In the MTT assay viability of non-stimulated PBMC was significantly
higher in the REE-300 group than in REE-100 group and control (Fig.1, left). The ConA stimulated cells showed no significant differences. For the SI no significant differences could be observed but it ranked highest in the control group (Table 6). In contrast non-stimulated PBMC showed no differences in viability in the AB assay (Fig. 1, right). The proliferation of stimulated cells increased significantly in REE-300 group. Furthermore, the SI was significantly higher in that group than in the other groups (Table 6).