Two groups of antibodies against mouse resident alveolar and peritoneal
macrophages have been raised individually in rabbits by immunization
with whole cell suspensions of lavaged alveolar and peritoneal macrophages.
The whole antisera reacted positively with neutrophils and
lymphocytes. However, upon extensive absorptions with these cells the
activity became restricted to macrophages. The...
Background: C5areceptor antagonistPMX205 is a synthetic hexapeptidecapable of blocking C5a-C5a receptor (C5aR) axis by simulating C5a active C-terminal amino acid residues. This hexapeptide presents good anti-inflammatory effects in a myriad inflammation models. The anti-inflammatory effect of PMX205 on periodontitis is yet to be fully fathomed. Objective: To examine the anti-inflammatory effec...
:The Journal of Experimental Medicine2005
The fusion of cells is a fundamental biological event that is essential for a variety of developmental and homeostatic processes. Fusion is required for the formation of multinucleated osteoclasts and giant cells, although the mechanisms that govern these processes are poorly understood. A new study now reveals an unexpected role for the receptor, dendritic cell-specific transmembrane protein (...
ALAN B. EZEKOWITZ,
R. B. SIM,
Circulating monocytes and tissue macrophages (Me) 1 secrete complement proteins and have distinct receptors for some of these secreted products. Although hepatocytes and possibly epithelial cells are major sources of plasma complement (1), Mcl synthesize C1 subcomponents (2, 3), C4 (4, 5), C2 (5-7) C5 (8), C3 (2, 8) and all the components of the alternative pathway and its control proteins (8)....
Podosomes are protrusive structures implicated in macrophage extracellular matrix degradation and three-dimensional migration through cell barriers and the interstitium. Podosome formation and assembly are regulated by cytoskeleton remodeling requiring cytoplasmic tyrosine kinases of the Src and the Abl families. Considering that Abl has been reported to phosphorylate the guanine nucleotide exc...
María Sofía Martínez,
Cardiovascular disease (CVD) is a global epidemic, currently representing the worldwide leading cause of morbidity and mortality. Atherosclerosis is the fundamental pathophysiologic component of CVD, where the immune system plays an essential role. Monocytes and macrophages are key mediators in this aspect: due to their heterogeneity and plasticity, these cells may act as either pro- or anti-in...
Macrophages are pleiotropic cells capable of performing a broad spectrum of functions. Macrophage phenotypes are classified along a continuum between the extremes of proinflammatory M1 macrophages and anti-inflammatory M2 macrophages. The seemingly opposing functions of M1 and M2 macrophages must be tightly regulated for an effective and proper response to foreign molecules or damaged tissue. E...
Macrophages are terminally differentiated cells of the mononuclear phagocyte system that also encompasses dendritic cells, circulating blood monocytes, and committed myeloid progenitor cells in the bone marrow. Both macrophages and their monocytic precursors can change their functional state in response to microenvironmental cues exhibiting a marked heterogeneity. However, there are still uncer...