title: [THE INFLUENCE OF MELANIN ON THE GASTRIC MUCOSA AND HYPOTHALAMIC-PITUITARY-ADRENOCORTICAL AXIS UNDER ACUTE STRESS CONDITIONS].
abstract: We studied the influence of melanin from yeast-like fungi Nadsoniella nigra strain X1 on the changes of the levels of adrenocorticotropic hormone (ACTH) and cortisol in blood serum of rats, adrenal glands weight ratio and lesions of the gastric mucosa (GM) caused by neuromuscular tension by Selye. Melanin administration restored functioning of the hypothalamic-pituitary-adrenal axis that was evident by an increase of ACTH concentration by 42% and a decrease of cortisol concentration by 19% compared to the rats injected with water (group 2). In rats treated with melanin, the adrenal glands weight ratio, didn't differ from intact control group of the rats. Melanin decreased ulcers area by 64% and reduced the content of free hydroxyproline by 29%, the free fucose by 16% and the free hexuronic acids by 24% in the GM compared to the group 2 of the rats. It is established that the mechanism of melanin stress-protective properties are based on its regulation of the glucocorticoids secretion and prevention of GM collagen and extracellular matrix substances depolymerization. Melanin possesses gastroprotective properties and is a perspective agent for preventing and treatment of consequences of the stress influence on the organism.
authors.forename: D V
authors.initials: DV
authors.lastname: Golyshkin
authors.forename: T M
authors.initials: TM
authors.lastname: Falalyeyeva
authors.forename: K S
authors.initials: KS
authors.lastname: Neporada
authors.forename: T V
authors.initials: TV
authors.lastname: Beregova
mesh_terms: D000311:Adrenal Glands / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D000324:Adrenocorticotropic Hormone / Q000097:blood; D000818:Animals; D003346:Corticotropin-Releasing Hormone / Q000097:blood; D005260:Female; D005643:Fucose / Q000378:metabolism; D005753:Gastric Mucosa / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D006603:Hexuronic Acids / Q000378:metabolism; D006854:Hydrocortisone / Q000097:blood; D006909:Hydroxyproline / Q000378:metabolism; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects* / Q000378:metabolism / Q000503:physiopathology; D008543:Melanins / Q000494:pharmacology*; D010913:Pituitary-Adrenal System / Q000187:drug effects* / Q000378:metabolism / Q000503:physiopathology; D020011:Protective Agents / Q000494:pharmacology*; D051381:Rats; D013312:Stress, Physiological / Q000187:drug effects; D013315:Stress, Psychological / Q000188:drug therapy
chemical_list: D006603:Hexuronic Acids; D008543:Melanins; D020011:Protective Agents; D005643:Fucose; D000324:Adrenocorticotropic Hormone; D003346:Corticotropin-Releasing Hormone; D006909:Hydroxyproline; D006854:Hydrocortisone