Characterizing Patients with Recurrent Urinary Tract Infections in Vesicoureteral Reflux: A Pilot Study of the...

Area of Science:

• Biochemistry
• Pediatric Nephrology
• Proteomics

Background:

• Recurrent urinary tract infections (UTIs) are a significant health concern, particularly in children.
• The underlying mechanisms and urinary proteome changes in children predisposed to UTIs, especially those with vesicoureteral reflux (VUR), are not fully understood.
• Identifying UTI risk factors is crucial for managing VUR and preventing infection-related renal damage.

Purpose of the Study:

• To investigate the urinary proteome differences in children with VUR and recurrent UTIs.
• To identify specific urinary proteins associated with risk factors for UTIs and renal scarring in pediatric VUR patients.

Main Methods:

• Urinary proteomes of 22 children with low-grade VUR, recurrent UTIs, and renal scarring were compared to 22 age-matched controls.
• Mass spectrometry was used for urinary protein analysis, with quantitation based on spectral counting.
• Differential protein expression was assessed using statistical analysis (q <0.075, FC ≥1.2).

Main Results:

• A total of 2,551 proteins were identified, with 964 robustly quantified.
• Eighty proteins showed differential expression between the VUR and control groups (44 up-regulated, 36 down-regulated).
• Altered urinary proteins were associated with inflammation, acute phase response (APR), extracellular matrix (ECM) modulation, and carbohydrate metabolism.

Conclusions:

• The urinary proteome is significantly altered in children with VUR and recurrent UTIs.
• Specific protein alterations may serve as biomarkers for UTI risk and potential renal damage in this population.
• Further research into these proteomic changes could improve diagnostic tools and clinical management strategies for pediatric VUR.