Abstract:
PURPOSE: A cytotoxic T lymphocyte antigen 4-immunoglobulin G (CTLA-4IgG) fusion protein is provided to be effectively conjugated to a lipid vehicle and to suppress T cells, thereby being used as a pharmaceutical composition for suppressing immunity, such as an agent for treating autoimmune diseases. CONSTITUTION: A CTLA-4IgG fusion protein has the C-terminal of immunoglobulin CH3 domain, wherein the amino acid, lysine is substituted with cysteine. The IgG is selected among IgG1, IgG2, IgG3, and IgG4. The CTLA-4IgG fusion protein is conjugated with a lipid vehicle.