chemotaxis

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Related to Chemotactic factors: histamine, chemotaxin

chemotaxis

 [ke″mo-tak´sis]
list; movement (taxis) in response to the influence of chemical stimulation. adj., adj chemotac´tic.
leukocyte chemotaxis the response of leukocytes to products formed in immunologic reactions, wherein leukocytes are attracted to and accumulate at the site of the reaction; a part of the inflammatory response. See also inflammation.

che·mo·tax·is

, positive chemotaxisnegative chemotaxis (kē'mo-tak'sis),
1. Movement of cells or organisms in response to chemicals, whereby the cells are attracted (positive chemotaxis) or repelled (negative chemotaxis) by substances exhibiting chemical properties.
2. The migration of polymorphonuclear leukocytes and macrophages toward higher concentrations of certain fragments of complement.
[chemo- + G. taxis, orderly arrangement]

chemotaxis

(kē′mō-tăk′sĭs, kĕm′ō-)
n.
The characteristic movement or orientation of an organism or cell along a chemical concentration gradient either toward or away from the chemical stimulus.

che′mo·tac′tic (-tăk′tĭk) adj.
che′mo·tac′ti·cal·ly adv.

che·mo·tax·is

, positive chemotaxis , negative chemotaxis (kē'mō-tak'sis, pozi-tiv, negă-tiv)
Movement of cells or organisms in response to chemicals.
Synonym(s): chemotropism.

chemotaxis

The movement of a cell or other living organism in a particular direction as a result of attraction by an increasing concentration of a chemical substance. Cells of the immune system find their prey by this means.

chemotaxis

the orientation of a motile cell or an organism in relation to the presence of a particular chemical, the response to a chemorepellent being negative (moving away) and to a chemoattractant being positive (moving towards). For example, the movement of a wasp towards an attractive odour such as beer would be positive chemotaxis. Cells are able to detect changes in the concentration of the chemical and alter their mobility accordingly For example, bacteria will change their pattern of swimming and tumbling.

che·mo·tax·is

, positive chemotaxis , negative chemotaxis (kē'mō-tak'sis, pozi-tiv, negă-tiv)
Movement of cells in response to chemicals, whereby the cells are attracted or repelled by substances exhibiting chemical properties.
References in periodicals archive ?
Indirectly, however, they are subject to its immunomodulatory effect, responding to chemotactic factors and neoplastic antigens present in peripheral blood, as well as to circulating neoplastic cells.
"Stromal cell-derived factor 1 is secreted by meningeal cells and acts as chemotactic factor on neuronal stem cells of the cerebellar external granular layer." Neuroscience, 2002; 115(1):295-305.
The production of chemotactic factors and specific adhesion molecules in the mammary gland allows the cells of mucosal origin to enter the mammary gland from the circulation and increase the production of immunologically active proteins in situ.
It also inhibits the release of chemotactic factors reducing the migration of neutrophils into the joint.
(Tokyo, Japan) has patented leukocyte chemotactic factors such as interleukin-8 and MCAF, and inductive substances therefor having proconceptive activities.
The disintegrating tunic cells may release chemotactic factors that induce blood cell infiltration.
Instead of using lab animals, Elgebaly keeps the isolated cows' corneas alive in little baths of nutrient solution called "corneal cups." After damaging the corneas, Elgebaly looks for changes in the cells of the corea, and for "chemotactic factors" in the fluid over the cornea.
Sekiya et al., "Comprehensive analysis of chemotactic factors for bone marrow mesenchymal stem cells," Stem Cells and Development, vol.
As wound healing is a complex phenomenon starting from inflammation to collagen formation, neovascularisation and finally the formation of scar tissue, adequate nutrition is required at different stages of wound healing like cell proliferation, cell repair, chemotactic factors (Cytokines, growth factors), cell division, cell movement at wound site etc.
The role of MPO in the regulation of the course of pulmonary inflammation, independent of its putative microbicidal functions, can be potentially linked to its ability to modulate the life span of neutrophils and affect accumulation of chemotactic factors at the site of inflammation.
Thus, it was named the "inflammation amplifier", because hyperactivation of NF-[kappa]B by activated STAT3 induces large amounts of NF-[kappa]B-targeted chemokines and chemotactic factors to promote the recruitment of immune cells (Figure 3).
In order to characterize potential chemotactic factors involved in the recruitment of the microglial cell population, some studies have taken advantage of the establishment of databases such as Expressed Sequence Tag (EST) library from the leech CNS and the leech genome [46].