Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K38/00—Medicinal preparations containing peptides
  • A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
  • A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
  • A61K38/22—Hormones
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
  • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P21/00—Drugs for disorders of the muscular or neuromuscular system
• • 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

Definitions

• the present invention relates to the medical field and in particular to the area of heart disease, diseases that affect the heart and cardiovascular system, and the skeletal system.
• Cardiac and cardiovascular diseases include left ventricular hypertrophy, coronary artery disease, essential hypertension, acute hypertensive emergency, cardiomyopathy, heart insufficiency, exercise tolerance, chronic heart failure, arrhythmia, cardiac dysrhythmia, syncopy, atheroschlerosis, mild chronic heart failure, angina pectoris, cardiac bypass reocclusion, intermittent claudication (atheroschlerosis oblitterens), diastolic dysfunction and systolic dysfuntion.
• Abnormal Na+/K+-ATPase enzyme, or sodium pump, activity has been postulated to be involved in the pathophysiology of several diseases, including cardiac and cardiovascular diseases, among others. These complex effects may be related to the role of the pump in controlling the cellular ingress of other molecules.
• the Na+/K+-ATPase enzyme is a membrane protein responsible for establishing an electrochemical gradient of Na+ and K+ ions across the plasma membrane of mammalian cells.
• the ion gradient formed by this enzyme is necessary for the active transport of essential nutrients into the cells, for regulation of osmotic balance and cell volume, and for maintaining the resting membrane potential in excitable cells.
• the Na+/K+-ATPase enzyme is the only known receptor for cardiac glycosides such as digitalis.
• SPIs sodium pump inhibitors
• Human amylin is a 37 amino acid peptide hormone that is co-secreted with insulin from pancreatic ⁇ -cells in response to nutrient stimuli. Human amylin has the following amino acid sequence:
• Amylin is believed to regulate gastric emptying, and suppress glucagon secretion and food intake, thus regulating the rate of glucose appearance in the circulation. It appears to complement the actions of insulin, which regulates the rate of glucose disappearance from the circulation and its uptake by peripheral tissues.
• amylin complements the effects of insulin in postprandial glucose control by at least three independent mechanisms, all of which affect the rate of glucose appearance.
• amylin suppresses postprandial glucagon secretion.
• patients with type 1 diabetes have no circulating amylin and patients with type 2 diabetes have diminished postprandial amylin concentrations.
• infusion of an amylin specific monoclonal antibody, which bound circulating amylin again resulted in greatly elevated glucagon concentrations relative to controls. Both of these results point to a physiological role of endogenous amylin in the regulation of postprandial glucagon secretion.
• amylin slows gastrointestinal motility and gastric emptying.
• intrahypothalamic injections of rat amylin were shown to reduce feeding in rats and alter neurotransmitter metabolism in the hypothalamus.
• food intake was significantly reduced for up to eight hours following the intrahypothalamic injection of rat amylin and rat CGRP.
• an amylin analog, pramlintide has been shown to reduce weight or weight gain.
• Amylin may be beneficial in treating metabolic conditions such as diabetes and obesity.
• Amylin may also be used to treat pain, bone disorders, gastritis, to modulate lipids, in particular triglycerides, or to affect body composition such as the preferential loss of fat and sparing of lean tissue.
• amylin and its agonists may have a cardioprotective, myoprotective effect, or both.
• the present invention relates generally to methods for cardioprotection, myoprotection, or both by administration of amylin or amylin agonists.
• the present invention describes methods for ameliorating, treating, or preventing cardiac or cardiovascular diseases, or both cardiac and cardiovascular diseases comprising administering a therapeutically effective amount of an amylin or an amylin agonist.
• the present invention describes methods for reducing, preventing, or delaying the onset of the mortality, morbidity, or both associated with heart disease comprising administering a therapeutically effective amount of an amylin or an amylin agonist. Methods are provided for the use of amylin and amylin agonists as a cardioprotective agent.
• the present invention describes methods for promoting or increasing the health of the heart comprising administering a therapeutically effective amount of an amylin or an amylin agonist.
• the present invention describes methods for ameliorating, treating, preventing, or delaying the onset of cardiovascular disease or cardiac death by affecting the Na+/K+-ATPase transport system, hi still another general aspect, the present invention describes methods for promoting heart health by affecting the Na+/K+-ATPase transport system.
• the present invention involves the amylin or amylin agonist stimulating (increasing) the Na+/K+-ATPase transport system.
• the present invention describes methods for ameliorating, treating, preventing or delaying the onset of cardiovascular diseases, or increasing or promoting heart health, by stimulating a Na+/K+-ATPase transport system comprising administering a therapeutically effective amount of an amylin or an amylin agonist to stimulate (increase) the Na+/K+-ATPase.
• an amylin agonist is not a calcitonin gene related peptide (CGRP) or AFP-6 (intermedin) and AFP-6 analogs described in U.S. Provisional Application Serial No. 60/617,468, published as WO2006042242.
• the amylin agonist is not a CGRP analog.
• the amylin agonist is not a CGRP, CGRP agonist, or CGRP analog described in WO2005070444, WO2005070445 or in US Patent application nos. 10/756,490, 10/756,157, or provisional application no. 60/565,056.
• the amylin agonist is an amylin agonist analog.
• the amylin agonist is a small molecule such as that described in WO 2005/025504, incorporated herein by reference.
• an amylin or amylin agonist useful in the methods of the present invention is combined with one or more other active ingredients useful in cardioprotection.
• the compounds may be combined in a unitary dosage form, or in separate dosage forms intended for simultaneous or sequential administration to a patient in need of treatment.
• the compounds may be chemically joined to create a hybrid compound.
• the methods of the invention comprise administration of an angiotensin II antagonist, renin inhibitor, calcium channel blocker and/or additional cardioprotective or myoprotective peptide.
• Figure 1 illustrates the effects of amylin on cumulative VF duration.
• Figure 2 illustrates the effects of amylin on cumulative mortality.
• Figure 3 illustrates the effects of amylin agonist on mortality associated with cardiac events in insulin-treated subjects.
• the present invention generally provides methods for cardioprotection, myoprotection, or both cardioprotection and myoprotection by the administration of an amylin or amylin agonist to a subject.
• cardiac protectionion refers to the amelioration, treatment, or prevention of diseases and conditions of the heart and cardiac tissues, as well as cardiovascular tissues.
• amylin, calcitonin, and their agonists may exert a cardioprotective effect or myoprotective effect on cardiac and skeletal muscle by stimulating Na+/K+-ATPase, also referred to as the sodium pump, via amylin receptors or calcitonin-like receptors or both.
• heart diseases and conditions include, acute and chronic congestive cardiac failure, abnormal contractility, ischemias, ventricular tachyarrhythmias, myocardial infarction, ventricular ectopic beats (VEBs), ventricular tachycardia (VT), ventricular fibrillation (VF), and arrhythmias.
• myoprotection refers to the amelioration, treatment, or prevention of heart diseases and conditions associated with the myocardium.
• diseases and conditions associated with the myocardium include abnormal contractility, ventricular tachyarrhythmias, myocardial infarction, ventricular ectopic beats (VEBs), ventricular tachycardia (VT), ventricular fibrillation (VF), and arrhythmias.
• the methods comprise administration of an amylin or an amylin agonist to a subject.
• the methods comprise administration of an amylin or an amylin agonist to a subject in need of cardioprotection, myoprotection, or both.
• a "subject” may include any mammal, including humans.
• a “subject” may also include pets (e.g., dogs, cats, horses), as well as other valuable animals.
• Subjects who may benefit from the methods of the invention may be those who have or are at risk of having a cardiovascular disease. Further, a subject may be one who is in need of or desirous of experiencing the present methods.
• cardioprotection or myoprotection includes the amelioration, treatment, or prevention of diseases and conditions of the myocardium caused by impaired blood perfusion.
• the diseases and conditions may be caused by ischemic and reperfusion injury.
• the methods protect heart cells from damage, necrosis, or apoptosis during ischemic or reperfusion injury.
• Such methods include the administration of an effective amount of an amylin or amylin agonist to a subject for the protection of heart cells or tissues from such damage.
• the term "effective amount” refers to an amount of a pharmaceutical agent used to treat, ameliorate, prevent, or eliminate the identified condition (e.g., disease or disorder), or to exhibit a detectable therapeutic or preventative effect.
• the effect can be detected by, for example, chemical markers, antigen levels, or time to a measurable event, such as morbidity or mortality.
• Therapeutic effects can include preventing further loss of cardiac myocytes, or improving cardiac myocyte efficiency, or both. Therapeutic effects can also include an improvement in cardiac contractility. Further therapeutic effects can include reduction in physical symptoms of a subject, such as, for example, an increased capacity for physical activity prior to breathlessness.
