TY - JOUR
T1 - Studies of gonadotropin-gonadal dynamics in patients with androgen insensitivity
AU - Boyar, Robert M.
AU - Moore, Ronald J.
AU - Rosner, William
AU - Aiman, James
AU - Chipman, John
AU - Madden, James D.
AU - Marks, James F.
AU - Griffin III, Jim
PY - 1978/11
Y1 - 1978/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0018134393&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0018134393&partnerID=8YFLogxK
U2 - 10.1210/jcem-47-5-1116
DO - 10.1210/jcem-47-5-1116
M3 - Article
C2 - 122420
AN - SCOPUS:0018134393
SN - 0021-972X
VL - 47
SP - 1116
EP - 1122
JO - Journal of Clinical Endocrinology and Metabolism
JF - Journal of Clinical Endocrinology and Metabolism
IS - 5
ER -