Article

Renalase, a catecholamine-metabolizing hormone from the kidney.

Medical Faculty of the Charite, Franz Volhard Clinic, HELIOS Klinikum-Berlin, Max Delbruck Center for Molecular Medicine, Berlin, Germany.
Cell Metabolism (Impact Factor: 14.62). 07/2005; 1(6):358-60. DOI: 10.1016/j.cmet.2005.05.008
Source: PubMed

ABSTRACT A novel flavin adenine dinucleotide-dependent amine oxidase that is secreted by the kidney, circulates in the blood, and modulates cardiac function and systemic blood pressure has recently been discovered. Renalase appears to be a hormone that metabolizes catecholamines, and its discovery will facilitate our understanding of sympathetic regulation.

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    ABSTRACT: BACKGROUND: Renalase is a novel flavin adenine dinucleotide-dependent amine oxidase that is secreted by the kidney. It circulates in the blood and modulates the cardiac function and systemic blood pressure. Insufficiency of renalase in patients with chronic kidney disease may explain the frequent occurrence of hypertension among patients with end-stage renal disease (ESRD) and an increased risk of cardiovascular events in this group. The aim of the study was to assess the relationship of two renalase gene polymorphisms with hypertension in dialysed patients. METHODS: Rs2576178 polymorphism was genotyped in 369 patients, rs10887800 polymorphism was genotyped in 421 dialysed patients, using polymerase chain reaction (PCR) and subsequent cleavage with Msp I and Pst I restriction endonucleases. RESULTS: Genotype distribution and allele frequencies of rs2576178 polymorphism were compared in the following subgroups of patients: dialysed patients with hypertension: ESRD HY+ (n = 200) and dialysed patients without hypertension: ESRD HY- (n = 169). There was a significant difference in the frequency of the G allele carriers. G allele carriers were associated with a 1.55 times higher risk of hypertension [odds ratio (OR) = 1.55; 95% confidence interval (CI): 1.023-2.357, P = 0.039]. Distribution of genotypes and frequencies of alleles of rs10887800 polymorphism were compared in the following subgroups of patients: ESRD HY+ (n = 278) and ESRD HY- (n = 143). The G allele carriers were recognized with a significantly higher frequency in ESRD HY+ patients (0.46 in ESRD HY+ versus 0.37 in ESRD HY-) [OR = 1.76; 95% CI: (1.159-2.667, P = 0.008)]. CONCLUSIONS: Our results are the first to suggest an association between renalase gene polymorphisms analysed and hypertension in dialysed patients. It may be an important step towards gaining a deeper insight into cardiovascular pathophysiology. Furthermore, it might provide an optimal treatment and better prognosis for patients with chronic kidney disease.
    Nephrology Dialysis Transplantation 05/2011; · 3.37 Impact Factor
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