opsonin


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Related to opsonin: opsonization, Cytokines

opsonin

 [op´sŏ-nin]
an antibody that renders bacteria and other cells susceptible to phagocytosis. adj., adj opson´ic.
immune opsonin an antibody that sensitizes a particulate antigen to phagocytosis.

op·so·nin

(op'sŏ-nin),
Any blood serum protein that binds to antigens, enhancing phagocytosis (for example, C3b of the complement system, specific antibodies).
[G. opson, boiled meat, provisions, fr. hepsō, to boil, + -in]

opsonin

/op·so·nin/ (op´son-in) an antibody that renders bacteria and other cells susceptible to phagocytosis.opson´ic
immune opsonin  an antibody that sensitizes a particulate antigen to phagocytosis, after combination with the homologous antigen in vivo or in vitro.

opsonin

(ŏp′sə-nĭn)
n.
An antibody or product of complement activation in blood serum that causes bacteria or other foreign cells to become more susceptible to the action of phagocytes.

opsonin

[op′sənin]
Etymology: Gk, opsonein, to supply food
an antibody or complement split product that, on attaching to foreign material, microorganisms, or other antigens, enhances phagocytosis of that substance by leukocytes and other macrophages. opsonize, v.

op·so·nin

(op'sŏ-nin)
A substance that binds to antigens, enhancing phagocytosis.
[G. opson, boiled meat, provisions, fr. hepsō, to boil, + -in]

opsonin

One of a number of substances, especially an antibody, naturally present in the blood that bind to the surface of bacteria to make them more readily susceptible to attack and destruction by PHAGOCYTES.

opsonin

a type of ANTIBODY which binds to ANTIGENS, increasing their susceptibility to phagocytosis by other antibodies.

opsonin

a substance such as antibody, complement or properdin that renders bacteria and other cells more susceptible to phagocytosis.

immune opsonin
an antibody that, when bound to particulate antigen, enhances in vivo or in vitro phagocytosis; the Fc portion of the antibody binds to an Fc receptor on the surface of the phagocytic cell.
References in periodicals archive ?
He knows that Ridgeon's dilemma is false, because Ridgeon has already explained to him at the beginning of act 1 that his discovery is no more than a simple test at the hospital that takes fifteen minutes to indicate the patient's opsonin level.
Cytokine-like activity of a humoral opsonin from the solitary urochordate Styela cleva.
Uterine defence mechanism in mare: Serum opsonins affecting phagocytosis of Strep.
This is due to the fast adsorption and conformational change of opsonins in the blood and bacterial proteins, as well as the interaction of the bacterial cell surface receptors to the exposed functional peptides (213).
The classical complement pathway and heat-stable opsonins are required for maximal opsonic activity against the major serotypes of CBS.
Acupuncture may raise levels of triglycerides (the chief component of fats and oils), prostaglandins (hormones that affect blood pressure, metabolism, body temperature and other body functions) white blood counts, gamma globulins (antibodies in blood that prevent some infections), opsonins (a substance in blood serum that helps prevent cell destruction) and overall antibody levels.
The first line of phagocytic cellular populations are neutrophils, monocytes/macrophages, dendritic cells, barriers (skin), secretory molecules consisting of various chemokines, cytokines, complement system and opsonins, and natural killer cells (Dranoff, 2004; Tizard, 2012).
A study by Ahrenholz has shown that irrigation with these solutions not only dilute bacterial mass, but also impair bacterial phagocytosis because of dilution of defensive proteins like opsonins.
This is by the presence of complement, antibodies and opsonins in serum.
PpA proteolytically cleaves proPO into two active peptides, which can then function as opsonins (1, 2), catalyze the hydroxylation of tyrosine to dopa, or both.