|
HLA-B57
HLA-B57 (B57) is an HLA- B serotype. B57 is a split antigen from the B17 broad antigen, the sister serotype B58. The serotype identifies the more common HLA-B*58 gene products. (For terminology help see: HLA-serotype tutorial.) Like B58, B57 is involved in drug-induced inflammatory skin disorders. Disease HLA-B*5701 is associated with drug-induced inflammatory disease of the skin. Individuals with B57 are more sensitive to the drug abacavir. Abacavir is an antiretroviral drug used in treatment of HIV, however in sensitive individuals fever, skin rash, fatigue, gastrointestinal symptoms such as nausea, vomiting, diarrhea or abdominal pain and respiratory symptoms such as pharyngitis, dyspnea, or cough can develop. FDA has advised that people from at-risk ethnic groups, (see table on the left) be screened prior to drug-therapy.https://www.fda.gov/cder/drug/InfoSheets/HCP/abacavirHCP.htm FDA abacavir alert web access July 29, 2008 ote: phenotype frequencies are roughly double a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HLA-B
HLA-B (major histocompatibility complex, class I, B) is a human gene that provides instructions for making a protein that plays a critical role in the immune system. HLA-B is part of a family of genes called the human leukocyte antigen (HLA) complex. The HLA complex helps the immune system distinguish the body's own proteins from proteins made by foreign invaders such as viruses and bacteria. HLA is the human version of the major histocompatibility complex (MHC), a gene family that occurs in many species. Genes in this complex are separated into three basic groups: class I, class II, and class III. In humans, the HLA-B gene and two related genes, HLA-A and HLA-C, are the major genes in MHC class I. MHC class I genes provide instructions for making proteins that are present on the surface of almost all cells. On the cell surface, these proteins are bound to protein fragments (peptides) that have been exported from within the cell. MHC class I proteins display these peptides to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HLA-B17
HLA-B17 (B17) is an HLA - B serotype A serotype or serovar is a distinct variation within a species of bacteria or virus or among immune cells of different individuals. These microorganisms, viruses, or cells are classified together based on their surface antigens, allowing the e .... B17 is a broad antigen serotype that recognizes the B57 and B58 split antigen serotypes. B17 is still encountered in the current literature, although most studies now use B57/B58 or gene typing designators. Both serotypes are involved in slightly different drug-sensitive diseases. References {{HLA-B serotypes 1 Drug-sensitivity genes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HLA-B58
HLA-B58 (B58) is an HLA- B serotype. B58 is a split antigen from the B17 broad antigen, the sister serotype B57. The serotype identifies the more common HLA-B*58 gene products. (For terminology help see: HLA-serotype tutorial) B*5801 is associated with allopurinol induced inflammatory necrotic skin disease. Serotype Allele distribution Disease HLA-B*5801 is involved in allopurinol sensitive drug induced Stevens–Johnson syndrome Stevens–Johnson syndrome (SJS) is a type of severe skin reaction. Together with toxic epidermal necrolysis (TEN) and Stevens–Johnson/toxic epidermal necrolysis (SJS/TEN), it forms a spectrum of disease, with SJS being less severe. Eryth .... Allopurinol is a frequent cause of severe cutaneous adverse reactions, including drug-hypersensitivity syndrome, Stevens–Johnson syndrome, and toxic epidermal necrolysis (SJS/TEN). The association with allopurinol sensitivity in SJS/TEN was extremely strong in Asia, and somewhat less associated i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abacavir
Abacavir, sold under the brand name Ziagen among others, is a medication used to treat HIV/AIDS. Similar to other nucleoside analog reverse-transcriptase inhibitors (NRTIs), abacavir is used together with other HIV medications, and is not recommended by itself. It is taken by mouth as a tablet or solution and may be used in children over the age of three months. Abacavir is generally well tolerated. Common side effects include vomiting, insomnia (trouble sleeping), fever, and feeling tired. Other common side effects include loss of appetite, headache, nausea (feeling sick), diarrhea, rash, and lethargy (lack of energy). More severe side effects include hypersensitivity, liver damage, and lactic acidosis. Genetic testing can indicate whether a person is at higher risk of developing hypersensitivity. Symptoms of hypersensitivity include rash, vomiting, and shortness of breath. Abacavir is in the NRTI class of medications, which work by blocking reverse transcriptase, an enzym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antiretroviral Drug
The management of HIV/AIDS normally includes the use of multiple antiretroviral drugs as a strategy to control HIV infection. There are several classes of antiretroviral agents that act on different stages of the HIV life-cycle. The use of multiple drugs that act on different viral targets is known as highly active antiretroviral therapy (HAART). HAART decreases the patient's total burden of HIV, maintains function of the immune system, and prevents opportunistic infections that often lead to death. HAART also prevents the transmission of HIV between serodiscordant same sex and opposite sex partners so long as the HIV-positive partner maintains an undetectable viral load. Treatment has been so successful that in many parts of the world, HIV has become a chronic condition in which progression to AIDS is increasingly rare. Anthony Fauci, head of the United States National Institute of Allergy and Infectious Diseases, has written, "With collective and resolute action now and a ste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Locus (genetics)
