2014年8月15日星期五

Selenium effects on gallium arsenide induced biochemical and immunotoxicological changes in rats

The influence of selenium (6.3 and 12.6 μmol/kg, intraperitoneally) on the disposition of gallium and arsenic and a few gallium arsenide (GaAs) sensitive biochemical variables was studied in male rats. Concomitant administration of Se and GaAs (70 μmol/kg, orally, 5 days a week for 4 weeks) significantly prevented the accumulation of arsenic while, the gallium concentration reduced moderately in the soft organs. The biochemical (haematopoietic and liver) and immunological variables however, responded less favorably to selenium administration. Most of the protection was however observed with the dose of 12.6 μmol rather than at 6.3 μmol. The results thus suggest a few beneficial effects of selenium in preventing the appearance of signs of GaAs toxicity like preventing inhibition of blood δ-aminolevulinic acid dehydratase (ALAD), hepatic malondialdehyde (MDA) formation and the accumulation of gallium and arsenic concentration.

Keywords:Gallium arsenide; Haematpoietic effects; Immunotoxicity; Protection; Selenium supplementation; Rat