PMID- 33300377 OWN - NLM STAT- MEDLINE DCOM- 20211115 LR - 20211115 IS - 1477-0903 (Electronic) IS - 0960-3271 (Linking) VI - 40 IP - 6 DP - 2021 Jun TI - LncRNA PART1 promotes lung squamous cell carcinoma progression via miR-185-5p/Six1 axis. PG - 960-976 LID - 10.1177/0960327120979032 [doi] AB - Dysregulation of the long non-coding RNA prostate androgen regulated transcript 1 (lncRNA PART1) is involved in the tumorigenesis of various cancers. However, little is known about its function and molecular mechanism in the development of lung squamous cell carcinoma (LSCC). In this study, we examined the expression of PART1 in LSCC clinical tissue samples and cell lines, and gain- and loss-of-function experiments were performed to explore the function of PART1 in LSCC proliferation, invasion and migration. We found that PART1 was overexpressed in both LSCC tissues and cell lines. Functional studies revealed that PART1 knockdown significantly suppressed cell proliferation, invasion and migration but enhanced apoptosis in LSCC cells, whereas overexpression of PART1 showed the opposite results. Mechanistically, we identified that PART1 acted as a sponge of miR-185-5p, and sineoculis homeobox homolog 1 (Six1) was a direct downstream target of miR-185-5p. Moreover, restoration of miR-185-5p or silencing of Six1 partially abolished the oncogenic effect of PART1 in LSCC cells. Clinically, The areas under the receiver operating characteristic (ROC) curve of PART1, miR-185-5p, and Six1 were 0.7857, 0.7332, 0.8112, respectively. Notably, high PART1, low miR-185-5p, and high Six1 expressions were significantly associated with severe clinical parameters and were the independent risk factors for poor prognosis of LSCC patients. Thus, we concluded that the PART1/miR-185-5p/Six1 axis might serve as a novel biomarker for the diagnosis and treatment of LSCC. FAU - Cao, Y AU - Cao Y AD - Department of Thoracic Surgery, 159431Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China. FAU - Zhang, R AU - Zhang R AD - Department of Thoracic Surgery, 159431Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China. FAU - Luo, X AU - Luo X AD - Department of Thoracic Surgery, 159431Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China. FAU - Yang, Y AU - Yang Y AUID- ORCID: 0000-0003-3167-3171 AD - Department of Thoracic Surgery, 159431Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, China. LA - eng PT - Journal Article DEP - 20201210 PL - England TA - Hum Exp Toxicol JT - Human & experimental toxicology JID - 9004560 RN - 0 (Neoplasm Proteins) RN - 0 (RNA, Long Noncoding) SB - IM MH - Carcinoma, Non-Small-Cell Lung/*genetics/*physiopathology MH - Carcinoma, Squamous Cell/*genetics/*physiopathology MH - Cell Line, Tumor/metabolism MH - China MH - Disease Progression MH - Gene Expression Regulation, Neoplastic MH - Humans MH - Lung Neoplasms/genetics/physiopathology MH - Neoplasm Proteins/*genetics/*metabolism MH - RNA, Long Noncoding/*genetics OTO - NOTNLM OT - Lung squamous cell carcinoma OT - Six1 OT - lncRNA PART1 OT - miR-185-5p EDAT- 2020/12/11 06:00 MHDA- 2021/11/16 06:00 CRDT- 2020/12/10 08:37 PHST- 2020/12/11 06:00 [pubmed] PHST- 2021/11/16 06:00 [medline] PHST- 2020/12/10 08:37 [entrez] AID - 10.1177/0960327120979032 [doi] PST - ppublish SO - Hum Exp Toxicol. 2021 Jun;40(6):960-976. doi: 10.1177/0960327120979032. Epub 2020 Dec 10.