HAIFA, Israel, June 20, 2011 (GLOBE NEWSWIRE) -- Pluristem Therapeutics Inc. (Nasdaq:PSTI) (TASE:PLTR) today announced that its wholly owned subsidiary, Pluristem Ltd., has entered into an exclusive out-license agreement with United Therapeutics Corporation (Nasdaq:UTHR) for the use of Pluristem’s PLacental eXpanded (PLX) cells to develop and commercialize a cell-based product for the treatment of Pulmonary Hypertension (PH).