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steroid profiling mass spectrometry

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https://www.readbyqxmd.com/read/29336082/metabolomics-study-of-cultivated-bulbus-fritillariae-cirrhosae-at-different-growth-stages-using-uhplc-qtof-ms-coupled-with-multivariate-data-analysis
#1
Zhao Geng, YiFei Liu, Yan Gou, QinMei Zhou, ChengJun He, Li Guo, Juan Zhou, Liang Xiong
INTRODUCTION: Bulbus fritillariae cirrhosae (known as Chuān bèi mǔ in China, BFC) contain fritillaria steroidal alkaloids as the bioactive ingredients and are widely used as traditional Chinese medicine for the treatment of cough and phlegm. Due to limited wild resources, the cultivated species are becoming predominantly used in Chinese traditional medicine markets. OBJECTIVE: To assess the impact of different growth stages on the alkaloids of cultivated BFC and establish a reference for quality control and guidance for appropriate harvesting practices...
January 15, 2018: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/29332424/salivary-metabolomics-profile-of-patients-with-recurrent-aphthous-ulcer-as-revealed-by-liquid-chromatography-tandem-mass-spectrometry
#2
Yantao Li, Daoming Wang, Chunwei Zeng, Yichen Liu, Guangyuan Huang, Zhanlong Mei
Objective We compared the salivary nontargeted metabolite profiles between patients with recurrent aphthous ulcer (RAU) and healthy individuals to investigate the metabolic alterations associated with RAU. Methods Saliva samples were collected from 45 patients with RAU and 49 healthy individuals, and the salivary metabolites were quantified using liquid chromatography-tandem mass spectrometry. The metabolomic profiles were then analyzed using multivariate and univariate statistical methods, and enrichment of the metabolites in various biological pathways was assessed...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29330226/mitotane-treatment-in-patients-with-metastatic-testicular-leydig-cell-tutor-associated-with-severe-androgen-excess
#3
Vasileios Chortis, Nicholas J Johal, Irina Bancos, Matthew Evans, Kassiani Skordilis, Peter Guest, Michael H Cullen, Emilio Porfiri, Wiebke Arlt
Mitotane (o,p'DDD) is established in the adjuvant and advanced stage treatment of adrenocortical carcinoma and counteracts both tumour growth and tumour-related steroid production. Both the adrenal glands and the gonads are steroidogenically active organs and share a common embryogenic origin. Here we describe the effects of mitotane in two patients with metastatic Leydig cell tumour (LCT) of the testes and associated severe androgen excess (serum testosterone 93 and 88 nmol/l, respectively; male reference range 7-27 nmol/L)...
January 12, 2018: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29278450/effect-of-glucocorticoid-administration-on-the-steroid-profile
#4
Sergi Coll, Xavier Matabosch, Lorena Garrostas, Clara Perez-Maña, Rosa Ventura
The steroid profile (SP) is a powerful tool to detect the misuse of endogenous anabolic androgenic steroids in sports, and it is included in the athlete biological passport (ABP). Glucocorticoids (GCs), which are widely prescribed in sports and are only prohibited in competition by systemic routes, inhibit the hypothalamic-pituitary-adrenal axis. Since the metabolites monitored in the SP have a partial adrenal origin, their excretion in urine might be altered by GCs consumption. The aim of the present work was to investigate if GCs administered by either systemic or local routes could influence the SP parameters...
December 26, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29226353/biotransformation-and-metabolic-profile-of-xian-ling-gu-bao-capsule-a-traditional-chinese-medicine-prescription-with-rat-intestinal-microflora-by-ultra-performance-liquid-chromatography-coupled-with-quadrupole-time-of-flight-tandem-mass-spectrometry-analysis
#5
Meng-Xue Gao, Xi-Yang Tang, Feng-Xiang Zhang, Zhi-Hong Yao, Xin-Sheng Yao, Yi Dai
Xian-Ling-Gu-Bao capsule (XLGB), a well-known traditional Chinese medicine prescription (TCMP), has been used for prevention and treatment of osteoporosis. The safety and efficacy of XLGB have been confirmed based on the principle of evidence-based medicine (EBM). XLGB is usually administered orally, after which its multi-components are brought into contacted with intestinal microflora in the alimentary tract and biotransformed. However, investigations on the comprehensive metabolic profile of XLGB are absent...
