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Circulating resistin concentrations in children depend on renal function
Kai-Dietrich Nüsken1, Jürgen Kratzsch, Veronica Wienholz
1Klinik für Kinder und Jugendliche, University of Erlangen-Nürnberg, Erlangen, Germany.
Insights
Serum resistin levels increase in children with declining renal function, particularly in end-stage renal disease patients undergoing haemodialysis. Age may also influence these elevated resistin concentrations in pediatric renal impairment.
Area of Science:
- Pediatric Endocrinology
- Nephrology
- Metabolic Research
Background:
- Resistin is a peptide hormone implicated in adipogenesis, insulin resistance, and inflammation.
- The precise physiological role of resistin in humans remains largely undefined.
- Investigating resistin's regulation by renal function in children is crucial for understanding its role in pediatric health.
Purpose of the Study:
- To investigate the relationship between serum resistin concentrations and renal function in children.
- To determine if renal impairment influences resistin levels in a pediatric cohort.
Main Methods:
- Serum resistin concentrations were measured using ELISA in 15 pediatric patients with end-stage renal disease on haemodialysis (HD), 11 with chronic renal failure (CRF), and 23 healthy children.
- Glomerular filtration rate (GFR), body mass index (BMI), and age were recorded for all participants.
- Leptin levels were measured by RIA for comparative analysis.
Main Results:
- Resistin concentrations were significantly elevated in children with HD and CRF compared to healthy controls (P<0.0001).
- A trend towards higher resistin levels was observed in the youngest and oldest age groups.
- Serum resistin levels did not correlate with gender or BMI, and haemodialysis did not significantly reduce resistin concentrations.
Conclusions:
- Serum resistin concentration is elevated in children with decreased renal function.
- Age may be a potential factor influencing circulating resistin levels in pediatric populations.
- Further research is needed to explore the link between elevated resistin, malnutrition, and reduced BMI in children with renal disease.
Background:
Resistin is a newly discovered peptide hormone that inhibits adipogenesis. Furthermore, it may be involved in regulative processes taking place in insulin resistance and inflammation. In human beings as well as in rodents, the exact physiological role of resistin is unknown. The objective of this study was to examine whether resistin serum concentrations in childhood are regulated by renal function.
Methods:
Fifteen patients with end stage renal disease treated by haemodialysis (HD) (6m, 9f; age (median (25-75% percentile)) 16.1 (14.2-16.9) years; body mass index (BMI) 17.8 (17.6-20.6) kg/m2; glomerular filtration rate (GFR)<10 ml/min/1.73 m2), 11 patients with chronic renal failure (CRF) (4m, 7f; age 11.3 (9.2-16.9) years; BMI 17.9 (15.4-22.1) kg/m2; GFR 21.2 (19.8-39.4) ml/min/1.73 m2) and 23 healthy children (13m, 10f; age 7.8 (4.7-14.5) years; BMI 16.5 (14.9-18.1) kg/m2; GFR 168.5 (154.0-197.2) ml/min/1.73 m2) were included. Resistin concentration in serum was measured by ELISA, leptin by RIA.
Results:
Resistin concentrations were significantly elevated in HD (6.6 (5.7-8.7) ng/ml) and CRF (4.8 (4.1-6.2) ng/ml) compared to healthy controls [2.7 (2.0-3.6) ng/ml; P<0.0001 by multiple regression analysis]. Furthermore, resistin concentrations showed a tendency to be higher in children below the age of 5.5 years (youngest tertile) and above 12.5 years of age (oldest tertile), compared to children aged between 5.5 and 12.5 years (P=0.053 and P=0.043, respectively). Gender (P=0.686) and BMI (P =0.663) did not have a significant influence on resistin concentrations. Resistin and leptin serum concentrations correlated in HD patients only (r=0.62, P=0.013 by Spearman correlation). Haemodialysis did not eliminate resistin.
Conclusions:
With decreasing renal function, resistin concentration in serum increases in our small paediatric cohort. Age possibly influences circulating resistin concentration. The hypothesis that elevated serum resistin in children with chronic renal failure or end stage renal disease may add to malnutrition and reduced BMI needs further investigation and is not supported by our data.
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