The effect of granulocyte macrophage colony stimulating factor on the prostaglandin E-2-like activity of the small intestine of rat during total bodyirradiation
D. Kilic et H. Sayan, The effect of granulocyte macrophage colony stimulating factor on the prostaglandin E-2-like activity of the small intestine of rat during total bodyirradiation, PROS LEUK E, 62(6), 2000, pp. 349-353
Citations number
18
Categorie Soggetti
Cell & Developmental Biology
Journal title
PROSTAGLANDINS LEUKOTRIENES AND ESSENTIAL FATTY ACIDS
Radiation-induced gastrointestinal toxicity is important for subjects recei
ving radiation to the pelvis. Eicosanoids and free radicals may be involved
in the mechanism. rHuGM-CSF is a subcutaneously administered drug which ma
y reduce some side effects of radiation. This experimental study was undert
aken to determine the effectiveness of rHuGM-CSF on PGE(2)-like activity of
the small intestine in rats. Thirty-two adult male Wistar-Albino rats ente
red the study to be randomized to one of the four groups: Group I. Control;
II. Drug administered; III. Irradiated; IV. irradiated and drug administer
ed. Radiation was by total body irradiation, 800 rads with Cobalt 60. On th
e 9th day the animals were killed and biopsies were taken from the terminal
ileum. PGE(2)-like activity was evaluated. Animals were weighed on the day
of irradiation and end of the experiment. A statistically significant diff
erence was found according to pre- and post-treatment weights in the irradi
ated and nonirradiated drug administered groups (Groups II and IV) (P=0.035
and 0.018, respectively). PGE(2)-like activity in the intestinal tissue wa
s statistically significant higher in the drug-treated animals, both in non
-irradiated and irradiated groups. Surprisingly, irradiation was found to d
ecrease the PGE2-like activity in the intestinal tissue (P=0.008). rHuGM-CS
F was found to increase PGE(2)-like activity in the intestinal tissue. The
cellular mechanisms underlying this must be clearly determined and weighed
carefully in considering the drug for clinical usage. (C) 2000 Harcourt Pub
lishers Ltd.