Intrauterine growth restriction is associated with persistent aortic wall thickening and glomerular proteinuria...

Area of Science:

• Perinatal Medicine
• Vascular Biology
• Pediatric Nephrology

Background:

• Low birth weight, resulting from preterm birth or intrauterine growth restriction (IUGR), is associated with adult renal and cardiovascular diseases.
• Aortic intima-media thickening serves as a noninvasive indicator of preclinical vascular disease.

Purpose of the Study:

• To compare abdominal aortic intima-media thickness in fetuses with IUGR versus those of appropriate gestational age.
• To assess the relationship between IUGR, fetal aortic thickening, and glomerular function in infancy.

Main Methods:

• 44 mothers with singleton pregnancies at 32 weeks gestation were enrolled (23 IUGR, 21 controls).
• Abdominal aortic intima-media thickness was measured via ultrasound in utero and at 18 months of age.
• Urinary microalbumin and albumin-creatinine ratio were measured at 18 months.

Main Results:

• Fetuses and infants with IUGR exhibited significantly thicker abdominal aortas compared to controls, both in utero and at 18 months.
• At 18 months, infants with IUGR showed significantly higher median urinary microalbumin and albumin-creatinine ratios.
• These findings indicate persistent aortic wall thickening and increased microalbuminuria in infants born with IUGR.

Conclusions:

• Intrauterine growth restriction is associated with persistent aortic wall thickening from fetal life into infancy.
• IUGR is linked to significantly higher microalbuminuria during infancy, suggesting impaired glomerular function.
• Early detection and monitoring of vascular and renal health in IUGR infants are crucial.