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1.
Ophthalmology ; 124(4): 505-511, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-28139245

RESUMO

PURPOSE: To test the association between serum metabolites and dry eye disease (DED) using a hypothesis-free metabolomics approach. DESIGN: Cross-sectional association study. PARTICIPANTS: A total of 2819 subjects from the population-representative TwinsUK cohort in the United Kingdom, with a mean age of 57 years (range, 17-82 years). METHODS: We tested associations between 222 known serum metabolites and DED. All subjects underwent nontargeted metabolomic analysis of plasma samples using gas and liquid chromatography in combination with mass spectrometry (Metabolon Inc., Durham, NC). Dry eye disease was defined from the validated Short Questionnaire for Dry Eye Syndrome (SQDES) as a previous diagnosis of DED by a clinician or "often" or "constant" symptoms of dryness and irritation. Analyses were performed with linear mixed effect models that included age, BMI, and sex as covariates, corrected for multiple testing. MAIN OUTCOME MEASURES: Primary outcome was DED as defined by the SQDES, and secondary outcomes were symptom score of DED and a clinical diagnosis of DED. RESULTS: Prevalence of DED as defined by the SQDES was 15.5% (n = 436). A strong and metabolome-wide significant association with DED was found with decreased levels of the metabolites androsterone sulfate (P = 0.00030) and epiandrosterone sulfate (P = 0.00036). Three other metabolites involved in androgen metabolism, 4-androsten-3beta,17beta-diol disulfate 1 and 2, and dehydroepiandrosterone sulfate, were the next most strongly associated of the 222 metabolites, but did not reach metabolome-wide significance. Dryness and irritation symptoms, as opposed to a clinical diagnosis, were particularly strongly associated with decreased androgen steroid metabolites, with all reaching metabolome-wide significance (androsterone sulfate, P = 0.000000029; epiandrosterone sulfate, P = 0.0000040; 4-androsten-3beta,17beta-diol disulfate 1, P = 0.000016; 4-androsten-3beta,17beta-diol disulfate 2, P = 0.000064; and dehydroepiandrosterone sulfate, P = 0.00011). Of these 5 androgens, epiandrosterone sulfate (P = 0.0076) was most associated with 2-year incidence of clinician-diagnosed DED. In addition, we found decreased glycerophosphocholines to be associated with DED, although not at metabolome-wide significance. CONCLUSIONS: This hypothesis-free metabolomic approach found decreased serum androgens to be highly associated with DED and adds important evidence to the growing body of research that links androgens to ocular surface disease and DED.


Assuntos
Androgênios/sangue , Biomarcadores/sangue , Síndromes do Olho Seco/sangue , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Androstenodióis/sangue , Androsterona/análogos & derivados , Androsterona/sangue , Estudos de Coortes , Estudos Transversais , Sulfato de Desidroepiandrosterona/sangue , Síndromes do Olho Seco/diagnóstico , Feminino , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Masculino , Metaboloma , Pessoa de Meia-Idade , Fatores de Risco , Inquéritos e Questionários
2.
Horm Metab Res ; 49(1): 16-22, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27813048

RESUMO

Despite several scientific and technological advances, there is no single neuroprotective treatment that can reverse the brain damage after acute ischemic stroke (AIS). Neuroactive steroids are cholesterol-derived hormones that have the ability to modulate the normal and pathologic nervous system employing genomic and nongenomic mechanisms. In this work, we first investigated if AIS affects the plasma concentration of 5 neuroactive steroids (cortisol, estradiol, progesterone, testosterone, and 3α-androstenediol glucuronide). Second, we studied if levels of circulating steroids associate with neurological, cognitive, and functional outcome in a cohort of 60- to 90 year-old male and female patients with AIS. For this purpose, we recruited patients who were hospitalized at the Emergency Room of the Central Military Hospital within the first 24 h after stroke onset. We designed 2 experimental groups, each one composed of 30 control subjects and 30 AIS patients, both males and females. The assessment of neurological deficit was performed with the NIHSS and the tests used for the functional and cognitive status were: (1) modified Rankin Scale; (2) Photo test, and (3) abbreviated Pfeiffer's mental status questionnaire. We observed a significant difference in plasma concentration of cortisol and estradiol between both experimental groups. In the AIS group, higher levels of these neuroactive steroids were associated with more pronounced neurological, cognitive and functional deficits in women compared to men. We propose that in elderly patients, high levels of circulating neuroactive steroids like cortisol and estradiol could potentiate AIS-mediated neuropathology in the ischemic and penumbra areas.


