keyword
MENU ▼
Read by QxMD icon Read
search

Androstenedione

keyword
https://www.readbyqxmd.com/read/29472137/synthesis-of-steroid-hormones-in-the-porcine-oviduct-during-early-pregnancy
#1
Marcin Martyniak, Anita Franczak, Genowefa Kotwica
Past studies of the oviducts have documented oviductal steroid production during the oestrous cycle in pigs. The present study examined whether the pig oviducts are the source of steroid hormones during early pregnancy. In the ampulla and isthmus, the expression of 3β-hydroxysteroid dehydrogenase (3βHSD) and aromatase cytochrome P450 (CYP19) mRNA by real-time PCR, cellular localization and quantities of the studied proteins by immunofluorescence and Western blot analysis, and concentration of steroid hormones in oviductal flushings by radioimmunoassay, were studied...
February 19, 2018: Reproductive Biology
https://www.readbyqxmd.com/read/29468906/quantification-of-10-steroid-hormones-in-human-saliva-from-chinese-adult-volunteers
#2
Jian Liu, Xuemei Qiu, Daoming Wang, Yantao Li, Yang Zong, Yichen Liu, Yue Zhang, Ping Yang, Yong Zuo, Huanming Yang, Jian Wang, Yutao Du, Jin Zi
Objective This study was performed to investigate the effects of age and sex on 10 salivary steroid hormones and analyze the correlations between salivary and plasma hormones. Methods The concentrations of 10 salivary steroid hormones in 1090 Chinese adult volunteers were examined using liquid chromatography-tandem mass spectrometry, and a related investigation was performed on the concentrations of salivary hormones in this population. Results The concentrations of androstenedione (A4), 17α-hydroxyprogesterone (17-OHP), aldosterone (ALD), cortisone (COR), corticosterone (CORT), cortisol (F), progesterone (P), and testosterone were significantly different between men and women (Student's t-test)...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29462095/hormonal-metabolic-and-endometrial-safety-of-testosterone-vaginal-cream-versus-estrogens-for-the-treatment-of-vulvovaginal-atrophy-in-postmenopausal-women-a-randomized-placebo-controlled-study
#3
Tatiane Fernandes, Adriana O Pedro, Luiz F Baccaro, Lucia H Costa-Paiva
OBJECTIVE: The aim of the study was to evaluate the laboratory and endometrial safety of topical testosterone versus topical estrogen for the treatment of vaginal atrophy in postmenopausal women. METHODS: This was a randomized, placebo-controlled trial of 60 postmenopausal women aged 40 to 70 years at the Menopause Clinic of CAISM UNICAMP. Women were randomized into three vaginal treatment groups: estrogen, testosterone, or placebo. The treatment was applied 3 times a week for 12 weeks...
February 16, 2018: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/29457756/effects-of-combined-oral-contraceptives-on-the-clinical-and-biochemical-parameters-of-hyperandrogenism-in-patients-with-polycystic-ovary-syndrome-a-systematic-review-and-meta-analysis
#4
Mina Amiri, Ali Kabir, Fatemeh Nahidi, Maryam Shekofteh, Fahimeh Ramezani Tehrani
INTRODUCTION: Nowadays, selection of COCs with maximum antiandrogenic effects is one the main issues in treatment of women with polycystic ovary syndrome (PCOS). OBJECTIVE: This systematic review and meta-analysis aimed to compare the effects of COCs on the clinical and biochemical parameters of hyperandrogenism (HA) in patients with PCOS. METHODS: Electronic databases (PubMed, Scopus, ScienceDirect and web of science) were searched from 1987 to November 2015 to identify clinical trials investigating effect of the various COCs on the clinical and biochemical parameters of HA in patients...
February 19, 2018: European Journal of Contraception & Reproductive Health Care
https://www.readbyqxmd.com/read/29455953/the-comprehensive-characterization-of-adrenocortical-steroidogenesis-using-two-dimensional-ultra-performance-liquid-chromatography-electrospray-ionization-tandem-mass-spectrometry
#5
Gellért Karvaly, Krisztián Kovács, Katalin Mészáros, Ibolya Kocsis, Attila Patócs, Barna Vásárhelyi
The perturbation of the homeostasis of adrenocortical steroids plays a fundamental role in several pathological conditions. Currently, only a few of the substances involved in steroidogenesis are routinely analysed in clinical laboratories for the diagnosis of these conditions. Recently, interest has grown over the development of clinical assays of endogenous steroids using liquid chromatography-tandem mass spectrometry (LC-MS/MS). However, no approaches have assessed the adrenocortical steroidogenesis comprehensively...
