MENLO PARK, Calif.--(BUSINESS WIRE)--Geron Corporation (Nasdaq: GERN) today announced that it enrolled its first patient in a clinical trial of GRN163L in multiple myeloma. The trial is the fourth underway involving Geron’s novel inhibitor of telomerase, an enzyme that is expressed in all major types of cancer cells. The primary objective of the Phase I/II study is to determine the safety and maximum tolerated dose (MTD) of GRN163L when administered intravenously in patients with multiple myeloma who have failed at least two courses of standard chemotherapy. In addition, researchers will perform correlative laboratory studies on primary patient samples to characterize the effects of GRN163L on myeloma cancer cells.