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serum metabolites

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https://www.readbyqxmd.com/read/28645021/development-a-validated-highly-sensitive-lc-ms-ms-method-for-simultaneous-quantification-of-ledipasvir-sofosbuvir-and-its-major-metabolite-gs-331007-in-human-plasma-application-to-a-human-pharmacokinetic-study
#1
Ola M Abdallah, Ahmed M Abdel-Megied, Amira S Gouda
A highly sensitive and rapid LC-MS/MS method was developed, fully optimized and validated for the simultaneous determination of Ledipasvir (LED) and Sofosbuvir (SOF) in the presence of its major metabolite GS-331007 in human plasma using Daclatasvir as internal standard (IS). The extraction of analytes and IS from plasma was performed using liquid-liquid extraction with ethyl acetate. The chromatographic separation of these prepared samples was achieved on Xterra MS C8 column (4.6×50mm,5μm) using gradient elution with a mobile phase of ammonium formate buffer (pH 3...
June 20, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28644367/oral-cholic-acid-is-efficacious-and-well-tolerated-in-patients-with-bile-acid-synthesis-and-zellweger-spectrum-disorders
#2
James E Heubi, Kevin E Bove, Kenneth D R Setchell
BACKGROUND/AIMS: Patients with bile acid synthesis disorders (BASD) due to single enzyme defects (SED) or Zellweger spectrum disorders (ZSD) accumulate hepatotoxic atypical bile acids resulting in potentially fatal progressive liver disease. We evaluated the efficacy and safety of oral cholic acid in patients with BASD. METHODS: In this phase 3, open-label, single-arm, nonrandomized, noncomparative study conducted over 18 years, patients were administered cholic acid orally 10 to 15 mg/kg/day...
June 21, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28642310/metabolomics-analysis-identifies-sex-associated-metabotypes-of-oxidative-stress-and-the-autotaxin-lysopa-axis-in%C3%A2-copd
#3
Shama Naz, Johan Kolmert, Mingxing Yang, Stacey N Reinke, Muhammad Anas Kamleh, Stuart Snowden, Tina Heyder, Bettina Levänen, David J Erle, C Magnus Sköld, Åsa M Wheelock, Craig E Wheelock
Chronic obstructive pulmonary disease (COPD) is a heterogeneous disease and a leading cause of mortality and morbidity worldwide. The aim of this study was to investigate the sex dependency of circulating metabolic profiles in COPD.Serum from healthy never-smokers (healthy), smokers with normal lung function (smokers), and smokers with COPD (COPD; Global Initiative for Chronic Obstructive Lung Disease stages I-II/A-B) from the Karolinska COSMIC cohort (n=116) was analysed using our nontargeted liquid chromatography-high resolution mass spectrometry metabolomics platform...
June 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28641781/pregnancy-to-postpartum-transition-of-serum-metabolites-in-women-with-gestational-diabetes
#4
Elin Chorell, Ulrika Andersson Hall, Carolina Gustavsson, Kerstin Berntorp, Jatta Puhkala, Riitta Luoto, Tommy Olsson, Agneta Holmäng
CONTEXT: Gestational diabetes is commonly linked to development of type 2 diabetes mellitus (T2DM). There is a need to characterize metabolic changes associated with gestational diabetes in order to find novel biomarkers for T2DM. OBJECTIVE: To find potential pathophysiological mechanisms and markers for progression from gestational diabetes mellitus to T2DM by studying the metabolic transition from pregnancy to postpartum. DESIGN: The metabolic transition profile from pregnancy to postpartum was characterized in 56 women by mass spectrometry-based metabolomics; 11 women had gestational diabetes mellitus, 24 had normal glucose tolerance, and 21 were normoglycaemic but at increased risk for gestational diabetes mellitus...
July 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28640652/protective-effect-against-brain-tissues-oxidative-damage-as-a-possible-mechanism-for-beneficial-effects-of-l-arginine-on-lipopolysaccharide-induced-memory-impairment-in-rats
#5
Mahmoud Hosseini, Akbar Anaeigoudari, Farimah Beheshti, Mohammad Soukhtanloo, Reza Nosratabadi
L-Arginine (LA) and nitric oxide (NO) have been suggested to have some effects on learning, memory, brain tissues oxidative damage, and neuroinflammation. In this study, protective effect against brain tissues oxidative damage as a possible mechanism for beneficial effects of LA on lipopolysaccharide (LPS) induced memory impairment was investigated. The rats were grouped into and treated by (1) control (saline), (2) LPS (1 mg/kg, IP), (3) LA (200 mg/kg) - LPS (4) LA. In passive avoidance (PA) test, LPS administration shortened the latency to enter the dark compartment in LPS group compared to control (p < ...
