Search results
Results from the WOW.Com Content Network
Cytokines produced during innate immune responses are among the activators of adaptive immune responses. [33] Antibodies exert additive or synergistic effects with mechanisms of innate immunity. Unstable HbS clusters Band-3, a major integral red cell protein; [ 34 ] antibodies recognize these clusters and accelerate their removal by phagocytic ...
Two papers appearing in 1994 anticipated the deeper understanding of innate immune reactivity, pointing towards the subsequent understanding of the nature of the adaptive immune response. The first [8] came from transplant surgeons who conducted a prospective randomized, double-blind, placebo-controlled trial.
Current hypotheses include two whole-genome duplication events in vertebrates, [17] which would provide the genetic raw material for the development of the adaptive immune system, and the development of endothelial tissue, greater metabolic activity, and a decreased blood volume-to-body weight ratio, all of which are more specialized in ...
The immune system may respond in multiple ways to an antigen; a key feature of this response is the production of antibodies by B cells (or B lymphocytes) involving an arm of the immune system known as humoral immunity. The antibodies are soluble and do not require direct cell-to-cell contact between the pathogen and the B-cell to function.
An immune response is a physiological reaction which occurs within an organism in the context of inflammation for the purpose of defending against exogenous factors. These include a wide variety of different toxins, viruses, intra- and extracellular bacteria, protozoa, helminths, and fungi which could cause serious problems to the health of the host organism if not cleared from the body.
The adaptive immune system and antigen-specific receptor generation (TCR, antibodies) are responsible for adaptive immune memory. [citation needed] After the inflammatory immune response to danger-associated antigen, some of the antigen-specific T cells and B cells persist in the body and become long-living memory T and B cells. After the ...
In immunology, clonal selection theory explains the functions of cells of the immune system (lymphocytes) in response to specific antigens invading the body. The concept was introduced by Australian doctor Frank Macfarlane Burnet in 1957, in an attempt to explain the great diversity of antibodies formed during initiation of the immune response .
Toll-like receptors were first discovered in Drosophila and trigger the synthesis and secretion of cytokines and activation of other host defense programs that are necessary for both innate or adaptive immune responses. 10 functional members of the TLR family have been described in humans so far. [5]