Minor time-dependent changes of miR-15-5p and miR-423-5pmiR-15a-5p at day 7 of gentamicin discriminates AKI and non-AKImiR-155-5p & miR-192-5p positively correlate with creatinine and NGAL in vancomycinmiR-192-5p & miR-423-5p positively correlate with PCT and IL-6 in non-nephrotoxic antibiotics. The gene discussed is LCN2; the disease is acute kidney injury.