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  • Title: Natural killer T cell cytotoxic activity in cervical cancer is facilitated by the LINC00240/microRNA-124-3p/STAT3/MICA axis.
    Author: Zhang Y, Li X, Zhang J, Liang H.
    Journal: Cancer Lett; 2020 Apr 01; 474():63-73. PubMed ID: 31904481.
    Abstract:
    Long noncoding RNAs play significant roles in diverse cancers. In this study, we found that LINC00240 expression was markedly increased in cervical cancer. Functional in vitro assays in cervical cancer cells showed that LINC00240 enhanced the growth, migration, and invasion of cervical cancer cells. The target of LINC00240 was confirmed as microRNA(miR)-124-3p. Inhibition of miR-124-3p significantly enhanced cervical cancer progression via targeting of STAT3, which is greatly activated in tumor-infiltrating immune cells. LINC00240 expression was able to induce STAT3 expression via sponging of miR-124-3p, and showed a positive association with STAT3 expression in cervical cancer tissues. MHC class I-related chain (MIC)-A plays a key role in activating natural killer T (NKT) cells and serves as a downstream target of STAT3. Here, MICA was inhibited by up-regulation of LINC00240, and could be rescued by STAT3 knockdown. In addition, LINC00240 overexpression suppressed the cytotoxic activity of NKT cells by affecting the STAT3/MICA axis. Subsequently, we found that LINC00240 expression promoted cervical cancer progression via induction of miR-124-3p/STAT3/MICA-mediated NKT cell tolerance. Considering these findings, we conclude that LINC00240 might be a novel target for cervical cancer.
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