Figure 2.

B and T lymphocyte attenuator (BTLA) down-regulation and human immunodeficiency virus (HIV)-1 disease progression. The correlation analysis is between BTLA expression on CD4⁺ T cells with CD4⁺ T-cell numbers (n = 71), HIV load (n = 71), and CD38 expression on CD8 T cells (n = 30; A) as well as the expression of Ki67 (n = 18), PD-1 expression (n = 30), and CD127 (n = 21; B) on CD4 T cells in HIV-1–infected patients. P values are shown. The Spearman rank correlation test was used to evaluate the correlations between variables.