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
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/496—Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
• • 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
  • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
  • A61K31/445—Non condensed piperidines, e.g. piperocaine
  • A61K31/4523—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems
  • A61K31/454—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. pimozide, domperidone
• • 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
  • A61K31/715—Polysaccharides, i.e. having more than five saccharide radicals attached to each other by glycosidic linkages; Derivatives thereof, e.g. ethers, esters
  • A61K31/716—Glucans
  • A61K31/724—Cyclodextrins
• • 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
• • 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
  • A61P37/00—Drugs for immunological or allergic disorders
  • A61P37/02—Immunomodulators
• • 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
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
  • A61P7/06—Antianaemics

Definitions

• This invention relates to methods of treating, preventing and/or managing myelodysplastic and related syndromes which comprise the administration of immunomodulatory compounds alone or in combination with known therapeutics.
• the invention also relates to pharmaceutical compositions and dosing regimens.
• the invention encompasses the use of immunomodulatory compounds in conjunction with transplantation therapy and/or other standard therapies for myelodysplastic syndromes.
• MDS Myelodysplastic syndrome
• the initial hematopoietic stem cell injury can be from causes such as, but not limited to, cytotoxic chemotherapy, radiation, virus, chemical exposure, and genetic predisposition.
• a clonal mutation predominates over bone marrow, suppressing healthy stem cells.
• programmed cell death apoptosis
• gene mutation rarely occurs and a proliferation of leukemic cells overwhelms the healthy marrow.
• the disease course differs, with some cases behaving as an indolent disease and others behaving aggressively with a very short clinical course that converts into an acute form of leukemia.
• the actual incidence of MDS in the U.S. is unknown.
• MDS was first considered a distinct disease in 1976, and occurrence was estimated at 1500 new cases every year. At that time, only patients with less than five percent blasts were considered to have this disorder.
• Statistics from 1999 estimated 13,000 new cases per year and about 1000 cases per year in children, surpassing chronic lymphocytic leukemia as the most common form of leukemia in the western hemisphere. The perception that the incidence is increasing may be due to improvements in recognition and criteria for diagnosis. The disease is found worldwide.
• An international group of hematologists, the French- American-British (FAB) Cooperative Group classified MDS disorders into five subgroups, differentiating them from acute myeloid leukemia.
• the Merck Manual 954 (17 th ed.
• refractory anemia characterized by five percent or less myeloblasts in bone marrow: (1) refractory anemia (RA) and; (2) RA with ringed sideroblasts (RARS), defined morphologically as having 15% erythroid cells with abnormal ringed sideroblasts, reflecting an abnormal iron accumulation in the mitochondria. Both have a prolonged clinical course and low incidence of progression to acute leukemia. Besa B.C., Med. Clin. North Am. 1992 May, 76(3): 599-617.
• RA with excess blasts RAEB
• RAEB-T RAEB in transformation
• WHO World Health Organization
• CMML chronic myelomonocytic leukemia
• CML chronic myelocytic leukemia
• MPD myeloproliferative disorder
• CMML is limited to monocytosis, less than 13,000/mm 3 total leukocytes, and requires trilineage dysplasia. Id. Harris N.L., et al, J. Clin. Oncol. 1999 Dec, 17(12): 3835-49. Finally, some other international organizations, including WHO, have suggested a sixth class of MDS patients, characterized by a del (5q) abnormality.
• MDS is primarily a disease of elderly people, with the median onset in the seventh decade of life.
• the median age of these patients is 65 years, with ages ranging from the early third decade of life to as old as 80 years or older.
• the syndrome may occur in any age group, including the pediatric population.
• Patients who survive malignancy treatment with alkylating agents, with or without radiotherapy, have a high incidence of developing MDS or secondary acute leukemia. About 60-70% of patients do not have an obvious exposure or cause for MDS, and are classified as primary MDS patients.
• MDS MDS-derived neuropeptides
• Primary MDS describes development of MDS or acute leukemia after known exposures to chemotherapy drugs that can cause bone marrow damage. These drugs are associated with a high incidence of chromosomal abnormalities following exposure and at the time of MDS or acute leukemia diagnosis. Further, MDS is associated with complications associated with severe cytopenias.
• myelofibrosis which can accelerate decline in blood counts and increase transfusion requirements. Transformation to acute leukemia accelerates the development of complications such as anemia, bleeding, and infections.
• IP SS International Prognosis Scoring System
• MDS The current treatment of MDS is based on the stage and the mechanism of the disease that predominates the particular phase of the disease process.
• Bone marrow transplantation has been used in patients with poor prognosis or late-stage MDS. Epstein and Slease, 1985, Surg. Ann. 17:125. This type of therapy, however, is both painful for donor and recipient, because of the involvement of invasive procedures and can cause severe and even fatal complications to the recipient, particularly with allogeneic transplant and related Graft Versus Host Disease (GVHD) results. Therefore, the risk of GVHD restricts the use of bone marrow transplantation to patients with otherwise fatal diseases. Further, as most patients are elderly and only a few young MDS patients will have a matched donor, the use of bone marrow transplantation is limited.
• GVHD Graft Versus Host Disease
• hematopoietic growth factors or cytokines to stimulate blood cell development in a recipient.
• the process of blood cell formation, by which a small number of self-renewing stem cells give rise to lineage specific progenitor cells that subsequently undergo proliferation and differentiation to produce the mature circulating blood cells has been shown to be at least in part regulated by specific hormones. These hormones are collectively known as hematopoietic growth factors.
• EPO erythropoietin
• GM-CSF granulocyte macrophage colony stimulating factor
• G-CSF granulocyte colony stimulating factor
• cytokines have also been shown to activate a number of functions of mature blood cells, including influencing the migration of mature hematopoietic cells.
• Schrader et al 1981, Proc. Natl. Acad. Sci. U.S.A. 78:323; Moore et al, 1980, J. Immunol. 125:1302; Kurland et al, 1979, Proc. Natl. Acad. Sci. U.S.A. 76:2326; Handman and Burgess, 1979, J. Immunol.
• Thalidomide is a racemic compound sold under the tradename Thalomid® and chemically named ⁇ -(N-phthalimido)glutarimide or 2-(2,6-dioxo-3-piperidinyl)-lH- isoindole-l,3(2H)-dione. Thalidomide was originally developed in the 1950's to treat morning sickness, but due to its teratogenic effects was withdrawn from use. Thalidomide has been approved in the United States for the acute treatment of the cutaneous manifestations of erythema nodosum leprosum in leprosy. Physicians' Desk Reference, 1154-1158 (56th ed., 2002).
• Thalidomide has reportedly been studied in the treatment of other diseases, such as chronic graft- vs-host disease, rheumatoid arthritis, sarcoidosis, several inflammatory skin diseases, and inflammatory bowel disease.
• thalidomide was found to exert immunomodulatory and anti- inflammatory effects in a variety of disease states, cachexia in ADDS, and opportunic infections in AIDS, hi studies to define the physiological targets of thalidomide, the drug was found to have a wide variety of biological activities exclusive of its sedative effect including neurotoxicity, teratogenicity, suppression of TNF- ⁇ production by monocytes/macrophages and the accompanying inflammatory toxicities associated with high levels of TNF- ⁇ , and inhibition of angiogenesis and neovascularization.
• thalidomide is in the treatment of cancer.
• the compound has been investigated in the treatment of various types of cancer, such as refractory multiple myeloma, brain, breast, colon, and prostate cancer, melanoma, mesothelioma, and renal cell carcinoma.
• cancer such as refractory multiple myeloma, brain, breast, colon, and prostate cancer, melanoma, mesothelioma, and renal cell carcinoma.
• Singhal S., et al, New England J. Med. 341(21):1565-1571 (1999); and Marx, G.M., et al., Proc. Am. Soc. Clin. Oncology 18:454a (1999).
• Thalidomide reportedly can also be used to prevent the development of chronic cardiomyopathy in rats caused by doxorubicin.
• Examples include, but are not limited to, the substituted 2-(2,6- dioxopiperidin-3-yl) phthalimies and substituted 2-(2,6-dioxopiperidin-3-yl)-l- oxoisoindoles described in United States Patent Nos. 6,281,230 and 6,316,471, both to G.W. Muller, et al
• a group of compounds selected for their capacity to potently inhibit TNF-OJ production by LPS stimulated PBMC has been investigated.
• IMiDsTM Immunomodulatory Drugs
• TNF- ⁇ TNF- ⁇ but also marked inhibition of LPS induced monocyte ILl ⁇ and IL12 production.
• LPS induced IL6 is also inhibited by IMiDsTM, albeit partially.
• IMiDsTM potent stimulators of LPS induced ILIO, increasing IL10 levels by 200 to 300%. Id.
