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Molecular mechanism of LncRNA DLX6?AS1 regulates human renal tubular epithelial cell damage and fibrosis induced by high glucose by targeting miR?374a?3p

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Author:
No author available
Journal Title:
Chinese Journal of Diabetes
Issue:
1
DOI:
10.3969/j.issn.1006-6187.2023.01.013
Key Word:
长链非编码生长停滞特异性蛋白6反义RNA1;miR-374a-3p;人肾小管上皮细胞;肾脏纤维化

Abstract´╝Ü 目的 探讨长链非编码生长停滞特异性蛋白6反义RNA1(LncRNA DLX6-AS1)对高糖诱导的人肾小管上皮细胞HK-2损伤及纤维化的影响及其可能作用机制.方法 高糖诱导HK-2细胞建立细胞损伤模型,实验分为正常对照(Con)组、高糖组(HG)、LncRNA DLX6-AS1小分子干扰RNA阴性对照(si-NC)+HG组(si-NC+HG组)、LncRNA DLX6-AS1小分子干扰RNA(si-LncRNA DLX6-AS1)+HG组(si-LncRNA DLX6-AS1+HG组)、miR-374a-3p寡核苷酸模拟物阴性对照mimic NC序列(miR-NC)+HG组(miR-NC+HG组)、miR-374a-3p寡核苷酸模拟物(miR-374a-3p mimics)+HG组(miR-374a-3p+HG组)、miR-374a-3p特异性寡核苷酸抑制剂阴性对照(anti-miR-NC)+si-LncRNA DLX6-AS1+HG组(anti-miR-NC+si-LncRNA DLX6-AS1+HG组)、miR-374a-3p特异性寡核苷酸抑制剂(anti-miR-374a-3p)+si-LncRNA DLX6-AS1+HG组(anti-miR-374a-3p+si-LncRNA DLX6-AS1+HG组).qRT-PCR法检测LncRNA DLX6-AS1、miR-374a-3p表达,ELISA法检测TNF-α、IL-1β水平,双荧光素酶报告实验检测LncRNA DLX6-AS1和miR-374a-3p的靶向关系,Western blot法检测人平滑肌肌动蛋白(α-SMA)、纤维连接蛋白(Fn)、I型胶原α1链(COL1a1)、COL3a1蛋白表达量.结果 转染si-LncRNA DLX6-AS1或miR-374a-3p mimic可降低TNF-α、IL-1β水平和α-SMA、Fn、COL1a1、COL3a1蛋白水平(P<0.05).LncRNA DLX6-AS1可靶向调节miR-374a-3p表达.共转染anti-miR-374a-3p与si-LncRNA DLX6-AS1可恢复转染si-LncRNA DLX6-AS1对HG诱导的HK-2细胞炎症及纤维化作用.结论 干扰LncRNA DLX6-AS1表达可通过上调miR-374a-3p表达抑制高糖诱导的肾小管上皮细胞炎症反应及纤维化.

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