PMID- 32805233 OWN - NLM STAT- MEDLINE DCOM- 20201201 LR - 20201201 IS - 1525-2191 (Electronic) IS - 0002-9440 (Linking) VI - 190 IP - 11 DP - 2020 Nov TI - S100A4/Nonmuscle Myosin IIA/p53 Axis Contributes to Aggressive Features in Ovarian High-Grade Serous Carcinoma. PG - 2304-2316 LID - S0002-9440(20)30373-4 [pii] LID - 10.1016/j.ajpath.2020.07.014 [doi] AB - S100A4 is a small calcium-binding protein that exerts its biological functions by interacting with nonmuscle myosin IIA (NMIIA) and p53. Although S100A4 promotes metastasis in several tumors, little is known about its involvement in the progression of ovarian high-grade serous carcinomas (HGSCs). Herein, we focused on functional roles of the S100A4/NMIIA/p53 axis in these tumors. In HGSC cell lines harboring mutant p53, knockdown (KD) of S100A4 reduced the expression of several epithelial-mesenchymal transition/cancer stem cell markers and the ALDH1(high) population, consistent with an inhibition of stemness features. S100A4-KD also increased apoptosis, decreased cell proliferation, and accelerated cell mobility. This was accompanied by increased Snail expression, which, in turn, was likely due to loss of p53 function. In contrast, specific inhibition of NMIIA by blebbistatin induced phenotypes that-with the exception of cell proliferation and mobility-were opposite to those observed in S100A4-KD cells. In clinical samples, cytoplasmic and/or nuclear interactions between S100A4, NMIIA, and mutant p53 were observed. In addition, high expression of S100A4, but not NMIIA or p53, was a significant and independent unfavorable prognostic factor in HGSC patients. These findings suggest that, via its interaction with NMIIA and p53, overexpressed S100A4 may induce epithelial-mesenchymal transition/cancer stem cell properties in HGSC and elicit several other tumor-associated phenotypes. CI - Copyright (c) 2020 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved. FAU - Hiruta, Ai AU - Hiruta A AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Oguri, Yasuko AU - Oguri Y AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Yokoi, Ako AU - Yokoi A AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Matsumoto, Toshihide AU - Matsumoto T AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Oda, Yusuke AU - Oda Y AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Tomohiro, Mikihisa AU - Tomohiro M AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Hashimura, Miki AU - Hashimura M AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Jiang, Zesong AU - Jiang Z AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Tochimoto, Masataka AU - Tochimoto M AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Nakagawa, Mayu AU - Nakagawa M AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. FAU - Saegusa, Makoto AU - Saegusa M AD - Department of Pathology, Kitasato University School of Medicine, Sagamihara, Japan. Electronic address: msaegusa@med.kitasato-u.ac.jp. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200815 PL - United States TA - Am J Pathol JT - The American journal of pathology JID - 0370502 RN - 0 (S100 Calcium-Binding Protein A4) RN - 0 (SNAI1 protein, human) RN - 0 (Snail Family Transcription Factors) RN - 0 (TP53 protein, human) RN - 0 (Tumor Suppressor Protein p53) RN - 142662-27-9 (S100A4 protein, human) RN - EC 3.6.1.- (Nonmuscle Myosin Type IIA) SB - IM MH - Cell Line, Tumor MH - Cell Movement MH - Cell Proliferation MH - Cystadenocarcinoma, Serous/*metabolism/pathology MH - Epithelial-Mesenchymal Transition MH - Female MH - Gene Expression Regulation, Neoplastic MH - Humans MH - Neoplastic Stem Cells/*metabolism/pathology MH - Nonmuscle Myosin Type IIA/*metabolism MH - Ovarian Neoplasms/*metabolism/pathology MH - S100 Calcium-Binding Protein A4/*metabolism MH - *Signal Transduction MH - Snail Family Transcription Factors/biosynthesis MH - Tumor Suppressor Protein p53/*metabolism EDAT- 2020/08/18 06:00 MHDA- 2020/12/02 06:00 CRDT- 2020/08/18 06:00 PHST- 2020/05/09 00:00 [received] PHST- 2020/07/02 00:00 [revised] PHST- 2020/07/21 00:00 [accepted] PHST- 2020/08/18 06:00 [pubmed] PHST- 2020/12/02 06:00 [medline] PHST- 2020/08/18 06:00 [entrez] AID - S0002-9440(20)30373-4 [pii] AID - 10.1016/j.ajpath.2020.07.014 [doi] PST - ppublish SO - Am J Pathol. 2020 Nov;190(11):2304-2316. doi: 10.1016/j.ajpath.2020.07.014. Epub 2020 Aug 15.