Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P01189 (beta-endorphin)
 21,003 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

To determine whether CRH affects adrenal androgen, beta-endorphin (B-E), and ACTH secretion in normal children during sexual maturation, 17-hydroxyprogesterone (17-OHP), androstenedione (D4-A), dehydroepiandrosterone (DHEA), DHEA sulfate (DS), cortisol, B-E, and ACTH were measured after an iv injection of 1 microgram/kg human CRH. Children with premature pubarche were similarly analyzed to establish whether this condition is accompanied by altered hormonal responses to CRH. CRH produced consistent increases in ACTH, B-EP, and cortisol blood levels, which were comparable at all age intervals in all groups. 17-OHP increased after CRH injection, but its response linearly with age. D4-A levels were not influenced, while DHEA and DS levels were only partially influenced by CRH. The stimulated D4-A to 17-OHP ratio increased with sexual maturation, whereas ratios of cortisol to 17-OHP and D4-A to DHEA remained constant. Children with premature pubarche had hormonal responses similar in magnitude to those of prepubertal children of comparable age. In conclusion, an increase in 17,20-desmolase efficiency occurs with postnatal maturation after CRH challenge. Moreover, CRH does not appear to play an important role in premature pubarche.
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PMID:Adrenal steroid, cortisol, adrenocorticotropin, and beta-endorphin responses to human corticotropin-releasing hormone stimulation test in normal children and children with premature pubarche. 255 May 9

The response to a rapid intravenous administration of adrenocorticotropin (ACTH, cortrosyn) was compared in 24 unexplained infertile women and 13 fertile women. There was no significant difference in the response to a rapid ACTH stimulation as expressed by the slope of testosterone (T) response in both groups. However, the individual and mean T values prior and following the stimulation were significantly higher in the infertile group (P less than 0.001; P less than 0.005, respectively). There was no significant difference in individual values as well as in mean basal values or in mean values of 17-hydroxyprogesterone (17-OHP) after the stimulation between the two study groups (P less than 0.3; P less than 0.9, respectively). There was no significant difference in individual values as well as in mean values of dehydroepiadnrosterone (DHEA) before or 90 min after the stimulation between the two study groups (P less than 0.1; P less than 0.2, respectively). It can therefore be concluded that the elevated basal testosterone values in the infertile group originated from the ovary. Despite the fact that no attempt was made to reduce androgen values 7 (46.66%) of 15 infertile women who were available for follow-up and treatment conceived following ovulation induction therapy.
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PMID:Adrenal response to adrenocorticotropin stimulation in unexplained infertile women. 290 88

Results of supraphysiological adrenocorticotropic hormone (ACTH) stimulation of biosynthetic pathways of adrenal zona fasciculata indicate that a deficiency of 11-hydroxylase exists in patients with essential hypertension. The deficiency is suggested by the much greater stimulus of synthesis of deoxycorticosterone (DOC) and deoxycortisol in hypertensive subjects than in controls (p less than 0.001). No significant difference in the synthesis of cortisol, corticosterone, progesterone, 17-hydroxyprogesterone (17-OHP), and delta-4-androstenedione (D4) was observed between the two groups. The ratios for synthesis of DOC and corticosterone and for deoxycortisol and cortisol found in hypertensive patients were significantly higher than those found in controls (p less than 0.001); no significant difference was observed in the synthesis of 17-OHP and progesterone. The synthesis of DOC and deoxycortisol was not significantly correlated with either blood pressure or plasma renin activity. Plasma renin activity was significantly lower in hypertensive subjects than in normotensive subjects (p less than 0.0001), while no difference was found in aldosterone secretion between the two groups. The 11-hydroxylase deficiency in the adrenal zona fasciculata may be one of the genetic factors causing hypertension together with environmental factors (particularly salt intake and work-related stress). The investigation performed in our study may be useful for the evaluation of adrenal zona fasciculata enzymatic activities during the study of hypertensive patients.
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PMID:Partial deficiency of adrenal 11-hydroxylase. A possible cause of primary hypertension. 298 17

The effect of spironolactone on adrenal androgen and cortisol production was studied in six hirsute women. Hirsute women were evaluated before and 1 month after receiving 200 mg of spironolactone daily. Basal levels of serum androgens, 17-hydroxyprogesterone (17-OHP), cortisol (F), corticosteroid-binding globulin, and plasma adrenocorticotropic hormone (ACTH) were normal and did not change with therapy. The delta maximum (delta max) responses after dexamethasone suppression and ACTH administration of dehydroepiandrosterone (DHEA), androstenedione (delta 4A), 17-hydroxypregnenolone, and 17-OHP were similar in hirsute women and ovulatory control subjects. After spironolactone administration, the delta max DHEA response was unchanged, whereas the delta max delta 4A response was decreased (P less than 0.05). The delta max ratios of DHEA/delta 4A and 17-OHP/delta 4A were significantly increased after spironolactone in hirsute women, which suggested inhibitions of 3 beta-ol-dehydrogenase-isomerase and delta 4 17,20 desmolase activities. A significant reduction in delta max F occurred after spironolactone administration (P less than 0.05). Although baseline 11-desoxycortisol (S) and the plasma S/ACTH ratio were unaltered, the delta max S/F ratio increased after treatment (P less than 0.01), suggesting an inhibition of 11 beta-hydroxylase activity. Inhibition of adrenal androgen production occurs with spironolactone, but only serum levels of delta 4A are decreased, whereas DHEA and its sulfate (DHEA-S) levels remain unchanged.
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PMID:The effects of spironolactone on adrenal steroidogenesis in hirsute women. 299 51