• the invention is directed to a method of treating cardiovascular and related diseases, for example, hypertension, hypertrophy, arrhythmia, congestive heart failure, myocardial ischemia, heart failure subsequent to myocardial infarction, myocardial infarction, ischemia reperfusion injury, and diseases that arise from thrombotic and prothrombotic states by administering a therapeutically effective amount of an amylin or an amylin agonist.
• cardiovascular and related diseases for example, hypertension, hypertrophy, arrhythmia, congestive heart failure, myocardial ischemia, heart failure subsequent to myocardial infarction, myocardial infarction, ischemia reperfusion injury, and diseases that arise from thrombotic and prothrombotic states by administering a therapeutically effective amount of an amylin or an amylin agonist.
• cardioprotection refers to a state of reduction, amelioration, or prevention of dysrhythmia in a subject.
• the methods include a reduction in fatal dysrhythmia in a subject.
• the methods result in the reduction in dysrhythmia in combination with other improvements in cardiac or myocyte function.
• the methods result in the reduction of dysrhythmia and increases cardiac contractility.
• dysrhythmia includes premature atrial contractions, premature ventricular contractions, atrial fibrillation, atrial flutter, paroxysmal supraventricular tachycardia, accessory pathway tachycardias, AV nodal reentrant tachycardias, ventricular tachycardia, ventricular fibrillation, long QT syndrome, bradyarrhythmias, sinus node dysfunction and heart block.
• dysrhythmia is ameliorated or reduced to an amount that is less than about 1%, 2%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, or 90% of the amount of dysrhythmia in the absence of amylin or amylin agonist administration.
• dysrhythmia can be slightly reduced, moderately reduced, or substantially eliminated, as compared to the dysrhythmia in the absence of administering an amylin or amylin agonist.
• a slight reduction of dysrhythmia refers to dysrhythmia that is decreased by about 25% or less as compared with the occurrence of dysrhythmia in the absence of administering amylin or amylin agonist.
• a moderate reduction in the occurrence of dysrhythmia refers to an occurrence that decreased is by about 50% or less as compared with the occurrence in the absence of administering an amylin or amylin agonist.
• a substantial elimination of dysrhythmia occurrence refers to the occurrence that is decreased by about 90% or more as compared with the occurrence in the absence of administering an amylin or amylin agonist.
• the detection of dysrhythmias can be detected using any method for dysrhythmia detection available to the skilled clinician, including by monitoring a subjects pulse and by electrocardiogram.
• the methods protect the heart muscles from damage that may result from impaired blood perfusion.
• Impaired blood perfusion can result from any cause that results in an impairment of blood perfusion, including, thrombosis, heart failure, myocardial infarction, and reduced contractility.
• the methods of the present invention provide for the re-establishment of contractility, reducing the loss of contractility, improving the contractility, or maintaining contractility in the heart muscle of a subject.
• the cardioprotection is not a result of increased cardiac contractility.
• the methods of the present invention result in the amelioration of myocardial infarct magnitude.
• Infarct magnitude can be measured using any method available to the skill artisan.
• infarct size can be measured using magnetic resonance imaging (MRI).
• MRI magnetic resonance imaging
• myocardial infarct magnitude is ameliorated or reduced to an amount that is less than about 1%, 2%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, or 90% of the amount of myocardial infarct magnitude in the absence of amylin or amylin agonist administration.
• myocardial infarct magnitude can be slightly reduced, moderately reduced, or substantially eliminated, as compared to the magnitude of infarct in the absence of administering an amylin or amylin agonist.
• a slight reduction of myocardial infarct magnitude refers to myocardial infarct magnitude that is decreased by about 25% or less as compared with infarct in the absence of administering amylin or amylin agonist.
• a moderate reduction in myocardial infarct magnitude refers to an infarct magnitude that decreased is by about 50% or less as compared with the magnitude in the absence of administering an amylin or amylin agonist.
• a substantial elimination of an infarct refers to an infarct magnitude that is decreased by about 90% or more as compared with a magnitude in the absence of administering an amylin or amylin agonist.
• the methods of the present invention provide for a reduction in mortality or morbidity as a result of heart disease.
• the methods provide for a reduction in mortality in ischemia and reperfusion events.
• mortality or morbidity or both is reduced or ameliorated to an amount that is less than about 1%, 2%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, or 90% of the amount of mortality or morbidity in the absence of amylin or amylin agonist administration.
• mortality or morbidity can be slightly reduced, moderately reduced, or substantially eliminated, as compared to the mortality or morbidity in the absence of administering an amylin or amylin agonist.
• a slight reduction of mortality or morbidity refers to mortality or morbidity that is decreased by about 25% or less as compared with infarct in the absence of administering amylin or amylin agonist.
• a moderate reduction in mortality or morbidity refers to an mortality or morbidity that decreased is by about 50% or less as compared with the mortality or morbidity in the absence of administering an amylin or amylin agonist.
• a substantial elimination of mortality or morbidity refers to mortality or morbidity that is decreased by about 90% or more as compared with mortality or morbidity in the absence of administering an amylin or amylin agonist.
• the methods of the present disclosure will find use in cardioprotective aspects, as well as in the prevention or treatment of conditions that will benefit from cardioprotection, such as congestive heart failure.
• cardioprotection such as congestive heart failure.
• amylin, calcitonin, or their agonists by acting on heart muscles, may be useful in the treatment of congestive failure and similar conditions that will benefit from cardioprotective and inotropic effects.
• the benefits of these compounds will also be apparent when they act upon compromised skeletal muscle, such as following ischemia, imminent paralysis from a variety of causes, including energy-deficient states and electrolyte disturbance.
• Benefits from restoring contractility of skeletal muscle will be especially manifest, for example, when that skeletal muscle is respiratory, when weaning patients from mechanical ventilation, improving rehabilitation in chronic obstructive pulmonary disease (COPD), and in preventing or treating respiratory acidosis (from hypoventilation) including acute respiratory acidosis which can occur upon an abrupt failure of ventilation, and chronic respiratory acidosis which may be secondary to many disorders, including COPD.
• Chronic respiratory acidosis also may be secondary to obesity hypoventilation syndrome (i.e. Pickwickian syndrome), neuromuscular disorders, such as amyotrophic lateral sclerosis, and severe restrictive ventilatory defects as observed in interstitial fibrosis and thoracic deformities.
• inotropic compounds are cardioprotective or myoprotective.
• drugs with positive inotropic effects can produce short-term symptomatic improvements in patients with heart failure, their long-term use does not prolong survival in patients.
• some positive inotropic agents such as beta agonists (e.g. dobutamine) have been shown to have no effect or a negative impact survival rates.
• beta agonists e.g. dobutamine
• Dobutamine is a direct-acting inotropic agent whose primary activity results from stimulation of the beta-receptors of the heart, hi one study, long-term use of dobutamine lessened the symptoms of congestive heart failure, but did not prolong survival. Pickworth, CHn. Pharm., 11:618-624 (1992).
• inotropic agents that stimulate contractility, yet do not provide cardioprotection, include the oldest cardiotropic drug, digitalis. After adjusting for atrial fibrillation and left ventricular failure, one study found that serum digoxin (digitalis) concentration was not significantly related to survival. Taken together with the results of 3 other large, nonrandomized studies of digitalis treatment after acute myocardial infarction, it appeared that digitalis treatment might indeed have adverse effects on survival. Other examples include milrinone.
• the present invention is directed to amylin or amylin agonists that bind to or act at an amylin and/or calcitonin receptor. It has been reported that the biological actions of amylin family peptide hormones are generally mediated via binding to two closely related type II G protein-coupled receptors (GPCRs), the calcitonin receptor (CTR) (of which there are multiple forms known in the art) and the calcitonin receptor like receptor (CRLR). Cloning and functional studies have shown that CGRP, calcitonin, adrenomedullin, and amylin interact with different combinations of CTR or the CRLR and the receptor activity modifying protein (RAMP). Many cells express multiple RAMPs.
• GPCRs G protein-coupled receptors
• CTR calcitonin receptor
• CRLR calcitonin receptor like receptor
• RAMPs and either the CTR or CRLR is required to generate functional receptors for calcitonin, CGRP, ADM 5 and amylin.
• the RAMP family comprises three members (RAMPl, -2, and -3), which share less then 30% sequence identity, but have a common topological organization.
• Co-expression of CRLR and RAMPl leads to the formation of a receptor for CGRP.
• Co-expression of CRLR and RAMP2 leads to the formation of a receptor for ADM.