• This invention encompasses methods of treating or preventing myelodysplastic syndrome ("MDS") which comprise administering to a patient in need thereof a therapeutically or prophylactically effective amount of an immunomodulatory compound of the invention or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• MDS myelodysplastic syndrome
• the invention also encompasses methods of managing MDS (e.g., lengthening the time of remission) which comprise administering to a patient in need of such management a therapeutically or prophylactically effective amount of an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• One embodiment of the invention encompasses the use of one or more immunomodulatory compounds in combination with conventional therapies presently used to treat, prevent or manage MDS such as hematopoietic growth factors, cytokines, cancer chemotherapeutics, stem cell transplantation and other transplantations.
• the invention further encompasses pharmaceutical compositions, single unit dosage forms, and kits suitable for use in treating, preventing and/or managing MDS, which comprise an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• MDS which comprise administering to a patient in need of such treatment or prevention a therapeutically or prophylactically effective amount of an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• the embodiment encompasses the treatment, prevention or management of specific sub-types of MDS such as refractory anemia, refractory anemia with ringed sideroblasts, refractory anemia with excess blasts, refractory anemia with excess blasts in transformation and chronic myelomonocytic leukemia.
• myelodysplastic syndromes or "MDS” means hematopoietic stem cell disorders characterized by one or more of the following: ineffective blood cell production, progressive cytopenias, risk of progression to acute leukemia or cellular marrow with impaired morphology and maturation (dysmyelopoiesis).
• MDS myelodysplastic syndromes
• myelodysplastic syndromes or “MDS” unless otherwise noted includes: refractory anemia, refractory anemia with ringed sideroblasts, refractory anemia with excess blasts, refractory anemia with excess blasts in transformation and chronic myelomonocytic leukemia.
• Another embodiment of the invention encompasses methods of managing MDS which comprises administering to a patient in need of such management a prophylactically effective amount of an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• Another embodiment of the invention encompasses a pharmaceutical composition comprising an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• a pharmaceutical composition comprising an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• single unit dosage forms comprising an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• kits comprising: a pharmaceutical composition comprising an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof and a second active or dexamethasone or instructions for use.
• a pharmaceutical composition comprising an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof and a second active or dexamethasone or instructions for use.
• the invention further encompasses kits comprising single unit dosage forms.
• One embodiment of the invention encompasses a method of treating, preventing and/or managing MDS, which comprises administering to a patient in need of such treatment, prevention and/or management a therapeutically or prophylactically effective amount of an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof, and a therapeutically or prophylactically effective amount of a second active agent.
• the second active agent is preferably a hematopoietic growth factor, a cytokine, an anti-cancer agent, an antibiotic, an anti-fungal, an anti-inflammatory, an immunosuppressive agent such as a cyclosporin, conventional therapy for MDS, or other chemotherapeutic agent found for example in the Physician's Desk Reference 2002.
• Preferred anti-cancer or cancer chemotherapeutics are apoptosis inducing agents, topoisomerase inhibitors, anti-angiogenesis compounds, microtubule stabilizing agents, alkylating agents and other known conventional cancer chemotherapy.
• Most preferred second active agents are those capable of affecting or improving blood production.
• Second active agents can be large molecules (e.g., proteins) or small molecules (e.g., synthetic inorganic, organometallic, or organic molecules).
• the examples of specific second active agent include, but are not limited to, etanercept (Enbrel®), imatinib (Glivec®), anti-TNF-o; antibodies, infliximab (Remicade®), G-CSF, GM-CSF, EPO, topotecan, irinotecan, pentoxifylline, ciprofloxacin, dexamethasone, IL2, IL8, IL18, Ara-C, vinorelbine, vinblastine, isotretinoin, andl3-cis-retinoic acid.
• This invention also encompasses the use of native, naturally occurring, and recombinant proteins.
• the invention further encompasses mutants and derivatives (e.g., modified forms) of naturally occurring proteins that exhibit, in vivo, at least some of the pharmacological activity of the proteins upon which they are based.
• mutants include, but are not limited to, proteins that have one or more amino acid residues that differ from the corresponding residues in the naturally occurring forms of the proteins.
• mutants include, but are not limited to, proteins that have one or more amino acid residues that differ from the corresponding residues in the naturally occurring forms of the proteins.
• mutants include, but are not limited to, proteins that have one or more amino acid residues that differ from the corresponding residues in the naturally occurring forms of the proteins.
• mutants include carbohydrate moieties normally present in their naturally occurring forms (e.g., nonglycosylated forms).
• derivatives include, but are not limited to, pegylated derivatives and fusion proteins, such as proteins formed by fusing IgGl or IgG3 to the protein or active portion of the protein of interest. See, e.g., Penichet, MX. and Morrison, S.L., J. Immunol. Methods 248:91-101 (2001). Vaccines that cause the secretion of proteins disclosed herein as well as pharmacologically active mutants, derivatives, and fusion thereof are also encompassed by the invention.
• certain immunomodulatory compounds and proteins can act in complementary or synergistic ways in the treatment or management of MDS. It is also believed that certain proteins may reduce or eliminate particular adverse effects associated with some immunomodulatory compounds, thereby allowing the administration of larger amounts of an immxmomodulatory compound to patients and/or increasing patient compliance. It is further believed that some immunomodulatory compounds may reduce or eliminate particular adverse effects associated with some protein-based MDS therapies, thereby allowing the administration of larger amounts of protein to patients and/or increasing patient compliance.
• Another embodiment of the invention encompasses a method of reversing, reducing or avoiding an adverse effect associated with the administration of a chemotherapeutics or therapeutics used to treat cancer or MDS in a patient suffering from MDS, which comprises administering to a patient in need thereof a therapeutically or prophylactically effective amount of an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• an immunomodulatory compound exhibits immunomodulatory activity that may provide additive or synergistic effects when given concurrently with transplantation therapy, hnmiinomodulatory compounds can work in combination with transplantation therapy reducing complications associated with the invasive procedure of transplantation and risk of related Graft Versus Host Disease (GVHD).
• GVHD Graft Versus Host Disease
• this invention encompasses a method of treating, preventing and/or managing MDS, which comprises administering to a patient (e.g., a human) an immunomodulatory compound, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof, before, during, or after transplantation therapy.
• a patient e.g., a human
• the invention also encompasses pharmaceutical compositions, single unit dosage forms, and kits which comprise one or more immunomodulatory compounds, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof, a second active ingredient, and/or blood or cells for transplantation therapy.
• the kit may contain one or more compounds of the invention, stem cells for transplantation and an immunosuppressive agent, antibiotic or other drug, each of which is to be used to treat the MDS patient.
• Compounds used in the invention include immunomodulatory compounds that are racemic, stereomerically enriched or stereomerically pure, and pharmaceutically acceptable salts, solvates, hydrates, stereoisomers, clathrates, and prodrugs thereof.
• Preferred compounds used in the invention are small organic molecules having a molecular weight less than about 1000 g/mol, and are not proteins, peptides, oligonucleotides, oligosaccharides or other macromolecules.
• the term "stereomerically pure” means a composition that comprises one stereoisomer of a compound and is substantially free of other stereoisomers of that compound.
• a stereomerically pure composition of a compound having one chiral center will be substantially free of the opposite enantiomer of the compound.
• a stereomerically pure composition of a compound having two chiral centers will be substantially free of other diastereomers of the compound.
• a typical stereomerically pure compound comprises greater than about 80% by weight of one stereoisomer of the compound and less than about 20% by weight of other stereoisomers of the compound, more preferably greater than about 90% by weight of one stereoisomer of the compound and less than about 10% by weight of the other stereoisomers of the compound, even more preferably greater than about 95 % by weight of one stereoisomer of the compound and less than about 5% by weight of the other stereoisomers of the compound, and most preferably greater than about 97% by weight of one stereoisomer of the compound and less than about 3% by weight of the other stereoisomers of the compound.
• stereomerically enriched means a composition that comprises greater than about 60% by weight of one stereoisomer of a compound, preferably greater than about 70% by weight, more preferably greater than about 80% by weight of one stereoisomer of a compound.
• enantiomerically pure means a stereomerically pure composition of a compound having one chiral center.
• stereomerically enriched means a stereomerically enriched composition of a compound having one chiral center.
• immunomodulatory compounds or “IMiDsTM” (Celgene Corporation) used herein encompasses small organic molecules that markedly inhibit TNF-o LPS induced monocyte ILl ⁇ and IL12, and partially inhibit IL6 production. Specific immunomodulatory compounds of the invention are discussed below.
