Abdominal surgery-induced delayed gastric emptying in rats

Role of CRF and sensory neurons

E. Barquist, M. Zinner, J. Rivier, Y. Tache

Research output: Contribution to journalArticle

Abstract

The role of peripheral corticotropin-releasing factor (CRF) and afferent pathways in mediating abdominal surgery-induced delayed gastric emptying was investigated using an intravenous injection of the competitive CRF antagonist α-helical CRF9-41 and capsaicin pretreatment in adult fasted rats. Gastric emptying of a non-caloric solution was measured by the phenol red method. Intravenous CRF (0.13 nmol) inhibited by 65% gastric emptying. CRF effect was completely reversed by simultaneous intravenous injection of α- helical CRF9-41 (13 nmol). Abdominal surgery under enflurane anesthesia inhibited gastric emptying by 60% measured 3 h postoperatively. Enflurane anesthesia alone had no effect on gastric emptying 3 h after exposure. Abdominal surgery-induced delay of gastric emptying was reversed by 46, 60, and 100% by capsaicin pretreatment (125 mg/kg, -3 wk), intravenous injection of α-helical CRF9-41 (13 nmol), and combined pretreatments with capsaicin and CRF antagonist, respectively. Capsaicin and α-helical CRF9- 41 given alone or in combination did not influence gastric emptying. These results indicate that peripheral CRF receptors along with capsaicin-sensitive afferent neurons contribute to somatovisceral stress (abdominal surgery)- induced delayed gastric emptying.

Original languageEnglish (US)
JournalAmerican Journal of Physiology - Gastrointestinal and Liver Physiology
Volume262
Issue number4 25-4
StatePublished - 1992
Externally publishedYes

Fingerprint

Gastric Emptying
Corticotropin-Releasing Hormone
Sensory Receptor Cells
Capsaicin
Intravenous Injections
Enflurane
Anesthesia
Phenolsulfonphthalein
Corticotropin-Releasing Hormone Receptors
Afferent Pathways
Afferent Neurons

Keywords

  • capsaicin
  • corticotropin-releasing factor antagonist
  • enflurane
  • stress

ASJC Scopus subject areas

  • Physiology
  • Gastroenterology

Cite this

Abdominal surgery-induced delayed gastric emptying in rats : Role of CRF and sensory neurons. / Barquist, E.; Zinner, M.; Rivier, J.; Tache, Y.

In: American Journal of Physiology - Gastrointestinal and Liver Physiology, Vol. 262, No. 4 25-4, 1992.

Research output: Contribution to journalArticle

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