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Growth hormone stimulation tests in chronic renal failure with metabolic acidosis
Z Bircan1, M Kervancioğlu, M Soran
1Department of Pediatrics, Dicle University School of Medicine, Diyarbakir, Turkey.
Insights
Metabolic acidosis in chronic renal failure (CRF) does not significantly impact growth hormone (GH) secretion. Studies show no difference in GH stimulation tests between CRF patients with acidosis and healthy children, even after treatment.
Area of Science:
- Pediatric Nephrology
- Endocrinology
- Metabolic Disorders
Background:
- Metabolic acidosis is a known complication of chronic renal failure (CRF) and a potential cause of growth retardation.
- Limited data exists on the specific impact of metabolic acidosis on growth hormone (GH) secretion in pediatric CRF patients.
Purpose of the Study:
- To investigate the effect of metabolic acidosis on growth hormone (GH) secretion in children with chronic renal failure (CRF).
- To compare GH stimulation test results in CRF patients with severe metabolic acidosis versus healthy children.
Main Methods:
- Eight prepubertal children with CRF and severe metabolic acidosis were studied.
- Eight age-matched healthy short children served as controls.
- Growth hormone (GH) stimulation tests using L-dopa and clonidine were performed before and after acidosis correction in CRF patients.
- GH levels were measured via radio-immunoassay; statistical analysis used Mann-Whitney U and Wilcoxon tests.
Main Results:
- No statistically significant difference was observed in peak GH levels between the CRF group and the control group.
- This finding held true both during the period of metabolic acidosis and after its correction.
- Statistical tests (Wilcoxon) showed P > 0.05, indicating no significant change.
Conclusions:
- Metabolic acidosis appears to have minimal impact on the results of standard growth hormone (GH) stimulation tests in pediatric patients with chronic renal failure (CRF).
- Further research may be warranted to explore other potential factors influencing growth in this population.
Abstract:
Metabolic acidosis is one of the possible causes of growth retardation in chronic renal failure (CRF). Data about the effect of metabolic acidosis on growth hormone (GH) secretion in CRF are limited. A study was carried out on eight CRF patients, hospitalized because of severe metabolic acidosis, and eight age-matched prepubertal healthy short children. Growth hormone stimulation tests were done with L-dopa and clonidine before or during acidosis therapy and after the correction of metabolic acidosis. The levels of GH were measured by radio-immunoassay. The mean of the peaks of both tests were used for each patient and statistical significance was tested by Mann-Whitney U and Wilcoxon tests. No difference was found between the GH peaks of the two groups during acidosis and after the correction of acidosis (Wilcoxon test, P > 0.05). In view of this data it was concluded that metabolic acidosis has little effect on GH stimulation tests.