• TNF- ⁇ is an inflammatory cytokine produced by macrophages and monocytes during acute inflammation. TNF- ⁇ is responsible for a diverse range of signaling events within cells. TNF- ⁇ may play a pathological role in cancer. Without being limited by particular theory, one of the biological effects exerted by the immunomodulatory compounds of the invention is the reduction of synthesis of TNF-c . Immunomodulatory compounds of the invention enhance the degradation of TNF- ⁇ mRNA.
• immunomodulatory compounds used in the invention may also be potent co-stimulators of T cells and increase cell proliferation dramatically in a dose dependent manner.
• Immunomodulatory compounds of the invention may also have a greater co-stimulatory effect on the CD8+ T cell subset than on the CD4+ T cell subset, hi addition, the compounds preferably have anti-inflammatory properties, and efficiently co-stimulate T cells.
• immunomodulatory compounds of the invention include, but are not limited to, cyano and carboxy derivatives of substituted styrenes such as those disclosed in U.S. patent no. 5,929,117; l-oxo-2-(2,6-dioxo-3-fluoropiperidin-3yl) isoindolines and l,3-dioxo-2-(2,6-dioxo-3-fluoropiperidine-3-yl) isoindolines such as those described in U.S. patent no. 5,874,448; the terra substituted 2-(2,6-dioxopiperdin-3-yl)-l- oxoisoindolines described in U.S. patent no.
• aminothalidomide as well as analogs, hydrolysis products, metabolites, derivatives and precursors of aminothalidomide, and substituted 2-(2,6-dioxopiperidin-3-yl) phthalimides and substituted 2-(2,6-dioxopiperidin- 3-yl)-l-oxoisoindoles such as those described in U.S. patent nos. 6,281,230 and 6,316,471; isoindole-imide compounds such as those described in U.S. patent application no. 09/972,487 filed on October 5, 2001, U.S.
• Immunomodulatory compounds of the invention do not include thalidomide.
• Other specific immunomodulatory compounds of the invention include, but are not limited to, 1-oxo-and 1,3 dioxo-2-(2,6-dioxopiperidin-3-yl) isoindolines substituted with amino in the benzo ring as described in U.S. Patent no. 5,635,517 which is incorporated herein.
• immunomodulatory compounds include, but are not limited to: 1 -oxo-2-(2,6-dioxopiperidin-3-yl)-4-aminoisoindoline;
• R 1 is hydrogen or methyl.
• the invention encompasses the use of enantiomerically pure forms (e.g. optically pure (R) or (S) enantiomers) of these compounds.
• R 1 is H, (Ci-Cs )alkyl, (C 3 -C 7 )cycloalkyl, (C 2 -C 8 )alkenyl, (C 2 -C 8 )alkynyl, benzyl, aryl, (C 0 -C 4 )alkyl-(Cj-C 6 )heterocycloalkyl, (C 0 -C 4 )alkyl-(C 2 -C 5 )heteroaryl, C(O)R 3 , C(S)R 3 , C(O)OR 4 , (C C 8 )alkyl-N(R 6 ) 2 , (C 1 -C 8 )alkyl-OR 5 , (C!-C 8 )alkyl-C(O)OR 5 , C(O)NHR 3 , C(S)NHR 3 , C(O)NR 3 R 3' , C(S)NR 3 R 3' or (C 1 -
• R 4 is (d-C 8 )alkyl, (C 2 -C 8 )alkenyl, (C 2 -C 8 )alkynyl, (C r C 4 )alkyl-OR 5 , benzyl, aryl, (CQ-C ⁇ alkyl ⁇ Ci-C ⁇ heterocycloalkyl, or (Co-C 4 )alkyl-(C 2 -C 5 )heteroaryl;
• R 5 is (C 1 -C 8 )alkyl, (C 2 -C 8 )alkenyl, (C 2 -C 8 )alkynyl, benzyl, aryl, or (C 2 - C 5 )heteroaryl; each occurrence of R 6 is independently H, (C 1 -C 8 )alkyl, (C 2 -C 8 )alkenyl, (C 2 - C 8 )alkynyl, benzyl, aryl, (C 2 -C 5 )heteroaryl, or (C 0 -C 8 )alkyl-C(O)O-R 5 or the R 6 groups can join to form a heterocycloalkyl group; n is O or 1; and * represents a chiral-carbon center.
• Rl is (C3-C7)cycloalkyl, (C2- C8)alkenyl, (C2-C8)alkynyl, benzyl, aryl, (C0-C4)alkyl-(C1-C6)heterocycloalkyl, (C0- C4)alkyl-(C2-C5)heteroaryl, C(O)R3, C(O)OR4, (Cl-C8)alkyl-N(R6)2, (Cl-C8)alkyl- OR5, (Cl-C8)alkyl-C(O)OR5, C(S)NHR3, or (Cl-C8)alkyl-O(CO)R5;
• R 2 is H or (d-C 8 )alkyl; and
• R 3 is (d-C 8 )alkyl, (C 3 -C 7 )cycloalkyl, (C 2 -C 8 )alkenyl, (C 2 -C 8 )alkynyl, benzyl, aryl, (C 0 -C 4 )alkyl-(C 1 -C 6 )heterocycloalkyl, (C 0 -C 4 )alkyl-(C 2 -C 5 )heteroaryl, (C 5 -C 8 )alkyl- N(R 6 ) 2 ; (C 0 -C 8 )alkyl-NH-C(O)O-R 5 ; (d-C 8 )alkyl-OR 5 , (d-C 8 )alkyl-C(O)OR 5 , (d- C 8 )alkyl-O(CO)R 5 , or C(O)OR 5 ; and the other variables have the same definitions.
• R 1 is (d-C 8 )alkyl or benzyl.
• R 1 is H, (C 1 -C 8 )alkyl, benzyl, CH 2 OCH 3 , CH 2 CH 2 OCH 3 , or
• R 1 is
• R 7 is independently H, (C 1 -C 8 )alkyl, benzyl, CH 2 OCH 3 , or CH 2 CH 2 OCH 3 .
• R is C(O)R .
• R is (Co-C 4 )alkyl-(C2-C5)heteroaryl, (Ci-
• heteroaryl is pyridyl, furyl, or thienyl.
• R 1 is C(O)OR 4 .
• the H of C(O)NHC(O) can be replaced with (d-C 4 )alkyl, aryl, or benzyl.
• Still other specific immunomodulatory compounds of the invention belong to a class of isoindole-imides disclosed in U.S. patent application no. 09/781,179, International Publication No. WO 98/54170, and United States Patent No. 6,395,754, each of which are incorporated herein by reference.
• each of R 1 , R 2 , R 3 , or R 4 independently of the others, is halo, alkyl of 1 to 4 carbon atoms, or alkoxy of 1 to 4 carbon atoms or (ii) one of R 1 , R 2 , R 3 , or R 4 is nitro or - NHR 5 and the remaining of R 1 , R 2 , R 3 , or R 4 are hydrogen;
• R 5 is hydrogen or alkyl of 1 to 8 carbons
• R 6 hydrogen, alkyl of 1 to 8 carbon atoms, benzo, chloro, or fluoro;
• R' is RXCHR 10 -N(R 8 R 9 );
• R 7 is m-phenylene or p-phenylene or -(C n H 2n )- in which n has a value of 0 to 4; each of R8 and R9 taken independently of the other is hydrogen or alkyl of 1 to 8 carbon atoms, or R8 and R9 taken together are tetramethylene, pentamethylene, hexamethylene, or -CH 2 CH 2 [X]X 1 CH 2 CH 2 - in which [X]X t is -O-, -S-, or -NH-; R 10 is hydrogen, alkyl of to 8 carbon atoms, or phenyl; and * represents a chiral-carbon center.
• the most preferred immunomodulatory compounds of the invention are 4-(amino)- 2-(2,6-dioxo(3-piperidyl))-isoindoline-l,3-dione and 3-(4-amino-l-oxo-l,3-dihydro- isoindol-2-yl)-piperidine-2,6-dione.
• the compounds can be obtained via standard, synthetic methods (see e.g., United States Patent No. 5,635,517, incorporated herein by reference). The compounds are available from Celgene Corporation, Warren, NJ.
• 4-(Amino)-2-(2,6- dioxo(3-piperidyl))-isoindoline-l,3-dione (ACTIMIDTM) has the following chemical structure:
• the compounds of the invention can either be commercially purchased or prepared according to the methods described in the patents or patent publications disclosed herein. Further, optically pure compounds can be asymmetrically synthesized or resolved using known resolving agents or chiral columns as well as other standard synthetic organic chemistry techniques.
• the term "pharmaceutically acceptable salt” encompasses non-toxic acid and base addition salts of the compound to which the term refers.
