In addition, in that study the intensity and level of expression of the genes analyzed (IL-8, GRO-α, GRO-β, TNF-α, IL-1β, TGF-β1 and IL-10) varied according to the step of infection (3, 10 and 24 h after the addition of bacteria to the cell culture). The gene discussed is CXCL1; the disease is infection.