Send to

Choose Destination
J Leukoc Biol. 2011 Jan;89(1):127-36. doi: 10.1189/jlb.1009696. Epub 2010 Oct 19.

Adenosine deaminase potentiates the generation of effector, memory, and regulatory CD4+ T cells.

Author information

Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, Spain.


By interacting with CD26 on the CD4+ T cell surface and with the AdoR A(₂B) on the DC surface, ADA triggers a costimulatory signal for human T cells. The aim of this study was to know whether ADA-mediated costimulation plays a role in the differentiation of T cells. The results show that irrespective of its enzymatic activity and dependent on TNF-α, IFN-γ, and IL-6 action, ADA enhanced the differentiation of CD4+CD45RA+CD45RO⁻ naïve T cells toward CD4+CD25+CD45RO+ Teffs and CD4+CD45RA⁻CD45RO+ memory T cells. Furthermore, ADA potentiated generation of CD4+CD25(high)Foxp3+ Tregs by a mechanism that seems to be mainly dependent on the enzymatic activity of ADA. Interestingly, an ADA-mediated increase on Teff, memory T cell, and Treg generation occurred, not only in cocultures from healthy individuals but also from HIV-infected patients. These data suggest that ADA is a relevant modulator of CD4+ T cell differentiation, even in cells from immunologically compromised individuals.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center