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Glomerular basement membrane and lamina densa in infants and children: an ultrastructural evaluation
C Vogler1, A J McAdams, S M Homan
1Department of Pathology and Laboratory Medicine, Cardinal Glennon Children's Hospital, St. Louis University, Missouri 63104.
Insights
The glomerular basement membrane (GBM) and lamina densa grow rapidly in width during the first two years of life. This growth continues at a slower pace throughout childhood, impacting kidney development.
Area of Science:
- Nephrology
- Pediatric Pathology
- Developmental Biology
Background:
- The glomerular basement membrane (GBM) and lamina densa are critical components of the kidney glomerulus.
- These structures exhibit age-related changes in composition and thickness.
- Understanding these changes is vital for diagnosing pediatric kidney diseases.
Purpose of the Study:
- To investigate the ultrastructural morphology of the GBM and lamina densa in infants and children.
- To characterize the developmental trajectory of GBM and lamina densa width from birth through childhood.
Main Methods:
- Ultrastructural analysis of kidney tissue.
- Morphometric measurements of the GBM and lamina densa.
- Study cohort included 37 children aged 1 day to 11 years without renal disease.
Main Results:
- A rapid increase in GBM and lamina densa width was observed during the first two years of life.
- Slower, continuous growth of these structures was noted in later childhood.
- These findings provide a normative reference for developing kidney structures.
Conclusions:
- The GBM and lamina densa undergo significant, age-dependent structural development in early life.
- The initial rapid growth phase is followed by sustained, slower development throughout childhood.
- These developmental patterns are crucial for normal kidney function and understanding disease pathogenesis.
Abstract:
The glomerular basement membrane and lamina densa are complex structures that change in composition and thickness with age. We studied their ultrastructural morphology in 37 infants and children, from 1 day to 11 years of age, who died without clinical or morphological evidence of renal disease. The glomerular basement membrane and its lamina densa rapidly increase in width during the first 2 years of life, followed by continued, albeit slower, growth during later childhood.