XDx, Inc.

XDx, Inc. operates as a molecular diagnostics company which focuses on discovering, developing, and commercializing noninvasive gene expression-based tests for the monitoring of transplant rejection and autoimmune diseases. It focuses on immune-mediated conditions that require life-long monitoring and testing to avoid or to respond to serious complications. The company offers the AlloMap HTx molecular expression test to monitor heart transplant recipients for acute cellular rejection. It is also developing a gene expression-based test, the AlloMap LTx molecular expression test, to monitor for acute cellular rejection in lung transplant recipients. In addition, the company engages in designing a clinical study to create a gene expression test to monitor for disease flares in patients affected by systemic lupus erythematosus. The company was formerly known as Expression Diagnostics, Inc. and changed its name in July 2002. The company is was incorporated in 1998 and is based in Brisbane, California.