Serina Therapeutics Submits Complete Response to FDA Clinical Hold Letter for SER-252 Program

Core Insights - Serina Therapeutics has submitted a complete response to the FDA regarding the clinical hold on its lead drug candidate SER-252 for advanced Parkinson's disease, addressing concerns related to a formulation excipient [1][2][3] - The company is targeting the first patient in for the registrational Phase 1b study in Q1 2026, contingent on FDA feedback and resolution of the clinical hold [1][3] Company Overview - Serina Therapeutics is a clinical-stage biotechnology company focused on developing drug candidates for neurological diseases, utilizing its proprietary POZ Platform for drug optimization [4] - The POZ technology is based on a synthetic polymer that enhances drug delivery and stability, potentially improving the efficacy and safety profiles of various therapeutic modalities [5] Drug Development Details - SER-252 is an investigational apomorphine therapy designed to provide continuous dopaminergic stimulation, which may reduce levodopa-related motor complications in Parkinson's disease [8] - The complete response to the FDA includes a detailed data package supporting the use of trehalose as a subcutaneous excipient and a revised protocol for the single ascending dose phase of the trial [7]