The extracts of green tea (16 μg/mL), oolong tea (4 and 8 μg/mL) and black tea (16 and 32 μg/mL), and catechin compound (1.6 and 3.2 μg/mL) were able to upregulate Ki-67 gene expression in Caco-2 cells during infection (Figure 4). Here, MKI67 is linked to infection.