs, and suspensions may be provided wherein each dosage unit, for example, teaspoonful, tablespoonful, tablet or suppository, contains a predetermined amount of the composition containing one or more inhibitors.
  • unit dosage forms for injection or intravenous administration may comprise the inhibitor(s) in a composition as a solution in sterile water, normal saline or another pharmaceutically acceptable carrier.
  • unit dosage form refers to physically discrete units suitable as unitary dosages for human and animal subjects, each unit containing a predetermined quantity of compounds of the embodiments calculated in an amount sufficient to produce the desired effect in association with a pharmaceutically acceptable diluent, carrier or vehicle.
  • the specifications for the novel unit dosage forms of the embodiments depend on the particular compound employed and the effect to be achieved, and the pharmacodynamics associated with each compound in the host.
  • compositions described herein can be administered orally, parenterally or via an implanted reservoir.
  • the composition can be orally administered or administered by injection.
  • compositions may also administer the composition in a local rather than systemic manner, for example, via injection of the composition directly into the infected area, often in a depot or sustained release formulation.
  • composition in a targeted drug delivery system, for example, in a liposome coated with a tissue-specific antibody.
  • the liposomes will be targeted to and taken up selectively by the organ.
  • compositions may, if desired, be presented in a pack or dispenser device which may contain one or more unit dosage forms containing the active ingredient.
  • the pack may for example comprise metal or plastic foil, such as a blister pack.
  • the pack or dispenser device may be accompanied by instructions for administration.
  • the pack or dispenser may also be accompanied with a notice associated with the container in form prescribed by a governmental agency regulating the manufacture, use, or sale of pharmaceuticals, which notice is reflective of approval by the agency of the form of the drug for human or veterinary administration. Such notice, for example, may be the labeling approved by the U.S. Food and Drug Administration for prescription drugs, or the approved product insert.
  • Compositions comprising a compound disclosed herein formulated in a compatible pharmaceutical carrier may also be prepared, placed in an appropriate container, and labeled for treatment of an indicated condition.
  • Some embodiments described herein relate to a method for ameliorating or treating a disease condition that can include administering an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and an amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, wherein the disease condition can be a hepatitis C virus infection, liver fibrosis, and/or impaired liver function.
  • the prodrug of Compound 1 can be Compound 1a.
  • compositions described herein can be present in the same dosage form such as the compositions described herein.
  • Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof can be administered as separate dosage forms.
  • Compound 1, or a pharmaceutically acceptable salt or prodrug thereof can be administered in one tablet and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, can be administered in a second tablet.
  • the dosage forms can be the same (e.g., as both pills) or different (e.g., one compound can be formulated in a pill and the other compound can be formulated as an injectable).
  • Administration of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof can vary.
  • the dosage forms can be administered simultaneously or sequentially.
  • the dosage form that contains Compound 1, or a pharmaceutically acceptable salt or prodrug thereof can be administered before the dosage form that contains Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the dosage form that contains Compound 1, or a pharmaceutically acceptable salt or prodrug thereof can be administered after the dosage form that contains Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the dosage form that contains Compound 1, or a pharmaceutically acceptable salt or prodrug thereof can be administered at approximately the same time as the dosage form that contains Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof can be administered concurrently.
  • the term “concurrently” means effective concentrations of both compounds are present in a subject.
  • Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof can be administered in the same dosage form or separate dosage forms.
  • Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof can be administered sequentially.
  • the term “sequentially” means administering one compound for a first time period and then administering a second compound for a second time period in which the first and second time periods do not overlap.
  • Additional therapeutic agents can also be administered to the subject having the disease condition.
  • additional therapeutic agents includes those previously described herein.
  • the additional agent(s) can be administered in the same dosage form as Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and/or Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the additional therapeutic agent(s) can be included in a composition that includes Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, without Compound 2, or a pharmaceutically acceptable salt or prodrug thereof; or a composition that includes Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, without Compound 1, or a pharmaceutically acceptable salt or prodrug thereof; or a composition described herein (for example, a composition that includes Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof).
  • the additional therapeutic agent(s) can be administered in one or more separate dosage forms.
