Résumé
Objective: To study the effects of rapid eye movement sleep (REMS) deprivation on active behavior and the expression of mRNA coding for inducible nitric oxide synthase (iNOS) of hypothalamus in rats. Methods: The flower pot technique was adopted to deprive the REMS of Sprague Dawley rats for 24 h, 48 h and 72 h respectively. The active behavior of rats were examined by the open field test (OFT). The expression of mRNA coding for iNOS of hypothalamus in rats was assayed by reverse transcription polymerase chain reaction (RT PCR). Results: The OFT scores were significantly increased in rats subjected to 24 h and 48 h REMS deprivation ( P 0.05). There was no difference in the expression of iNOS mRNA among 24 h, 48 h REMS deprivation and the control groups, but the expression was significantly increased in 72 h REMS deprivation group ( P
Résumé
Weanling Wistar rats were fed a modified AIN-76 diet ad libitum for 25 to 57 days, either copper-deficient (0.49mg/kg; CuD) or copper-adequate (6.44mg/kg;CuA). The effects of dietary copper deficiency on the enzymatic components of the primary free radical defense system-super-oxide dismutase (SOD), catalasc (CAT) and glutathione peroxidase (GSH-Px), lipoperoxides (LPO) and serum hemolysin were examined. The amount of LPO exhibited no significant change even though SOD activity decreased significantly in the tissues of CuD rats, which indicated that Cu-ZnSOD activity responded directly to copper status of the body but the compromises in the overall protection against free radicals were not evident. The profound reduction in scrum hemolysin in CuD rats suggests that humoral immune function is copper dependent. The results also suggest that as an index of evaluating copper nutriture CuZnSOD is more sensitive than hemoglobin to copper deficiency.