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https://www.readbyqxmd.com/read/28640505/associations-between-arsenic-3-oxidation-state-methyltransferase-as3mt-and-n-6-adenine-specific-dna-methyltransferase-1-n6amt1-polymorphisms-arsenic-metabolism-and-cancer-risk-in-a-chilean-population
#1
Rosemarie de la Rosa, Craig Steinmaus, Nicholas K Akers, Lucia Conde, Catterina Ferreccio, David Kalman, Kevin R Zhang, Christine F Skibola, Allan H Smith, Luoping Zhang, Martyn T Smith
Inter-individual differences in arsenic metabolism have been linked to arsenic-related disease risks. Arsenic (+3) methyltransferase (AS3MT) is the primary enzyme involved in arsenic metabolism, and we previously demonstrated in vitro that N-6 adenine-specific DNA methyltransferase 1 (N6AMT1) also methylates the toxic inorganic arsenic (iAs) metabolite, monomethylarsonous acid (MMA), to the less toxic dimethylarsonic acid (DMA). Here, we evaluated whether AS3MT and N6AMT1 gene polymorphisms alter arsenic methylation and impact iAs-related cancer risks...
June 22, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/28638230/role-of-three-dimensional-endoanal-ultrasound-in-assessing-the-anal-sphincter-morphology-of-female-patients-with-chronic-proctalgia
#2
Ya-Hong Xue, Shu-Qing Ding, Yi-Jiang Ding, Li-Qun Pan
AIM: To assess the role of three-dimensional endoanal ultrasound (3D-EAUS) for morphological assessment of the anal sphincter of female patients with chronic proctalgia (CP). METHODS: In this unmatched case control study, 30 consecutive female patients with CP and 25 normal women (control group) were enrolled. 3D-EAUS was performed in all subjects. Thickness and length of internal anal sphincter (IAS), thickness of puborectalis muscle (PR), length of the external anal sphincter (EAS) plus PR, and puborectalis angle were measured and compared between the two groups...
June 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28630262/dipeptidyl-peptidase-4-inhibitor-anagliptin-prevents-intracranial-aneurysm-growth-by-suppressing-macrophage-infiltration-and-activation
#3
Taichi Ikedo, Manabu Minami, Hiroharu Kataoka, Kosuke Hayashi, Manabu Nagata, Risako Fujikawa, Sei Higuchi, Mika Yasui, Tomohiro Aoki, Miyuki Fukuda, Masayuki Yokode, Susumu Miyamoto
BACKGROUND: Chronic inflammation plays a key role in the pathogenesis of intracranial aneurysms (IAs). DPP-4 (dipeptidyl peptidase-4) inhibitors have anti-inflammatory effects, including suppressing macrophage infiltration, in various inflammatory models. We examined whether a DPP-4 inhibitor, anagliptin, could suppress the growth of IAs in a rodent aneurysm model. METHODS AND RESULTS: IAs were surgically induced in 7-week-old male Sprague Dawley rats, followed by oral administration of 300 mg/kg anagliptin...
June 19, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28628334/chiral-indolylarylsulfone-non-nucleoside-reverse-transcriptase-inhibitors-as-new-potent-and-broad-spectrum-anti-hiv-1-agents
#4
Valeria Famiglini, Giuseppe La Regina, Antonio Coluccia, Domiziana Masci, Andrea Brancale, Roger Badia, Eva Riveira Muñoz, Jose A Este, Emmanuele Crespan, Alessandro Brambilla, Giovanni Maga, Myriam Catalano, Cristina Limatola, Francesca Romana Romana Formica, Roberto Cirilli, Ettore Novellino, Romano Silvestri
We designed and synthesized a series of chiral indolyarylsulfones (IASs) as new HIV-1 NNRTIs. The new IASs 8-37 showed potent inhibition of the HIV-1 WT NL4-3 strain and of the mutant K103N, Y181C, Y188L and K103N-Y181C HIV-1 strains. Six racemic mixtures, 8, 23-25, 31 and 33, were separated at semipreparative level into their pure enantiomers. The (R)-8 enantiomer bearing the chiral (α-methylbenzyl) was superior to the (S)-counterpart. IAS derivatives bearing the (S) alanine unit, (S)-23, (S,R)-25, (S)-31 and (S)-33, were remarkably more potent than the corresponding (R)-enantiomers...
