4.7 Article

Oncogenic role of MiR-130a in oral squamous cell carcinoma

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SCIENTIFIC REPORTS
卷 11, 期 1, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/s41598-021-87388-4

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资金

  1. Department of Biotechnology, New Delhi [BT/PR10272/BRB/10/1266/2013, BT/PR8670/AGR/36/757/2013]
  2. DBT
  3. DST-FIST [SR/FST/LS11-036/2014(C)]
  4. UGC-SAP [F.4.13/2018/DRS-III (SAP-II)]
  5. DBT-IISc Partnership Program Phase-II [BT/PR27952-INF/22/212/2018]

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Aberrant activation of the PI3K/AKT/mTOR pathway is implicated in the pathogenesis of oral squamous cell carcinoma, while the downregulation of TSC1 mediated by oncogenic miR-130a may represent a novel mechanism in oral cancer development. Restoring TSC1 levels by delivering antagomiR-130a could be a potential therapeutic strategy for treating oral cancer.
Aberrant activation of the PI3K/AKT/mTOR pathway is attributed to the pathogenesis of oral squamous cell carcinoma (OSCC). In recent years, increasing evidence suggests the involvement of microRNAs (miRNAs) in oral carcinogenesis by acting as tumor suppressors or oncogenes. TSC1, as a component of the above pathway, regulates several cellular functions such as cell proliferation, apoptosis, migration and invasion. Downregulation of TSC1 is reported in oral as well as several other cancers and is associated with an unfavourable clinical outcome in patients. Here we show that oncogenic miR-130a binds to the 3'UTR of TSC1 and represses its expression. MiR-130a-mediated repression of TSC1 increases cell proliferation, anchorage independent growth and invasion of OSCC cells, which is dependent on the presence of the 3'UTR in TSC1. We observe an inverse correlation between the expression levels of miR-130a and TSC1 in OSCC samples, suggesting that their interaction is physiologically relevant. Delivery of antagomiR-130a to OSCC cells results in a significant decrease in xenograft size. Taken together, the findings of the study indicate that miR-130a-mediated TSC1 downregulation is not only a novel mechanism in OSCC, but also the restoration of TSC1 levels by antagomiR-130a may be a potential therapeutic strategy for the treatment of OSCC.

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