Microalbuminuria in pediatric obesity: prevalence and relation to other cardiovascular risk factors

Area of Science:

• Pediatric Endocrinology
• Cardiovascular Risk Assessment
• Metabolic Syndrome Research

Background:

• Microalbuminuria (MA) is a significant predictor of cardiovascular (CV) events in adults.
• MA is often associated with endothelial dysfunction and early vasculopathy.
• The link between MA and CV risk in non-diabetic youth requires further investigation.

Purpose of the Study:

• To investigate the relationship between microalbuminuria (MA) and metabolic markers of cardiovascular (CV) risk in obese, pre-diabetic youth.
• To assess if urine albumin-to-creatinine ratio (UACR) in the microalbuminuric range correlates with CV risk factors in this specific demographic.

Main Methods:

• MA was defined as a UACR between 2.0 and 20 mg/mmol; subjects with gross proteinuria were excluded.
• Evaluated associations between MA and markers including BMI, body fat percentage, blood pressure, lipid profiles, inflammatory markers, insulin sensitivity, and oral glucose tolerance.
• Correlated MA with metabolic syndrome risk factors.

Main Results:

• Postchallenge glucose metabolism alterations and reduced insulin sensitivity were significantly correlated with the presence of MA (P = 0.002 and 0.01, respectively).
• No significant association was found between MA and the metabolic syndrome or its individual risk factors.
• These findings highlight early glucose dysregulation as a key factor associated with MA in this cohort.

Conclusions:

• Early glucose toxicity, indicated by elevated postchallenge plasma glucose below diabetes diagnostic thresholds, may contribute to microalbuminuria (MA) in obese, pre-diabetic youth.
• The predictive value of MA for future cardiovascular disease in youth, similar to its role in adults, warrants further research.
• These results underscore the importance of monitoring MA in at-risk pediatric populations.