BERKELEY, Calif., Jan. 7, 2013 (GLOBE NEWSWIRE) -- XOMA Corporation (Nasdaq:XOMA), a leader in the discovery and development of therapeutic antibodies, today announced preliminary top-line data from an interim analysis of its Phase 2 proof-of-concept (POC) study to evaluate the safety and efficacy of gevokizumab, a potent modulator of interleukin-1 beta (IL-1 beta), for the treatment of the inflammatory facial lesions seen in patients with moderate to severe acne vulgaris.