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https://www.readbyqxmd.com/read/28533331/chronic-stimulation-of-renin-cells-leads-to-vascular-pathology
#1
Masafumi Oka, Silvia Medrano, Maria Luisa S Sequeira-Lόpez, R Ariel Gómez
Experimental or spontaneous genomic mutations of the renin-angiotensin system or its pharmacological inhibition in early life leads to renal abnormalities, including poorly developed renal medulla, papillary atrophy, hydronephrosis, inability to concentrate the urine, polyuria, polydipsia, renal failure, and anemia. At the core of such complex phenotype is the presence of unique vascular abnormalities: the renal arterioles do not branch or elongate properly and they have disorganized, concentric hypertrophy...
May 22, 2017: Hypertension
https://www.readbyqxmd.com/read/28532150/synephrine-as-a-specific-marker-for-orange-consumption
#2
Matthias Bader, Tatjana Lang, Roman Lang, Thomas Hofmann
To validate the suitability of synephrine, known as a highly abundant alkaloid in oranges, as a dietary biomarker for orange consumption, a highly sensitive and robust stable isotope dilution analysis (SIDA) as well as an ECHO method, using the analyte itself as a pseudo-internal standard injected into the analysis run providing an "echo peak" of the analyte, was developed to quantitate synephrine by LC-MS/MS in citrus juices and human urine before and after ingestion of orange juice. A citrus juice screening revealed high synephrine concentrations of 150 to 420 nmol/mL in orange (n=11) and tangerine juices (n=2), while 20 to 100 times lower levels were found in juice from grapefruit (n=14), lemon (n=5) and lime (n=4), respectively...
May 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28531847/colorimetric-detection-of-biothiols-based-on-aggregation-of-chitosan-stabilized-silver-nanoparticles
#3
Somayeh Mohammadi, Gholamreza Khayatian
We have described a simple and reliable colorimetric method for the sensing of biothiols such as cysteine, homocysteine, and glutathione in biological samples. The selective binding of chitosan capped silver nanoparticles to biothiols induced aggregation of the chitosan-Ag NPs. But the other amino acids that do not have thiol group cannot aggregate the chitosan-Ag NPs. Aggregation of chitosan-Ag NPs has been confirmed with UV-vis absorption spectra, zeta potential and transmission electron microscopy images...
May 17, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28531801/ace-2-ang1-7-mas-cascade-mediates-ace-inhibitor-captopril-protective-effects-in-estrogen-deficient-osteoporotic-rats
#4
Hatem M Abuohashish, Mohammed M Ahmed, Dina Sabry, Mahmoud M Khattab, Salim S Al-Rejaie
The local role of the renin angiotensin system (RAS) was documented recently beside its conventional systemic functions. Studies showed that the effector angiotensin II (AngII) alters bone health, while inhibition of the angiotensin converting enzyme (ACE-1) preserved these effects. The newly identified Ang1-7 exerts numerous beneficial effects opposing the AngII. Thus, the current study examines the role of Ang1-7 in mediating the osteo-preservative effects of ACEI (captopril) through the G-protein coupled Mas receptor using an ovariectomized (OVX) rat model of osteoporosis...
May 19, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28531643/lipid-based-nutrient-supplements-containing-vitamins-and-minerals-attenuate-renal-electrolyte-loss-in-hiv-aids-patients-starting-antiretroviral-therapy-a-randomized-controlled-trial-in-zambia
#5
D Munkombwe, T L Muungo, C Michelo, P Kelly, S Chirwa, S Filteau
BACKGROUND & AIMS: Advanced HIV infection combined with undernutrition and antiretroviral therapy (ART) places HIV/AIDS patients at high risk of electrolyte abnormalities and increased morbidity and mortality. Here, in a sub-study of a large published randomized trial, we evaluated if nutritional supplements will help curtail renal electrolyte loss in HIV/AIDS patients starting ART. METHODS: 130 malnourished HIV-positive patients referred for ART received lipid-based nutrient supplements alone (LNS, n = 63) or together with vitamins and minerals (LNS-VM, n = 67)...
