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Multinucleated giant cell formation of swine microglia induced by Mycobacterium bovis. 1996

P K Peterson, and G Gekker, and S Hu, and W B Anderson, and M Teichert, and C C Chao, and T W Molitor
Neuroimmunobiology and Host Defense Laboratory, Minneapolis Medical Research Foundation, Minnesota, USA.

Multinucleated giant cells (MGC) have been long recognized as a histopathologic feature of tuberculosis, yet little is known about the underlying mechanism of tubercle bacillus-induced formation of these fused macrophages. The main purpose of this study was to characterize cellular mechanisms involved in MGC formation of swine microglia, the resident macrophages of the brain, in cultures containing nonopsonized Mycobacterium bovis. Within 2 h of incubation, MGC were readily detected in these cultures by light and transmission electron microscopy. MGC formation was blocked by anti-CD14 and anti-CD18 antibodies and by thalidomide, a potent inhibitor of tumor necrosis factor-alpha (TNF-alpha) production my microglia. Also, TNF-alpha alone induced MGC formation. These findings suggest that two microglial cell receptors, CD14 and a beta2 integrin, and the cytokine TNF-alpha participate in M. bovis-induced swine microglial MGC formation.

UI MeSH Term Description Entries
D009163 Mycobacterium bovis The bovine variety of the tubercle bacillus. It is called also Mycobacterium tuberculosis var. bovis. BCG,Calmette-Guerin Bacillus
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
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
D013552 Swine Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA). Phacochoerus,Pigs,Suidae,Warthogs,Wart Hogs,Hog, Wart,Hogs, Wart,Wart Hog
D013792 Thalidomide A piperidinyl isoindole originally introduced as a non-barbiturate hypnotic, but withdrawn from the market due to teratogenic effects. It has been reintroduced and used for a number of immunological and inflammatory disorders. Thalidomide displays immunosuppressive and anti-angiogenic activity. It inhibits release of TUMOR NECROSIS FACTOR-ALPHA from monocytes, and modulates other cytokine action. Sedoval,Thalomid
D014409 Tumor Necrosis Factor-alpha Serum glycoprotein produced by activated MACROPHAGES and other mammalian MONONUCLEAR LEUKOCYTES. It has necrotizing activity against tumor cell lines and increases ability to reject tumor transplants. Also known as TNF-alpha, it is only 30% homologous to TNF-beta (LYMPHOTOXIN), but they share TNF RECEPTORS. Cachectin,TNF-alpha,Tumor Necrosis Factor Ligand Superfamily Member 2,Cachectin-Tumor Necrosis Factor,TNF Superfamily, Member 2,TNFalpha,Tumor Necrosis Factor,Cachectin Tumor Necrosis Factor,Tumor Necrosis Factor alpha
D014774 Virulence The degree of pathogenicity within a group or species of microorganisms or viruses as indicated by case fatality rates and/or the ability of the organism to invade the tissues of the host. The pathogenic capacity of an organism is determined by its VIRULENCE FACTORS. Pathogenicity
D015726 Giant Cells Multinucleated masses produced by the fusion of many cells; often associated with viral infections. In AIDS, they are induced when the envelope glycoprotein of the HIV virus binds to the CD4 antigen of uninfected neighboring T4 cells. The resulting syncytium leads to cell death and thus may account for the cytopathic effect of the virus. Giant Cells, Multinucleated,Multinucleated Giant Cells,Polykaryocytes,Syncytium,Syncytia,Cell, Giant,Cell, Multinucleated Giant,Cells, Giant,Cells, Multinucleated Giant,Giant Cell,Giant Cell, Multinucleated,Multinucleated Giant Cell,Polykaryocyte
D017628 Microglia The third type of glial cell, along with astrocytes and oligodendrocytes (which together form the macroglia). Microglia vary in appearance depending on developmental stage, functional state, and anatomical location; subtype terms include ramified, perivascular, ameboid, resting, and activated. Microglia clearly are capable of phagocytosis and play an important role in a wide spectrum of neuropathologies. They have also been suggested to act in several other roles including in secretion (e.g., of cytokines and neural growth factors), in immunological processing (e.g., antigen presentation), and in central nervous system development and remodeling. Microglial Cell,Cell, Microglial,Microglial Cells,Microglias
D018821 CD18 Antigens Cell-surface glycoprotein beta-chains that are non-covalently linked to specific alpha-chains of the CD11 family of leukocyte-adhesion molecules (RECEPTORS, LEUKOCYTE-ADHESION). A defect in the gene encoding CD18 causes LEUKOCYTE-ADHESION DEFICIENCY SYNDROME. Antigens, CD18,Integrin beta2,CD18 Antigen,beta2 Integrin,p150,95 beta-Subunit,Integrin, beta2,beta-Subunit, p150,95,beta2, Integrin,p150,95 beta Subunit

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