GPT and acute kidney injury: As recently reported by Chuang et al, renal involvement is underestimated, and they found it in 52% of the cases with a significant association between acute kidney injury (AKI) and age and alanine transaminase (ALT) level: the younger the age and/or the higher the ALT value, the more important it is to check renal function during both acute and convalescent phases.