...
首页> 外文期刊>Infection and immunity >Impairment of the oxidative metabolism of mouse peritoneal macrophages by intracellular Leishmania spp.
【24h】

Impairment of the oxidative metabolism of mouse peritoneal macrophages by intracellular Leishmania spp.

机译:细胞内利什曼原虫属物种对小鼠腹膜巨噬细胞氧化代谢的损害。

获取原文
           

摘要

When stimulated in vitro with macrophage-activating factor or lipopolysaccharide, mouse peritoneal macrophages acquire the capacity to develop a strong respiratory burst when they are triggered by membrane-active agents. The presence of intracellular parasites of the genus Leishmania (L. enriettii, L. major) significantly inhibited such activity, as measured by chemiluminescence, reduction of cytochrome c and Nitro Blue Tetrazolium, and hexose monophosphate shunt levels. On the contrary, inert intracellular particles such as latex beads strongly increased the macrophage respiratory burst, suggesting that the Leishmania-linked inhibition resulted from a specific parasite effect. Impairment of macrophage oxidative metabolism by intracellular Leishmania spp. was a function of the number of infecting microorganisms and was more pronounced in macrophages infected with living than with dead parasites. Moreover, the metabolic inhibition was less apparent in L. enriettii-infected macrophages that were exposed to both macrophage-activating factor and lipopolysaccharide, i.e., conditions leading to complete parasite destruction. The mechanisms of respiratory burst inhibition by intracellular Leishmania spp. are unclear, but these observations suggest that such effects may contribute significantly to intracellular survival of the microorganisms.
机译:当在体外用巨噬细胞活化因子或脂多糖刺激时,当小鼠腹膜巨噬细胞被膜活性剂触发时,它们具有形成强力呼吸爆发的能力。通过化学发光,细胞色素c和硝基蓝四唑的还原以及己糖一磷酸分流水平测量,利什曼原虫属(L. enriettii,L。major)的细胞内寄生虫的存在显着抑制了这种活性。相反,惰性细胞内颗粒(如乳胶珠)会极大地增加巨噬细胞的呼吸爆发,这表明与利什曼原虫相关的抑制作用是由特定的寄生虫效应引起的。细胞内利什曼原虫对巨噬细胞氧化代谢的损害。这是感染微生物数量的函数,在感染了活菌的巨噬细胞中比在死亡的寄生虫中更为明显。此外,在暴露于巨噬细胞活化因子和脂多糖的enriettii感染的巨噬细胞,即导致完全寄生虫破坏的条件下,代谢抑制作用不太明显。细胞内利什曼原虫属物种抑制呼吸爆发的机制。尚不清楚,但这些观察结果表明这种作用可能显着促进微生物的细胞内存活。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号