US20170137505A1 - Treatment of congestive heart failure and other cardiac dysfunction using a gdf15 modulator - Google Patents

Treatment of congestive heart failure and other cardiac dysfunction using a gdf15 modulator Download PDF

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US20170137505A1
US20170137505A1 US15/320,094 US201515320094A US2017137505A1 US 20170137505 A1 US20170137505 A1 US 20170137505A1 US 201515320094 A US201515320094 A US 201515320094A US 2017137505 A1 US2017137505 A1 US 2017137505A1
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gdf15
cardiac
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Jeno Gyuris
Lorena Lerner
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Aveo Pharmaceuticals Inc
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/22—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against growth factors ; against growth regulators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/04—Inotropic agents, i.e. stimulants of cardiac contraction; Drugs for heart failure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/565—Complementarity determining region [CDR]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/76—Antagonist effect on antigen, e.g. neutralization or inhibition of binding

Definitions

  • the present invention relates to methods of using, and compositions containing, a GDF15 modulator for treating a subject having a cardiac disorder or dysfunction, for example, congestive heart failure, chronic heart failure and acute cardiac conditions such as myocardial infarction.
  • a cardiac disorder or dysfunction for example, congestive heart failure, chronic heart failure and acute cardiac conditions such as myocardial infarction.
  • Heart failure also called congestive heart failure, is a common and expensive condition that is highly debilitating and potentially lethal. It is a leading cause of hospitalization in people aged over 65 years. Heart failure may be the result of rapid onset, termed “acute heart failure” or may develop over long periods of time, termed “chronic heart failure.”
  • Heart failure may be associated with a number of other cardiac conditions, disorders and dysfunctions, including: cardiac arrest or heart stoppage; myocardial infarction (also known as a heart attack) which refers to heart muscle damage, usually due to insufficient blood supply, for example, due to a blocked coronary artery; and cardiomyopathy, referring to damage to heart muscle, which may be genetic, or acquired, and which may be dilated, hypertrophic or restrictive.
  • Dilated cardiomyopathy is primarily genetic in origin, and involves stretching and thinning of the muscle, usually in the left ventricle. When this happens, the heart muscle becomes unable to pump blood efficiently around the body, which can lead to fluid accumulating in the lungs ankles, abdomen and other organs, as well as a feeling of breathlessness.
  • Hypertrophic cardiomyopathy involves thickening of the heart muscle, which may result in myocardial disarray of the cell structure, stiffening of the heart muscle and high blood pressure.
  • Restrictive cardiomyopathy involves a stiffening of the walls of the ventricles, so that they resist normal filling with blood.
  • Restrictive cardiomyopathies can result from a number of causes, such as: hemochromatosis, in which too much iron builds up in the body, which can damage the heart; sarcoidosis, in which abnormal inflammation causes lumps of cells to form in the body's organs, including the heart; and amyloidosis, in which abnormal levels of protein, such as amylin, build up in the organs, including the heart.
  • cardiac-related conditions that may be associated with heart failure include: cardiac hypertrophy, ischemic/reperfusion injury, dyspnea, idiopathic pulmonary arterial hypertension, ST-segment elevation myocardial infarction (STEMI), and cardiovascular dysfunction.
  • cardiac hypertrophy ischemic/reperfusion injury
  • dyspnea idiopathic pulmonary arterial hypertension
  • STEMI ST-segment elevation myocardial infarction
  • GDF15 Growth Differentiation Factor-15
  • TGF- ⁇ transforming growth factor-beta
  • BMPs bone morphogenetic proteins
  • GDNF glial cell-line derived neurotrophic factor
  • myostatin also known as GDF-8
  • GDF15 was isolated initially from such tissues as prostate and placenta, and has been known by the additional names macrophage inhibitory cytokine 1 (or MIC1), NSAID-activated gene 1 protein (or NAG1), NSAID-regulated gene 1 protein (or NRG-1), placental TGF-beta (or PTGFB), placental bone morphogenetic protein (or PLAB), and prostate differentiation factor (or PDF).
  • macrophage inhibitory cytokine 1 or MIC1
  • NAG1 NSAID-activated gene 1 protein
  • NRG-1 NSAID-regulated gene 1 protein
  • PTGFB placental TGF-beta
  • PLAB placental bone morphogenetic protein
  • PDF prostate differentiation factor
  • the present inventors have found that subjects suffering from cardiac conditions and disorders, such as congestive heart failure, that are not effectively or optimally treated with presently available methods surprisingly may be effectively treated with a composition that selectively reduces or inhibits the activity of GDF15. This may be effected by reducing the expression, level or amount, or biological activity, of GDF15 in a subject, which can be measured, for example, in the subject's serum or plasma.
  • the present invention provides methods and compositions for treating a subject having a cardiovascular disease, congestive or chronic heart failure, myocardial hypertrophy or hypotrophy, acute coronary syndrome, angina, or other cardiac disorder or condition, or who has suffered a cardiac event such as a myocardial infarction, or who has had, or is diagnosed as needing, a cardiac intervention, such as percutaneous coronary intervention, coronary artery bypass grafting, coronary angioplasty or stent placement.
  • a cardiac intervention such as percutaneous coronary intervention, coronary artery bypass grafting, coronary angioplasty or stent placement.
  • the invention comprises compositions which reduce or inhibit the activity of GDF15, for example, by reducing the ability of GDF15 to bind to an endogenous binding partner (also referred to as cognate receptor or binding partner), for example, by competitively binding to GDF15 or to an endogenous binding partner, or by otherwise neutralizing the activity of GDF15.
  • an endogenous binding partner also referred to as cognate receptor or binding partner
  • such a composition may comprise an antibody that binds to GDF15 or an endogenous binding partner, as well as a peptide or fusion molecule that comprises such an antibody.
  • the composition may comprise a peptide or small molecule that binds, for example, competitively binds, to GDF15 or to an endogenous binding partner, such that the activity of GDF15 is reduced or inhibited, for example, by reducing or inhibiting the ability of GDF15 to bind to its endogenous binding partner or otherwise neutralizing the activity of GDF15.
  • the invention comprises a method of treating a subject exhibiting one or more cardiac related characteristics, which can be symptoms of cardiovascular disease or dysfunction, congestive or chronic heart failure, cardiac myopathies, cardiac hypertrophy, ischemic/reperfusion injury, dyspnea, idiopathic pulmonary arterial hypertension, ST-segment elevation myocardial infarction (STEMI), or other cardiac disorder or condition.
  • cardiac related characteristics can be symptoms of cardiovascular disease or dysfunction, congestive or chronic heart failure, cardiac myopathies, cardiac hypertrophy, ischemic/reperfusion injury, dyspnea, idiopathic pulmonary arterial hypertension, ST-segment elevation myocardial infarction (STEMI), or other cardiac disorder or condition.
  • the above cardiac-related characteristics can also be used to monitor the subject's progress in response to treatment with a GDF15 modulator in accordance with the present invention, and to modify the dosing regimen if deemed clinically appropriate.
  • the subject having a cardiovascular disease or cardiac disorder such as congestive or chronic heart failure (CHF)
  • CHF congestive or chronic heart failure
  • the present invention provides methods and compositions for avoiding or reducing the occurrence and/or severity of at least one of the above cardiac-related characteristics, and may also avoid or reduce the need for one of the cardiac interventions described above.
  • the invention provides a method of improving or increasing cardiac function in a subject in need thereof, the method comprising administering an effective amount of a composition comprising a GDF15 modulator thereby to improve or increase cardiac function in the subject.
  • Cardiac function can include any of the biochemical and physiological parameters discussed below.
  • the invention provides a method of treating a subject having a cardiac disorder or dysfunction, the method comprising administering an effective amount of a composition comprising a GDF15 modulator thereby to ameliorate a symptom of the cardiac disorder or dysfunction.
  • the symptoms can include any of the biochemical and physiological parameters discussed below.
  • the invention provides a method of reducing or reversing cardiac hypotrophy in a subject exhibiting one or more symptoms of congestive heart failure, the method comprising administering an effective amount of a composition comprising a GDF15 modulator, wherein the composition ameliorates at least one symptom of cardiac hypotrophy in the subject.
  • the symptoms can include any of the biochemical and physiological parameters discussed below.