  • each dosage form with one or more additional therapeutic agents can be the same as the dosage form containing Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and/or the dosage form containing Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, or different from the dosage form containing Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and/or the dosage form containing Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the dosage forms with one or more additional therapeutic agents can be administered before, after, in-between, concurrently or sequentially with Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and/or Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the additional therapeutic agent can be an interferon receptor agonist, for example, a Type I interferon receptor agonist and/or a Type II interferon receptor agonist.
  • the Type II interferon agonist can be interferon- ⁇ (IFN- ⁇ ).
  • the Type 1 interferon agonist can be interferon- ⁇ (IFN- ⁇ ).
  • the Type I interferon agonist can be selected from monoPEG (30 kD, linear)-ylate consensus, INFERGEN consensus IFN- ⁇ , a 40 kD branched mono-methoxy PEG conjugate of interferon ⁇ -2b and a 12 kD mono-methoxy PEG conjugate of interferon ⁇ -2b.
  • the additional therapeutic agent can be ribavirin.
  • Compounds 1 and 2 can be administered without administering one or more additional therapeutic agents such as an interferon receptor agonist and/or ribavirin.
  • the interferon receptor agonist can be a Type 1 interferon receptor agonist, such as a pegylated Type 1 interferon receptor agonist.
  • One or more additional therapeutic agents can be administered after administration of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • one or more additional therapeutic agents can be administered after completion of a treatment regimen with Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the additional therapeutic agent can be an interferon receptor agonist such as a Type I interferon receptor agonist.
  • the Type I interferon receptor agonist can be a pegylated Type I interferon receptor agonist.
  • the additional therapeutic agent can be ribavirin.
  • Whether a subject method is effective in treating an HCV infection can be determined in various ways, for example, by a reduction in viral load, a reduction in time to seroconversion (virus undetectable in patient serum), an increase in the rate of sustained viral response to therapy, a reduction of morbidity or mortality in clinical outcomes, or other indicator of disease response.
  • whether a subject method is effective in treating an HCV infection can be determined by measuring viral load, or by measuring a parameter associated with HCV infection, including, but not limited to, liver fibrosis, elevations in serum transaminase levels, and necroinflammatory activity in the liver.
  • administration and/or use of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof, in combination can reduce the viral load more than the viral load reduction achieved by administration of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, alone at substantially the same amount.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may reduce the viral load by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, or at least about 90%, or more, as compared to the reduction of HCV viral load achieved by substantially the same amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, administered as a monotherapy.
  • administration and/or use of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof, in combination can reduce the viral load more than the viral load reduction achieved by the administration of substantially the same amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, alone.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may reduce the viral load by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, or at least about 90%, or more, as compared to the reduction of HCV viral load achieved by substantially the same amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, administered as a monotherapy.
  • an amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and an amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof is a synergistic amount.
  • a “synergistic combination” or a “synergistic amount” is a combined dosage that is more effective in the therapeutic or prophylactic treatment of an HCV infection than the incremental improvement in treatment outcome that could be predicted or expected from a merely additive combination of (i) the therapeutic or prophylactic benefit of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, when administered at that same dosage as a monotherapy and (ii) the therapeutic or prophylactic benefit of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, when administered at the same dosage as a monotherapy.
  • the term “synergistic combination” or a “synergistic amount” may also be used to refer to a combined dosage that is more effective in the therapeutic or prophylactic treatment of an HCV infection than could be predicted or expected, based on the rule of mixtures, from a combination of (i) the therapeutic or prophylactic benefit of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and (ii) the therapeutic or prophylactic benefit of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may reduce the viral load by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, or at least about 90%, or more, as compared to the reduction in HCV viral load predicted or expected from the rule of mixtures or additive combination of the viral load reductions from administration of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the foregoing levels of viral load reduction are averages based on a population of subjects.
  • HCV viral load and viral load reduction can be determined by methods known in the art.
  • HCV viral load may be determined by measuring HCV RNA levels using a suitable assay such as a reverse transcriptase PCR assay.