• Co-expression of CRLR and RAMP3 leads to the formation of a receptor for ADM and CGRP.
• Co-expression of hCTR2 and RAMPl leads to the formation of a receptor for amylin and CGRP.
• samples and subjects that may be benefited by administration of an amylin or amylin agonist to prevent cardiac damage can be ascertained by the artisan in light of conditions and risk factors related to the sample or subject.
• samples and subjects of the present invention include those which have experienced, are experiencing or are at risk to experience a condition associated with heart disease.
• a condition associated with heart disease can be any condition or disorder in which abnormal Na+/K+-ATPase activity is known to occur or thought to be a risk.
• Conditions associated with abnormal sodium pump activity include, for example, myocardial infarction, ischemia/reperfusion, oxidative stress, advanced glycation endproducts, abnormal cardiac wall tension, sympathetic stimulation, myocarditis, hypertension, and heart transplantation.
• the amylin or amylin agonist may be administered in any manner known in the art that renders amylin or amylin agonist biologically available to the subject or sample in an effective amount.
• the amylin or amylin agonist may be administered to a subject via any central or peripheral route known in the art including, but not limited to: oral, parenteral, transdermal, transniucosal, or pulmonary routes.
• exemplary routes of administration include oral, ocular, rectal, buccal, topical, nasal, ophthalmic, subcutaneous, intramuscular, intraveneous, intracerebral, transdermal, and pulmonary.
• Another embodiment of a route of administration is subcutaneous.
• the amylin or amylin agonist can be administered to a sample via pouring, pipetting, immersing, injecting, infusing, perfusing, or any other means known in the art. Determination of the appropriate administration method is usually made upon consideration of the condition (e.g., disease or disorder) to be treated, the stage of the condition (e.g., disease or disorder), the comfort of the subject, and other factors known to those of skill in the art.
• Administration by the methods of the present invention can be intermittent or continuous, both on an acute and/or chronic basis. Yet another mode of administration of amylin or amylin agonist is continuous. Continuous intravenous or subcutaneous infusion, and continuous transcutaneous infusion are exemplary embodiments of administration for use in the methods of the present invention. Subcutaneous infusions, both acute and chronic, are particularly notable embodiments of administration. [0047] In one embodiment, administration of an amylin or amylin agonist to provide cardioprotection can be a prophylactic treatment, beginning concurrently with the diagnosis of conditions (e.g., disease or disorder) which places a subject at risk of heart dieases, such as for example upon a diagnosis of diabetes.
• conditions e.g., disease or disorder
• administration of an amylin or amylin agonist to prevent heart diseases or conditions can occur subsequent to occurrence of symptoms associated with heart disease.
• administration of an amylin or amylin agonist during the cardiovascular event can limit damage and enhance survival.
• administration of an amylin or amylin agonist can provide cardioprotective measures that can prevent recurrence and long-term cardiovascular related damage.
• administration of amylin or amylin agonist can provide protective measures that can prevent or reduce the severity of an initial cardiovascular event, particularly in those in the general population and in subjects who are at high risk due to an adverse cardiovascular risk profile.
• At risk profiles are well-known in the medical arts. For example, those at risk for and in need of prevention or reduction in severity of a myocardial infarction are known to be those who had antecedent angina, have peripheral artery disease, had a stroke, or had heart failure. [0048] Increasing age is perhaps the most notable risk factor for heart failure. Male and female subjects older than 65 years have a significantly increased incidence of heart failure, and thus increased need for the treatments discussed herein, with male subjects having an even more increased risk. Deteriorating left ventricular function is an important marker for identifying those having increased risk of heart failure.
• Clinical indicators for deteriorating left ventricular function include ECG evidence of left ventricular hypertrophy or a rapid resting heart rate, a low or decreased vital capacity, and radiographic evidence of an enlarged heart. The risk increases when multiple markers are present. Left ventricular hypertrophy by itself increases the risk of heart failure two- to threefold. Additional risk factors for heart failure include elevated systolic blood pressure, increased pulse pressure, angina, a history of myocardial infacrtion, diabetes, and valvular heart disease. Five-year mortality for patients with heart failure is reported at 60% to 75%, with African American men and women having high mortality rates.
• Those subjects in particular need for treatment will have a multivariable risk profile that includes age, sex, ECG record, vital capacity, systolic blood pressure, heart rate, diabetic status, radiographic evidence of cardiomegaly, and the presence of coronary heart disease (CHD) or murmurs.
• CHD coronary heart disease
• Those in even more need will have the multivariable risk profile of heart failure and be predisposed by virtue of the presence of hypertension, coronary or valve disease, or impaired left ventricular systolic function.
• an amylin or amylin agonist will reduce hospital admissions and the length of hospital stay related to cardiovascular events, such as heart failure, congestive heart failure, acute hypertensive emergency, cardiac dysrhythmia, angina pectoris, and cardiac bypass reocclusion.
• the effective amount can be estimated initially either in cell culture assays, e.g., in animal models, such as rat or mouse models. An animal model may also be used to determine the appropriate concentration range and route of administration. Such information can then be used to determine useful doses and routes for administration in humans.
• Efficacy and toxicity may be determined by standard pharmaceutical procedures in cell cultures or experimental animals, e.g., ED 50 (the dose therapeutically effective in 50% of the population) and LD 50 (the dose lethal to 50% of the population).
• the dose ratio between therapeutic and toxic effects is the therapeutic index, and it can be expressed as the ratio, ED50/LD50.
• Pharmaceutical compositions that exhibit large therapeutic indices are one embodiment of interest.
• the data obtained from cell culture assays and animal studies may be used in formulating a range of dosage for human use.
• the dosage contained in such compositions can be within a range of circulating concentrations that include an ED 50 with little or no toxicity.
• the dosage may vary within this range depending upon the dosage form employed, sensitivity of the patient, and the route of administration.
• amylin or amylin agonist may be administered on an acute or chronic basis.
• An acute administration includes a temporary administration for a period of time before, during and/or after the occurrence of a transient event.
• An acute administration generally entails an administration that is indicated by a transient event or condition.
• acute administration may be implicated during an evolving myocardial infarction or during unstable angina.
• Administration before, during, and/or after a percutaneous cardiac intervention ("PCI") also constitutes an example of an acute administration.
• amylin or amylin agonist may be administered acutely before, during and/or after any cardiac surgery, such as open heart surgery, coronary bypass, minimally invasive cardiac surgery, valvuloplasty, or cardiac transplantation.
• amylin or amylin agonist may also be administered acutely on the basis of congestive heart failure following myocardial infarction or surgery.
• Acute administration before, during, and/or after a particular event may begin at any time before the happening of the event (e.g., such as surgery or transplant) and may continue for any length of time, including for an extended period of time after the event, that is useful to prevent or ameliorate cardiac myocyte apoptosis associated with the event.
• the duration of an acute administration can be determined by a clinician in light of the risk of cardiac myocyte apoptosis related to the event or condition.
• Amylin agonists for use in the methods include amylin agonist analogs, examples of which are described in US Pat. 5,686,411; US Pat 6,610,824; US Pat 5,998,367; US Pat 6,087,334; international application PCT/US2005/004631; and WO2006052608, all of which are incorporated herein by reference.
• methods of the invention amylin agonists do not include AFP-6 (intermedin) and novel compounds described in US provisional application no. 60/617,468, filed Oct. 8, 2004, published as WO2006042242.
• the amylin agonists do not include calcitonin.
• the amylin agonists do not include salmon calcitonin. In other embodiments, the amylin agonists do not include CGRP. In still other embodiments, amylin agonists do not include analogs of CGRP or calcitonin. Accordingly, it is contemplated that methods of the invention may include a proviso that excludes CGRP or AFP-6 or calcitonin, or their analogs.
• amylin is meant the human peptide hormone referred to as amylin and secreted from the beta cells of the pancreas, and species variations thereof, as described in U.S. Pat. No. 5,234,906, issued Aug. 10, 1993, for “Hyperglycemic Compositions,” the contents of which are hereby incorporated by reference. More particularly, amyliii is a 37-amino acid polypeptide hormone normally co-secreted with insulin by pancreatic beta cells in response to nutrient intake (see, e.g., Koda et al, Lancet 339:1179-1180, 1992). In this sense, “amylin,” “wild-type amylin,” and “native amylin,” i.e., unmodified amylin, are used interchangeably. Amylin is also sometimes referred to as "IAPP.”
• agonist is meant a compound which elicits a biological activity of amylin, in one embodiment having a potency better than amylin, or within five orders of magnitude (plus or minus) of potency compared to amylin, or 4, 3, 2, or 1 order of magnitude, when evaluated by art- known measures such as receptor binding/competition studies as described herein.
