Comment on "Stability of human rapamycin-expanded CD4+CD25+ T regulatory cells" Haematologica 2011;96(9):1357-65

Stability of human rapamycin-expanded CD4+CD25+ T regulatory cells.

BACKGROUND The clinical use of ex vivo-expanded T-regulatory cells for the treatment of T-cell-mediated diseases has gained increasing momentum. However, the recent demonstration that FOXP3(+) T-regulatory cells may contain interleukin-17-producing cells and that they can convert into effector cells once transferred in vivo raises significant doubts about their safety. We previously showed that...

CD4CD25 Regulatory Cells in Human Peripheral Blood

Thymectomy in mice on neonatal day 3 leads to the development of multiorgan autoimmune disease due to loss of a CDCD25 T cell regulatory population in their peripheral lymphoid tissues. Here, we report the identification of a CD4 population of regulatory T cells in the circulation of humans expressing high levels of CD25 that exhibit in vitro characteristics identical with those of the CD4CD25 ...

CD4CD25 Regulatory T Cells Preventing Detrimental Autoimmune Reactions

Objective: Autoimmune diseases will occur when the immune response inflicts damage to tissues in the body. Attempts to overcome this disease have a lot to do but they have not yielded satisfying results. In this study, the function of CD4CD25 regulatory T cells was evaluated for therapeutic potential to prevent the development of autoreactive T

Differential Responses of Human Regulatory T Cells (Treg) and Effector T Cells to Rapamycin

BACKGROUND The immunosuppressive drug rapamycin (RAPA) promotes the expansion of CD4(+) CD25(high)Foxp3(+) regulatory T cells via mechanisms that remain unknown. Here, we studied expansion, IL-2R-gamma chain signaling, survival pathways and resistance to apoptosis in human Treg responding to RAPA. METHODOLOGY/PRINCIPAL FINDINGS CD4(+)CD25(+) and CD4(+)CD25(neg) T cells were isolated from PBMC...

Human Cord Blood CD4CD25 Regulatory T Cells Suppress Prenatally Acquired T Cell Responses to Plasmodium falciparum Antigens