Figure 2. Percentage of cell activation of peripheral blood mononuclear cells (PBMC) that were stimulated with PHA (Phytohemagglutinin), and exposed to the VTsp, in a 72h culture. Activation analysis of (A) CD4⁺CD69⁺, (B) CD4⁺HLADR⁺, (C) CD8CD69⁺, (D) CD8⁺HLADR⁺, cell populations exposed to Tityus sp. venom (252, 126, and 63 µg/mL) comparing RA patients and healthy controls.