Bone Marrow Mesenchymal Stem Cells (BMSC) Exosome-Derived mR-512-5p Inhibits the Proliferation and Apoptosis of Glioblastoma Cells

Abstract

This study discusses the mechanism of miR-512-5p derived from BMSC in restraining the proliferation and prompting apoptosis of GBM. BMSC exosome was obtained through ultra-centrifugation and assessed by TEM. The positive presentation of CD63 and HSP70 was detected with Western Blot. The GBM cell line LN229 was divided into WM set, NC set, and ZR set followed by analysis of cell proliferation by MTT method, invasive ability by Tranwell chamber, apoptotic rate by FCM and the expression of JAG1 and notch2 by Western Blot. miR-512-5p level in LN229 cells was significantly lower than U87MG and SHG44 cells. There was positive expression of CD63 and HSP70 in exosome. LN229 cell proliferation was restrained by the drug. ZR set had lower cell proliferation rate and invasive quantity and higher apoptotic rate than WM set and NC set. The protein expressions of JAG1 and notch2 in ZR set was reduced compared with WM set and NC set (P <0.05) without difference between NC set and WM set (P >0.05). In conclusion, GBM cell proliferation could be restrained and apoptosis could be increased by miR-512-5p derived from BMSC through targeting JAG1. It could provide a brand-new therapeutic strategy for the treatment on GBM.