Objective: Little is known about how metabolic perturbations are linked to hyperuricemia in the general population. Therefore we aimed to examine metabolomics profiles in relation to uric acid change and incident hyperuricemia.
Methods: This study included 1,621 community-dwelling Chinese participants ages 50-70 years without hyperuricemia at baseline, with a mean duration of follow-up of 6 years. A total of 56 metabolites (22 amino acids and 34 acylcarnitines) at baseline were quantified by gas or liquid chromatography coupled to mass spectrometry. Annual change in uric acid was calculated, and incident hyperuricemia was defined as plasma uric acid >420 μmoles/liter in men and >360 μmoles/liter in women.
Results: The mean ± SD annual change in uric acid was 9.6 ± 12.1 μmoles/liter and the incidence of hyperuricemia was 23.1% (375 of 1,621). After adjustment for conventional risk factors, 9 metabolites (cysteine, glutamine, phenylalanine, threonine, and long-chain acylcarnitines C14:1OH, C18, C18:2, C20, and C20:4) were significantly associated with uric acid change (Bonferroni corrected P < 0.05) and with incident hyperuricemia (relative risks ranged from 1.14 to 1.21 per SD increment of metabolites; P < 0.05). A network analysis showed significant associations between the module containing long-chain acylcarnitines and incident hyperuricemia. Moreover, levels of these 9 metabolites were specifically correlated with intake of foods, including red and processed meat or soy products.
Conclusion: Plasma cysteine, glutamine, phenylalanine, threonine, and long-chain acylcarnitines are positively associated with incident hyperuricemia. The levels of these metabolites may be partially driven by intakes of meat and soy products that are associated with hyperuricemia.
© 2019, American College of Rheumatology.