• Agonists include peptide as well as non-peptide compounds.
• the term refers to a compound which elicits a biological effect similar to that of native amylin, for example a compound (1) having activity in a food intake, gastric emptying, pancreatic secretion, or weight loss assay (international application PCT/US2005/004631, filed on Feb. 11, 2005, or in WO2006052608, both incorporated by reference) similar to native human reference peptide, and/or (2) which binds specifically in a reference receptor assay or in a competitive binding assay with amylin.
• a compound (1) having activity in a food intake, gastric emptying, pancreatic secretion, or weight loss assay international application PCT/US2005/004631, filed on Feb. 11, 2005, or in WO2006052608, both incorporated by reference
• the agonists will bind in such assays with an affinity of less than 1 ⁇ M, and in other embodiments can have an affinity of less than 1-5 nM, 500, 100, 50, or 5 pM.
• Such agonists may comprise a polypeptide comprising an active fragment of amylin or a small chemical molecule. It is, however, contemplated that in certain embodiments of the invention, salmon calcitonin, calcitonin, CGRP, AFP-6, and/or their respective analogs may be excluded from 'the scope of amylin agonists for use in the methods of the present invention.
• Agonists include amylin analogs and amylin derivatives.
• analog is meant a peptide whose sequence is derived from that of amylin including insertions, substitutions, extensions, and/or deletions, having at least some amino acid identity to amylin or region of an amylin peptide.
• Analogs may have at least 50 or 55% amino acid sequence identity with a native amylin, or at least 70%, 80%, 90%, or 95% amino acid sequence identity with a native amylin.
• such analogs may comprise conservative or non-conservative amino acid substitutions (including non-natural amino acids and L and D forms).
• Amylin agonist analogs are analogs as herein described and function as an amylin agonist.
• a “derivative” is defined as a molecule having the amino acid sequence of a native amylin or analog, but additionally having a chemical modification of one or more of its amino acid side groups, ⁇ -carbon atoms, terminal amino group, or terminal carboxylic acid group.
• a chemical modification includes, but is not limited to, adding chemical moieties, creating new bonds, and removing chemical moieties. Modifications at amino acid side groups include, without limitation, acylation of lysine ⁇ -amino groups, N-alkylation of arginine, histidine, or lysine, alkylation of glutamic or aspartic carboxylic acid groups, and deamidation of glutamine or asparagine.
• Modifications of the terminal amino include, without limitation, the desamino, N-lower alkyl, N-di- lower alkyl, constrained alkyls (e.g. branched, cyclic, fused, adamantyl) and N-acyl modifications.
• Modifications of the terminal carboxy group include, without limitation, the amide, lower alkyl amide, constrained alkyls (e.g. branched, cyclic, fused, adamantyl) alkyl, dialkyl amide, and lower alkyl ester modifications.
• Lower alkyl is C1-C4 alkyl.
• one or more side groups, or terminal groups may be protected by protective groups known to the ordinarily-skilled synthetic chemist.
• the ⁇ -carbon of an amino acid may be mono- or dimethylated.
• Amylin is a 37 amino acid peptide hormone that is co-secreted with insulin from pancreatic beta-cells in response to nutrient stimuli.
• Human amylin has the following amino acid sequence: [0061] Lys-Cys-Asn-Thr-Ala-Thr-Cys-Ala-Thr-Gln Arg-Leu-Ala-Asn-Phe-Leu-Val-His-Ser-Ser- Asn-Asn-Phe-Gly-Ala-He-Leu-Ser-Ser-Thr-Asn-Val-Gly-Ser-Asn-Thr-Tyr (SEQ ID NO:1), although the use of amylins from any species is contemplated.
• Amylin agonists contemplated in the use of the invention include those described in U.S. Patent Nos. 5,686,411, 6,114,304, and 6,410,511, which are herein incorporated by reference in their entirety.
• Such compounds include those having formula I, Gly- ⁇ Ii-JrLeu-KrLr ⁇ Thr-MrVal-Gly-Ser- ⁇ Asn-Thr-Tyr (SEQ ID NO:2) wherein A 1 is Lys, Ala, Ser or hydrogen;
• B 1 is Ala, Ser orThr; C 1 is VaI, Leu or He;
• D 1 is His or Arg
• E 1 is Ser or Thr
• F 1 is Ser, Thr, GIn or Asn
• G 1 is Asn, GIn or His; H 1 is Phe, Leu or Tyr;
• I 1 is Ala or Pro
• J 1 is He, VaI, Ala or Leu;
• K 1 is Ser, Pro, Leu, He or Thr
• L 1 is Ser, Pro or Thr; M 1 is Asa, Asp, or GIn;
• X and Y are independently selected amino acid residues having side chains which are chemically bonded to each other to form an intramolecular linkage.
• the C-terminal portion can be amino, alkylamino, dialkylamino, cycloalkylamino, arylamino, aralkylamino, alkyloxy, aryloxy, aralkyloxy or carboxyl.
• Suitable side chains for X and Y include groups derived from alkyl sulfhydryls which may form disulfide bonds; alkyl acids and alkyl amines which may form cyclic lactams; alkyl aldehydes or alkyl halides and alkylamines which may condense and be reduced to form an alkyl amine bridge; or side chains which may be connected to form an alkyl, alkenyl, alkynyl, ether or thioether bond.
• Alkyl chains can include lower alkyl groups having from about 1 to about 6 carbon atoms.
• An additional aspect of the present invention is directed to agonist analogues of SEQ ID NO:2 which are not bridged, and wherein X and Y are independently selected from Ala, Ser, Cys, VaI, Leu and He or alkyl, aryl, or aralkyl esters and ethers of Ser or Cys.
• Exemplary compounds include, but are not limited to des-'Lys-h-amylin, 28 Pro-h-amylin, 25 ' 28>29 Pro-h-amylin, 18 Arg 25 ' 28 Pro-h-amylin, and des- 1 Lys 18 Arg 25 ' 28 Pro-h-amylin, which all show amylin activity in vivo in treated test animals, (e.g., provoking marked hyperlactemia followed by hyperglycemia).
• some compounds of the invention have also been found to possess more desirable solubility and stability characteristics when compared to human amylin. Examples of these compounds include 25 PrO 26 VaI 28 ' 29 Pro-h- amylin, 25 ' 28>29 Pro-h-amylin, and 18 Arg 25 ' 28 Pro-h-arnylin.
• Other compounds include 18 Arg 25 ' 28 Pro-h-amylin 3 des ⁇ Lys ⁇ Arg ⁇ Pro-h-amylin, 18 Arg 25 ' 28 ' 29 Pro-h-amylin, des- 1 Lys 18 Arg 25 ' 28 ' 29 Pro-h-amylin, 25 ' 28 ' 29 Pro-h-amylin, des- 1 Lys 25 ' 28>29 Pro-h-amylm, 2s Pro 26 Val 28 ' 29 Pro-h-amylin, 23 Leu 25 Pro 26 Val 28 ' 29 Pro-h-amylin, 23 Leu 25 Pro 26 Val 28 Pro-h-amylin, des- 1 Lys 23 Leu 25 Pro 26 Val 28 Pro-h-amylin, 18 Arg 23 Leu 25 Pro 26 Val.
• Useful amylin agonist analogs include those identified in PCT publication WO9310146 entitled “Amylin Agonist Peptides and Uses Therefor” and related U.S. Patent Nos. 5,686,411, 5,998,367, and 6,610,824 the contents of which are hereby incorporated by reference.
• Useful amylin agonists also include analogs of formula ⁇ , X 1 -Xaa t -X 2 -Xaa 2 -X 3 -Xaa 3 -X 4
• X 1 is Lys, Arg or absent
• X 2 is Xaa ⁇ Xaa 7 Xaa 8 Xaa 9 (SEQ. ID. NO. 4) or Z-Xaa 10 SerThr, provided that if X 2 is Z-Xaa 10 SerThr, then X 1 and X&& ⁇ are both absent;
• X 3 is AlaThr, AlaSer, SerMet, GluThr or ValThr;
• X 4 is ArgLeuAla, HisLeuAla, ArglleAla, LysHeAla, ArgMetAla, HisMetAla, LysMetAla or
• X 5 is PheLeu, PheHe, PheMet, TyrLeu, TyrHe, TyrMet, TrpMet, TrpHe or TrpMet;
• X 6 is ArgSerSerGlyTyr (SEQ ID NO:5), LysSerSerGlyTyr (SEQ ID NO:6), HisSerSerGlyTyr (SEQ ID NO:5)
• ArgSerGlyTyr (SEQ ID NO: 15), ArgSer, LysSer, HisSer, ArgThr, ProSer or Arg;
• Xaa t is Cys or absent;
• Xaa 2 is Cys or Ala
• Xaa 3 is GIn, Ala or Asn
• Xaa 4 is Asn, Ala or GIn;
• Xaa 5 is VaI, Ala, He, Met, Leu, PentylGly, or t-butylGly;
• Xaae is Asn, GIn or Asp;
• Xaa 7 is Thr, Ser, Met, VaI, Leu or He;
• Xaa 8 is Ala or VaI
• Xaa 9 is Thr or Ser
• Xaa 10 is Leu, VaI, Met or He; and Z is an alkanoyl group of about 1 to about 8 carbon atoms or absent, and pharmaceutically acceptable salts thereof.
