CD8A and Alzheimer disease: The sentence can be: We observed a slight increase of T cell subsets (CD3+, CD4+, CD8+ T cells) in TET-AD patients compared to TET patients although differences did not reach statistical significance, similar values of CD4/CD8 ratio, normally greater than 1 (31) in TET and TET-AD patients were also detected: 0.91 ± 0.13 and 0.95 ± 0.09 (mean ± SEM), respectively.