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Reduced Expression of RNA Binding Protein CELF2, a Putative Tumor Suppressor Gene in Colon Cancer

Satish Ramalingam1, Prabhu Ramamoorthy, Dharmalingam Subramaniam

  • 1Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas, USA ; Kansas University Cancer Center, University of Kansas Medical Center, Kansas, USA.

Immuno-Gastroenterology
|June 25, 2013
PubMed
Abstract

Insights

CUGBP, Elav-like family member 2 (CELF2) expression is reduced in colon cancer, suggesting this RNA binding protein may act as a tumor suppressor. Lower CELF2 levels are linked to neoplastic transformation and could play a role in tumor initiation.

Area of Science:

  • Oncology
  • Molecular Biology
  • RNA Biology

Background:

  • Colon cancer is a leading cause of cancer death in the US.
  • CUGBP, Elav-like family member 2 (CELF2) is an RNA binding protein involved in posttranscriptional regulation.
  • Previous research indicated low CELF2 expression in colon cancer cells.

Purpose of the Study:

  • To investigate the hypothesis that CELF2 expression is reduced during colon cell neoplastic transformation.
  • To assess the role of CELF2 in colon cancer development.

Main Methods:

  • Immunohistochemical analysis of CELF2 expression.
  • Comparison of CELF2 levels in 40 human colon cancer tissues and 10 normal colon tissues.

Main Results:

  • CELF2 levels were significantly reduced in colon tumor tissues compared to normal intestinal tissues.
  • CELF2 exhibited predominantly nuclear localization in normal cells, with diffused cytoplasmic staining in cancer tissues.
  • These findings suggest CELF2 may function as a tumor suppressor protein.

Conclusions:

  • CELF2 expression is consistently downregulated during neoplastic transformation of colon cells.
  • Reduced CELF2 expression may play a crucial role in colon tumor initiation and progression.
Keywords:
cell deathintestinetumors

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