antigen

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an·ti·gen

 (ăn′tĭ-jən) also an·ti·gene (-jēn′)
n.
A molecule that is capable of binding to an antibody or to an antigen receptor on a T cell, especially one that induces an immune response. An antigen is usually a foreign substance, such as a toxin or a component of a virus, bacterium, or parasite.

an′ti·gen′ic (-jĕn′ĭk) adj.
an′ti·gen′i·cal·ly adv.
an′ti·ge·nic′i·ty (-jə-nĭs′ĭ-tē) n.

antigen

(ˈæntɪdʒən; -ˌdʒɛn) or

antigene

n
(Biochemistry) a substance that stimulates the production of antibodies
[C20: from anti(body) + -gen]
ˌantiˈgenic adj
ˌantiˈgenically adv

an•ti•gen

(ˈæn tɪ dʒən, -ˌdʒɛn)

n.
1. any substance that can stimulate the production of antibodies and combine specifically with them.
2. any commercial substance that, when injected or absorbed into animal tissues, stimulates the production of antibodies.
3. antigens of a particular type collectively.
[1905–10; anti (body) + -gen]
an`ti•gen′ic, adj.
an`ti•gen′i•cal•ly, adv.
an`ti•ge•nic′i•ty (-dʒəˈnɪs ɪ ti) n.

an·ti·gen

(ăn′tĭ-jən)
A substance that stimulates the production of an antibody when introduced into the body. Antigens include toxins, bacteria, viruses, and other foreign substances. See Note at blood type.

antigen

A molecule recognized as foreign by the body’s immune system, causing the release of antibodies.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.antigen - any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies)
substance - a particular kind or species of matter with uniform properties; "shigella is one of the most toxic substances known to man"
immunizing agent, immunogen - any substance or organism that provokes an immune response (produces immunity) when introduced into the body
immunology - the branch of medical science that studies the body's immune system
agglutinogen - any substance that acts as an antigen to cause agglutinin production
fetoprotein, foetoprotein - any of several antigens that occur naturally in the fetus and sometimes in adults with cancer
anatoxin, toxoid - a bacterial toxin that has been weakened until it is no longer toxic but is strong enough to induce the formation of antibodies and immunity to the specific disease caused by the toxin; "diphtheria toxoid"
antigenic determinant, epitope, determinant - the site on the surface of an antigen molecule to which an antibody attaches itself
Rh, Rh factor, rhesus factor - a blood group antigen possessed by Rh-positive people; if an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia
Translations
antigen
antigeeni
antigén
antígeno
antigen
antigen

antigen

[ˈæntɪdʒən] Nantígeno m

antigen

[ˈæntɪdʒən] nantigène manti-hero antihero [ˈæntihɪərəʊ] nantihéros m

antigen

nAntigen nt

antigen

[ˈæntɪdʒən] nantigene m

an·ti·gen

n. antígeno, sustancia tóxica que estimula la formación de anticuerpos;
carcinoembriogenic ______ carcinoembriogénico.

antigen

n antígeno; carcinoembryonic — antígeno carcinoembrionario; prostate-specific — (PSA) antígeno prostático específico (APE)
References in periodicals archive ?
Caption: Figure 2: CD30 positivity of the HRS cells in the skin lesion (a), sporadic CD20 positivity in the skin lesion (b), leukocyte common antigen (LCA) negative tumorous cells in the dermis (c), PAX5/CD4 coexpression in the HRS cells from the initial axillary lymph node (d), and unusual CD4 immunoreactivity of the HRS cells from the initial axillary lymph node (e).
Leukocyte common antigen and CD20 positivity uniformly seen in DLBCL cases is usually weak to scant in PBL.
Immunohistochemical studies showed positive immunoreactivity of neoplastic cells to cytokeratin and chromogranin [Figure 4a and b], and negative reactivity with AFP, CEA, vimentin, leukocyte common antigen (LCA), CD20 antigen, and neuron-specific enolase (NSE).
Bone marrow examination revealed infiltration by sheets of lymphoid cells which were positive for leukocyte common antigen and CD20.
Malignant lymphoma by negative CD56 & leukocyte common antigen.
In tumour tissue, immunoreaction was observed only by vimentin, but no expressions were observed with pankeratin, epithelial membrane antigen (EMA), carcinoembryonic antigen (CEA), cytokeratin-7, cytokeratin-20, leukocyte common antigen (LCA), smooth muscle actin (SMA), desmin, Myo-D1, chromogranin-A, synaptophysin, S100 protein, HMB45, CD68, CD30, CD34, CD31, factor VIII, alpha feto protein (AFP), beta human chorionic gonadotropin ((beta) hCG), placental alkaline phosphatase (PLAP), and Neu-N.
According to the company, the assay detects the common antigen, Glutamate dehydrogenase, produced by toxigenic and non-toxigenic strains of Clostridium difficile, which are frequently associated with hospital and community acquired diarrhea and can lead to life-threatening complications or death.
The spindle cells were negative for melanin A, HMB-45, epithelial membrane antigen, pankeratin, muscle actin, CD 117, low-molecular-weight keratin, high-molecular-weight keratin, CD34, CD5, factor VIIIa, and CD45/leukocyte common antigen.
A second evaluation is appropriate for persistent symptoms after a negative EIA toxin assay, but is not useful after a negative common antigen test.
For example, a person whose cells lack C antigen--a common antigen in the Rh blood-group system--may form anti-C.

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