Assuntos
Androstenodióis/sangue , Isquemia Encefálica/sangue , Cognição/fisiologia , Hormônios Esteroides Gonadais/sangue , Hidrocortisona/sangue , Acidente Vascular Cerebral , Idoso , Idoso de 80 Anos ou mais , Isquemia Encefálica/diagnóstico , Isquemia Encefálica/fisiopatologia , Isquemia Encefálica/psicologia , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neurotransmissores/sangue , Prognóstico , Recuperação de Função Fisiológica , Acidente Vascular Cerebral/sangue , Acidente Vascular Cerebral/diagnóstico , Acidente Vascular Cerebral/fisiopatologia , Acidente Vascular Cerebral/psicologia
3.
Nutrients ; 13(12)2021 Dec 20.
Artigo em Inglês | MEDLINE | ID: mdl-34960119

RESUMO

Red meat (RM) consumption is correlated with multiple health outcomes. This study aims to identify potential biomarkers of RM consumption in the Chinese population and evaluate their predictive ability. We selected 500 adults who participated in the 2015 China Health and Nutrition Survey and examined their overall metabolome differences by RM consumption by using elastic-net regression, then evaluate the predictivity of a combination of filtered metabolites; 1108 metabolites were detected. In the long-term RM consumption analysis 12,13-DiHOME, androstenediol (3α, 17α) monosulfate 2, and gamma-Glutamyl-2-aminobutyrate were positively associated, 2-naphthol sulfate and S-methylcysteine were negatively associated with long-term high RM consumption, the combination of metabolites prediction model evaluated by area under the receiver operating characteristic curve (AUC) was 70.4% (95% CI: 59.9-80.9%). In the short-term RM consumption analysis, asparagine, 4-hydroxyproline, and 3-hydroxyisobutyrate were positively associated, behenoyl sphingomyelin (d18:1/22:0) was negatively associated with short-term high RM consumption. Combination prediction model AUC was 75.6% (95% CI: 65.5-85.6%). We identified 10 and 11 serum metabolites that differed according to LT and ST RM consumption which mainly involved branch-chained amino acids, arginine and proline, urea cycle and polyunsaturated fatty acid metabolism. These metabolites may become a mediator of some chronic diseases among high RM consumers and provide new evidence for RM biomarkers.


Assuntos
Aminoácidos/sangue , Lipídeos/sangue , Metabolômica/métodos , Carne Vermelha/estatística & dados numéricos , Adulto , Aminobutiratos/sangue , Androstenodióis/sangue , Povo Asiático , Biomarcadores/sangue , China/epidemiologia , Cisteína/análogos & derivados , Cisteína/sangue , Dieta/métodos , Ácidos Graxos Insaturados/metabolismo , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Curva ROC , Carne Vermelha/efeitos adversos , Ésteres do Ácido Sulfúrico/sangue , Inquéritos e Questionários
4.
Steroids ; 73(7): 751-9, 2008 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-18423786

RESUMO

19-Nor-4-androstenediol is a prohormone of nandrolone. Both substances are included in the WADA list of prohibited classes of substances. The aim of this study is to determine the plasma levels of 19-nor-4-androstenediol and its metabolites after oral administration of a nutritional supplement containing the drug. Two capsules of Norandrodiol Select 300 were orally administered to six healthy male volunteers. Plasma samples were collected up to 24h. Samples were extracted to obtain free and glucuronoconjugated metabolic fractions. Trimethylsilyl derivatives of both fractions were analyzed by gas chromatography coupled to mass spectrometry (GC-MS). The method was validated to determine linearity, extraction recovery, limit of detection and quantification, intra- and inter-day precision and accuracy. After administration of 19-nor-4-androstenediol, the main metabolites detected were norandrosterone and noretiocholanolone, mainly in the glucuronide fraction. Nandrolone, norandrostenedione and 19-nor-4-androstenediol were also detected at lower concentrations.