• Useful amylin agonists may include analogs of comprising an amino acid sequence of formula HI, Xaal X Xaa3 Xaa4 Xaa5 Xaa6 Y Xaa8 Xaa9 XaalO Xaall Xaal2 Xaal3 Xaal4
• Xaal is A, C, hC (homoCys), D, E, F, I, L, K, hK (homoLys), R, hR (homoArg), S, Hse(homoSer),
• Xaa3 is A, D, E, N, Q, G, V, R, K 5 hK, hR, H, I, L, M, or absent;
• Xaa4 is A, I, L, S, Hse, T, V, M, or absent
• Xaa5 is A, S 5 T, Hse, Y, V, I, L 5 or M;
• Xaa6 is T, A, S, Hse, Y, V, I, L, or M;
• Xaa9 is L, T, S, Hse, V, I, or M;
• XaalO is G, H 5 Q, K, R 5 N 5 hK, or hR;
• Xaal 1 is K, R, Q, N, hK, hR, or H;
• Xaal2 is L, I, V, F, M, W 5 or Y;
• Xaal 3 is A, F 5 Y 5 N, Q, S 5 Hse, orT;
• Xaal4 is A 5 D 5 E 5 G 5 N 5 K 5 Q 5 R 5 H 5 hR, or hK;
• Xaal 5 is A 5 D 5 E, F, L, S, Y 5 1, V 5 or M;
• Xaal 7 is H, Q, N, S, Hse, T 5 or V;
• Xaal 8 is K 5 hK, R, hR, H 5 u (Cit), or n (Om);
• Xaal 9 is F, L 5 S, Hse,V, I 5 T 5 or absent;
• Xaa20 is H 5 R 5 K 5 hR, hK, N, Q, or absent;
• Xaa21 is T, S, Hse, V, I, L, Q 5 N, or absent;
• Xaa23 is P or Hyp
• Xaa24 is P 5 Hyp, R 5 K, hR, hK 5 or H; Xaa25 is T 5 S, Hse, V, I, L, F 5 or Y;
• Xaa26 is N 5 Q 5 D 5 or E;
• Xaa28 is G or A
• Xaa29 is S 5 Hse, T 5 V 5 1, L, or Y;
• Xaa30 is E 5 G 5 K 5 N 5 D,R 5 hR 5 hK 5 H, or Q;
• Xaa31 is A 5 T 5 S, Hse, V 5 1, L 5 F, or Y;
• Xaa32 is F 5 P 5 Y, Hse, S, T 5 or Hyp;
• X and Y are capable of creating a bond and are independently selected residues having side chains which are chemically bonded to each other to form an intramolecular linkage such as disulfide bonds; amide bond; alkyl acids and alkyl amines which may form cyclic lactams; alkyl aldehydes or alkyl halides and alkylamines which may condensed and be reduced to form an alkyl amine or imine bridge; or side chains which may be connected to form an alkyl, alkenyl, alkynyl, ether or thioether bond.
• Alkyl chains may include lower alkyl groups having from about 1 to about 6 carbon atoms.
• the intramolecular linkage may be a disulfide, amide, imine, amine, alkyl or alkene bond.
• X and Y are independently selected from Ser, Asp, GIu, Lys, Orn, or Cys.
• X and Y are Cys and Cys.
• X and Y are Ser and Ser.
• X and Y are Asp and Lys or Lys and Asp.
• Other embodiments are described in international application PCT/US2005/004631, filed on Feb. 11, 2005, or in WO2006052608, both incorporated by reference.
• Exemplary compounds described with reference to human amylin (SEQ ID NO: 1) and salmon calcitonin (sCT) CSNLSTCVLGKLSQELHKLQTYPRIKTGSGTP (SEQ ID NO: 17) with modifications at the ⁇ osition(s) indicated include, (1-7 hAmy)( 18 Arg ⁇ 8-27 sCT)(33-37 hAmy); (1-7 hAmy)( n ' 18 Arg 22 Leu-8-27sCT)(33-37 hAmy); (1-7 hAmy)( 1I ' 18 Arg 24 Pro-8-27 sCT)(33-37 hAmy); (1-7 hAmy)( ⁇ ' 18 Arg-8-24sCT)(30-37 hAmy); (1-7 hAmy)(l lArg,18Arg-8-21 sCT)(27-37 rAmy); ( 8 Val 9 Leu 10 Gly--l-15hAmy)( 18 Arg-16-27sCT
• amylin agonists may include analogs of comprising an amino acid sequence of formula Xaal Xaa2 Xaa3 Leu Xaa4 GIu Leu Xaa5 Xaa6 Leu GIn Thr Tyr Pro Arg Thr Asn Xaa7 Z3 [SEQ ID NO 22] Wherein
• Xaal is (i) a group having two amino acid residues selected from the group consisting of Leu- Leu, Val-Leu, He-Leu, tert-Leu-Leu, Me-Leu, and Ala-Thr, and N-acylated derivatives thereof; or is (ii) the group Zl -Ser-Thr-Z2- Val-Leu [SEQ ID NO: 23] wherein Zl is an amino acid residue selected from the group consisting of Leu, VaI, He, tert-Leu, Nva, Abu, and NIe or an N-acylated derivative thereof or Zl is an alkanoyl group; and Z2 is an amino acid residue selected from the group consisting of Ala, Ser, Cys, and Thr;
• Xaa2 is an amino acid residue selected from the group consisting GIy, GIu, Asn or Aib;
• Xaa3 is an amino acid residue selected from the group consisting of Arg, Orn, Lys, and G- amidated derivatives thereof;
• Xaa4 is a group having two or more amino acid residues selected from the group consisting of Ser-Gln, Thr-Gln, Ala- Asn, and Thr- Asn;
• Xaa5 is an amino acid residue selected from the group consisting of His, Aib, He, Leu, and VaI;
• Xaa ⁇ is an amino acid residue selected from the group consisting of Arg, Orn, and Lys and C- amidated derivates thereof;
• Xaa7 is a group having six amino acid residues selected from the group consisting of (i) Thr-Gly-Ser-Asn-Thr-Tyr [SEQ ID NO: 24]; (ii) Thr-Gly-Ser-Gly-Thr-Pro [SEQ ID NO: 25]; (iii) Val-Gly-Ser-Asn-Thr-Tyr [SEQ ID NO: 26]; (iv) Val-Gly-Ser-Gly-Thr-Pro [SEQ ID NO: 27]; and
• Peptides useful in the invention can be in the acid or amide form.
• Derivatives of the agonists and analogs are also included within the scope of this invention in which the stereochemistry of individual amino acids may be inverted from (L)/S to (D)/R at one or more specific sites.
• the agonists and analogs modified by glycosylation of Asn, Ser and/or Thr residues are also included within the scope of this invention.
• Compounds useful in the methods of the invention may also be biologically active fragments of the peptides (native, agonist, analog, and derivative) herein described.
• Agonist and analogs of amylin that contain less peptide character are included within the scope of this invention.
• depsipeptides — CO--O--
• iminomethylenes -CH 2 -NH-
• thioamides thioamides
• thiomethylenes thi
• Such salts include salts prepared with organic and inorganic acids, for example, HCl, HBr, H 2 SO 4 , H 3 PO 4 , trifluoroacetic acid, acetic acid, formic acid, methanesulfonic acid, toluenesulfonic acid, maleic acid, fumaric acid and camphorsulfonic acid.
• Salts prepared with bases include, for example, ammonium salts, alkali metal salts (such as sodium and potassium salts) and alkali earth salts (such as calcium and magnesium salts). Acetate, hydrochloride, and trifluoroacetate salts are particularly useful.
• Amylin agonists useful in the invention may also include fragments of amylin and its analogs as described above as well as those described in EP 289287, the contents of which are herein incorporated by reference.
