LCN2 and acute kidney injury: The tissue expression of Ngal, a known biomarker of AKI, significantly increased from day 7, whereas Tagln expression considerably increased from day 3 and remained until day 14 (Ngal: sham 0.22%, day 3 0.51%, p value 0.141; Tagln: sham 0.18%, day 3 18.79%, p < 0.001).