Assuntos
Androstenodióis/sangue , Cromatografia Gasosa-Espectrometria de Massas , Administração Oral , Adulto , Androstenodióis/administração & dosagem , Androstenodióis/metabolismo , Androstenodióis/farmacocinética , Suplementos Nutricionais , Humanos , Masculino , Nandrolona/sangue , Sensibilidade e Especificidade , Detecção do Abuso de Substâncias
5.
J Clin Invest ; 58(3): 579-89, 1976 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-182723

RESUMO

Aldosterone receptors from rat kidney slices were utilized in a competitive binding technique to analyze the contribution of various steroids to plasma "mineralocorticoid" activity and to assess their possible role in hypertension. To consider simultaneously the plasma binding, steroids were incubated with slices in undiluted plasma; competitor activities for [3H]aldosterone binding were aldosterone, 100%; deoxycorticosterone, 16.2%; cortisol, 0.4%; and 18-hydroxy-deoxy-corticosterone and d18-hydroxy-corticosterone, 0.1%. These steroids were more active in buffer than plasma, suggesting that they bind to plasma and that this reduces their receptor binding. Analysis of the competition data suggests that at normal plasma concentrations, aldosterone occupies the receptors to a major extent, cortisol occupies some of the receptors, and deoxycorticosterone and 8-hydroxydeoxycorticosterone contribute little to receptor occupancy. Two steroids implicated in low-renin essential hypertension, 16beta-hydroxy-dehydro-epiandrosterone and 16-oxoandrostenediol, did not have significant competitor activity. Competitor activity in plasmas from normal subjects taken at 12 noon (upright) was greater than that in those taken at 8 a.m. (supine). Since the 12 noon samples had higher aldosterone and lower cortisol levels than the 8 a.m. samples, the competitor activity under these physiological circumstances reflects aldosterone more than cortisol. The competitor activities of plasmas from patients relative to normal subjects (100+/-12.1%; mean+/-SEM) were: normal renin "essential" hypertension, 117+/-14%; low-renin essential hypertension, 101+/-6.6%; and primary aldosteronism, 176+/-14.3%. Thus a significant increase in activity of steroids that interact with mineralocorticoid receptors was detected in primary aldosteronism (P LESS THAN 0.01) BUT WAS NOT DETECTED IN LOW-RENIN OR NORMAL-RENIN ESSENTIAL HYPERTENSION.


Assuntos
Aldosterona/metabolismo , Hipertensão/sangue , Mineralocorticoides/sangue , Receptores de Superfície Celular , Androstenodióis/sangue , Androstenodióis/farmacologia , Animais , Ligação Competitiva , Corticosterona/análogos & derivados , Corticosterona/sangue , Corticosterona/farmacologia , Depressão Química , Desoxicorticosterona/sangue , Desoxicorticosterona/farmacologia , Hidrocortisona/sangue , Hidrocortisona/farmacologia , Postura , Ratos , Fatores de Tempo
6.
J Clin Endocrinol Metab ; 53(2): 394-400, 1981 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-6265489

RESUMO

Congenital adrenal hyperplasia due to 3 beta-ol-hydroxysteroid dehydrogenase (3 beta-ol) deficiency is usually lethal. A partial deficiency in 3 beta-ol has been suggested in some women presenting with androgen excess. In this study, 24 women were investigated who had hirsutism and oligomenorrhea and high serum delta 5 androgens compared to delta 4 androgens. Of these women, 9 had significantly elevated 17-hydroxypregnenolone (17 Preg) to 17-hydroxyprogesterone (17 Prog) ratios when compared to controls under basal conditions. On further testing of 9 women with ACTH, 4 had significantly elevated 17 Preg to 17 Prog ratios. Eight women had elevated ratios of dehydroepiandrosterone sulfate to androstenedione, 4 had elevations of androstenediol (Adiol) to testosterone (T), and 4 had abnormal 17 Preg to cortisol ratios. Only 3 women out of the original 24 selected for study had elevated ratios for all 4 different steroid pairs measured. 17 Prog was normal in these women with 3 beta-ol deficiency in contradistinction to the high levels normally observed in women with congenital adrenal hyperplasia due to 21- or 11-hydroxylase deficiency. It is suggested that the cause of androgen excess in these women is high circulating levels of Adiol and, in part, the slightly elevated unbound T levels in these women. In conclusion, a subtle, incomplete form of 3 beta-ol deficiency may exist in adult women and is manifest by high delta 5 androgens such as dehydroepiandrosterone sulfate and Adiol and normal delta 4 androgens such as androstenedione and T.


