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Immunoreactive renin concentrations in healthy children from birth to adolescence

C Krüger1, M Rauh, H G Dörr

  • 1Division of Endocrinology, Hospital for Children and Adolescents, University of Erlangen-Nürnberg, Erlangen, Germany.

Clinica Chimica Acta; International Journal of Clinical Chemistry
|July 29, 1998
PubMed

Insights

This study provides normative data for serum immunoreactive renin concentration in children aged 0-18 years. Renin levels are highest at birth and decrease significantly with age, offering valuable clinical reference ranges.

Area of Science:

  • Pediatric Endocrinology
  • Clinical Chemistry

Background:

  • Establishing reference ranges for serum immunoreactive renin concentration is crucial for diagnosing pediatric endocrine and renal disorders.
  • Previous data on renin levels in healthy children are limited, necessitating updated normative values.

Purpose of the Study:

  • To establish normative data for serum immunoreactive renin concentration in a cohort of healthy children aged 0 to 18 years.
  • To analyze age-related changes in renin levels from infancy through adolescence.

Main Methods:

  • Retrospective analysis of 281 surplus serum samples from healthy children aged 0-18 years.
  • Quantification of immunoreactive renin concentration using a commercially available two-site immunoradiometric assay.
  • Statistical analysis to determine geometric means and compare renin levels across different age groups and delivery methods.

Main Results:

  • Serum renin concentrations were significantly higher in umbilical cord blood and the first four days of life compared to older children.
  • A notable decline in renin levels was observed from the neonatal period through adolescence.
  • Infants born via Cesarean section exhibited significantly lower cord blood renin concentrations than those born vaginally.

Conclusions:

  • This study provides comprehensive normative data for serum immunoreactive renin concentration in healthy children, essential for clinical interpretation.
  • Age-specific reference ranges highlight the dynamic changes in the renin-angiotensin system during childhood development.
  • The findings support the utility of renin concentration assays as a valuable and accurate method for assessing renin levels in pediatric populations.

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