The agent of Human Granulocytic Ehrlichiosis resides in an endosomal compartment.

The agent of Human Granulocytic Ehrlichiosis resides in an endosomal compartment.
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人粒细胞埃利希体病的病原体存在于内涵体隔室中。

DOI:
10.1172/jci1544
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发表时间:
1998
期刊:
The Journal of clinical investigation
影响因子:
--
通讯作者:
Fikrig,E
Fikrig,E
中科院分区:
--
文献类型:
--
作者:
Webster,P;IJdo,JW;Chicoine,LM;Fikrig,E

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研究了含有人粒细胞性埃利希体病(HGE)病原体的细胞质空泡的组成,以探讨这种病原体如何在被感染的宿主细胞中存在。电镜显示,HGE生物存在于HL-60细胞内的膜结合腔室中:早期形式的HGE剂具有圆形网状外观,而后期结构较小且致密。含有HGE细菌的液泡结合了内吞胶体金颗粒,表明它们是内吞途径的一部分。抗体指向甘露糖-6-磷酸受体标记的液泡膜。转铁蛋白受体抗体和溶酶体膜糖蛋白LAMP 1抗体则没有。此外,3-(2,4-二硝基苯胺)-3'-氨基- n -甲基二丙胺通常积聚在低pH的隔室中,而在这些液泡中不存在。这些结果表明含有HGE剂的液泡不能成熟为吞噬溶酶体。我们得出结论,HGE剂似乎进入并改变了部分内吞途径。
The composition of cytoplasmic vacuoles containing the agent of Human Granulocytic Ehrlichiosis (HGE) was studied to investigate how this pathogen exists within infected host cells. Electron microscopy demonstrated that the HGE organism resides in a membrane-bound compartment within HL-60 cells: early forms of the HGE agent have a round reticular appearance while later structures are small and dense. Vacuoles containing HGE bacteria incorporated endocytosed colloidal gold particles, suggesting that they are part of the endocytic pathway. Antibodies directed to the mannose-6-phosphate receptor labeled vacuole membranes. Antibodies to the transferrin receptor and to the lysosomal membrane glycoprotein LAMP 1 did not. Moreover, 3-(2,4-dinitroanilino)-3'-amino-N-methyldipropylamine, which normally accumulates in compartments with low pH, was not present inside these vacuoles. These results suggest that vacuoles containing the agent of HGE fail to mature into phagolysosomes. We conclude that the agent of HGE appears to enter and modify part of the endocytic pathway.
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