In Boys with Abnormal Developmental Tempo, Maturation of the Skeleton and the Hypothalamic-Pituitary-Gonadal Axis Remains Synchronous

• Published in: The journal of clinical endocrinology and metabolism Vol. 89; no. 1; pp. 236 - 241
• Main Authors: Flor-Cisneros, Armando, Leschek, Ellen W., Merke, Deborah P., Barnes, Kevin M., Coco, Marilena, Cutler, Gordon B., Baron, Jeffrey
• Format: Journal Article
• Language: English
• Published: Bethesda, MD Endocrine Society 01-01-2004; Copyright by The Endocrine Society
• Subjects: Adolescent; Adrenal Hyperplasia, Congenital - drug therapy; Adrenal Hyperplasia, Congenital - physiopathology; Aging; Biological and medical sciences; Body Height; Bone Development - physiology; Child; Endocrinopathies; Fundamental and applied biological sciences. Psychology; Growth Disorders - physiopathology; Humans; Hypothalamus - growth & development; Male; Medical sciences; Mutation; Pituitary Gland - growth & development; Puberty, Precocious - genetics; Puberty, Precocious - physiopathology; Receptors, LH - genetics; Testis - growth & development; Vertebrates: endocrinology; Human; Synchronous; Hypothalamohypophyseal axis; Development; Skeleton; Child; Endocrinology
• ISSN: 0021-972X; 1945-7197
• DOI: 10.1210/jc.2002-021954

The primary mechanism that initiates puberty is unknown. One possible clue is that pubertal maturation often parallels skeletal maturation. Conditions that delay skeletal maturation also tend to delay the onset of puberty, whereas conditions that accelerate skeletal maturation tend to hasten the onset of puberty. To examine this relationship, we studied boys with congenital adrenal hyperplasia (n = 13) and familial male-limited precocious puberty (n = 22), two conditions that accelerate maturational tempo, and boys with idiopathic short stature (n = 18) in which maturational tempo is sometimes delayed.
In all three conditions, the onset of central puberty generally occurred at an abnormal chronological age but a normal bone age. Boys with the greatest skeletal advancement began central puberty at the earliest age, whereas boys with the greatest skeletal delay began puberty at the latest age. Furthermore, the magnitude of the skeletal advancement or delay matched the magnitude of the pubertal advancement or delay. This synchrony between skeletal maturation and hypothalamic-pituitary-gonadal axis maturation was observed among patients within each condition and also between conditions. In contrast, the maturation of the hypothalamic-pituitary-gonadal axis did not remain synchronous with other maturational processes including weight, height, or body mass index.
We conclude that in boys with abnormal developmental tempo, maturation of the skeleton and the hypothalamic-pituitary-gonadal axis remains synchronous. This synchrony is consistent with the hypothesis that in boys, skeletal maturation influences hypothalamic-pituitary-gonadal axis maturation.