• Amylin agonists analogs may also be compounds having at least 60, 65, 70, 75, 80, 85, 90, 95, or 99% amino acid sequence identity to SEQ ID NO:1, or any of the amylin analogs specifically described herein having amylin activity.
• Amylin agonists also include small molecules and non-peptide molecules, for example those based on small molecule chemistry.
• Amylin activity as used herein may include the activities known in the art as described below or the ability of amylin to modulate Na+/K+-ATPase enzyme efficiency. Desirable amylin agonists or amylin analogs may have at least one property shared by cardioprotective agents such as bepridil
• Amylin agonist analogs also include insertions, deletions, extensions, truncations, and/or substitutions in at least one or more amino acid positions of SEQ ID NO:1 or any of the amylin analogs specifically described herein.
• the number of amino acid insertions, deletions, or substitutions maybe at least 5, 10, 15, 20, 25, or 30. Insertions, extensions, or substitutions may be with other natural amino acids, synthetic amino acids, peptidomimetics, or other chemical compounds.
• amylin agonists or amylin agonist analogs are recognized as referring to compounds which, by directly or indirectly interacting or binding with one or more receptors, mimics an action of amylin.
• amylinmimetics They may also be referred to as amylinmimetics.
• Activity as amylin agonists and/or analogs can be confirmed and quantified by performing various screening assays, including the nucleus accumbens receptor binding assay, the soleus muscle assay, a gastric emptying assay, or by the ability to induce hypocalcemia, reduce • postprandial hyperglycemia in mammals, or the cardioprotective assays described herein. Methods of testing compounds for amylin activity are known in the art. Exemplary screening methods and assays for testing amylin agonists are described in U.S. Patent Nos. 5,264,372 and 5,686,411, which are incorporated herein by reference.
• the receptor binding assay a competition assay that measures the ability of compounds to bind specifically to membrane-bound amylin receptors.
• a very useful of the membrane preparations used in the assay is the basal forebrain which comprises membranes from the nucleus accumbens and surrounding regions. Compounds being assayed compete for binding to these receptor preparations with 125 I Bolton Hunter rat amylin. Competition curves, wherein the amount bound (B) is plotted as a function of the log of the concentration of ligand, are analyzed by computer using analyses by nonlinear regression to a 4-parameter logistic equation (Inplot program; GraphPAD Software, San Diego, Calif.) or the ALLFIT program of DeLean et al.
• amylin agonists/analogs in the soleus muscle may be performed using previously described methods (Leighton, B. and Cooper, Nature, 335:632-635 (1988); Cooper, et al., Proc. Natl. Acad. Sci. USA 85:7763-7766 (1988)), in which amylin agonist activity may be assessed by measuring the inhibition of insulin-stimulated glycogen synthesis.
• an exemplary method includes soleus muscle strips prepared from 12-h fasted male Wistar rats.
• the tendons of the muscles are ligated before attachment to stainless steel clips.
• Muscle strips are pre-incubated in Erlenmeyer flasks containing 3.5 ml Krebs-Ringer bicarbonate buffer, 7mM N- 2-hydroxyethyl-peperazine-N'-2-ethane-sulphonic acid, pH 7.4, and 5.5 mM pyruvate. Flasks are sealed and gassed continuously with O 2 and CO 2 in the ratio 19:1 (v/v).
• Amylin agonist compounds may exhibit activity in the receptor binding assay on the order of less than about 1 to 5 nM, can be less than about 1 nM and can be less than about 50 pM. In the soleus muscle assay, amylin agonist compounds may show EC 5O values on the order of less than about 1 to 10 micromolar. In the gastric emptying assays, in one embodiment the agonist compounds show ED 50 values on the order of less than 100 ⁇ g/rat.
• compounds of the invention may be prepared using standard solid-phase peptide synthesis techniques and can further be an automated or semiautomated peptide synthesizer.
• an ⁇ -N-carbamoyl protected amino acid and an amino acid attached to the growing peptide chain on a resin are coupled at room temperature in an inert solvent such as dimethylformamide, N-methylpyrrolidinone or methylene chloride in the presence of coupling agents such as dicyclohexylcarb ⁇ diimide and 1- hydroxybenzotriazole in the presence of a base such as diisopropylethylamine.
• the ⁇ -N-carbamoyl protecting group is removed from the resulting peptide-resin using a reagent such as trifluoroacetic acid or piperidine, and the coupling reaction repeated with the next desired N-protected amino acid to be added to the peptide chain.
• a reagent such as trifluoroacetic acid or piperidine
• Suitable N-protecting groups are well known in the art, with t- butyloxycarbonyl (tBoc) and fluorenylmethoxycarbonyl (Fmoc) being particularly useful.
• Other methods of synthesizing or expressing amylin and amylin agonists and purifying them are known to the skilled artisan. For example, chemical and recombinant methods useful to synthesize amylin agonists and hybrids with amylin agonists can be found, for example, in WO2005077072, and other references cited herein.
• Compounds useful in the practice of the invention may be administered alone or in combination with pharmaceutically acceptable carriers or excipients, in either single or multiple doses.
• These pharmaceutical compounds may be formulated with pharmaceutically acceptable carriers or diluents as well as any other known adjuvants and excipients in accordance with conventional techniques such as those disclosed in Remington's Pharmaceutical Sciences by E. W. Martin. See also Wang, Y. J. and Hanson, M. A. "Parenteral Formulations of Proteins and Peptides: Stability and Stabilizers," Journal of Parenteral Science and Technology, Technical Report No. 10, Supp. 42:2S (1988). [0089] In general, the compounds may be formulated into a stable, safe pharmaceutical composition for administration to a patient.
• compositions contemplated for use in the methods of the invention may comprise approximately 0.01 to 6.0% (w/v), can be 0.05 to 1.0%, of the compound, approximately 0.02 to 0.5% (w/v) of an acetate, phosphate, citrate or glutamate buffer allowing a pH of the final composition of from about 3.0 to about 7.0; approximately 1.0 to 10% (w/v) of a carbohydrate or polyhydric alcohol tonicifier and, optionally, approximately 0.005 to 1.0% (w/v) of a preservative selected from the group consisting of m-cresol, benzyl alcohol, methyl-, ethyl-, propyl- and butyl- parabens and phenol.
• a pharmaceutical formulation of the present invention may contain a range of concentrations of the compound, e.g., between about 0.01% to about 98% w/w, or between about 1 to about 98% w/v, or can be between 80% and 90% w/v, or can be between about 0.01% to about 50% w/v, or in yet other embodiments can be between about 10% to about 25% w/v in this embodiment.
• a sufficient amount of water for injection may be used to obtain the desired concentration of solution.
• Additional tonicifying agents such as sodium chloride, as well as other known excipients, may also be present, if desired. It one embodiment, however, such excipients will maintain the overall tonicity of the formulations.
• An excipient may be included in the presently described formulations at various concentrations. For example, an excipient may be included in the concentration range from about 0.02% to about 20% w/w, can be between about 0.02% and 0.5% w/w, about 0.02% to about 10% w/w, or about 1 % to about 20% w/w.
• an excipient may be included in solid (including powdered), liquid, semi-solid or gel form.
• the pharmaceutical formulations may be composed in various forms, e.g., solid, semisolid or liquid.
• solid as used herein, is meant to encompass all normal uses of this term including, for example, powders and lyophilized formulations.
• the presently described formulations maybe lyophilized.
• buffer, buffer solution and buffered solution when used with reference to hydrogen-ion concentration or pH, refer to the ability of a system, particularly an aqueous solution, to resist a change of pH on adding acid or alkali, or on dilution with a solvent.
• Characteristic of buffered solutions which undergo small changes of pH on addition of acid or base, is the presence either of a weak acid and a salt of the weak acid, or a weak base and a salt of the weak base.
• An example of the former system is acetic acid and sodium acetate.
• the change of pH is slight as long as the amount of hydronium or hydroxyl ion added does not exceed the capacity of the buffer system to neutralize it.
• a variety of liquid vehicles are suitable for use in the present peptide formulations, for example, water or an aqueous/organic solvent mixture or suspension.
• the stability of a peptide formulation of the present invention is enhanced by maintaining the pH of the formulation in the range of about 3.0 to about 7.0 when in liquid form.
• the pH of the formulation is maintained in the range of about 3.5 to 5.0, or about 3.5 to 6.5, or can be from about 3.7 to 4.3, or about 3.8 to 4.2.
• a particularly useful pH may be about 4.0. While not seeking to be bound by this theory, it is presently understood that where the pH of the pharmaceutical formulation exceeds 5.5, chemical degradation of the peptide may be accelerated such that the shelf life is less than about two years.
