title: [The antioxidant activity of cyclohistidylproline].
abstract: A cyclohistidyl-proline, cyclopeptide possessing a hormonal and neurotrophic activity is shown to be an inhibitor of the (Fe + ascorbic acid)-induced peroxidation of membrane lipids, its effect being dependent on its concentration. Inhibition of the malondialdehyde formation by cyclohistidil-proline is accompanied by protection of the membrane bound Ca-pump. In the test of the free radical cumole oxidation antioxidative effect of cyclohistidyl-proline is 4 times higher than that of the hydrophilic antioxidant carnosine. After peritoneal injection of cyclohistidil-proline (15 mg/kg of body weight) to rats the stationary level of thiobarbituric acid reactive products in rat brain or serum is pronouncedly decreased, this effect being in progress up to 6 h after injection. Antioxidative action of cyclohistidyl-proline suggests to be on the basis of a variety of its biological effects.
authors.forename: Iu P
authors.initials: IuP
authors.lastname: Shvachkin
authors.forename: G A
authors.initials: GA
authors.lastname: Korshunova
authors.forename: N I
authors.initials: NI
authors.lastname: Bavykina
authors.forename: N V
authors.initials: NV
authors.lastname: Guliaeva
authors.forename: A M
authors.initials: AM
authors.lastname: Dupin
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D001555:Benzene Derivatives / Q000378:metabolism; D001923:Brain Chemistry / Q000187:drug effects; D002540:Cerebral Cortex / Q000187:drug effects / Q000378:metabolism; D005609:Free Radicals; D066298:In Vitro Techniques; D015227:Lipid Peroxidation / Q000187:drug effects; D008054:Lipid Peroxides / Q000032:analysis; D010456:Peptides, Cyclic / Q000494:pharmacology*; D010879:Piperazines / Q000494:pharmacology*; D011817:Rabbits; D051381:Rats; D012519:Sarcoplasmic Reticulum / Q000187:drug effects / Q000378:metabolism
chemical_list: D000975:Antioxidants; D001555:Benzene Derivatives; D005609:Free Radicals; D008054:Lipid Peroxides; D010456:Peptides, Cyclic; D010879:Piperazines; C015763:cumene; C015924:histidyl-proline diketopiperazine
vernacular_title: Antioksidantnaia aktivnost' tsiklogistidilprolina.