June 19, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28625818/quantitative-assessment-of-lung-and-bladder-cancer-risk-and-oral-exposure-to-inorganic-arsenic-meta-regression-analyses-of-epidemiological-data
#5
Heather N Lynch, Ke Zu, Erin M Kennedy, Thuy Lam, Xiaobin Liu, Daniella M Pizzurro, Christine T Loftus, Lorenz R Rhomberg
Inorganic arsenic (iAs) in drinking water varies geographically and is prevalent worldwide. While exposures in the US are generally low, there are some areas with higher levels of naturally occurring iAs (potentially >100μg/L) where residents rely on unregulated drinking water wells. Much of the evidence on the association between iAs and cancer comes from epidemiological studies conducted in South American and Asian populations. These populations have generally been exposed to much higher levels of iAs and have differing underlying characteristics, both of which make comparing them to Western populations difficult...
June 16, 2017: Environment International
https://www.readbyqxmd.com/read/28625634/imaging-features-of-tsct-predict-the-classification-of-pulmonary-preinvasive-lesion-minimally-and-invasive-adenocarcinoma-presented-as-ground-glass-nodules
#6
Yinan Liu, Hui Sun, Fei Zhou, Chunxia Su, Guanghui Gao, Shengxiang Ren, Caicun Zhou, Zhemin Zhang, Jingyun Shi
OBJECTIVES: To comprehensively investigate the role of thin section computed tomography(TSCT) features to distinguish invasive adenocarcinoma(IA) from preinvasive or minimally invasive adenocarcinoma(MIA) appearing as pure or mixed ground glass nodules (pGGNs, mGGNs), and to distinguish adenocarcinoma in situ (AIS) from atypical adenomatous hyperplasia (AAH) in pGGNs. MATERIALS AND METHODS: Three hundred thirteen patients with 334 pathologically diagnosed GGNs according to the 2011 IASLC/ATS/ERS classification were included into this study...
June 2017: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/28619494/role-of-hemodynamics-forces-in-unruptured-intracranial-aneurysms-an-overview-of-a-complex-scenario
#7
REVIEW
Marcello Longo, Francesca Granata, Sergio Racchiusa, Enricomaria Mormina, Grasso Giovanni, Giuseppe Maria Longo, Giada Garufi, Francesco M Salpietro, Concetta Alafaci
BACKGROUND: The understanding of unruptured intracranial aneurysms (IAs) natural history has always played a critical role in pre-surgical or endovascular planning, in order to avoid possible fatal events. Size, shape, morphology and location are known risk factors for aneurysm's rupture, but morphologic parameters alone, may not be sufficient in order to perform a proper rupture risk stratification. METHODS: We performed a systematic PUBMED search and focused on hemodynamics forces which may influence aneurysmal initiation, growth and rupture...
June 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28599841/changing-paradigm-in-the-management-of-elderly-patients-with-intracranial-aneurysms-an-institutional-review
#8
Oleg Y Chernyshev, Shyamal C Bir, Tanmoy K Maiti, Devi Prasad Patra, Cesar Liendo, Hugo Cuellar, Alireza Minagar, Anil Nanda
Optimal treatment of intracranial aneurysms (IAs) in elderly patients has not yet been well established. We have investigated the clinical and radiological outcomes and predictors of unfavorable outcome of IAs in elderly patients. Radiological and clinical data of 85 elderly patients from 2010 through 2015 were retrospectively reviewed. Significant differences between the groups were determined by a chi-square test. Regression analysis was performed to identify the predictors of unfavorable outcome. Among the 85 patients with IAs, the number of patients with >7mm size aneurysm (p=0...
June 6, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28596303/prevalence-and-predictors-of-intracranial-aneurysms-in-patients-with-bicuspid-aortic-valve
#9
Alexander C Egbe, Ratnasari Padang, Robert D Brown, Arooj R Khan, Sushil A Luis, John Huston, Emmanuel Akintoye, Heidi M Connolly
OBJECTIVE: To determine the prevalence and outcomes of intracranial aneurysm (IA) in patients with bicuspid aortic valve (BAV) METHODS: Retrospective review of patients with BAV who underwent brain MR angiography at the Mayo Clinic from 1994 to 2013. RESULTS: There were 678 patients included in this study-mean age 57±13 years, men 480 (71%), mean follow-up 10±3 years (5913 patient-years). Coarctation of aorta (COA) was present in 154 (23%) patients.There were 59 IAs identified in 52 of 678 patients (7...