December 11, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29207196/high-resolution-metabolomics-determines-the-mode-of-onset-of-type-2-diabetes-in-a-3-year-prospective-cohort-study
#6
Yeseung Lee, Aryo Dimas Pamungkas, Carl Angelo D Medriano, Jinsung Park, Seri Hong, Sun Ha Jee, Youngja H Park
Type 2 diabetes mellitus (DM) is a progressive disease and the rate of progression from non-diabetes to DM varies considerably between individuals, ranging from a few months to many years. It is important to understand the mechanisms underlying the progression of diabetes. In the present study, a high-resolution metabolomics (HRM) analysis was performed to detect potential biomarkers and pathways regulating the mode of onset by comparing subjects who developed and did not develop type 2 DM at the second year in a 3-year prospective cohort study...
February 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29183656/unbiased-plasma-metabolomics-reveal-the-correlation-of-metabolic-pathways-and-prakritis-of-humans
#7
Amey Shirolkar, Sutapa Chakraborty, Tusharkanti Mandal, Rajesh Dabur
BACKGROUND: Ayurveda, an ancient Indian medicinal system, has categorized human body constitutions in three broad constitutional types (prakritis) i.e. Vata, Pitta and Kapha. OBJECTIVE: Analysis of plasma metabolites and related pathways to classify Prakriti specific dominant marker metabolites and metabolic pathways. MATERIALS AND METHODS: 38 healthy male individuals were assessed for dominant Prakritis and their fasting blood samples were collected...
November 25, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/29172026/effect-of-non-prohibited-drugs-on-the-phase-ii-metabolic-profile-of-morphine-an-in-vitro-investigation-for-doping-control-purposes
#8
Gabriella Ambrosio, Xavier de la Torre, Monica Mazzarino, Maria K Parr, Francesco Botrè
The potential consequences of drug-drug interaction on the strategies adopted by the anti-doping laboratories to report an adverse analytical finding for morphine were investigated. We have evaluated in vitro the effects of fourteen drugs on the principal metabolic pathways of morphine. The selected drugs are among those most commonly used by the athletes, none of them presently included in the World Anti-Doping Agency Prohibited List. The non-prohibited drugs included four antifungals (fluconazole, itraconazole, ketoconazole and miconazole), six benzodiazepines (alprazolam, bromazepam, clonazepam, lorazepam, lormetazepam and triazolam), and four non-steroidal anti-inflammatory drugs (diclofenac, ibuprofen, ketoprofen and nimesulide)...
November 24, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29163463/selective-glucocorticoid-receptor-properties-of-gsk866-analogs-with-cysteine-reactive-warheads
#9
Chandra S Chirumamilla, Ajay Palagani, Balu Kamaraj, Ken Declerck, Marinus W C Verbeek, Ryabtsova Oksana, Karolien De Bosscher, Nadia Bougarne, Bart Ruttens, Kris Gevaert, René Houtman, Winnok H De Vos, Jurgen Joossens, Pieter Van Der Veken, Koen Augustyns, Xaveer Van Ostade, Annemie Bogaerts, Hans De Winter, Wim Vanden Berghe
Synthetic glucocorticoids (GC) are the mainstay therapy for treatment of acute and chronic inflammatory disorders. Due to the high adverse effects associated with long-term use, GC pharmacology has focused since the nineties on more selective GC ligand-binding strategies, classified as selective glucocorticoid receptor (GR) agonists (SEGRAs) or selective glucocorticoid receptor modulators (SEGRMs). In the current study, GSK866 analogs with electrophilic covalent-binding warheads were developed with potential SEGRA properties to improve their clinical safety profile for long-lasting topical skin disease applications...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29092787/estradiol-metabolites-as-biomarkers-of-endometrial-cancer-prognosis-after-surgery
#10
Yannick Audet-Delage, Jean Grégoire, Patrick Caron, Véronique Turcotte, Marie Plante, Pierre Ayotte, David Simonyan, Lyne Villeneuve, Chantal Guillemette
Endometrial cancer (EC) is the most common gynecologic malignancy prevailing after menopause. Defining steroid profiles may help predict the risk of recurrence after hysterectomy, which remains limited due to the lack of reliable markers. Adrenal precursors, androgens, parent estrogens and catechol estrogen metabolites were measured by mass spectrometry (MS) in preoperative serums and those collected one month after hysterectomy from 246 newly diagnosed postmenopausal EC cases. We also examined the associations between steroid hormones and EC status by including 110 healthy postmenopausal women...
