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LINC00657"分子海绵吸附"miR-30a-5p调控Skp2表达促进宫颈癌恶性进展

LINC00657 regulates Skp2 expression by functioning as a "molecular sponge" of miR-30a-5p to promote malignant cervical cancer progression

  • 摘要: 目的 LINC00657已被证实在多种癌症中异常表达,但其在宫颈癌中的具体表达模式和功能尚不明确。本研究旨在探讨LINC00657在宫颈癌中的作用及其潜在的分子机制。方法 通过生物信息学分析预测LINC00657与miR-30a-5p、miR-30a-5p与Skp2之间的潜在结合位点,并采用RNA免疫共沉淀和双荧光素酶报告实验进行验证。使用RT-qPCR检测宫颈癌组织和细胞中LINC00657、miR-30a-5p和Skp2的表达水平。通过Western blot检测宫颈癌细胞及裸鼠皮下移植瘤模型中Skp2蛋白表达,免疫组化法分析动物组织中Skp2表达。采用CCK8、伤口愈合实验和Transwell实验评估宫颈癌细胞的增殖、迁移和侵袭能力。结果 LINC00657和Skp2均存在与miR-30a-5p的结合位点。在宫颈癌中,LINC00657和Skp2呈高表达(P<0.05),而miR-30a-5p呈低表达(P<0.05)。实验证实LINC00657可调控Skp2表达,且miR-30a-5p能够靶向作用于Skp2。结论 LINC00657可作为"分子海绵"吸附miR-30a-5p,进而上调Skp2表达促进宫颈癌恶性进展。
     

     

    Abstract: Objective: LINC00657 has been observed to be aberrantly expressed in a variety of cancers. Despite this, the precise expression patterns and functions of LINC00657 in cervical cancer remain elusive. Therefore, the roles and underlying mechanisms of LINC00657 in cervical cancer were investigated in this study. Methods: Bioinformatics analysis predicted potential binding sites between LINC00657 and miR-30a-5p and between miR-30a-5p and Skp2, which were verified using RNA immunoprecipitation and dual-luciferase reporter experiments. LINC00657, miR-30a-5p, and Skp2 expression levels in cervical cancer tissues and cell lines were assessed using RT-qPCR. Additionally, western blotting was used to examine the protein level of Skp2 in cells and subcutaneous xenograft tumor models in nude mice. Immunohistochemistry was used to analyze Skp2 expression in animal tissues. Cellular processes of cervical cancer cell lines were evaluated using CCK8, scratch, and Transwell assays. Results: LINC00657 and Skp2 presented binding sites for miR-30a-5p. In cervical cancer, LINC00657 and Skp2 showed high expression, while miR-30a-5p displayed low expression. LINC00657 was confirmed as a regulator of Skp2 expression, and miR-30a-5p was shown to target Skp2. Conclusion: The role of LINC00657 as a "molecular sponge" was evident, adsorbing miR-30a-5p and thereby upregulating Skp2 to promote cervical cancer progression.

     

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