THY1 and Alzheimer disease: All three types of MSCs ubiquitously expressed CD105, CD73, and CD90 (CD105: 95.41% in BM-MSCs, 95.08% in AD-MSCs, and 91.91% in SM-MSCs; CD73: 97.17% in BM-MSCs, 94.67% in AD-MSCs, and 99.73% in SM-MSCs; CD90: 99.39% in BM-MSCs, 99.85% in AD-MSCs, and 98.73% in SM-MSCs) (Figure 3).