  • the invention provides a method of treating or preventing congestive heart failure in a subject in need thereof, the method comprising administering an effective amount of a composition that reduces or inhibits a GDF15 activity in the subject, thereby to treat or prevent CHF in the subject.
  • the symptoms can include any of the biochemical and physiological parameters discussed below.
  • the invention provides a method of reducing or reversing cardiac hypotrophy in a subject exhibiting one or more characteristics of congestive heart failure, the method comprising administering an effective amount of a composition that modulates the activity of GDF15, thereby to reduce cardiac hypotrophy in the subject.
  • the symptoms can include any of the biochemical and physiological parameters discussed below.
  • the subject has elevated GDF15 activity in a body fluid, for example, serum or plasma.
  • elevated GDF15 activity means elevated GDF15 levels.
  • the subject exhibits a peak VO 2 of less than less than 14 mL/kg/min, an LVEF of less than 40%, BNP levels in excess of 100 pg/ml, serum cardiac troponin I (cTnI) levels in excess of 1.5 ng/mL, or any combination of the foregoing.
  • the subject has already been diagnosed as having congestive heart failure.
  • the GDF15 modulator of the invention can reduce or inhibit GDF15 activity in the subject. In some embodiments, the GDF15 modulator inhibits the activity, expression or binding of GDF15 to its cognate receptor. In some embodiments, the GDF15 modulator binds GDF15.
  • the GDF15 modulator can be an anti-GDF15 antibody, which can be humanized or human.
  • the subject exhibits above normal levels of a biomarker selected from the group consisting of cardiac troponin I, cardiac troponin T, brain natriuretic protein (BNP), N-terminal peptides derived from BNP (NT-proBNP), and cardiac fatty acid binding protein (cFABP).
  • a biomarker selected from the group consisting of cardiac troponin I, cardiac troponin T, brain natriuretic protein (BNP), N-terminal peptides derived from BNP (NT-proBNP), and cardiac fatty acid binding protein (cFABP).
  • Methods according to the invention can include administering an effective amount of a composition that inhibits a GDF15 mediated pathway, thereby to treat a subject having one or more of the following characteristics: cardiac hypertrophy or cardiac hypotrophy; signs or symptoms of chest pain or discomfort (angina), shortness of breath, and fatigue with activity or exertion; peak VO 2 ; elevated or above normal levels of troponin; elevated or above normal levels of brain natriuretic protein (BNP) or an N-terminal fragment thereof (NT-ProBNP); low normal or below normal levels of heart type fatty acid binding protein (hFABP); an abnormal electrocardiogram test or having abnormal heart physiology or activity, for example, reduced auricular or ventricular ejection volume; having experienced, or diagnosed to be at risk for angina, a myocardial infarction, or thromboembolic stroke; or having had or diagnosed as needing, a coronary intervention, such as percutaneous coronary intervention, coronary artery bypass grafting, coronary angioplasty, s
  • GDF15 modulator used to improve or ameliorate at least one of the following characteristics in a subject, wherein the subject has been diagnosed as, or considered to be at risk of developing CHF, a cardiac myopathy, or heart failure:
  • the subject having a cardiovascular disease or cardiac disorder has previously been treated with a known treatment, but persists in exhibiting at least one of the above characteristics.
  • the present invention provides methods and compositions for avoiding or reducing the occurrence and/or severity of at least one of the above cardiac-related characteristics, and may also avoid or reduce the need for one of the coronary interventions described above.
  • the subject exhibits one or more of the following characteristics such that the subject is considered to have or be suffering from CHF, such that the subject may benefit from treatment according to the present invention.
  • the term “considered to have CHF” or “considered to be suffering from CHF” means that following the disclosure of this application, one skilled in the art would expect that a subject would benefit from the administration of GDF15 inhibitors in accordance with the present invention.
  • a subject is also “considered to have CHF” or “considered to be suffering from CHF” if a qualified clinical professional, after examination of information related to the subject, has made the professional judgment or diagnosis that the subject presently suffers from CHF.
  • CHF CHF
  • GDF15 inhibitors GDF15 inhibitors in accordance with the present invention.
  • a subject is also term “considered to be at risk of developing CHF” if a qualified clinical professional, after examination of information related to the subject, has made the professional judgment or diagnosis that the subject presently a risk of developing CHF, sufficient to justify prophylactic or therapeutic intervention.
  • FIG. 1 is a graph illustrating GDF15 levels in human subjects who are not suffering from congestive heart failure (“non-CHF”); subjects who exhibit symptoms of congestive heart failure without cachexia (“CHF”); and subjects who exhibit symptoms of congestive heart failure with cachexia (“CHF Ca”).
  • non-CHF congestive heart failure
  • CHF congestive heart failure without cachexia
  • CHF Ca congestive heart failure with cachexia
  • FIG. 2 is a graph illustrating the correlation between GDF15 serum levels and severity of congestive heart failure.
  • NYHA refers to the New York Heart Association classification system (I is least severe, IV is most severe).
  • FIGS. 3A-3C are graphs illustrating the correlation between GDF15 levels and peak volume of oxygen (VO 2 ), which is a marker of cardiac function. Peak VO 2 levels decrease with increased GDF15 levels in 200 subjects with CHF ( FIG. 3A ), comprising 33 subjects with cachexia ( FIG. 3B ), and 167 subjects without cachexia, as a co-morbidity of CHF ( FIG. 3C ).
  • FIG. 4 is a graph illustrating the correlation between GDF15 levels and transferrin saturation (TSAT), an indicator of anemia, which is a frequent co-morbidity of cardiac failure.
  • TSAT transferrin saturation
  • the accompanying table illustrates transferrin levels; iron levels; hemoglobin levels (“Hb g/dl”), erythrocyte levels and ferritin levels.
  • FIGS. 5A-5C are graphs illustrating the correlation between GDF15 levels and various markers of decreased kidney function, which is a frequent co-morbidity of CHF.
  • FIG. 5A shows that creatinine levels are increased with GDF15 levels in 200 subjects with CHF;
  • FIG. 5B shows that urea levels are increased with GDF15 levels in 33 subjects with CHF and cachexia co-morbidity;
  • FIG. 5C shows that creatinine levels are increased with GDF15 levels in 167 subjects with CHF without cachexia co-morbidity.
  • FIGS. 6A-6D are graphs illustrating the correlation between GDF15 levels and various markers of kidney disease, a frequent co-morbidity of CHF, across subjects with CHF stages I-III (Stage IV was not included due to low number of subjects), including urea ( FIG. 6A ), where urea level increased with GDF15 level; uric acid ( FIG. 6B ), where uric acid level increased with GDF15 level; creatinine ( FIG. 6C ), where creatinine level increased with GDF15 level; and glomerular filtration rate (GFR) ( FIG. 6D ), where GFR decreased with GDF15 level.
  • urea FIG. 6A
  • uric acid FIG. 6B
  • creatinine FIG. 6C
  • GFR glomerular filtration rate
  • FIGS. 7A-7B are graphs summarizing results from an experiment to demonstrate the activity of anti-GDF15 antibody 01G06 ( ⁇ ), dosed at 2 mg/kg, in immune-incompetent mice (ICR-SCID) bearing an HT-1080 fibrosarcoma tumor xenograft model.
  • Treatment with antibody 01G06 reversed body weight loss ( FIG. 7A ), induced a gain of organ mass (liver, heart, spleen and kidney) and induced a gain of tissue mass (gonadal and gastrocnemius) ( FIG. 7B ), compared to the negative control (murine IgG ( ⁇ )) and baseline (day 1).
  • Vertical arrows indicate days where antibody was administered to test animals via intra-peritoneal injection ( FIG. 7A ).
  • FIG. 8 is a graph illustrating the effects of systemic administration of a monoclonal antibody that binds to and inhibits human GDF15 (Hu01G06-127) on body weight in cachexic mice bearing human tumor xenografts ( ⁇ ) compared to similar mice following administration of human IgG ( ⁇ ) and compared to sham mice (no tumor) ( ⁇ ).
  • the present invention provides methods and compositions for treating a subject having a cardiac related disease or disorder, for example, a subject having congestive or chronic heart failure, acute myocardial infarction, myocardial hypertrophy, and myocardial hypotrophy.
  • the methods and compositions may be useful in treating a subject who exhibits at least one characteristic that is symptomatic of a cardiac myopathy or other heart failure, including one or more of:
  • Treatment in accordance with the methods and compositions described herein may improve or ameliorate one or more the characteristics or symptoms noted above.
