N6-Methyladenosine-Modified LEAWBIH Drives Hepatocellular Carcinoma Progression through Epigenetically Activating Wnt/β-Catenin Signaling

Huamei Wei,1,* Lizheng Huang,2,* Qi Lu,2,* Zheng Huang,2 Yanyan Huang,2 Zuoming Xu,3 Wenchuan Li,3 Jian Pu3,4 1Department of Pathology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, People’s Republic of China; 2Graduate College of Youjiang Medical University for Nationalities, Baise, People’s Republic of China; 3Department of Hepatobiliary Surgery, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, People’s Republic of China; 4Guangxi Clinical Medical Research Center of Hepatobiliary Disease, Baise, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jian Pu, Department of Hepatobiliary Surgery, Affiliated Hospital of Youjiang Medical University for Nationalities, No. 18 Zhongshan Two Road, Baise, 533000, People’s Republic of China, Email jian_pu@126.comPurpose: N6-methyladenosine (m6A) modification plays an important role in regulating RNA maturation, stability, and translation. Thus, m6A modification is involved in various pathophysiological processes including hepatocellular carcinoma (HCC). However, the direct contribution of m6A modifications to RNA function in HCC remains unclear. Here, we identified LEAWBIH (long non-coding RNA epigenetically activating Wnt/β-catenin signalling in HCC) as an m6A-modified long non-coding RNA (lncRNA) and investigated the effects of m6A on the function of LEAWBIH in HCC.Methods: Quantitative polymerase chain reaction was performed to measure the gene expression in tissues and cells. The level of m6A modification was detected using a methylated RNA immunoprecipitation assay and single-base elongation- and ligation-based qPCR amplification method. Cell proliferation was evaluated using the Glo cell viability and CCK-8 assays. Cell migration and invasion were evaluated using Transwell migration and invasion assays. The mechanisms of m6A modified LEAWBIH were investigated using chromatin isolation by RNA purification, chromatin immunoprecipitation, and dual-luciferase reporter ...