Protective effects of GH and IGF-I against iron-induced lipid peroxidation in vivo

• Published in: Experimental and toxicologic pathology : official journal of the Gesellschaft für Toxikologische Pathologie 2008-09, Vol.60 (6), p.453-458
• Main Authors: Kokoszko, Agnieszka, Dąbrowski, Jan, Lewiński, Andrzej, Karbownik-Lewińska, Małgorzata
• Format: Article
• Language: English
• Subjects: Animals; Biological and medical sciences; Disease Models, Animal; Drug Therapy, Combination; Ferrous Compounds - toxicity; Growth hormone (GH); Growth Hormone - pharmacology; Insulin-Like Growth Factor I - pharmacology; Insulin-like growth factor-I (IGF-I); Intestine, Small - drug effects; Intestine, Small - metabolism; Investigative techniques, diagnostic techniques (general aspects); Iron; Iron Overload - metabolism; Iron Overload - prevention & control; Lipid peroxidation (LPO); Lipid Peroxidation - drug effects; Male; Malondialdehyde - metabolism; Medical sciences; Oxidative damage; Oxidative Stress - drug effects; Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques; Rats; Rats, Wistar; Recombinant Proteins
• ISSN: 0940-2993; 1618-1433
• DOI: 10.1016/j.etp.2008.04.012

Iron overload may enhance oxidative damage. Growth hormone (GH) and insulin-like growth factor-I (IGF-I) are involved in oxidative processes, lipid peroxidation (LPO) included. The aim of the study was to evaluate the in vivo effects of GH, IGF-I and/or iron on LPO in rat tissues. Male Wistar rats were administered iron (Fe 2+; 3 mg/100 g b.w., i.p., on the 8th day) and/or GH (0.2 IU/100 g b.w.), and/or IGF-I (2 μg/100 g b.w.) once daily for 8 days. LPO products (malondialdehyde+4-hydroxyalkenals) were measured in rat brain, lung, small intestine, liver, kidney, testis, spleen and serum. Iron injection increased LPO only in the small intestine and that effect was completely prevented by either GH or IGF-I. In the brain, GH decreased, whereas IGF-I increased, the basal LPO. GH and IGF-I possess some ability to prevent iron-induced oxidative damage in iron sensitive tissues, but contribute to oxidative imbalance in other tissues.