• Acceptable non-toxic acid addition salts include those derived from organic and inorganic acids or bases know in the art, which include, for example, hydrochloric acid, hydrobromic acid, phosphoric acid, sulfuric acid, methanesulphonic acid, acetic acid, tartaric acid, lactic acid, succinic acid, citric acid, malic acid, maleic acid, sorbic acid, aconitic acid, salicylic acid, phthalic acid, embolic acid, enanthic acid, and the like.
• bases that can be used to prepare pharmaceutically acceptable base addition salts of such acidic compounds are those that form non-toxic base addition salts, i.e., salts containing pharmacologically acceptable cations such as, but not limited to, alkali metal or alkaline earth metal salts and the calcium, magnesium, sodium or potassium salts in particular.
• Suitable organic bases include, but are not limited to, N,N-dibenzylethylenediamine, chloroprocaine, choline, diethanolamine, ethylenediamine, meglumaine (N-methylglucamine), lysine, and procaine.
• prodrug means a derivative of a compound that can hydrolyze, oxidize, or otherwise react under biological conditions (in vitro or in vivo) to provide the compound.
• prodrugs include, but are not limited to, derivatives of immunomodulatory compounds of the invention that comprise biohydrolyzable moieties such as biohydrolyzable amides, biohydrolyzable esters, biohydrolyzable carbamates, biohydrolyzable carbonates, biohydrolyzable ureides, and biohydrolyzable phosphate analogues.
• Other examples of prodrugs include derivatives of immunomodulatory compounds of the invention that comprise -NO, -NO 2 , -ONO, or
• Prodrugs can typically be prepared using well-known methods, such as those described in 1 Burger's Medicinal Chemistry and Drug Discovery, 172-178, 949-982 (Manfred E. Wolff ed., 5th ed. 1995), and Design of Prodrugs (H. Bundgaard ed., Elselvier, New York 1985).
• biohydrolyzable amide means an amide, ester, carbamate, carbonate, ureide, or phosphate, respectively, of a compound that either: 1) does not interfere with the biological activity of the compound but can confer upon that compound advantageous properties in vivo, such as uptake, duration of action, or onset of action; or 2) is biologically inactive but is converted in vivo to the biologically active compound.
• biohydrolyzable esters include, but are not limited to, lower alkyl esters, lower acyloxyalkyl esters (such as acetoxylmethyl, acetoxyethyl, aminocarbonyloxymethyl, pivaloyloxymethyl, and pivaloyloxyethyl esters), lactonyl esters (such as phthalidyl and thiophthalidyl esters), lower alkoxyacyloxyalkyl esters (such as methoxycarbonyloxymethyl, ethoxycarbonyloxyethyl and isopropoxycarbonyloxyethyl esters), alkoxyalkyl esters, choline esters, and acylamino alkyl esters (such as acetamidomethyl esters).
• lower alkyl esters such as acetoxylmethyl, acetoxyethyl, aminocarbonyloxymethyl, pivaloyloxymethyl, and pivaloyloxyethyl esters
• biohydrolyzable amides include, but are not limited to, lower alkyl amides, ⁇ -amino acid amides, alkoxyacyl amides, and alkylaminoalkylcarbonyl amides.
• biohydrolyzable carbamates include, but are not limited to, lower alkylamines, substituted ethylenediamines, aminoacids, hydroxyalkylamines, heterocyclic and heteroaromatic amines, and polyether amines.
• One or more second active ingredients can be used in the methods and compositions of the invention together with an immunomodulatory compound of the invention, h a preferred embodiment, the second active agents are capable of affecting or improving the process of blood cell production. Specific second active agents also stimulate the division and differentiation of committed erythroid progenitors in cells in vitro or in vivo.
• Second active agents can be large molecules (e.g., proteins) or small molecules (e.g., synthetic inorganic, organometallic, or organic molecules).
• the second active agents include but are not limited to hematopoietic growth factors, cytokines, anti-cancer agents, antibiotics, proteasome inhibitors, immunosuppressive agents and other therapeutics discussed herein.
• agents include, but are not limited to, G-CSF, GM-CSF, EPO, dexamethasone, topotecan, pentoxifylline, irinotecan, ciprofloxacin, vinorelbine, IL2, IL8, IL18, Ara-C, isotretinoin, 13-cis-retinoic acid, 12-O-tetradecanoylphorbol-13-acetate (TPA), 5-AZA2'-deoyxcytidine, 9-nitrocamp-tothecin, transretinoic acid, amifostine, amphotericin B and liposomal amphotericin B, anti-CD-20 monoclonal antibody, anti- thymocyle globulin (ATG), arsenic trioxide, azacytidine, bevacizumab, bismuth monoclonal antibody, bryostatin, busulfan, caspofungin acetate, celocoxib, clad
• an imnmnomodulatory compound of the invention is used in combination with pentoxifylline, ciprofloxacin, and/or dexamethasone.
• This invention also encompasses the use of native, naturally occurring, and recombinant proteins.
• the invention further encompasses mutants and derivatives (e.g., modified forms) of naturally occurring proteins that exhibit, in vivo, at least some of the pharmacological activity of the proteins upon which they are based. Examples of mutants include, but are not limited to, proteins that have one or more amino acid residues that differ from the corresponding residues in the naturally occurring forms of the proteins.
• mutants proteins that lack carbohydrate moieties normally present in their naturally occurring forms (e.g., nonglycosylated forms).
• derivatives include, but are not limited to, pegylated derivatives and fusion proteins, such as proteins formed by fusing IgGl or IgG3 to the protein or active portion of the protein of interest. See, e.g., Penichet, M.L. and Morrison, S.L., J Immunol. Methods 248:91-101 (2001).
• Recombinant and mutated forms of G-CSF can be prepared as described in U.S. patent nos. 4,810,643; 4,999,291; 5,528,823; and 5,580,755; all of which are incorporated herein by reference.
• Recombinant and mutated forms of GM-CSF can be prepared as described in U.S. patent nos. 5,391,485; 5,393,870; and 5,229,496; all of which are incorporated herein by reference.
• recombinant forms of G-CSF and GM-CSF are currently sold in the United States for the treatment of symptoms associated with specific chemotherapies.
• NEUPOGEN® A recombinant form of G-CSF known as filgrastim is sold in the United States under the trade name NEUPOGEN®.
• NEUPOGEN® is known to stimulate division and maturation of granulocytes, mostly neutrophils, in MDS patients and to enhance erythroid response in combination with EPO. Physicians ' Desk Reference, 587-592 (56 th ed., 2002).
• a recombinant form of GM-CSF known as sargramostim is also sold in the United States under the trade name LEUK ⁇ NE®. LEUKINE® is known to stimulate division and maturation of earlier myeloid and macrophage precursor cells and has been reported to increase granulocytes.
• EPOGEN® epoetin alfa
• EPOGEN® is used to stimulate red cell production by stimulating division and maturation of committed red cell precursor cells.
• EPOGEN® has been reported to be effective in 20-26% of MDS patient when administered by itself and in as many as 48% of patients when combined with G-CSF or GM-CSF. Physicians ' Desk Reference, 582-587 (56 th ed., 2002).
• a growth-factor or cytokine such as G-CSF, GM-CSF and EPO can also be administered in the form of a vaccine.
• cytokines such as G-CSF and GM-CSF
• vaccines that secrete, or cause the secretion of, cytokines such as G-CSF and GM-CSF can be used in the methods, pharmaceutical compositions, and kits of the invention. See, e.g., Emens, L.A., et al, Curr. Opinion Mol. Tlier. 3(l):77-84 (2001).
• Methods of this invention encompass methods of preventing, treating and/or managing various types of MDS.
• preventing includes but is not limited to, inhibition or the averting of symptoms associated with MDS.
• the symptoms associated with MDS include, but are not limited to, anemia, thrombocytopenia, neutropenia, cytopenia, bicytopenia (two deficient cell lines), and pancytopenia (three deficient cell lines).
• treating refers to the administration of a composition after the onset of symptoms of MDS, whereas “preventing” refers to the administration prior to the onset of symptoms, particularly to patients at risk of MDS.
• the term “managing” encompasses preventing the recurrence of MDS in a patient who had suffered from MDS, lengthening the time a patient who had suffered from MDS remains in remission, and/or preventing the occurrence of MDS in patients at risk of suffering from MDS.
• the invention encompasses methods of treating or preventing patients with primary and secondary MDS. It further encompasses methods treating patients who have been previously treated for MDS, as well as those who have not previously been treated for MDS. Because patients with MDS have heterogenous clinical manifestations and varying clinical outcomes, it has become apparent that staging the patients according to their prognosis and approaching therapy depending on the severity and stage is necessary.
