Vaginal LPS changed gene transcriptional regulation response to ischemic reperfusion and increased vulnerability of fetal brain hemorrhage

Yupeng Dong, Yoshitaka Kimura, Takuya Ito, Clarissa Velayo, Takafumi Sato, Rika Sugibayashi, Kiyoe Funamoto, Kudo Hitomi, Keita Iida, Miyuki Endo, Naoaki Sato, Nobuo Yaegashi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

During pregnancy, both ischemic reperfusion and bacterial agent LPS are known risk factors for fetal brain damage. However, there is a lack of evidence to explain whether vaginal LPS affects the fetus response to ischemic reperfusion. Here we reported that there was more than 2 folds higher vulnerability of fetal brain hemorrhage response to ischemic reperfusion when mother mouse was treated with vaginal LPS. As our previously reported, ischemic reperfusion induces P53-dependent fetal brain damage was based on a molecular mechanism: the transcriptional pattern was changed from HIF-1alpha-dependent to P53-dependent immediately. In the present work, only with vaginal LPS precondition, phosphorylation of activated transcriptional factor (ATF) 2 at Thr71 appeared in response to ischemic reperfusion. Moreover, this phosphorylation was completely blocked by pre-treatment with a P53 inhibitor, pifithrin-α. We concluded that vaginal LPS precondition trigged the p53-dependent phosphorylation of ATF2 in response to ischemic reperfusion, which played an important role of increasing vulnerability to hemorrhage in fetus.

Original languageEnglish
Pages (from-to)228-233
Number of pages6
JournalBiochemical and biophysical research communications
Volume468
Issue number1-2
DOIs
Publication statusPublished - 2015 Dec 4

Keywords

  • ATF2
  • FECG
  • Fetal brain hemorrhage
  • Ischemic reperfusion
  • LPS
  • P53

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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