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OBJECTIVE: This study aimed to develop a curve of weekly serum levels of adiponectin and leptin among pregnant adolescents. In addition, pregestational body mass index and weight gain were assessed and correlated with the serum concentration of these molecules. METHODS: This was a prospective cohort study, including only pregnant adolescents with eutrophic pre-gestational body mass index who were weekly followed during the evolution of gestation. The serum concentrations of adipokines were determined using commercial ELISA kits and were correlated to pre-gestational body mass index and pregnancy weight gain. A total of 157 pregnant women participated in this study. RESULTS: Adiponectin levels showed a significant decrease among the trimesters (p=0.0004). However, we did not observe significant differences among its levels when compared weekly, neither of which was between adiponectin concentration and pre-gestational body mass index or weight gain (p=0.36 and p=0.10, respectively). In contrast, we detected a significant increase in weekly serum leptin levels (p<0.0001), positively correlated to both pre-gestational body mass index and weight gain (p=0.003 and p=0.0007, respectively). CONCLUSION: These adipokines present a different profile throughout adolescent pregnancy.
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Leptina , Gravidez na Adolescência , Gravidez , Adolescente , Feminino , Humanos , Adiponectina , Estudos Prospectivos , AdipocinasRESUMO
SUMMARY OBJECTIVE: This study aimed to develop a curve of weekly serum levels of adiponectin and leptin among pregnant adolescents. In addition, pregestational body mass index and weight gain were assessed and correlated with the serum concentration of these molecules. METHODS: This was a prospective cohort study, including only pregnant adolescents with eutrophic pre-gestational body mass index who were weekly followed during the evolution of gestation. The serum concentrations of adipokines were determined using commercial ELISA kits and were correlated to pre-gestational body mass index and pregnancy weight gain. A total of 157 pregnant women participated in this study. RESULTS: Adiponectin levels showed a significant decrease among the trimesters (p=0.0004). However, we did not observe significant differences among its levels when compared weekly, neither of which was between adiponectin concentration and pre-gestational body mass index or weight gain (p=0.36 and p=0.10, respectively). In contrast, we detected a significant increase in weekly serum leptin levels (p<0.0001), positively correlated to both pre-gestational body mass index and weight gain (p=0.003 and p=0.0007, respectively). CONCLUSION: These adipokines present a different profile throughout adolescent pregnancy.
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INTRODUCTION: Adiponectin and leptin play a critical role in pregnancy development, the blood levels of these adipokines have been extensively investigated in healthy adult women, however there are no similar studies in adolescents. The aim of this study was to evaluate adiponectin and leptin serum levels in adolescents during pregnancy. METHODS: This prospective cohort study recruited 105 healthy, normal-weight adolescents, within the ages from 13 to 19 years old. Leptin and adiponectin serum levels of the 43 pregnant participants were assessed at 10-14, 24-28 and 30-34 weeks and their concentrations were compared with those of the 62 nonpregnant adolescents. Commercial ELISA kits were used for all assessments. RESULTS: There were no clinical and sociodemographic differences between the pregnant and nonpregnant adolescents. Adiponectin serum levels were significantly lower in the pregnant compared to the nonpregnant adolescents 3600 ± 1730 ng/ml versus 4144 ± 1583 ng/ml, respectively. (p < .0001). Moreover, adiponectin concentration decreased significantly with pregnancy progress: being 4295 (± 2003) ng/ml at the first trimester; 3419 (±1803) ng/ml at the 2nd; and 3112 (±1442) ng/ml at the 3rd trimesters, respectively (p = .004). Overall leptin serum concentrations were significantly higher in pregnant than in nonpregnant adolescents (p < .0001). During pregnancy, leptin concentration increased significantly between the first and third trimesters: 35,688 (±33,637) pg/ml versus 49,388 (±33,186) pg/ml, respectively, (p < .0001). CONCLUSIONS: The profile of adiponectin and leptin serum levels in adolescent are similar to that observed in adult women. In both cases, there are significant changes with gestational age during healthy pregnancy.Key MessageAdiponectin and leptin serum levels in healthy teenager changes with pregnancy.
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Adiponectina , Gravidez na Adolescência , Adipocinas , Adolescente , Adulto , Feminino , Humanos , Leptina , Gravidez , Estudos Prospectivos , Adulto JovemRESUMO
OBJECTIVE: To evaluate the serum levels of adiponectin and leptin and their relationship with nutritional variables during pregnancy in adolescents. METHODS: This prospective cohort study evaluated eutrophic pregnant adolescents (body mass index [BMI], 18.5-24.9 kg/m2) during the 3 gestational trimesters (first, 10-14 weeks; second, 24-28 weeks; and third, 30-34 weeks). Serum adiponectin and leptin concentrations were measured using the enzyme-linked immunosorbent assay method. The relationship of these adipokines with the pre-gestational BMI, gestational weight gain, weight at the time of sample collection, and newborn weight were evaluated. Analysis of variance and the Kruskal-Wallis test were used for statistical analysis. RESULTS: The study group comprised 62 pregnant adolescents. The serum concentration of adiponectin showed a significant difference between the first and third trimesters (P=0.003), which decreased during pregnancy, but unrelated to nutritional variables. Serum leptin levels increased throughout the pregnancy (P<0.0001) and showed a positive correlation with pre-gestational BMI, total weight gain, pregnancy weight at the time of sample collection, and newborns' weight. CONCLUSION: Serum levels of adiponectin and leptin vary inversely throughout pregnancy. This pattern in adolescents is similar to that observed in adults. Moreover, leptin concentrations increased throughout pregnancy, and they were positively correlated with all variables evaluated.