February 3, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29425789/refining-androstenedione-and-bisnorcholenaldehyde-from-mother-liquor-of-phytosterol-fermentation-using-macroporous-resin-column-chromatography-followed-by-crystallization
#6
Shi-Dong Xu, Fang-Hong Ning, Bang-He Jiang, Huan-Xin Xu, Zuo-Zhen Liu
Androstenedione is an androgen and intermediate in the biosynthesis of most adrenocortical, anabolic, sex and synthetic steroids, such as canrenone, eplerenone, norethindrone and spironolactone. Bisnorcholenaldehyde is an important intermediate in the synthesis of progesterone. This study established an androstenedione and bisnorcholenaldehyde separation method that used a macroporous adsorption resin and an ethanol-water mixture as eluent. The adsorption properties of 12 non-polar or weakly polar macroporous adsorption resins were compared, and three resins exhibited a high adsorption capacity and high desorption rate for both androstenedione and bisnorcholenaldehyde...
September 21, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29422438/effect-of-luteinizing-hormone-on-goat-theca-cell-apoptosis-and-steroidogenesis-through-activation-of-the-pi3k-akt-pathway
#7
Xiaomei Wang, Pengda Zou, Yuanyuan He, Kai Meng, Fusheng Quan, Yong Zhang
Luteinizing hormone (LH) is a glycoprotein that regulates the function of ovarian follicular cells. Theca cells (TCs) also have a key role in follicular growth and atresia. The effects and intracellular signaling mechanisms were investigated of LH on apoptosis and steroidogenesis in goat gonadotropin-independent follicular (1.0-4.0 mm) TCs. The results indicated that LH increased androstenedione secretion and relative abundance of CYP17A1 and BCL2 mRNA in the TCs, whereas LH in combination with LY294002, a PI3K/AKT inhibitor, decreased LH-induced function...
March 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29414008/analysis-by-lc-ms-ms-of-endogenous-steroids-from-human-serum-plasma-endometrium-and-endometriotic-tissue
#8
Merja R Häkkinen, Taija Heinosalo, Niina Saarinen, Tero Linnanen, Raimo Voutilainen, Timo Lakka, Jarmo Jääskeläinen, Matti Poutanen, Seppo Auriola
An LC-MS/MS method was developed and validated to analyze simultaneously estrogens (estradiol, E2; estrone, E1), androgens (testosterone, T; androstenedione, A4; dehydroepiandrosterone, DHEA), progestagens (17a-hydroxypregnenolone, 17OHP5; 17a-hydroxyprogesterone, 17OHP4; progesterone, P4), glucocorticoids (cortisol, F; cortisone E; corticosterone, B; 11-deoxycortisol, S; 21-hydroxyprogesterone, 21OHP4), and mineralocorticoids (aldosterone, A) from 150 μl of human serum, plasma, or endometrium and endometriotic tissue homogenates...
January 31, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29408955/high-androgens-in-postmenopausal-women-and-the-risk-for-atherosclerosis-and-cardiovascular-disease-the-rotterdam-study
#9
Cindy Meun, Oscar H Franco, Klodian Dhana, Loes Jaspers, Taulant Muka, Yvonne Louwers, M Arfan Ikram, Bart C J M Fauser, Maryam Kavousi, Joop S E Laven
Context: Polycystic ovary syndrome (PCOS) is closely linked to hyperandrogenism. In PCOS, hyperandrogenism has been associated with metabolic disturbances which increase the risk for cardiovascular disease (CVD). Objective: To assess the association of high serum androgen levels, as a postmenopausal remnant of PCOS, with the prevalence of atherosclerosis and incidence of CVD in postmenopausal women. Design: The Rotterdam Study, a prospective population-based cohort study...
February 1, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29408903/vitamin-d-deficiency-causes-inward-hypertrophic-remodeling-and-alters-vascular-reactivity-of-rat-cerebral-arterioles
#10
Éva Pál, Leila Hadjadj, Zoltán Fontányi, Anna Monori-Kiss, Zsuzsanna Mezei, Norbert Lippai, Attila Magyar, Andrea Heinzlmann, Gellért Karvaly, Emil Monos, György Nádasy, Zoltán Benyó, Szabolcs Várbíró
BACKGROUND AND PURPOSE: Vitamin D deficiency (VDD) is a global health problem, which can lead to several pathophysiological consequences including cardiovascular diseases. Its impact on the cerebrovascular system is not well understood. The goal of the present work was to examine the effects of VDD on the morphological, biomechanical and functional properties of cerebral arterioles. METHODS: Four-week-old male Wistar rats (n = 11 per group) were either fed with vitamin D deficient diet or received conventional rat chow with per os vitamin D supplementation...
