Large-for-Gestational-Age, Leptin, and Adiponectin in Infancy

Area of Science:

• Endocrinology
• Metabolic Health
• Pediatric Growth

Background:

• Fetal overgrowth, indicated by large-for-gestational-age (LGA) status, is linked to increased adult obesity and type 2 diabetes risk.
• Adipokines, such as leptin and adiponectin, are crucial in regulating metabolic health and may play a role in this programming.

Purpose of the Study:

• To investigate if LGA is associated with different infant circulating leptin and adiponectin levels.
• To identify determinants of these adipokine levels in relation to LGA status.

Main Methods:

• A Canadian birth cohort study compared 70 LGA infants with 140 optimal-for-gestational-age (OGA) infants.
• Infants were matched for maternal ethnicity, smoking, and gestational age.
• Fasting leptin, total adiponectin, and high-molecular-weight (HMW) adiponectin were measured at age 2 years.

Main Results:

• LGA infants had higher body mass index (BMI) but no significant differences in leptin or adiponectin levels compared to OGA infants.
• Leptin levels correlated with sex, weight gain, BMI, and skinfold thickness.
• Adiponectin levels were associated with sex and, in LGA infants only, with weight gain and BMI.

Conclusions:

• LGA status itself does not alter infant leptin and adiponectin concentrations.
• Positive associations between weight gain/BMI and adiponectin in LGA infants suggest potential dysfunction in the adiposity-adiponectin feedback loop.