“We are delighted to be joining forces with RXi,” stated Phillip Frost, M.D., OPKO's Chairman and Chief Executive Officer. “RXi has contributed a major advance to the RNAi field with its self-delivering RNAi technology. This technology overcomes a major delivery obstacle of prior RNAi technologies by significantly enhancing the uptake of the gene-targeting drug into cells. We also are impressed with RXi’s development capabilities, as evidenced by its rapid advancement of RXI-109, an exciting product candidate for the potential treatment of dermal scarring.”About OPKO Health, Inc. OPKO is a multinational biopharmaceutical and diagnostics company that seeks to establish industry leading positions in large, rapidly growing markets by leveraging its discovery, development and commercialization expertise and novel and proprietary technologies. About RXi Pharmaceuticals Corporation RXi Pharmaceuticals Corporation (OTC: RXII) is a biotechnology company focused on discovering, developing and commercializing innovative therapies based on its proprietary, self-delivering RNAi platform. Therapeutics that use RNA interference, or “RNAi,” have great promise because of their ability to down-regulate the expression of a specific gene that may be over-expressed in a disease condition. Building on the pioneering work of scientific founder and Nobel Laureate Dr. Craig Mello, a member of the RXi Scientific Advisory Board, RXi’s first RNAi product candidate, RXI-109, which targets CTGF, entered into human clinical development in June 2012. For more information, please visit www.rxipharma.com. Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about future expectations, planned and future development of RXi Pharmaceuticals Corporation’s products and technologies. Forward-looking statements about expectations and development plans of RXi’s products involve significant risks, and uncertainties: risks that RXi may not be able to successfully develop its candidates, or that development of RNAi-based therapeutics may be delayed or not proceed as planned, or that RXi may not successfully develop any RNAi-based products; risks that the development process for RXi’s product candidates may be delayed, risks related to development and commercialization of products by RXi’s competitors, risks related to RXi’s ability to control timing and terms of collaborations with third parties, and the possibility that other companies or organizations may assert patent rights preventing RXi from developing its products. Actual results may differ from those contemplated by these forward-looking statements. RXi does not undertake to update forward-looking statements to reflect a change in its views, events or circumstances that occur after the date of this release.