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Overnight changes in uric acid, xanthine oxidoreductase and oxidative stress levels and their relationships with sleep-disordered breathing in patients with coronary artery disease

A Comment to this article was published on 06 September 2023

Abstract

Serum uric acid (UA) level is associated with the high cumulative incidence or prevalence of coronary artery disease (CAD), and hyperuricemia is considered as an independent risk marker for CAD. Sleep-disordered breathing (SDB) is also associated with an increased risk of CAD. Several studies have shown that SDB is associated with hyperuricemia, but the mechanisms are unclear. We measured serum levels of UA and xanthine oxidoreductase (XOR) activity and urinary levels of 8-hydroxy-2’-deoxyguanosine (8-OHdG), all of which were assessed at 6 p.m. and the following 6 a.m. in males with CAD. In addition, nocturnal pulse oximetry was performed for the night. Overall 32 eligible patients with CAD were enrolled. Serum UA levels significantly increased overnight. (5.32 ± 0.98 mg/dl to 5.46 ± 1.02 mg/dl, p < 0.001) Moreover, XOR activity and urinary 8-OHdG levels significantly increased from 6 p.m. to 6 a.m. Furthermore, 3% Oxygen desaturation index (ODI) was correlated with the overnight changes in XOR activity (r = 0.36, P = 0.047) and urinary 8-OHdG levels (r = 0.41, P = 0.02). In addition, 3%ODI was independently correlated with the changes in XOR activity (correlation coefficient, 0.36; P = 0.047) and 8-OHdG (partial correlation coefficient, 0.63; P = 0.004) in multivariable analyses. SDB severity was associated with the overnight changes in XOR activity and urinary 8-OHdG, suggesting that SDB may be associated with oxidative stress via UA production. This trial is registered at University Hospital Medical Information Network (UMIN), number: UMIN000021624.

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Acknowledgements

We thanks the patients and all staff in Juntendo University Hospital for their important contributions.

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This study was funded by Sanwa Kagaku Kenkyusho Co.

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Correspondence to Takatoshi Kasai.

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TK received research funds from Sanwa Kagaku Kenkyusho Co. and ResMed. AS and RN are affiliated with a department endowed by Philips, ResMed, and Fukuda Denshi. HD reports honoraria from Amgen Astellas, Daiichi Sankyo, Kowa, MSD, and research grant from Canon, and scholarship grant from Otsuka, Sanofi, MSD, Daiichi Sankyo, Pfizer, Mitsubishi Tanabe, Astellas, Takeda, Teijin, Shionogi, Actelion, Kowa, Bayer, Boehringer Ingelheim, and courses endowed by Phillips, Resmed, Fukuda Denshi, Asahikasei, Inter-Reha, and Toho Holdings. Takayo Murase and Takashi Nakamura are employed by Sanwa Kagaku Kenkyusho Co. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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Shimizu, M., Kasai, T., Naito, R. et al. Overnight changes in uric acid, xanthine oxidoreductase and oxidative stress levels and their relationships with sleep-disordered breathing in patients with coronary artery disease. Hypertens Res 46, 2293–2301 (2023). https://doi.org/10.1038/s41440-023-01331-w

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