Researchers at Washington University School of Medicine in St. Louis found further evidence that microglia are the key link between the accumulation of abnormal proteins, including beta-amyloid and tau, in the brain and the actual brain damage observed in Alzheimer’s patients.

Merck announced that it has entered into an exclusive worldwide license agreement with Teijin Pharma for the development, manufacture and commercialization of an investigational preclinical antibody candidate targeting the protein tau. Changes in tau are associated with a number of diseases affecting the nervous system, including Alzheimer’s disease (AD).