Studies of gonadotropin-gonadal dynamics in patients with androgen insensitivity

Robert M. Boyar, Ronald J. Moore, William Rosner, James Aiman, John Chipman, James D. Madden, James F. Marks, Jim Griffin III

Research output: Contribution to journalArticle

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Abstract

Four patients with androgen insensitivity had plasma LH and FSH measured at 20-min intervals for 24 h and at 15- to 30-min intervals for 3 h after the injection of LRH. Twenty-four-hour mean testosterone (T), estradiol, and androstenedione (A4) levels were also measured. Patients with androgen insensitivity had significantly elevated LH levels (P < 0.05) and an increase in the number of LH secretory episodes (P < 0.001) compared to normal subjects. The amplitude of the LH secretory episodes, expressed as the absolute increment, was significantly higher than normal controls (P < 0.005). The LH response to LRH (absolute increment) was twice that of normal, but was not significantly different from normal subjects. The 24-h mean FSH levels were normal in three of the patients and elevated in one. This patient had the mildest degree of androgen insensitivity on clinical exam and the greatest degree of testicular atrophy. The 24-h mean T, estradiol, and A4 levels were higher than normal, but only the Δ4 was significantly increased (P < 0.05). To determine if the elevated LH levels were in response to a decrease in the free T level, we measured T-binding capacity (TBG). TBG was higher than normal controls but was not significantly different, suggesting that elevated LH levels were probably in response to a decrease in T action at the hypothalamic-pituitary level. This was further supported by the inability of prolonged dihydrotestosterone administration to affect LH secretion in one of the patients with the Reifenstein syndrome.

Original languageEnglish (US)
Pages (from-to)1116-1122
Number of pages7
JournalJournal of Clinical Endocrinology and Metabolism
Volume47
Issue number5
DOIs
StatePublished - Jan 1 1978

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Gonadotropins
Androgens
Estradiol
Androstenedione
Dihydrotestosterone
Testosterone
Androgen-Insensitivity Syndrome
Plasmas
Atrophy
Injections

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical

Cite this

Studies of gonadotropin-gonadal dynamics in patients with androgen insensitivity. / Boyar, Robert M.; Moore, Ronald J.; Rosner, William; Aiman, James; Chipman, John; Madden, James D.; Marks, James F.; Griffin III, Jim.

In: Journal of Clinical Endocrinology and Metabolism, Vol. 47, No. 5, 01.01.1978, p. 1116-1122.

Research output: Contribution to journalArticle

Boyar, Robert M. ; Moore, Ronald J. ; Rosner, William ; Aiman, James ; Chipman, John ; Madden, James D. ; Marks, James F. ; Griffin III, Jim. / Studies of gonadotropin-gonadal dynamics in patients with androgen insensitivity. In: Journal of Clinical Endocrinology and Metabolism. 1978 ; Vol. 47, No. 5. pp. 1116-1122.
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