Human Genome Sciences, Inc. today announced that HGS-ETR2 (lexatumumab) was safe and well tolerated in combination with four different standard chemotherapy regimens in a Phase 1b clinical trial in patients with a wide range of cancer types. Objective responses were reported for two patients, and stable disease was observed in 22 patients. The trial was the first reported human study of an antibody to TRAIL receptor 2 in combination with chemotherapy. The results were presented today at the AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics in San Francisco.