Table II.
Adenosine downregulates telomerase activity in CD8 T lymphocytes
| ADA Inhibitor | Adenosine/ADA Inhibitor | |
| Donor | ||
| 1 | 0.888 | 0.520 |
| 2 | 0.936 | 0.374 |
| 3 | 0.926 | 0.687 |
| 4 | 1.036 | 0.519 |
| Mean ± SD | 0.946 ± 0.0632 | 0.493 ± 0.0826 |
| value | 0.14 | 0.00031 |
Purified CD8+ T cells from cultures established from four individual donors were isolated after the second stimulation (with Ab-coated microbeads). The TRAP assay was performed on 2500 cell equivalents. For each donor, the fold change in telomer-ase activity of cultures containing either the ADA inhibitor alone or adenosine plus the ADA inhibitor as compared with the DMSO control is shown.