Polymer-based sustained release device

Abstract

This invention relates to compositions for the sustained release of biologically active polypeptides, and methods of forming and using said compositions, for the sustained release of biologically active polypeptides. The sustained release compositions of this invention comprise a biocompatible polymer having dispersed therein, a biologically active polypeptide and a sugar.

Description

BACKGROUND OF TH INVENTION[0001]Numerous proteins and peptides, collectively referred to herein as polypeptides, exhibit biological activity in vivo and are useful as medicaments. Many illnesses or conditions require administration of a sustained level of medicament to provide the most effective prophylactic and / or therapeutic effects. Sustained levels are often achieved by the administration of biologically active polypeptides by frequent subcutaneous injections, which often results in fluctuating levels of medicament and poor patient compliance.[0002]As an alternative, the use of biodegradable materials, such as polymers, encapsulating the medicament can be employed as a sustained delivery system. The use of biodegradable polymers, for example, in the form of microparticles or microcarriers, can provide a sustained release of medicament, by utilizing the inherent biodegradability of the polymer to control the release of the medicament thereby providing a more consistent, sustained...

AI Technical Summary

Benefits of technology

This patent is about a new way to make medication that releases the active ingredients slowly over time. The method involves using a special polymer and a small amount of silicone oil in a ratio that creates a low pore volume. This results in a consistent and steady release of the medication. The medication can be made into a sustained release form by combining an active ingredient, a polymer, and a sugar in a specific way. The sustained release form can be injected, implanted, or delivered through various methods like nasal spray or suppository. It can be used to treat diabetes, obesity, cardiovascular disease, and other disorders. The use of sugar in the formulation improves the absorption of the medication and reduces the amount of active ingredient needed. This method of sustained release provides a more effective and consistent treatment for patients.

Problems solved by technology

Sustained levels are often achieved by the administration of biologically active polypeptides by frequent subcutaneous injections, which often results in fluctuating levels of medicament and poor patient compliance.

However, these sustained release devices can often exhibit high initial bursts of medicament and minimal release thereafter, resulting in serum drug levels outside the therapeutic window and / or poor bioavailability of the medicament.

In addition, the presence of polymer, physiological temperatures and body response to the sustained release composition can cause the medicament to be altered (e.g., degraded, aggregated) thereby interfering with the desired release profile for the medicament.

Further, methods used to form sustained release compositions can result in loss of activity of the medicament due to the instability of the medicament and the degradative effects of the processing steps.

Degradative effects are particularly problematic when the medicament is a polypeptide.

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