Xanthine Oxidoreductase Is an Endogenous Regulator of Cyclooxygenase-2
Open accessAbstract
Xanthine oxidoreductase (XOR) is the enzyme responsible for the final step in purine degradation resulting in the generation of uric acid. Here we have generated mice deficient in XOR. As expected, these animals lack tissue XOR activity and have low to undetectable serum levels of uric acid. Although normal at birth, XOR−/− mice fail to thrive after 10 to 14 days, and most die within the first month. The cause of death appears to be a form of severe renal dysplasia, a phenotype that closely resembles what has been observed previously in cyclooxygenase-2 (COX-2)–deficient mice. We further demonstrate that in the first month of life, a period in which the mouse kidney is undergoing rapid maturation and remodeling, wild-type mice exhibit an ≈30-fold increase in renal XOR activity, with a corresponding induction of COX-2 expression. In contrast, during this same period, XOR−/− animals fail to augment renal COX-2 expression. Finally, we show that in vitro and in vivo, uric acid can stimulate basal COX-2 expression. These results demonstrate that XOR activity is an endogenous physiological regulator of COX-2 expression and thereby provide insight into previous epidemiological evidence linking elevated serum uric levels with systemic hypertension and increased mortality from cardiovascular diseases. In addition, these results suggest a novel molecular link between cellular injury and the inflammatory response.
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Excess superoxide or other ROS in the cell causes modification of different parts of the cellular machinery and is a known player in the genesis and progression of cardiovascular disease.
“The excess of superoxide, or other ROS, in the cell causes the modification of different parts of the cellular machinery and is a known player in the genesis and progression of cardiovascular disease (227, 408, 409, 570, 672, 700, 893).”
From Sources of Vascular Nitric Oxide and Reactive Oxygen Species and Their Regulation (2019) · cites this paper as [700]
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- Authors
- Ohtsubo, T., Rovira, I. I., Starost, M. F., Liu, C., & Finkel, T.
- Affiliations
- National Institutes of Health (US)
- Venue
- Circulation Research
- Published
- 2004-11-26
- Volume
- 95
- Issue
- 11
- Pages
- 1118-1124
- ISSN
- 0009-7330 (ISSN-L)
- 1524-4571
- OpenAlex
- W2148113831
- Cited by
- 99
- References
- 43
- Citations by year
- 2026: 4 · 2025: 3 · 2024: 4 · 2023: 3 · 2022: 5 · 2021: 5 · 2020: 4 · 2019: 6 · 2018: 4 · 2017: 6 · 2016: 5 · 2015: 7 · 2014: 9 · 2013: 6 · 2012: 3
- FWCI
- 2.00
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Circulation Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health
- Topics
- Health Sciences › Medicine › Nephrology › Gout, Hyperuricemia, Uric Acid
- Health Sciences › Medicine › Pharmacology › Inflammatory mediators and NSAID effects
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Molecular Research
- Keywords
- xanthine oxidoreductase, cyclooxygenase-2, uric acid, purine degradation, renal dysplasia, kidney maturation, cardiovascular mortality, inflammation
- MeSH terms
- Animals, Blood Urea Nitrogen, Enzyme Induction, Female, Genes, Lethal, Hypertension, Inflammation, Kidney, Kidney Diseases, Male, Phenotype, Prostaglandin-Endoperoxide Synthases, Uric Acid, Xanthine Oxidase, Mice, Knockout, Disease Progression, Genetic Heterogeneity, NIH 3T3 Cells, Mice, Cyclooxygenase 2
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