Astragaloside IV - mediated endothelial progenitor cell exosomes promote autophagy and inhibit apoptosis in hyperglycemic damaged endothelial cells via miR-21/PTEN axis. - Xiong W; Huang XL; Li CY; Wang XL; Lan HW; Wang TT; Chen ZL; Yang QP; Hu AL; Xia YF; Zhu FR; Zhou ZZ (Folia histochemica et cytobiologica, 2022)