  • “treat,” “treating” and “treatment” mean the treatment of a disease in a mammal, e.g., in a human. This includes: (a) inhibiting the disease, i.e., arresting its development; and (b) relieving the disease, i.e., causing regression of the disease state.
  • Heart function can be assessed and monitored using a variety of approaches, including physiological and biochemical parameters, symptoms, functional markers and biomarkers of heart function.
  • Physiological and biochemical parameters of heart function can include glomerular filtration rate (GFR); carotid artery ultrasound evaluation; carotid artery IMT (intima-media thickness) and carotid plaque burden; left ventricular (LV) geometry and function; LV mass index; end-diastolic diameter and LV ejection fraction (echocardiography); forearm blood flow measurements, including endothelium-dependent and independent vasodilation of forearm; flow mediated dilation; and brachial artery ultrasound examination.
  • GFR glomerular filtration rate
  • IMT intima-media thickness
  • LV left ventricular
  • LV left ventricular
  • LV left ventricular
  • LV left ventricular
  • LV left ventricular
  • LV left ventricular
  • LV left ventricular
  • LV left ventricular
  • LV left ventricular
  • cardiac dysfunction or dysrhythmia measured by echocardiography; pulmonary congestion measured by chest x-ray; reduced exercise capacity; abnormal haemodynamics at rest; cardiac output; systemic vascular resistance; left ventricular stroke volume; aortic pressure; left ventricular pressure; peak rate of change of left ventricular pressure during isovolumic contraction and relaxation; left ventricular end-diastolic pressure; myocardial oxygen consumption; and coronary flow reserve.
  • Symptoms of cardiac disorders include chest pain, or angina; heart murmur or other abnormal sounds; fast or uneven pulse; an abnormal electrocardiogram or echocardiogram test; and an abnormal stress tests and electrocardiogram.
  • Biomarkers of cardiac disorders, such as congestive heart failure include: Brain Natriuretic Protein (BNP) and N-terminal fragments of the BNP propeptide (NT-ProBNP); troponins, particularly cardiac troponins (cTn), including troponin I and cardiac troponin I (cTnI);
  • troponin T and cardiac troponin T cTnT
  • troponin C TnC
  • heart type fatty acid binding protein hFABP
  • norepinephrine a fatty acid binding protein
  • atrial natriuretic peptide ABP
  • galectin-3 C-reactive protein
  • tumor necrosis factor- ⁇ TNF- ⁇
  • interleukin-1 interleukin-6.
  • the subject may also exhibit elevated levels of GDF15 activity relative to a baseline activity level present in subjects without the cardiac disorder or dysfunction.
  • Elevated levels of GDF15 activity can determined by measuring the level of GDF15 in a sample from a subject.
  • the amount regarded as an “elevated level” of GDF15 may vary according to the particular tissue or body fluid of interest, as well as the particular assay that is utilized.
  • an “elevated level” of GDF15 may be determined relative to a control distribution of subjects, for example, subjects without a cardiac disease or dysfunction, for example, CHF, and may be determined at a pre-specified cutoff of, for example, the 75 th percentile (i.e., upper quartile or 25%); 90 th percentile (i.e., upper 10%); or 95 th percentile (i.e., upper 5%).
  • An “elevated level” of GDF15 may also be determined at a pre-specified GDF15 level above the mean, for example one standard deviation above the mean, or two standard deviations above the mean average GDF15 level of a group of control subjects without cardiac disease or dysfunction, for example, CHF. See, for example, Brown et al., 2002, T HE L ANCET 359:2159-2163; Kempf et al., 2011, N ATURE M EDICINE, 17:581-588.
  • the preferred body sample is a body fluid, for example, a sample of blood plasma, however a sample of amniotic fluid, placental extract, whole blood, serum, buffy coat, urine, cerebrospinal fluid, seminal fluid, synovial fluid, or a tissue biopsy may also be suitable.
  • the amount of GDF15 present in a body sample may be readily determined by, for example, immunoassays (e.g., with a body fluid) or immunohistochemistry (e.g., with sectionalized samples of a tissue biopsy) using an anti-GDF15 antibody. See Tsai et al., 2013, PLOS O NE, 8:e55174.
  • a subject is considered to be suffering from congestive heart failure if the subject's peak measurement of oxygen uptake (peak VO 2 ) is less than a normal value, e.g., 14 mL/kg/min.
  • a normal value e.g. 14 mL/kg/min.
  • a subject is considered to be suffering from congestive heart failure if the subject's left ventricular ejection fraction (LVEF) is below a normal value, e.g., 40%.
  • LVEF left ventricular ejection fraction
  • a subject whose LVEF is between 40 and 55% is considered to have below normal LVEF, and is considered to be at risk of CHF.
  • LVEF can be measured, for example, using transthoracic echocardiography. (See, Cattadori et al., 2011, J. C ARDIAC F AILURE, 17:916-922). However, it is understood that “normal ranges” of LVEF can vary depending upon the specific laboratory and test.
  • a subject is considered to be suffering from congestive heart failure if the subject's serum BNP levels are in excess 100 pg/ml (mild CHF); or in excess of/below about 500 pg/ml (serious CHF).
  • a subject is considered to be at risk of CHF if the subject's serum BNP levels are high normal or above normal ranges, at a level of 50 pg/ml or greater.
  • the normal BNP range is considered to be at or below 50 pg/ml.
  • “High normal” concentration is considered to be in the upper quarter (25%) of the normal range; preferably in the upper tenth (10%) of the normal range. See, for example, Strunk et al., 2006, A M. J.
  • a subject is considered to be suffering from congestive heart failure if the subject's serum cardiac troponin I (cTnI) levels are in excess of 1.5 ng/mL (mild CHF), or in excess of 3.1 ng/mL (serious CHF).
  • cTnI serum cardiac troponin I
  • a subject is considered to be at risk of CHF if his or her serum troponin levels are high normal or above normal ranges, at a level of 1.5 ng/mL or greater.
  • “High normal” concentration is considered to be in the upper quarter (25%) of the normal range; preferably in the upper tenth (10%) of the normal range. See, for example, Galvani et al., 1995, C IRCULATION, 95:2053-2059.
  • troponin can vary depending upon the specific laboratory and test. Additionally, one skilled in the art will recognize that other tests are available for the diagnosis of chronic or congestive heart failure, based upon the quantitation of troponins, including other tests quantitating cTnI, overall TnI, overall cardiac troponins, troponin T (TnT), including high sensitivity TnT (hsTnT), troponin C and/or other troponins. See Heringlake et al., 2013, J. A M. C OLL. C ARDIOL. 61:672-68.
  • a subject is considered to be suffering from congestive heart failure if the subject's performance in a test of exercise or physiological capacity is indicative of reduced peak VO 2 , for example, in the six mile walking test (6MWT) or a shuttle walking test (SWT).
  • 6MWT six mile walking test
  • SWT shuttle walking test
  • a subject who covers a distance less than or equal to approximately 500 m in the 6MWT, or exhibits peak VO 2 of approximately 16.5 ml/kg or less during the 6MWT is considered to be suffering from CHF.
  • a subject is diagnosed to be suffering from congestive heart failure if the subject experiences pathological cardiac hypertrophy, or increase in heart mass, which is due to underlying disease.
  • Pathological cardiac hypertrophy is frequently referred to as ‘compensated cardiac hypertrophy,’ because the heart muscle grows larger in response to a decrease in functionality of myocardial tissue.
  • Pathological or compensated cardiac hypertrophy is different from physiological cardiac hypertrophy, or ‘athlete's heart,’ wherein a heart muscle grows larger in response to prolonged exercise and exercise regimens.
  • Cardiac hypertrophy may be diagnosed using known techniques and indices. For example, left ventricular hypertrophy (LVH) can be diagnosed using echocardiography.
  • LHL left ventricular hypertrophy
  • the left ventricular myocardium is normally from about 0.6 to 1.1 cm in thickness at the end of diastole. If the myocardium is more than 1.1 cm thick, the diagnosis of LVH can be made. Cardiac hypertrophy can also result from dilated cardiomyopathy (DCM), wherein a portion of the myocardium may become dilated without apparent reason. DCM may be diagnosed by examination of chest x-rays, electrocardiogram or echocardiogram. (See, myclevelandclinic.org/heart/disorders/hcm/default.aspx.)