October 29, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29083134/clinical-endocrinology-and-hormones-quantitation-the-increasing-role-of-mass-spectrometry
#11
Federica D'Aurizio, Marco Cantù
Clinical endocrinology has always had a close relationship with laboratory medicine. In fact, the quantification of hormones is of great importance for diagnosis, treatment, recurrence and patient's prognosis of endocrine disorders. This review dealt with the role of the laboratory in diagnosing endocrine pathologies related to adrenal gland, pituitary, gonads and thyroid. The measurements of the main hormones (17- hydroxyprogesterone, androstenedione, dehydroepiandrosterone sulphate, testosterone, estradiol, cortisol, aldosterone, metanephrines, thyroglobulin and insulin-like-growth factor-1) were described considering analytical characteristics but also some aspects of pre-analytical and post- analytical steps...
October 27, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/29078043/doping-control-analysis-at-the-rio-2016-olympic-and-paralympic-games
#12
Henrique Marcelo Gualberto Pereira, Vinicius Figueiredo Sardela, Monica Costa Padilha, Luciana Mirotti, Alessandro Casilli, Fabio Azamor de Oliveira, Gustavo de Albuquerque Cavalcanti, Lucas Martins Lisandro Rodrigues, Amanda Lessa Dutra de Araujo, Rachel Santos Levy, Pedro Antonio Castelo Teixeira, Felipe Alves Gomes de Oliveira, Ana Carolina Giordani Duarte, Ana Carolina Dudenhoeffer Carneiro, Joseph Albert Medeiros Evaristo, Gustavo Ramalho Cardoso Dos Santos, Giovanni Carlo Verissimo da Costa, Fernando de Lima Castro, Fabio Cesar Sousa Nogueira, Fernanda Bertão Scalco, Luciana Pizzatti, Francisco Radler de Aquino Neto
This paper summarizes the results obtained from the doping control analyses performed during the Summer XXXI Olympic Games (from 03 to 21 August 2016) and XV Paralympic Games (from 07 to 18 September 2016). The analyses of all doping control samples were performed at the Brazilian Doping Control Laboratory (LBCD), a World Anti-Doping Agency (WADA)-accredited laboratory located in Rio de Janeiro, Brazil. A new facility at Rio de Janeiro Federal University (UFRJ) was built and fully operated by over seven hundred professionals, including Brazilian and international scientists, administrative staff and volunteers...
October 27, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29074860/steroid-hormone-profiling-in-obese-and-nonobese-women-with-polycystic-ovary-syndrome
#13
Yuying Deng, Yifei Zhang, Shengxian Li, Wenzhong Zhou, Lei Ye, Lihua Wang, Tao Tao, Junjie Gu, Zuwei Yang, Dandan Zhao, Weiqiong Gu, Jie Hong, Guang Ning, Wei Liu, Weiqing Wang
The study explored differences in the steroidogenic pathway between obese and nonobese women with polycystic ovary syndrome (PCOS) using liquid chromatography-tandem mass spectrometry (LC-MS/MS). 1044 women with PCOS (including 350 lean, 312 overweight and 382 obese) and 366 control women without PCOS (including 203 lean, 32 overweight and 131 obese) were enrolled. The differences in steroid hormones were amplified in lean PCOS versus lean controls compared with obese PCOS versus obese controls. Compared with obese PCOS, lean PCOS demonstrated increased dehydroepiandrosterone sulfate (P = 0...
October 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29072738/correlations-in-the-elemental-and-metabolic-profiles-of-the-lichen-dirinaria-picta-after-road-traffic-exposure
#14
Xulei Huang, Lei Wang, Anna Karen Carrasco Laserna, Sam Fong Yau Li
Lichens can be used as cost-effective biomonitors of elements from road traffic in the urban environment. However, the nature of comprehensive interactions between hazardous heavy metals from road traffic and lichen metabolites remains unclear. In this study, elemental and metabolic profiles of the lichen Dirinaria picta after exposure to road traffic for 3 months in 9 sites of Singapore city were investigated. Concentrations of 34 elements reveal strong correlations among each other and a general increase with traffic exposure level...
November 15, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29066529/steroidogenic-enzyme-activities-in-the-pre-and-post-parturient-equine-placenta
#15
Erin Lea Legacki, Cynthia Jo Corbin, Barry A Ball, Kirsten Scoggin, Scott D Stanley, Alan Conley
Steroidogenic enzymes in placentas shape steroid hormone profiles in the maternal circulation of each mammalian species. These include 3β-hydroxysteroid dehydrogenase/Δ5-4 isomerase (3βHSD) and 17α-hydroxylase/17,20-lyase cytochrome P450 (P450c17) crucial for progesterone and androgen synthesis, respectively, as well as aromatase cytochrome P450 (P450arom) that converts Δ4-androgens to estrogens. 5α-reductase is another important enzyme in equine placentas because 5α-dihydroprogesterone (DHP) sustains pregnancy in the absence of progesterone in the second half of equine pregnancy...
