CD68 and Parkinson disease: Furthermore, postmortem analyses in PD patients revealed increased expression of inflammatory markers such as human leukocyte antigen (HLA-DR), major histocompatibility complex-II (MHC-II), phagocytic marker CD68, intercellular adhesion molecule-I (ICAM-1), and integrin adhesion molecule (LFA-1) in the substantia nigra [6, 7].