  • a subject is considered to be suffering from congestive heart failure if the subject experiences or is diagnosed with pathological cardiac hypotrophy, or significant decrease in heart mass.
  • Cardiac hypotrophy is often due to reduced left ventricular mass (LVM).
  • LVM left ventricular mass
  • the above parameters can be easily measured before, during and after treatment with a GDF15 modulator.
  • treatment of a subject may improve the left ventricular ejection fraction by at least 1% (compared to the left ventricular ejection fraction prior to treatment).
  • treatment of a subject may improve the left ventricular ejection fraction by at least 2%, at least 3%, at least 4%, at least 5%, at least 6%, at least 7%, at least 8%, at least 9%, at least 10%, at least 12%, at least 14%, at least 16%, at least 18%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, or at least 50%.
  • the treatment may continue until the subject has attained a left ventricular ejection fraction of at least 30%, at least 31%, at least 32%, at least 33%, at least 34%, at least 35%, at least 36%, at least 37%, at least 38%, at least 39%, at least 40%, at least 41%, at least 42%, at least 43%, at least 44%, at least 45%, at least 46%, at least 47%, at least 48%, at least 49%, or at least 50%.
  • the treatment may provide a residual improvement in the left ventricular ejection fraction for at least 5 minutes, at least 10 minutes, at least 20 minutes, at least 30 minutes, at least 45 minutes, at least 1 hour, at least 2 hours, at least 3 hours, at least 4 hours, at least 5 hours, at least 6 hours, at least 12 hours, at least 1 day, at least 2 days, at least 3 days, at least 4 days, at least 5 days, at least 6 days, at least 7 days, at least 10 days, at least 14 days, at least 21 days, or at least 28 days.
  • treatment of a subject may improve the cardiac output by at least 1% (compared to the cardiac output prior to treatment).
  • treatment of a subject may improve the cardiac output by at least 2%, at least 3%, at least 4%, at least 5%, at least 6%, at least 7%, at least 8%, at least 9%, at least 10%, at least 12%, at least 14%, at least 16%, at least 18%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, or at least 50%.
  • the treatment may continue until the subject has attained a cardiac output of at least 2.5 L/min, at least 3.0 L/min, at least 3.5 L/min, at least 4.0 L/min, at least 4.5 L/min, at least 5.0 L/min, or at least 5.25 L/min.
  • the treatment may provide a residual improvement in the cardiac output for at least 5 minutes, at least 10 minutes, at least 20 minutes, at least 30 minutes, at least 45 minutes, at least 1 hour, at least 2 hours, at least 3 hours, at least 4 hours, at least 5 hours, at least 6 hours, at least 12 hours, at least 1 day, at least 2 days, at least 3 days, at least 4 days, at least 5 days, at least 6 days, at least 7 days, at least 10 days, at least 14 days, at least 21 days, or at least 28 days.
  • treatment of a subject may improve the left ventricular stroke volume by at least 1% (compared to the stroke volume prior to treatment). For example, treatment of a subject may improve the left ventricular stroke volume by at least 2%, at least 3%, at least 4%, at least 5%, at least 6%, at least 7%, at least 8%, at least 9%, at least 10%, at least 12%, at least 14%, at least 16%, at least 18%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, or at least 50%.
  • the treatment may continue until the subject has attained a left ventricular stroke volume of at least 27 ml, at least 30 ml, at least 35 ml, at least 40 ml, at least 45 ml, at least 50 ml, at least 55 ml, at least 60 ml, at least 65 ml, or at least 70 ml.
  • the treatment may provide a residual improvement in left ventricular stroke volume for at least 5 minutes, at least 10 minutes, at least 20 minutes, at least 30 minutes, at least 45 minutes, at least 1 hour, at least 2 hours, at least 3 hours, at least 4 hours, at least 5 hours, at least 6 hours, at least 12 hours, at least 1 day, at least 2 days, at least 3 days, at least 4 days, at least 5 days, at least 6 days, at least 7 days, at least 10 days, at least 14 days, at least 21 days, or at least 28 days.
  • treatment of a subject may reduce the systemic vascular resistance by at least 1% (compared to the systemic vascular resistance prior to treatment).
  • treatment of a subject may reduce the systemic vascular resistance by at least 2%, at least 3%, at least 4%, at least 5%, at least 6%, at least 7%, at least 8%, at least 9%, at least 10%, at least 12%, at least 14%, at least 16%, at least 18%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, or at least 50%.
  • the treatment may continue until the subject has attained a systemic vascular resistance of no more than 3500 dyn ⁇ s/cm 5 , no more than 3000 dyn ⁇ s/cm 5 , no more than 2500 dyn ⁇ s/cm 5 , no more than 2000 dyn ⁇ s/cm 5 , or no more than 1600 dyn ⁇ s/cm 5 .
  • the treatment may provide a residual improvement in the systemic vascular resistance for at least 5 minutes, at least 10 minutes, at least 20 minutes, at least 30 minutes, at least 45 minutes, at least 1 hour, at least 2 hours, at least 3 hours, at least 4 hours, at least 5 hours, at least 6 hours, at least 12 hours, at least 1 day, at least 2 days, at least 3 days, at least 4 days, at least 5 days, at least 6 days, at least 7 days, at least 10 days, at least 14 days, at least 21 days, or at least 28 days.
  • the present invention includes methods of increasing cardiac function in a subject in need thereof, the method comprising administering an effective amount of a composition comprising a GDF15 inhibitor to increase cardiac function in a subject who exhibits one or more comorbidity of CHF.
  • the subject suffering from cardiac dysfunction or CHF may exhibit a comorbidity of cachexia, chronic kidney disease, anemia, iron deficiency or hypertension.
  • GDF15 modulator is understood to mean an agent that reduces or inhibits GDF15 activity, which can result from reduced expression, amount, or biological activity or function, of GDF15.
  • GDF15 modulators or modulating agents useful in the practice of the invention may comprise an anti-GDF15 antibody, an anti-GDF15 receptor antibody, soluble GDF15 mimetics or analogs that prevent GDF15 from binding to its cognate binding partner, a soluble GDF15 receptor mimetic or analog that prevents GDF15 from binding to its cognate binding partner.
  • Additional exemplary GDF15 modulating agents include small molecule inhibitors of GDF15 or a GDF15 receptor, interfering nucleic acids (for example, interfering RNA or antisense nucleic acids (for example, antisense DNA or RNA) that interfere with expression of endogenous GDF15 or a cognate receptor.
  • interfering nucleic acids for example, interfering RNA or antisense nucleic acids (for example, antisense DNA or RNA) that interfere with expression of endogenous GDF15 or a cognate receptor.
  • the GDF15 modulating agent can comprise an anti-GDF15 antibody, which is humanized or human.
  • antibody is understood to mean an intact antibody (e.g., an intact monoclonal antibody) or antigen-binding fragment of an antibody, including an intact antibody or antigen-binding fragment of an antibody (e.g., a phage display antibody including a fully human antibody, a semisynthetic antibody or a fully synthetic antibody) that has been optimized, engineered or chemically conjugated.
  • antibodies that have been optimized are affinity-matured antibodies.
  • antibodies that have been engineered are Fc optimized antibodies, and multispecific antibodies (e.g., bispecific antibodies).
  • antigen-binding fragments examples include Fab, Fab′, F(ab′) 2 , Fv, single chain antibodies (e.g., scFv), minibodies and diabodies.
  • An antibody conjugated to a toxin moiety is an example of a chemically conjugated antibody.
  • the antibody comprises: (a) an immunoglobulin heavy chain variable region comprising the structure CDR H1 -CDR H2 -CDR H3 and (b) an immunoglobulin light chain variable region, wherein the heavy chain variable region and the light chain variable region together define a single binding site for binding GDF15 or a GDF15 receptor.
  • the CDR H1 , CDR H2 , and CDR H3 sequences are interposed between immunoglobulin framework (FR) sequences.
  • the antibody comprises (a) an immunoglobulin light chain variable region comprising the structure CDR L1 -CDR L2 -CDR L3 , and (b) an immunoglobulin heavy chain variable region, wherein the IgG light chain variable region and the IgG heavy chain variable region together define a single binding site for binding GDF15 or a GDF15 receptor.
  • the CDR L1 , CDR L2 , and CDR L3 sequences are interposed between immunoglobulin FR sequences.
