IL10 and Alzheimer disease: Besides, we also conducted subgroup analysis according to the MSC tissue source, and the results indicated that both bMSCs and AD-MSCs had a positive adjustment for the expression level of IL10 (SMD = 1.13, 95%CI: 0.08, 2.17, P = 0.03; SMD = 2.81, 95%CI: 1.37, 4.25, P = 0.0001, Fig 6B).