specific antigen

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• Prostate specific antigen — (PSA) is a protein produced by the cells of the prostate gland. PSA is present in small quantities in the serum of normal men, and is often elevated in the presence of prostate cancer and in other prostate disorders. A blood test to measure PSA… …   Wikipedia

• tissue-specific antigen — noun (immunology) An antigen present in a certain tissue but not found in other tissues • • • Main Entry: ↑tissue …   Useful english dictionary

• Group-specific antigen — is the genetic material that codes for the core structural proteins of a retrovirus.It comprises part of the gag onc fusion protein.External links* [http://www.stanford.edu/group/nolan/tutorials/ret 6 gpedesc.html Diagram at stanford.edu] * * …   Wikipedia

• prostate-specific antigen — n a protease that is secreted by the epithelial cells of the prostate and is used in the diagnosis of prostate cancer since its concentration in the blood serum tends to be proportional to the clinical stage of the disease abbr. PSA * * * (PSA) a …   Medical dictionary

• prostate-specific antigen test — A blood test that measures the level of prostate specific antigen (PSA), a substance produced by the prostate and some other tissues in the body. Increased levels of PSA may be a sign of prostate cancer …   English dictionary of cancer terms

• tumour specific antigen — (= tumour specific transplantation antigen; TSTA) Antigen on tumour cells detected by cell mediated immunity. For virus transformed cells TSTA (unlike T antigen) is found to differ for different individual tumours induced by the same virus. May… …   Dictionary of molecular biology

• organ-specific antigen — any antigen that occurs exclusively in a particular organ and serves to distinguish it from other organs. Two types of organ specificity have been proposed: (1) first order or tissue specificity is attributed to the presence of an antigen… …   Medical dictionary

• Test, prostate specific antigen — A test used to screen for cancer of the prostate and to monitor treatment. PSA is a protein produced by the prostate gland. Although most PSA is carried out of the body in semen, a very small amount escapes into the blood stream. The PSA test is… …   Medical dictionary

• tumor-specific antigen — (TSA) any cell surface antigen of a tumor that does not occur on normal cells of the same origin …   Medical dictionary

• tissue-specific antigen — organ specific a …   Medical dictionary

• Antigen — Each antibody binds to a specific antigen; an interaction similar to a lock and key. An antigen is a foreign molecule that, when introduced into the body, triggers the production of an antibody by the immune system. The immune system will then… …   Wikipedia