lncRNA PICART1 alleviates progression of cervical cancer by upregulating TCF21

Zhao,Yunxia; Dong,Xiuxian; Hou,Rong

doi:10.3892/ol.2020.11486

lncRNA PICART1 alleviates progression of cervical cancer by upregulating TCF21

Authors:
- Yunxia Zhao
- Xiuxian Dong
- Rong Hou
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Affiliations: Department of Gynaecology and Obstetrics, Weifang People's Hospital, Weifang, Shandong 261041, P.R. China
Published online on: March 27, 2020 https://doi.org/10.3892/ol.2020.11486
Pages: 3719-3724
Copyright: © Zhao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Role of long non-coding RNA (lncRNA) PICART1 in alleviating the progression of cervical cancer (CC) via targeting TCF21 was elucidated. PICART1 level in CC and paracancerous tissues was determined by quantitative real-time polymerase chain reaction (qRT-PCR). Its level in CC patients with different tumor stages (stage I+II and stage III+IV) and tumor sizes (≤4 cm and >4 cm) was examined. Survival analysis was conducted in CC patients expressing high level and low level of PICART1. Changes in proliferative, migratory and invasive abilities of HeLa and SiHa cells after transfection of si-PICART1 were assessed. Prognostic value of TCF21 in CC was determined by Kaplan-Meier curves. The interaction between PICART1, TCF21 and ARID1A was investigated through RNA immunoprecipitation (RIP) and Chromatin immunoprecipitation (ChIP) assay. PICART1 was downregulated in CC tissues and cell lines. CC patients with worse TNM staging and larger tumor size presented lower level of PICART1. Low level of PICART1 in CC patients predicted a worse prognosis. Silence of PICART1 stimulated the proliferative, migratory and invasive abilities of HeLa and SiHa cells. TCF21 expression was low in CC tissues and positively regulated by PICART1. Low level of TCF21 in CC patients predicted a worse prognosis. Potential binding relationship was verified among PICART, ARID1A and TCF21. ChIP assay confirmed the decreased enrichment of ARID1A in TCF21 promoter region after PICART1 knockdown. lncRNA PICART1 recruits ARID1A to activate TCF21 expression, thus alleviating the malignant progression of CC.

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