June 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28528955/potential-therapeutic-activity-of-phlogacanthus-thyrsiformis-hardow-mabb-flower-extract-and-its-biofabricated-silver-nanoparticles-against-chemically-induced-urolithiasis-in-male-wistar-rats
#6
Poppy Das, Kiran Kumar, Arunai Nambiraj, Reshma Rajan, Rajendra Awasthi, Kamal Dua, Himaja M
Urolithiasis is a painful disorder in which stones are formed in the kidney, bladder or urethra. There are no proper therapeutic treatments available for kidney stones and people suffering from larger stones have to undergo surgery which has many side effects. A natural remedy with therapeutic effects that can dissipate and remove even the larger stones would eliminate the need of a surgery and the risks associated with it. The flowers of Phlogacanthus thyrsiformis used in culinary recipes in the north eastern India are also widely used as a folklore medicine for the treatment of kidney stones and liver disorders...
May 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28527511/accumulation-of-biomass-and-four-triterpenoids-in-two-stage-cultured-poria-cocos-mycelia-and-diuretic-activity-in-rats
#7
Gao-Sheng Hu, Chong-Gui Huang, Yang Zhang, Wei Xiao, Jing-Ming Jia
Poria cocos (Schw.) Wolf, an important medicinal and food fungus, is well known in East Asia. Due to growing market demand, long cultivation period, and consumption of pine trunk during cultivation, developing alternative methods for producing P. cocos and/or its active components is of interest. In the present study, the effects of different culture methods on biomass and accumulation of four triterpenoids were investigated. The ethanol extract of fermented mycelium (EFM) was orally administered to rats. Urine output and concentrations of electrolytes (Na(+), K(+), and Cl(-)) were measured...
April 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/28527332/determination-of-parabens-in-human-urine-by-optimal-ultrasound-assisted-emulsification-microextraction-and-on-line-acetylation-gas-chromatography-mass-spectrometry
#8
Zhou Hui-Ting, Erica M C Ding, Wang-Hsien Ding
An effective and solvent-less method for the rapid determination of four commonly detected parabens (methyl-, ethyl-, propyl- and butyl-) in human urine samples is described. This method employed ultrasound-assisted emulsification microextraction (USAEME) before identification and quantitation of the parabens via on-line acetylation gas chromatography-mass spectrometry (GC-MS). Urine samples were enzymatically de-conjugated with β-glucuronidase and then extracted by an optimal USAEME procedure for the measurement of total concentrations of target analytes...
May 10, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28527194/biodistribution-and-excretion-of-colloidal-gold-nanoparticles-after-intravenous-injection-effects-of-particle-size
#9
Issei Takeuchi, Sho Nobata, Naoto Oiri, Keishiro Tomoda, Kimiko Makino
BACKGROUND: Inorganic gold nanoparticles (NPs) have a huge potential in targeted drug delivery. Simple preparation and surface modification procedure with their special physicochemical properties of gold NPs attract their use such as tumor targeting and the detection of cancerous cell. OBJECTIVE: Various studies were reported, however, details of biodistribution profile of gold NPs were not enough evaluated. We have studied biodistribution profile of gold NPs having various particle sizes (20, 50 and 100 nm)...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28526941/urinary-cadmium-and-cotinine-levels-and-hair-mercury-levels-in-czech-children-and-their-mothers-within-the-framework-of-the-cophes-democophes-projects
#10
Kateřina Forysová, Anna Pinkr-Grafnetterová, Marek Malý, Andrea Krsková, Jaroslav Mráz, Lucie Kašparová, Mája Čejchanová, Lenka Sochorová, Sylva Rödlová, Milena Černá
The COPHES/DEMOCOPHES twin project was performed in 2011-2012 in 17 European countries to harmonize all steps of the human biomonitoring survey. Urinary cadmium, cotinine, phthalate metabolites, and hair mercury were measured in children (N = 120, 6-11 years) and their mothers of reproductive age, living in urban or rural areas. Cadmium in mothers' and children's urine was detected at a geometric mean (GM) concentration 0.227 and 0.109 μg/L, respectively; 95th percentile (P95) was 0.655 and 0.280 μg/L in mothers and children, respectively...
