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GM-CSF is a monomeric glycoprotein that functions as a cytokine—it is a white blood cell growth factor. [6] GM-CSF stimulates stem cells to produce granulocytes (neutrophils, eosinophils, and basophils) and monocytes. Monocytes exit the circulation and migrate into tissue, whereupon they mature into macrophages and dendritic cells.
M-CSF (or CSF-1) is a hematopoietic growth factor that is involved in the proliferation, differentiation, and survival of monocytes, macrophages, and bone marrow progenitor cells. [7] M-CSF affects macrophages and monocytes in several ways, including stimulating increased phagocytic and chemotactic activity, and increased tumour cell ...
The name "colony-stimulating factors" comes from the method by which they were discovered. Hematopoietic stem cells were cultured (see cell culture) on a so-called semisolid matrix, which prevents cells from moving around, so that, if a single cell starts proliferating, all of the cells derived from it will remain clustered around the spot in the matrix where the first cell was originally located.
Monocytes circulate in the blood and are capable of differentiating into macrophages or dendritic cells, and macrophages are terminally differentiated tissue-resident cells. CSF1R signaling is necessary for differentiation of microglia and Langerhans cells which are derived from yolk sac progenitor cells with high expression of CSF1R. [7]
The intermediate monocyte expresses high levels of CD14 and low levels of CD16 (CD14 ++ CD16 + monocytes). While in humans the level of CD14 expression can be used to differentiate non-classical and intermediate monocytes, the slan (6-Sulfo LacNAc) cell surface marker was shown to give an unequivocal separation of the two cell types.
Granulocyte colony-stimulating factor (G-CSF or GCSF), also known as colony-stimulating factor 3 (CSF 3), is a glycoprotein that stimulates the bone marrow to produce granulocytes and stem cells and release them into the bloodstream. [5] [6]
The GM-CSF and IL-3 both work together to stimulate production of all lines. When erythropoietin (EPO) is present, red blood cell production from the CFU-GEMM will be activated. G-CSF, M-CSF, IL-5, IL-4, and IL-3 stimulate the production of neutrophils, monocytes, eosinophils, basophils, and platelets, respectively.
Monocytosis is an increase in the number of monocytes circulating in the blood. [1] Monocytes are white blood cells that give rise to macrophages and dendritic cells in the immune system. In humans, monocytosis occurs when there is a sustained rise in monocyte counts greater than 800/mm 3 to 1000/mm 3 .