Snapshot situation of oxidative degradation of the nervous system, kidney, and adrenal glands biomarkers-neuroprostane and dihomo-isoprostanes-urinary biomarkers from infancy to elderly adults

We analyzed biomarkers of lipid peroxidation of the nervous system -F2-dihomo-isoprostanes, F3-neuroprostanes, and F4-neuroprostanes- in urine samples from 158 healthy volunteers ranging from 4 to 88 years old with the aim of analyzing possible associations between their excretion values and age (years). Ten biomarkers were screened in the urine samples by UHPLC-QqQ-MS/MS. Four F2-dihomo-isoprostanes (ent−7-(R)−7-F2t-dihomo-isoprostane, ent−7-epi−7-F2t-dihomo-isoprostane, 17-F2t-dihomo-isoprostane, 17-epi−17-F2t-dihomo-isoprostane), and one DPA-neuroprostane (4-F3t-neuroprostane) were detected in the samples. On the one hand, we found a significant, positive correlation (Rho: 0.197, P=0.015) between the age increase and the amount of total F2-dihomo-IsoPs. On the other hand, the values were significantly higher in the childhood group (4–12 years old), when compared to the adolescence group (13–17 years old) and the young adult group (18–35 years old). Surprisingly, no significant differences were found between the middle-aged adults (36–64 years old) and the elderly adults (65–88 years old). We display a snapshot situation of excretory values of oxidative stress biomarkers of the nervous system, using healthy volunteers representative of the different stages of human growth and development. The values reported in this study could be used as a basal or starting point in clinical interventions related to aging processes and/or pathologies associated with the nervous system. Keywords: Oxidative stress, Lipid peroxidation, Neuroprostanes, Dihomo-isoprostanes, Age, Urine biomarkers