STAT3 and glioblastoma: The results of Western Blot showed that after GBM cells were treated with 9 mg/ml HUC-MSCs supernatants for 48 h, compared with the control group, the ratio of p-STAT3/STAT3 in RG-2, U251, and U87-MG cells was reduced by 33%, 35%, and 48%, respectively.