VANCOUVER, British Columbia, Aug. 9, 2011 (GLOBE NEWSWIRE) -- Tekmira Pharmaceuticals Corporation (Nasdaq:TKMR) (TSX:TKM), a leading developer of RNA interference (RNAi) therapeutics, along with its collaborators at the United States National Cancer Institute (NCI), announced today that they have received approval from the United States Food and Drug Administration (FDA) to proceed with a new Phase 1 clinical trial for Tekmira’s lead oncology product, TKM-PLK1. This trial, run in parallel with the ongoing Phase 1 trial of TKM-PLK1, provides Tekmira with an early opportunity to validate the drug’s mechanism of action.