Disclosed is a method for treating of Cockayne Syndrome (CS). Specifically, the invention pertains to a method for the extracorporeal treatment of a body fluid by removing the body fluid from a living body diseased with CS, and applying a targeted antibody either a mTOR antigen or a DAP1 in a bodily fluid such as blood, creating an antibody-antigen complex, removing antibody-antigen complex from the bodily fluid, and returning the purified bodily fluid to the CS patient.