June 8, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28595795/relationship-between-arsenic-and-selenium-in-workers-occupationally-exposed-to-inorganic-arsenic
#10
Beata Janasik, Anna Zawisza, Beata Malachowska, Wojciech Fendler, Magdalena Stanislawska, Renata Kuras, Wojciech Wasowicz
The interaction between arsenic (As) and selenium (Se) has been one of the most extensively studied. The antagonism between As and Se suggests that low Se status plays an important role in aggravating arsenic toxicity in diseases development. The objective of this study was to assess the Se contents in biological samples of inorganic As exposed workers (n=61) and in non-exposed subjects (n=52). Median (Me) total arsenic concentration in urine of exposed workers was 21.83μg/g creat. (interquartile range (IQR) 15...
July 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28593546/differential-toxicity-of-arsenic-on-renal-oxidative-damage-and-urinary-metabolic-profiles-in-normal-and-diabetic-mice
#11
Jinbao Yin, Su Liu, Jing Yu, Bing Wu
Diabetes is a common metabolic disease, which might influence susceptibility of the kidney to arsenic toxicity. However, relative report is limited. In this study, we compared the influence of inorganic arsenic (iAs) on renal oxidative damage and urinary metabolic profiles of normal and diabetic mice. Results showed that iAs exposure increased renal lipid peroxidation in diabetic mice and oxidative DNA damage in normal mice, meaning different effects of iAs exposure on normal and diabetic individuals. Nuclear magnetic resonance (NMR)-based metabolome analyses found that diabetes significantly changed urinary metabolic profiles of mice...
June 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28588949/systematic-review-and-meta-analysis-of-the-adolescent-hiv-continuum-of-care-in-south-africa-the-cresting-wave
#12
Brian C Zanoni, Moherndran Archary, Sarah Buchan, Ingrid T Katz, Jessica E Haberer
CONTEXT: South Africa has the most HIV infections of any country in the world, yet little is known about the adolescent continuum of care from HIV diagnosis through viral suppression. OBJECTIVE: To determine the adolescent HIV continuum of care in South Africa. DATA SOURCES: We searched PubMed, Google Scholar and online conference proceedings from International AIDS Society (IAS), International AIDS Conference (AIDS) and Conference on Retrovirology and Opportunistic Infections (CROI) from 1 January 2005 to 31 July 2015...
November 2016: BMJ Global Health
https://www.readbyqxmd.com/read/28587396/identification-of-the-mirna-target-gene-regulatory-network-in-intracranial-aneurysm-based-on-microarray-expression-data
#13
Kezhen Wang, Xinmin Wang, Hongzhu Lv, Chengzhi Cui, Jiyong Leng, Kai Xu, Guosong Yu, Jianwei Chen, Peiyu Cong
Intracranial aneurysm (IA) remains one of the most devastating neurological conditions. However, the pathophysiology of IA formation and rupture still remains unclear. The purpose of the present study was to identify the crucial microRNA (miRNA/miR) and genes involved in IAs and elucidate the mechanisms underlying the development of IAs. In the present study, novel miRNA regulation activities in IAs were investigated through the integration of public gene expression data of miRNA and mRNA using the Gene Expression Omnibus database, combined with bioinformatics prediction...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28579250/dna-methylation-of-extracellular-matrix-remodeling-genes-in-children-exposed-to-arsenic
#14
Tania Gonzalez-Cortes, Rogelio Recio-Vega, Robert Clark Lantz, Binh T Chau
Several novel mechanistic findings regarding to arsenic's pathogenesis has been reported and some of them suggest that the etiology of some arsenic induced diseases are due in part to heritable changes to the genome via epigenetic processes such as DNA methylation, histone maintenance, and mRNA expression. Recently, we reported that arsenic exposure during in utero and early life was associated with impairment in the lung function and abnormal receptor for advanced glycation endproducts (RAGE), matrix metalloproteinase-9 (MMP-9) and tissue inhibitor of matrix metalloproteinase-1 (TIMP-1) sputum levels...
June 1, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28575128/neurofibromatosis-type-1-is-not-associated-with-subarachnoid-haemorrhage
#15
Arttu Kurtelius, Roope A Kallionpää, Jukka Huttunen, Terhi J Huttunen, Katariina Helin, Timo Koivisto, Juhana Frösen, Mikael von Und Zu Fraunberg, Sirkku Peltonen, Juha Peltonen, Juha E Jääskeläinen, Antti E Lindgren
BACKGROUND: The prevalence of intracranial aneurysms (IAs) has been proposed to be elevated in the patients with neurofibromatosis type 1 (NF1). Our aims were to determine the prevalence of NF1 in a large Finnish population based cohort of IA patients and, on the other hand, the occurrences of subarachnoid haemorrhage and unruptured intracranial aneurysms in a nationwide population-based cohort of NF1 patients and its matched ten-fold control cohort. METHODS: The Kuopio IA Database (www...
