We analyzed whether there is an association between Tregs cells (CD4+CD25+CD127<sup>low</sup> and CD4+CD25+FoxP3+); memory T cells (CD4+CD45RO+); memory B cells (CD19+CD27-IgD-); and CD21<sup>low</sup> B cells (CD19+CD38<sup>low</sup>CD21<sup>low</sup>); as well as autoimmune manifestations in 36 patients with CVID (25 women and 11 men, mean age 24 years), all by flow cytometry.
In conclusion, these data suggest compromised homeostasis of CD4(+)CD25(HIGH)FOXP3(+) cells in a subset of CVID patients with autoimmunity, and may implicate Treg cells in pathological mechanisms of CVID.