  • the assay is the COBAS® AmpilPrep/COBAS® Taqman® HCV Test RUO.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may shorten the time period it takes a subject to achieve a sustained viral response to therapy.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may shorten the time period it takes a subject to achieve a sustained viral response to therapy compared to the time period it takes the subject to achieve a sustained viral response being administered substantially the same amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, as a monotherapy.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may shorten the time period it takes a subject to achieve a sustained viral response to therapy compared to the time period it takes the subject to achieve a sustained viral response to therapy being administered substantially the same amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, as a monotherapy.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may shorten the time period it takes a subject to achieve a sustained viral response to therapy by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, or at least about 90%, or more, as compared to that expected based on the rule of mixtures or additive combination expected or predicted from the time period it takes the subject to achieve a sustained viral response to therapy being administered substantially the same amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, as monotherapy and the time period it takes the subject to achieve a sustained viral response to therapy being administered substantially the same amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, as monotherapy.
  • the time periods for achieving a sustained viral response are averages based on a population of subjects.
  • liver fibrosis As noted above, whether a subject method is effective in treating an HCV infection can be determined by measuring a parameter associated with HCV infection, such as liver fibrosis. Methods of determining the extent of liver fibrosis are known to those skilled in the art. In some embodiments, the level of a serum marker of liver fibrosis indicates the degree of liver fibrosis.
  • ALT serum alanine aminotransferase
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof reduces a serum level of a marker of liver fibrosis by at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%, or more, compared to the level of the marker in a subject undergoing monotherapy (such as being administered substantially the same amount of Compound 1 or 2, or a pharmaceutically acceptable salt or prodrug thereof, alone).
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof reduces a serum level of a marker of liver fibrosis by at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%, or more, as compared to that expected based on the rule of mixtures or the additive combination of the levels of reduction of a serum level of a marker of liver fibrosis using substantially the same amounts of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof.
  • the reduction of serum levels of a marker of liver fibrosis are averages based on a population of subjects.
  • a subject being treated for a disease condition can experience resistance to one or more of the therapeutic agents (for example, Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and/or Compound 2, or a pharmaceutically acceptable salt or prodrug thereof).
  • the term “resistance” as used herein refers to a subject displaying a delayed, lessened and/or absent response to the therapeutic agent(s).
  • the viral load of a subject with HCV who has become resistant to an anti-viral or combination thereof may be reduced to a lesser degree compared to the amount in viral load reduction exhibited by the subject before becoming resistant to the anti-viral or combination thereof and/or the determined normal mean viral load reduction.
  • the level of resistance of the disease condition to therapy can be decreased compared to the level of resistance measured in a subject being administered substantially the same amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, as a monotherapy. In some embodiments, the level of resistance of the disease condition to therapy can be decreased compared to the level of resistance measured in a subject being administered substantially the same amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, as a monotherapy.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof reduces the level of resistance of the disease condition to therapy by at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%, or more, as compared to that expected based on the rule of mixtures or additive combination of the levels of resistance using substantially the same amounts of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof.
  • the levels of resistance are averages based on a population of subjects.
  • viral load rebound refers to a sustained ⁇ 0.5 log IU/ml increase of viral load above nadir before the end of treatment, where nadir is a ⁇ 0.5 log IU/ml decrease from baseline.
  • co-administration of Compound 1, or pharmaceutically acceptable salts or prodrugs thereof, and Compound 2, or pharmaceutically acceptable salts or prodrugs thereof results in less subjects experiencing a viral load rebound as compared to monotherapy with Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, or Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the co-administration of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof results in at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%, or more, reduction in number of subjects experiencing a viral load rebound as compared to monotherapy, for example monotherapy with Compound 1, or pharmaceutically acceptable salts or prodrugs thereof, and Compound 2, or pharmaceutically acceptable salts or prodrugs thereof.
  • the co-administration of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof results in less than about 75%, less than about 50%, less than about 40%, less than about 30%, less than about 20%, less than about 10%, or less than about 5% of the patient population who experiences a viral load rebound.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof reduces the percentage of the patient population who experiences a viral load rebound by at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%, or more, as compared to that expected based on the rule of mixtures.