  • the antibody comprises: (a) an immunoglobulin heavy chain variable region comprising the structure CDR H1 -CDR H2 -CDR H3 and (b) an immunoglobulin light chain variable region comprising the structure CDR L1 -CDR L2 -CDR L3 , wherein the heavy chain variable region and the light chain variable region together define a single binding site for binding GDF15 or a GDF15 receptor.
  • an immunoglobulin heavy chain variable region comprising the structure CDR H1 -CDR H2 -CDR H3
  • an immunoglobulin light chain variable region comprising the structure CDR L1 -CDR L2 -CDR L3
  • the heavy chain variable region and the light chain variable region together define a single binding site for binding GDF15 or a GDF15 receptor.
  • Exemplary anti-GDF15 antibodies are described, for example, in U.S. Patent Publication No. US 2014-0193427-A1, the disclosure of which is incorporated by reference herein for all purposes.
  • Exemplary anti-GDF15 antibodies useful in the methods and compositions of the invention may, for example, include a heavy chain variable region comprising any one of the nine sets of CDR H1 , CDR H2 , and CDR H3 region sequences set forth in Table 1 below.
  • Exemplary anti-GDF15 antibodies useful in the methods and compositions of the invention may, for example, include a light chain variable region comprising any one of the four sets of CDR L1 , CDR L2 , and CDR L3 region sequences set forth in Table 2 below.
  • anti-GDF-15 antibodies useful in the practice of the invention are described in U.S. Patent Publication No. US 2014-0193427-A1, including 01G06, 03G05, 04F08, 06C11, 08G01, 14F11, 17B11, as well as human or humanized forms thereof.
  • the antibodies disclosed herein e.g., 01G06, 03G05, 04F08, 06C11, 08G01, 14F11, or 17B11, or humanized forms thereof
  • the antibodies reverse a symptom or characteristic of CHF or another cardiac-related disease or disorder by at least 2%, 5%, 10%, 15%, 20%, 25%, 30% or 35%.
  • an anti-GDF-15 antibody useful in the practice of the invention is referred to as 01G06 in U.S. Patent Publication No. US 2014-0193427-A1.
  • Humanized forms of the 01G06 antibody are listed below together with the amino acid sequences of their respective heavy and light chain variable regions.
  • Exemplary humanized anti-GDF-15 antibodies include: Hu01G06-1; Hu01G06-46; Hu01G06-52; Hu01G06-100; Hu01G06-101; Hu01G06-102; Hu01G06-103; Hu01G06-104; Hu01G06-105; Hu01G06-106; Hu01G06-107; Hu01G06-108; Hu01G06-109; Hu01G06-110; Hu01G06-111; Hu01G06-112; Hu01G06-113; Hu01G06-114; Hu01G06-122; Hu01G06-127; Hu01G06-135; Hu01G06-138; Hu01G06-146; Hu06C11-1; Hu06C11-27; Hu06C11-30; Hu14F11-1; Hu14F11-23; Hu14F11-24; Hu14F11-39; and Hu14F11-47.
  • the amino acid sequences for the heavy chain and light chain for each of the aforementioned antibodies is set forth below in Table 3.
  • SEQ ID NO: 25 1 diqmtqspas lsasvgetvt itcrtsenlh nylawyqqkq gkspqllvyd aktladgvps 61 rfsgsgsgtq yslkinslqp edfgsyycqh fwsspytfgg gtkleikrad aaptvsifpp 121 sseqltsgga svvcflnnfy pkdinvkwki dgserqngvl nswtdqdskd stysmsstlt 181 ltkdeyerhn sytceathkt stspivksfn rnec SEQ ID NO: 26 1 diqmtqspas lsasvgetvt itcrtsenlh nylawyqqkq gkspq
  • the antibody may be a neutralizing antibody, which reduces GDF15 activity.
  • the antibody may reduce GDF15 activity in an in vivo assay (see, e.g., Johnen et al., 2007, N ATURE M EDICINE 13:1333-1340) by at least 10%, preferably 20%, 30% or 40%, and more preferably at least about 50%, 60%, 80% or 90% of GDF15 compared to GDF15 activity measured in the same assay under the same conditions in the absence of the antibody.
  • the antibody may selectively and/or significantly reduce or inhibit the binding of GDF15 to its endogenous receptor.
  • the term “significantly reduces or inhibits binding” of GDF15 to its receptor is understood to mean that the antibody inhibits GDF15 binding with a potency or percent inhibition that measures at least 10%, preferably 20%, 30% or 40%, and more preferably at least about 50%, 60%, 80% or 90% of GDF15 (serum level/activity) in the absence of said antibody. Binding can be measured using a direct or sandwich enzyme-linked immunosorbent assay (ELISA), as described, e.g., in Tsai et al., 2013, PLOS O NE, 8:e55174.
  • ELISA enzyme-linked immunosorbent assay
  • the term “selectively” in the context of an antibody that binds to GDF15 or GDF15 receptor is understood to mean that the antibody binds GDF15 or a GDF15 receptor with a binding affinity that is at least two, three, four, five or ten times greater than that of a functionally unrelated protein or another member of the TGF- ⁇ superfamily or a receptor of a member of the TGF- ⁇ superfamily.
  • each humanized antibody has the same or substantially the same affinity for the antigen as the non-humanized mouse antibody from which it was derived.
  • chimeric proteins are created in which mouse immunoglobulin constant regions are replaced with human immunoglobulin constant regions. See, e.g., Morrison et al., 1984, P ROC. N AT. A CAD. S CI. 81:6851-6855, Neuberger et al., 1984, N ATURE 312:604-608; U.S. Pat. Nos. 6,893,625 (Robinson); 5,500,362 (Robinson); and 4,816,567 (Cabilly).
  • the CDRs of the light and heavy chain variable regions are grafted into frameworks from another species.
  • murine CDRs can be grafted into human FRs.
  • the CDRs of the light and heavy chain variable regions of an anti-GDF15 antibody are grafted into human FRs or consensus human FRs.
  • consensus human FRs FRs from several human heavy chain or light chain amino acid sequences are aligned to identify a consensus amino acid sequence. CDR grafting is described in U.S. Pat. Nos.
  • human CDR sequences are chosen from human germline genes, based on the structural similarity of the human CDRs to those of the mouse antibody to be humanized. See, e.g., U.S. Pat. No. 6,881,557 (Foote); and Tan et al., 2002, J. I MMUNOL. 169:1119-1125.
  • ACTIVMABTM technology Vaccinex, Inc., Rochester, N.Y.
  • ACTIVMABTM technology Vaccinex, Inc., Rochester, N.Y.
  • High levels of combinatorial diversity of IgG heavy and light chains are said to be produced. See, e.g., U.S. Pat. Nos. 6,706,477 (Zauderer); 6,800,442 (Zauderer); and 6,872,518 (Zauderer).
  • HUMAN ENGINEERINGTM technology Another approach for modifying a mouse antibody into a form suitable for medical use in humans is HUMAN ENGINEERINGTM technology, which is practiced commercially by XOMA (US) LLC. See, e.g., PCT Publication No. WO 93/11794 and U.S. Pat. Nos. 5,766,886 (Studnicka); 5,770,196 (Studnicka); 5,821,123 (Studnicka); and 5,869,619 (Studnicka).
  • Any suitable approach including any of the above approaches, can be used to reduce or eliminate human immunogenicity of an antibody.
  • Fully human mAbs lacking any non-human sequences can be prepared from human immunoglobulin transgenic mice by techniques referenced in, e.g., Lonberg et al., N ATURE 368:856-859, 1994; Fishwild et al., N ATURE B IOTECHNOLOGY 14:845-851, 1996; and Mendez et al., N ATURE G ENETICS 15:146-156, 1997.
  • Fully human mAbs can also be prepared and optimized from phage display libraries by techniques referenced in, e.g., Knappik et al., J. M OL. B IOL. 296:57-86, 2000; and Krebs et al., J. I MMUNOL. M ETH. 254:67-84 2001).
  • variants and derivatives of GDF15 that act as decoys can be useful in the practice of the invention. For example, through deletion analysis, it may be possible to identify smaller biologically active fragments of GDF15 that compete with endogenous GDF15 for its cognate receptor. Similarly, it is possible to create soluble biologically active fragments of the GDF15 receptor that compete with endogenous GDF15 receptor for available GDF.
