Long Noncoding RNA X-Inactive Specific Transcript Facilitates Cellular Functions in Melanoma via miR-139-5p/ROCK1 Pathway

Although X-inactive specific transcript (XIST) is known to play a critical role in the pathogenesis of melanoma, the mechanisms through which this remains unclear. RNAseq, immunohistochemistry, and qRT-PCR were used to identify the levels of XIST, miR-139-5p, and Rho-Associated Coiled-Coil Containin...

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Bibliographic Details
Published in:OncoTargets and therapy 2020-02, Vol.13, p.1277-1287
Main Authors: Tian, Ke, Sun, Dongxia, Chen, Min, Yang, Yifei, Wang, Fang, Guo, Taotao, Shi, Zhimin
Format: Article
Language:English
Subjects:
Antisense RNA
Cancer metastasis
Immunohistochemistry
Melanoma
Original Research
Protein kinases
RNA
RNA sequencing
Tumors
Wound care
Wound healing
Wounds
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Summary:Although X-inactive specific transcript (XIST) is known to play a critical role in the pathogenesis of melanoma, the mechanisms through which this remains unclear. RNAseq, immunohistochemistry, and qRT-PCR were used to identify the levels of XIST, miR-139-5p, and Rho-Associated Coiled-Coil Containing Protein Kinase-1 (ROCK1) in melanoma tissues and cells. A subcellular fractionation assay was used to determine the location of XIST. CCK-8 and colony formation assays were used to evaluate cellular proliferation. Cell migration and wound healing assays were used to detect the effects on cell migration. RNA pull-down was used to confirm the interaction between XIST and miR-139-5p. Besides, the xenograft tumor experiment was performed to further verify the roles of XIST in melanoma. In this study, an increased level of XIST was revealed in melanoma tissues and cells, which was associated with higher TNM stage and positive lymph node metastasis. XIST was found to function as a "molecular sponge" of miR-139-5p to facilitate cellular functions. Moreover, these consequences could be partially reversed by inhibition of miR-139-5p. MiR-139-5p was found to target ROCK1 directly, leading to suppression of ROCK1 expression; this effect could be partially reversed by inhibiting XIST expression. Furthermore, the deletion of ROCK1 induced anti-oncogenic effects similar to those seen with knockout of XIST. Upregulation of miR-139-5p and knockdown of XIST could inhibit cell functions in melanoma. Our findings suggested that the lncRNA XIST facilitates cellular functions in melanoma via the miR-139-5p/ROCK1 pathway.
ISSN:1178-6930
1178-6930
DOI:10.2147/OTT.S225661