Assuntos
17-alfa-Hidroxipregnenolona/sangue , 3-Hidroxiesteroide Desidrogenases/deficiência , Androstenodiol/sangue , Androstenodióis/sangue , Desidroepiandrosterona/análogos & derivados , Hirsutismo/sangue , Hormônio Adrenocorticotrópico , Adulto , Desidroepiandrosterona/sangue , Sulfato de Desidroepiandrosterona , Dexametasona , Feminino , Hirsutismo/etiologia , Humanos , Cinética , Oligomenorreia/sangue , Síndrome do Ovário Policístico/diagnóstico
7.
J Clin Endocrinol Metab ; 48(1): 139-42, 1979 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-154525

RESUMO

This report describes aggregate time trend effects of advancing gestational age on circulating maternal concentrations of 17beta-estradiol (E2), estriol (E3), dehydroepiandrosterone (D), dehydroepiandrosterone sulfate (D-S), delta 5-androstenediol (delta 5 diol), delta 4-androstenedione (delta 4 A), testosterone (T), and dihydrotestosterone (DHT) in a sequential series of 155 blood samples obtained from 19 normal pregnant women ranging from 26-40 weeks gestational age. Only E2, E3, and D-S show aggregate time trend effects. Log (E2) plots as a linear positive sloping curve from 26-40 weeks. Log (E3) plots as a positive sloping curve that is significantly steeper than log (E2) (P less than 0.05). Log (D-S) plots into a negative sloping curve which mirrors the pattern for log (E2) but cannot be statistically associated with log (E2) except for the opposite sign of their slopes, which are both significantly different from a zero slope (P less than 0.05). delta 4 A, T, DHT, delta 5 diol, and D show no aggregate time trends; however wide, comoving undulations for delta 4 A, T, DHT, and delta 5 diol between 26-28 and 38-40 weeks are confirmed in time by comparison of log mean plots and in magnitude by regressing the C19 steroids on one another. D shows virtually no association with the other C19 steroids. All C19 steroids, except for T, circulate at nonpregnant concentrations, implying that there is little placental secretion of these steroids into the maternal circulation.


Assuntos
Androgênios/sangue , Estrogênios/sangue , Hormônios Esteroides Gonadais/sangue , Terceiro Trimestre da Gravidez , Androstenodióis/sangue , Androstenodiona/sangue , Desidroepiandrosterona/sangue , Di-Hidrotestosterona/sangue , Estradiol/sangue , Estriol/sangue , Feminino , Humanos , Gravidez , Testosterona/sangue
8.
J Clin Endocrinol Metab ; 56(6): 1209-13, 1983 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-6841558

RESUMO

We have measured the total (cytosolic plus nuclear) androgen binding capacity of pubic skin fibroblasts from nine patients with hirsutism of various origin. Confluent intact cell monolayers were incubated with increasing concentrations (0.05-2 nM) of [3H]dihydrotestosterone ([3H]DHT) with or without a 200-fold excess of unlabeled DHT. The androgen binding capacities (mean +/- SD) were similar in normal men (411 +/- 171 fmol/mg DNA), women (310 +/- 103 fmol/mg DNA), and hirsute patients (313 +/- 141 fmol/mg DNA) regardless of the plasma androgen levels. In contrast, the 5 alpha-reductase level in pubic skin fibroblasts (mean +/- SD) was, as previously described, higher in hirsute women (3.3 +/- 2.6 fmol/micrograms DNA . h) than in normal women (1.1 +/- 0.6 fmol/microgram DNA . h; P less than 0.05). We conclude from these data that: 1) increased androgen binding capacity cannot be held responsible for hypersensitivity to androgens in hirsutism; 2) the androgen receptor is not regulated by androgens in human skin, as similar levels are observed in men, women, and hirsute patients; 3) this contrasts with 5 alpha-reductase activity and emphasizes the importance of this enzyme as an amplifier of androgen action in areas where it is stimulated by androgens, such as pubic skin.