June 22, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/28640361/global-and-targeted-serum-metabolic-profiling-of-colorectal-cancer-progression
#6
Yin Long, Beatriz Sanchez-Espiridion, Moubin Lin, Lindsey White, Lopa Mishra, Gottumakkala S Raju, Scott Kopetz, Cathy Eng, Michelle A T Hildebrandt, David W Chang, Yuanqing Ye, Dong Liang, Xifeng Wu
BACKGROUND: Patients with colorectal adenoma polyps (PLPs) are at higher risk for developing colorectal cancer (CRC). However, the development of improved and robust biomarkers to enable the screening, surveillance, and early detection of PLPs and CRC continues to be a challenge. The aim of this study was to identify biomarkers of progression to CRC through metabolomic profiling of human serum samples with a multistage approach. METHODS: Metabolomic profiling was conducted with the Metabolon platform for 30 CRC patients, 30 PLP patients, and 30 control subjects, and this was followed by the targeted validation of the top metabolites in an additional set of 50 CRC patients, 50 PLP patients, and 50 controls with liquid chromatography-tandem mass spectrometry...
June 22, 2017: Cancer
https://www.readbyqxmd.com/read/28640223/non-targeted-metabolomics-analysis-of-the-effects-of-tyrosine-kinase-inhibitors-sunitinib-and-erlotinib-on-heart-muscle-liver-and-serum-metabolism-in-vivo
#7
Brian C Jensen, Traci L Parry, Wei Huang, Amro Ilaiwy, James R Bain, Michael J Muehlbauer, Sara K O'Neal, Cam Patterson, Gary L Johnson, Monte S Willis
Background: More than 90 tyrosine kinases have been implicated in the pathogenesis of malignant transformation and tumor angiogenesis. Tyrosine kinase inhibitors (TKIs) have emerged as effective therapies in treating cancer by exploiting this kinase dependency. The TKI erlotinib targets the epidermal growth factor receptor (EGFR), whereas sunitinib targets primarily vascular endothelial growth factor receptor (VEGFR) and platelet-derived growth factor receptor (PDGFR).TKIs that impact the function of non-malignant cells and have on- and off-target toxicities, including cardiotoxicities...
June 22, 2017: Metabolites
https://www.readbyqxmd.com/read/28639229/pharmacokinetics-of-mhaa4549a-an-anti-influenza-a-monoclonal-antibody-in-healthy-subjects-challenged-with-influenza%C3%A2-a-virus-in-a-phase-iia-randomized-trial
#8
Rong Deng, Ai Ping Lee, Mauricio Maia, Jeremy J Lim, Tracy Burgess, Priscilla Horn, Michael A Derby, Elizabeth Newton, Jorge A Tavel, William D Hanley
BACKGROUND AND OBJECTIVES: MHAA4549A, a human anti-influenza immunoglobulin (Ig) G1 monoclonal antibody, is being developed to treat patients hospitalized for influenza A infection. This study examined the pharmacokinetics (PKs) of MHAA4549A in a phase IIa, randomized, double-blind, dose-ranging trial in healthy volunteers challenged with influenza A virus. METHODS: Serum PK data were collected from 60 subjects in three single-dose groups (400, 1200, or 3600 mg) who received MHAA4549A intravenously 24-36 h after inoculation with the influenza A virus...
June 21, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28638229/dietary-and-metabolomic-determinants-of-relapse-in-ulcerative-colitis-patients-a-pilot-prospective-cohort-study
#9
Ammar Hassanzadeh Keshteli, Floris F van den Brand, Karen L Madsen, Rupasri Mandal, Rosica Valcheva, Karen I Kroeker, Beomsoo Han, Rhonda C Bell, Janis Cole, Thomas Hoevers, David S Wishart, Richard N Fedorak, Levinus A Dieleman
AIM: To identify demographic, clinical, metabolomic, and lifestyle related predictors of relapse in adult ulcerative colitis (UC) patients. METHODS: In this prospective pilot study, UC patients in clinical remission were recruited and followed-up at 12 mo to assess a clinical relapse, or not. At baseline information on demographic and clinical parameters was collected. Serum and urine samples were collected for analysis of metabolomic assays using a combined direct infusion/liquid chromatography tandem mass spectrometry and nuclear magnetic resolution spectroscopy...
June 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28638207/effect-of-clonazepam-co-administered-with-clozapine-on-the-serum-clozapine-and-norclozapine-concentration-of-patients-with-schizophrenia-a-retrospective-survey
#10
Ping Jiang, Zhiguang Lin, Yi Jin, Juanjuan Ren, Hongmei Liu, Huiru Cui, Jijun Wang, Chunbo Li
BACKGROUND: For patients with schizophrenia clozapine (CLZ) is sometimes co-prescribed with clonazepam (CLNAZ). However, the impact of administration of CLZ along with CLNAZ on the serum concentration of CLZ and its major metabolite N-CLZ in schizophrenia is not well understood. AIM: To investigate the effects of CLNAZ co-medication, patient gender, age and CLZ dosage on serum concentration of CLZ and norclozapine (N-CLZ) in individuals with schizophrenia. METHODS: Serum CLZ and N-CLZ concentrations and demographic data were retrospectively analyzed for 341 patients with schizophrenia...