  • non-responder refers to a viral load decrease ⁇ 0.5 log IU/ml during treatment.
  • co-administration of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof results in less subjects who are non-responders as compared to monotherapy of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, or Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the co-administration of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof results in at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%, or more, reduction in number of patients who are non-responders as compared to monotherapy.
  • the co-administration of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof results in less than about 75%, less than about 50%, less than about 40%, less than about 30%, less than about 20%, less than about 10%, or less than about 5% of the patient population who are non-responders.
  • the combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof reduces the percentage of the patient population who are non-responders by at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%, or more, as compared to that expected based on the rule of mixtures.
  • the onset of resistance of the disease condition to therapy can be delayed compared to when the onset of resistance occurs in a subject being administered substantially the same amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, as a monotherapy. In some embodiments, the onset of resistance of the disease condition to therapy can be delayed compared to when the onset of resistance occurs in a subject being administered substantially the same amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, as a monotherapy. In an embodiment, Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, can delay the onset of resistance to Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • Compound 1, or a pharmaceutically acceptable salt or prodrug thereof can delay the onset of HCV resistance to Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, as indicated by an HCV replicon assay.
  • onset of resistance is the point in time when the subject shows resistance to one or more therapeutic compounds.
  • the disease can be HCV.
  • the combination of Compounds 1 and 2, or of pharmaceutically acceptable salts or prodrugs thereof may be a synergistic combination in that the onset of resistance may be delayed by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, or at least about 90%, or more, as compared to when the onset of resistance is predicted or expected based on the rule of mixtures or the additive combination of substantially the same amounts of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof.
  • the time of the onset of resistance is an average based on a population of subjects.
  • one or more side effects are experienced by subjects being treated with therapeutic agents such as anti-viral compounds.
  • the side effects may be to such a degree that treatment with the agent may not be feasible or recommended such that treatment is not an option for some subjects or treatment has to be stopped.
  • subject compliance with the treatment may be increased.
  • the number of side effects associated with co-administration of Compound 1, or a pharmaceutically salt or prodrug thereof; and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof can be less than the number of side effects exhibited by the subject being administered substantially the same amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, as the only active agent.
  • the number of side effects associated with co-administration of Compound 1, or a pharmaceutically salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof can be less than the number of side effects exhibited by the subject being administered substantially the same amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, as the only active agent.
  • the subject being administered a combination of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof may exhibit less side effects than predicted or expected based on the rule of mixtures or the additive combination of side effects experienced by a subject being administered substantially the same amounts of Compounds 1 and 2, or pharmaceutically acceptable salts or prodrugs thereof, by at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%.
  • the number of side effects is an average based on a population of subjects.
  • compliance by subjects to the anti-viral treatment may also be increased by decreasing the severity of one or more side effects that is associated with monotherapy with the active compounds.
  • the severity of a side effect associated with the combination of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof is decreased compared to the severity of the side effect experienced by the subject being administered Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, as a monotherapy.
  • the severity of a side effect associated with the combination of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof is decreased compared to the severity of the side effect experienced by the subject being administered Compound 2, or a pharmaceutically acceptable salt or prodrug thereof, as a monotherapy.
  • the severity of a side effect associated with the combination of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and Compound 2, or a pharmaceutically acceptable salt or prodrug thereof may be decreased by at least about 10%, at least about 20%, at least about 25%, at least about 30%, at least about 35%, at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, or at least about 80%, as compared to the severity of the side effect predicted or expected based on the rule of mixtures or the additive combination of the severities of the side effect associated with substantially the same amount of Compound 1, or a pharmaceutically acceptable salt or prodrug thereof, and substantially the same amount of Compound 2, or a pharmaceutically acceptable salt or prodrug thereof.
  • the severity of a side effect is an average based on a population of subjects.
  • the useful in vivo dosage to be administered and the particular mode of administration will vary depending upon the age, weight, the severity of the affliction, and mammalian species treated, the particular compounds employed, and the specific use for which these compounds are employed. (See e.g., Fingl et al. 1975, in “The Pharmacological Basis of Therapeutics”, which is hereby incorporated herein by reference in its entirety, with particular reference to Ch. 1, p. 1).
