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Establishment and Propagation of Human Retinoblastoma Tumors in Immune Deficient Mice
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Long Noncoding RNA LINC00202 Promotes Tumor Progression by Sponging miR-3619-5p in Retinoblastoma

Guigang Yan1, Yi Su2, Zhao Ma2

  • 1Department of Ophthalmology, the Affiliated Yantai Yuhuangding Hospital of Qingdao University.

Cell Structure and Function
|March 26, 2019
PubMed

Insights

High levels of LINC00202 long noncoding RNA correlate with poor prognosis in retinoblastoma (RB). LINC00202 promotes RB progression by interacting with miR-3619-5p, ultimately upregulating RIN1.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Retinoblastoma (RB) is the most common childhood intraocular cancer with a poor prognosis in advanced stages.
  • Identifying novel therapeutic targets for RB is crucial.
  • Long noncoding RNAs (lncRNAs) play significant roles in cancer progression, with LINC00202 implicated in poor RB prognosis.

Purpose of the Study:

  • To investigate the functional role of lncRNA LINC00202 in retinoblastoma (RB) progression.
  • To elucidate the molecular mechanism by which LINC00202 influences RB.
  • To identify potential therapeutic targets for RB treatment.

Main Methods:

  • Quantitative reverse transcription polymerase chain reaction (qRT-PCR) and immunoblotting were used to assess mRNA and protein expression.
  • Cell proliferation, migration, and invasion assays (CCK-8, colony formation, Transwell) were performed.
  • Luciferase reporter and RNA pulldown assays were employed to study RNA interactions and stability.

Main Results:

  • LINC00202 expression was significantly higher in RB tissues compared to adjacent normal tissues and correlated with poor prognosis.
  • LINC00202 depletion inhibited RB cell proliferation, migration, and invasion, while overexpression enhanced these processes.
  • LINC00202 was found to sponge miR-3619-5p, which in turn regulated the expression of the oncogene RIN1. RIN1 knockdown abrogated the pro-tumorigenic effects of miR-3619-5p.

Conclusions:

  • Elevated LINC00202 levels are associated with poor retinoblastoma prognosis.
  • LINC00202 promotes RB progression by sponging miR-3619-5p, leading to increased RIN1 expression.
  • The LINC00202/miR-3619-5p/RIN1 axis represents a potential therapeutic strategy for retinoblastoma.
Keywords:
LINC00202RIN1miR-3619-5pprogressionretinoblastoma

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