• the buffer used in the practice of the present invention is an acetate buffer (which can be at a final formulation concentration of from about 1-5, e.g., 1.5, to about 60 mM), phosphate buffer (which can be at a final formulation concentration of from about 1-5, e.g., 1.5, to about 30 mM) or glutamate buffer (which can be at a final formulation concentration of from about 1-5, e.g., 1.5 to about 60 mM).
• a very useful buffer is acetate (particularly at a final formulation concentration of from about 5 to about 30 mM).
• a stabilizer may be included in the present formulation but, and importantly, is not necessarily needed. If included, however, a stabilizer useful in the practice of the present invention is a carbohydrate or a polyhydric alcohol.
• a suitable stabilizer useful in the practice of the present invention is approximately 1.0 to 10% (w/v) of a carbohydrate or polyhydric alcohol.
• the polyhydric alcohols and carbohydrates share the same feature in their backbones, i.e., -CHOH- CHOH-, which is responsible for stabilizing the proteins.
• the polyhydric alcohols include such compounds as sorbitol, mannitol, glycerol, and polyethylene glycols (PEGs). These compounds are straight-chain molecules.
• the carbohydrates such as mannose, ribose, sucrose, fructose, trehalose, maltose, inositol, and lactose, on the other hand, are cyclic molecules that may contain a keto or aldehyde group. These two classes of compounds have been demonstrated to be effective in stabilizing protein against denaturation caused by elevated temperature and by freeze-thaw or freeze-drying processes.
• Suitable carbohydrates include: galactose, arabinose, lactose or any other carbohydrate which does not have an adverse affect on a diabetic patient, i.e., the carbohydrate is not metabolized to form unacceptably large concentrations of glucose in the blood.
• Such carbohydrates are well known in the art as suitable for diabetics.
• Sucrose and fructose are suitable for use with the compound in non-diabetic subjects (e.g., treating obesity).
• the compound can be stabilized with a polyhydric alcohol such as sorbitol, mannitol, inositol, glycerol, xylitol, and polypropylene/ethylene glycol copolymer, as well as various polyethylene glycols (PEG) of molecular weight 200, 400, 1450, 3350, 4000, 6000, and 8000).
• PEG polyethylene glycols
• Another useful feature of the lyophilized formulations of the present invention is the maintenance of the tonicity of the lyophilized formulations described herein with the same formulation component that serves to maintain their stability.
• Mannitol is a particularly useful polyhydric alcohol used for this purpose.
• USP United States Pharmacopeia
• anti-microbial agents in bacteriostatic or fungistatic concentrations must be added to preparations contained in multiple dose containers. They must be present in adequate concentration at the time of use to prevent the multiplication of microorganisms inadvertently introduced into the preparation while withdrawing a portion of the contents with a hypodermic needle and syringe, or using other invasive means for delivery, such as pen injectors.
• Anti-microbial agents should be evaluated to ensure compatibility with all other components of the formula, and their activity should be evaluated in the total formula to ensure that a particular agent that is effective in one formulation is not ineffective in another. It is not uncommon to find that a particular anti-microbial agent will be effective in one formulation but not effective in another formulation.
• a preservative is, in the common pharmaceutical sense, a substance that prevents or inhibits microbial growth and may be added to pharmaceutical formulations for this purpose to avoid consequent spoilage of the formulation by microorganisms. While the amount of the preservative is not great, it may nevertheless affect the overall stability of the peptide. [00101] While the preservative for use in the pharmaceutical compositions can range from
• exemplary ranges for each preservative, alone or in combination with others is: benzyl alcohol (0.1-1.0%), or m-cresol (0.1-0.6%), or phenol (0.1-0.8%) or combination of methyl (0.05-0.25%) and ethyl- or propyl- or butyl- (0.005%-0.03%) parabens.
• the parabens are lower alkyl esters of para-hydroxybenzoic acid.
• Relatively low concentrations of surfactant may exert a potent denaturing activity, because of the strong interactions between surfactant moieties and the reactive sites on proteins. However, judicious use of this interaction can stabilize proteins against interfacial or surface denaturation.
• Surfactants which could further stabilize the peptide may optionally be present in the range of about 0.001 to 0.3% (w/v) of the total formulation and include polysorbate 80 (i.e., polyoxyethylene(20) sorbitan monooleate), CHAPS ® (i.e., 3-[(3- cholamidopropyl) dimethylammonio] 1-propanesulfonate), Brij ® (e.g., Brij 35, which is (polyoxyethylene (23) lauryl ether), poloxamer, or another non-ionic surfactant. [00104] It may also be desirable to add sodium chloride or other salt to adjust the tonicity of the pharmaceutical formulation, depending on the tonicifier selected. However, this is optional and depends on the particular formulation selected. Parenteral formulations can be isotonic or substantially isotonic.
• a particularly useful vehicle for parenteral products is water.
• Water of suitable quality for parenteral administration can be prepared either by distillation or by reverse osmosis.
• Water for injection is a very useful aqueous vehicle for use in the pharmaceutical injectable formulations.
• Such additional ingredients may include, e.g., wetting agents, emulsifiers, oils, antioxidants, bulking agents, tonicity modifiers, chelating agents, metal ions, oleaginous vehicles, proteins (e.g., human serum albumin, gelatin or proteins) and a zwitterion (e.g., an amino acid such as betaine, taurine, arginine, glycine, lysine and histidine).
• proteins e.g., human serum albumin, gelatin or proteins
• a zwitterion e.g., an amino acid such as betaine, taurine, arginine, glycine, lysine and histidine.
• polymer solutions, or mixtures with polymers provide the opportunity for controlled release of the peptide.
• Such additional ingredients should not adversely affect the overall stability of the pharmaceutical formulation of the present invention.
• Containers are also an integral part of the formulation of an injection and may be considered a component, for there is no container that is totally inert, or does not in some way affect the liquid it contains, particularly if the liquid is aqueous. Therefore, the selection of a container for a particular injection must be based on a consideration of the composition of the container, as well as of the solution, and the treatment to which it will be subjected. Adsorption of the peptide to the glass surface of the vial can also be minimized, if necessary, by use of borosilicate glass, for example, Wheaton Type I borosilicate glass #33 (Wheaton Type 1-33) or its equivalent (Wheaton Glass Co.).
• borosilicate glass for example, Wheaton Type I borosilicate glass #33 (Wheaton Type 1-33) or its equivalent (Wheaton Glass Co.).
• borosilicate glass vials and cartridges acceptable for manufacture include Kimbel Glass Co., West Co., Bunder Glas GMBH and Forma Vitrum.
• the biological and chemical properties of the compound may be stabilized by formulation and lyophilization in a Wheaton Type 1-33 borosilicate serum vial to a final concentration of 0.1 mg/ml and 10 mg/ml of the compound in the presence of 5% mannitol, and 0.02% Tween 80.
• each vial can be sealed with a rubber stopper closure held in place by an aluminum band.
• Stoppers for glass vials such as, West 4416/50, 4416/50 (Teflon faced) and 4406/40, Abbott 5139 or any equivalent stopper can be used as the closure for pharmaceutical for injection. These stoppers are compatible with the peptide as well as the other components of the formulation.
• stoppers pass the stopper integrity test when tested using patient use patterns, e.g., the stopper can withstand at least about 100 injections.
• the peptide can be lyophilized in vials, syringes or cartridges for subsequent reconstitution.
• Liquid formulations of the present invention can be filled into one or two chambered cartridges, or one or two chamber syringes.
• the manufacturing process for the above liquid formulations generally involves compounding, sterile filtration and filling steps.
• the compounding procedure involves dissolution of ingredients in a specific order (preservative followed by stabilizer/tonicity agents, buffers and peptide) or dissolving at the same time.
• Alternative formulations e.g., non-parenteral, may not require sterilization.
• any suitable sterilization process can be used in developing the peptide pharmaceutical formulation of the present invention.
• Typical sterilization processes include filtration, steam (moist heat), dry heat, gases (e.g., ethylene oxide, formaldehyde, chlorine dioxide, propylene oxide, beta-propiolacctone, ozone, chloropicrin, peracetic acid methyl bromide and the like), exposure to a radiation source, and aseptic handling.
• Filtration is one embodiment of the method of sterilization for liquid formulations of the present invention.
• the sterile filtration involves filtration through 0.45 ⁇ m and 0.22 ⁇ m (1 or 2) which may be connected in series. After filtration, the solution is filled into appropriate vials or containers.
• the liquid pharmaceutical formulations of the present invention are intended for parenteral administration.
• Suitable routes of administration include intramuscular, intravenous, subcutaneous, intradermal, intraarticular, intrathecal and the like.