• the methods and compositions of this invention can be used in various stages of treatments for patients with one or more types of MDS including, but not limited to, refractory anemia (RA), RA with ringed sideroblasts (RARS), RA with excess blasts (RAEB), RAEB in transformation (RAEB-T), or chronic myelomonocytic leukemia (CMML).
• RA refractory anemia
• RARS ringed sideroblasts
• RAEB RA with excess blasts
• RAEB-T RAEB in transformation
• CMML chronic myelomonocytic leukemia
• the invention also contemplates treating patients diagnosed using the JJPSS for MDS discussed above. Greenberg et al, Blood 1997 (89):2079-88.
• Methods encompassed by this invention comprise administering an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof to a patient (e.g., a human) suffering, or likely to suffer, from MDS.
• a patient e.g., a human
• Specific patient populations include the elderly, i.e., ages 60 and above as well as those over 35 years of age. Patients with familial history of MDS or leukemia are also preferred candidates for preventive regimens.
• an immunomodulatory compound of the invention is administered orally and in a single or divided daily doses in an amount of from about 0.10 to about 150 mg/day.
• 4-(amino)-2-(2,6-dioxo(3- piperidyl))-isoindoline-l,3-dione is administered in an amount of from about 0.1 to about 1 mg per day, or alternatively about 5 mg every other day.
• 3-(4-amino-l-oxo- l,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione (RevimidTM) can be preferably administered in an amount of from about 5 to 25 mg per day, or alternatively from about 25 to about 50 mg every other day.
• Particular methods of the invention comprise comprises administering 1) an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof, and 2) a second active agent or active ingredient.
• an immunomodulatory compound of the invention or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof
• a second active agent or active ingredient examples of immimomodulatory compounds of the invention are disclosed herein (see, e.g., section 4.1); and examples of the second active agents are also disclosed herein (see, e.g., section 4.2).
• Administration of the immunomodulatory compounds and the second active agents to a patient can occur simultaneously or sequentially by the same or different routes of administration.
• the suitability of a particular route of administration employed for a particular active agent will depend on the active agent itself (e.g., whether it can be administered orally without decomposing prior to entering the blood stream) and the disease being treated.
• a preferred route of administration for an immunomodulatory compound is oral.
• Preferred routes of administration for the second active agents or ingredients of the invention are known to those of ordinary skill in the art. See, e.g. , Physicians ' Desk Reference, 1755-1760 (56 th ed., 2002).
• the second active agent is administered intravenously or subcutaneously and once or twice daily in an amount of from about 1 to about 1000 mg, from about 5 to about 500 mg, from about 10 to about 350 mg, or from about 50 to about 200 mg.
• the specific amount of the second active agent will depend on the specific agent used, the type of MDS being treated or managed, the severity and stage of MDS, and the amount(s) of immunomodulatory compounds of the invention and any optional additional active agents concurrently administered to the patient.
• the second active agent is GM-CSF, G-CSF, EPO, transretinoic acid, dexamethasone, topotecan, pentoxifylline, ciprofloxacin, dexamethasone, IL2, IL8, IL18, Ara-C, vinorelbine, or a combination thereof.
• GM-CSF is administered in an amount of from about 60 to about 500 mcg/m 2 intravenously over 2 hours, or from about 5 to about 12 mcg/m /day subcutaneously.
• G-CSF is administered subcutaneously in an amount of about 1 mcg/kg/day initially and can be adjusted depending on rise of total granulocyte counts.
• the maintenance dose is 300 (in smaller patients) or 480 meg subcutaneously.
• EPO is administered subcutaneously in an amount of 10,000 Unit 3 times per week.
• this invention encompasses a method of treating, preventing and/or managing MDS, which comprises administering the immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof, in conjunction with transplantation therapy.
• the treatment of MDS is based on the stages and mechanism of the disease. As inevitable leukemic transformation develops in certain stages of MDS, transplantation of peripheral blood stem cells, hematopoietic stem cell preparation or bone marrow may be necessary.
• the combined use of the immunomodulatory compound of the invention and transplantation therapy provides a unique and unexpected synergism.
• an immunomodulatory compound of the invention exhibits immunomodulatory activity that may provide additive or synergistic effects when given concurrently with transplantation therapy in patients with MDS.
• An immunomodulatory compound of the invention can work in combination with transplantation therapy reducing complications associated with the invasive procedure of transplantation and risk of related Graft Versus Host Disease (GVHD).
• GVHD Graft Versus Host Disease
• This invention encompasses a method of treating, preventing and/or managing MDS which comprises administering to a patient (e.g., a human) an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof, before, during, or after the transplantation of umbilical cord blood, placental blood, peripheral blood stem cell, hematopoietic stem cell preparation or bone marrow.
• a patient e.g., a human
• an immunomodulatory compound of the invention or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof
• a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof before, during, or after the transplantation of umbilical cord blood, placental blood, peripheral blood stem cell, hematopoietic stem cell preparation or bone marrow.
• the prophylactic or therapeutic agents of the invention are cyclically administered to a patient. Cycling therapy involves the administration of a first agent for a period of time, followed by the administration of the agent and/or the second agent for a period of time and repeating this sequential administration. Cycling therapy can reduce the development of resistance to one or more of the therapies, avoid or reduce the side effects of one of the therapies, and/or improves the efficacy of the treatment.
• prophylactic or therapeutic agents are administered in a cycle of about 16 weeks, about once or twice every day.
• One cycle can comprise the administration of a therapeutic or prophylactic agent and at least one (1) or three (3) weeks of rest.
• the number of cycles administered is from about 1 to about 12 cycles, more typically from about 2 to about 10 cycles, and more typically from about 2 to about 8 cycles.
• compositions can be used in the preparation of individual, single unit dosage forms.
• Pharmaceutical compositions and dosage forms of the invention comprise an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof.
• Pharmaceutical compositions and dosage forms of the invention can further comprise one or more excipients.
• compositions and dosage forms of the invention can also comprise one or more additional active ingredients. Consequently, pharmaceutical compositions and dosage forms of the invention comprise the active ingredients disclosed herein (e.g., an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof, and a second active ingredient). Examples of optional additional active ingredients are disclosed herein (see, e.g., section 4.2).
• Single unit dosage forms of the invention are suitable for oral, mucosal (e.g., nasal, sublingual, vaginal, buccal, or rectal), or parenteral (e.g., subcutaneous, intravenous, bolus injection, intramuscular, or intraarterial), transdermal or transcutaneous administration to a patent.
• mucosal e.g., nasal, sublingual, vaginal, buccal, or rectal
• parenteral e.g., subcutaneous, intravenous, bolus injection, intramuscular, or intraarterial
• transdermal or transcutaneous administration to a patent.
• dosage forms include, but are not limited to: tablets; caplets; capsules, such as soft elastic gelatin capsules; cachets; troches; lozenges; dispersions; suppositories; powders; aerosols (e.g., nasal sprays or inhalers); gels; liquid dosage forms suitable for oral or mucosal administration to a patient, including suspensions (e.g., aqueous or non-aqueous liquid suspensions, oil-in-water emulsions, or a water-in-oil liquid emulsions), solutions, and elixirs; liquid dosage forms suitable for parenteral administration to a patient; and sterile solids (e.g., crystalline or amorphous solids) that can be reconstituted to provide liquid dosage forms suitable for parenteral administration to a patient.
• suspensions e.g., aqueous or non-aqueous liquid suspensions, oil-in-water emulsions, or a water-in-oil liquid e
• compositions, shape, and type of dosage forms of the invention will typically vary depending on their use.
• a dosage form used in the acute treatment of a disease may contain larger amounts of one or more of the active ingredients it comprises than a dosage form used in the chronic treatment of the same disease.
• a parenteral dosage form may contain smaller amounts of one or more of the active ingredients it comprises than an oral dosage form used to treat the same disease.
• Suitable excipients are well known to those skilled in the art of pharmacy, and non-limiting examples of suitable excipients are provided herein. Whether a particular excipient is suitable for incorporation into a pharmaceutical composition or dosage form depends on a variety of factors well known in the art including, but not limited to, the way in which the dosage form will be administered to a patient. For example, oral dosage forms such as tablets may contain excipients not suited for use in parenteral dosage forms. The suitability of a particular excipient may also depend on the specific active ingredients in the dosage form. For example, the decomposition of some active ingredients may be accelerated by some excipients such as lactose, or when exposed to water.
• lactose-free means that the amount of lactose present, if any, is insufficient to substantially increase the degradation rate of an active ingredient.
• Lactose-free compositions of the invention can comprise excipients that are well known in the art and are listed, for example, in the U.S. Pharmacopeia (USP) 25-NF20 (2002).
• lactose-free compositions comprise active ingredients, a binder/filler, and a lubricant in pharmaceutically compatible and pharmaceutically acceptable amounts.
