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Should Skeletal Maturation Be Manipulated for Extra Height Gain?

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Hormone therapies like GnRH analogues and aromatase inhibitors can influence skeletal maturation in children with growth disorders. Combining these with growth hormone may improve adult height, but more data is needed for aromatase inhibitors.

Keywords:
GnRH analogueadult heightaromatase inhibitorsbone agegrowthgrowth hormonepredicted adult heightskeletal maturation

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Area of Science:

  • Pediatric Endocrinology
  • Growth and Development
  • Pharmacology

Background:

  • Skeletal maturation can be modulated by altering estrogen exposure.
  • Gonadotropin-releasing hormone analogues (GnRHa) halt puberty, while aromatase inhibitors (AIs) block estrogen synthesis.
  • These agents are used off-label in children with growth disorders, often with recombinant human growth hormone (rhGH).

Purpose of the Study:

  • To review the efficacy and safety of GnRH analogues and aromatase inhibitors, alone or with rhGH, in improving adult height (AH) in children with various growth disorders.
  • To assess the impact of these hormonal interventions on children with central precocious puberty, growth hormone deficiency, small-for-gestational age, congenital adrenal hyperplasia, and idiopathic short stature.

Main Methods:

  • Review of existing literature on the use of GnRH analogues and aromatase inhibitors in pediatric growth disorders.
  • Analysis of studies investigating monotherapy or combination therapy with rhGH.
  • Evaluation of reported adult height outcomes and safety profiles.

Main Results:

  • GnRHa is effective for achieving normal AH in central precocious puberty; its effect in short children with normal puberty is less clear.
  • Co-treatment with GnRHa and rhGH improves AH in specific pediatric populations, including those with GHD, SGA, congenital adrenal hyperplasia, and idiopathic short stature.
  • Aromatase inhibitors (letrozole, anastrozole) show potential for increasing AH in some cases, but data is limited, and safety profiles are conflicting.

Conclusions:

  • GnRH analogues generally have a favorable safety profile and can improve adult height in conjunction with rhGH for specific pediatric growth conditions.
  • Aromatase inhibitors' efficacy and safety in improving adult height require further investigation due to limited data and conflicting reports.
  • Optimizing adult height in children with growth disorders may involve tailored hormonal therapies, but careful consideration of evidence and safety is crucial.