PMID- 32395291 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220414 IS - 2072-1439 (Print) IS - 2077-6624 (Electronic) IS - 2072-1439 (Linking) VI - 12 IP - 4 DP - 2020 Apr TI - miR-107 inhibited malignant biological behavior of non-small cell lung cancer cells by regulating the STK33/ERK signaling pathway in vivo and vitro. PG - 1540-1551 LID - 10.21037/jtd.2020.03.103 [doi] AB - BACKGROUND: The role of miRNAs in non-small cell lung cancer (NSCLC) has been broadly studied and confirmed, and miR-107 has attracted an ever-growing level of attention. This study set out to research the mechanism of the effect of miR-107 on the malignant biological behavior of NSCLC in vivo and vitro. METHODS: The expression of miRNAs related to the development of NSCLC was detected by RT-qPCR. Western blotting was carried out to detect expression levels of serine/threonine kinase 33 (STK33) and proteins related to the extracellular regulated protein kinases (ERK) signaling pathway, while cell proliferation was detected using cell counting kit-8 (CCK-8). The cell apoptosis rate was measured using flow cytometry. The invasion ability was detected by Transwell assay. In vivo tumor growth assays were performed on mice. The expression ERK signaling pathway-related proteins in vivo was evaluated by immunohistochemistry staining. The targeted relationship between miR-107 and STK33 was confirmed by the dual luciferase reporter gene. RESULTS: In NSCLC cell lines and tissues, miR-107 was downregulated. Overexpression of miR-107 inhibited malignant biological behavior of NSCLC cell lines, and suppressed tumor growth in vivo. In addition, STK33 is one of the target genes of miR-107. Therefore, miR-107 suppressed cell proliferation and invasion and promoted tumor growth in vivo and cell apoptosis of NSCLC in vitro. The mechanism was found to be miR-107 targeting STK33, and a lack of STK33 led to the activation of ERK signaling pathway. CONCLUSIONS: miR-107 inhibited malignant biological behavior of NSCLC through regulation of the STK33/ERK signaling pathway. CI - 2020 Journal of Thoracic Disease. All rights reserved. FAU - Wei, Xueqiang AU - Wei X AD - Kunming Medical University, Kunming 650500, China. AD - Department of Thoracic Surgery Iota, the Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Yunnan Cancer Center, The International Cooperation Key Laboratory of Regional Tumor in High Altitude Area, Kunming 650118, China. FAU - Lei, Yujie AU - Lei Y AD - Department of Thoracic Surgery Iota, the Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Yunnan Cancer Center, The International Cooperation Key Laboratory of Regional Tumor in High Altitude Area, Kunming 650118, China. FAU - Li, Minjie AU - Li M AD - Kunming Medical University, Kunming 650500, China. AD - Department of Thoracic Surgery Iota, the Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Yunnan Cancer Center, The International Cooperation Key Laboratory of Regional Tumor in High Altitude Area, Kunming 650118, China. FAU - Zhao, Guangqiang AU - Zhao G AD - Department of Thoracic Surgery Iota, the Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Yunnan Cancer Center, The International Cooperation Key Laboratory of Regional Tumor in High Altitude Area, Kunming 650118, China. FAU - Zhou, Yongchun AU - Zhou Y AD - Department of Thoracic Surgery Iota, the Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Yunnan Cancer Center, The International Cooperation Key Laboratory of Regional Tumor in High Altitude Area, Kunming 650118, China. FAU - Ye, Lianhua AU - Ye L AD - Department of Thoracic Surgery Iota, the Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Yunnan Cancer Center, The International Cooperation Key Laboratory of Regional Tumor in High Altitude Area, Kunming 650118, China. FAU - Huang, Yunchao AU - Huang Y AD - Department of Thoracic Surgery Iota, the Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Yunnan Cancer Center, The International Cooperation Key Laboratory of Regional Tumor in High Altitude Area, Kunming 650118, China. LA - eng PT - Journal Article PL - China TA - J Thorac Dis JT - Journal of thoracic disease JID - 101533916 PMC - PMC7212150 OTO - NOTNLM OT - Non-small cell lung cancer (NSCLC) OT - STK33/ERK signaling pathway OT - cell apoptosis OT - cell invasion OT - cell proliferation OT - miR-107 OT - tumor growth COIS- Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at http://dx.doi.org/10.21037/jtd.2020.03.103). The authors have no conflicts of interest to declare. EDAT- 2020/05/13 06:00 MHDA- 2020/05/13 06:01 PMCR- 2020/04/01 CRDT- 2020/05/13 06:00 PHST- 2020/05/13 06:00 [entrez] PHST- 2020/05/13 06:00 [pubmed] PHST- 2020/05/13 06:01 [medline] PHST- 2020/04/01 00:00 [pmc-release] AID - jtd-12-04-1540 [pii] AID - 10.21037/jtd.2020.03.103 [doi] PST - ppublish SO - J Thorac Dis. 2020 Apr;12(4):1540-1551. doi: 10.21037/jtd.2020.03.103.