Evolution of the urinary proteome during human renal development and maturation

Area of Science:

• Pediatric Nephrology
• Proteomics
• Developmental Biology

Background:

• Human renal development involves three stages: pronephros, mesonephros, and metanephros, with postnatal tubule maturation continuing for 1-2 years.
• Research on the urinary proteome during human renal development is scarce, with most studies focusing on the postnatal period.

Purpose of the Study:

• To investigate the urinary proteome during human renal development, particularly in infants.
• To identify differences in urinary protein patterns between preterm and full-term infants.
• To explore potential biomarkers for congenital kidney and urinary tract anomalies.

Main Methods:

• Comparative analysis of urinary proteome patterns between full-term infants and adults.
• Analysis of urinary proteome in preterm infants compared to term infants.
• Examination of urinary proteome in patients with congenital kidney and urinary tract anomalies.

Main Results:

• A comparison between full-term infants and adults revealed 648 infant-enriched protein spots, primarily involved in cellular turnover and metabolism.
• Preterm infants showed elevated levels of IGFBP-1, IGFBP-2, IGFBP-6, monocyte chemotactic protein-1, CD14, and sialic acid-binding Ig-like lectin 5 compared to term infants.
• Novel biomarkers were identified in conditions like ureteropelvic junction obstruction and autosomal dominant polycystic kidney disease.

Conclusions:

• The urinary proteome differs significantly between infants and adults, with specific proteins altered in preterm infants during nephrogenesis.
• Urinary proteomic analysis holds promise for discovering biomarkers in congenital kidney diseases.
• Further research into urinary proteome evolution during renal maturation is crucial for identifying pediatric renal disease biomarkers.