PMID- 32922544 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240329 IS - 1837-9664 (Print) IS - 1837-9664 (Electronic) IS - 1837-9664 (Linking) VI - 11 IP - 20 DP - 2020 TI - Surfactin from Bacillus subtilis attenuates ambient air particulate matter-promoted human oral cancer cells metastatic potential. PG - 6038-6049 LID - 10.7150/jca.48296 [doi] AB - Recently, many studies have indicated that ambient air particulate matter (PM) can increase the risk of oral cancer. The most common malignant tumor in the oral cavity is oral squamous cell carcinoma (OSCC). Usually, cancer cell migration/invasion is the most important cause of cancer mortality. Matrix metalloproteinase-2 (MMP-2) and MMP-9 have been shown to play important roles in regulating metastasis and the tumor microenvironment. Here, we studied the anti-cancer effects of surfactin, a cyclic lipopeptide generated by Bacillus subtilis, on cancer cell migration and invasion. Surfactin suppressed PM-promoted cell migration and invasion and colony formation of SCC4 and SCC25 human oral squamous cell carcinoma cell lines. We observed that PM induced MMP-2 and MMP-9 expression, which was inhibited by surfactin. Transfection with p65, p50, c-Jun, c-Fos, p85, p110, Akt, mammalian target of rapamycin (mTOR), or interleukin-6 (IL-6) siRNA markedly inhibited PM-induced MMP-2 and MMP-9 expression. Moreover, surfactin could reduce Akt, mTOR, p65, and c-Jun activation and IL-6 secretion induced by PM. Finally, we proved that transfection with Akt, p65, or c-Jun siRNA significantly inhibited PM-induced IL-6 release. Taken together, these results suggest that surfactin functions as a suppressor of PM-induced MMP2/9-dependent oral cancer cell migration and invasion by inhibiting the activation of phosphoinositide 3-kinase (PI3K)/Akt/mTOR and PI3K/Akt/nuclear factor-kappaB (NF-kappaB) and activator protein-1 (AP-1)/IL-6 signaling pathways. CI - (c) The author(s). FAU - Vo, Thi Thuy Tien AU - Vo TTT AD - School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan. FAU - Lee, Chiang-Wen AU - Lee CW AD - Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County 61363, Taiwan. AD - Department of Nursing, Division of Basic Medical Sciences, and Chronic Diseases and Health Promotion Research Center, and Research Center for Chinese Herbal Medicine, Chang Gung University of Science and Technology, Puzi City, Chiayi County 61363, Taiwan. AD - Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan. AD - College of Medicine, Chang Gung University, Guishan Dist., Taoyuan City 33303, Taiwan. FAU - Wu, Ching-Zong AU - Wu CZ AD - School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan. FAU - Liu, Ju-Fang AU - Liu JF AD - School of Oral Hygiene, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan. FAU - Lin, Wei-Ning AU - Lin WN AD - Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan. FAU - Chen, Yuh-Lien AU - Chen YL AD - Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei, Taiwan. FAU - Hsu, Lee-Fen AU - Hsu LF AD - Department of Respiratory Care, Chang Gung University of Science and Technology, Puzi City, Chiayi County 613, Taiwan. AD - Division of Neurosurgery, Department of Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County 613, Taiwan. FAU - Tsai, Ming-Horng AU - Tsai MH AD - Department of Pediatrics, Division of Pediatric Hematology/Oncology and Neonatology, Yunlin Chang Gung Memorial Hospital, Yunlin, Taiwan. AD - College of Medicine, Chang Gung University, Taoyuan, Taiwan. FAU - Lee, I-Ta AU - Lee IT AD - School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan. LA - eng PT - Journal Article DEP - 20200818 PL - Australia TA - J Cancer JT - Journal of Cancer JID - 101535920 PMC - PMC7477423 OTO - NOTNLM OT - Invasion OT - Matrix metalloproteinase OT - Oral cancer OT - Particulate matter OT - Surfactin COIS- Competing Interests: The authors have declared that no competing interest exists. EDAT- 2020/09/15 06:00 MHDA- 2020/09/15 06:01 PMCR- 2020/01/01 CRDT- 2020/09/14 05:51 PHST- 2020/05/17 00:00 [received] PHST- 2020/08/06 00:00 [accepted] PHST- 2020/09/14 05:51 [entrez] PHST- 2020/09/15 06:00 [pubmed] PHST- 2020/09/15 06:01 [medline] PHST- 2020/01/01 00:00 [pmc-release] AID - jcav11p6038 [pii] AID - 10.7150/jca.48296 [doi] PST - epublish SO - J Cancer. 2020 Aug 18;11(20):6038-6049. doi: 10.7150/jca.48296. eCollection 2020.