Related Experiment Videos
Leptin levels in children with central precocious puberty
M R Palmert1, S Radovick, P A Boepple
1Department of Medicine, Children's Hospital, Boston, Massachusetts 02115, USA.
Insights
This study found that girls with central precocious puberty (CPP) have higher serum leptin levels. These findings suggest leptin may play a role in initiating puberty in girls.
Area of Science:
- Pediatric Endocrinology
- Reproductive Biology
- Hormone Research
Background:
- Leptin, a hormone produced by adipocytes, is thought to influence reproductive function.
- Previous research suggests a link between adequate serum leptin levels and the initiation of puberty.
- Central precocious puberty (CPP) presents an opportunity to investigate leptin's role in pubertal onset.
Purpose of the Study:
- To investigate the relationship between serum leptin concentrations and the onset of puberty in children with central precocious puberty (CPP).
- To compare leptin levels in children with CPP to normative data from healthy peers, adjusting for body mass index (BMI) and Tanner stage.
Main Methods:
- Serum leptin concentrations were measured in 65 children (58 girls, 8 boys) diagnosed with idiopathic or neurogenic CPP.
- Leptin levels were compared to normative data using standard deviation (SD) scores, adjusted for BMI and Tanner stage.
- Correlations between leptin SD scores and BMI were analyzed.
Main Results:
- Girls with CPP exhibited modestly elevated serum leptin concentrations compared to healthy controls.
- A negative correlation was observed between leptin SD scores and BMI in girls with CPP.
- Serum leptin levels in boys with CPP did not significantly differ from healthy boys.
Conclusions:
- Girls with central precocious puberty (CPP) show slightly higher serum leptin levels than healthy children.
- The inverse relationship between leptin levels and BMI in girls suggests leptin may be associated with puberty initiation.
- Further research is needed to confirm these findings and elucidate leptin's precise role in human pubertal development.
Abstract:
Several studies have suggested that sufficient serum leptin levels may be involved in the initiation of puberty. To assess further the relationship between leptin and the onset of puberty in humans, we measured the serum leptin concentration in children with central precocious puberty (CPP). We studied 65 children with either idiopathic (IPP; n = 50 girls and 3 boys) or neurogenic central precocious puberty (NPP; n = 5 girls and 7 boys). The serum leptin levels in these patients were compared with normative data from healthy children and adolescents using SD scores that adjust for body mass index (BMI) and Tanner stage. The mean SD scores of IPP and NPP girls were +0.4 +/- 0.1 and +1.0 +/- 0.5, respectively, compared with that of age-matched prepubertal girls and +0.7 +/- 0.2 and +1.6 +/- 0.6 compared with that of girls matched for pubertal stage. The CPP girls with lower BMIs contributed larger SD scores, such that the leptin SD score was negatively correlated with BMI. A similar, modest increase in leptin levels in the CPP girls was evident when additional normative data were considered. The mean leptin SD scores of IPP and NPP boys were -0.9 +/- 0.5 and +0.7 +/- 0.3, respectively, compared with that of normal boys at Tanner stage 3-4. Serum leptin levels in the boys with CPP were not different from those in healthy boys in any of the normative studies. These data should be interpreted cautiously, but they suggest that girls with CPP have modestly elevated serum leptin concentrations compared with those in healthy children and adolescents. In addition, the negative correlation between the leptin SD score and BMI suggests that sufficient leptin levels may be associated with initiation of puberty in girls.