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Abnormal gonadothrophin secretion in children with chronic renal failure
Insights
Children with chronic kidney disease show abnormal responses to gonadotropin-releasing hormone (GnRH), indicating potential hypothalamus and pituitary involvement. Further research is needed to understand the impact on growth and puberty.
Area of Science:
- Pediatric Endocrinology
- Nephrology
- Reproductive Medicine
Background:
- Chronic renal failure (CRF) can affect endocrine functions, including the hypothalamic-pituitary-gonadal axis.
- Growth retardation and pubertal delay are common complications in children with CRF.
- The specific impact of CRF on gonadotropin secretion and response to gonadotropin-releasing hormone (GnRH) requires further elucidation.
Purpose of the Study:
- To evaluate the luteinizing hormone (LH) and follicle-stimulating hormone (FSH) response to GnRH in children with CRF.
- To assess the hypothalamic-pituitary function in children undergoing intermittent hemodialysis for CRF.
- To compare these responses with those in children who have undergone successful renal transplantation.
Main Methods:
- Intravenous injection of GnRH was administered to patients with CRF and a control group.
- Plasma levels of LH and FSH were measured before and after GnRH administration.
- Patients included children with CRF on intermittent hemodialysis and children with successful renal transplants.
Main Results:
- Basal plasma LH levels were elevated in children with CRF compared to controls.
- GnRH injection caused a significant increase in LH in most children with CRF.
- Basal plasma FSH levels were higher than in controls, with a slight increase after GnRH.
Conclusions:
- Children with chronic renal failure exhibit an abnormal response to GnRH, suggesting hypothalamic and pituitary involvement.
- Abnormalities in gonadotropin secretion may contribute to growth retardation and pubertal delay in these children.
- Renal transplantation may normalize these responses, though further investigation is warranted.
Abstract:
LH and FSH response to intravenous injection of GnRH was evaluated in a group of patients with chronic renal failure on intermittent haemodialysis and in two children with successful renal transplant. Basal plasma LH was elevated in children with chronic renal failure as compared to control, and significantly increased following GnRH injection in most of the children. Basal plasma FSH was higher than in the control group, and slightly increased after GnRH. These data suggest an abnormal response to GnRH in chronic renal failure and an involvement of hypothalamus and pituitary in chronic renal disease. The role of abnormal gonadotrophin secretion in growth retardation and pubertal delay of these children is still not well understood.