XIAOPI formula promotes breast cancer chemosensitivity via inhibiting CXCL1/HMGB1-mediated autophagy

Publication date: December 2019Source: Biomedicine & Pharmacotherapy, Volume 120Author(s): Neng Wang, Bowen Yang, Gulizeba Muhetaer, Shengqi Wang, Yifeng Zheng, Jiahong Lu, Min Li, Fengxue Zhang, Honglin Situ, Yi Lin, Zhiyu WangAbstractXIAOPI formula is a national approved drug prescribed to patients with high breast cancer risk. Previously we demonstrated that XIAOPI formula could inhibit breast cancer metastasis via suppressing CXCL1 expression, and postulated that “autophagy in cancer” might be one of its most core anti-cancer mechanisms. However, whether XIAOPI formula could be simultaneously applied with chemodrugs and their synergistic mechanisms are still remained unknown. In the present study, XIAOPI formula at non-cytotoxic doses could synergistically enhance the chemosensitivity of breast cancer cells MDA-MB-231 and MCF-7. We found that rapamycin-induced autophagy could reduce the chemosensitivity of breast cancer cells to XIAOPI formula, and the autophagy suppression and chemosensitizing activity of this formula was CXCL1-dependent. The evidence came from that XIAOPI formula was associated with a lower expression of CXCL1 combined with either rapamycin or taxol alone. Besides, the inhibitory effect of XIAOPI formula on the LC3-II and ABCG2 signals was weakened following CXCL1 over-expression, whereas P62 upregulation induced by XIAOPI formula was re-declined. A high throughput ­ qPCR (HT-qPCR) assay identified HMGB1 as the main autophagic target of XIAOPI ...
Source: Biomedicine and Pharmacotherapy - Category: Drugs & Pharmacology Source Type: research