<p><b>A</b>. CD4<sup>+</sup> T cells were stained with anti-FOXP3, -CD25, -CD45RA and CD127 antibodies and analyzed by flow cytometry. Expression of CD25 and CD127 defines 3 populations of memory (CD45RA<sup>−</sup>) CD4<sup>+</sup> T cells: conventional CD25<sup>−</sup>CD127<sup>+</sup> and CD25<sup>−</sup>CD127<sup>−</sup> and Treg CD25<sup>+</sup>CD127<sup>−</sup> (left dot plot, numbers correspond to the proportion of each subset among memory CD4<sup>+</sup> T cells). Histograms show the expression of FOXP3 in the defined memory CD4<sup>+</sup> T-cell subsets. <b>B</b>. The proportion of conventional CD25<sup>−</sup>CD127<sup>+</sup> and CD25<sup>−</sup>CD127<sup>−</sup> and Treg CD25<sup>+</sup>CD127<sup>−</sup> subsets, defined in <b>A</b>, among memory CD4<sup>+</sup> T cells of healthy donors (HD, n = 27) and patients (P, n = 18).</p
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