SER SERINA THERAPEUTICS INC Investments/Divestments 8-K Filing 2023 - Amended Note with Juvenescence Limited AgeX Therapeutics, Inc. entered into an Amended and Restated Secured Convertible Promissory Note with Juvenescence Limited, allowing AgeX to borrow up to an additional $2,000,000 until May 9, 2023.Get access to all SEC 8-K filings of the SERINA THERAPEUTICS INC