In our study, both uNGAL and TIMP-2*IGFBP7 levels in preterm neonates without AKI were lower compared to healthy term infants (p = 0.007 e p < 0.0001, respectively) and not influenced by GA and BW, whereas previous studies showed an inverse relationship between uNGAL and GA or BW [39, 43, 45, 46]. The gene discussed is TIMP2; the disease is acute kidney injury.