HAVCR1 and acute kidney injury: Using the optimal cutoff value for uNGAL (126 ng/ml) and KIM-1 (0.19 ng/ml) levels as described above, uNGAL was the most sensitive biomarker for predicting the development of AKI (that is, in 16 (84%) of 19 cases using uNGAL concentration versus 11 (58%) of 19 cases using KIM-1 concentration).