Investigation on the IGF-1 and lipid level in term small for gestational age infants within 24 hours postnatally / 中国新生儿科杂志

ABSTRACT

Objective:To study the insulin-like growth factors-1 (IGF-1) and lipid level of term small for gestational age (SGA) infants within 24 hours postnatally and to explore the correlation between IGF-1 and blood lipids.Methods:A prospective study was conducted on singleton term SGA and appropriate for gestational age infant (AGA) who were delivered and admitted to the neonatal ward of Guangdong Women and Children Hospital within 24 hours after birth from May 2020 to January 2021, and the infants were divided into SGA and AGA groups to compare the differences in IGF-1 and lipid levels within 24 hours after birth and to analyze the correlation between IGF-1 and lipids.Results:A total of 95 cases in the SGA group and 84 cases in the AGA group were included in the study. The proportion of infants with IGF-1 <25 ng/ml was significantly higher in SGA group (87.4%) than in the AGA group (52.4%). It was also found that the proportion of infants with IGF-1 <25 ng/ml in SGA was significantly higher than that in AGA within different gender composition groups, early-term and full-term births groups. The triglyceride (TG) level was higher in the SGA group than that in the AGA group, but the high-density lipoprotein cholesterol (HDL-C) level was lower than that in the AGA group ( P<0.05). IGF-1 level within 24 hours postnatally in SGA and AGA was positively correlated with HDL-C levels ( P<0.01) and negatively correlated with TG ( P<0.01), and HDL-C level was a predictor of IGF-1. Conclusions:Compared with term AGA, SGA term infants showed insufficient IGF-1 and HDL-C secretion and high TG within 24 hours after birth. Nutritional support for SGA should be given promptly after birth to avoid hypoglycemia and to stimulate IGF-1 secretion.