Controlled release cgrp delivery composition for cardiovascular and renal indications

Abstract

The present invention provides methods of treating heart failure and improving renal function, and / or preventing the advancement of heart failure into advanced stages, and methods of counteracting ischemia due to a myocardial infarction by providing improved methods of administering a therapeutically effective amount CGRP as a controlled release formulation. The therapies can be administered on an outpatient or inpatient basis and can further be used as maintenance therapies.

Description

BACKGROUND OF TILE INVENTION[0001]1. Field of the Invention[0002]The present invention provides methods for treating heart failure improving renal function, preventing or delaying the advancement of heart failure into advanced stages, and counteracting ischemia due to a myocardial infarction by providing improved methods of administering a therapeutically effective amount CGRP as a controlled release formulation.[0003]2. Description of the Prior Art[0004]Heart failure is a complex clinical syndrome that can result from any structural or functional cardiac disorder that impairs the ability of the ventricle to fill with or eject blood, and the heart works less efficiently than it should. Heart failure is characterized by specific symptoms (e.g., dyspnea and fatigue) which may limit exercise tolerance and signs (e.g., fluid retention) which may lead to pulmonary congestion and peripheral edema. Both abnormalities can impair the functional capacity and quality of life of affected indivi...

AI Technical Summary

Benefits of technology

[0015]The present invention provides a method for the treatment or prevention of heart failure (“HF”) by administering one or more doses of a CGRP formulation in a manner that will treat the conditions underlying HF while minimizing or attenuating deleterious effects commonly associated with CGRP such as nausea, diarrhea, severe facial flushing and intermittent tachycardia. More specifically, this invention provides improved CGRP dosing regimes for patients suffering from or at risk for HF, and a method of treating HF or delaying the progression of HF into more advanced stages by providing lower dose and longer term administration of CGRP.

[0016]Accordingly, one aspect of this invention provides a method of treating HF in a patient comprising administering CGRP to the patient such that circulating plasma levels of CGRP are sufficient to maintain hemodynamic stability, thereby preventing or delaying exacerbation HF symptoms. In prior clinical studies using Stage C and D HF patients, effective circulating plasma levels of CGRP were administered by intravenous infusions ranging between 157±26 pg / mL to 186±127 pg / mL (Anand, et al., 1991 and Shekhar, et al., 1991, supra). However, these doses could only be administered intravenously for about 12-24 hours before unwanted side effects set in and the IV administration had to be discontinued. In contrast, the methods of the present invention administer CGRP by controlled release systems or compositions that maintain circulating plasma levels of CGRP between about 11±5 pg / mL and 186±127 pg / mL for a length of time that is within the capabilities of the particular controlled release delivery system or composition.

[0019]This invention further provides prophylactic methods of preventing HF in a patient at risk of HF or slowing the progression or symptoms of HF in a patient suffering from HF. For example, another aspect of this invention provides a method of preventing or reducing the risk of occurrence of myocardial infarction in a patient, comprising administering to a human at risk of having a myocardial infarction a controlled release CGRP formulation in an amount effective to prevent or reduce the risk of myocardial infarction.

[0023]Another aspect of this invention comprises a method of improving renal blood flow and glomerular filtration in a patient suffering from diminished renal function, comprising administering CGRP to a patient in need thereof in a manner effective to improve renal blood flow and / or glomerular filtration.

[0024]Administering CGRP according to the methods of this invention provides a safer and more effective treatment of acute cardiac ischemia and heart failure compared to current treatments for HF. Given the advantages in cardioprotection, myocardial tissue salvage, cardiac hemodynamic improvement, and renal function provided by CGRP, the methods of this invention have the potential to be powerful frontline weapons in the arsenal of emergency room doctors who are the first to treat patients suffering from myocardial infarction (MI) upon entry into the health care system, and / or an interventional cardiologist who is working to re-establishing blood flow to an ischemic heart using angioplasty or stenting procedures, and / or a cardiologist who is treating mid- to end-stage heart failure patients to provide increased quality of life to terminal patients.

Problems solved by technology

However, these doses could only be administered intravenously for about 12-24 hours before unwanted side effects set in and the IV administration had to be discontinued.