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Biomedical subjects

R N Turksoy

Publications and source records attributed to R N Turksoy.

32 records · Page 2Linked to original sources
PubMed1978

Response of amenorrheic patients with normal serum prolactin to chlorpromazine during administration of human menopausal gonadotropin.

To study the effects of graded amounts of estrogens on prolactin (PRL) secretion, PRL response to chlorpromazine (CPZ) during administration of human menopausal gonadotropin (hMG) was determined. A control CPZ test was done prior to initiation of hMG therapy and the test was repeated when endogenous estrogen secretion reached the physiologic range (350 to 400 pg. per milliliter) which stimulates luteinizing hormone surge in the normal ovulatory menstrual cycle. Six euprolactinemic women with secondary amenorrhea were studied. Studies showed that there was no significant change in the mean serum prolactin concentrations during control and repeat CPZ testing procedure (5.8 +/- 2 and 10.8 +/- 2 ng. per milliliter, p less than 0.1). The maximal response of PRL to CPZ was significantly higher during hMG-induced high estrogenic state than during control testing (69.9 and 32.3 ng. per milliliter, p less than 0.01). This findings suggests that endogenous estrogen may play a role in the regulation of serum prolactin concentration during the menstrual cycle.

Amenorrhea↗
PubMed1978

Diagnostic evaluation of hirsutism in women by selective bilateral adrenal and ovarian venous catheterization.

To determine the most significant secretory source of their androgens, 13 hirsute nonvirilized women underwent selective bilateral adrenal and ovarian venous catheterization to obtain effluent blood for the assay of testosterone and delta4-androstenedione. In three patients the testosterone and delta4-androstenedione gradients were significantly greater in the adrenal venous effluents. Testosterone and delta4-androstenedione gradients were significantly greater in the ovarian venous effluents in four patients. In six patients there were no significant differences in the testosterone gradients between the adrenal and ovarian venous effluents. The delta4-androstenedione gradients were greater in the adrenal venous effluents in three of these patients, greater in the ovarian venous effluents in one, and not significantly different in two of these patients. The fact that the measurement of urinary 17-ketosteroid excretion, the suppressibility of peripheral plasma androgens with dexamethasone, and the stimulation of peripheral plasma androgens with human chorionic gonadotropin correlated poorly with the selective catheterization data suggests that the former modalities are imprecise in the diagnostic evaluation of hirsutism in women.

17-Ketosteroids↗
PubMed1977

Pregnancy following the "insensitive ovary syndrome".

A patient in whom the "insensitive ovary syndrome" was followed by a successful pregnancy is reported and discussed. Conception occurred while this patient was receiving estrogen therapy. The marked differences in her ovarian responsivity to endogenous and exogenous gonadotropin stimulation remain enigmatic.

Adult↗
PubMed1977

Galactorrhea-amenorrhea syndrome: diagnosis and therapy.

Tests of prolactin regulation in the galactorrhea-amenorrhea syndrome were compared in 18 patients with normal pituitary fossae, seven patients with prolactin-secreting adenomas, and eight normal women. Mean basal prolactin was highest in patients with adenomas and was elevated in those with normal fossae when compared with normal subjects (278 versus 73 versus 10.2 ng/ml). Levodopa, water loading, or luteinizing hormone-releasing hormone testing were of no predictive value in the diagnosis of adenoma. Some patients with adenomas show a greater prolactin response after administration of thyrotrophin hormone-releasing hormone (TRH) than of chlorpromazine, whereas these responses are usually similar in patients with normal fossae. A mean basal prolactin level above 150 ng/ml or an increase of more than 100 ng/ml after TRH administration in a patient with hyperprolactinemia unresponsive to chlorpromazine stimulation strongly suggests a prolactin-secreting tumor. However, because some patients with tumor have prolactin levels below 150 ng/ml, or do not respond to TRH stimulation, or both, functional studies alone cannot permit the diagnosis of all adenomas before the appearance of radiographic changes.

Adenoma↗
PubMed1977

The primary empty sella syndrome.

An extreme and unique manifestation of the primary empty sella syndrome was found by the pneumoencephalographic demonstration of air in the sella turcica of a short, 18-year-old, prepubescent female with primary amenorrhea. Gonadotropins and growth hormone were selectively deficient and not stimulated by luteinizing hormone releasing hormone (LHRH) or insulin induced hypoglycemia, respectively.

Adolescent↗
PubMed1976

Testicular response to exogenous gonadotropins in the syndrome of feminizing testes.

The steroid response of testes to exogenous gonadotropin administration was studied before castration in a patient with the complete form of the testicular feminization syndrome. Urinary steroid determination were made along with measurements of plasma testosterone during adrenal suppression with dexamethasone and after stimulation with human menopausal gonadotropin (HMG) and HMG plus human chorionic gonadotropin (HCG). Our data provide evidence that the gonads in the testicular feminization syndrome synthesize steroids normally. Estrogens and testosterone are secreted by the testes, and the Leydig cells of the testes are capable of responding to exogenous HMG and HCG stimulation. These findins are consistent with the hypothesis that there is no abnormal testicular steroidogenesis in these genotypic males. Additional evidence is provided that these gonads secrete testosterone in amounts comparable to those of normally functioning testes. Failure of virilization in the presence of androgen secretion as indicated by previous authors is probably the result of a deficiency of androgenic action at the end organs. The presence of sparse pubic and axillary hair in the mother and the finding of the same type of karyotype (46,XY) in a sibling suggest that hereditary factors play a role in this disorder.

17-Ketosteroids↗
PubMed1975

Immediate effect of prostaglandin F2alpha during the luteal phase of the menstrual cycle.

Serum luteinizing hormone, estradiol, 17-hydroxyprogesterone, and progesterone determinations were performed in five normally ovulating women prior to, during, and after prostaglandin F2alpha (PGF2alpha was infusion. A total of 75 mg of PGF2alpha was infused over 48 hours, beginning on the 4th day of the luteal phase. Endometrial biopsies were obtained at the completion of the infusion. In all patients, transient decreases in serum progesterone and 17-hydroxyprogesterone levels were observed during PGF2alpha infusion. Subsequent rises in the serum progesterone and 17-hydroxyprogesterone levels were observed 24 hours after completion of the infusion. There was no significant change in serum luteinizing hormone levels. Premature menstrual bleeding occurred with 24 to 72 hours after the termination of the infusion, while progesterone and 17-hydroxyprogesterone levels were still elevated. Endometrial histology revealed focal stromal necrosis in the presence of the normal secretory endometrium. It is concluded that, in the human, PGF2alpha at this dose and time schedule is not luteolytic.

Adult↗