MENLO PARK, Calif.--(BUSINESS WIRE)--Geron Corporation (Nasdaq:GERN) today announced the publication of preclinical data demonstrating that its telomerase inhibitor drug, GRN163L, significantly boosts the effects of trastuzumab (Herceptin™) against HER2-positive breast cancer cells and restores sensitivity to trastuzumab in trastuzumab resistant tumor cells.