Vol 55, No 3 (2021)
Research Paper
Published online: 2021-02-09

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The relation between plasma miR-126 levels and cerebral collateral circulation in patients with intracranial arterial stenosis

Xiwa Hao123, Shuwan Wang13, Changchun Jiang123, Jingfen Zhang123, Yu Fan123, Jiangxia Pang12, Tianyou Zhang13, Fei Hao1, Junfeng Yang12, Xia Li12, Jiahui Liu12, Baojun Wang123, Yuechun Li123
Pubmed: 33559872
Neurol Neurochir Pol 2021;55(3):281-288.

Abstract

Objective. This study aimed to investigate the correlation between the circulating miR-126 regulation pathway and the cerebral collateral circulation (CCC), and to test whether miR-126 could serve as a potential biomarker for CCC formation in patients with intracranial arterial stenosis or occlusion.

Material and methods. This single-centre cross-sectional study enrolled patients who underwent cerebral angiography with severe stenosis (≥70%) or occlusion in at least one major intracranial artery. Collateral degree was graded according to the ASITN/SIR classification. The patients were divided into a good CCC group (grade 3–4) or a poor CCC group (grade 0–2). We investigated the plasma levels of miR-126, VEGF, Spred-1 and PIK3R2 by using qRT-PCR, ELISA and Western blot methods, respectively. In addition, we assessed the correlations of plasma miR-126 with VEGF, Spred-1, PIK3R2 and ASITN/SIR grade using the Spearman correlation test and investigated its predictive power for CCC status by using the receiver operating characteristic curve.

Results. A total of 68 patients were enrolled (44 with good CCC and 24 with poor CCC). Data showed that plasma miR-126 and VEGF were significantly higher in the good CCC group than in the poor CCC group. Plasma Spred-1 and PIK3R2 level were lower in the good CCC group than in the poor CCC group. In addition, miR-126 and VEGF were positively correlated with ASITN/SIR (miR-126: R = 0.595, P < 0.01; VEGF: R = 0.595, P < 0.01), whereas Spred-1 and PIK3R2 were negatively correlated with ASITN/SIR (Spred-1: R = -0.817, P < 0.01; PIK3R2: R = -0.513, P=0.01). However, the area under the curve of miR-126 level for CCC status was only 0.328 (95% CI: 0.158–0.498; p = 0.067).

Conclusions. Plasma miR-126 level may be related to better CCC formation, one of the mechanisms that may be explained by upregulation of VEGF and reduction of Spred-1 and PIK3R2 protein expression. However, miR-126 might not be an independent predictor for CCC, given its low predictive value.

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Neurologia i Neurochirurgia Polska