Basophil | |
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![]() 3D rendering of a basophil | |
Dyed basophil among red blood cells | |
Details | |
System | Immune system |
Identifiers | |
MeSH | D001491 |
TH | H2.00.04.1.02022 |
FMA | 62862 |
Anatomical terms of microanatomy |
Basophils are a type of white blood cell. Basophils are the least common type of granulocyte, representing about 0.5% to 1% of circulating white blood cells.[1] They are the largest type of granulocyte. They are responsible for inflammatory reactions during immune response, as well as in the formation of acute and chronic allergic diseases, including anaphylaxis, asthma, atopic dermatitis and hay fever.[2] They also produce compounds that coordinate immune responses, including histamine and serotonin that induce inflammation, and heparin that prevents blood clotting,[3] although there are less than that found in mast cell granules.[4] Mast cells were once thought to be basophils that migrated from the blood into their resident tissues (connective tissue), but they are now known to be different types of cells.[5]
Basophils were discovered in 1879 by German physician Paul Ehrlich, who one year earlier had found a cell type present in tissues that he termed mastzellen (now mast cells).[6] Ehrlich received the 1908 Nobel Prize in Physiology or Medicine for his discoveries.
The name comes from the fact that these leukocytes are basophilic, i.e., they are susceptible to staining by basic dyes, as shown in the picture.
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