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

/che·mo·tax·is/ (-tak´sis) taxis in response to the influence of chemical stimulation.chemotac´tic

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.

chemotaxis

[-tak′sis]
Etymology: Gk, chemeia + taxis, arrangement
movement toward or away from a chemical stimulus. Chemotaxis is a cellular function, particularly of neutrophils and monocytes, whose phagocytic activity is influenced by chemical factors released by invading microorganisms.

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.

chemotaxis

attraction of inflammatory cells (neutrophils, macrophages) to sites of actual or potential tissue trauma, mediated by the local release of trigger chemicals (exogenous substances [from infecting microorganisms] and endogenous acute inflammatory response compounds [complement factors, clotting factors, histamine, kinins, prostaglandins, leukotrienes, cytokines, and platelet-activating factor])

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.

chemotaxis (kē´mōtak´sis),

n a response involving movement that is positive (toward) or negative (away from) to a chemical stimulus.
chemotaxis, leukocyte,
n the phagocytic activity of neutrophils and monocytes in response to chemical factors released by invading microorganisms.

chemotaxis

taxis or directional movement in response to the influence of chemical stimulation.

leukocyte chemotaxis
the response of leukocytes to products formed in immunological reactions, wherein leukocytes are attracted to and accumulate at the site of the reaction; a part of the inflammatory response. See also inflammation.
References in periodicals archive ?
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.
Chemotactic factors presumably modulate the influx of eosinophils, one of which is histamine.
T lymphocytes induce the migration of monocytes to the site of disease by secreting chemotactic factors, the initial step in granuloma formation.
Tokyo, Japan) has patented leukocyte chemotactic factors such as interleukin-8 and MCAF, and inductive substances therefor having proconceptive activities.
During the study, we found that the humanized monoclonal antibody MORAb-004 was able to specifically bind to a region of endosialin/TEM1 and inhibit endosialin/TEM1-ECP interactions that in turn resulted in suppressed cell migration to chemotactic factors," said Luigi Grasso, Ph.
Upon infection, neutrophils are rapidly activated and recruited to infected sites by host- and pathogen-derived chemotactic factors.
As such, it is possible that the relative ability of the CRP concentrations and eosinopenia in diagnosing different types of sepsis is different, depending on the severity of systemic inflammation and amount of chemotactic factors released into the systemic circulation.