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大鼠腹膜巨噬细胞中自由基产生随年龄增长而减少。

Decrease in free-radical production with age in rat peritoneal macrophages.

作者信息

Alvarez E, Conde M, Machado A, Sobrino F, Santa Maria C

机构信息

Departamento de Bioquimica, Bromatologia y Toxicologia, Facultad de Farmacia, Universidad de Sevilla, Spain.

出版信息

Biochem J. 1995 Dec 1;312 ( Pt 2)(Pt 2):555-60. doi: 10.1042/bj3120555.

Abstract

The respiratory-burst reaction has been studied in rat peritoneal macrophages of different ages (3, 12 and 24 months) using phorbol 12-myristate 13-acetate (PMA) to stimulate NADPH oxidase. Production of O2-. and H2O2 decreased with age (about 50 and 75% respectively); however, no difference in NADPH oxidase activity was found. NO. production was also reduced with age (40%). Furthermore, a progressive and significant decrease in the pentose phosphate flux was detected as a function of age in control and PMA-stimulated macrophages. The NADPH/NADP+ ratio decreased with age in control and PMA-stimulated macrophages. Glucose uptake was lower in middle-aged (12 months) and old (24 months) animals but no differences were found between these groups.

摘要

利用佛波醇12 -肉豆蔻酸酯13 -乙酸酯(PMA)刺激NADPH氧化酶,对不同年龄(3、12和24个月)大鼠腹膜巨噬细胞的呼吸爆发反应进行了研究。超氧阴离子(O2-)和过氧化氢(H2O2)的产生随年龄增长而减少(分别约为50%和75%);然而,未发现NADPH氧化酶活性存在差异。一氧化氮(NO)的产生也随年龄增长而降低(40%)。此外,在对照和PMA刺激的巨噬细胞中,检测到磷酸戊糖通量随年龄增长而逐渐显著下降。在对照和PMA刺激的巨噬细胞中,NADPH/NADP+比值随年龄增长而降低。中年(12个月)和老年(24个月)动物的葡萄糖摄取较低,但这两组之间未发现差异。

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