May 19, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28526821/influence-of-soil-moisture-on-codenitrification-fluxes-from-a-urea-affected-pasture-soil
#11
Timothy J Clough, Gary J Lanigan, Cecile A M de Klein, Md Sainur Samad, Sergio E Morales, David Rex, Lars R Bakken, Charlotte Johns, Leo M Condron, Jim Grant, Karl G Richards
Intensively managed agricultural pastures contribute to N2O and N2 fluxes resulting in detrimental environmental outcomes and poor N use efficiency, respectively. Besides nitrification, nitrifier-denitrification and heterotrophic denitrification, alternative pathways such as codenitrification also contribute to emissions under ruminant urine-affected soil. However, information on codenitrification is sparse. The objectives of this experiment were to assess the effects of soil moisture and soil inorganic-N dynamics on the relative contributions of codenitrification and denitrification (heterotrophic denitrification) to the N2O and N2 fluxes under a simulated ruminant urine event...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526711/urine-concentration-should-be-taken-into-account-when-interpreting-pyuria-in-infants
#12
Shouja Alam, Judith van der Voort, Christopher C Butler
No abstract text is available yet for this article.
May 19, 2017: Evidence-based Medicine
https://www.readbyqxmd.com/read/28526030/prenatal-bisphenol-a-exposure-and-dysregulation-of-infant-hypothalamic-pituitary-adrenal-axis-function-findings-from-the-apron-cohort-study
#13
Gerald F Giesbrecht, Maede Ejaredar, Jiaying Liu, Jenna Thomas, Nicole Letourneau, Tavis Campbell, Jonathan W Martin, Deborah Dewey
BACKGROUND: Animal models show that prenatal bisphenol A (BPA) exposure leads to sexually dimorphic disruption of the neuroendocrine system in offspring, including the hypothalamic-pituitary-adrenal (HPA) neuroendocrine system, but human data are lacking. In humans, prenatal BPA exposure is associated with sex-specific behavioural problems in children, and HPA axis dysregulation may be a biological mechanism. The objective of the current study was to examine sex differences in associations between prenatal maternal urinary BPA concentration and HPA axis function in 3 month old infants...
May 19, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28525834/exposure-to-phenols-parabens-and-uv-filters-associations-with-loss-of-function-mutations-in-the-filaggrin-gene-in-men-from-the-general-population
#14
Ulla N Joensen, Niels Jørgensen, Jacob P Thyssen, Jørgen Holm Petersen, Pal B Szecsi, Steen Stender, Anne-Maria Andersson, Niels E Skakkebæk, Hanne Frederiksen
BACKGROUND: Filaggrin is an epidermal protein that is important for normal skin barrier functions. Up to 10% of Europeans and Asians carry filaggrin gene (FLG) loss-of function mutations that appear to facilitate trans-epidermal penetration of certain chemicals. We previously showed that mutation carriers have higher internal exposure to certain phthalates, compared to controls, and hypothesized that they could have increased trans-epidermal penetration of other chemicals. OBJECTIVES: We investigated exposure to non-persistent chemicals in young Danish men with and without FLG mutations...
May 16, 2017: Environment International
https://www.readbyqxmd.com/read/28525599/analytical-method-for-pyrethroid-metabolites-in-urine-of-the-non-occupationally-exposed-population-by-gas-chromatography-mass-spectrometry
#15
Toshiaki Yoshida
Pyrethroids are widely being used as household insecticides or mothproof repellents. An analytical method is described for determination of urinary metabolites as biomarkers for monitoring exposure to the pyrethroids. In total, 11 urinary metabolites, 3-(2-carboxyprop-1-enyl)-2,2-dimethylcyclopropanecarboxylic acid, 3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclopropanecarboxylic acid, 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylic acid, 4-fluoro-3-phenoxybenzoic acid, 4-methoxymethyl-2,3,5,6-tetrafluorobenzly alcohol, 2-methyl-3-phenylbenzoic acid, 4-methyl-2,3,5,6-tetrafluorobenzyl alcohol, 3-phenoxybenzoic acid, 2,3,5,6-tetrafluorobenzoic acid and 2,2,3,3-tetramethylcyclopropanecarboxylic acid, were enzymatically hydrolyzed and extracted with toluene...
