Sex-specific association between urinary kisspeptin and pubertal development

Area of Science:

• Endocrinology
• Reproductive Biology
• Pediatrics

Background:

• Kisspeptins are vital for pubertal development, but peripheral measurement challenges hinder research.
• Non-invasive, reliable peripheral kisspeptin assays are needed to study pubertal maturation.
• Existing methods for assessing kisspeptin levels are often invasive or complex.

Purpose of the Study:

• To investigate the relationship between urinary kisspeptin concentrations and pubertal development markers in adolescents.
• To explore potential sex differences in peripheral kisspeptin levels during sexual maturation.
• To validate midstream urine samples as a non-invasive method for measuring kisspeptin.

Main Methods:

• Analysis of midstream urine samples for kisspeptin concentrations in 209 participants (9-15 years old).
• Correlation of urinary kisspeptin levels with age, self-reported pubertal status, and salivary testosterone/DHEA-S.
• Comparison of kisspeptin concentrations between males and females across different pubertal stages.

Main Results:

• Significant sex differences in urinary kisspeptin concentrations emerged after age 12.
• In males, kisspeptin levels positively correlated with developmental markers (age, testosterone, DHEA-S).
• Female kisspeptin concentrations remained stable and showed no significant correlation with maturation markers.

Conclusions:

• Urinary kisspeptin measurement is a viable non-invasive method for assessing peripheral kisspeptin.
• Distinct patterns of urinary kisspeptin changes during puberty exist between males and females.
• These findings support the use of urine samples to study kisspeptin's role in pubertal development and sexual maturation.