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[Renal function of cations excretion in children predisposed to essential hypertension]
1Department of Child and Adolescent Health, School of Public Health, Tongji Medical University, Wuhan.
Insights
Children with a family history of essential hypertension show lower urinary sodium excretion after salt loading, suggesting a potential hereditary defect. This may precede the development of hypertension.
Area of Science:
- Pediatric Nephrology
- Hypertension Research
- Mineral Metabolism
Context:
- Essential hypertension is a growing concern in pediatric populations.
- Early identification of risk factors is crucial for preventative strategies.
- Renal cation excretion plays a role in blood pressure regulation.
Purpose:
- To investigate differences in renal cation excretion between children with and without a family history of essential hypertension.
- To assess the impact of acute oral salt loading on urinary excretion of key cations in children.
- To identify potential early markers for hypertension risk in children.
Summary:
- This study analyzed 24-hour urinary excretion of sodium, potassium, calcium, magnesium, copper, and zinc in 86 children (aged 4-6) before and after salt loading.
- Children with a family history of essential hypertension exhibited significantly lower urinary sodium excretion post-salt loading compared to controls (P < 0.01).
- Differences in renal excretion of potassium and zinc were also observed between the groups, suggesting broader impacts on mineral balance.
Impact:
- Findings suggest a potential hereditary functional defect in sodium excretion in children with a family history of hypertension.
- This research may aid in developing early screening methods for hypertension risk in pediatric populations.
- Highlights the importance of studying cation metabolism in the context of inherited predisposition to hypertension.
Abstract:
We studied the renal function of cations excretion in 86 normal children, aged 4-6 years old. 24-hour urinary excretion of sodium, potassium, calcium, magnesium, copper and zinc were measured before and after acute oral salt loading. The result showed that urinary sodium levels were significantly lower (101.88 mmol/24 h, 126.58 mmol/24 h, respectively, P less than 0.01) in children with family history of essential hypertension than in those without family history after salt loading. This suggests that the children with family history may have hereditary functional defect in the excretion of sodium before developing hypertension. We also found the renal excretions of potassium, calcium and zinc showed difference between children with and without family history of essential hypertension.