May 19, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28524356/association-between-yap-expression-in-neoplastic-and-non-neoplastic-breast-tissue-with-arsenic-urinary-levels
#16
Gladis Michel-Ramirez, Rogelio Recio-Vega, Guadalupe Ocampo-Gomez, Eduardo Palacios-Sanchez, Manuel Delgado-Macias, Manuel Delgado-Gaona, Robert Clark Lantz, Jay Gandolfi, Tania Gonzalez-Cortes
The Hippo pathway regulates cell proliferation and apoptosis and it has been noted that loss of critical components of this pathway can lead to uncontrolled cell growth. Yes-associated protein (YAP) is an important component of this Hippo pathway because YAP is the nuclear effector of the Hippo tumor suppressor pathway and it is crucial for the response to oxidative stress induced by cellular process and by different xenobiotics, including arsenic. It has been proposed that YAP dysregulation can contribute to a malignant cellular phenotype acting as both a tumor suppressor and an oncogene...
May 19, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28523370/use-of-tolvaptan-vs-furosemide-in-older-patients-with-heart-failure-meta-analysis-of-randomized-controlled-trials
#17
W-L Huang, Y Yang, J Yang, J Yang, H-B Wang, X-L Xiong, Y-F Zhang
BACKGROUND: It is not known whether older patients with acute heart failure (HF) receiving tolvaptan have decreased mortality rates and a better long-term prognosis than patients who receive furosemide. We conducted a systematic review of randomized controlled trials (RCTs) to address this issue. METHODS: The Medline, Embase, and Cochrane Library databases were searched for English-language RCTs published before September 2016 comparing tolvaptan with furosemide treatment in older patients (>65 years old) after acute HF...
May 18, 2017: Herz
https://www.readbyqxmd.com/read/28522220/surgical-reconstruction-of-ruptured-anterior-cruciate-ligament-prolongs-trauma-induced-increase-of-inflammatory-cytokines-in-synovial-fluid-an-exploratory-analysis-in-the-kanon-trial
#18
Staffan Larsson, André Struglics, L Stefan Lohmander, Richard Frobell
OBJECTIVE: Prospectively monitor how treatment of acutely ruptured anterior cruciate ligament (ACL) affects biomarkers of inflammation and proteolytic degradation over five years. DESIGN: We studied 119 subjects with acute ACL injury from the randomized controlled KANON-trial (Clinical trial ISRCTN 84752559) who had synovial fluid, serum and urine samples available from at least two out of six visits over five years after acute ACL rupture. All subjects followed a similar rehabilitation protocol where, according to randomization, 60 also had early ACL reconstruction and 59 had the option to undergo a delayed ACL reconstruction if needed...
May 15, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28522103/urinary-biomarkers-and-obstructive-sleep-apnea-in-patients-with-down-syndrome
#19
Ibrahim Elsharkawi, David Gozal, Eric A Macklin, Lauren Voelz, Gil Weintraub, Brian G Skotko
STUDY OBJECTIVES: The study aimed to compare urinary biomarkers in patients with Down syndrome (DS) with and without obstructive sleep apnea (OSA) to those of age- and sex-matched neurotypically developing healthy controls (HC). We further investigated whether we could predict OSA in patients with DS using these biomarkers. METHODS: Urine samples were collected from 58 patients with DS the night before or the morning after their scheduled overnight polysomnogram or both, of whom 47 could be age- and sex-matched to a sample of 43 HC...
June 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28521190/simultaneous-determination-of-bisphenol-a-and-estrogens-in-hair-samples-by-liquid-chromatography-electrospray-tandem-mass-spectrometry
#20
Chaelin Lee, Chong Hyeak Kim, Sunghwan Kim, Sung-Hee Cho
Bisphenol A (BPA), an endocrine disrupter, is widely used to make chemicals for polycarbonate, plastics, beverage containers, epoxy resins, and cash register receipts. BPA is one of the known xenoestrogens, which have weak estrogenic activity and cause obesity, diabetes, breast cancer, and reproductive disorders. Even though the concentration level of metabolomes in hair is usually lower than that in urine and blood, there are several reasons why we chose to use hair samples. First, the sampling procedure of hairs is simple...
May 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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