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首页> 外文期刊>ANZ journal of surgery >Nitric oxide biosynthesis and malondialdehyde levels in advanced breast cancer.
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Nitric oxide biosynthesis and malondialdehyde levels in advanced breast cancer.

机译:一氧化氮的生物合成和丙二醛水平在晚期乳腺癌中。

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摘要

BACKGROUND: Nitric oxide (NO) is a free oxygen radical studied in many tissues. Its tumour killing structure is shown especially by macrophages. The end products of NO are nitrite and nitrate. Their plasma levels are used biochemically to determine nitric oxide synthase (NOS) activity. The proliferative capacity of cancer cells accompanies the alteration in oxidant-anti-oxidant status. The risk of breast cancer is decreased in association with an increased level of polyunsaturated fatty acids in the erythrocyte membranes. The more the anti-oxidant capacity increases, the more the transformed cells grow. Malondialdehyde (MDA) is a lipid peroxidation marker, and low plasma levels of MDA are associated with advanced stages of breast cancer. METHODS: In the present study, the alteration of serum plasma levels of nitrate, nitrite and MDA were determined in patients with stage IIIB breast cancer and controls. RESULTS: It was found that products of NO biosynthesis were higher and plasma MDA levels were lower in patients with breast cancer. CONCLUSIONS: It can be stated that in advanced breast cancer, the NO radical production is increased while the lipid metabolism is altered, and these changes can be related to an alteration in oxidant-anti-oxidant status.
机译:背景:一氧化氮(NO)是在许多组织中研究的游离氧自由基。其肿瘤杀伤结构尤其通过巨噬细胞显示。 NO的最终产物是亚硝酸盐和硝酸盐。它们的血浆水平可用于生化测定一氧化氮合酶(NOS)活性。癌细胞的增殖能力伴随着抗氧化剂状态的改变。与红细胞膜中多不饱和脂肪酸含量增加相关的乳腺癌风险降低。抗氧化能力增加的越多,转化细胞的生长越多。丙二醛(MDA)是脂质过氧化的标志物,血浆MDA含量低与乳腺癌晚期有关。方法:在本研究中,确定了IIIB期乳腺癌患者和对照组的血浆血浆硝酸盐,亚硝酸盐和MDA水平的变化。结果:发现乳腺癌患者NO的生物合成产物较高,血浆MDA水平较低。结论:可以说,在晚期乳腺癌中,NO自由基的产生增加而脂质代谢改变,这些改变可能与抗氧化剂状态的改变有关。

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