October 24, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29052403/-serum-metabonomics-in-mice-infected-with-mycoplasma-pneumoniae-by-uplc-q-tof-ms
#16
Wen-Feng Wei, Yan-Tao Chu, Ye Liu, Jin-Hai Huo, Wei-Ming Wang
Ultra high performance liquid chromatography coupled with tandem quadrupole time of flight mass spectrometry(UPLC-Q-TOF-MS) was applied to metabonomics study in BALB/c mice infected with mycoplasma pneumoniae(MP) to analyze the changes in serum endogenous metabolites, identify potential biomarkers associated with mycoplasma pneumoniae pneumonia(MPP), analyze the metabolic pathway and explore the pathogenic mechanism of MPP. The BALB/c mice were inoculated with MP by repeated intranasal infectious routes to establish MPP models, and the results of the lung tissue biopsy, IgM and mycoplasma nucleic acid content determination showed that the models of MP in BALB/c mice were successfully established...
April 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29039221/how-useful-is-urinary-free-cortisol-in-the-clinic
#17
Nisa Sheriff, Ann I McCormack
Measurement of 24-h urine-free cortisol is frequently employed as a first-line screening and disease-monitoring test in Cushing's syndrome (CS). The quest for 'cortisol specificity' has seen the emergence of mass spectrometry (MS) based assays, particularly liquid chromatography/tandem mass spectrometry. In contrast to traditional immunoassays, liquid chromatography/tandem mass spectrometry 'free cortisol' measurement is less susceptible to 'interference' from cortisol precursors and metabolites. However, detection of these conjugates is important in mild CS and therefore, missed by MS if cortisol alone is measured...
November 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/29034382/environmental-photochemistry-of-dienogest-phototransformation-to-estrogenic-products-and-increased-environmental-persistence-via-reversible-photohydration
#18
Nicholas C Pflug, Madeline K Hankard, Stephanie M Berg, Meghan O'Connor, James B Gloer, Edward P Kolodziej, David M Cwiertny, Kristine H Wammer
Potent trienone and dienone steroid hormones undergo a coupled photohydration (in light)-thermal dehydration (in dark) cycle that ultimately increases their environmental persistence. Here, we studied the photolysis of dienogest, a dienone progestin prescribed as a next-generation oral contraceptive, and used high resolution mass spectrometry and both 1D and 2D nuclear magnetic resonance spectroscopy to identify its phototransformation products. Dienogest undergoes rapid direct photolysis (t1/2 ∼ 1-10 min), forming complex photoproduct mixtures across the pH range examined (pH 2 to 7)...
November 15, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/29018346/comparative-analysis-of-compatibility-effects-on-invigorating-blood-circulation-for-cyperi-rhizoma-series-of-herb-pairs-using-untargeted-metabolomics
#19
Pei Liu, Er-Xin Shang, Yue Zhu, Jin-Gao Yu, Da-Wei Qian, Jin-Ao Duan
The mutual-assistance compatibility of Cyperi Rhizoma (Xiangfu, XF) and Angelicae Sinensis Radix (Danggui, DG), Chuanxiong Rhizoma (Chuanxiong, CX), Paeoniae Radix Alba (Baishao, BS), or Corydalis Rhizoma (Yanhusuo, YH), found in a traditional Chinese medicine (TCM) named Xiang-Fu-Si-Wu Decoction (XFSWD), can produce synergistic and promoting blood effects. Nowadays, XFSWD has been proved to be effective in activating blood circulation and dissipating blood stasis. However, the role of the herb pairs synergistic effects in the formula were poorly understood...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28986464/a-role-of-endogenous-progesterone-in-stroke-cerebroprotection-revealed-by-the-neural-specific-deletion-of-its-intracellular-receptors
#20
Xiaoyan Zhu, Magalie Fréchou, Philippe Liere, Shaodong Zhang, Antoine Pianos, Fernandez Neïké, Christian Denier, Claudia Mattern, Michael Schumacher, Rachida Guennoun
Treatment with progesterone protects the male and female brain against damage after middle cerebral artery occlusion (MCAO). However, in both sexes, the brain contains significant amounts of endogenous progesterone. It is not known whether endogenously produced progesterone enhances the resistance of the brain to ischemic insult. Here, we used steroid profiling by gas chromatography-tandem mass spectrometry (GC-MS/MS) for exploring adaptive and sex-specific changes in brain levels of progesterone and its metabolites after MCAO...
October 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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