Controlled-release CNS modulating compositions and methods for the treatment of otic disorders

Abstract

Disclosed herein are compositions and methods for the treatment of otic disorders with CNS modulating agent compositions and compositions administered locally to an individual afflicted with an otic disorder, through direct application of these compositions and compositions onto or via perfusion into the targeted auris structure(s).

Description

CROSS-REFERENCE[0001]This application claims the benefit of U.S. Provisional Application No. 61 / 076,567, filed 27 Jun. 2008; U.S. Provisional Application No. 61 / 074,583, filed 27 Jun. 2008; U.S. Provisional Application No. 61 / 082,450, filed 21 Jul. 2008; U.S. Provisional Application No. 61 / 094,384, filed 4 Sep. 2008; U.S. Provisional Application No. 61 / 101,112, filed 29 Sep. 2008; U.S. Provisional Application No. 61 / 140,033, filed 22 Dec. 2008; U.S. Provisional Application No. 61 / 164,812, filed 30 Mar. 2009; and UK Patent Application No. 0907070.7, filed Apr. 24, 2009; all of that are incorporated herein in their entirety.BACKGROUND OF THE INVENTION[0002]Vertebrates have a pair of ears, placed symmetrically on opposite sides of the head. The ear serves as both the sense organ that detects sound and the organ that maintains balance and body position. The ear is generally divided into three portions: the outer ear, auris media (or middle ear) and the auris interna (or inner ear).SUMMA...

AI Technical Summary

Benefits of technology

[0005]The auris compositions and therapeutic methods described herein have numerous advantages that overcome the previously-unrecognized limitations of compositions and therapeutic methods described in prior art.Sterility

[0009]The current standard of care for auris compositions requires multiple administrations of drops or injections (e.g. intratympanic injections) over several days (e.g., up to two weeks), including schedules of receiving multiple injections per day. In some embodiments, auris compositions described herein are controlled-release compositions and are administered at reduced dosing frequency compared to the current standard of care. In certain instances, when an auris composition is administered via intratympanic injection, a reduced frequency of administration alleviates discomfort caused by multiple intratympanic injections in individuals undergoing treatment for a middle and / or inner ear disease, disorder or condition. In certain instances, a reduced frequency of administration of intratympanic injections reduces the risk of permanent damage (e.g., perforation) to the tympanic membrane. The compositions described herein provide a constant, sustained, extended, delayed or pulsatile rate of release of an active agent into the inner ear environment and thus avoid any variability in drug exposure in treatment of otic disorders.Therapeutic Index

[0010]Auris compositions described herein are administered into the ear canal, or in the vestibule of the ear. In some embodiments, access to the vestibular and cochlear apparatus occurs through the auris media (e.g., the round window membrane, the oval window / stapes footplate, the annular ligament and through the otic capsule / temporal bone). Otic administration of the compositions described herein avoids toxicity associated with systemic administration (e.g., hepatotoxicity, cardiotoxicity, gastrointestinal side effects, renal toxicity) of the active agents. In some instances, localized administration in the ear allows an active agent to reach a target (e.g., the inner ear) in the absence of systemic accumulation of the active agent. In some instances, local administration to the ear provides a higher therapeutic index for an active agent that would otherwise have dose-limiting systemic toxicity.Prevention of Drainage into Eustachian Tube

Problems solved by technology

The presence of the BLB limits delivery of active agents (e.g., CNS modulating agents, aural pressure modulators, antimicrobials) to the isolated microenvironment of the inner ear.

In certain instances, a change in the ionic composition of inner ear fluids results in hearing loss, loss of balance and / or ossification of auditory structures.

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