GFAP and type 1 diabetes mellitus: Similar autoantibodies and T-cell autoreactivities to the pSC-expressed antigens such as glial fibrillary acidic protein (GFAP) and S100β were found in humans with probable prediabetes and young NOD females [43], indicating that autoimmune targeting pSC may represent an earlier pathogenic process for the initiation of T1D.