Abstract
Background
Hepatocellular carcinoma (HCC) is the sixth most commonly diagnosed malignant tumor and the fourth leading cause of cancer-related deaths worldwide. As a novel non-coding RNA, LINC00657 was firstly identified as an oncogenic role in breast cancer. However, few research focus on the effect of LINC00657 on the progression of HCC.
Objectives
The purpose of this study was to investigate the effect of LINC00657 on HCC tissues and cells, and further explore the potential mechanism.
Methods
We first measured the expression of LINC00657 in HCC tissues and cell lines using qRT-PCR. Next we established LINC00657 knockdown in HCC cells. CCK-8 assay, cell invasion assay, flow cytometry analysis, qRT-PCR and western blotting were applied to assess the role of LINC00657 knockdown in the biological behavior of HCC cells. The bioinformatics analysis and the rescue experiment were devoted to the underlying mechanism.
Results
LINC00657 was remarkably overexpressed in HCC tissues and cell lines, associated with poor prognosis. LINC00657 knockdown repressed cell proliferation and invasion, promoted cell apoptosis of HCC cell lines. The bioinformatics analysis showed LINC00657 sponged miR-424 as a ceRNA. Besides, PD-L1 mimic rescued the suppression of si-LINC00657 in the biological behavior of HCC cells.
Conclusion
In a word, we observed LINC00657 regulated PD-L1 expression by sponging miR-424, thus affecting the developments of hepatocellular carcinoma. These findings LINC00657 may provide new evidence for therapeutic application in hepatocellular carcinoma.
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Availability of data and materials
The datasets used and/or analyzed during the present study are available from the corresponding author on reasonable request.
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Acknowledgement
In compliance with the ethics committee of the First Affiliated Hospital of Xinjiang Medical University, all patients provided written consent for the use of their tissues in this study.
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TT designed experiments; XLC, GPZ and TL performed experiments; CGZ and LB analyzed the data; JMZ wrote the manuscript. All authors read and approved the manuscript.
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Xinling Cao, Guanping Zhang, Tao Li, Chengming Zhou, Lei Bai, Jinming Zhao and Turgunjan Tursun declare that they have no conflict of interest.
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Cao, X., Zhang, G., Li, T. et al. LINC00657 knockdown suppresses hepatocellular carcinoma progression by sponging miR-424 to regulate PD-L1 expression. Genes Genom 42, 1361–1368 (2020). https://doi.org/10.1007/s13258-020-01001-y
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DOI: https://doi.org/10.1007/s13258-020-01001-y