THE WOODLANDS, Texas--(BUSINESS WIRE)--Opexa Therapeutics, Inc. (NASDAQ:OPXA), a company involved in the development and commercialization of cell therapies, today announced a recent poster presentation at the 2008 Annual Meeting of the International Society of Cell Therapy held in Miami May 17th–20th. The poster, titled “Persistence of Myelin Reactive T-cells in Relapsing-Remitting Multiple Sclerosis Patients Receiving Immunomodulatory Treatment” was presented on Monday, May 19th.