THY1 and Alzheimer disease: In terms of similarities, AD-MSC and BM-MSC show the same amount of expression for CD13 (alanyl aminopeptidase, membrane), CD29 (integrin subunit beta), CD73 (5′-nucleotidase ecto), CD90 (Thy-1 cell surface antigen), CD105 (endoglin), and HLA-DR (major histocompatibility complex) [40,42].