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Anticryptococcal activity of macrophages: role of mouse strain, C5, contact, phagocytosis, and L-arginine.

Abstract：

:The antifungal activity of nonactivated resident murine peritoneal macrophages for Cryptococcus neoformans was studied. Macrophages from five of six mouse strains tested had significant (40 to 80%) fungistatic activity, depending on the inoculum size, in a 24-hr coculture system. Macrophages from two outbred (SW and ICR) and three inbred (BALB/c, C57Bl/6, and DBA/2J) strains were fungistatic. Only macrophages from outbred CD-1 mice lacked fungistatic activity. Heat-inactivated and C5-deficient sera did not support phagocytosis or fungistasis by resident BALB/c or DBA/2 macrophages. Fungistasis correlated with contact, complement, and phagocytosis. Macrophages were studied in a Lab-Tek chamber slide system where noningested cells were washed away. Fungistasis in this system was similar to that found with a microtest plate coculture method where a smaller inoculum was cultured continuously with macrophages. After ingestion of yeast cells, CD-1 macrophages could be activated for fungistasis (70%) with interferon-gamma plus lipopolysaccharide. Activated BALB/c macrophages had increased fungistasis but were not fungicidal. NG-Monomethyl-L-arginine (200 microM), which inhibited the fungistatic activity of activated CD-1 macrophages, did not inhibit inherent fungistatic activity of BALB/c macrophages. The fungistatic mechanism of BALB/c macrophages resembled that reported for resident human macrophages.

journal_name

Cell Immunol

journal_title

Cellular immunology

authors

Brummer E,Stevens DA

doi

10.1006/cimm.1994.1200

subject

Has Abstract

pub_date

1994-08-01 00:00:00

pages

1-10

issue

1

eissn

0008-8749

issn

1090-2163

pii

S0008-8749(84)71200-7

journal_volume

157

pub_type

杂志文章

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