Is there a causal relationship between obesity and puberty?

Area of Science:

• Pediatric Endocrinology
• Reproductive Health
• Metabolic Disorders

Background:

• The relationship between adolescent obesity and pubertal onset is debated.
• Obesity shows varied effects on puberty timing in boys and girls.
• Mechanisms linking obesity and puberty onset require further elucidation.

Purpose of the Study:

• To review current knowledge on the association between obesity and the onset and tempo of puberty.
• To explore potential biological and environmental mechanisms involved.
• To summarize the consequences of early puberty in the context of obesity.

Main Methods:

• Systematic review of epidemiological, cross-sectional, and longitudinal studies.
• Analysis of proposed underlying biological pathways.
• Inclusion of research on nutritional, epigenetic, and environmental factors.

Main Results:

• Obese girls tend to experience earlier puberty onset.
• Overweight boys may mature earlier, while obese boys may mature later.
• Leptin and the kisspeptin system are highlighted as key mediators, alongside other adipokines and factors.

Conclusions:

• Obesity significantly impacts pubertal timing, with sex-specific differences observed.
• The interplay between adipose tissue signaling (leptin, kisspeptin) is crucial.
• Further research is needed to fully understand the complex mechanisms and long-term consequences.