DURHAM, N.C.--(BUSINESS WIRE)--Trimeris, Inc. (Nasdaq: TRMS) (“Trimeris”) today announced that in connection with the Agreement and Plan of Merger dated October 2, 2009, by and among Trimeris, Arigene Co., Ltd. and RTM Acquisition Company (“Arigene” and “Purchaser,” respectively), Arigene has requested through counsel that Trimeris consent to an extension of the expiration date of the tender offer for all of Trimeris’ outstanding shares of common stock commenced by Arigene and the Purchaser on October 19, 2009, pursuant to the terms of the Merger Agreement.