GATA3 and type 1 diabetes mellitus: Moreover, T-bet (1.53 ± 1.21 vs. 0.97 ± 0.49, P=0.0232) and GATA3 (1.57 ± 0.91 vs. 0.95 ± 0.59, P=0.0089) mRNA expression was decreased in the T1D patients compared to the T2D patients (Figure 1B).