Biomaterial Database

Anticryptococcal activity of macrophages: role of mouse strain, C5, contact, phagocytosis, and L-arginine. 1994

E Brummer, and D A Stevens

Department of Medicine, Santa Clara Valley Medical Center, California.

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.

UI	MeSH Term	Description	Entries
D008262	Macrophage Activation	The process of altering the morphology and functional activity of macrophages so that they become avidly phagocytic. It is initiated by lymphokines, such as the macrophage activation factor (MAF) and the macrophage migration-inhibitory factor (MMIF), immune complexes, C3b, and various peptides, polysaccharides, and immunologic adjuvants.	Activation, Macrophage,Activations, Macrophage,Macrophage Activations
D008297	Male		Males
D008815	Mice, Inbred Strains	Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations, or by parent x offspring matings carried out with certain restrictions. All animals within an inbred strain trace back to a common ancestor in the twentieth generation.	Inbred Mouse Strains,Inbred Strain of Mice,Inbred Strain of Mouse,Inbred Strains of Mice,Mouse, Inbred Strain,Inbred Mouse Strain,Mouse Inbred Strain,Mouse Inbred Strains,Mouse Strain, Inbred,Mouse Strains, Inbred,Strain, Inbred Mouse,Strains, Inbred Mouse
D010587	Phagocytosis	The engulfing and degradation of microorganisms; other cells that are dead, dying, or pathogenic; and foreign particles by phagocytic cells (PHAGOCYTES).	Phagocytoses
D002478	Cells, Cultured	Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.	Cultured Cells,Cell, Cultured,Cultured Cell
D003182	Complement C5	C5 plays a central role in both the classical and the alternative pathway of COMPLEMENT ACTIVATION. C5 is cleaved by C5 CONVERTASE into COMPLEMENT C5A and COMPLEMENT C5B. The smaller fragment C5a is an ANAPHYLATOXIN and mediator of inflammatory process. The major fragment C5b binds to the membrane initiating the spontaneous assembly of the late complement components, C5-C9, into the MEMBRANE ATTACK COMPLEX.	C5 Complement,Complement 5,Complement C5, Precursor,Complement Component 5,Precursor C5,Pro-C5,Pro-complement 5,C5, Complement,C5, Precursor,C5, Precursor Complement,Complement, C5,Component 5, Complement,Precursor Complement C5,Pro C5,Pro complement 5
D003455	Cryptococcus neoformans	A species of the fungus CRYPTOCOCCUS. Its teleomorph is Filobasidiella neoformans.	Blastomyces neoformans,Debaryomyces neoformans,Filobasidiella neoformans,Lipomyces neoformans,Saccharomyces neoformans,Torula neoformans,Torulopsis neoformans,Cryptococcus neoformans var. grubii
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D001120	Arginine	An essential amino acid that is physiologically active in the L-form.	Arginine Hydrochloride,Arginine, L-Isomer,DL-Arginine Acetate, Monohydrate,L-Arginine,Arginine, L Isomer,DL Arginine Acetate, Monohydrate,Hydrochloride, Arginine,L Arginine,L-Isomer Arginine,Monohydrate DL-Arginine Acetate
D017737	Macrophages, Peritoneal	Mononuclear phagocytes derived from bone marrow precursors but resident in the peritoneum.	Peritoneal Macrophages,Macrophage, Peritoneal,Peritoneal Macrophage