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RNA Pull-down Procedure to Identify RNA Targets of a Long Non-coding RNA
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Long non-coding RNA IQCJ-SCHIP1 antisense RNA 1 is downregulated in colorectal cancer and inhibits cell proliferation

Jia Zhang1,2, Zehua Bian1, Guoying Jin1

  • 1Wuxi Cancer Institute, Affiliated Hospital of Jiangnan University, Wuxi 214062, China.

Annals of Translational Medicine
|June 18, 2019
PubMed
Abstract

Insights

The long non-coding RNA IQCJ-SCHIP1-AS1 is downregulated in colorectal cancer (CRC) and acts as a tumor suppressor. Its reduced expression correlates with poor prognosis, indicating its potential as a prognostic biomarker for CRC patients.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • IQCJ-SCHIP1 antisense RNA 1 (IQCJ-SCHIP1-AS1) is a novel long non-coding RNA (lncRNA) identified in previous expression profiling.
  • The clinical relevance and biological significance of IQCJ-SCHIP1-AS1 in colorectal cancer (CRC) remain largely unexplored.

Purpose of the Study:

  • To investigate the clinical relevance of IQCJ-SCHIP1-AS1 in colorectal cancer (CRC).
  • To elucidate the biological significance and potential mechanisms of IQCJ-SCHIP1-AS1 in CRC progression.

Main Methods:

  • Quantitative RT-PCR was used to measure IQCJ-SCHIP1-AS1 expression in 86 paired CRC tissues.
  • Gain-of-function and loss-of-function studies were conducted to assess the biological roles of IQCJ-SCHIP1-AS1.
  • Bioinformatic analyses including Gene Ontology (GO), KEGG, and GSEA were employed to explore underlying mechanisms.

Main Results:

  • IQCJ-SCHIP1-AS1 was downregulated in 53.5% of CRC tissues and significantly correlated with poor differentiation, advanced tumor depth, lymphatic invasion, and advanced tumor stage.
  • Reduced IQCJ-SCHIP1-AS1 expression was associated with poor prognosis in CRC patients and identified as an independent prognostic factor.
  • Knockdown of IQCJ-SCHIP1-AS1 promoted CRC cell proliferation, cell cycle progression, and impaired apoptosis, with associated gene expression enriched in cell cycle and DNA replication pathways.

Conclusions:

  • IQCJ-SCHIP1-AS1 exhibits a tumor suppressor role in colorectal cancer.
  • IQCJ-SCHIP1-AS1 serves as a potential prognostic biomarker for colorectal cancer.
Keywords:
IQCJ-SCHIP1 antisense RNA 1 (IQCJ-SCHIP1-AS1)Long non-coding RNA (lncRNA)biomarkercolorectal cancer (CRC)

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