Assuntos
3-Oxo-5-alfa-Esteroide 4-Desidrogenase/metabolismo , Androgênios/metabolismo , Hirsutismo/metabolismo , Oxirredutases/metabolismo , Receptores Androgênicos/metabolismo , Receptores de Esteroides/metabolismo , Pele/enzimologia , Adolescente , Adulto , Androstenodióis/sangue , Feminino , Humanos , Masculino , Ligação Proteica , Fatores Sexuais , Testosterona/sangue
9.
J Clin Endocrinol Metab ; 43(3): 561-70, 1976 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-182711

RESUMO

The acute and chronic effects of estradiol (E2) on the serum levels of four delta5,3-beta hydroxysteroids and their four delta4, 3-keto products were studied in four ovariectomized women with and without adrenal stimulation by ACTH. Six hour infusions of saline and of synthetic 1-24 ACTH were administered and later repeated with a two hour infusion of E2 50 mug/h. The patients were then given 50 mug of ethinyl estradiol (EE2) p.o. for 4 to 6 weeks and the control and ACTH infusions were again repeated. Levels of pregnenolone3 (Pe), 17alpha-hydroxypregnenolone (17 Pe), progesterone (Po), 17alpha-hydroxyprogesterone (17 Po), dehydroepiandrosterone (DHEA), androstenedione (Adione), androstenediol (Adiol), and testosterone (T), as well as cortisol and DHEA-sulfate were measured by radioimmunoassay on serum samples taken at 1200 and 1300 h. There was no significant effect of E2 or EE2 in the doses administered with or without exogenous ACTH on 3 betaOHSD activity as reflected in absolute steroid levels or in the ratio of concentrations of each delta5:delta4 steroid pair. During the 4th and 5th hour of ACTH infusion, the plasma level of 17 Pe (mean 22.5-fold stimulation) was most elevated, followed by 17 Po (12.5-fold), Pe (10-fold), cortisol (5.9-fold) and Po (4.5-fold), with smaller increases for the other steroids. These results, as well as the pattern of change in plasma levels in one of the subjects in whom fifteen minute samples were measured, provide further evidence suggesting that the major pathway for cortisol biosynthesis in vivo proceeds from Pe via 17 Pe, and not via Po.


Assuntos
Glândulas Suprarrenais/enzimologia , Castração , Estradiol/farmacologia , Hidroxiesteroide Desidrogenases/metabolismo , 17-alfa-Hidroxipregnenolona/sangue , Glândulas Suprarrenais/efeitos dos fármacos , Hormônio Adrenocorticotrópico/farmacologia , Adulto , Androstenodióis/sangue , Androstenodiona/sangue , Desidroepiandrosterona/sangue , Feminino , Humanos , Hidrocortisona/sangue , Hidroxiprogesteronas/sangue , Pregnenolona/sangue , Progesterona/sangue , Testosterona/sangue
10.
Obstet Gynecol ; 48(2): 150-4, 1976 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-133306

RESUMO

Serum levels of cortisol (F), pregnenolone (delta5-P), 17-hydroxypregnenolone (17-delta5-P), dehydroepiandrosterone (DHEA), dehydroepiandrosterone sulfate (DHEA-S), progesterone (P), 17-hydroxyprogesterone (17-P), androstenedione (A), testosterone (T), dihydrotestosterone (DHT), androst-5-ene-3beta, 17beta-diol (delta5-diol), estrone (E1), and estradiol-17beta (E2) were measured in 10 postmenopausal and 5 premenopausal women before (control) and after 7 days of Dexamethasone (post-dex). Control and post-dex levels of delta5-P, P, DHT, T, and F were not different (P greater than 0.05) in premenopausal versus postmenopausal women, while the control levels of 17-P, DHEA, DHEA-S, A, delta5-diol, and E2 were lower in the postmenopausal women (P less than 0.05). Assuming post-dex levels equal ovarian contribution, the ovarian contribution of 17-delta5-P, 17-P, DHEA, delta5-diol, A, E1, and E2 and the adrenal contribution (control-post-dex) to DHEA, DHEA-S, 17-P, A, and delta5-diol was significantly lower (P less than 0.05) in postmenopausal subjects.


