Elevated Circulating LINC-P21 Serves as a Diagnostic Biomarker of Type 2 Diabetes Mellitus and Regulates Pancreatic β-cell Function by Sponging miR-766-3p to Upregulate NR3C2

Zhibin Cao; Fuwang Yao; Yuqin Lang; Xueqiang Feng

doi:10.1055/a-1247-4978

Experimental and Clinical Endocrinology & Diabetes, Inhaltsverzeichnis

Exp Clin Endocrinol Diabetes 2022; 130(03): 156-164
DOI: 10.1055/a-1247-4978

Article

Elevated Circulating LINC-P21 Serves as a Diagnostic Biomarker of Type 2 Diabetes Mellitus and Regulates Pancreatic β-cell Function by Sponging miR-766-3p to Upregulate NR3C2

Zhibin Cao

¹Department of Endocrinology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong

,

Fuwang Yao

²Department of Anesthesiology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong

,

Yuqin Lang

³Department of Endoscopic Outpatient Operating Room, Affiliated Hospital of Weifang Medical University, Weifang, Shandong

,

Xueqiang Feng

⁴Vascular Intervention Department, Affiliated Hospital of Weifang Medical University, Weifang, Shandong

› Institutsangaben

Abstract

Objective The purpose of this study was to evaluate the clinical value and biological function of long non-coding RNA (lncRNA) LINC-P21 in type 2 diabetes mellitus (T2DM), and explore the underlying mechanisms.

Methods The expression of LINC-P21 was estimated using quantitative real-time PCR. The functional role of LINC-P21 was explored by gain- and loss-of-function experiments. INS-1 cell proliferation was analyzed using a cell counting kit-8 (CCK-8)assay, and the glucose-stimulated insulin secretion was measured using an ELISA kit. The miRNAs that might be sponged by LINC-P21 were analyzed, and the subsequent target genes were predicted and assessed in INS-1 cells.

Results Serum expression of LINC-P21 was elevated in T2DM patients, which was correlated with fasting blood glucose levels and disease diagnosis. The glucose-stimulated insulin secretion and the proliferation of INS-1 cells were enhanced by LINC-P21 knockdown, but the overexpression of LINC-P21 led to opposite effects. miR-766-3p could be directly inhibited by LINC-P21 in INS-1 cells and reverse the effects of LINC-P21 on β-cell function. Additionally, NR3C2 was determined as a target of miR-766-3p, which could be positively regulated by LINC-P21 and had same effects with LINC-P21 on INS-1 cell proliferation and insulin secretion.

Conclusion All the data demonstrated that serum elevated LINC-P21 and decreased miR-766-3p serve as candidate diagnostic biomarkers in T2DM patients. LINC-P21 acts as a potential regulator in insulin secretion and proliferation of pancreatic β-cells through targeting miR-766-3p to upregulate NR3C2.

Key words

Type 2 diabetes mellitus - LINC-P21 - MicroRNA-766-3p - NR3C2 - Pancreatic β-cell - Proliferation

Volltext

Referenzen

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