Alessandro Usiello is the principal investigator at the CEINGE Biotecnologie Avanzate Institute (Naples, Italy) and a full professor in clinical biochemistry at the Università degli Studi della Campania Luigi Vanvitelli. Their research is focused on the role of d-amino acids' metabolism in the mammalian brain, from preclinical studies to clinical application; and the dysfunction of the basal ganglia in animal models and PD patients.