| 单词 | antigen |
| 释义 | antigen (once / 31858 pages) n An antigen is a substance that your immune system reacts against. A harmful virus is one kind of antigen. When your immune system detects some toxic foreign body or substance, it sends up defenses against this antigen called antibodies. This ability of your body, to protect you against bacteria and other antigens, helps keep you healthy. Antigen comes from a French word, antigène, from Greek root anti-, "against, and the word-forming suffix -gen, "thing that produces or causes." WORD FAMILYantigen: antigenic, antigens+/antigenic: antigenically USAGE EXAMPLESThey found evidence for strong positive selection on the regulatory region of the human leucocyte antigen gene HLA-DQA1 in the ancient population. The Guardian(Dec 19, 2016) Still, they’re closely monitoring what they described as a barely detectable but abnormally high level of the antigen. Washington Times(Nov 21, 2016) They use coding sequenced from the viruses to instruct cells to produce protein antigens, which induce an immune reaction. Seattle Times(Oct 20, 2016) n any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies) Hypo|Hyper immunizing agent, immunogen any substance or organism that provokes an immune response (produces immunity) when introduced into the body agglutinogenany substance that acts as an antigen to cause agglutinin production fetoprotein, foetoproteinany of several antigens that occur naturally in the fetus and sometimes in adults with cancer anatoxin, toxoida 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 Rh, Rh factor, rhesus factora 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 vaccine, vaccinumimmunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies toxin antitoxina mixture of toxin and antitoxin used to immunize against a disease isoagglutinogenan antigen capable of causing the production of (or reacting with) an isoagglutinin AFP, alpha fetoprotein, alpha foetoproteinan abnormally large amount of this fetoprotein in the fetus can signal an abnormality of the neural tube (as spina bifida or anencephaly) substance a particular kind or species of matter with uniform properties |
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