  • biologically active fragments include, but are not limited to, fragments of a naturally-occurring GDF15 (or homolog) or a GDF15 receptor (or homolog) that compete with endogenous GDF15 or an endogenous GDF15 receptor, respectively, for binding to a cognate binding partner (e.g., GDF15 receptor or GDF15, respectively).
  • antisense nucleic acids DNA and RNA
  • small interfering nucleic acids e.g., siRNAs
  • siRNA inhibitors of GDF15 include siRNAs from Santa Cruz Biotech (Catalog No. sc-39799, targeting mouse GDF15; and Catalog No. sc-39798, targeting human GDF15), siRNAs from Life Technologies (Cat. Nos. AM16708, 4392420, and 1299001, targeting human GDF15; and Cat. Nos. 1320001 and 4390771, targeting mouse GDF15; and Cat. Nos. 1330001 and 4390771, targeting rat GDF15), siRNAs from Fisher Scientific (Catalog No.
  • compositions containing GDF15 modulators such as those disclosed herein, can be formulated into dosage forms or dosage units using standard formulation techniques. However, the pharmaceutical composition should be formulated to be compatible with its intended route of administration.
  • compositions described herein can be administered to a subject via any route, including, but not limited to, intravenous (e.g., by infusion pumps), intraperitoneal, intraocular, intra-arterial, intrapulmonary, oral, inhalation, intravesicular, intramuscular, intra-tracheal, subcutaneous, intraocular, intrathecal, transdermal, transpleural, intraarterial, topical, inhalational (e.g., as mists of sprays), mucosal (such as via nasal mucosa), subcutaneous, transdermal, gastrointestinal, intraarticular, intracistemal, intraventricular, rectal (i.e., via suppository), vaginal (i.e., via pessary), intracranial, intraurethral, intrahepatic, and intratumoral.
  • intravenous e.g., by infusion pumps
  • intraperitoneal intraocular, intra-arterial, intrapulmonary, oral, inhalation, intravesicular, intramuscular
  • compositions are administered systemically (for example by intravenous injection). In some embodiments, the compositions are administered locally (for example by intraarterial or intraocular injection).
  • a preferred route of administration for GDF15 modulators, such as an antibody, is via intravenous infusion.
  • Formulation components suitable for parenteral administration include a sterile diluent such as bacteriostatic water for injection, physiological saline, fixed oils, polyethylene glycols, glycerine, propylene glycol or other synthetic solvents; antibacterial agents such as benzyl alcohol or methyl paraben; antioxidants such as ascorbic acid or sodium bisulfite; chelating agents such as EDTA; buffers such as acetates, citrates or phosphates; and agents for the adjustment of tonicity such as sodium chloride or dextrose.
  • a sterile diluent such as bacteriostatic water for injection, physiological saline, fixed oils, polyethylene glycols, glycerine, propylene glycol or other synthetic solvents
  • antibacterial agents such as benzyl alcohol or methyl paraben
  • antioxidants such as ascorbic acid or sodium bisulfite
  • chelating agents such as EDTA
  • buffers such as acetates, citrates
  • the carrier should be stable under the conditions of manufacture and storage, and should be preserved against microorganisms.
  • the composition e.g., an antibody
  • the composition is lyophilized, and then reconstituted in buffered saline, at the time of administration.
  • the composition e.g., an antibody
  • a pharmaceutically acceptable carrier means buffers, carriers, and excipients suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio.
  • the carrier(s) should be “acceptable” in the sense of being compatible with the other ingredients of the formulations and not deleterious to the recipient.
  • Pharmaceutically acceptable carriers include buffers, solvents, dispersion media, coatings, isotonic and absorption delaying agents, and the like, that are compatible with pharmaceutical administration. The use of such media and agents for pharmaceutically active substances is known in the art.
  • compositions preferably are sterile. Sterilization can be accomplished, for example, by filtration through sterile filtration membranes. Where the composition is lyophilized, filter sterilization can be conducted prior to or following lyophilization and reconstitution.
  • a therapeutically effective amount of active component is in the range of 0.1 mg/kg to 100 mg/kg, e.g., 1 mg/kg to 100 mg/kg, 1 mg/kg to 10 mg/kg.
  • the amount administered will depend on variables such as the type and extent of disease or indication to be treated, the overall health of the patient, the in vivo potency of the composition (e.g., an antibody), the pharmaceutical formulation, and the route of administration.
  • the initial dosage can be increased beyond the upper level in order to rapidly achieve the desired blood-level or tissue-level. Alternatively, the initial dosage can be smaller than the optimum, and the daily dosage may be progressively increased during the course of treatment.
  • Human dosage can be optimized, e.g., in a conventional Phase I dose escalation study designed to run from 0.5 mg/kg to 20 mg/kg.
  • Dosing frequency can vary, depending on factors such as route of administration, dosage amount, serum half-life of the composition (e.g., an antibody), and the disease being treated. Exemplary dosing frequencies are once per day, once per week and once every two weeks.
  • the optimal effective amount of the compositions can be determined empirically and will depend on the type and severity of the disease, route of administration, disease progression and health, mass and body area of the subject. Such determinations are within the skill of one in the art.
  • Examples of dosages of GDF15 modulator molecules which can be used for methods described herein include, but are not limited to, an effective amount within the dosage range of any of about 0.01 ⁇ g/kg to about 300 mg/kg, or within about 0.1 ⁇ g/kg to about 40 mg/kg, or with about 1 ⁇ g/kg to about 20 mg/kg, or within about 1 ⁇ g/kg to about 10 mg/kg.
  • the composition when administered subcutaneously, may be administered at low microgram ranges, including for example about 0.1 ⁇ g/kg or less, about 0.05 ⁇ g/kg or less, or 0.01 ⁇ g/kg or less.
  • the amount of GDF15 modulators administered to a subject is about 10 ⁇ g to about 500 mg per dose, including for example any of about 10 ⁇ g to about 50 ⁇ g, about 50 ⁇ g to about 100 ⁇ g, about 100 ⁇ g to about 200 ⁇ g, about 200 ⁇ g to about 300 ⁇ g, about 300 ⁇ g to about 500 ⁇ g, about 500 ⁇ g to about 1 mg, about 1 mg to about 10 mg, about 10 mg to about 50 mg, about 50 mg to about 100 mg, about 100 mg to about 200 mg, about 200 mg to about 300 mg, about 300 mg to about 400 mg, or about 400 mg to about 500 mg per dose.
  • a GDF15 modulator is administered at a dose from about 0.025 mg to about 4 mg, from about 0.035 mg to about 2 mg, from about 0.05 mg to about 2 mg, from about 0.1 mg to about 2 mg, from about 0.2 mg to about 1 mg, or from about 0.2 mg to about 0.8 mg of the GDF15 modulator can be administered.
  • 0.5 mg of GDF15 modulator is administered locally.
  • from about 0.05 mg to about 2 mg, from about 0.2 mg to about 2 mg, from about 0.05 mg to about 1.5 mg, from about 0.15 mg to about 1.5 mg, from about 0.4 mg to about 1 mg, or from about 0.5 mg to about 0.8 mg of GDF15 modulator is administered locally.
  • the GDF15 modulator compositions may be administered in a single daily dose, or the total daily dose may be administered in divided dosages of two, three, or four times daily.
  • the compositions can also be administered less frequently than daily, for example, six times a week, five times a week, four times a week, three times a week, twice a week, once a week, once every two weeks, once every three weeks, once a month, once every two months, once every three months, or once every six months.
  • the compositions may also be administered in a sustained release formulation, such as in an implant which gradually releases the composition for use over a period of time, and which allows for the composition to be administered less frequently, such as once a month, once every 2-6 months, once every year, or even a single administration.
  • the sustained release devices (such as pellets, nanoparticles, microparticles, nanospheres, microspheres, and the like) may be administered by injection or surgical implanted in various locations in the body.
  • the dosing of the GDF15 modulator is titrated such that the dose is sufficient to reduce or prevent adverse effects, but yet fully or partially inhibit the activity of the GDF15.
  • the activity of GDF15 can be modulated in a target cell using antisense nucleic acids or small interfering nucleic acids. Modulation can be achieved using expression constructs known in the art, e.g., naked DNA constructs, DNA vector based constructs, and/or viral vector and/or viral based constructs to express nucleic acids encoding an anti-GDF15 siRNA or antisense molecule.
