The increased TGF-α levels, observed at all tested time points except at day 8 post-inoculation with DENV-1 0111/2011 or DENV-2 0126/2010, were statistically significant for both DENV-1 0111/2011 (p≤0.05 at days 4 and 6 post-infection) and DENV-4 BEL 83791 (p≤0.005 at all tested time points post-infection). This evidence concerns the gene TGFA and infection.