Hormone Agonist Therapy Disrupts Bone Density in Transgender Youth
The use of gonadotropin-releasing hormone agonists has a negative effect on bone mass in transgender youth, according to data from 172 individuals. The onset of puberty and pubertal hormones contributes to the development of bone mass and body composition in adolescence, wrote Behdad Navabi, MD, and colleagues at Children's Hospital of Eastern Ontario, Canada. Although the safety and efficacy of gonadotropin-releasing hormone agonists (GnRHa) has been described in short-term studies of youth with gender dysphoria, concerns persist about suppression of bone mass accrual from extended use of GnRHas in this population, they noted.
@arpo In a study published in Pediatrics, the researchers reviewed data from 172 youth younger than 18 years of age who were treated with GNRHa and underwent at least one baseline dual-energy radiograph absorptiometry (DXA) measurement between January 2006 and April 2017 at a single center. The standard treatment protocol started with three doses of 7.5 mg leuprolide acetate, given intramuscularly every 4 weeks, followed by 11.25 mg intramuscularly every 12 weeks after puberty suppression was confirmed both clinically and biochemically. Areal bone mineral density (aBMD) measurement z scores were based on birth-assigned sex, age, and ethnicity, and assessed at baseline and every 12 months. In addition, volumetric bone mineral density was calculated as bone mineral apparent density (BMAD) at the lower spine, and the z score based on age-matched, birth-assigned gender BMAD.