  • the determination of effective dosage levels that is the dosage levels necessary to achieve the desired result, can be accomplished by one skilled in the art using routine pharmacological methods. Typically, human clinical applications of products are commenced at lower dosage levels, with dosage level being increased until the desired effect is achieved.
  • acceptable in vitro studies can be used to establish useful doses and routes of administration of the compositions identified by the present methods using established pharmacological methods.
  • the dosage may be a single one or a series of two or more given in the course of one or more days, as is needed by the subject.
  • the compounds will be administered for a period of continuous therapy, for example for a week or more, or for months or years.
  • human dosages for compounds have been established for at least some condition, those same dosages, or dosages that are between about 0.1% and 500%, more preferably between about 25% and 250% of the established human dosage will be used.
  • a suitable human dosage can be inferred from ED 50 or ID 50 values, or other appropriate values derived from in vitro or in vivo studies, as qualified by toxicity studies and efficacy studies in animals.
  • dosages may be calculated as the free base.
  • dosages may be calculated as the free base.
  • Dosage amount and interval may be adjusted individually to provide plasma levels of the active moiety which are sufficient to maintain the modulating effects, or minimal effective concentration (MEC).
  • MEC minimal effective concentration
  • the MEC will vary for each compound but can be estimated from in vitro data. Dosages necessary to achieve the MEC will depend on individual characteristics and route of administration. However, HPLC assays or bioassays can be used to determine plasma concentrations.
  • Dosage intervals can also be determined using MEC value.
  • Compositions should be administered using a regimen which maintains plasma levels above the MEC for 10-90% of the time, preferably between 30-90% and most preferably between 50-90%.
  • the effective local concentration of the drug may not be related to plasma concentration.
  • the attending physician would know how to and when to terminate, interrupt, or adjust administration due to toxicity or organ dysfunctions. Conversely, the attending physician would also know to adjust treatment to higher levels if the clinical response was not adequate (precluding toxicity).
  • the magnitude of an administrated dose in the management of the disorder of interest will vary with the severity of the condition to be treated and the route of administration. The severity of the condition may, for example, be evaluated, in part, by standard prognostic evaluation methods. Further, the dose and perhaps dose frequency will also vary according to the age, body weight, and response of the individual patient. A program comparable to that discussed above may be used in veterinary medicine.
  • dosage levels In non-human animal studies, applications of potential products are commenced at higher dosage levels, with dosage being decreased until the desired effect is no longer achieved or adverse side effects disappear.
  • the dosage may range broadly, depending upon the desired effects and the therapeutic indication. Alternatively dosages may be based and calculated upon the surface area of the patient, as understood by those of skill in the art.
  • the toxicology of a particular compound, or of a subset of the compounds, sharing certain chemical moieties may be established by determining in vitro toxicity towards a cell line, such as a mammalian, and preferably human, cell line. The results of such studies are often predictive of toxicity in animals, such as mammals, or more specifically, humans.
  • a cell line such as a mammalian, and preferably human, cell line.
  • the results of such studies are often predictive of toxicity in animals, such as mammals, or more specifically, humans.
  • the toxicity of particular compounds in an animal model such as mice, rats, rabbits, or monkeys, may be determined using known methods.
  • the efficacy of a particular compound may be established using several recognized methods, such as in vitro methods, animal models, or human clinical trials.
  • acceptable animal models may be used to establish efficacy of chemicals to treat such conditions.
  • the skilled artisan can be guided by the state of the art to choose an appropriate model, dose, and route of administration, and regime.
  • human clinical trials can also be used to determine the efficacy of a compound or composition in humans.
  • compositions and methods described herein can be administered to individuals who have been diagnosed with an HCV infection. Any of the compositions and methods described herein can be administered to individuals who have failed previous treatment for HCV infection (“treatment failure patients,” including non-responders and relapsers).
  • Individuals who have been clinically diagnosed as infected with HCV are of particular interest in many embodiments.
