N Gao1, F-X Wang, G Wang, Q-S Zhao. 1. The Intensive Care Unit (ICU), Jining No. 1 People's Hospital, Jining, Shandong, China. zq397614@126.com.
Abstract
OBJECTIVE: Previous study reported that miR-498 served as a tumor suppressor in non-small cell lung cancer (NSCLC), but the underlying mechanism remains largely unknown. The aim of this study is to investigate the role of miR-498 and its target gene HMGA2 in NSCLC progression. PATIENTS AND METHODS: The expression of miR-498 was assessed in clinical NSCLC specimens and cell lines using RT-PCR. Overexpression of miR-498 and transfection of pLenti-HMGA2 were performed in A549 cells. Cell proliferation, apoptosis, migration, and invasion were determined using cell counting kit-8 (CCK-8) assay, clone formation assay, flow cytometry, and transwell assay, respectively. Luciferase reporter assays were performed to analyze the regulation of putative target of miR-498. Western blot was used to detect the levels of HMGA2 in A549 cells. RESULTS: MiR-498 was found to be down-regulated in NSCLC tissues and cell lines. After miR-498 mimics transfection, cell proliferation, migration, and invasion were significantly suppressed in the NSCLC cells. Mechanistically, bioinformatic analysis predicted that miR-498 may target the 3'-UTR of HMGA2 and suppressed its translation, and was further confirmed by luciferase assay. Furthermore, restoration of HMGA2 expression completely rescued the inhibitory effect of miR-498 in NSCLC cells. CONCLUSIONS: This paper revealed that miR-498 may serve as a tumor suppressor in NSCLC through targeting HMGA2, suggesting that miR-498 could represent a novel target for effective therapies.
OBJECTIVE: Previous study reported that miR-498 served as a tumor suppressor in non-small cell lung cancer (NSCLC), but the underlying mechanism remains largely unknown. The aim of this study is to investigate the role of miR-498 and its target gene HMGA2 in NSCLC progression. PATIENTS AND METHODS: The expression of miR-498 was assessed in clinical NSCLC specimens and cell lines using RT-PCR. Overexpression of miR-498 and transfection of pLenti-HMGA2 were performed in A549 cells. Cell proliferation, apoptosis, migration, and invasion were determined using cell counting kit-8 (CCK-8) assay, clone formation assay, flow cytometry, and transwell assay, respectively. Luciferase reporter assays were performed to analyze the regulation of putative target of miR-498. Western blot was used to detect the levels of HMGA2 in A549 cells. RESULTS:MiR-498 was found to be down-regulated in NSCLC tissues and cell lines. After miR-498 mimics transfection, cell proliferation, migration, and invasion were significantly suppressed in the NSCLC cells. Mechanistically, bioinformatic analysis predicted that miR-498 may target the 3'-UTR of HMGA2 and suppressed its translation, and was further confirmed by luciferase assay. Furthermore, restoration of HMGA2 expression completely rescued the inhibitory effect of miR-498 in NSCLC cells. CONCLUSIONS: This paper revealed that miR-498 may serve as a tumor suppressor in NSCLC through targeting HMGA2, suggesting that miR-498 could represent a novel target for effective therapies.
Authors: Tayvia Brownmiller; Jamie A Juric; Abby D Ivey; Brandon M Harvey; Emily S Westemeier; Michael T Winters; Alyson M Stevens; Alana N Stanley; Karen E Hayes; Samuel A Sprowls; Amanda S Gatesman Ammer; Mackenzee Walker; Erik A Bey; Xiaoliang Wu; Zuan-Fu Lim; Lin Zhu; Sijin Wen; Gangqing Hu; Patrick C Ma; Ivan Martinez Journal: Cancer Res Date: 2020-07-02 Impact factor: 12.701