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[DNA polymerase delta-interacting protein 38 is a target gene of microRNA-291a-5p]

Deqiu Lin1, Liaohua Lin

  • 1College of Life Science, South China Normal University, Guangzhou 510631, China. lindq168@scnu.edu.cn

Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|November 25, 2010
PubMed

Insights

MicroRNA-291a-5p directly inhibits DNA polymerase delta-interacting protein 38 (PDIP38) expression. This finding reveals a novel regulatory mechanism for PDIP38 during embryonic stem cell differentiation.

Area of Science:

  • Molecular biology
  • Stem cell research
  • Gene regulation

Context:

  • DNA polymerase delta-interacting protein 38 (PDIP38) is crucial for DNA repair and cell migration.
  • Previous studies indicated PDIP38 protein upregulation during mouse embryonic stem cell (ES cell) differentiation without mRNA level changes.
  • This suggests post-transcriptional regulation, potentially involving microRNAs.

Purpose:

  • To investigate the role of microRNAs in regulating PDIP38 expression during ES cell differentiation.
  • To identify specific microRNAs targeting PDIP38.
  • To validate the regulatory relationship between a predicted microRNA and PDIP38.

Summary:

  • Bioinformatic analysis predicted microRNA-291a-5p (miR-291a-5p) as a potential regulator of PDIP38.
  • Luciferase reporter assays, real-time PCR, and Western blot experiments confirmed that miR-291a-5p directly inhibits PDIP38 protein expression.
  • This study demonstrates a direct inhibitory effect of miR-291a-5p on PDIP38.

Impact:

  • Provides novel insights into the post-transcriptional regulation of PDIP38.
  • Elucidates a new mechanism controlling PDIP38 levels during embryonic stem cell differentiation.
  • Establishes miR-291a-5p as a direct inhibitor of PDIP38, opening avenues for further research in stem cell biology and related fields.

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