December 25, 2016: Shanghai Archives of Psychiatry
https://www.readbyqxmd.com/read/28637889/targeted-metabolomics-demonstrates-distinct-and-overlapping-maternal-metabolites-associated-with-bmi-glucose-and-insulin-sensitivity-during-pregnancy-across-four-ancestry-groups
#11
Saya Jacob, Michael Nodzenski, Anna C Reisetter, James R Bain, Michael J Muehlbauer, Robert D Stevens, Olga R Ilkayeva, Lynn P Lowe, Boyd E Metzger, Christopher B Newgard, Denise M Scholtens, William L Lowe
OBJECTIVE: We used targeted metabolomics in pregnant mothers to compare maternal metabolite associations with maternal BMI, glycemia, and insulin sensitivity. RESEARCH DESIGN AND METHODS: Targeted metabolomic assays of clinical metabolites, amino acids, and acylcarnitines were performed on fasting and 1-h postglucose serum samples from European ancestry, Afro-Caribbean, Thai, and Mexican American mothers (400 from each ancestry group) who participated in the Hyperglycemia and Adverse Pregnancy Outcome (HAPO) Study and underwent an oral glucose tolerance test at ∼28 weeks gestation...
July 2017: Diabetes Care
https://www.readbyqxmd.com/read/28637888/maternal-bmi-and-glycemia-impact-the-fetal-metabolome
#12
William L Lowe, James R Bain, Michael Nodzenski, Anna C Reisetter, Michael J Muehlbauer, Robert D Stevens, Olga R Ilkayeva, Lynn P Lowe, Boyd E Metzger, Christopher B Newgard, Denise M Scholtens
OBJECTIVE: We used targeted metabolomics to determine associations of maternal BMI and glucose levels with cord blood metabolites and associations of cord blood metabolites with newborn birth weight and adiposity in mother-offspring dyads. RESEARCH DESIGN AND METHODS: Targeted metabolomic assays were performed on cord blood serum samples from European ancestry, Afro-Caribbean, Thai, and Mexican American newborns (400 from each ancestry group) whose mothers participated in the Hyperglycemia and Adverse Pregnancy Outcome (HAPO) Study and who had anthropometric measurements at birth...
July 2017: Diabetes Care
https://www.readbyqxmd.com/read/28637499/diagnostic-relevance-of-urinary-steroid-profiles-on-ovarian-granulosa-cell-tumors-two-case-reports
#13
Anita Bufa, Nelli Farkas, Zsolt Preisz, Viktória Poór, Csilla Páger, Sándor Szukits, Bálint Farkas, Péter Miklós Gőcze
BACKGROUND: Granulosa cell tumor of the ovary is the most frequent sex cord stromal tumor and represents 2 to 5% of all primary ovarian cancers. Ovarian granulosa cell tumor is a malignant tumor with slow progression and in some cases this tumor is hormonally active. The recurrence of granulosa cell tumor often happens after 5 years. CASE PRESENTATION: We describe two cases of postmenopausal women with adult-type granulosa cell tumors of the ovary. Patient 1 is a 49-year-old European woman with a recurrent tumor; patient 2 is a 55-year-old European woman without recurrence of tumor...
June 22, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28637469/impact-of-phthalate-and-bpa-exposure-during-in-utero-windows-of-susceptibility-on-reproductive-hormones-and-sexual-maturation-in-peripubertal-males
#14
Deborah J Watkins, Brisa N Sánchez, Martha Maria Téllez-Rojo, Joyce M Lee, Adriana Mercado-García, Clara Blank-Goldenberg, Karen E Peterson, John D Meeker
BACKGROUND: Phthalates and BPA are endocrine disrupting chemicals (EDCs) widely used in consumer products. Evidence suggests that phthalate and BPA exposure alters steroid hormone levels in adults, while in utero exposure has been associated with altered fetal reproductive development in boys. However, the impact of exposure during distinct critical windows of in utero development on hormone concentrations and sexual maturation during the pubertal transition has not been examined. The objective of this study was to assess trimester-specific in utero phthalate and BPA exposure in relation to measures of reproductive development among peripubertal boys in a Mexico City birth cohort...
