Open Access

ARTICLE

Tet methylcytosine dioxygenase 2 suppresses renal cell cancer proliferation and metastasis by regulating the miR-200c-SCD axis

by Benjiang Qian¹, Youfeng Huang², Zhenqiang Qiu², Xiaoyan Ying³, Guang Yang¹, Huizhang Li^2,*, Jianming Tan^1,*

1 Fujian Provincial Key Laboratory of Transplant Biology, Department of Urology, Dongfang Hospital (900 Hospital of the Joint Logistics Team), School of Medicine, Xiamen University, Fuzhou, 350025, China
2 Institute of Ningde Urological Research and Department of Urology, Affiliated Mindong Hospital of Fujian Medical University, Fu’an, 355000, China 3 Department of Neurology, Affiliated Mindong Hospital of Fujian Medical University, Fu’an, 355000, China

* Address correspondence to: Jianming Tan, ; Huizhang Li,

BIOCELL 2021, 45(3), 599-615. https://doi.org/10.32604/biocell.2021.014633

Received 14 October 2020; Accepted 21 December 2020; Issue published 03 March 2021

Abstract

Tet methylcytosine dioxygenase 2 (TET2) acts as an antioncogene that is investigated in different cancers. But the effects of TET2 in renal cell cancer (RCC) is still known little. Here, quantitative real-time PCR (qRT-PCR), Western blot, and immunofluorescence were performed to exam gene and protein expression. Cell proliferation was measured using Cell Counting Kit-8 (CCK-8). Transwell assay was performed to detect cell metastasis viability. Flow cytometry was performed to analyze the cell cycle and cell apoptosis. The effects of TET2 on RCC growth in vivo was analyzed using a mouse xenograft model.We found that TET2 and miR-200c were decreased in RCC tissues, and hypermethylation of miR-200c promoter was found. Overexpression of TET2 promoted miR-200c expression by reducing miR-200c promoter methylation. Additionally, overexpression of TET2 or miR-200c suppressed cell growth and metastasis. Also, knockdown of miR-200c could moderate TET2 mediated cell growth inhibition. Furthermore, we found miR-200c directly regulates Stearoyl-CoA desaturase (SCD) gene expression. Moreover, in vivo experiment results confirmed that TET2 inhibited tumor growth. In conclusion, TET2 acts as an antioncogene in RCC by regulating the miR-200c-SCD axis and providing a potential target for RCC diagnosis and treatment.

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