In genetics, a locus (plural loci) is a specific, fixed position on a chromosome where a particular gene or genetic marker is located. Each chromosome carries many genes, with each gene occupying a different position or locus; in humans, the total number of protein-coding genes in a complete haploid set of 23 chromosomes is estimated at 19,000–20,000. Genes may possess multiple variants known as alleles, and an allele may also be said to reside at a particular locus. Diploid and polyploid cells whose chromosomes have the same allele at a given locus are called homozygous with respect to that locus, while those that have different alleles at a given locus are called heterozygous. The ordered list of loci known for a particular genome is called a gene map. Gene mapping is the process of determining the specific locus or loci responsible for producing a particular phenotype or biological trait. Association mapping, also known as "linkage disequilibrium mapping", is a method ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosome 6 (human)
Chromosome 6 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 6 spans more than 170 million base pairs (the building material of DNA) and represents between 5.5 and 6% of the total DNA in cells. It contains the major histocompatibility complex, which contains over 100 genes related to the immune response, and plays a vital role in organ transplantation. Genes The human leukocyte antigen lies on chromosome 6, with the exception of the gene for β2-microglobulin (which is located on chromosome 15), and encodes cell-surface antigen-presenting proteins among other functions. Number of genes In 2003, the entirety of chromosome 6 was manually annotated for proteins, resulting in the identification of 1,557 genes, and 633 pseudogenes. The following are some of the newer gene count estimates. Because researchers use different approaches to genome annotation their predictions of the number of genes on each chromosome var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human Leukocyte Antigen
The human leukocyte antigen (HLA) system or complex is a complex of genes on chromosome 6 in humans which encode cell-surface proteins responsible for the regulation of the immune system. The HLA system is also known as the human version of the major histocompatibility complex (MHC) found in many animals. Mutations in HLA genes may be linked to autoimmune disease such as type I diabetes, and celiac disease. The HLA gene complex resides on a 3 Mbp stretch within chromosome 6, p-arm at 21.3. HLA genes are highly polymorphic, which means that they have many different alleles, allowing them to fine-tune the adaptive immune system. The proteins encoded by certain genes are also known as ''antigens'', as a result of their historic discovery as factors in organ transplants. HLAs corresponding to MHC class I ( A, B, and C), all of which are the HLA Class1 group, present peptides from inside the cell. For example, if the cell is infected by a virus, the HLA system brings f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serotype
A serotype or serovar is a distinct variation within a species of bacteria or virus or among immune cells of different individuals. These microorganisms, viruses, or cells are classified together based on their surface antigens, allowing the epidemiologic classification of organisms to the subspecies level. A group of serovars with common antigens is called a serogroup or sometimes ''serocomplex''. Serotyping often plays an essential role in determining species and subspecies. The '' Salmonella'' genus of bacteria, for example, has been determined to have over 2600 serotypes. '' Vibrio cholerae'', the species of bacteria that causes cholera, has over 200 serotypes, based on cell antigens. Only two of them have been observed to produce the potent enterotoxin that results in cholera: O1 and O139. Serotypes were discovered by the American microbiologist Rebecca Lancefield in 1933. Role in organ transplantation The immune system is capable of discerning a cell as being 'self' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Split Antigen
Split(s) or The Split may refer to: Places * Split, Croatia, the largest coastal city in Croatia * Split Island, Canada, an island in the Hudson Bay * Split Island, Falkland Islands * Split Island, Fiji, better known as Hạfliua Arts, entertainment, and media Films * ''Split'' (1989 film), a science fiction film * ''Split'' (2016 American film), a psychological horror thriller film * ''Split'' (2016 Canadian film), also known as ''Écartée'', a Canadian drama film directed by Lawrence Côté-Collins * ''Split'' (2016 South Korean film), a sports drama film * '' Split: A Divided America'', a 2008 documentary on American politics * ''The Split'' (1959 film) or ''The Manster'', a U.S.-Japanese horror film * ''The Split'' (film), a 1968 heist film Games * Split (poker), the division of winnings in the card game * Split (blackjack), a possible player decision in the card game Music Albums * ''Split'' (The Groundhogs album), 1971 * ''Split'' (Lush album), 1994 * ''Split ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broad Antigen
Broad(s) or The Broad(s) may refer to: People * A slang term for a woman. * Broad (surname), a surname Places * Broad Peak, on the border between Pakistan and China, the 12th highest mountain on Earth * The Broads, a network of mostly navigable rivers and lakes in the English counties of Norfolk and Suffolk, United Kingdom **The Broads include several areas of navigable water known as Broads; the largest is Hickling Broad (see :Norfolk Broads) * The Broads (New Hampshire), a wide portion of Lake Winnipesaukee in Belknap County, New Hampshire, United States * Broad Bay (other) * Broad Canal, East Cambridge, Massachusetts, United States * Broad Channel, a neighborhood in Queens, United States * Broad Crag, a fell in the English Lake District, United Kingdom * Broad Creek (other) * Broad River (other) * Broad Run (other) * Broad Sound (other) * Broad Valley, Graham Land, Antarctica * Broad Water, a salt water lagoon near T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
