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amplification systemPhysiology A generic term for any group of proteins that function in coordinated sequences, forming positive feedback loops for expanding the response to a low intensity signal
- eg factor Xa activating factor 'X' in the presence of factor VIII, Ca2+, and phospholipid
- Augments B-cell response. See Alternative and Classic pathways .
- Amplifies T-cell response, ILs, kinins, lipid mediators and mast cell products
cytokinesA general term for a range of proteins of low molecular weight that exert a stimulating or inhibiting influence on the proliferation, differentiation and function of cells of the immune system. Cytokines include INTERLEUKINS and INTERFERONS.
Chemicals made by the cells that act on other cells to stimulate or inhibit their function. Cytokines that stimulate growth are called "growth factors."