Effect of a GnRH injection on kisspeptin levels in girls with suspected precocious puberty: a randomized-controlled pilot study.

• Tác giả: Maria Lodefalk, Eva Rask, Maria Rodanaki
• Ngôn ngữ: eng
• Ký hiệu phân loại: 363.737 Measures to prevent, protect against, limit effects of pollution
• Thông tin xuất bản: Germany : Journal of pediatric endocrinology & metabolism : JPEM , 2025
• Bộ sưu tập: NCBI
• ID: 678929

Tóm tắt

OBJECTIVES: Kisspeptin plays a major role in the onset of puberty by stimulating the gonadotropin-releasing hormone (GnRH) neurons. The aim of this study was to investigate whether GnRH inhibits kisspeptin secretion via a negative feedback mechanism and potential associations between kisspeptin levels and other hormones of importance for pubertal onset. METHODS: Thirteen girls with suspected central precocious puberty underwent a GnRH stimulation test twice in a randomized, placebo-controlled manner. Blood was sampled up to 150 min after an IV injection of either Relefact LHRH RESULTS: Baseline kisspeptin levels ranged from 9.9 to 201.6 pg/mL. Neither area under the curve for kisspeptin levels nor peaks were significantly lower after the GnRH injection compared to placebo. Baseline kisspeptin and glucose levels tended to be associated (rho=0.55, p=0.051) but no other associations were found between kisspeptin and other hormones. CONCLUSIONS: Basal levels of kisspeptin vary widely in young girls. We found no evidence of a negative feedback mechanism of GnRH on kisspeptin in this small pilot study. The suggested association between kisspeptin and glucose levels needs further investigations.