2018: PloS One
https://www.readbyqxmd.com/read/29408743/tumor-necrosis-factor-alpha-versus-lh-and-androstendione-as-a-reliable-predictor-of-spontaneous-ovulation-after-laparoscopic-ovarian-drilling-for-women-with-clomiphene-citrate-resistance-polycystic-ovarian-disease
#11
Emaduldin Seyam, Enas Hefzy
OBJECTIVE: Laparoscopic ovarian drilling (LOD) is still a controversial decision; due to the long term hazards; so short and long term predictors after the procedure should be taken in consideration. The aim of this work was to investigate the role of the serum level of tumor necrosis factor alpha (TNF-α) and other polycystic ovarian disease (PCOD) relevant clinical and biochemical factors as a predictor of spontaneous ovulation after laparoscopic ovarian drilling (LOD) in women with clomiphene citrate resistant polycystic ovarian disease (CCR-PCOD)...
February 2, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29402482/taxifolin-suppresses-rat-and-human-testicular-androgen-biosynthetic-enzymes
#12
Fei Ge, Erpo Tian, Li Wang, Xiaoheng Li, Qiqi Zhu, Yiyan Wang, Ying Zhong, Ren-Shan Ge
Taxifolin is a flavonoid. It has been used as a chemopreventive agent and supplement. It may have some beneficial effects to treat prostate cancer by suppressing androgen production in Leydig cells. The objective of the present study was to study the effects of taxifolin on androgen production of rat Leydig cells isolated from immature testis and some rat and human testosterone biosynthetic enzyme activities. Rat Leydig cells were incubated with 100μM taxifolin without (basal) or with 10ng/ml luteinizing hormone (LH), 10mM 8-bromoadenosine 3',5'-cyclic monophosphate (8BR), and steroid enzyme substrates (20μM): 22R-hydroxychloesterol, pregnenolone, progesterone, and androstenedione...
February 2, 2018: Fitoterapia
https://www.readbyqxmd.com/read/29402198/the-essential-role-of-gata6-in-the-activation-of-estrogen-synthesis-in-endometriosis
#13
Lia A Bernardi, Matthew T Dyson, Hideki Tokunaga, Christia Sison, Muge Oral, Jared C Robins, Serdar E Bulun
Endometriotic stromal cells synthesize estradiol via the steroidogenic pathway. Nuclear receptor subfamily 5, group A, member 1 (NR5A1) is critical, but alone not sufficient, in activating this cascade that involves at least 5 genes. To evaluate whether another transcription factor is required for the activation of this pathway, we examined whether GATA Binding Protein 6 (GATA6) can transform a normal endometrial stromal cell (NoEM) into an endometriotic-like cell by conferring an estrogen-producing phenotype...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29391479/expression-of-steroidogenic-enzymes-and-metabolism-of-steroids-in-cos-7-cells-known-as-non-steroidogenic-cells
#14
Mitsuki Nozaki, Shogo Haraguchi, Takuro Miyazaki, Daichi Shigeta, Noriko Kano, Xiao-Feng Lei, Joo-Ri Kim-Kaneyama, Hiroyuki Minakata, Akira Miyazaki, Kazuyoshi Tsutsui
The COS-7 (CV-1 in Origin with SV40 genes) cells are known as non-steroidogenic cells because they are derived from kidney cells and the kidney is defined as a non-steroidogenic organ. Therefore, COS-7 cells are used for transfection experiments to analyze the actions of functional molecules including steroids. However, a preliminary study suggested that COS-7 cells metabolize [3H]testosterone to [3H]androstenedione. These results suggest that COS-7 cells are able to metabolize steroids. Therefore, the present study investigated the expression of steroidogenic enzymes and the metabolism of steroids in COS-7 cells...
February 1, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29385860/serum-mirnas-in-women-affected-by-hyperandrogenic-polycystic-ovary-syndrome-the-potential-role-of-mir-155-as-a-biomarker-for-monitoring-the-estroprogestinic-treatment
#15
Walter Arancio, Marco Calogero Amato, Miriam Magliozzo, Giuseppe Pizzolanti, Rosalia Vesco, Carla Giordano
MicroRNAs can be used as very efficient circulating biomarkers. The role of microRNAs in polycystic ovary syndrome (PCOS) and the effects of antiandrogen therapy on microRNA expression is still not fully understood. A panel of serum microRNAs were retrotranscribed via looped reverse primer transcription specific for each miRNA and quantified via probe specific RT-PCR in 16 Caucasian hyperandrogenic PCOS women selected according to the Rotterdam criteria and in a subset of seven patients after four months of sequential reverse antiandrogenic therapy...
