Macrophages have no lineage history of Foxp3 expression.

To the editor: Forkhead box P3 (Foxp3) is a transcription factor critical for the differentiation of regulatory T cells (Tregs) and for the prevention of autoimmune disease. Although expression of Foxp3 was initially found to be restricted to CD4+CD25+ T cells,[1][1] some research groups have

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