  • DNA constructs and the therapeutic use of such constructs are well known to those of skill in the art (see, e.g., Chiarella et al., 2008, R ECENT P ATENTS A NTI -I NFECT. D RUG D ISC., 3:93-101; Gray et al., 2008, E XPERT O PIN. B IOL. T HER., 8:911-922; Melman et al., 2008, H UM. G ENE T HER., 17:1165-1176).
  • Naked DNA constructs typically include one or more therapeutic nucleic acids (e.g., GDF15 modulators) and a promoter sequence.
  • a naked DNA construct can be a DNA vector, commonly referred to as pDNA.
  • naked DNA typically do not integrate into chromosomal DNA.
  • naked DNA constructs do not require, or are not used in conjunction with, the presence of lipids, polymers, or viral proteins.
  • Such constructs may also include one or more of the non-therapeutic components described herein.
  • DNA vectors are known in the art and typically are circular double stranded DNA molecules. DNA vectors usually range in size from three to five kilo-base pairs (e.g., including inserted therapeutic nucleic acids). Like naked DNA, DNA vectors can be used to deliver and express one or more therapeutic proteins in target cells. DNA vectors do not integrate into chromosomal DNA.
  • DNA vectors include at least one promoter sequence that allows for replication in a target cell. Uptake of a DNA vector may be facilitated by combining the DNA vector with, for example, a cationic lipid, and forming a DNA complex.
  • viral vectors are double stranded circular DNA molecules that are derived from a virus. Viral vectors typically are larger in size than naked DNA and DNA vector constructs and have a greater capacity for the introduction of foreign (i.e., not virally encoded) genes. Like naked DNA and DNA vectors, viral vectors can be used to deliver and express one or more therapeutic nucleic acids in target cells. Unlike naked DNA and DNA vectors, certain viral vectors stably incorporate themselves into chromosomal DNA.
  • viral vectors include at least one promoter sequence that allows for replication of one or more vector encoded nucleic acids, e.g., a therapeutic nucleic acid, in a host cell.
  • Viral vectors may optionally include one or more non-therapeutic components described herein.
  • uptake of a viral vector into a target cell does not require additional components, e.g., cationic lipids. Rather, viral vectors transfect or infect cells directly upon contact with a target cell.
  • the approaches described herein include the use of retroviral vectors, adenovirus-derived vectors, and/or adeno-associated viral vectors as recombinant gene delivery systems for the transfer of exogenous genes in vivo, particularly into humans. Protocols for producing recombinant retroviruses and for infecting cells in vitro or in vivo with such viruses can be found in C URRENT P ROTOCOLS IN M OLECULAR B IOLOGY, Ausubel, F. M. et al. (eds.) Greene Publishing Associates, (1989), Sections 9.10-9.14, and other standard laboratory manuals.
  • Viruses that are used as transduction agents of DNA vectors and viral vectors such as adenoviruses, retroviruses, and lentiviruses may be used in practicing the present invention.
  • Illustrative retroviruses include, but are not limited to: Moloney murine leukemia virus (M-MuLV), Moloney murine sarcoma virus (MoMSV), Harvey murine sarcoma virus (HaMuSV), murine mammary tumor virus (MuMTV), gibbon ape leukemia virus (GaLV), feline leukemia virus (FLV), spumavirus, Friend murine leukemia virus, Murine Stem Cell Virus (MSCV) and Rous Sarcoma Virus (RSV)) and lentivirus.
  • M-MuLV Moloney murine leukemia virus
  • MoMSV Moloney murine sarcoma virus
  • Harvey murine sarcoma virus HaMuSV
  • murine mammary tumor virus
  • lentivirus refers to a group (or genus) of complex retroviruses.
  • Illustrative lentiviruses include, but are not limited to: HIV (human immunodeficiency virus; including HIV type 1, and HIV type 2); visna-maedi virus (VMV) virus; the caprine arthritis-encephalitis virus (CAEV); equine infectious anemia virus (EIAV); feline immunodeficiency virus (FIV); bovine immune deficiency virus (BIV); and simian immunodeficiency virus (SIV).
  • HIV human immunodeficiency virus
  • VMV visna-maedi virus
  • CAEV caprine arthritis-encephalitis virus
  • EIAV equine infectious anemia virus
  • FV feline immunodeficiency virus
  • BIV bovine immune deficiency virus
  • SIV simian immunodeficiency virus
  • an adenovirus can be used in accordance with the methods described herein.
  • the genome of an adenovirus can be manipulated such that it encodes and expresses a gene product of interest but is inactivated in terms of its ability to replicate in a normal lytic viral life cycle.
  • Suitable adenoviral vectors derived from the adenovirus strain Ad type 5 d1324 or other strains of adenovirus are known to those skilled in the art.
  • Recombinant adenoviruses can be advantageous in certain circumstances in that they are not capable of infecting nondividing cells and can be used to infect a wide variety of cell types, including epithelial cells
  • the virus particle is relatively stable and amenable to purification and concentration, and as above, can be modified so as to affect the spectrum of infectivity.
  • introduced adenoviral DNA (and foreign DNA contained therein) is not integrated into the genome of a host cell but remains episomal, thereby avoiding potential problems that can occur as a result of insertional mutagenesis in situ where introduced DNA becomes integrated into the host genome (e.g., retroviral DNA).
  • the carrying capacity of the adenoviral genome for foreign DNA is large (up to 8 kilobases) relative to other gene delivery vectors.
  • Adeno-associated virus is a naturally occurring defective virus that requires another virus, such as an adenovirus or a herpes virus, as a helper virus for efficient replication and a productive life cycle. It is also one of the few viruses that may integrate its DNA into non-dividing cells, and exhibits a high frequency of stable integration.
  • one or more viral vectors that expresses a therapeutic transgene or transgenes encoding a GDF15 modulator is administered by direct injection to a cell, tissue, or organ of a subject, in vivo.
  • cells are transduced in vitro or ex vivo with such a vector encapsulated in a virus, and optionally expanded ex vivo. The transduced cells are then administered to the subject.
  • Cells suitable for transduction include, but are not limited to stem cells, progenitor cells, and differentiated cells.
  • the transduced cells are embryonic stem cells, bone marrow stem cells, umbilical cord stem cells, placental stem cells, mesenchymal stem cells, neural stem cells, liver stem cells, pancreatic stem cells, cardiac stem cells, kidney stem cells, or hematopoietic stem cells.
  • host cells transduced with viral vector of the invention that expresses one or more polypeptides are administered to a subject to treat and/or prevent an auditory disease, disorder, or condition.
  • Other methods relating to the use of viral vectors can be found in, e.g., Kay, 1997, C HEST, 111 (6 Supp.):138S-142S; Ferry et al., 1998, H UM. G ENE T HER., 9:1975-81; Shiratory et al., 1999, L IVER, 19:265-74; Oka et al., 2000, C URR. O PIN.
  • Certain embodiments of the invention provide conditional expression of a polynucleotide of interest.
  • expression is controlled by subjecting a cell, tissue, organism, etc., to a treatment or condition that causes the polynucleotide to be expressed or that causes an increase or decrease in expression of the polynucleotide encoded by the polynucleotide of interest.
  • inducible promoters/systems include, but are not limited to, steroid-inducible promoters such as promoters for genes encoding glucocorticoid or estrogen receptors (inducible by treatment with the corresponding hormone), metallothionine promoter (inducible by treatment with various heavy metals), MX-1 promoter (inducible by interferon), the “GeneSwitch” mifepristone-regulatable system (Sirin et al., 2003, G ENE, 323:67), the cumate inducible gene switch (WO 2002/088346), tetracycline-dependent regulatory systems, etc.
  • steroid-inducible promoters such as promoters for genes encoding glucocorticoid or estrogen receptors (inducible by treatment with the corresponding hormone), metallothionine promoter (inducible by treatment with various heavy metals), MX-1 promoter (inducible by interferon), the “GeneSwitch”
  • Conditional expression can also be achieved by using a site specific DNA recombinase.
  • the vector comprises at least one (typically two) site(s) for recombination mediated by a site specific recombinase.
