Insulin sensitivity in people born pre-term, with low or very low birth weight and small for gestational age

Area of Science:

• Pediatrics
• Endocrinology
• Developmental Biology

Background:

• Small for gestational age (SGA) children exhibit increased risks for adult obesity, type 2 diabetes mellitus, hypertension, coronary artery disease, and stroke.
• This heightened risk is associated with persistent early-life reduction in insulin sensitivity.
• Prematurity, like being born SGA at term, may also induce insulin resistance and similar long-term health consequences.

Purpose of the Study:

• To explore the parallels between term SGA and premature infants regarding insulin sensitivity and long-term health outcomes.
• To investigate the potential role of maternal factors and the intrauterine environment in influencing insulin sensitivity in these populations.
• To hypothesize that early neonatal interventions in premature infants could normalize insulin sensitivity.

Main Methods:

• Comparative analysis of existing evidence on term SGA and premature infants.
• Examination of the impact of intrauterine and early postnatal environments.
• Review of potential pathophysiological mechanisms linking early life factors to insulin sensitivity.

Main Results:

• Both term SGA and premature birth create abnormal early life environments (intrauterine and postnatal).
• Maternal factors and the intrauterine milieu, including nutrient supply, are crucial.
• Prematurity is hypothesized to lead to insulin resistance with potentially similar health consequences as being born SGA.

Conclusions:

• Prematurity may share similar long-term health risks with term SGA infants due to insulin resistance.
• Early manipulation of nutritional and environmental factors in premature neonates warrants investigation for potential normalization of insulin sensitivity.
• Further research is essential to elucidate the mechanisms of reduced insulin sensitivity and confirm the long-term health links in premature infants.