Abstract
The thymus is a primary lymphoid organ where major types of T lymphocytes undergo essential developmental processes. Eosinophils are among the cell types present in microenvironments within the thymus, and perhaps surprisingly, the role of thymic eosinophils, especially during homeostatic conditions, remains unclear. Major physiological events impact thymic organization and function throughout life: including age-related involution, pregnancy, and exposure to chemotherapy or radiation. In this Review, we summarize literature that has explored factors that regulate the accumulation, phenotype, and location of thymic eosinophils during homeostatic development and during conditions where homeostasis is perturbed. Further, we discuss the current theories as to the function of thymic eosinophils, and we consider how the heterogeneity of thymic eosinophil populations may reflect a temporal, spatial, and situational multi-functionality of thymic eosinophils.
Published Version
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