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Transforming growth factor-beta3 expression up-regulates on cleft palates induced by

Li-qiang Gan1, Yue-xian Fu, Xing Liu

  • 1Department of Pediatric Surgery, Chongqing Children's Hospital, Chongqing Medical University, Chongqing, China.

Toxicology and Industrial Health
|September 29, 2009
PubMed

Insights

Exposure to 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) can cause cleft palate in fetal mice. This study found TCDD exposure up-regulates transforming growth factor-beta3 (TGF-beta3), suggesting a link to the developmental defect.

Area of Science:

  • Developmental toxicology
  • Molecular biology
  • Teratology

Background:

  • 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a known teratogen that can induce cleft palate, but its precise molecular mechanisms remain unclear.
  • Transforming growth factor-beta3 (TGF-beta3) is crucial for normal palatal shelf development.

Purpose of the Study:

  • To investigate the impact of TCDD exposure on TGF-beta3 expression during palate development.
  • To explore the role of TGF-beta3 modulation in TCDD-induced cleft palate pathogenesis.

Main Methods:

  • Pregnant C57BL/6 mice were administered TCDD or a control vehicle on embryonic day 10.
  • Palatal shelf development was assessed for inhibition.
  • Messenger RNA and protein levels of TGF-beta3 were quantified using RT-PCR and Western blot analysis.

Main Results:

  • TCDD exposure led to significant inhibition of palatal shelf development.
  • Expression of TGF-beta3 was observed to be gradually up-regulated in response to TCDD treatment.
  • A correlation between altered TGF-beta3 levels and TCDD-induced cleft palate was identified.

Conclusions:

  • TCDD exposure can induce cleft palate in mice.
  • The observed up-regulation of TGF-beta3 is implicated in the molecular pathogenesis of TCDD-induced cleft palate.
  • Further research into TGF-beta3 signaling pathways may offer insights into preventing or treating TCDD-related developmental defects.

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