HLA-DQ9
HLA-DQ9 is a human leukocyte antigen serotype within the HLA-DQ (DQ) serotype group. The serotype is determined by the antibody recognition of β9 subset of DQ β-chains. The β-chain of DQ is encoded by the HLA-DQB1 gene. DQ9 is a split antigen of the DQ3 broad antigen, and it is the second most common DQ antigen in the Japanese population.
Structure and Function[edit | edit source]
HLA-DQ9 is a cell surface receptor protein found on antigen presenting cells. It is involved in the immune system's response to foreign substances. The protein is a heterodimer consisting of an α and β chain, which are encoded by separate genes, HLA-DQA1 and HLA-DQB1 respectively. The combination of these two chains forms a binding site for peptides, which are then presented to T cells to initiate an immune response.
Disease Association[edit | edit source]
HLA-DQ9 has been associated with several autoimmune diseases, including type 1 diabetes, rheumatoid arthritis, and celiac disease. The mechanism of this association is not fully understood, but it is believed to involve the presentation of self-peptides to T cells, leading to an autoimmune response.
Distribution[edit | edit source]
HLA-DQ9 is most commonly found in East Asian populations, particularly in Japan. It is less common in other populations, such as those of European or African descent.
See Also[edit | edit source]
Navigation: Wellness - Encyclopedia - Health topics - Disease Index - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes
Search WikiMD
Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD
WikiMD is not a substitute for professional medical advice. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
Contributors: Prab R. Tumpati, MD