WORCESTER, Mass.--(BUSINESS WIRE)--RXi Pharmaceuticals Corporation (Nasdaq: RXII), a biopharmaceutical company pursuing the development and commercialization of proprietary therapeutics based on RNA interference (RNAi), today announced that it has recently acquired direct ownership of technology for which it had previously exercised its option to exclusively license from Advirna LLC. The novel acquired technologies potentially enable in vivo delivery of RNAi therapeutics. Terms of the agreement were not disclosed.