GlaxoSmithKline (GSK) has completed its acquisition of Sirtris Pharmaceuticals, Inc. (Sirtris) for approximately USD720 million (or approx. GBP362 million) through a cash tender offer of USD22.50 (or approx. GBP11.33) per share.

Through the acquisition of Sirtris, GSK has significantly enhanced its metabolic, neurology, immunology and inflammation research efforts by establishing a presence in the field of sirtuins, a recently discovered class of enzymes that is believed to be involved in the ageing process. Sirtris will become part of GSK's Drug Discovery organization, while continuing to operate from laboratories in Cambridge, Massachusetts as an autonomous drug discovery unit.