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General Physiology and Biophysics Vol.40, No.3, p.207–219, 2021 |
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Title: circ-PTTG1IP/miR-671-5p/TLR4 axis regulates proliferation, migration, invasion and inflammatory response of fibroblast-like synoviocytes in rheumatoid arthritis | ||
Author: Lifeng Chen, Hesong Huang, Li Chen, Li Xu, Jianhua Chen, Qiping Lu | ||
Abstract: Circular RNAs (circRNAs) are related to rheumatoid arthritis (RA) development. However, the function and mechanism of circRNA pituitary tumor-transforming 1 interacting protein (circ-PTTG1IP) in RA are unknown. The expression of circ-PTTG1IP in synovial tissues of RA patients and fibroblast-like synoviocytes from RA patients (RA-FLSs) were detected by RT-qPCR. The results uncovered that circ-PTTG1IP was overexpressed in RA patients and RA-FLSs, and circ-PTTG1IP knockdown suppressed cell proliferation, migration, invasion and inflammatory response in RA-FLSs. Besides, we found that circ-PTTG1IP could directly bind to miR-671-5p, and toll-like receptor 4 (TLR4) was a target of miR-671-5p, which was confirmed by dual-luciferase reporter assay. miR-671-5p inhibitor attenuated the effects of circ-PTTG1IP knockdown on RA-FLSs, while the effects of miR-671-5p mimic on RA-FLSs were partly reversed by TLR4 overexpression. Furthermore, circ-PTTG1IP could upregulate TLR4 expression by miR-671-5p. Thus, circ-PTTG1IP knockdown repressed cell proliferation, migration, invasion and inflammatory response in RA-FLSs by regulating the miR-671-5p/TLR4 axis. |
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Keywords: Rheumatoid arthritis — Fibroblast-like synoviocytes — circ-PTTG1IP — miR-671-5p — TLR4 | ||
Published online: 09-Jun-2021 | ||
Year: 2021, Volume: 40, Issue: 3 | Page From: 207, Page To: 249 | |
doi:10.4149/gpb_2021014 |
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