Assuntos
Corticosteroides/sangue , Androgênios/sangue , Estrogênios/sangue , Menopausa , Idoso , Androstenodióis/sangue , Androstenodiona/sangue , Desidroepiandrosterona/sangue , Dexametasona/farmacologia , Estradiol/sangue , Estrona/sangue , Feminino , Humanos , Hidrocortisona/sangue , Pessoa de Meia-Idade , Pregnenolona/sangue , Progesterona/sangue , Testosterona/sangue
11.
Obstet Gynecol ; 53(1): 111-5, 1979 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-215946

RESUMO

The peripheral levels of 17-hydroxypregnenolone (17delta5P), progesterone (P), 17-hydroxyprogesterone (17P), testosterone (T), 5alpha-dihydrotestosterone (DHT), androstenedione (A), androst-5-ene-3beta,17beta-diol (delts5diol), dehydroepiandrosterone (DHEA), dehydroepiandrosterone sulfate (DHEA-S), estradiol-17beta (E2), and cortisol (F) were measured in peripheral and right adrenal venous blood of an amenorrheic patient with a right virilizing adrenal adenoma. Urinary 17-ketosteroids were markedly elevated and were not suppressed on a low dose of dexamethasone (Dex) for 7 days. Peripheral T level was 1.2 ng/ml and DHEA-S was 13,500 ng/ml. Calculations of the ratios of adrenal venous gradients for delta5 and delta4 steroids suggest that the predominant pathway of steroid secretion used by the tumor was as follows: pregnenolone (delta5P) leads to 17delta5P leads to DHEA leads to A leads to T. Following removal of the adenoma, T returned to normal levels but DHEA-S was still above normal at 4100 ng/ml. The patient became eumenorrheic with marked improvement at her hirsutism and virilization.


Assuntos
17-Hidroxicorticosteroides/sangue , Adenoma/sangue , Neoplasias das Glândulas Suprarrenais/sangue , Androstanos/sangue , Hormônios Esteroides Gonadais/sangue , 17-alfa-Hidroxipregnenolona/sangue , Adenoma/metabolismo , Adolescente , Neoplasias das Glândulas Suprarrenais/metabolismo , Glândulas Suprarrenais/irrigação sanguínea , Androstenodióis/sangue , Androstenodiona/sangue , Desidroepiandrosterona/sangue , Di-Hidrotestosterona/sangue , Estradiol/sangue , Feminino , Humanos , Hidrocortisona/sangue , Hidroxiprogesteronas/sangue , Testosterona/sangue , Veias
12.
Obstet Gynecol ; 53(1): 36-43, 1979 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-215947

RESUMO

The ovarian-peripheral gradients of various delta4 and delta5 steroids were determined for a patient with virilizing arrhenoblastoma. The high peripheral testosterone level accompanying this tumor results from increased precursor supply from both the delta4 and delta5 pathways, with the delta5 pathway predominating, and from negligible aromatase activity. A review of 45 cases of androgen-producing ovarian tumors with measurement of peripheral venous testosterone, and of 24 cases with measurement of ovarian venous testosterone, and a comparison with findings in 159 patients with hirsutism of functional origin reveal the following 1) An androgen-producing tumor must be ruled out when peripheral testosterone exceeds 2 ng/ml; 2) an ovarian venous testosterone level exceeding 20 ng/ml generally accompanies a tumor, particularly when the tumor is less than 5 cm in diameter; and 3) virtually all (98%) of the tumors reviewed were accompanied by virilization, regardless of the peripheral concentration of testosterone.


Assuntos
17-Hidroxicorticosteroides/sangue , Androstanos/sangue , Hormônios Esteroides Gonadais/sangue , Neoplasias Ovarianas/sangue , Ovário/irrigação sanguínea , Tumor de Células de Sertoli-Leydig/sangue , 17-Hidroxicorticosteroides/biossíntese , 17-alfa-Hidroxipregnenolona/sangue , Androstanos/biossíntese , Androstenodióis/sangue , Androstenodiona/sangue , Desidroepiandrosterona/sangue , Di-Hidrotestosterona/sangue , Estradiol/sangue , Feminino , Hormônios Esteroides Gonadais/biossíntese , Humanos , Hidrocortisona/sangue , Pessoa de Meia-Idade , Progesterona/sangue , Testosterona/sangue , Veias
13.
Clin Biochem ; 13(3): 126-8, 1980 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-6448110

RESUMO

Plasma levels of dehydroepiandrosterone sulfate, dehydroepiandrosterone and delta 5-androstenediol were measured in several women throughout pregnancy. The levels of both dehydroepiandrosterone and its sulfate decreased while those of delta 5-androstenediol did not. The levels of binding of the latter steroid to plasma proteins increased.


