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Tolerx, GSK diabetes drug fails to meet primary endpoint

Tolerx and GlaxoSmithKline's (GSK) drug Otelixizumab has failed to meet primary endpoint in a randomized, placebo-controlled Phase 3 DEFEND-1 study.

Otelixizumab, an investigational humanized anti-CD3 monoclonal antibody, is a targeted T cell immunotherapy being developed for the treatment of type 1 diabetes and other autoimmune diseases.

Following preliminary review of the data, no new or unexpected treatment-related safety concerns have emerged during the DEFEND-1 study.

GSK will continue to explore additional dosing regimens to inform decisions about the future clinical development programme for Otelixizumab.

New recruitment and dosing in the DEFEND-2 study, the ongoing confirmatory Phase 3 study with a design similar to DEFEND-1, has been suspended pending review of the DEFEND-1 results.

Earlier, Tolerx and GSK entered into a pact in In October 2007 for development and commercialization of Otelixizumab for a range of autoimmune and immune-mediated inflammatory diseases, including type 1 diabetes.

Tolerx president and CEO Douglas Ringler said while they are disappointed in the DEFEND-1 results of Otelixizumab, they remain committed to the development and commercialization of the candidates in the pipeline, each of which has a distinct mechanism and target for correcting abnormal immune responses.