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(A) AO/EB staining. In the ORS+ DKK1 and ORS + si-β-catenin group, the number of apoptotic or necrotic cells decreased. Scale bar = 25 µm. (B) The apoptotic index of the MSCs. The apoptotic indices of the ORS + DKK1 and the ORS + si-β-catenin groups significantly decreased compared with that in the ORS group (# P<0.01). *P<0.01 versus YRS group (n = 4).
