lncRNA MANCR Inhibits NK Cell Killing Effect on Lung Adenocarcinoma by Targeting miRNA-30d-5p

IF 2.6 2区 生物学 Q3 CELL BIOLOGY
Yunping Lu, Xiao Rao, W. Zheng, Yinggan Du, Jianbo Xue, Kan Huang
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Abstract

Background. NK cells are imperative in spontaneous antitumor response of various cancers. Currently, lncRNAs are considered important modulators of the tumor microenvironment. This study investigated the molecular mechanism by which mitotically associated long noncoding RNA (MANCR) controls killing effect of NK cells on lung adenocarcinoma (LUAD) in the tumor microenvironment. Methods. The interplay between MANCR and miRNA-30d-5p was analyzed by bioinformatics. Expression of MANCR mRNA and miRNA-30d-5p was examined using qRT-PCR. Dual-luciferase reporter and RIP assays were utilized to verify the targeted relationship between MANCR and miRNA-30d-5p. To investigate regulation of MANCR/miRNA-30d-5p axis in NK cell killing effect on LUAD cells, western blot tested the protein level of perforin and granzyme B. ELISA determined the level of IFN-γ. CytoTox 96 Non-Radioactive Cytotoxicity Assay kit was applied for cytotoxicity detection of NK cells. Perforin and granzyme B fluorescence intensity was measured via immunofluorescence, and cell apoptosis levels were also revealed via flow cytometry. Results. MANCR was found to be upregulated, while miRNA-30d-5p expression was downregulated in LUAD tissues. Overexpression of MANCR in LUAD cells significantly reduced NK cell IFN-γ secretion, expression of granzyme B and perforin, and NK cell killing effect. In addition, MANCR could target and downregulate miRNA-30d-5p expression, and miRNA-30d-5p overexpression reversed the inhibition of NK cell killing effect caused by MANCR overexpression. Conclusion. MANCR inhibited the killing effect of NK cells on LUAD via targeting and downregulating miRNA-30d-5p and provided new ideas for antitumor therapy based on tumor microenvironment.
lncRNA MANCR通过靶向miRNA-30d-5p抑制NK细胞对肺腺癌的杀伤作用
背景。NK细胞在各种肿瘤的自发抗肿瘤反应中起重要作用。目前,lncrna被认为是肿瘤微环境的重要调节剂。本研究探讨了有丝分裂相关长链非编码RNA (MANCR)在肿瘤微环境中调控NK细胞对肺腺癌(LUAD)杀伤作用的分子机制。方法。生物信息学分析了MANCR与miRNA-30d-5p之间的相互作用。采用qRT-PCR检测MANCR mRNA和miRNA-30d-5p的表达。利用双荧光素酶报告基因和RIP检测来验证MANCR与miRNA-30d-5p之间的靶向关系。为了研究MANCR/miRNA-30d-5p轴在NK细胞对LUAD细胞杀伤作用中的调控作用,western blot检测了穿孔素和颗粒酶b的蛋白水平,ELISA检测了IFN-γ水平。采用CytoTox 96非放射性细胞毒性检测试剂盒对NK细胞进行细胞毒性检测。免疫荧光法检测穿孔素和颗粒酶B荧光强度,流式细胞术检测细胞凋亡水平。结果。在LUAD组织中,MANCR表达上调,而miRNA-30d-5p表达下调。LUAD细胞过表达MANCR可显著降低NK细胞IFN-γ分泌、颗粒酶B和穿孔素的表达,降低NK细胞杀伤作用。此外,MANCR可以靶向并下调miRNA-30d-5p的表达,miRNA-30d-5p过表达逆转了MANCR过表达对NK细胞杀伤的抑制作用。结论。MANCR通过靶向下调miRNA-30d-5p抑制NK细胞对LUAD的杀伤作用,为基于肿瘤微环境的抗肿瘤治疗提供了新的思路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Cellular Microbiology
Cellular Microbiology 生物-微生物学
CiteScore
9.70
自引率
0.00%
发文量
26
审稿时长
3 months
期刊介绍: Cellular Microbiology aims to publish outstanding contributions to the understanding of interactions between microbes, prokaryotes and eukaryotes, and their host in the context of pathogenic or mutualistic relationships, including co-infections and microbiota. We welcome studies on single cells, animals and plants, and encourage the use of model hosts and organoid cultures. Submission on cell and molecular biological aspects of microbes, such as their intracellular organization or the establishment and maintenance of their architecture in relation to virulence and pathogenicity are also encouraged. Contributions must provide mechanistic insights supported by quantitative data obtained through imaging, cellular, biochemical, structural or genetic approaches.
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