Journal
ALLERGY
Volume 76, Issue 6, Pages 1693-1706Publisher
WILEY
DOI: 10.1111/all.14662
Keywords
allergy; basophil; IgE; IL‐ 4
Categories
Funding
- Japan Society for the Promotion of Science [19H01025, 19K07620, 20K16277]
- Grants-in-Aid for Scientific Research [19H01025, 20K16277, 19K07620] Funding Source: KAKEN
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Basophils are rare granulocytes that play crucial roles in allergic inflammation by releasing effector molecules to regulate immune responses and allergic disorders. They are recruited to inflamed tissues and activated in various ways, highlighting their versatile functions in the immune system.
Basophils are the rarest granulocytes which represent <1% of peripheral blood leukocytes. Basophils bear several phenotypic similarities to tissue-resident mast cells and therefore had been erroneously considered as blood-circulating mast cells. However, recent researches have revealed that basophils play nonredundant roles in allergic inflammation, protective immunity against parasitic infections and regulation of innate and acquired immunity. Basophils are recruited to inflamed tissues and activated in an IgE-dependent or IgE-independent manner to release a variety of effector molecules. Such molecules, including IL-4, act on various types of cells and play versatile roles, including the induction and termination of allergic inflammation and the regulation of immune responses. Recent development of novel therapeutic agents has enabled us to gain further insights into basophil biology in human disorders. In this review, we highlight the recent advances in the field of basophil biology with a particular focus on the role of basophils in allergic inflammation. Further studies on basophils and their effector molecules will help us identify novel therapeutic targets for treating allergic disorders.
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