Xanthine oxidoreductase has been demonstrated in the heart of various species. However, its presence in human heart is still debated. In the literature, high to undetectable levels have been reported. We studied the arterial-venous urate difference across the heart of patients undergoing both routine cardiac catheterization and percutaneous transluminal coronary angioplasty. Urate is the end product of the reaction catalysed by xanthine oxidoreductase. In 10 patients, studied before angioplasty, the plasma urate level in the great cardiac vein exceeded the arterial one by 26 +/- 10 nmol/ml (P = 0.028). In a further 13 patients, urate production was maximal immediately after the last of four consecutive occlusions (23 +/- 8 nmol/ml, P = 0.018) and concomitant with increased coronary sinus hypoxanthine levels. We conclude that xanthine oxidoreductase is probably present in the heart of patients, suffering from ischemic heart disease, and responsible for the increase in urate production during transient myocardial ischemia.

Additional Metadata
Keywords 69-93-2 (Uric Acid), Aged, Coronary Disease/*metabolism, EC (Xanthine Dehydrogenase), EC 1.2. (Ketone Oxidoreductases), Female, Human, Ketone Oxidoreductases/*metabolism, Male, Middle Aged, Myocardium/*metabolism, Uric Acid/*blood, Xanthine Dehydrogenase/*metabolism
Persistent URL hdl.handle.net/1765/4332
Journal Journal of Molecular and Cellular Cardiology
Huizer, T, de Jong, J.W, Nelson, J.A, Czarnecki, W, Serruys, P.W.J.C, Bonnier, J.J.R.M, & Troquay, R. (1989). Urate production by human heart. Journal of Molecular and Cellular Cardiology, 21, 691–695. Retrieved from http://hdl.handle.net/1765/4332