Normal ventilation and ventilatory responses to chemical stimuli in juvenile mutant mice deficient in endothelin-3

Akira Nakamura, Tomoyuki Kuwaki, Takayuki Kuriyama, Masashi Yanagisawa, Yasuichiro Fukuda

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Congenital central hypoventilation syndrome (CCHS) and Hirschsprung's disease (HSCR) are often classified as neurocristopathies and are thought to share a common molecular pathogenesis related to the genes that control the development of neural crest cells. We examined whether endothelin-3 (ET-3), one of the developmental regulators of neural crest cells and of which null mutation results in aganglionic megacolon in mice, fulfills the requirements for such a common molecule. To investigate the possible involvement of ET-3 in central ventilatory control, we measured ventilation in mutant mice deficient in ET-3 by whole body plethysmography. Tidal volume and breathing frequency were measured during breathing of room air, hypoxic, hyperoxic, or hypercapnic gas mixtures in awake and anesthetized mice. There were no significant differences in resting ventilation as well as ventilatory responses to hypoxia and hypercapnia between ET-3-knockout mice and wild-type mice. Our results indicate that ET-3 can not be considered as a common pathogenic mechanism for CCHS and HSCR at least in mice. (C) 2000 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)1-9
Number of pages9
JournalRespiration Physiology
Volume124
Issue number1
DOIs
StatePublished - 2000

Keywords

  • Control of breathing, central
  • Development, neural crest
  • Disease, Hirschsprung
  • Disease, congenital central hypoventilation syndrome
  • Mammals, mouse
  • Mediators, endothelin-3
  • Mutation, endothelin-3

ASJC Scopus subject areas

  • Physiology
  • Pulmonary and Respiratory Medicine

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