  • Individuals who are infected with HCV are identified as having HCV RNA in their blood, and/or having anti-HCV antibody in their serum.
  • Such individuals include anti-HCV ELISA-positive individuals, and individuals with a positive recombinant immunoblot assay (RIBA).
  • RIBA positive recombinant immunoblot assay
  • Individuals who are clinically diagnosed as infected with HCV include na ⁇ ve individuals (e.g., individuals not previously treated for HCV, particularly those who have not previously received IFN- ⁇ -based and/or ribavirin-based therapy) and individuals who have failed prior treatment for HCV (“treatment failure” patients).
  • Treatment failure patients include non-responders (i.e., individuals in whom the HCV titer was not significantly or sufficiently reduced by a previous treatment for HCV, e.g., a previous IFN- ⁇ monotherapy, a previous IFN- ⁇ and ribavirin combination therapy, or a previous pegylated IFN- ⁇ and ribavirin combination therapy); and relapsers (i.e., individuals who were previously treated for HCV, e.g., who received a previous IFN- ⁇ monotherapy, a previous IFN- ⁇ and ribavirin combination therapy, or a previous pegylated IFN- ⁇ and ribavirin combination therapy, whose HCV titer decreased, and subsequently increased).
  • non-responders i.e., individuals in whom the HCV titer was not significantly or sufficiently reduced by a previous treatment for HCV, e.g., a previous IFN- ⁇ monotherapy, a previous IFN- ⁇ and ribavirin combination therapy,
  • HCV-positive individuals have an HCV titer of at least about 10 5 , at least about 5 ⁇ 10 5 , or at least about 10 6 , or at least about 2 ⁇ 10 6 , genome copies of HCV per milliliter of serum.
  • the patient may be infected with any HCV genotype (genotype 1, including 1a and 1b, 2, 3, 4, 6, etc. and subtypes (e.g., 2a, 2b, 3a, etc.)), particularly a difficult to treat genotype such as HCV genotype 1 and particular HCV subtypes and quasispecies.
  • the HCV-positive individuals are those who exhibit severe fibrosis or early cirrhosis (non-decompensated, Child's-Pugh class A or less), or more advanced cirrhosis (decompensated, Child's-Pugh class B or C) due to chronic HCV infection and who are viremic despite prior anti-viral treatment with IFN- ⁇ -based therapies or who cannot tolerate IFN- ⁇ -based therapies, or who have a contraindication to such therapies.
  • HCV-positive individuals with stage 3 or 4 liver fibrosis according to the METAVIR scoring system are suitable for treatment with the compositions and methods described herein.
  • individuals suitable for treatment with the compositions and methods described herein are patients with decompensated cirrhosis with clinical manifestations, including patients with far-advanced liver cirrhosis, including those awaiting liver transplantation.
  • individuals suitable for treatment with the compositions and methods described herein include patients with milder degrees of fibrosis including those with early fibrosis (stages 1 and 2 in the METAVIR, Ludwig, and Scheuer scoring systems; or stages 1, 2, or 3 in the Ishak scoring system).
  • a randomized, double-blind, placebo controlled, dose ranging study of Compound 1a and Compound 2 in adult patients with chronic hepatitis C genotype 1 was conducted. Approximately 54 treatment na ⁇ ve males and females between 18 and 65 years of age (inclusive) with genotype 1 HCV infection who had not previously been treated with an interferon or investigational HCV therapeutic agent were enrolled. Approximately an additional 20 treatment patients who had failed treatment with the current standard of care (null, partial responders and relapsers) were enrolled. Subjects had a liver biopsy or non-invasive (e.g., Fibroscan) procedure within 24 calendar months of first dose consistent with chronic hepatitis C without cirrhosis.
  • non-invasive e.g., Fibroscan
  • Liver biopsies within 5 years demonstrating F0 or F1 disease were also acceptable. Subjects with liver cirrhosis or incomplete/transition to cirrhosis, or other forms of liver disease, anemia, HIV or HBV infection, hepatocellular carcinoma, cardiac disease or renal disease were excluded from this particular protocol, as well as pregnant or lactating women, women of childbearing potential, and male partners of women who are pregnant or lactating.
