Serotonin causes acute gastric mucosal injury in rats, probably via 5HT(1D) receptors

GİDENER S., Apaydin S., Kupelioglu A., GÜVEN H., GELAL A., Gure A.

International Journal of Experimental Pathology, cilt.76, sa.4, ss.237-240, 1995 (Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 76 Sayı: 4
  • Basım Tarihi: 1995
  • Dergi Adı: International Journal of Experimental Pathology
  • Derginin Tarandığı İndeksler: Scopus
  • Sayfa Sayıları: ss.237-240
  • Anahtar Kelimeler: Acute gastric mucosal injury, Rat, Serotonin, Serotonin antagonists
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

5-HT-induced acute gastric mucosal injury was assessed in rats by using 5HT1, 5HT2, 5HT3, 5HT4 or muscarinic receptor related drugs. Rats were treated with antagonists i.p. and 30 minutes later either vehicle, 5-HT (20 mg/kg) or other agonists were administered s.c. The stomachs were removed 4 hours after the last injection and mucosal integrity was assessed by light microscopy using a histological ulcer index (HUI). The HUI was found to be significantly increased following 5-HT administration (1.57 ± 0.3) when compared with controls (0.14 ± 0.1). 5HT1 agonist 5-carboxamidotryptamine (20 mg/kg) produced acute gastric erosion and increased the HUI (P < 0.05). The HUI in the animals receiving 5-HT(1D) agonist sumatriptan (7 mg/kg) was found to be 1.62 ± 0.24. 5HT2 antagonist ketanserine (2.5-15 mg/kg), 5HT3 antagonist ondansetron (1-5 mg/kg), 5HT4 antagonist DAU 6285 (1-10 mg/kg) and atropine (1.5-30 mg/kg) exerted no effect whereas 5HT(1/2) antagonist metitepine (0.05-0.5 mg/kg) caused a dose dependent inhibition of the effect of 5-HT. The results from this study demonstrate that 5-HT causes acute gastric mucosal injury and this injury is probably due to the activation of the 5-HT(1D) receptors.