Keywords: Muscle, Aging, NAD
Motivation: NAD is a metabolite of interest in the investigation of muscle with aging and disease; and it can be measured using 31P MRS.
Goal(s): We aimed to quantify NAD in two different muscle groups in a cohort of healthy controls and in patients with a known muscle disease, at 3 T.
Approach: Besides assessing total NAD concentrations, we attempted to quantify both NAD+ and NADH following simulations to assess the robustness to separate both resonances on a 3-T clinical system.
Results: Total NAD correlated negatively with age, demonstrated differences between muscles and decreased with disease; while robust separation between NAD+-NADH remained challenging.
Impact: Since NAD is abundant in living cells and sensitive to change (age, disease, exercise, supplementation) and 31P MRS allows its quantification, this metabolite can serve as a potential quantitative MR biomarker in skeletal muscle studies.
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