首页> 外文期刊>Life sciences >DIET-INDUCED CHANGES IN SERUM CHOLESTEROL CONCENTRATIONS DO NOT ALTER TRYPTOPHAN HYDROXYLATION RATE OR SEROTONIN CONCENTRATIONS IN GERBIL BRAIN
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DIET-INDUCED CHANGES IN SERUM CHOLESTEROL CONCENTRATIONS DO NOT ALTER TRYPTOPHAN HYDROXYLATION RATE OR SEROTONIN CONCENTRATIONS IN GERBIL BRAIN

机译:饮食中血清胆固醇浓度的变化不会改变沙丁胺中三苯氧磷的羟化率或血清素的浓度

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The relationship between serum cholesterol concentrations and serotonin synthesis rate in brain was examined in Mongolian gerbils chronically fed diets containing 20% fat (safflower oil, beef tallow or butterfat) with or without added cholesterol (0.5%, dry weight). After 22 daps on these diets, circulating cholesterol concentrations ranged between similar to 1.5 and similar to 20 mu mol/ml. Despite this enormous range, in vivo tryptophan hydroxylation rate, and serotonin and 5-hydroxyindoleacetic acid concentrations in cerebral cortex, hypothalamus and brainstem did not differ significantly among the diet groups. Tryptophan concentrations in serum and brain were also unaffected. These results do not support the hypothesis that the link between depression, suicide and violent deaths and below-normal or reduced serum cholesterol concentrations in humans involves an alteration in serotonin synthesis and/or release by brain neurons. [References: 52]
机译:在蒙古沙鼠长期饲喂含20%脂肪(红花油,牛脂或牛脂)加或不加胆固醇(0.5%,干重)的日粮中,检查了血清胆固醇浓度与大脑中血清素合成速率之间的关系。在这些饮食中小睡22次之后,循环中的胆固醇浓度介于1.5和20μmol/ ml之间。尽管存在很大的差异,但饮食组之间的体内色氨酸羟化率以及大脑皮层,下丘脑和脑干中5-羟色胺和5-羟吲哚乙酸的浓度没有显着差异。血清和脑中的色氨酸浓度也不受影响。这些结果不支持这样的假说,即抑郁,自杀和暴力死亡与人类血清胆固醇浓度低于正常水平或降低之间的联系涉及5-羟色胺合成和/或脑神经元释放的变化。 [参考:52]

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