The suppression of macrophage secretion by calcium blockers and adenosine.

The suppression of macrophage secretion by calcium blockers and adenosine.
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钙阻滞剂和腺苷抑制巨噬细胞分泌。

DOI:
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发表时间:
1995
影响因子:
3.3
通讯作者:
D. Ou
D. Ou
中科院分区:
医学4区
文献类型:
--
作者:
H. Shen;M. Wiederhold;D. Ou

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为了研究钙阻滞剂和腺苷对小鼠腹膜巨噬细胞超氧化物、过氧化氢和亚硝酸盐分泌的影响,我们利用酚红法、超氧化物歧化酶抑制铁细胞色素c还原法和Griess试剂法检测了维拉帕米、硝苯地平和腺苷处理高周酸诱导的小鼠腹膜巨噬细胞后的产物。结果表明,在添加PMA (100 ng/ml)前10分钟用化学物质处理巨噬细胞,三种化学物质均能抑制超氧化物(O2-)和过氧化氢(H2O2)的分泌,但在处理24小时后,它们不能抑制巨噬细胞的活性氧中间体(ROI)。另一方面,钙阻滞剂维拉帕米和硝苯地平可以减少亚硝酸盐(NO2-)的分泌,而腺苷没有表现出抑制NO2-的能力。这表明钙作为一种次级信使,对ROI和RNI的产生很重要。在24小时的治疗中,巨噬细胞ROI产生抑制能力丧失的原因尚不清楚。
In an effort to examine the effects of calcium blockers and adenosine on superoxide, hydrogen peroxide, and nitrite secretions by mouse peritoneal macrophages, we have utilized the phenol red method, the superoxide dismutase-inhibitable reduction of ferricytochrome c method, and the Griess reagent method to test products after treating periodate-elicited mouse peritoneal macrophages with verapamil, nifedipine, and adenosine. The results show that after treating the macrophages with chemicals 10 minutes before adding PMA (100 ng/ml), all three chemicals inhibited superoxide (O2-) and hydrogen peroxide (H2O2) secretions dose-dependently, yet they failed to suppress macrophage reactive oxygen intermediates (ROI) after a 24 hour treatment. On the other hand, calcium blockers, verapamil and nifedipine, could reduce nitrite secretion (NO2-), while adenosine did not show the ability to inhibit NO2-. This indicates that calcium, as a secondary messenger, is important for the production of ROI and RNI. The reason behind the loss of the ability to suppress macrophage ROI production in a 24 hour treatment remains unexplored.
DOI: 10.1172/jci111249
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发表时间: 1983-01-01
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