Abstract:
:Disseminated infections by the opportunistic yeast Cryptococcus neoformans are characterized by accumulation in tissues of glucuronoxylomannan (GXM), the major component of the capsular polysaccharide. We investigated binding, uptake, and disposal of GXM by peripheral blood neutrophils and monocytes, and the effect of GXM uptake on phagocytic cell function. GXM was efficiently bound and internalized by both types of phagocytic cells, with maximal loading at 50 microg/ml, a GXM concentration found in serum and cerebrospinal fluid of some cryptococcosis patients. However, substantial differences were noted in the kinetics for uptake by macrophages and neutrophils. Whereas neutrophils rapidly ingested limited amounts of GXM and then expelled or degraded it after 1 h of incubation, macrophages demonstrated continuous intracellular accumulation for up to 1 week of incubation. Accumulation of GXM by neutrophils was accompanied by reduced anticryptococcal activity, suggesting one more mechanism for virulence enhancement by the major capsular component of C. neoformans.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Monari C,Retini C,Casadevall A,Netski D,Bistoni F,Kozel TR,Vecchiarelli Adoi
10.1002/eji.200323388keywords:
subject
Has Abstractpub_date
2003-04-01 00:00:00pages
1041-51issue
4eissn
0014-2980issn
1521-4141journal_volume
33pub_type
杂志文章abstract::A human IgE-producing myeloma has been cultivated in vitro as a continuous cell line (U-266) since 1968. Analysis of immunoglobulin production during early passages of the cell line demonstrated a high synthesis rate of monoclonal IgE. Analysis of late passages, cultivated after 1980, revealed a 3-6-fold lower rate of...
journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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更新日期:2007-07-01 00:00:00
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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doi:10.1002/eji.1830240830
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830251210
更新日期:1995-12-01 00:00:00
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journal_title:European journal of immunology
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doi:10.1002/eji.1830131209
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
pub_type: 杂志文章
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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