Assuntos
Androstenodiol/sangue , Androstenodióis/sangue , Desidroepiandrosterona/sangue , Gravidez , Adulto , Feminino , Humanos
14.
Steroids ; 30(1): 53-60, 1977 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-919016

RESUMO

A reliable radioimmunoassay for the determination of 5-androstene-3beta, 17beta-diol in plasma is described. Antisera were obtained by immunization of rabbits with 3beta, 17beta-dihydroxy-5-androsten-16-one coupled to bovine serum albumin in position 16. The antiserum was characterized by titer, affinity, and specificity. Only dehydroepiandrosterone (24.3 percent) and pregnenolone (2.7 percent) showed a small cross-reactivity. The assay method consisted of extraction with ether, thin-layer chromatography and endpoint determination. The reliability of the method was studied. The interassay variability was 7.5 percent at a concentration of 1.22 microgram/l. The limit of detection was 0.068 microgram/l. Specificity was achieved by chromatographic separation of the crossreacting steroids. Mass recovery experiments with 250 and 500 pg were performed, in which 99.0 + or - 4.6 percent of the smaller and 97.6 +/- 11.3 percent of the greater mass were recovered. In 45 healthy adult males plasma concentrations between 0.44 and 1.80 microgram/l were found. The median was 1.06 microgram/l. Stimulation of the Leydig cells with human chorionic gonadotropin (HCG) increased plasma concentrations by 93 percent (average in 12 males). Thereapeutic castration in 8 men caused an average decrease of 55.4 percent in plasma values.


Assuntos
Androstenodiol/sangue , Androstenodióis/sangue , Adulto , Androstenodiol/imunologia , Especificidade de Anticorpos , Castração , Gonadotropina Coriônica/farmacologia , Humanos , Masculino , Pessoa de Meia-Idade , Radioimunoensaio
15.
Steroids ; 28(2): 179-96, 1976 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-973234

RESUMO

A simple method is described for the simultaneous radioligand assay of four delta5-3beta-hydroxysteroids adjacent to one another on the biosynthetic pathway (pregnenolone [1], 17alpha-hydroxypregnenolone, dehydroepiandrosterone and 5-androsterone-3beta, 17beta-diol), and their four delta4-3keto products (progesterone, 17alpha-hydroxyprogesterone, 4-androstene-3, 17-dione and testosterone). Two plasma aliquots are extracted and fractionated each for four steroids and individual corrections are made for losses. For fractionation, maximum use is made of the high resolution and reproducibility of celite minicolumns, using propylene glycol as stationary phase, and a discontinuous gradient of ethyl acetate in iso-octane as mobile phase. The fractions are then assayed in the appropriate radioligand end-assay system. Each assay was finally validated by demonstrating coincidence of peaks of immuno- and radioactive steroid in extracts of female plasma. Results in pre-pubertal girls and women in the follicular phase of the menstrual cycle suggest that the major change in adrenal steroid production at puberty may be an increase in 17, 20-desmolase activity. There appears to be little reversal of this change in adrenal function after ovariectomy.


Assuntos
Hidroxiesteroides/sangue , Cetosteroides/sangue , Adulto , Fatores Etários , Androstenodióis/sangue , Sítios de Ligação , Proteínas Sanguíneas , Criança , Feminino , Humanos , Ligação Proteica , Puberdade , Ensaio Radioligante/métodos
16.
Artigo em Inglês | MEDLINE | ID: mdl-14552823

RESUMO

A simple method for simultaneous determination of androstenediol 3-sulfate (Adiol-3S) and dehydroepiandrosterone sulfate (DHEA-S) in human serum using isotope diluted liquid chromatography-electrospray ionization-ion trap-mass spectrometry (LC-ESI-ion trap-MS) was developed. After addition of deuterated internal standards ([2H5]Adiol-3S and [2H4]DHEA-S), human serum (100 microl) was deproteinized with acetonitrile and then applied to a solid-phase extraction cartridge, Oasis HLB. The obtained steroid sulfates fraction was washed with hexane and then analyzed by LC-ESI-MS operated in the negative ion mode. The quantification ranges of Adiol-3S and DHEA-S were 10-400 ng/ml and 0.05-8 microg/ml, respectively. The method does not require the chemical or enzymatic hydrolysis of the conjugates and purification with high-performance liquid chromatography, and shows satisfactory reproducibility and accuracy. The concentrations of these sulfates in the sera of healthy male volunteers (n=14) were 19.2-245.3 mg/ml (Adiol-3S) and 0.175-5.16 microg/ml (DHEA-S), and those of patients with prostate cancer (n=19) were 15.3-182.7 ng/ml (Adiol-3S; four samples, not detectable) and 0.110-2.421 microg/ml (DHEA-S).


