| histo-blood group B transferase | <enzyme> Catalyses transfer of galactose from udp-galactose to glycoproteins and glycolipids; differs from a transferase by four amino acid residues Registry number: EC 2.4.1.- Synonym: b transferase, histo-blood group (26 Jun 1999) |
|---|---|
| histoangic | Relating to the structure of blood vessels, especially in terms of their function. Synonym: histangic. Origin: histo-+ G. Angeion, vessel (05 Mar 2000) |
| histoblast | Population of small diploid epithelial cells in Dipteran larvae that do not form typical imaginal discs, yet resemble them in some ways. (18 Nov 1997) |
| histochemistry | Study of the chemical composition of tissues by means of specific staining reactions. (18 Nov 1997) |
| histocompatibility | If tissues of two organisms are histocompatible, then grafts between the organisms will not be rejected. If, however, major histocompatibility antigens are different then an immune response will be mounted against the foreign tissue. (18 Nov 1997) |
| histocompatibility antigen | <immunology> A set of plasmalemmal glycoproteins on the surface of all nucleated cells that are crucial for T-cell recognition of antigens. Particularly the HLA system in humans and the H2 system in mice. They are the major antigens responsible for tissue recognition. For this reason, they are of prime importance in determining compatible organ donors for a specific transplantation procedure. Each person has unique HLA antigens. Some HLA antigens have been identified to be correlated with the presence of certain autoimmune diseases. One of these is the HLA-B27 site. Approximately 85% of patients with ankylosing spondylitis and Reiter's syndrome will have the HLA-B27 antigen present on the leukocytes. There are two classes of histocompatibility antigens: 1. Class I, histocompatibility antigens composed of two glycosylated subunits, a heavy chain of 44 kD and beta2 microglobulin (12 kD). The heavy chain may be coded by K, D or L genes of mouse H2 and A, B or C genes of human HLA complex. Class I antigens are important in T-cell killing and are recognised in conjunction with the foreign cell surface antigens MHC restriction). 2. Class II antigens, heterodimeric histocompatibility antigens composed of alpha (32 kD) and beta (28 kD) chains. Found mostly on B lymphocytes, macrophages and accessory cells. The response of T helper cells requires that the foreign antigen is presented in conjunction with the appropriate Class II antigens. (Murine H2 Ia antigens and human HLA DR antigens are Class II). (14 Oct 1997) |
| histocompatibility antigens | A group of antigens that includes both the major and minor histocompatibility antigens. The former are genetically determined by the major histocompatibility complex. They determine tissue type for transplantation and cause allograft rejections. The latter are systems of allelic alloantigens that can cause weak transplant rejection. (12 Dec 1998) |
| histocompatibility antigens class I | Large transmembrane, polymorphic glycoproteins noncovalently associated with nonpolymorphic beta 2-microglobulin. In humans, three structural genes on chromosome 6 code for the HLA-a, HLA-b and HLA-c antigens. In mice, three genes named k, d, and l on chromosome 17 code for the h-2 antigens. Class I antigens are found on most nucleated cells and are generally detected by their reactivity with alloantisera. These antigens are recognised during graft rejection and restrict cell-mediated lysis of virus-infected cells. They are primarily associated with rheumatologic diseases and certain malignant disorders. (12 Dec 1998) |
| histocompatibility antigens class II | Large, transmembrane, non-covalently linked glycoproteins (alpha and beta). Both chains can be polymorphic although there is more structural variation in the beta chains. The class II antigens in humans are called HLA-d antigens and are coded by a gene on chromosome 6. In mice, two genes named ia and i.e. On chromosome 17 code for the h-2 antigens. The antigens are found on B-lymphocytes, macrophages, epidermal cells, and sperm and are thought to mediate the competence of and cellular cooperation in the immune response. The term ia antigens used to refer only to the proteins encoded by the ia genes in the mouse, but is now used as a generic term for any class II histocompatibility antigen. (12 Dec 1998) |
