Figure 3

In vitro immunomodulatory effects of hUCMSCs and hUCMSC-EVs on MRL/lpr mouse splenic B cells. Flow cytometric analysis of the proportion of CD19⁺ B cell in splenic mononuclear cells. Data were expressed as the means ± SEM, and were analysed by Kruskal–Wallis test with Dunn's post hoc test, *P < 0.05.