Assuntos
Androstenodióis/sangue , Sulfato de Desidroepiandrosterona/sangue , Espectrometria de Massas por Ionização por Electrospray/métodos , Idoso , Idoso de 80 Anos ou mais , Calibragem , Estudos de Casos e Controles , Humanos , Masculino , Neoplasias da Próstata/sangue , Reprodutibilidade dos Testes
17.
Arch Dermatol Res ; 266(2): 181-5, 1979 Oct.
Artigo em Alemão | MEDLINE | ID: mdl-160776

RESUMO

In the plasma of psoriatics and controls the steroids dehydroepiandrosterone and 5-androstene-3 beta, 17 beta-diol were determined by radioimmunoassay. Corresponding earlier findings obtained by photometric methods in psoriatics the plasma level of dehydroepiandrosterone is increased and that of androstenediol is decreased.


Assuntos
Androstenodióis/sangue , Desidroepiandrosterona/sangue , Psoríase/sangue , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Radioimunoensaio
18.
Ann Ist Super Sanita ; 11(1-2): 129-35, 1975.
Artigo em Italiano | MEDLINE | ID: mdl-183580

RESUMO

The measurement of androgen hormones in reduced times using small samples of blood is nowadays possible by using the radioimmunological techniques. The level of testosterone in plasma is directly correlated with glandular secretion, though several different factors may provoke variations of such level. The measurement of testosterone in plasma is used for evaluation of testicular function. The main applications of testosterone determination in clinical practice are reported; special stress is laid on diagnosis on male hypogonadisms and on the study of testicular function in male sexual impotence.


PIP: New radioimmunological techniques have made it possible to measure androgens and other sex hormones in small samples of blood. Concentrations of steroids measured in the spermatic vein and in the arm vein show that testosterone has the highest concentration, followed by androstenedione. Measurement of testosterone can be used to evaluate the testicular function; however, several factors may provoke variations of its level, such as old age, physical stress, and even position of the body. The study of male hypogonadism can be helped by determination of testosterone levels; not so male impotence, which has mostly, a psychological rather than a pathological etiology.


Assuntos
Androgênios/sangue , Hormônio Adrenocorticotrópico/sangue , Androgênios/biossíntese , Androstenodióis/sangue , Androstenodiona/sangue , Desidroepiandrosterona/sangue , Disfunção Erétil/sangue , Humanos , Hidrocortisona/sangue , Síndrome de Klinefelter/sangue , Masculino , Radioimunoensaio , Testículo/metabolismo , Testosterona/sangue
19.
Artigo em Francês | MEDLINE | ID: mdl-6268696

RESUMO

Luteoma in pregnancy is a rare tumour (about 100 published cases) and it is rarely associated with signs of virilisation (28 published cases). A visiting luteoma in pregnancy in primigravid woman of 27 years of age is reported and compared with other cases in the literature. A study of the androgen secretions before and after pregnancy and especially the levels of androgens in the peripheral blood, the ovarian vein and in the tumour ware carried out so that metabolic pathways of the production of the androgens could be worked out. The particular circumstances of the unexpected appearance of this luteoma during an H.C.G. stimulation test (Human Chorionic Gonadotrophin) gives an opportunity to define the role of this hormone in its occurrence. Finally, a review of the literature makes it possible to draw up a history of the usual behaviour of these virilising luteomas in pregnancy: they usually show up in the second trimester of pregnancy, and the overriding role is played by testosterone with virilisation of female fetuses.


Assuntos
Neoplasias Ovarianas/fisiopatologia , Complicações na Gravidez/fisiopatologia , Tumor da Célula Tecal/fisiopatologia , Virilismo/etiologia , Adulto , Androstenodióis/sangue , Di-Hidrotestosterona/sangue , Estradiol/sangue , Feminino , Humanos , Neoplasias Ovarianas/metabolismo , Neoplasias Ovarianas/cirurgia , Gravidez , Primeiro Trimestre da Gravidez , Progesterona/sangue , Testosterona/sangue , Tumor da Célula Tecal/metabolismo , Tumor da Célula Tecal/cirurgia
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