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Basic Information

Classification Information

Regulatory Mechanism		Biological Function		Clinical Application
TF		Immune		Survival
Enhancer		Apoptosis		Drug
Variant		Cell Growth		Circulating
MiRNA		EMT		Metastasis
Methylation		Coding Ability		Recurrence

Cancer&Entry Information

Cancer Name	osteosarcoma
ICD-0-3	NA
Methods	qPCR, Western blot, Luciferase reporter assay, in vitro knockdown, etc.
Sample	OS tissues, Human OS cell lines (Saos-2, U2OS, HOS and MG63) and normal human osteoblast cell line HFOB1.19
Expression Pattern	up-regulated
Function Description	reverse transcription quantitative polymerase chain reaction data demonstrated that XIST was significantly upregulated in OS tissues and cell lines (Saos 2, U2OS, HOS and MG63) compared with adjacent non tumour tissues and normal human osteoblast cell line HFOB1.19. Bioinformatics analysis and luciferase reporter gene assay data demonstrated that XIST could directly target microRNA (miR) 137 and negatively regulate the expression of miR 137 in Saos 2 and U2OS cells. Furthermore, miR 137 was markedly downregulated in OS tissues and cell lines. An inverse association between XIST and miR 137 expression was observed in OS tissues. Knockdown of XIST caused a significant reduction in cell proliferation and invasion and suppressed matrix metalloproteinase (MMP2) and MMP9 protein levels in Saos 2 and U2OS cells. Furthermore, inhibition of miR 137 expression abolished the effects of XIST downregulation on the proliferation and invasion of OS cells. In summary, the present study suggests that XIST promotes OS cell proliferation and invasion by inhibition of miR 137 expression. Thus, XIST may be a potential therapeutic target for the treatment of OS.
Pubmed ID	30651857
Year	2019
Title	Long non-coding RNA XIST serves an oncogenic role in osteosarcoma by sponging miR-137

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