To determine the prevalence of the attenuated form of congenital adrenal hyperplasia (CAH) and hyperprolactinemia (HPPN) relative to polycystic ovarian disease (PCOD), 100 consecutive women presenting with the classic clinical features of PCOD were evaluated by basal hormonal profiles and subsequent adrenocorticotropic hormone (ACTH) stimulation tests. The study also sought biochemical markers for CAH other than ACTH stimulation. The prevalences were found to be as follows: PCOD, 65%; PCOD with HPPN, 9%; HPPN, 3%, end-organ hypersensitivity (EOH), 4%; homozygotic CAH, 4%; and heterozygotic CAH, 15%. Other than the differential response to ACTH, the only other biochemical markers observed for homozygotic CAH were significantly higher basal levels of testosterone (T) and 17 alpha-hydroxyprogesterone (17-OHP). Luteinizing hormone/follicle-stimulating hormone ratio, androstenedione, and dehydroepiandrosterone sulfate all showed no significant differences between homozygotic CAH, heterozygotic CAH, HPPN, PCOD, and EOH. This study establishes the relative prevalences of the syndromes commonly mimicking PCOD. We also conclude that the observed low incidence of CAH does not justify routine ACTH testing on all patients presenting with features of PCOD--however, our data suggest that patients with basal serum levels of T and 17-OHP greater than 50% above the upper limit of normal should undergo this dynamic test, especially if there are also certain clinical features suggestive of CAH.
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PMID:Prevalence of and markers for the attenuated form of congenital adrenal hyperplasia and hyperprolactinemia masquerading as polycystic ovarian disease. 301 93

The response profiles of fetal sheep adrenals to tropic stimulation have been examined ih vivo and in vitro. Isolated adrenal cells from sheep fetuses in early pregnancy (Day 50) reduced cortisol in response to ACTH, dibutyryl cyclic AMP and GTP. The response was minimal on Day 100, but reappeared near term. 17 alpha-Hydroxyprogesterone was converted to cortisol by adrenals of all ages, but pregnenolone and progesterone were converted to cortisol only in early and late, but not mid-pregnancy. These studies suggested that the mid-gestation loss of fetal adrenal responsiveness was associated with post-receptor/adenylate cyclase events and involved loss of 17 alpha-hydroxylase activity. Fetal adrenal function was activated by exogenous ACTH in vivo, and was reflected in an increase in the ratio of cortisol to corticosterone in fetal plasma and in augmented cortisol output in vitro from dispersed fetal adrenal cells. The results were consistent with an effect of ACTH administration on 17 alpha-hydroxylation. Fetal pituitary cells, prostaglandin E2, alpha-MSH and term placental extract are other potential (sources of) corticotropins, although further studies are required to delineate the nature and origin of the active substances, and/or their primary sites of action.
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PMID:The development of fetal adrenal function. 627 66

An 11-year-old patient with male pseudohermaphroditism presented with essentially normal-appearing female external genitalia. When examined, inguinal gonads, redundant foreskin, and some posterior labial fusion were found. Evaluation revealed basal testosterone (T) levels ranging from 65 to 107 ng/dl with slightly elevated serum gonadotropin levels (luteinizing hormone [LH]: 76 ng/ml, and follicle-stimulating hormone [FSH]: 568 ng/ml). Neither T nor its precursors increased with human chorionic gonadotropin (hCG) stimulation. However, progesterone (P), 17-hydroxyprogesterone (17-OHP), and cortisol (F) responses to adrenocorticotropic hormone (ACTH) were normal. Androgen binding and 5 alpha-reductase activity in cultured genital skin fibroblasts were normal. These data, plus the microscopic finding of a markedly reduced number of Leydig cells, strongly suggest that the male pseudohermaphroditism in this patient was due to inadequate Leydig cell function unrelated to LH receptors.
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PMID:Leydig cell hypofunction resulting in male pseudohermaphroditism. 628 Oct 87

