Hyperuricemia (HUA) is a metabolic disease characterized by disorders of uric acid synthesis and excretion. Theabrownin (TB), a macromolecular water-soluble pigment from black tea, can bring beneficial effects on human health. The effects and underlying molecular mechanisms of TB on HUA animals and patients are still unclear. This study aimed to explore the potential function and the possible mechanisms of TB in improving HUA. Our results demonstrated that TB could reduce the levels of serum uric acid and improve renal pathological damage in HUA mice by inhibiting xanthine oxidase (XOD) activity in the liver and increasing the expression of uric acid transporter proteins in the kidney. Furthermore, TB was proven to suppress autophagy, inflammation, and fibrosis in the kidney of HUA mice. Moreover, a self-controlled clinical trial showed that TB drinking daily for 12 weeks could decrease serum uric acid levels in HUA patients without any adverse effects. In conclusion, TB exhibits significant potential in decreasing serum uric acid levels both in HUA mice and patients, offering a novel approach to HUA treatment.
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http://dx.doi.org/10.1016/j.ijbiomac.2024.139373 | DOI Listing |
BMC Musculoskelet Disord
January 2025
Department of Internal Medicine, Division of Rheumatology, Soonchunhyang University Seoul Hospital, Soonchunhyang University School of Medicine, Seoul, South Korea.
Background: Obstructive sleep apnea (OSA) is linked to various health conditions, including cardiovascular diseases and metabolic disorders. Hyperuricemia and gout may be associated with OSA, but large-scale studies on this are limited. This study aimed to investigate the association between hyperuricemia/gout and OSA using data from the Korea National Health and Nutrition Survey (KNHANES).
View Article and Find Full Text PDFJ Med Internet Res
December 2024
Department of Medical Informatics, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China.
Background: Primary hypertension (PH) poses significant risks to children and adolescents. Few prediction models for the risk of PH in children and adolescents currently exist, posing a challenge for doctors in making informed clinical decisions.
Objective: This study aimed to investigate the incidence and risk factors of PH in Chinese children and adolescents.
Bioorg Chem
December 2024
Good Clinical Practice Development, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital, Southern Medical University, Guangzhou, China. Electronic address:
Inhibition of human concentrative nucleoside transporter 2 (CNT2) could suppress increases in serum urate levels derived from dietary purines. However, the structural basis for substrate recognition of CNT2 is still unknown and only a few inhibitors have been reported. In this study, a homology model of CNT2 was constructed and residues T315, E316, N426, N491, E492, F536 and N538 were identified as binding sites for adenosine through site-directed mutagenesis and a H-adenosine uptake assay.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Saint James School of Medicine, Park Ridge, IL, USA.
Background: Oxidative stress is formed by a perturbation of redox homeostasis and linked to the development of Alzheimer's disease (AD) [1]. This imbalance results in an abundance of free radicals that exceeds the antioxidant capacity. Xanthine oxidase (XO) is an enzyme responsible for producing uric acid through the metabolism of purine nucleotides, specifically hypoxanthine and xanthine to uric acid [2].
View Article and Find Full Text PDFCNS Neurosci Ther
January 2025
Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.
Aims: To analyze the effect of APOE ε4 on fluid biomarkers and the correlations between blood molecules and CSF biomarkers in AD patients.
Methods: This study enrolled 575 AD patients, 131 patients with non-AD dementia, and 112 cognitively normal (CN) participants, and AD patients were divided into APOE ε4 carriers and non-carriers. Cerebrospinal fluid (CSF) biomarkers and blood-derived biomolecules were compared between AD and CN groups, between non-AD dementia and CN groups, as well as within APOE ε4 subgroups of AD patients.
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