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- W2077094593 abstract "A peptide fraction isolated from the venom of the Egyptian scorpion Buthus occitanus was proved to have a bradykinin- potentiating activity. In vivo and in vitro modes of action of the isolated bradykinin-potentiating peptide (BPP) on kidneys of guinea pigs were investigated. Animals received five successive i.p. doses of the scorpion BPP (1 microg/g body weight) at one-week intervals. The control animals were i.p. injected with saline solution only. In vivo experiments showed a significant increase in renal tissue PGE(2) content and lipid peroxides of the treated guinea pigs compared to the control animals (p < 0.05). Nonsignificant changes were detected in the levels of tissue c-AMP and 5-nucleotidase activity (p > 0.05) of the treated animals, while the changes in c-GMP and c-AMP/c-GMP ratio were both significant (p < 0.05). In vitro experiments demonstrated enhanced capacity of guinea pig-renal tissue to convert (14)C-linoleic acid to its metabolites, 6-keto-PGF(1)alpha, PGF(2)alpha, PGE(2), TxB(2), PGD(2), and arachidonic acid, in response to the added PBP (1 microg/ml) and bradykinin (1 microg/ml). This enhanced response was abolished upon the addition of 1 microg/ml of BK-inhibitor (D-Arg- [Hyp(3), Thi(5,6), Phe(7)]). The capacity for labeled metabolites recovery in BPP treated renal tissue was 19.78%, while it was 13.00% in the basal control. The total increase that evoked by BPP was 62.78%. The results clearly indicate that the isolated BPP induced prostaglandin biosynthesis, which may trigger enhanced glomerular filtration in guinea pigs." @default.
- W2077094593 created "2016-06-24" @default.
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- W2077094593 date "2004-01-01" @default.
- W2077094593 modified "2023-09-27" @default.
- W2077094593 title "A Scorpion Venom Peptide Fraction Induced Prostaglandin Biosynthesis in Guinea Pig Kidneys: Incorporation of 14C-Linoleic Acid" @default.
- W2077094593 doi "https://doi.org/10.1093/jb/mvh013" @default.
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