Uric acid-induced endothelial dysfunction is associated with mitochondrial alterations and decreased intracellular ATP concentrations.
Level 5 - mechanism / opinion, no new human data
Preclinical laboratory study using cultured human cells and a rat model
PubMed 23235493 · doi:10.1159/000345509
What was done
Researchers evaluated the effect of soluble uric acid on mitochondrial function in cultured human aortic endothelial cells by measuring oxidative stress, nitric oxide, mitochondrial density, ATP production, aconitase-2 and enoyl Co-A hydratase-1 expressions, and aconitase-2 activity in isolated mitochondria. They also assessed renal mitochondrial integrity (mitochondrial DNA damage, intrarenal uric acid, and oxidative stress) in rats with hyperuricemia induced by uricase inhibition.
What was found
The abstract reports no numerical values, concentrations, or statistical metrics. Qualitatively, uric acid exposure in endothelial cells was associated with reduced mitochondrial mass, decreased ATP production, reduced aconitase-2 activity, and lowered enoyl CoA hydratase-1 expression. In hyperuricemic rats, increased intrarenal uric acid and oxidative stress were associated with increased renal mitochondrial DNA damage.
Why it matters
This study provides mechanistic evidence that uric acid impairs endothelial function via mitochondrial alteration and ATP depletion, suggesting a biological pathway connecting hyperuricemia to vascular disease and hypertension.
Limits
Findings are limited entirely to in vitro cell culture and a rodent model, lacking direct human clinical data. The abstract provides no quantitative data, sample sizes, exposure doses or durations, or statistical confidence intervals.
Cited by
- supports Intracellular uric acid stimulates oxidative stress across virtually every cell type.
- supports Mitochondrial oxidative stress induced by uric acid inhibits aconitase in the Krebs cycle, stimulating citrate accumulation, fat production, and insulin resistance while blocking beta-oxidation of fatty acids.