title: A synthetic analog of prostaglandin E(1) prevents the production of reactive oxygen species in the intestinal mucosa of methotrexate-treated rats.
abstract: Administration of methotrexate to rats results in severe enterocolitis and death. Previous our studies showed that a synthetic analog of prostaglandin E(1), OP-1206 [17S, 20-dimethyl-trans-Delta(2)-prostaglandin E(1)] ameliorated the anticancer agent-induced enterocolitis of rats. In the current study, we have focused on the biochemical effect of OP-1206 on the methotrexate-induced intestinal inflammation implicating reactive oxygen species (ROS). Methotrexate (15 mg/kg body weight) was orally administered to rats once daily for 5 days. OP-1206 (0.5 microg/kg body weight) was orally administered to rats twice a day for 5 days. On the 6th day, the chemiluminescence from the jejunum was measured to evaluate the generation of ROS. Spontaneous chemiluminescence from the jejunum of the methotrexate-treated rats increased significantly, compared with the control. Luminol-enhanced chemiluminescence from inflamed mucosal scrapings from the jejunum of the methotrexate-treated rats indicated more remarkable enhancement than the control rats. The treatment of OP-1206 with methotrexate showed significantly lower chemiluminescence of both the jejunum and mucosal scrapings than those of the methotrexate-treated rats. The alkaline phosphatase (ALP) activity, as a marker of small intestinal differentiation, in the intestinal mucosa of the methotrexate-treated rats decreased remarkably, but that of the methotrexate and OP-1206-treated rats was significantly higher than that of the methotrexate-treated rats. Thus, OP-1206 may possibly help the anticancer chemotherapy by protecting the small intestine from the methotrexate-induced damage.
authors.affiliation: Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, 263-8522, Chiba, Japan.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.forename: Toshiharu
authors.initials: T
authors.lastname: Horie
mesh_terms: D000527:Alprostadil / Q000031:analogs & derivatives* / Q000494:pharmacology; D000818:Animals; D007413:Intestinal Mucosa / Q000187:drug effects* / Q000378:metabolism; D007583:Jejunum / Q000187:drug effects* / Q000378:metabolism; D008163:Luminescent Measurements; D008297:Male; D008727:Methotrexate / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D017382:Reactive Oxygen Species
chemical_list: D017382:Reactive Oxygen Species; C025090:ONO 1206; D000527:Alprostadil; D008727:Methotrexate