BACKGROUND: Adiponectin, one of the adipocytokines, is postulated to play a key role in fetal growth, probably enhancing the growth-promoting effect of insulin through insulin-sensitizing action. OBJECTIVES AND METHODS: To examine how different intrauterine or postnatal growth patterns relate to adiponectin secretion, we measured serum adiponectin concentrations in 30 appropriate-for-gestational-age (AGA) and 19 small-for-gestational-age (SGA) preterm infants on the first day of life and at term-equivalent age. RESULTS: The serum levels of adiponectin increased significantly in all preterm infants from birth to term-equivalent age. The adiponectin levels at term-equivalent age were significantly higher in the AGA than in the SGA group [mean (SD) 40.4 (12.3) vs. 28.4 (10.4) μg/ml; p < 0.01] after adjustment for gestational age or term-equivalent body weight. The increase in adiponectin levels from birth to term-equivalent age was significantly higher in the AGA than in the SGA group, and was positively correlated with the weight gain rate (g/kg/day) in the combined groups (r = 0.37, p < 0.01). A multiple regression analysis with the adiponectin increase from birth to term-equivalent age as the dependent variable for all the subjects revealed that only weight gain rate was independently associated with the adiponectin increase. CONCLUSIONS: Our results suggest that the change in serum adiponectin levels may reflect postnatal growth from birth to term-equivalent age in preterm infants.
BACKGROUND:Adiponectin, one of the adipocytokines, is postulated to play a key role in fetal growth, probably enhancing the growth-promoting effect of insulin through insulin-sensitizing action. OBJECTIVES AND METHODS: To examine how different intrauterine or postnatal growth patterns relate to adiponectin secretion, we measured serum adiponectin concentrations in 30 appropriate-for-gestational-age (AGA) and 19 small-for-gestational-age (SGA) preterm infants on the first day of life and at term-equivalent age. RESULTS: The serum levels of adiponectin increased significantly in all preterm infants from birth to term-equivalent age. The adiponectin levels at term-equivalent age were significantly higher in the AGA than in the SGA group [mean (SD) 40.4 (12.3) vs. 28.4 (10.4) μg/ml; p < 0.01] after adjustment for gestational age or term-equivalent body weight. The increase in adiponectin levels from birth to term-equivalent age was significantly higher in the AGA than in the SGA group, and was positively correlated with the weight gain rate (g/kg/day) in the combined groups (r = 0.37, p < 0.01). A multiple regression analysis with the adiponectin increase from birth to term-equivalent age as the dependent variable for all the subjects revealed that only weight gain rate was independently associated with the adiponectin increase. CONCLUSIONS: Our results suggest that the change in serum adiponectin levels may reflect postnatal growth from birth to term-equivalent age in preterm infants.
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