Short-term gestation, long-term risk: prematurity and chronic kidney disease

Area of Science:

• Neonatal Medicine
• Nephrology
• Developmental Biology

Background:

• Neonatal intensive care advances allow premature and low birth weight (LBW) infants to survive, but long-term kidney health consequences remain unclear.
• Premature and LBW infants often have fewer immature nephrons at birth and face developmental challenges.
• Potential insults include hemodynamic changes, nephrotoxic drugs, infections, and poor nutrition, which can impair kidney development or cause nephron loss.

Purpose of the Study:

• To review evidence linking premature birth and LBW to impaired nephrogenesis and increased risk of chronic kidney disease (CKD).
• To discuss the theoretical basis (Brenner's hypothesis) and experimental/observational data supporting this risk.
• To highlight the lack of established screening and management guidelines for CKD in this population.

Main Methods:

• Review of existing scientific literature, including theoretical frameworks, experimental studies, and observational data.
• Analysis of factors affecting nephrogenesis and nephron number in premature and LBW infants.
• Examination of the relationship between acute kidney injury and long-term CKD risk.

Main Results:

• Premature and LBW infants may start with reduced nephron counts and are susceptible to further nephron loss.
• Acute kidney injury is identified as a potential significant risk factor for developing CKD.
• Brenner's hypothesis suggests reduced nephron number leads to hyperfiltration, hypertension, and progressive kidney damage.

Conclusions:

• There is a theoretical and evidence-based concern for an increased risk of CKD in individuals born prematurely or with LBW.
• The precise prevalence of CKD in this population is unknown, necessitating further investigation.
• Individualized, risk-based assessments are recommended for premature and LBW infants to monitor for potential long-term kidney issues.