• Preferred lactose-free dosage forms comprise active ingredients, microcrystalline cellulose, pre-gelatinized starch, and magnesium stearate.
• This invention further encompasses anhydrous pharmaceutical compositions and dosage forms comprising active ingredients, since water can facilitate the degradation of some compounds.
• water e.g., 5%
• water is widely accepted in the pharmaceutical arts as a means of simulating long-term storage in order to determine characteristics such as shelf-life or the stability of formulations over time. See, e.g., Jens T. Carstensen, Drug Stability: Principles & Practice, 2d. Ed., Marcel Dekker, NY, NY, 1995, pp. 379-80.
• water and heat accelerate the decomposition of some compounds.
• the effect of water on a formulation can be of great significance since moisture and/or humidity are commonly encountered during manufacture, handling, packaging, storage, shipment, and use of formulations.
• Anhydrous pharmaceutical compositions and dosage forms of the invention can be prepared using anhydrous or low moisture containing ingredients and low moisture or low humidity conditions.
• Pharmaceutical compositions and dosage forms that comprise lactose and at least one active ingredient that comprises a primary or secondary amine are preferably anhydrous if substantial contact with moisture and/or humidity during manufacturing, packaging, and/or storage is expected.
• anhydrous pharmaceutical composition should be prepared and stored such that its anhydrous nature is maintained. Accordingly, anhydrous compositions are preferably packaged using materials known to prevent exposure to water such that they can be included in suitable formulary kits. Examples of suitable packaging include, but are not limited to, hermetically sealed foils, plastics, unit dose containers (e.g., vials), blister packs, and strip packs.
• suitable packaging include, but are not limited to, hermetically sealed foils, plastics, unit dose containers (e.g., vials), blister packs, and strip packs.
• suitable packaging include, but are not limited to, hermetically sealed foils, plastics, unit dose containers (e.g., vials), blister packs, and strip packs.
• suitable packaging include, but are not limited to, hermetically sealed foils, plastics, unit dose containers (e.g., vials), blister packs, and strip packs.
• the invention further encompasses pharmaceutical compositions and dosage forms that comprise one or more compounds that reduce the rate by which an active ingredient will decompose
• the amounts and specific types of active ingredients in a dosage form may differ depending on factors such as, but not limited to, the route by which it is to be administered to patients.
• typical dosage forms of the invention comprise an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof in an amount of from about 0.10 to about 150 mg.
• Typical dosage forms comprise an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt, solvate, hydrate, stereoisomer, clathrate, or prodrug thereof in an amount of about 0.1, 1, 2, 5, 7.5, 10, 12.5, 15, 17.5, 20, 25, 50, 100, 150 or 200 mg.
• a preferred dosage form comprises 4-(amino)-2-(2,6-dioxo(3-piperidyl))-isoindoline-l,3- dione (ActimidTM) in an amount of about 1, 2, 5, 10, 25 or 50mg.
• ActimidTM 4-(amino)-2-(2,6-dioxo(3-piperidyl))-isoindoline-l,3- dione
• ActimidTM 4-(amino)-2-(2,6-dioxo(3-piperidyl))-isoindoline-l,3- dione
• ActimidTM 4-(amino)-2-(2,6-dioxo(3-piperidyl))-isoindoline-l,3- dione
• ActimidTM 4-(amino)-2-(2,6-dioxo(3-piperidyl))-isoindoline-l,3- dione
• Typical dosage forms comprise the second active ingredient in an amount of 1 to about 1000 mg, from about 5 to about 500 mg, from about 10 to about 350 mg, or from about 50 to about 200 mg.
• the specific amount of the second active ingredient will depend on the specific agent used, the type of MDS being treated or managed, and the amount(s) of immunomodulatory compounds of the invention, and any optional additional active agents concurrently administered to the patient.
• compositions of the invention that are suitable for oral administration can be presented as discrete dosage forms, such as, but are not limited to, tablets (e.g., chewable tablets), caplets, capsules, and liquids (e.g., flavored syrups).
• dosage forms contain predetermined amounts of active ingredients, and may be prepared by methods of pharmacy well known to those skilled in the art. See generally, Remington 's Pharmaceutical Sciences, 18th ed., Mack Publishing, Easton PA (1990).
• Typical oral dosage forms of the invention are prepared by combining the active ingredients in an intimate admixture with at least one excipient according to conventional pharmaceutical compounding techniques.
• Excipients can take a wide variety of forms depending on the form of preparation desired for administration.
• excipients suitable for use in oral liquid or aerosol dosage forms include, but are not limited to, water, glycols, oils, alcohols, flavoring agents, preservatives, and coloring agents.
• excipients suitable for use in solid oral dosage forms include, but are not limited to, starches, sugars, micro-crystalline cellulose, diluents, granulating agents, lubricants, binders, and disintegrating agents.
• tablets and capsules represent the most advantageous oral dosage unit forms, in which case solid excipients are employed. If desired, tablets can be coated by standard aqueous or nonaqueous techniques.
• dosage forms can be prepared by any of the methods of pharmacy, hi general, pharmaceutical compositions and dosage forms are prepared by uniformly and intimately admixing the active ingredients with liquid carriers, finely divided solid carriers, or both, and then shaping the product into the desired presentation if necessary.
• a tablet can be prepared by compression or molding.
• Compressed tablets can be prepared by compressing in a suitable machine the active ingredients in a free-flowing form such as powder or granules, optionally mixed with an excipient.
• Molded tablets can be made by molding in a suitable machine a mixture of the powdered compound moistened with an inert liquid diluent.
• excipients that can be used in oral dosage forms of the invention include, but are not limited to, binders, fillers, disintegrants, and lubricants.
• Binders suitable for use in pharmaceutical compositions and dosage forms include, but are not limited to, corn starch, potato starch, or other starches, gelatin, natural and synthetic gums such as acacia, sodium alginate, alginic acid, other alginates, powdered tragacanth, guar gum, cellulose and its derivatives (e.g., ethyl cellulose, cellulose acetate, carboxymethyl cellulose calcium, sodium carboxymethyl cellulose), polyvinyl pyrrolidone, methyl cellulose, pre-gelatinized starch, hydroxypropyl methyl cellulose, (e.g., Nos. 2208, 2906, 2910), macrocrystalline cellulose, and mixtures thereof.
• Suitable forms of microcrystalline cellulose include, but are not limited to, the materials sold as AVICEL-PH-101, AVICEL-PH-103 AVICEL RC-581, AVICEL-PH-105 (available from FMC Corporation, American Viscose Division, Avicel Sales, Marcus Hook, PA), and mixtures thereof.
• An specific binder is a mixture of microcrystalline cellulose and sodium carboxymethyl cellulose sold as AVICEL RC-581.
• Suitable anhydrous or low moisture excipients or additives include AVICEL-PH-103TM and Starch 1500 LM.
• fillers suitable for use in the pharmaceutical compositions and dosage forms disclosed herein include, but are not limited to, talc, calcium carbonate (e.g., granules or powder), microcrystalline cellulose, powdered cellulose, dextrates, kaolin, mannitol, silicic acid, sorbitol, starch, pre-gelatinized starch, and mixtures thereof.
• the binder or filler in pharmaceutical compositions of the invention is typically present in from about 50 to about 99 weight percent of the pharmaceutical composition or dosage form.
• Disintegrants are used in the compositions of the invention to provide tablets that disintegrate when exposed to an aqueous environment.
• Tablets that contain too much disintegrant may disintegrate in storage, while those that contain too little may not disintegrate at a desired rate or under the desired conditions.
• a sufficient amount of disintegrant that is neither too much nor too little to detrimentally alter the release of the active ingredients should be used to form solid oral dosage forms of the invention.
• the amount of disintegrant used varies based upon the type of formulation, and is readily discernible to those of ordinary skill in the art.
• Typical pharmaceutical compositions comprise from about 0.5 to about 15 weight percent of disintegrant, preferably from about 1 to about 5 weight percent of disintegrant.
• Disintegrants that can be used in pharmaceutical compositions and dosage forms of the invention include, but are not limited to, agar-agar, alginic acid, calcium carbonate, microcrystalline cellulose, croscarmellose sodium, crospovidone, polacrilin potassium, sodium starch glycolate, potato or tapioca starch, other starches, pre-gelatinized starch, other starches, clays, other algins, other celluloses, gums, and mixtures thereof.
• Lubricants that can be used in pharmaceutical compositions and dosage forms of the invention include, but are not limited to, calcium stearate, magnesium stearate, mineral oil, light mineral oil, glycerin, sorbitol, mannitol, polyethylene glycol, other glycols, stearic acid, sodium lauryl sulfate, talc, hydrogenated vegetable oil (e.g., peanut oil, cottonseed oil, sunflower oil, sesame oil, olive oil, corn oil, and soybean oil), zinc stearate, ethyl oleate, ethyl laureate, agar, and mixtures thereof.
