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首页> 外文期刊>Ukrainian Biochemical Journal >Monooxygenase system in Guerin’s carcinoma of rats under conditions of ω-3 polyunsaturated fatty acids administration
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Monooxygenase system in Guerin’s carcinoma of rats under conditions of ω-3 polyunsaturated fatty acids administration

机译:ω-3多不饱和脂肪酸给药条件下大鼠Guerin癌中的单加氧酶系统

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The aim of the study was to determine the variations of function in components of monooxygenase system (MOS) of rat Guerin’s carcinoma under ω-3 polyunsaturated fatty acids (PUFAs) administration. The activity of Guerin’s carcinoma microsomal NADH-cytochrome bsub5/sub reductase, the content and the rate of cytochrome bsub5/sub oxidation-reduction, the content and the rate of cytochrome Р450 oxidation-reduction have been investigated in rats with tumor under conditions of ω-3 PUFAs administration. ω-3 PUFAs supplementation before and after transplantation of Guerin’s carcinoma resulted in the increase of NADH-cytochrome bsub5/sub reductase activity and decrease of cytochrome bsub5/sub level in the Guerin’s carcinoma microsomal fraction in the logarithmic phases of carcinogenesis as compared to the tumor-bearing rats. Increased activity of NADH-cytochrome bsub5/sub reductase facilitates higher electron flow in redox-chain of MOS. Under decreased cytochrome bsub5/sub levels the electrons are transferred to oxygen, which leads to heightened generation of superoxide (Osub2/subsup?-/sup) in comparison to control. It was shown, that the decrease of cytochrome P450 level in the Guerin’s carcinoma microsomal fraction in the logarithmic phases of oncogenesis under ω-3 PUFAs administration may be associated with its transition into an inactive form – cytochrome P420. This decrease in cytochrome P450 coincides with increased generation of superoxide by MOS oxygenase chain.
机译:该研究的目的是确定在ω-3多不饱和脂肪酸(PUFAs)给药下大鼠Guerin癌的单加氧酶系统(MOS)的功能变化。娇兰癌性微粒体NADH-细胞色素b 5 还原酶的活性,细胞色素b 5 氧化还原的含量和速率,细胞色素Р450氧化的含量和速率在给予ω-3PUFAs的条件下,对患有肿瘤的大鼠进行了研究,发现其降低剂量。桂林癌移植前后补充ω-3PUFAs导致桂林癌微粒体中NADH-细胞色素b 5 还原酶活性增加,细胞色素b 5 水平降低与荷瘤大鼠相比,在致癌对数期的分数降低。 NADH-细胞色素b 5 还原酶活性的增加促进了MOS氧化还原链中电子的流动。在降低的细胞色素b 5 水平下,电子转移到氧气,与过氧化氢相比,导致产生的超氧化物(O 2 ?-)升高。控制。结果表明,在ω-3PUFAs的作用下,在致癌对数生长期的Guerin癌微粒体中,细胞色素P450水平的降低可能与其转变为非活性形式-细胞色素P420有关。细胞色素P450的这种减少与MOS加氧酶链增加的超氧化物生成相吻合。

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