hrp0095p1-375 | Sex Differentiation, Gonads and Gynaecology, and Sex Endocrinology | ESPE2022

Effects of long-term puberty suppression and gender-affirming hormones on body composition and metabolic profile in a preclinical mouse model and a cohort of transboys

Dubois Vanessa , Ciancia Silvia , Claessens Frank , Craen Margarita , El Kharraz Sara , Kim Nari , Klink Daniel , Sommers Vera , Vanderschueren Dirk , Cools Martine

Background: The increasing number of transgender adolescents presenting in early puberty requires to investigate the effects of long-term puberty suppression and gender-affirming hormones (GAH) on body composition and metabolism. Clinical studies have ethical and practical limitations. A preclinical mouse model may be helpful to gain mechanistic insights.Methods: Prepubertal (4week-old) female mice were treated with the ...

hrp0095p1-572 | Sex Differentiation, Gonads and Gynaecology, and Sex Endocrinology | ESPE2022

Long-term GnRHa use and bone health in transgender adolescents: can a mouse model inform clinical practice?

Ciancia Silvia , Dubois Vanessa , Claessens Frank , Craen Margarita , Doms Stefanie , El Kharraz Sara , Kim Nari , Klink Daniel , Vanderschueren Dirk , Cools Martine

Background: Transgender individuals increasingly present at gender services in childhood. Consequently, to suppress pubertal development, more adolescents are long-term exposed to gonadotropin-releasing hormone analogues (GnRHa), from onset of puberty until start of gender-affirming hormones (GAH), around 16 years. Prolonged GnRHa may compromise bone health more than shorter-term treatment. If earlier start of GAH, when psychologically indicated, may partially...