  • Women of non-child bearing potential is defined as postmenopausal (not had a spontaneous menstrual period for at least 1 year and confirmation by FSH and LH laboratory results); surgical sterile (status post hysterectomy or tubal ligation for at least 6 months); and/or, natural sterile (amenorrheic for at least 1 year).
  • Groups I, II, III, IV, V, VI and VII are shown in Table 1 below and pictorially in FIGS. 2 and 3 .
  • Group I included two arms with 8 subjects in Arm 1 and 8 subjects in Arm 2.
  • Compound 1a was administered for the full 7 days and Compound 2 was administered for the last half of the seven days.
  • Arm 2 Compound 2 was administered the full seven days and Compound 1a was administered the last half of the seven days.
  • Group II a total of 10 subjects were enrolled. The subjects were either receiving Compounds 1a and 2, or placebos for the full fourteen days.
  • Group I and Group II were completed sequentially.
  • Groups III and IV subjects received Compounds 1a and 2, or placebos for the full fourteen days.
  • Group III enrolled 18 subjects which were administered either 500 mg (Compound 1a) and 200 mg (Compound 2), 1000 mg (Compound 1a) and 100 mg (Compound 2), or placebos of Compounds 1a and 2.
  • Group IV enrolled 12 subjects. 8 subjects in Group IV took 1000 mg (Compound 1a) and 200 mg (Compound 2), and 4 subjects took placebos. Groups III and IV were completed sequentially after the safety data for Groups I and II was obtained.
  • Groups V, VI and VII subjects received Compounds 1a and 2 or placebos for the full fourteen days.
  • Group VII enrolled 10 subjects. Eight subjects in Group VII took 1000 mg (Compound 1a) and 900 mg (Compound 2), and 2 subjects in Group VII took placebos of Compounds 1a and 2.
  • Plasma concentrations of Compound 1 (and, if applicable, its metabolites) and Compound 2 were measured by validated liquid chromatography/tandem mass spectrometry (LC-MS/MS) methods.
  • the pharmacokinetic parameters for each compound were estimated using standard non-compartmental methods using WinNonlin (Version 5.2, Pharsight Co.) using standard methods.
  • Predose samples were taken within 1 hour of dosing. Approximately 10 mL of blood was used for both the HCV RNA viral load determination and the viral resistance assessment.
  • the HCV RNA levels were determined by COBAS® AmpilPrep/COBAS® Taqman® HCV Test RUO. This is a real-time PCR method.
  • HCV and RNA measurements were taken at designated time points. Mean and individual plots of viral load data (absolute and change from baseline) were provided from each arm in each group. A listing of individual change from baseline was determined. Summaries of HCV RNA measurements at each nominal time point are provided by treatment arm.
  • Selected blood samples collected for viral load determinations were utilized for phenotypic and sequence analyses to monitor for development of resistance to Compound 1 and Compound 2 in subjects, who experience either viral load rebound or non-response while on treatment with Compound 1 and/or Compound 2.
  • Table 2 provides the viral kinetic results for Group I, Arms 1 and 2, and monotherapy treatment with Compound 1a or Compound 2 after 7 days of treatment. The results show the mean log change from baseline of HCV RNA polymerase (IU/mL).
  • Tables 3 and 4 provide the virological results for Groups I-VII.
  • Serum ALT activity was measured using a standard routine blood work test(s). The baseline value was obtained prior to the first dose. Values outside the normal ranges and marked abnormalities were flagged according to the standard definitions of Roche. The values and changes from baseline were plotted by individual subjects to aid with data evaluation. A transformation of the data was performed. The mean change from baseline of serum ALT for Group II is shown in FIG. 4 . As shown in FIG. 4 , the combination of Compounds 1a and 2 reduces serum ALT activity.
  • Table 5 Provided in Table 5 are the safety and tolerability results for the combination treatment using Compounds 1a and 2, with and without pegylated interferon and/or ribavirin. As shown by the results in Table 5, the combination treatment of Compounds 1a and 2 is safe and well tolerated.

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