• the subcutaneous route of administration is one embodiment.
• Mucosal delivery is another. These routes include, but are not limited to, oral, nasal, sublingual, pulmonary and buccal routes which may include administration of the peptide in liquid, semi-solid or solid form. Administration via these routes requires substantially more peptide to obtain the desired biological effects due to decreased bioavailability compared to parenteral delivery.
• parenteral controlled release delivery can be achieved by forming polymeric microcapsules, matrixes, solutions, implants and devices and administering them parenterally or by surgical means.
• controlled release formulations are described in U.S. Patent Nos. 6,368,630, 6,379,704, and 5,766,627, which are incorporated herein by reference. These dosage forms may have a lower bioavailability due to entrapment of some of the peptide in the polymer matrix or device. See e.g., U.S. Pat. Nos. 6,379,704, 6,379,703, and 6,296,842.
• the compounds may be provided in dosage unit form containing an amount of the compound with or without insulin or glucose (or a source of glucose) that will be effective in one or multiple doses to treat or help in treating the psychiatric disease and/or unwanted side effects of the psychiatric treatment/medication.
• an effective amount of therapeutic agent will vary with many factors including the age and weight of the patient, the patient's physical condition, the condition to be treated, and other factors.
• typical doses may contain from a lower limit of about 1 ⁇ g, 5 ⁇ g, 10 ⁇ g,
• exemplary doses may be 15, 30, 60, 90, 120, 180, 240, 360, or 500 ⁇ g of the compound per dose.
• the doses per day may be delivered in discrete unit doses or provided continuously in a 24 hour period, or any portion of that 24 hour period.
• the number of doses per day may be from 1 to about 4 doses per day, although it could be more. Continuous delivery can be in the form of continuous infusions.
• Exemplary doses and infusion rates include from 0.005 nmol/kg to about 20 nmol/kg per discrete dose or from about 0.01/pmol/kg/mm to about 10 pmol/kg/min in a continuous infusion. These doses and infusions can be delivered by intravenous administration (i.v.) or subcutaneous administration (s.c). Exemplary total dose/delivery of the pharmaceutical composition given i.v. may be about 2 ⁇ g to about 8 mg per day, whereas total dose/delivery of the pharmaceutical composition given s.c may be about 6 ⁇ g to about 16 or 24 mg per day.
• an amylin or amylin agonist useful in the methods of the present invention with one or more other active ingredients useful in cardioprotection.
• an amylin or amylin agonist may be combined with one or more other compounds, in a unitary dosage form, or in separate dosage forms intended for simultaneous or sequential administration to a patient in need of treatment. When administered sequentially, the combination may be administered in two or more administrations.
• active ingredients may be administered in combination with amylin or amylin agonists that may act to augment or synergistically enhance the prevention of cardiac cells or tissues.
• the one or more other active ingredients include those useful in cardioprotection, which includes angiotensin II antagonists, renin inhibitors and calcium channel blockers.
• Angiotensin- ⁇ receptor antagonists are anti-hypertensive agents that are selective for the angiotensin II (type 1 receptor).
• the angiotensin-II receptor antagonists include losartan, valsartan, irbesartan, candesartan, telmisartan, olmesartan, eprosartan, tasosartan and zolarsartan.
• a diuretic such as hydrochlorothiazide, is also administered with the amylin or amylin agonist, or in yet a further embodiment, with the AT-II inhibitor.
• Angiotensin- receptor blockers have been shown to reduce mortality and reduce hospital admissions of subjects at risk for heart failure. For example, candesartan was reported to reduce mortality and hospital admissions in subjects with chronic heart failure.
• Calcium channel blockers include dihydropyridines, phenylalkylamines, and benzodiazepines, including bepridil, nitrendipine, nifedipine, nisoldipine, nimodipine, cilnidipine, aranidipine, manidipine, felodipine, nicardipine, amlodipine, and lacidipine.
• the amylin or amylin agonist is administered in combination with the calcium channel blocker bepridil.
• Renin inhibitors inhibit the actions of renin and thus prevent the conversion of angiotensinogen into angiotensin I, to provide cardiovascular benefits.
• Renin inhibitors include enalkiren, remikiren, 3-alkoxy-4-aryl-pi ⁇ eridines, such as R066-1132 (Hoffmann-La Roche), alkanecarboxamides such as aliskiren (Lindsay and Skrydstrup, J. Org. Chem. 71(13):4766-4777 (2006)), diazabicyclononene and tetrahydropyridine derivatives (see WO2004096804) and azabicyclononene derivatives (see WO2006064484).
• an amylin or amylin agonist is administered in adjunct therapy with one or more peptides or proteins that provide a cardiovascular benefit such as those that have an inotropic and/or vasodilator effect
• peptide families useful in adjunct therapy with an amylin or amylin agonist include adrenomedullins, natriuretic peptides, ghrelins, urocortins, intermedins, GLP-I agonists and exendins, and their fragments, analogs and derivatives.
• species variations including, e.g., murine, hamster, chicken, bovine, rat, dog, and frog.
• the adjunct therapy can include hybrid compounds of the amylin or amylin agonist joined to the peptide or protein.
• Methods useful for making such hybrid proteins and component peptides useful in such hybrids are discussed for example in WO2005077072.
• Adrenomedullin is a 52 amino acid peptide hormone that has been reported as cardioprotective (Nishikimi et al. Hypertens. Res. Sup ⁇ l:S121-7 (2003)). See EP0622458B1 and WO2005077072, for example, for exemplary ADM analogs and derivatives.
• GLP-I glucagon like peptide-1 includes human GLP-l(l-37), GLP-l(7-37), and GLP-l(7-36)amide (with reference to the full length human GLP-l(l-37)).
• GLP-I has been reported to improve to improve regional and global LV function after successful reperfusion (Nikolaidis et al., Circulation 109:962-965 (2004)) and to improve outcomes in subjects suffering from acute myocardial infarction who also have impaired glucose tolerance (U.S. Patent 6,747,006).
• GLP-I analogs and derivatives, particularly those with prolonged serum half-life, are found for example in U. S. Patent 6,268,343.
• An exemplary GLP-I derivative is liraglutide.
• Exendins for example, exendin-3 and exendin-4 (Eng et al., J. Biol. Chem., 265:20259-62 (1990); Eng. et al., J. Biol.
• AFP-6 analogs and derivatives include those described in WO2004048547, WO2006042242 or WO2005077072, for example.
• Natriuretic peptide hormones are atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), C-type natriuretic peptide (CNP) and urodilatin.
• BNP brain natriuretic peptide
• CNP C-type natriuretic peptide
• urodilatin Recombinant human BNP, also known as nesiritide has been approved treatment of subjects with acutely decompensated CHF.
• Urodilatin is a kidney-derived member of the natriuretic peptide family reported to regulate sodium and water handling in the kidney, as well as a mediator of sodium excretion in patients with congestive heart failure (CHF).
• CHF congestive heart failure
• Urocortins have been reported to have cardioprotective effects (Lawrence et al., FASEB Journal 19:831-833 (2005)).
• Urocortins include the three human urocortins: Ucn-1, Ucn-2 and Ucn-3.
• Ucn-2 or Ucn-3 are particularly useful as vasodilators. These peptide hormones and useful variants thereof can be found, for example, in WO2005077072.
• an amylin and amylin agonists are provided to subjects who are intolerant to other cardioprotective therapy, such as intolerance to angiotensin II antagonists, renin inhibitors, calcium channel blockers, or BNP.
• an amylin or amylin agonist may be: (1) co-formulated and administered or delivered simultaneously in a combined formulation; (2) delivered by alternation or in parallel as separate formulations; or (3) by any other combination therapy regimen known in the art.
• the methods of the invention may comprise administering or delivering the active ingredients sequentially, e.g., in separate solution, emulsion, suspension, tablets, pills or capsules, or by different injections in separate syringes, hi general, during alternation therapy, an effective dosage of each active ingredient is administered sequentially, i.e., serially, whereas in simultaneous therapy, effective dosages of two or more active ingredients are administered together.
• Various sequences of intermittent combination therapy may also be used.
• Rat amylin (Amylin Pharmaceuticals Inc., dissolved in physiological saline: peptide content 87%) and salmon calcitonin (Amylin Pharmaceuticals Inc., dissolved in physiological saline: peptide content 90.5%) were dosed at 300 ⁇ g/kg administered i.v. 10 minutes before coronary occlusion and then 10 minutes after. 12 animals were studied per group. The test was performed blind. Bepridil (2 mg/kg i.v., 10 minutes before coronary occlusion) was used as a reference substance.

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