TY - JOUR
T1 - Rectal administration of nonsteroidal antiinflammatory drugs. Effect on rat gastric ulcerogenicity and prostaglandin E2 Synthesis
AU - Ligumsky, M.
AU - Sestieri, M.
AU - Karmeli, F.
AU - Zimmerman, J.
AU - Okon, E.
AU - Rachmilewitz, D.
PY - 1990/5
Y1 - 1990/5
N2 - Oral administration of nonsteroidal antiinflammatory drugs induces gastroduodenal mucosal damage in experimental animals as well as in humans. The aim of the present study was to evaluate the effect of rectally administered nonsteroidal antiinflammatory drugs on gastric mucosal damage, as well as on mucosal prostaglandin E2 synthesis. Fasting male rats were treated intrarectally with 0.5 ml 1% NaHCO3 solution containing several concentrations of either indomethacin, aspirin, ibuprofen, diclofenac, ketoprofen, or sulindac and concomitantly received 1 ml of 150 mM HCL intragastrically. Control rats received intrarectally the vehicle only. After 4 h, lesions in the secretory part of the stomach were scored and mucosal prostaglandin E2 synthesis was determined by the ex vivo prostaglandin generation technique. Dose-dependent mucosal damage was observed in indomethacin- and diclofenac-treated rats. Ketoprofen damage did not show dose dependency. In sulindac- and aspirin-treated rats, as well as in controls, no damage was detected. All drugs induced a significant and comparable degree of inhibition of prostaglandin E2 synthesis. There was no correlation between the severity of the mucosal damage and the inhibition of prostaglandin E2 synthesis. The ulcerogenicity of rectally administered non-steroidal antiinflammatory drugs is therefore not directly related to the degree of inhibition of prostaglandin E2 synthesis and is probably related to the specific chemical and pharmacokinetic properties of each individual drug.
AB - Oral administration of nonsteroidal antiinflammatory drugs induces gastroduodenal mucosal damage in experimental animals as well as in humans. The aim of the present study was to evaluate the effect of rectally administered nonsteroidal antiinflammatory drugs on gastric mucosal damage, as well as on mucosal prostaglandin E2 synthesis. Fasting male rats were treated intrarectally with 0.5 ml 1% NaHCO3 solution containing several concentrations of either indomethacin, aspirin, ibuprofen, diclofenac, ketoprofen, or sulindac and concomitantly received 1 ml of 150 mM HCL intragastrically. Control rats received intrarectally the vehicle only. After 4 h, lesions in the secretory part of the stomach were scored and mucosal prostaglandin E2 synthesis was determined by the ex vivo prostaglandin generation technique. Dose-dependent mucosal damage was observed in indomethacin- and diclofenac-treated rats. Ketoprofen damage did not show dose dependency. In sulindac- and aspirin-treated rats, as well as in controls, no damage was detected. All drugs induced a significant and comparable degree of inhibition of prostaglandin E2 synthesis. There was no correlation between the severity of the mucosal damage and the inhibition of prostaglandin E2 synthesis. The ulcerogenicity of rectally administered non-steroidal antiinflammatory drugs is therefore not directly related to the degree of inhibition of prostaglandin E2 synthesis and is probably related to the specific chemical and pharmacokinetic properties of each individual drug.
UR - http://www.scopus.com/inward/record.url?scp=0025304532&partnerID=8YFLogxK
U2 - 10.1016/0016-5085(90)90340-7
DO - 10.1016/0016-5085(90)90340-7
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C2 - 2323517
AN - SCOPUS:0025304532
SN - 0016-5085
VL - 98
SP - 1245
EP - 1249
JO - Gastroenterology
JF - Gastroenterology
IS - 5 PART 1
ER -