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Review

Nature Reviews Immunology 2, 760–772 (1 October 2002) | doi:10.1038/nri913

Development of |[alpha]||[beta]| T cells in the human thymus

Hergen Spits

The thymus is the main producer of αβ T cells and is, therefore, crucial for a normal immune system. The intrathymic developmental pathway of human αβ T cells has now been delineated. The production of new T cells by the thymus decreases with age, and the thymus was thought to be redundant in adults once the peripheral T-cell pool has been formed early in life. However, recent work has shown that the thymus can function even at an advanced age. Research into the production of T cells in clinical settings that are associated with loss of T cells in the periphery has sparked renewed interest in the function of the human thymus.