January 31, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29374985/preptin-in-women-with-polycystic-ovary-syndrome
#16
Agata Mierzwicka, Justyna Kuliczkowska-Plaksej, Katarzyna Kolačkov, Marek Bolanowski
INTRODUCTION: Polycystic ovary syndrome (PCOS) patients, frequently develop metabolic complications, such as insulin resistance (IR), impaired carbohydrate metabolism, dyslipidemia, obesity. Among the new markers responsible for metabolic disorders, preptin seems to be of great significance. MATERIAL: One hundred and thirty-four women aged 17-45 were enrolled. PCOS was diagnosed in 73 women on the basis of ESHRE-ASRM criteria. Non-PCOS group consisted of 61 women with regular menstruation matched for nutritional status...
January 27, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29368340/serum-irisin-concentrations-in-lean-adolescents-with-polycystic-ovary-syndrome
#17
Flora Bacopoulou, Nikos Athanasopoulos, Vasiliki Efthymiou, Aimilia Mantzou, Leon Aravantinos, Spiros Vlahopoulos, Efthymios Deligeoroglou
OBJECTIVE: To explore differences in irisin concentrations between lean adolescents with PCOS and age- and body mass index (BMI)-matched controls and examine the associations of irisin with core features of the syndrome. DESIGN: Cross-sectional study. PATIENTS: Lean females with PCOS, aged 13-21 years. MEASUREMENTS: Physical, hormonal and sonographic assessment. Irisin concentrations were measured with ELISA. RESULTS: Participants included in total 39 sedentary females (mean±SD; age 17...
January 25, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29342266/causes-patterns-and-severity-of-androgen-excess-in-1205-consecutively-recruited-women
#18
Yasir S Elhassan, Jan Idkowiak, Karen Smith, Miriam Asia, Helena Gleeson, Rachel Webster, Wiebke Arlt, Michael W O'Reilly
Context: Androgen excess in women is predominantly due to underlying polycystic ovary syndrome (PCOS). However there is a lack of clarity regarding patterns and severity of androgen excess that should be considered predictive of non-PCOS pathology. Objective: We examined the diagnostic utility of simultaneous measurement of serum dehydroepiandrosterone sulfate (DHEAS), androstenedione (A4) and testosterone (T) to delineate biochemical signatures and cut-offs predictive of non-PCOS disorders in women with androgen excess...
January 12, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29339528/gonadal-function-in-adult-male-patients-with-congenital-adrenal-hyperplasia
#19
Manon Engels, Katharina Gehrmann, Henrik Falhammar, Emma A Webb, Anna Nordenstrom, Fred Sweep, Paul N Span, Antonius Eduard van Herwaarden, Julia Rohayem, Annette Richter-Unruh, Claire Bouvattier, Birgit Koehler, Barbara B Kortmann, Wiebke Arlt, Nel Roeleveld, Nicole Reisch, Nike Stikkelbroeck, Hedi L Claahsen-van der Grinten
CONTEXT: Current knowledge on gonadal function in Congenital Adrenal Hyperplasia (CAH) is mostly limited to single center/country studies enrolling small patient numbers. Overall data indicate that gonadal function can be compromised in men with CAH. OBJECTIVE: To determine gonadal function in men with CAH within the European "dsd-LIFE" cohort. DESIGN: Cross-sectional clinical outcome study, including retrospective data from medical records...
January 16, 2018: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29336269/design-synthesis-and-biological-evaluation-of-new-azole-derivatives-as-potent-aromatase-inhibitors-with-potential-effects-against-breast-cancer
#20
Farzin Hadizadeh, Fatemeh Kalalinia, Mohammad Jouya, Alireza Khorsand Komachal, Aboutourabzadeh Seyed Mohammad, Gholamreza Karimi, Javad Behravan, Khalil Abnous, Leila Etemad, Hossein Kamali
PURPOSE: Some aromatase inhibitors are FDA-approved agents as first-line therapy in the treatment of endocrine-responsive breast cancer. In this study, we aimed to develop new azole derivatives with higher specificity and potency. METHODS: New aromatase inhibitors were designed by Molecular Operating Environment (MOE) software and synthesized in a one-step SN2 reaction. These compounds were characterized by melting point, 1H- and 13C-NMR, elemental analysis and mass spectra...
January 15, 2018: Anti-cancer Agents in Medicinal Chemistry
keyword
keyword
16940
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"