June 21, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28633682/effect-of-space-allowance-and-floor-type-on-performance-welfare-and-physiological-measurements-of-finishing-beef-heifers
#15
M P Keane, M McGee, E G O'Riordan, A K Kelly, B Earley
Accommodating cattle indoors during the winter is widely practiced throughout Europe. There is currently no legislation surrounding the space allowance and floor type that should be provided to cattle during this time, however, concerns have been raised regarding the type of housing systems currently in use. The objective of the study was to investigate the effect of space allowance and floor type on performance and welfare of finishing beef heifers. Continental crossbred heifers (n=240: mean initial live; weight, 504 (SD 35...
June 21, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28632728/downregulation-of-serum-metabolite-gta-446-as-a-novel-potential-marker-for-early-detection-of-colorectal-cancer
#16
Tsuyoshi Hata, Ichiro Takemasa, Hidekazu Takahashi, Naotsugu Haraguchi, Junichi Nishimura, Taishi Hata, Tsunekazu Mizushima, Yuichiro Doki, Masaki Mori
BACKGROUND: We previously reported that GTA-446 may be a useful biomarker for early detection of colorectal cancer. In the present study, we confirmed the clinical feasibility of GTA-446 as a screening tool for colorectal cancer with a novel measurement system developed for clinical use. We also improved sensitivity by analysing GTA-446 levels according to gender. METHODS: Serum samples were collected from 225 colorectal cancer patients and 916 healthy volunteers to measure GTA-446 levels by flow injection analysis-mass spectrometry...
June 20, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28630872/effect-of-regular-aerobic-activity-in-young-healthy-athletes-on-profile-of-endothelial-function-and-platelet-activity
#17
Katarzyna Podgórska, Arkadiusz Derkacz, Ewa Szahidewicz-Krupska, Jakub Jasiczek, Piotr Dobrowolski, Aneta Radziwon-Balicka, Robert Skomro, Andrzej Szuba, Grzegorz Mazur, Adrian Doroszko
The aim of the study was to assess the impact of regular professional sports activity on the endothelial and platelet function in young men. The studied group were 79 young men (18-40 y, 25 athletes and 54 without any regular physical activity). The nitric oxide (NO) metabolic pathway intermediates, oxidative stress markers, mediators of inflammation, and platelet aggregation were measured. Flow mediated dilation (FMD) was studied before and after intravenous 16,0 g L-arginine infusion, which was repeated after oral administration of acetylsalicylic acid (ASA-75 mg/day) for 4 days...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28629946/phytol-induced-pathology-in-2-hydroxyacyl-coa-lyase-hacl1-deficient-mice-evidence-for-a-second-non-hacl1-related-lyase
#18
Serena Mezzar, Evelyn De Schryver, Stanny Asselberghs, Els Meyhi, Petruta L Morvay, Myriam Baes, Paul P Van Veldhoven
2-Hydroxyacyl-CoA lyase (HACL1) is a key enzyme of the peroxisomal α-oxidation of phytanic acid. To better understand its role in health and disease, a mouse model lacking HACL1 was investigated. Under normal conditions, these mice did not display a particular phenotype. However, upon dietary administration of phytol, phytanic acid accumulated in tissues, mainly in liver and serum of KO mice. As a consequence of phytanic acid (or a metabolite) toxicity, KO mice displayed a significant weight loss, absence of abdominal white adipose tissue, enlarged and mottled liver and reduced hepatic glycogen and triglycerides...
June 16, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28629624/the-protective-role-of-oestradiol-against-silent-myocardial-ischemia-and-hypertension-risk-in-south-african-men-the-sabpa-study
#19
Nicolaas T Malan, Roland von Känel, Hendrik S Steyn, Ruan Kruger, Leoné Malan
BACKGROUND: Oestradiol has a protective effect on coronary artery health in women but the effect it has on men, is controversial. A translational approach was followed to assess whether sex hormone levels are associated with silent myocardial ischemia (SMI) and hypertension risk over a 3year period. METHODS: Participants included 89 Black and 91 White men (aged 21-63years) participating in both phases of the Sympathetic activity and Ambulatory Blood Pressure in Africans prospective study...
June 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28628970/a-randomized-double-blind-clinical-study-on-blood-pressure-reduction-and-blood-lipid-profile-amelioration-on-treatment-with-ankascin-568
#20
Chien-Li Chen, Jen-Ho Tseng, Tzu-Ming Pan, Sheng-Huang Hsiao
Hypertension and cardiovascular complications are the leading causes of death worldwide. Antihypertensive drugs often cause various side effects, and improper use of antihypertensive medications can result in irreparable damage. Edible fungi of the Monascus species have been used as traditional Chinese medicines in Southeast Asia for several centuries. The fermented products of Monascus purpureus NTU 568 (ANKASCIN 568) possess a number of functional secondary metabolites including the anti-inflammatory pigments monascin and ankaflavin...
June 30, 2017: Chinese Journal of Physiology
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