2017: PloS One
https://www.readbyqxmd.com/read/28573970/uncertainty-quantification-of-wall-shear-stress-in-intracranial-aneurysms-using-a-data-driven-statistical-model-of-systemic-blood-flow-variability
#16
Ali Sarrami-Foroushani, Toni Lassila, Ali Gooya, Arjan J Geers, Alejandro F Frangi
Adverse wall shear stress (WSS) patterns are known to play a key role in the localisation, formation, and progression of intracranial aneurysms (IAs). Complex region-specific and time-varying aneurysmal WSS patterns depend both on vascular morphology as well as on variable systemic flow conditions. Computational fluid dynamics (CFD) has been proposed for characterising WSS patterns in IAs; however, CFD simulations often rely on deterministic boundary conditions that are not representative of the actual variations in blood flow...
December 8, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28572689/a-field-deployable-method-for-a-rapid-screening-analysis-of-inorganic-arsenic-in-seaweed
#17
Edi Bralatei, Karolina Nekrosiute, Jenny Ronan, Andrea Raab, Evin McGovern, Dagmar B Stengel, Eva M Krupp, Joerg Feldmann
Inorganic arsenic (iAs) in 13 store-bought edible seaweed samples and 34 dried kelp (Laminaria digitata) samples was determined by a newly developed, field-deployable method (FDM) with the aid of a field test kit for arsenic in water. Results from the FDM were compared to results from speciation analysis achieved by using high performance liquid chromatography coupled to inductively coupled plasma mass spectrometry (HPLC-ICP-MS). The FDM consisted of a simple extraction method using diluted HNO3 to quantitatively extract iAs without decomposing the organoarsenicals to iAs followed by the selective volatilisation of iAs as arsine (AsH3) and subsequent chemo-trapping on a filter paper soaked in mercury bromide (HgBr2) solution...
2017: Mikrochimica Acta
https://www.readbyqxmd.com/read/28572075/estimating-inorganic-arsenic-exposure-from-u-s-rice-and-total-water-intakes
#18
Madhavi Mantha, Edward Yeary, John Trent, Patricia A Creed, Kevin Kubachka, Traci Hanley, Nohora Shockey, Douglas Heitkemper, Joseph Caruso, Jianping Xue, Glenn Rice, Larry Wymer, John T Creed
BACKGROUND: Among nonoccupationally exposed U.S. residents, drinking water and diet are considered primary exposure pathways for inorganic arsenic (iAs). In drinking water, iAs is the primary form of arsenic (As), while dietary As speciation techniques are used to differentiate iAs from less toxic arsenicals in food matrices. OBJECTIVES: Our goal was to estimate the distribution of iAs exposure rates from drinking water intakes and rice consumption in the U.S. population and ethnic- and age-based subpopulations...
May 30, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28565981/complications-associated-with-the-use-of-flow-diverting-devices-for-cerebral-aneurysms-a-systematic-review-and-meta-analysis
#19
Geng Zhou, Ming Su, Yan-Ling Yin, Ming-Hua Li
OBJECTIVE The objective of this study was to review the literature on the use of flow-diverting devices (FDDs) to treat intracranial aneurysms (IAs) and to investigate the safety and complications related to FDD treatment for IAs by performing a meta-analysis of published studies. METHODS A systematic electronic database search was conducted using the Springer, EBSCO, PubMed, Medline, and Cochrane databases on all accessible articles published up to January 2016, with no restriction on the publication year...
June 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28560556/shear-stress-induces-phenotypic-modulation-of-vascular-smooth-muscle-cells-via-ampk-mtor-ulk1-mediated-autophagy
#20
Liqian Sun, Manman Zhao, Aihua Liu, Ming Lv, Jingbo Zhang, Youxiang Li, Xinjian Yang, Zhongxue Wu
Phenotypic modulation of vascular smooth muscle cells (VSMCs) is involved in the pathophysiological processes of the intracranial aneurysms (IAs). Although shear stress has been implicated in the proliferation, migration, and phenotypic conversion of VSMCs, the molecular mechanisms underlying these events are currently unknown. In this study, we investigated whether shear stress(SS)-induced VSMC phenotypic modulation was mediated by autophagy involved in adenosine monophosphate-activated protein kinase (AMPK)/mammalian target of rapamycin (mTOR)/Unc-51-like kinase 1 (ULK1) pathway...
May 30, 2017: Cellular and Molecular Neurobiology
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