402468

Could Tear Fluid Urate Be a Predictor for Ocular Inflammation in Asymptomatic Hyperuricemia and Gout Patients?

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Last updated: 07 Jan 2025

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Abstract

Background: Uric acid is a result of purine metabolism. Hyperuricemia can be caused by either excessive urate production or inadequate elimination. Asymptomatic hyperuricemia is estimated to occur in up to 21% of the general population and 25% of hospitalized patients. Objectives: This study aimed to investigate the presence of pro-inflammatory cytokines and their relationship to uric acid level in the tear fluid of individuals with hyperuricemia and gout. Patients and methods: For this investigation, a total of 90 control volunteers, 80 patients with hyperuricemia, including 65 with asymptomatic hyperuricemia, and 15 participants with gout were enrolled. After stimulation, capillary action microcaps were used to collect each patient's tears for analysis. Chemiluminescence was used to gauge the amount of uric acid in the tears. Using an enzyme-linked immunosorbent test, serum & tear interleukin-1beta (IL-1β) as well as tumor necrosis factor alpha (TNF-α) levels were measured. Also, serum & tear urate levels correlation with TNF-α and IL-1β were determined. Results: In comparison to control group, the hyperuricemia group had significantly higher tear urate levels (0.72±0.17 mg/dl vs. 1.65±0.4 mg/dl, P<0.001) and considerably higher levels of IL-1β (210.0±51.9 pg/ml vs. 143.4±29.6 pg/ml, P<0.001). Tear urate and IL-1β levels were independently positively correlated, according to multiple linear regression analysis (B=0.191, P < 0.001). However, no meaningful relationships between serum or tear urate and TNFα-level were discovered. Furthermore, there were no statistically significant changes in the levels of IL-1β and TNFα in tears between the groups with asymptomatic hyperuricemia and gout. Conclusions: Patients who had gout and asymptomatic hyperuricemia had higher tear urate levels than controls. Tear uric acid levels had a substantial positive connection with IL-1β levels, suggesting an interaction between hyperuricemia and ocular inflammation.

DOI

10.21608/ejhm.2025.402468

Keywords

Gout, Hyperuricemia, Uric acid, Tears, Interleukin-1β, TNF-α, Inflammation

Volume

98

Article Issue

1

Related Issue

52551

Issue Date

2025-01-01

Receive Date

2025-01-02

Publish Date

2025-01-01

Page Start

175

Page End

181

Print ISSN

1687-2002

Online ISSN

2090-7125

Link

https://ejhm.journals.ekb.eg/article_402468.html

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http://journals.ekb.eg?_action=service&article_code=402468

Order

26

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Original Article

Type Code

606

Publication Type

Journal

Publication Title

The Egyptian Journal of Hospital Medicine

Publication Link

https://ejhm.journals.ekb.eg/

MainTitle

Could Tear Fluid Urate Be a Predictor for Ocular Inflammation in Asymptomatic Hyperuricemia and Gout Patients?

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Type

Article

Created At

07 Jan 2025