Because, in recent years, patients with incidentally discovered adrenal masses have been encountered increasingly, their endocrine function was investigated in basal conditions and after dynamic tests. Thirty-two patients (23 women and 9 men, aged 28-74 years) were studied. Lesion diameter, as documented by computed tomography and/or nuclear magnetic resonance imaging, ranged between 5 and 65 mm; the tumors were localized on the right in 22 patients, on the left in 5 and bilaterally in 5 cases. In basal conditions, urinary free cortisol (UFC) excretion, plasma adrenocorticotropin (ACTH) and cortisol levels were normal, except for 4 patients who showed high UFC and ACTH levels in the low-normal range. Ovine corticotropin-releasing hormone (CRH, 1 microgram/kg iv) was given to 18 patients, inducing normal ACTH and cortisol responses in 12, blunted responses in 4 and no response in 2 cases. No reduction in ACTH and cortisol levels after suppression tests was observed in 4 of 29 patients after dexamethasone (1 mg overnight) or in 6 of 29 after loperamide. The 4 patients who were unresponsive to both tests did not show any further inhibition after high-dose dexamethasone administration, had low plasma ACTH levels and showed impaired or absent responses to the CRH test: they were diagnosed as affected with preclinical Cushing's syndrome. An exogenous ACTH test performed in 30 patients caused a normal cortisol rise. Basal mean 17-hydroxy-progesterone (17-OHP) levels were not different from those in normal subjects.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Abnormalities of endocrine function in patients with clinically "silent" adrenal masses. 771 78

Nine women with clinical features of polycystic ovarian syndrome (PCOS) were studied in order to establish the differential diagnosis with late-onset adrenal hyperplasia (LOAH). Their hirsutism was classified as moderate in five patients and severe in the remaining four cases. All patients had bilateral polycystic ovarian enlargement by ultrasound examination. As a control group five women with normal ovarian function without hirsutism were submitted to the same protocol of study. The patients studied as well as the women of the control group had basal serum determinations of pregnenolone (P5),17-hydroxypregnenolone (17-OHP5),dehydroepiandrosterone (DHEA), pregesterone (P), 17-hydroxyprogesterone (17-OHP), androstenedione (A), testosterone and cortisol by radioimmunoassay techniques. The basal serum levels of androgens showed no correlation with the severity of hirsutism or with the ultrasound findings. An adrenal stimulation with synthetic adrenocorticotropic hormone (ACTH) to all women was performed in order to assess their adrenal responsiveness. The analysis of the ratios between delta 5 and delta 4 steroids demonstrated a partial enzymatic blockade at the level of 3 beta-o1-hydroxysteroid dehydrogenase (3-HSD) in three patients. The blockade was particularly in the conversion of P5 to P and 17-OHP5 to 17-OHP. The lack of delta 4 steroid secretion in the presence of normal increase of delta 5 precursors following ACTH was noted. These findings confirm the clinical use of the ACTH stimulation test to reveal the presence of enzymatic alterations in adrenal steroidogenesis in some patients previously considered to have PCOS. Since it wa demonstrated that the conversion steps were affected in variable degrees, the presence of different isoenzymes of 3-HD is suggested.
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PMID:Heterogeneity of late-onset adrenal 3 beta-ol-hydroxysteroid dehydrogenase deficiency in patients with hirsutism and polycystic ovaries. 780 81

Adrenal hyperandrogenism is a common feature of patients with polycystic ovary syndrome (PCO). This may be due to enhanced adrenal sensitivity to ACTH. Because enhanced ovarian androgen secretion does not appear to explain this phenomenon, we explored the role of estrogen in inducing enhanced adrenal sensitivity, in that a state of relative hyperestrogenism exists in PCO. Eight patients with PCO and seven matched controls received ovine corticotropin-releasing hormone (oCRH; 0.1 micrograms/kg) iv before and after hypoestrogenism was induced by leuprolide acetate (LA; 1 mg, sc, each day). In patients with PCO, a third oCRH test was repeated after transdermal estradiol (E2; 0.1 mg) had been applied for a week, during which time LA was continued. At baseline, patients with PCO had increased responses of 11 beta-hydroxyandrostenedione and dehydroepiandrosterone (P < 0.03 and P < 0.02) and increased delta maximal ratios of androstenedione (A4)/ACTH and dehydroepiandrosterone/ACTH (P < 0.01) after oCRH treatment. After LA administration to patients with PCO, these ratios were significantly suppressed (P < 0.01) and returned to baseline after E2 was added. There were no changes in controls. Steroid ratio responses to oCRH suggested that 17,20-desmolase activity (delta maximum change in the ratio of A4/17-hydroxyprogesterone) was lowered with estrogen suppression and increased again after transdermal E2 administration. There was a significant positive correlation between changes in E2 levels and delta maximum change in the ratios of A4/17-OHP after oCRH treatment, signifying 17,20-desmolase activity (r = 0.58, P < 0.02). In conclusion, these data provide evidence that estrogen is at least one factor that influences adrenal androgen sensitivity in PCO and may help explain the frequent finding of adrenal hyperandrogenism in this syndrome.
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PMID:The impact of estrogen on adrenal androgen sensitivity and secretion in polycystic ovary syndrome. 785 27


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