Effect of partial sleep deprivation on lipid profile in high fat diet-fed rats in the presence and absence of vitamin C

The daily stress and shift working cause insomnia. In other hands, fatty food consumption increased this disorder. The aim of present study is evaluation additive effect of partial insomnia and high fatty diet with or without vitamin C on serum lipid profile in rats. Fifty six rats in 7 groups [8 rats each group] were conducted for study during 26 days as: 1: normal diet+normal sleep, 2: high fatty diet+normal sleep, 3: normal diet+insomnia, 4: high fatty diet+insomnia, 5: high fatty diet+normal sleep+vitamin C, 6: high fatty diet+insomnia+vitamin C, 7: normal diet+insomnia+ vitamin C. The lipid profile was examined at end of study. Results shown the high fatty diet+insomnia increased triglyceride, LDL, VLDL level and decreased HDL level with comparison to high fatty diet+normal sleep group. But only insomnia did not change serum lipid profile. High fatty diet increased level of cholesterol [p<0.05]. The normal diet increased body weight but high fatty diet decreased it significantly. Liver weight ratio was elevated by high fatty diet+insomnia. The vitamin C decreased cholesterol and increased HDL level in group of rats which received high fatty diet+insomnia. In conclusion, the present study shown the only insomnia did not affect on serum lipid profile while insomnia along with high fatty diet increased lipid high risk factors in blood

[Preventive effect of grapefruit juice [Citrus Paradisi Macf.] on morphine withdrawal symptom in male rats]

Addiction to opiates such as morphine is one of major public health problems. It has been shown that in addicted animals, administration of antioxidant agents such as vitamin C can reduce the withdrawal symptoms [WDS]. The aim of this study was to evaluate the preventional effect of grapefruit juice [Citrus Paradisi Macf.] on withdrawal symptoms in rats. In this experimental study, Sixteen male Wistar rats [250-300g] randomly divided into two groups [n=8]. All animals were addicted by intraperitoneal [i.p] injection of morphine [the 1-3 days: 10 mg/kg, the 4-6 days: 20 mg/kg and the 7-9 days 40 mg/kg; daily] for 9 days. The first group received 2 ml Citrus Paradisi Macf. orally 1 hour before morphine administration. The sham group received 2 ml of normal saline. Naloxone [10mg/kg, s.c] was administrated 45 minutes after of an additional dose of morphine [40 mg/kg] in the tenth day for withdrawal symptoms inducing. Then withdrawal symptoms such as frequency of wet-dog shaking, teeth chattering, defecation and penis licking were evaluated for 30 minutes. All withdrawal symptoms including frequency of wet-dog shaking, teeth chattering, defecation and penis licking were reduced in the Citrus Paradisi Macf. group in comparison with the sham group significantly [p < 0.05]. Our results showed that presumably antioxidant activity of Citrus Paradisi Macf. can reduce withdrawal symptoms. Although the exact mechanisms of its effect in brain need to be elucidate