Cancer Management and Research (Jan 2021)

CircSKA3 Downregulates miR-1 Through Methylation in Glioblastoma to Promote Cancer Cell Proliferation

  • Zhou M,
  • Li H,
  • Chen K,
  • Ding W,
  • Yang C,
  • Wang X

Journal volume & issue
Vol. Volume 13
pp. 509 – 514

Abstract

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Meng Zhou,1 Huan Li,2 Ke’en Chen,1 Weilong Ding,1 Chengyou Yang,1 Xiangyu Wang1 1Department of Neurosurgery, The First Affiliated Hospital of Jinan University, Guangzhou City, Guangdong Province 510630, People’s Republic of China; 2Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, People’s Republic of ChinaCorrespondence: Xiangyu WangDepartment of Neurosurgery, The First Affiliated Hospital of Jinan University, No. 613 West Huangpu Avenue, Tianhe District, Guangzhou City, Guangdong Province 510630, People’s Republic of ChinaEmail [email protected]: Circular RNA circSKA3 plays an oncogenic role in breast cancer, while its role in glioblastoma (GBM) is unknown. This study aimed to explore the role of circSKA3 in GBM.Methods: Differential expression of circSKA3 and miR-1 in GBM and adjacent non-cancer tissue samples were analyzed by RT-qPCR. GBM cells were transfected with circSKA3 expression vector or miR-1 mimic, followed by RT-qPCR to explore the potential crosstalk between them. Methylation-specific PCR (MSP) was carried out to assess the role of circSKA3 in regulating the methylation of miR-1 gene. The role of circSKA3 and miR-1 in regulating GBM cell proliferation was analyzed by CCK-8 assay.Results: We found that circSKA3 was upregulated in GBM and inversely correlated with miR-1 across GBM tissues. High expression levels of circSKA3 and low expression levels of miR-1 were significantly correlated with the poor survival of GBM patients. In GBM cells, overexpression of circSKA3 increased the methylation of miR-1 gene and decreased the expression of miR-1. CCK-8 assay showed that overexpression of circSKA3 reduced the inhibitory effects of miR-1 on cell proliferation.Conclusion: Therefore, circSKA3 may downregulate miR-1 through methylation in GBM to promote cancer cell proliferation.Keywords: glioblastoma, circSKA3, miR-1, methylation

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