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Horm Metab Res 2023; 55(10): 701-710
DOI: 10.1055/a-2153-7428
Original Article: Endocrine Research

CircPI4KA Overexpression Enhances Carcinogenesis and Glycolysis Metabolism in Papillary Thyroid Carcinoma by Causing the miR-1287-5p-Mediated NRP2 Expression Elevation

Huanhuan Sun
1   Head, Neck and Thoracic Tumor Surgery, Huangshi Central Hospital, Edong Healthcare, Affiliated Hospital of Hubei Institute of Technology, Huangshi, China
,
Fen Xu
2   Otorhinolaryngology Head and Neck Surgery, Huangshi Central Hospital, Edong Healthcare, Affiliated Hospital of Hubei Institute of Technology, Huangshi, China
,
Dongyang You
1   Head, Neck and Thoracic Tumor Surgery, Huangshi Central Hospital, Edong Healthcare, Affiliated Hospital of Hubei Institute of Technology, Huangshi, China
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Abstract

Circular RNAs (circRNAs) are implicated in regulating the pathogenesis of papillary thyroid carcinoma (PTC). Herein, we aimed to investigate how circRNA phosphatidylinositol 4-kinase IIIα (circPI4KA, hsa_circ_0062389) functioned as an oncogene in PTC. CircPI4KA, microRNA-1287-5p (miR-1287-5p) and Neuropilin-2 (NRP2) level detection were completed by reverse transcription-quantitative polymerase chain reaction assay. Cell proliferation was assessed through Cell Counting Kit-8 assay, colony formation assay, and EdU assay. Transwell assay was used for detecting migration and invasion abilities. Cell migration was also determined by wound healing assay. Cell apoptosis was assessed using flow cytometry assay. The protein examination was performed using western blot. Glycolysis was evaluated via commercial kits. Dual-luciferase reporter assay and RNA immunoprecipitation assay were conducted for target analysis. The role of circPI4KA in vivo was explored and analyzed via tumor xenograft assay. CircPI4KA was significantly upregulated in PTC tissues and cells. Knockdown of circPI4KA suppressed proliferation, migration, invasion, glycolysis, and induced apoptosis of PTC cells. CircPI4KA interacted with miR-1287-5p in PTC cells. The antitumor function of circPI4KA downregulation was reversed by inhibition of miR-1287-5p. The miR-1287-5p directly targeted NRP2, and circPI4KA elevated the NRP2 expression by sponging miR-1287-5p. PTC progression was impeded by miR-1287-5p via targeting NRP2. Silencing circPI4KA inhibited tumor growth in vivo through the miR-1287-5p/NRP2 axis. The collective results revealed that circPI4KA induced the upregulation of NRP2 via sponging miR-1287-5p, thus acting as a carcinogenic factor in PTC.

Key words

circPI4KA - miR-1287-5p - papillary thyroid carcinoma

Additional material



Publication History

Received: 16 January 2023

Accepted after revision: 10 August 2023

Article published online:
09 October 2023

© 2023. Thieme. All rights reserved.

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