Binding and internalization of glucuronoxylomannan, the major capsular polysaccharide of Cryptococcus neoformans, by murine peritoneal macrophages | |
Chang, ZL; Netski, D; Thorkildson, P; Kozel, TR | |
刊名 | INFECTION AND IMMUNITY |
2006 | |
卷号 | 74期号:1页码:144-151 |
通讯作者 | Kozel, TR (reprint author), Univ Nevada, Sch Med, Dept Microbiol & Immunol 320, Reno, NV 89557 USA.,trkozel@med.unr.edu |
英文摘要 | Glucuronoxylomarman (GXM), the major component of the capsular polysaccharide of Cryptococcus neoformans, is essential to virulence of the yeast. Previous studies found that the interaction between GXM and phagocytic cells has biological consequences that may contribute to the pathogenesis of cryptococcosis. We found that GXM binds to and is taken up by murine peritoneal macrophages. Uptake is dose and time dependent. Examination of the sites of GXM accumulation by immunofluorescence microscopy showed that the pattern was discontinuous and punctate both on the surfaces of macrophages and at intracellular depots. Although resident macrophages showed appreciable accumulation of GXM, uptake was greatest with thioglycolate-elicited macrophages. A modest stimulation of GXM binding followed treatment of resident macrophages with phorbol 12-myristate 13-acetate, but treatment with lipopolysaccharide or gamma interferon alone or in combination had no effect. Accumulation of GXM was critically dependent on cytoskeleton function; a near complete blockade of accumulation followed treatment with inhibitors of actin. GXM accumulation by elicited macrophages was blocked by treatment with inhibitors of tyrosine kinase, protein kinase C, and phospholipase C, but not by inhibitors of phosphatidylinositol 3-kinase, suggesting a critical role for one or more signaling pathways in the macrophage response to GXM. Taken together, the results demonstrate that it is possible to experimentally enhance or suppress binding of GXM to macrophages, raising the possibility for regulation of the interaction between this essential virulence factor and binding sites on cells that are central to host resistance. |
学科主题 | Immunology; Infectious Diseases |
类目[WOS] | Immunology ; Infectious Diseases |
关键词[WOS] | RECEPTOR-MEDIATED PHAGOCYTOSIS ; HUMAN-MONOCYTES ; HUMAN NEUTROPHILS ; MONOCLONAL-ANTIBODIES ; FC-RECEPTOR ; COMPLEMENT ; TOXICITY ; ACTIVATION ; CLEARANCE ; SECRETION |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000234276400015 |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://202.127.25.143/handle/331003/1654] |
专题 | 上海生化细胞研究所_上海生科院生化细胞研究所 |
推荐引用方式 GB/T 7714 | Chang, ZL,Netski, D,Thorkildson, P,et al. Binding and internalization of glucuronoxylomannan, the major capsular polysaccharide of Cryptococcus neoformans, by murine peritoneal macrophages[J]. INFECTION AND IMMUNITY,2006,74(1):144-151. |
APA | Chang, ZL,Netski, D,Thorkildson, P,&Kozel, TR.(2006).Binding and internalization of glucuronoxylomannan, the major capsular polysaccharide of Cryptococcus neoformans, by murine peritoneal macrophages.INFECTION AND IMMUNITY,74(1),144-151. |
MLA | Chang, ZL,et al."Binding and internalization of glucuronoxylomannan, the major capsular polysaccharide of Cryptococcus neoformans, by murine peritoneal macrophages".INFECTION AND IMMUNITY 74.1(2006):144-151. |
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