  • recombinase or “site specific recombinase” include excisive or integrative proteins, enzymes, co-factors or associated proteins that are involved in recombination reactions involving one or more recombination sites (e.g., two, three, four, five, seven, ten, twelve, fifteen, twenty, thirty, fifty, etc.), which may be wild-type proteins (see Landy, 1993, C URRENT O PINION IN B IOTECHNOLOGY, 3:699-707), or mutants, derivatives (e.g., fusion proteins containing the recombination protein sequences or fragments thereof), fragments, and variants thereof.
  • Illustrative examples of recombinases suitable for use in particular embodiments of the present invention include, but are not limited to: Cre, Int, IHF, Xis, Flp, Fis, Hin, Gin, OC31, Cin, Tn3 resolvase, TndX, XerC, XerD, TnpX, Hjc, Gin, SpCCE1. and ParA.
  • the vectors may comprise one or more recombination sites for any of a wide variety of site specific recombinases. It is to be understood that the target site for a site specific recombinase is in addition to any site(s) required for integration of a vector (e.g., a retroviral vector or lentiviral vector).
  • a vector e.g., a retroviral vector or lentiviral vector.
  • vectors comprise a selection gene, also termed a selectable marker.
  • selection genes encode proteins that (a) confer resistance to antibiotics or other toxins, e.g., ampicillin, neomycin, hygromycin, methotrexate, Zeocin, Blastocidin, or tetracycline, (b) complement auxotrophic deficiencies, or (c) supply critical nutrients not available from complex media, e.g., the gene encoding D-alanine racemase for Bacilli. Any number of selection systems may be used to recover transformed cell lines.
  • herpes simplex virus thymidine kinase (Wigler et al., 1977, C ELL, 11:223-232) and adenine phosphoribosyltransferase (Lowy et al., 1990, C ELL, 22:817-823) genes which can be employed in tk- or aprt-cells, respectively.
  • DNA delivery may occur parenterally, intravenously, intramuscularly, or even intraperitoneally as described, for example, in U.S. Pat. Nos. 5,543,158; 5,641,515; and 5,399,363 (each specifically incorporated herein by reference in its entirety).
  • Solutions of the active compounds as free base or pharmacologically acceptable salts may be prepared in water suitably mixed with a surfactant, such as hydroxypropylcellulose.
  • Dispersions may also be prepared in glycerol, liquid polyethylene glycols, and mixtures thereof and in oils. Under ordinary conditions of storage and use, these preparations contain a preservative to prevent the growth of microorganisms.
  • DNA delivery may occur by use of liposomes, nanocapsules, microparticles, microspheres, lipid particles, vesicles, optionally mixing with cell penetrating polypeptides, and the like, for the introduction of the compositions of the present invention into suitable host cells.
  • the compositions of the present invention may be formulated for delivery either encapsulated in a lipid particle, a liposome, a vesicle, a nanosphere, a nanoparticle or the like.
  • the formulation and use of such delivery vehicles can be carried out using known and conventional techniques.
  • Exemplary formulations for ex vivo DNA delivery may also include the use of various transfection agents known in the art, such as calcium phosphate, electroporation, heat shock and various liposome formulations (i.e., lipid-mediated transfection).
  • various transfection agents known in the art, such as calcium phosphate, electroporation, heat shock and various liposome formulations (i.e., lipid-mediated transfection).
  • Particular embodiments of the invention may comprise other formulations, such as those that are well known in the pharmaceutical art, and are described, for example, in R EMINGTON: T HE S CIENCE AND P RACTICE OF P HARMACY, 20th Edition. Baltimore, Md. Lippincott Williams & Wilkins, 2000.
  • GDF15 activity is inhibited by contacting a body fluid with a composition comprising a GDF15 modulator ex vivo under conditions that permit the GDF15 modulators to reduce or inhibit GDF15 activity.
  • Suitable body fluids include those that can be returned to the individual, such as blood, plasma, or lymph.
  • Affinity adsorption apheresis is described generally in Nilsson et al., 1988, B LOOD, 58(1):38-44; Christie et al., 1993, T RANSFUSION, 33:234-242; Richter et al., 1997, ASAIO J., 43(1):53-59; Suzuki et al., 1994, A UTOIMMUNITY, 19: 105-112; U.S. Pat. No. 5,733,254; Richter et al., 1993, M ETABOL. C LIN. E XP., 42:888-894; and Wallukat et al., 1996, I NT'L J. C ARD., 54:1910195.
  • the invention includes methods of treating one or more diseases described herein in a subject comprising treating the subject's blood extracoporeally (i.e., outside the body or ex vivo) with a composition comprising a GDF15 modulator under conditions that permit the modulator to reduce or inhibit GDF15 activity in the blood of the subject.
  • FIGS. 1-6 Samples of plasma from 245 subjects were examined, and the results are summarized in FIGS. 1-6 .
  • GDF15 was assessed at a 1:50 plasma dilution with the DuoSet ELISA Development Kit (R&D Systems, #DY957) according to the manufacturer's recommendation.
  • the inter-assay coefficient of variation (CV) was 5.6%, and the intra-assay CV was 2.9%.
  • Average GDF15 levels increased with increased severity of CHF ( FIG. 2 ).
  • TSAT total saturation of transferrin
  • FIGS. 6A, 6B and 6C Analysis of renal function markers in 200 subjects with CHF demonstrate that levels of urea, uric acid and creatinine all increased (increased renal impairment) with increased GDF15 levels ( FIGS. 6A, 6B and 6C ), while glomerular filtration rate (GFR), a measure of kidney function, decreased with increased GDF15 levels ( FIG. 6D ).
  • GFR glomerular filtration rate
  • This Example demonstrates the treatment of cardiac hypotrophy (as indicated by heart weight loss) with an anti-GDF15 antibody 01G06 in an HT-1080 fibrosarcoma xenograft model.
  • HT-1080 cells were grown in culture at 37° C. in an atmosphere containing 5% CO 2 , using Eagle's Minimum Essential Medium (ATCC, Catalog No. 30-2003) containing 10% FBS. Cells were inoculated subcutaneously into the flank of 8-week old female ICR SCID mice with 5 ⁇ 10 6 cells per mouse in 50% matrigel. Body weight was measured daily. When body weight reached 80%, the mice were randomized into two groups of five mice each. Each group received one of the following treatments: murine IgG control (“mIgG”), or 01G06 dosed at 2 mg/kg on day 1 and day 7, via intra-peritoneal injection. Treatment with antibody 01G06 resulted in body weight increase to initial weight or 100% (p ⁇ 0.001) ( FIG. 7A ).
  • mIgG murine IgG control
  • 01G06 Treatment with antibody 01G06 resulted in body weight increase to initial weight or 100% (p ⁇ 0.001) ( FIG. 7A ).
  • FIGS. 7A-B indicate that administration of the anti-GDF15 antibody can reverse heart weight loss in an HT-1080 fibrosarcoma xenograft model.
  • mice were sacrificed at the time of dosing (baseline or 80% body weight loss, without treatment) and at the end of study (seven days post dose, either mIgG or 01G06). Liver, heart, spleen, kidney, gonadal fat and the gastrocnemius muscles were removed surgically and weighed. As shown in FIG. 7B , a significant loss in liver, heart, spleen, kidney, gonadal fat and gastrocnemius muscle mass was observed seven days post dose with mIgG, but not in the group treated with antibody 01G06.
  • mice A reproducible transverse aortic constriction of 65-70% is made in mice, as described in Rockman et al., 1991, P ROC. N ATL A CAD. S CI., 88:8277-8291.
  • the animals are extubated and allowed to recover, and blood pressure in the left and right carotids is measured. Animals then are dosed with either an anti-GDF15 antibody or control. After seven days, heart size and weight are assessed for the existence and/or extent of cardiac hypertrophy.
  • mice An aortocaval shunt is implanted in mice, as described in Scheuermann-Freestone et al., 2001, E UR. J. H EART F AILURE, 3:535-543. Animals are dosed with either an anti-GDF15 antibody or control. After thirty days, animals are assessed for mortality, development of myocardial hypertrophy, hemodynamic parameters, and expression levels of BNP-mRNA.
  • Subjects exhibiting cardiac hypotrophy who have previously been treated with known cardiac interventions, but who exhibit at least one characteristic of congestive heart failure, are dosed with anti-GDF15 antibody. Treatment with anti-GDF15 antibody lasts for a duration of three months, during which heart size, peak VO 2 , troponin levels and BNP levels are monitored at regular intervals.

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