• calcium stearate e.g., magnesium stearate, mineral oil, light mineral oil, glycerin, sorbitol, mannitol, polyethylene glycol, other glycols, stearic acid, sodium lauryl sulfate, talc
• hydrogenated vegetable oil e.g., peanut oil, cottonseed oil
• Additional lubricants include, for example, a syloid silica gel (AEROSIL200, manufactured by W.R. Grace Co. of Baltimore, MD), a coagulated aerosol of synthetic silica (marketed by Degussa Co. of Piano, TX), CAB-O-SIL (a pyrogenic silicon dioxide product sold by Cabot Co. of Boston, MA), and mixtures thereof. If used at all, lubricants are typically used in an amount of less than about 1 weight percent of the pharmaceutical compositions or dosage forms into which they are incorporated.
• AEROSIL200 syloid silica gel
• a coagulated aerosol of synthetic silica marketed by Degussa Co. of Piano, TX
• CAB-O-SIL a pyrogenic silicon dioxide product sold by Cabot Co. of Boston, MA
• lubricants are typically used in an amount of less than about 1 weight percent of the pharmaceutical compositions or dosage forms into which they are incorporated.
• a preferred solid oral dosage form of the invention comprises an immunomodulatory compound of the invention, anhydrous lactose, microcrystalline cellulose, polyvinylpyrrolidone, stearic acid, colloidal anhydrous silica, and gelatin.
• Active ingredients of the invention can be administered by controlled release means or by delivery devices that are well known to those of ordinary skill in the art. Examples include, but are not limited to, those described in U.S. Patent Nos.: 3,845,770; 3,916,899; 3,536,809; 3,598,123; and 4,008,719, 5,674,533, 5,059,595, 5,591,767, 5,120,548, 5,073,543, 5,639,476, 5,354,556, and 5,733,566, each of which is incorporated herein by reference.
• Such dosage forms can be used to provide slow or controlled-release of one or more active ingredients using, for example, hydropropylmethyl cellulose, other polymer matrices, gels, permeable membranes, osmotic systems, multilayer coatings, microparticles, liposomes, microspheres, or a combination thereof to provide the desired release profile in varying proportions.
• Suitable controlled-release formulations known to those of ordinary skill in the art, including those described herein, can be readily selected for use with the active ingredients of the invention.
• the invention thus encompasses single unit dosage forms suitable for oral administration such as, but not limited to, tablets, capsules, gelcaps, and caplets that are adapted for controlled-release.
• controlled-release pharmaceutical products have a common goal of improving drug therapy over that achieved by their non-controlled counterparts.
• the use of an optimally designed controlled-release preparation in medical treatment is characterized by a minimum of drug substance being employed to cure or control the condition in a minimum amount of time.
• Advantages of controlled-release formulations include extended activity of the drug, reduced dosage frequency, and increased patient compliance.
• controlled-release formulations can be used to affect the time of onset of action or other characteristics, such as blood levels of the drug, and can thus affect the occurrence of side (e.g., adverse) effects.
• Controlled-release formulations are designed to initially release an amount of drug (active ingredient) that promptly produces the desired therapeutic effect, and gradually and continually release of other amounts of drug to maintain this level of therapeutic or prophylactic effect over an extended period of time.
• the drug In order to maintain this constant level of drug in the body, the drug must be released from the dosage form at a rate that will replace the amount of drug being metabolized and excreted from the body.
• Controlled- release of an active ingredient can be stimulated by various conditions including, but not limited to, pH, temperature, enzymes, water, or other physiological conditions or compounds.
• Parenteral dosage forms can be administered to patients by various routes including, but not limited to, subcutaneous, intravenous (including bolus injection), intramuscular, and intraarterial. Because their administration typically bypasses patients' natural defenses against contaminants, parenteral dosage forms are preferably sterile or capable of being sterilized prior to administration to a patient. Examples of parenteral dosage forms include, but are not limited to, solutions ready for injection, dry products ready to be dissolved or suspended in a pharmaceutically acceptable vehicle for injection, suspensions ready for injection, and emulsions.
• Suitable vehicles that can be used to provide parenteral dosage forms of the invention are well known to those skilled in the art. Examples include, but are not limited to: Water for Injection USP; aqueous vehicles such as, but not limited to, Sodium Chloride Injection, Ringer's Injection, Dextrose Injection, Dextrose and Sodium Chloride Injection, and Lactated Ringer's Injection; water-miscible vehicles such as, but not limited to, ethyl alcohol, polyethylene glycol, and polypropylene glycol; and non-aqueous vehicles such as, but not limited to, corn oil, cottonseed oil, peanut oil, sesame oil, ethyl oleate, isopropyl myristate, and benzyl benzoate.
• water for Injection USP Water for Injection USP
• aqueous vehicles such as, but not limited to, Sodium Chloride Injection, Ringer's Injection, Dextrose Injection, Dextrose and Sodium Chloride
• cyclodextrin and its derivatives can be used to increase the solubility of an immunomodulatory compound of the invention, and its derivatives. See, e.g., U.S. Patent No. 5,134,127, which is incorporated herein by reference.
• Topical and mucosal dosage forms of the invention include, but are not limited to, sprays, aerosols, solutions, emulsions, suspensions, or other forms known to one of skill in the art. See, e.g., Remington 's Pharmaceutical Sciences, 16 th and 18 th eds., Mack Publishing, Easton PA (1980 & 1990); and Introduction to Pharmaceutical Dosage Forms, 4th ed., Lea & Febiger, Philadelphia (1985). Dosage forms suitable for treating mucosal tissues within the oral cavity can be formulated as mouthwashes or as oral gels.
• Suitable excipients e.g., carriers and diluents
• other materials that can be used to provide topical and mucosal dosage forms encompassed by this invention are well known to those skilled in the pharmaceutical arts, and depend on the particular tissue to which a given pharmaceutical composition or dosage form will be applied.
• typical excipients include, but are not limited to, water, acetone, ethanol, ethylene glycol, propylene glycol, butane-l,3-diol, isopropyl myristate, isopropyl palmitate, mineral oil, and mixtures thereof to form solutions, emulsions or gels, which are non-toxic and pharmaceutically acceptable.
• Moisturizers or humectants can also be added to pharmaceutical compositions and dosage forms if desired. Examples of such additional ingredients are well known in the art. See, e.g., Remington 's Pharmaceutical Sciences, 16 and 18 th eds., Mack Publishing, Easton PA (1980 & 1990).
• the pH of a pharmaceutical composition or dosage form may also be adjusted to improve delivery of one or more active ingredients.
• the polarity of a solvent carrier, its ionic strength, or tonicity can be adjusted to improve delivery.
• Compounds such as stearates can also be added to pharmaceutical compositions or dosage forms to advantageously alter the hydrophihcity or lipophilicity of one or more active ingredients so as to improve delivery.
• stearates can serve as a lipid vehicle for the formulation, as an emulsifying agent or surfactant, and as a delivery-enhancing or penetration-enhancing agent.
• Different salts, hydrates or solvates of the active ingredients can be used to further adjust the properties of the resulting composition.
• kits which, when used by the medical practitioner, can simplify the administration of appropriate amounts of active ingredients to a patient.
• a typical kit of the invention comprises a dosage form of an immunomodulatory compound of the invention, or a pharmaceutically acceptable salt salt, solvate, hydrate, stereoisomer, prodrug, or clathrate thereof.
• Kits encompassed by this invention can further comprise additional active ingredients such as G-CSF, GM-CSF, EPO, topotecan, pentoxifylline, ciprofloxacin, dexamethasone, IL2, IL8, IL18, Ara-C, vinorelbine, isotretinoin, 13-cis-retinoic acid, or a pharmacologically active mutant or derivative thereof, or a combination thereof.
• additional active ingredients include, but are not limited to, those disclosed herein (see, e.g., section 4.2).
• Kits of the invention can further comprise devices that are used to administer the active ingredients.
• devices include, but are not limited to, syringes, drip bags, patches, and inhalers.
• Kits of the invention can further comprise cells or blood for transplantation as well as pharmaceutically acceptable vehicles that can be used to administer one or more active ingredients.
• the kit can comprise a sealed container of a suitable vehicle in which the active ingredient can be dissolved to form a particulate-free sterile solution that is suitable for parenteral administration.
