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GH and GnRH-gonadotropin secretion.

Adriana De Sousa Lages1, Valentim Lopes2, Richard Anderson3

  • 1Endocrinology Department, ULS Braga, Braga, Portugal; Faculty of Medicine, University of Coimbra, Coimbra, Portugal; School of Medicine, University of Minho, Braga, Portugal.

Vitamins and Hormones
|March 30, 2026
PubMed
Summary
This summary is machine-generated.

The hypothalamic pituitary gonadal (HPG) and somatotropic (HPS) axes interact to regulate growth and reproduction. Their crosstalk is crucial for puberty and has therapeutic implications for growth disorders and reproductive medicine.

Keywords:
FertilityGHGonadalIGF-1KisspeptinPubertyReproductiveSomatropin

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Area of Science:

  • Neuroendocrinology
  • Reproductive Medicine
  • Pediatric Endocrinology

Background:

  • The hypothalamic pituitary gonadal (HPG) and hypothalamic pituitary somatotropic (HPS) axes are interconnected, regulating growth, metabolism, and reproduction via feedback loops.
  • Growth hormone (GH) and insulin-like growth factor 1 (IGF-1) influence reproductive functions, while sex steroids modulate GH secretion, creating a complex interplay.
  • This crosstalk is particularly significant during puberty, establishing an anabolic state essential for linear growth, skeletal maturation, and reproductive development.

Purpose of the Study:

  • To explore the intricate crosstalk between the HPG and HPS axes.
  • To highlight the diagnostic and therapeutic implications of this neuroendocrine axis interaction.
  • To discuss emerging strategies for modulating these axes in clinical practice.

Main Methods:

  • Review of existing literature on the neuroendocrine regulation of growth and reproduction.
  • Analysis of the interplay between GH, IGF-1, GnRH, kisspeptin, and sex steroids.
  • Examination of clinical applications in pediatric growth disorders and reproductive medicine.

Main Results:

  • GH and IGF-1 stimulate reproductive functions, while sex steroids enhance GH secretion, demonstrating reciprocal feedback.
  • Combined GH and GnRH analogue therapy shows potential for treating short stature and precocious puberty.
  • GH as an adjuvant in assisted reproductive technologies may improve outcomes, though live birth rates require further study.

Conclusions:

  • The coordinated regulation of GnRH and GH axes is vital for normal growth and reproductive health.
  • Understanding this crosstalk offers significant diagnostic and therapeutic opportunities in neuroendocrinology.
  • Emerging interventions targeting kisspeptin offer novel approaches for managing hypogonadism and functional hypothalamic disorders.