| histocompatibility complex | A family of fifty or more genes on the sixth human chromosome that code for cell surface proteins and play a role in the immune response.Histocompatibility genes control the production of proteins on the outer membranes of tissue and blood cells, especially lymphocytes, and are vital elements in cell-cell recognition. The proteins also determine the level and type of immune response, and may serve other biochemical or immunologic functions. In the case of allografts, it is necessary to determine whether donor and recipient possess compatible sets of proteins (histocompatibility antigens), to minimise the likelihood of rejection. Histocompatibility testing (HLA tissue typing) provides this information. (05 Mar 2000) |
| histocompatibility gene | In laboratory animals, a gene which can elicit an immune response and thereby cause rejection of a homograft when tissue is transplanted from one individual to another; in humans, histocompatibility gene's control HLA antigens. Synonym: H gene. (05 Mar 2000) |
| histocompatibility testing | Identification of the major histocompatibility antigens of transplant donors and potential recipients, usually by serological tests. Donor and recipient pairs should be of identical abo blood group, and in addition should be matched as closely as possible for histocompatibility antigens in order to minimise the likelihood of allograft rejection. (12 Dec 1998) |
| histocompatible | The prefix histo- means tissue. The term histocompatible is literally tissue compatible. If a donor and recipient are histocompatible (like identical twins), a transplant will be easily accepted. (12 Dec 1998) |
| histocyte | <pathology> Long lived resident macrophage found within tissues. (11 Jan 1998) |
| histocytochemistry | Study of intracellular distribution of chemicals, reaction sites, enzymes, etc., by means of staining reactions, radioactive isotope uptake, selective metal distribution in electron microscopy, or other methods. (12 Dec 1998) |
Synonyms : Fibrous Histiocytoma, Malignant, Fibrous Histiocytomas, Malignant, Histiocytomas, Malignant Fibrous, Malignant Fibrous Histiocytomas
Synonyms : Histiocytoses
Synonyms : Hand-Schueller-Christian Syndrome, Histiocytosis, Generalized, Histiocytosis-X, Letterer-Siwe Disease, Schueller-Christian Disease, Disease, Letterer-Siwe, Disease, Schueller-Christian, Generalized Histiocytoses, Generalized Histiocytosis, Letterer Siwe Disease
Synonyms : Histiocytic Medullary Reticulosis, Malignant Histiocytosis, Histiocytic Medullary Reticuloses, Histiocytoses, Malignant, Malignant Histiocytoses, Medullary Reticuloses, Histiocytic, Medullary Reticulosis, Histiocytic, Reticuloses, Histiocytic Medullary
Synonyms : Disseminatum, Xanthoma, Histiocytosis, Non Langerhans Cell, Non-Langerhans-Cell Histiocytosis, Reticulohistiocytomas
| history |
History is a term for information about the past. When used as the name of a field of study, history refers to the study and interpretation of the record of human societies. The term history comes from the Greek "ιστορία" historia, "an account of one's inquiries," and shares that etymology with the English word story. ...
출처: en.wikipedia.org/wiki/History
|
|---|---|
| history |
HIStory: Past, Present and Future Book I was a double CD released by pop superstar Michael Jackson. The first disc contained hits from his 4 Epic solo albums, while the second disc contained new songs. Producers included: Jimmy Jam & Terry Lewis, Dallas Austin, David Foster, Bill Bottrell and R Kelly. All the singles released from it were hits in Europe, while only "Scream" (duet with sister Janet Jackson) and "You Are Not Alone" were hits in the USA. ...
출처: en.wikipedia.org/wiki/HIStory
|
| histology |
The study of tissues and cells under a microscope.
출처: www.stjude.org/glossary
|
| histone |
A type of protein found in chromosomes. Histones bind to DNA, help give chromosomes their shape, and help control the activity of genes.
출처: www.stjude.org/glossary
|
| histiocytic lymphoma |
An outdated term referring to non-Hodgkin's lymphomas made up of large abnormal lymphoid cells. Histiocytic lymphomas include mature B-cell and T-cell non-Hodgkin's lymphomas. Many tumors that were once called histiocytic lymphomas are now considered to be a type of large cell lymphoma.
출처: www.stjude.org/glossary
|
| HIST | a less in the facts of history |
|---|---|
| HIST | a theatrical performer |
| HIST | characteristic of acting or a stage performance |
| HIST | a performance of play |
| HIST | a deliberate display of emotion for effect |