• Examples of pharmaceutically acceptable vehicles include, but are not limited to: Water for Injection USP; aqueous vehicles such as, but not limited to, Sodium Chloride Injection, Ringer's Injection, Dextrose Injection, Dextrose and Sodium Chloride Injection, and Lactated Ringer's Injection; water- miscible vehicles such as, but not limited to, ethyl alcohol, polyethylene glycol, and polypropylene glycol; and non-aqueous vehicles such as, but not limited to, corn oil, cottonseed oil, peanut oil, sesame oil, ethyl oleate, isopropyl myristate, and benzyl benzoate.
• aqueous vehicles such as, but not limited to, Sodium Chloride Injection, Ringer's Injection, Dextrose Injection, Dextrose and Sodium Chloride Injection, and Lactated Ringer's Injection
• water- miscible vehicles such as, but not limited to, ethyl alcohol, poly
• 3-(4-amino-l-oxo-l,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione was at least 50 times more potent than thalidomide.
• the IC 50 's of 3-(4-amino-l-oxo-l,3-dihydro-isoindol-2-yl)-piperidine- 2,6-dione for inhibiting production of TNF- ⁇ following LPS-stimulation of PBMC and human whole blood were -100 nM (25.9 ng/mL) and -480 nM (103.6 ng/mL), respectively.
• Thalidomide in contrast, had an IC 50 of -194 ⁇ M (50.2 ⁇ g/mL) for inhibiting production of TNF- ⁇ following LPS-stimulation of PBMC.
• n vitro studies suggest a pharmacological activity profile for 3-(4-amino-l-oxo- l,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione that is similar to, but 50 to 2000 times more potent than, thalidomide.
• the pharmacological effects of 3-(4-amino-l-oxo-l,3-dihydro- isoindol-2-yl)-piperidine-2,6-dione derive from its action as an inhibitor of cellular response to receptor-initiated trophic signals (e.g., IGF-1, VEGF, cyclooxygenase-2), and other activities.
• receptor-initiated trophic signals e.g., IGF-1, VEGF, cyclooxygenase-2
• 3-(4-amino-l-oxo-l,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione suppresses the generation of inflammatory cytokines, down-regulates adhesion molecules and apoptosis inhibitory proteins (e.g., cFLIP, cIAP), promotes sensitivity to death-receptor initiated programmed cell death, and suppresses angiogenic response.
• apoptosis inhibitory proteins e.g., cFLIP, cIAP
• An imnxunomodulatory compound of the invention such as 4-(amino)-2-(2,6- dioxo(3-piperidyl))-isoindoline-l,3-dione and 3-(4-amino-l-oxo-l,3-dihydro-isoindol-2-yl)- piperidine-2,6-dione, is administered in an amount of from about 0.1 to about 25 mg per day to patients with MDS for 16 weeks, who are subsequently evaluated for a hematological response.
• IPSS International Prognostic Scoring System
• fifteen patients are enrolled in the first cohort and receive treatment with 25 mg per day of 3-(4-amino-l-oxo-l,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione.
• the number of patients who subsequently experience an erythroid response (major or minor response) by week 16 is evaluated. If no responses are observed, the study is terminated due to lack of efficacy. If, however, 4 or more patients respond, the study is terminated due to promising clinical activity.
• a second cohort of 10 patients is enrolled.
• FAB types of the MDS patients include RA [4 patients], RARS [4 patients], RAEB [6 patients], and RAEB-T [lpatient] with corresponding IPSS categories of Low/hit- 1 in 11 patients and fr ⁇ t-2/High in four patients.
• Hematologic responses included RBC transfusion-independence [4 patients], decrease in RBC transfusions of more than 50% [1 patient], increase in Hgb of more than 1.5 g [1 patient], and one minor platelet response (increase of more than 30,000/ ⁇ L ).
• three patients achieved either a complete or partial (decrease in abnormal metaphases of more than 50%) remission.
• Responses were associated with normalization of blast percentage [1 patient], reduced grade of BM cytologic dysplasia, and 50% to more than 40 times improvement in BM multipotent progenitor (CFU-GEMM) and erythroid burst (BFU-E) formation.
• CFU-GEMM multipotent progenitor
• BFU-E erythroid burst
• the clinical study was expanded with additional 16 MDS patients for at least eight weeks.
• 13 of these patients were categorized as low- or intermediate- 1 -risk patients and three patients were grouped as intermediate-2- or high-risk patients.
• the FAB classification there were 11 patients with refractory anemia (RA) or RA with ringed sideroblasts (RARS), and five patients with RA with excess blasts (RAEB), RAEB in transformation (RAEB-T).
• RA refractory anemia
• RARS ringed sideroblasts
• RAEB RA with excess blasts
• RAEB-T RAEB in transformation
• 3-(4-amino-l-oxo-l,3-dihydro- isoindol-2-yl)-piperidine-2,6-dione was 25 mg daily for the first 13 patients and 10 mg daily for the remaining three patients. All patients receiving the starting dose of 25 mg required dose reduction by the completion of eight weeks therapy.
• the erythroid responses consisted of transfusion independence in seven previously transfusion-dependent patients, a >2 g/dL rise in blood hemoglobin concentration in one patient in with transfusion-independent anemia, and a >50 % decrease in RBC transfusion requirement in one transfusion-dependent patient. Therefore, a major erythroid response developed in eight of 16 patients and a minor erythroid response was observed in one patient. All of nine patients who showed erythroid response were low- or intermediate- 1- risk patients. One patient also had a minor platelet response.
• immunomodulatory compounds of the invention can be cyclically administered to patients with MDS. Cycling therapy involves the administration of a first agent for a period of time, followed by the administration of the agent and/or the second agent for a period of time and repeating this sequential administration. Cycling therapy can reduce the development of resistance to one or more of the therapies, avoid or reduce the side effects of one of the therapies, and/or improves the efficacy of the treatment.
• prophylactic or therapeutic agents are administered in a cycle of about 16 weeks, about once or twice every day.
• One cycle can comprise the administration of a therapeutic on prophylactic agent and at least one (1), two (2), or three (3) weeks of rest.
• the number of cycles administered is from about 1 to about 12 cycles, more typically from about 2 to about 10 cycles, and more typically from about 2 to about 8 cycles.
• the objectives of the study are to evaluate the efficacy and safety of oral administration of 3-(4-amino-l-oxo-l,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione in patients with MDS.
• Patients receive the compound in an amount of 10 mg/d or 15 mg/d for 21 days every 28 days in 4-week cycles for 16 weeks (4 cycles) or 24 weeks (6 cycles).
• the subject population comprises patients with low- or interemediate-1-risk MDS (International Prognostic Scoring System) with red blood cell transfusion-dependent anemia who have received at least two units of RBCs within 8 week of baseline (first day of study treatment).
• bone marrow aspirates/biopsies with cytogenic analyses are obtained at baseline, after the completion of 3 cycles and after the completion of 6 cycles.
• the bone marrow, safety and efficacy data are reviewed to assess benefit-to-risk considerations throughout the study.
• the study reviews red blood cell transfusion independence and major erythroid response according to the International MDS Working Group Criteria. Further, the study observes red blood cell transfusion independence in the subgroup of patients with the 5q deletion cytogenetic abnonnality; platelet, neutrophil, bone marrow and cytogenetic responses; and minor erythroid response of 50 % but ⁇ 100 % reduction in red blood cell transfusion requirement over an 8 week period.
• the study further monitors adverse events, hematological tests, serum chemistries, TSH, urinalysis, urine or serum pregnancy tests, vital signs, ECG and physical examinations.
• the objectives of the study are to compare the efficacy and safety of oral administration of 3 -(4-amino- 1 -oxo- 1 ,3 -dihydro-isoindol-2-yl)-piperidine-2,6-dione to that of placebo plus standard care in patients with MDS.
• Patients receive the therapy in 4-week cycles for 16 weeks (4 cycles) or 24 weeks (6 cycles).
• the subject population comprise patients with low- or interemediate-1-risk MDS (International Prognostic Scoring System) with red blood cell transfusion-dependent anemia who have received at least two units of RBCs within 8 week of baseline (first day of study treatment).
• the study visits to assess safety and efficacy occur every 4 weeks and hematologic laboratory monitoring is performed every 2 weeks.
• Bone marrow aspirates/biopsies with cytogenetic analyses are obtained at baseline after the completion of 3 cycles and after the completion of 6 cycles. Bone marrow findings, safety and efficacy data are reviewed to assess benefit-to-risk considerations throughout the study. An extension study of continued treatments with the administration of the compound is available for patients who derive clinical benefit from 6 cycles of the therapy and to provide an opportunity for subjects who were randomized to placebo to cross over to the therapy. Embodiments of the invention described herein are only a sampling of the scope of the invention. The full scope of the invention is better understood with reference to the attached claims.

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