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LncRNA HEIH/miR‐939‐5p interplay modulates triple‐negative breast cancer progression through NOS2‐induced nitric oxide production
Journal of Cellular Physiology ( IF 4.5 ) Pub Date : 2020-12-23 , DOI: 10.1002/jcp.30234
Heba Nafea 1 , Rana A Youness 2 , Khaled Abou-Aisha 3 , Mohamed Z Gad 1
Affiliation  

This study aimed to unravel the regulatory role of noncoding RNAs (ncRNA) on the nitric oxide (NO) machinery system in triple‐negative breast cancer (TNBC) patients and to further assess the influence of NO‐modulating ncRNAs on TNBC progression, immunogenic profile, and the tumor microenvironment (TME). The results revealed miR‐939‐5p and lncRNA HEIH as novel ncRNAs modulating NO machinery in TNBC. MiR‐939‐5p, an underexpressed microRNA (miRNA) in BC patients, showed an inhibitory effect on NOS2 and NOS3 transcript levels on TNBC cells. In contrast, HEIH was found to be markedly upregulated in TNBC patients and showed a modulatory role on miR‐939‐5p/NOS2/NO axis. Functionally, miR‐939‐5p was characterized as a tumor suppressor miRNA while HEIH was categorized as a novel oncogenic lncRNA in TNBC. Finally, knocking down of HEIH resulted in improvement of immunogenic profile of TNBC cells through inducing MICA/B and suppressing the immune checkpoint inhibitor PDL1. In the same context, knockdown of HEIH resulted in the alleviation of the immune‐suppressive TME by repressing interleukin‐10 and tumor necrosis factor‐α levels. In conclusion, this study identifies miR‐939‐5p as a tumor suppressor miRNA while HEIH as an oncogenic lncRNA exhibiting its effect through miR‐939‐5p/NOS2/NO axis. Therefore, repressing BC hallmarks, improving TNBC immunogenic profile, and trimming TME.

中文翻译:

LncRNA HEIH/miR-939-5p 相互作用通过 NOS2 诱导的一氧化氮产生调节三阴性乳腺癌进展

本研究旨在阐明非编码 RNA (ncRNA) 对三阴性乳腺癌 (TNBC) 患者一氧化氮 (NO) 机制系统的调节作用,并进一步评估 NO 调节 ncRNA 对 TNBC 进展、免疫原性谱的影响,以及肿瘤微环境(TME)。结果显示 miR-939-5p 和 lncRNA HEIH 是调节 TNBC 中 NO 机制的新型 ncRNA。MiR-939-5p 是 BC 患者中一种低表达的 microRNA (miRNA),对 TNBC 细胞上的 NOS2 和 NOS3 转录水平有抑制作用。相反,发现 HEIH 在 TNBC 患者中显着上调,并对 miR-939-5p/NOS2/NO 轴显示出调节作用。在功能上,miR-939-5p 被表征为肿瘤抑制 miRNA,而 HEIH 被归类为 TNBC 中的新型致癌 lncRNA。最后,通过诱导 MICA/B 和抑制免疫检查点抑制剂 PDL1,敲除 HEIH 可改善 TNBC 细胞的免疫原性特征。在相同的背景下,HEIH 的敲低通过抑制白细胞介素-10 和肿瘤坏死因子-α 水平导致免疫抑制性 TME 的缓解。总之,本研究将 miR-939-5p 鉴定为肿瘤抑制 miRNA,而 HEIH 作为致癌 lncRNA,通过 miR-939-5p/NOS2/NO 轴显示其作用。因此,抑制 BC 特征、改善 TNBC 免疫原性特征和修剪 TME。总之,本研究将 miR-939-5p 鉴定为肿瘤抑制 miRNA,而 HEIH 作为致癌 lncRNA,通过 miR-939-5p/NOS2/NO 轴显示其作用。因此,抑制 BC 特征、改善 TNBC 免疫原性特征和修剪 TME。总之,本研究将 miR-939-5p 鉴定为肿瘤抑制 miRNA,而 HEIH 作为致癌 lncRNA,通过 miR-939-5p/NOS2/NO 轴显示其作用。因此,抑制 BC 特征、改善 TNBC 免疫原性特征和修剪 TME。
更新日期:2020-12-23
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