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03 July 2018 : Laboratory Research

[Retracted: 06 Aug 2021] Long Noncoding RNA LINC003121 Inhibits Proliferation and Invasion of Thyroid Cancer Cells by Suppression of the Phosphatidylinositol-3-Kinase (PI3K)/Akt Signaling Pathway

Xiang Min1AE, Kai Liu1BF, Hengtao Zhu1CD, Jian Zhang1A*

DOI: 10.12659/MSM.908652

Med Sci Monit 2018; 24: LBR4592-4601

This article is retracted due to serious flaws detected on figures. Reference: Xiang Min, Kai Liu, Hengtao Zhu, Jian Zhang. Long Noncoding RNA LINC003121 Inhibits Proliferation and Invasion of Thyroid Cancer Cells by Suppression of the Phosphatidylinositol-3-Kinase (PI3K)/Akt Signaling Pathway. Med Sci Monit 2018; 24: LBR4592-4601. 10.12659/MSM.908652

Abstract

BACKGROUND: The aim of this study was to explore the potential effects of long noncoding RNA (lncRNA) LINC003121 on thyroid cancer (TC) cell proliferation and invasion and to explore their possible mechanisms with the involvement of the PI3K/Akt signaling pathway.

MATERIAL AND METHODS: We enrolled 211 thyroid cancer tissues and 70 adjacent normal tissues in this study. TC cell lines K1, SW579, and 8505C and the human thyroid follicular cell line Nthy-ori3-1 were selected and assigned into blank, control vectors, LINC00312 vectors, si-control, and si-LINC00312 groups. Quantitative real-time PCR was used to determine the levels of LINC003121 and Western blotting was used to detect the protein expression of MMP-9, PI3K, t-Akt, and p-Akt. Cell proliferation was assessed by CCK8 assay and EdU incorporation assay, and cell invasion was assessed by Transwell assay.

RESULTS: The expression of LINC00312 was significantly decreased in TC tissues and cell lines. In an in vitro experiment, si-LINC00312 significantly promoted the invasion and proliferation of TC cells. Conversely, overexpression of LINC00312 decreased cell proliferation and invasion in vitro, and decreased tumorigenicity in TC xenograft models in nude mice. LINC00312-mediated tumor suppression in TC cells may occur via suppression of activation of the PI3K/Akt signaling pathway and expression of MMP-9, and the role of MMP-9 expression induced by overexpressed LINC00312 or si-LINC00312 could be weakened by LY294002 (PI3K inhibitor).

CONCLUSIONS: LINC00312 can act as a tumor-suppressor in TC by attenuating the PI3K/Akt signaling pathway, and LINC00312 could be a novel diagnosis biomarker and a promising therapeutic target for TC patients.

Keywords: Retracted Publication

Retraction note

Med Sci Monit 2021; 27:e934231     https://medscimonit.com/abstract/index/idArt/934231
 
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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750