HNRNPAB-regulated lncRNA-ELF209 inhibits the malignancy of hepatocellular carcinoma.
Authors of this article are:
Yang Y, Chen Q, Piao HY, Wang B, Zhu GQ, Chen EB, Xiao K, Zhou ZJ, Shi GM, Shi YH, Wu WZ, Fan J, Zhou J, Dai Z.
A summary of the article is shown below:
Our previous study demonstrated that heterogeneous nuclear ribonucleoprotein AB (HNRNPAB) is a key gene that facilitates metastasis of hepatocellular carcinoma (HCC). However, the molecular mechanisms behind this relationship are not fully understood. In this study, we utilized long noncoding RNA (lncRNA) microarrays to identify a HNRNPAB-regulated lncRNA named lnc-ELF209. Our findings from chromatin immunoprecipitation assays indicate that HNRNPAB represses lnc-ELF209 transcription by directly binding to its promoter region. We also analyzed clinical samples from HCC patients and cell lines with quantitative real-time polymerase chain reactions (qRT-PCR), RNA in situ hybridization, and immunohistochemistry, and found that there is a negative relationship between HNRNPAB and lnc-ELF209 expression. Up-/down-regulation assays and rescue assays indicate that lnc-ELF209 inhibits cell migration, invasion, and epithelial-mesenchymal transition (EMT) regulated by HNRNPAB. This suggests a new regulatory mechanism for HNRNPAB-promoted HCC progression. RNA pull-down and LC-MS/MS were used to determine TPI (triosephosphate isomerase), HSP90AB1 (heat shock protein 90-beta), and vimentin may be involved in the tumor-suppressed function of lnc-ELF209. Furthermore, we found lnc-ELF209 could stabilize TPI protein expression. We also found that lnc-ELF209 overexpression in HCCLM3 cell resulted in a lower rate of lung metastatic, which suggested a less aggressive HCC phenotype. Collectively, these findings offer new insights into the regulatory mechanisms that underlie HNRNPAB cancer-promoting activities and demonstrate that lnc-ELF209 is a HNRNPAB-regulated lncRNA that may play an important role in the inhibition of HCC progression. This article is protected by copyright. All rights reserved.This article is protected by copyright. All rights reserved.
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This article is a good source of information and a good way to become familiar with topics such as: ELF2; HNRNPAB; Hepatocellular carcinoma; lnc-ELF209; lncRNAs.