Genetics of pubertal timing.

Area of Science:

• Genetics
• Endocrinology
• Reproductive Biology

Background:

• Pubertal timing is a complex trait influenced by genetic and environmental factors.
• Variations in pubertal timing include precocious puberty (early onset) and delayed puberty (late onset).
• Understanding the genetic basis of pubertal timing is crucial for diagnosing and managing related disorders.

Purpose of the Study:

• To review recent advancements in the genetics of normal pubertal timing.
• To summarize the genetic underpinnings of precocious and delayed puberty.
• To explore potential mechanisms by which genes regulate pubertal timing.

Main Methods:

• Genome-wide association studies (GWAS) have identified numerous genetic loci associated with pubertal timing.
• Candidate gene studies have implicated specific genes in rare cases of precocious and delayed puberty.
• Review of existing literature on genetic factors influencing pubertal development.

Main Results:

• Hundreds of genetic loci influencing normal pubertal timing have been identified across diverse populations.
• Specific genes have been linked to the etiology of precocious and delayed puberty.
• Potential genetic mechanisms involve the development and function of the gonadotropin-releasing hormone (GnRH) neuronal network and end-organ sensitivity.

Conclusions:

• Significant progress has been made in identifying genetic loci that regulate normal pubertal timing.
• The first single-gene causes for precocious and delayed puberty are being elucidated.
• Further research is needed to fully understand the functional impact of these genes on pubertal regulation.