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Zebrafish Klf11b is Required to Maintain Cell Viability by Inhibiting p53-Mediated Apoptosis.

Hee Jeong Kong1, Jung Jin Lee2, Ju-Won Kim1

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|August 11, 2022
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Summary

Krüppel-like factor 10 (KLF10) loss-of-function in zebrafish revealed its crucial role in embryonic development. KLF10 negatively regulates p53, impacting apoptosis and tissue homeostasis.

Keywords:
Klf11bKrüppel-like factor 10 (KLF10)Zebrafishp53

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Krüppel-like factor 10 (KLF10) is a transcription factor involved in cellular functions like proliferation, differentiation, apoptosis, and tissue homeostasis.
  • Human KLF10 has homologs in zebrafish, Klf11a and Klf11b, whose specific roles in embryonic development require investigation.

Purpose of the Study:

  • To investigate the function of zebrafish KLF10 homologs, Klf11a and Klf11b, through loss-of-function analysis.
  • To elucidate the role of KLF10 in regulating apoptosis and its relationship with p53 during embryonic development.

Main Methods:

  • Loss-of-function analysis using morpholinos (MO) targeting zebrafish klf11a and klf11b.
  • Assessment of embryonic development, cell death, and expression levels of zebrafish p53 and bax mRNA.
  • Co-injection of klf11b-MO with p53-MO to evaluate the interaction between KLF10 and p53.

Main Results:

  • klf11b-MO injection led to developmental retardation and increased cell death, while klf11a-MO had no significant effect.
  • klf11b-MO induced a marked increase in zebrafish p53 mRNA, potentially leading to elevated bax mRNA levels and apoptosis.
  • Co-injection of klf11b-MO and p53-MO significantly reduced apoptosis in zebrafish embryos.

Conclusions:

  • Zebrafish Klf11b, a homolog of human KLF10, plays a critical role in embryonic development by negatively regulating p53-dependent transcription.
  • The KLF10/p53 complex is implicated in controlling apoptosis, essential for maintaining tissue homeostasis during embryonic development.