PMID- 36741908 OWN - NLM STAT- MEDLINE DCOM- 20230207 LR - 20230207 IS - 1875-8630 (Electronic) IS - 0278-0240 (Print) IS - 0278-0240 (Linking) VI - 2023 DP - 2023 TI - Tanshinone IIA Inhibits Triple-Negative Breast Cancer Cells MDA-MB-231 via G Protein-Coupled Estrogen Receptor- (GPER-) Dependent Signaling Pathway. PG - 8371623 LID - 10.1155/2023/8371623 [doi] LID - 8371623 AB - Due to the lack of classic estrogen receptors, there has been a shortage of targeted therapy for triple-negative breast cancer (TNBC), resulting in a poor prognosis. However, the newly discovered G protein-coupled estrogen receptor (GPER) has been found to be expressed in TNBC cells. Salvia miltiorrhiza (Danshen) is an essential Chinese medicine for gynecological disorders, and its component tanshinone IIA (Tan IIA) exerts an anticancer effect. Therefore, this study attempted to investigate whether GPER is involved in the inhibitory effect of Tan IIA on TNBC. We applied various databases and GO pathway analysis to predict the possible mechanism of Tan IIA. We identified 39 overlapping targets, including c-Jun, c-Fos, and caspase-3, and enriched cell cycle-related pathways. Next, we demonstrated the strong binding ability of Tan IIA to GPER by molecular docking assay. In the subsequent validation tests, Cell Counting Kit-8 (CCK8) assay showed that Tan IIA inhibited proliferation of MDA-MB-231 cells time and dose dependently without affecting normal cells. Using Transwell plate, flow cytometry, and Western blot assays, we showed that Tan IIA inhibited migration and induced apoptosis of MDA-MB-231 dose dependently. Importantly, protein expressions of GPER, epidermal growth factor receptor (EGFR), extracellular regulated protein kinases (ERK), c-Fos, and c-Jun were all decreased by Tan IIA dose dependently. Administration of GPER inhibitor partly abolished these effects. Furthermore, nuclear translocation of c-Fos and c-Jun as well as cell cycle-related proteins was downregulated by Tan IIA dose dependently. In summary, Tan IIA could inhibit the proliferation and migration of MDA-MB-231 cells and induce apoptosis, and the possible mechanism may be the regulation of GPER-mediated pathways, suggesting that GPER could be a therapeutic target for TNBC. CI - Copyright (c) 2023 Yueshuang He et al. FAU - He, Yueshuang AU - He Y AUID- ORCID: 0000-0002-7449-0212 AD - School of Life Sciences, Beijing University of Chinese Medicine, No. 11 East Road, North 3rd Ring Road, Beijing 100029, China. FAU - Yang, Ke AU - Yang K AD - School of Chinese Medicine, Beijing University of Chinese Medicine, No. 11 East Road, North 3rd Ring Road, Beijing 100029, China. FAU - Liu, Jiao AU - Liu J AD - School of Life Sciences, Beijing University of Chinese Medicine, No. 11 East Road, North 3rd Ring Road, Beijing 100029, China. FAU - Shi, Danning AU - Shi D AD - School of Life Sciences, Beijing University of Chinese Medicine, No. 11 East Road, North 3rd Ring Road, Beijing 100029, China. FAU - Zhang, Zeye AU - Zhang Z AD - School of Life Sciences, Beijing University of Chinese Medicine, No. 11 East Road, North 3rd Ring Road, Beijing 100029, China. FAU - Yang, Jiadi AU - Yang J AD - School of Life Sciences, Beijing University of Chinese Medicine, No. 11 East Road, North 3rd Ring Road, Beijing 100029, China. FAU - Chen, Meng AU - Chen M AD - School of Chinese Medicine, Beijing University of Chinese Medicine, No. 11 East Road, North 3rd Ring Road, Beijing 100029, China. FAU - Zhao, Piwen AU - Zhao P AUID- ORCID: 0000-0001-6993-1135 AD - School of Life Sciences, Beijing University of Chinese Medicine, No. 11 East Road, North 3rd Ring Road, Beijing 100029, China. LA - eng PT - Journal Article DEP - 20230127 PL - United States TA - Dis Markers JT - Disease markers JID - 8604127 RN - 0 (Receptors, Estrogen) RN - 03UUH3J385 (tanshinone) RN - 0 (Receptors, G-Protein-Coupled) RN - EC 3.6.1.- (GTP-Binding Proteins) SB - IM MH - Humans MH - *Receptors, Estrogen/metabolism MH - *Triple Negative Breast Neoplasms/drug therapy/metabolism MH - Molecular Docking Simulation MH - Cell Line, Tumor MH - Signal Transduction MH - Receptors, G-Protein-Coupled/metabolism MH - Apoptosis MH - GTP-Binding Proteins/metabolism/pharmacology MH - Cell Proliferation PMC - PMC9897920 COIS- The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/02/07 06:00 MHDA- 2023/02/08 06:00 PMCR- 2023/01/27 CRDT- 2023/02/06 03:37 PHST- 2022/08/15 00:00 [received] PHST- 2023/01/04 00:00 [revised] PHST- 2023/01/09 00:00 [accepted] PHST- 2023/02/06 03:37 [entrez] PHST- 2023/02/07 06:00 [pubmed] PHST- 2023/02/08 06:00 [medline] PHST- 2023/01/27 00:00 [pmc-release] AID - 10.1155/2023/8371623 [doi] PST - epublish SO - Dis Markers. 2023 Jan 27;2023:8371623. doi: 10.1155/2023/8371623. eCollection 2023.