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L-arginine and mitomycin C-induced nitric oxide release and apoptosis in human lymphocytes.

机译:L-精氨酸和丝裂霉素C诱导的一氧化氮在人淋巴细胞中的释放和凋亡。

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摘要

Nitric oxide (NO) is a free radical that is produced by a number of mammalian cell types from L-arginine and a critical mediator that acts in many tissues to regulate a diverse range of physiological processes. The major metabolic end product for NO is nitrate (NO(3)) and nitrite (NO(2)), which are stable metabolites within tissue, plasma, and urine. Measurements of nitrate and nitrite values reveal alterations in NO production. Endogenously generated or exogenously applied NO causes DNA cleavage by endonuclease activation.We investigated the effect of L-arginine and mitomycin C (MMC) on cultured lymphocytes of healthy individuals. We observed chromosome breaks, apoptotic cells and increased NO levels after L-arginine and MMC addition. In conclusion, our results confirmed that NO may be the cause of apoptotic cell death in L-arginine added lymphocyte culture.
机译:一氧化氮(NO)是一种自由基,由L-精氨酸和多种介质在许多组织中发挥作用,调节多种生理过程,而这些细胞是多种哺乳动物细胞产生的。 NO的主要代谢终产物是硝酸盐(NO(3))和亚硝酸盐(NO(2)),它们是组织,血浆和尿液中的稳定代谢产物。硝酸盐和亚硝酸盐值的测量揭示了NO产生的变化。内源性产生或外源性施加的NO通过核酸内切酶激活引起DNA切割。我们研究了L-精氨酸和丝裂霉素C(MMC)对健康个体培养的淋巴细胞的影响。我们观察到添加L-精氨酸和MMC后染色体断裂,凋亡细胞和NO水平升高。总之,我们的结果证实NO可能是添加L-精氨酸的淋巴细胞培养物中凋亡细胞死亡的原因。

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