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https://www.readbyqxmd.com/read/28646766/gaps-in-aquatic-toxicological-studies-of-microplastics
#1
REVIEW
Ali Karami
The contamination of aquatic environments with microplastics (MPs) has spurred an unprecedented interest among scientific communities to investigate their impacts on biota. Despite the rapid growth in the number of studies on the aquatic toxicology of MPs, controversy over the fate and biological impacts of MPs is increasingly growing mainly due to the absence of standardized laboratory bioassays. Given the complex features of MPs, such as the diversity of constituent polymers, additives, shapes and sizes, as well as continuous changes in the particle buoyancy as a result of fouling and defouling processes, it is necessary to modify conventional bioassay protocols before employing them for MP toxicity testings...
June 14, 2017: Chemosphere
https://www.readbyqxmd.com/read/28646650/requirement-for-eukaryotic-translation-initiation-factors-in-cap-independent-translation-differs-between-bipartite-genomic-rnas-of-red-clover-necrotic-mosaic-virus
#2
Yuri Tajima, Hiro-Oki Iwakawa, Kiwamu Hyodo, Masanori Kaido, Kazuyuki Mise, Tetsuro Okuno
The bipartite genomic RNAs of red clover necrotic mosaic virus (RCNMV) lack a 5' cap and a 3' poly(A) tail. RNA1 encodes viral replication proteins, and RNA2 encodes a movement protein (MP). These proteins are translated in a cap-independent manner. We previously identified two cis-acting RNA elements that cooperatively recruit eukaryotic translation initiation factor (eIF) complex eIF4F or eIFiso4F to RNA1. Such cis-acting RNA elements and host factors have not been identified in RNA2. Here we found that translation of RNA1 was significantly compromised in Arabidopsis thaliana carrying eif4f mutation...
June 21, 2017: Virology
https://www.readbyqxmd.com/read/28646593/mri-assisted-dual-motion-correction-for-myocardial-perfusion-defect-detection-in-pet-imaging
#3
Xinhui Wang, Arman Rahmim, Jing Tang
PURPOSE: Myocardial perfusion (MP) PET imaging is a powerful tool in risk assess-assessment and stratification of patients with coronary artery disease. Involuntary organmotion degrades cardiac PET image resolution while respiratory and/or cardiac gating to freeze the motion leads to noisier reconstructed images due to reduced counts in the gated frames. In this work, we propose an MRI assisted dual motion correction method to compensate for respiratory and cardiac motion in MP PET data and study the impact of dual motion correction on MP defect detection using systematically designed experiments...
June 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28646182/high-intensity-interval-training-improves-mitochondrial-function-and-suppresses-thrombin-generation-in-platelets-undergoing-hypoxic-stress
#4
Li-Hua Wu, Shao-Chiang Chang, Tieh-Cheng Fu, Ching-Hui Huang, Jong-Shyan Wang
This study elucidates how high-intensity interval training (HIT) and moderate-intensity continuous training (MCT) affect mitochondrial functionality and thrombin generation (TG) in platelets following hypoxic exercise (HE, 100 W under 12% O2 for 30 min). Forty-five healthy sedentary males were randomized to engage either HIT (3-minute intervals at 40% and 80%VO2max, n = 15) or MCT (sustained 60%VO2max, n = 15) for 30 minutes/day, 5 days/week for 6 weeks, or to a control group (CTL, n = 15) that did not received exercise intervention...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28644183/more-dose-dependent-side-effects-with-mercaptopurine-over-azathioprine-in-ibd-treatment-due-to-relatively-higher-dosing
#5
Mark M T J Broekman, Marieke J H Coenen, Corine J van Marrewijk, Geert J A Wanten, Dennis R Wong, Andre L M Verbeek, Olaf H Klungel, Piet M Hooymans, Henk-Jan Guchelaar, Hans Scheffer, Luc J J Derijks, Dirk J de Jong
BACKGROUND: There are substantial global differences in the preference for mercaptopurine (MP) or its prodrug azathioprine (AZA) as first-choice thiopurine to treat inflammatory bowel diseases. Studies comparing both agents are scarce. Our aim was to compare AZA and MP in thiopurine-naive patients with inflammatory bowel disease for the frequency of side effects and efficacy. METHODS: Post hoc analysis of the "Thiopurine response Optimization by Pharmacogenetic testing in Inflammatory bowel disease Clinics" (TOPIC) trial, in which thiopurine-naive patients with inflammatory bowel disease with an indication for a thiopurine were randomized for a genotype-based dose versus standard of care...
June 20, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28644178/temporal-thinning-in-sickle-cell-retinopathy-is-associated-with-diminished-perfusion-on-octa-and-dense-scotoma-on-microperimetery
#6
Kumar Sambhav, Sandeep Grover, Kakarla V Chalam
PURPOSE: To establish correlation between the structural compromise (capillary loss and hypoperfusion on optical coherence tomography [optical coherence tomography angiography]) with perimacular functional impairment noted on microperimetry. METHODS: Retrospective case series. Clinical records and multimodal imaging findings of patients presenting with sickle cell disease were reviewed. RESULTS: Three eyes of three patients (two men) were included in the study with a visual acuity of 20/20 and no sickle cell retinopathy...
June 20, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28644032/receptor-and-microenvironment-dual-recognizable-nanogel-for-targeted-chemotherapy-of-highly-metastatic-malignancy
#7
Jinjin Chen, Jianxun Ding, Weiguo Xu, Tianmeng Sun, Haihua Xiao, Xiuli Zhuang, Xuesi Chen
Targeted delivery of chemotherapeutic drugs to the desired lesion sites is the main objective in malignancy treatment, especially in highly metastatic malignancies. However, extensive studies around the world on traditional targeting strategies of recognizing either over-expressed receptors or microenvironments in tumors show great limitations, owing to the off-target effect and tumor homogeneity. Integration of both receptor-mediated targeting (RMT) and environment-mediated targeting (EMT) enhances the tumor accumulation and subsequent cell uptake at the same time, which may avoid these limitations...
June 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28642128/immunomodulation-of-parkinson-s-disease-using-mucuna-pruriens-mp
#8
REVIEW
Sachchida Nand Rai, Hareram Birla, Walia Zahra, Saumitra Sen Singh, Surya Pratap Singh
Immune control is associated with nigrostriatal neuroprotection for Parkinson's disease (PD); though its direct cause and effect relationships have not yet been realized and modulating the immune system for therapeutic gain has been openly discussed. While the pathobiology of PD remains in study, neuroinflammation is thought to speed nigrostriatal degeneration. The neuroinflammatory cascade associated with PD begins with aggregation of misfolded or post-translationally modified α-synuclein (α-syn). Such aggregation results in neuronal cell death and the presence of chronically activated glia (microglia and astroglia), leading to the production of proinflammatory cytokines like tumor necrosis factor alpha (TNF-α), interleukin-1 beta (IL-1β), IL-6, and enzymes such as nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and cyclooxygenase-2 (COX-2)...
June 19, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/28641620/-role-of-microparticles-derived-from-acute-promyelocytic-leukemia-cells-in-coagulopathy
#9
Ying-Mei Zhang, Bo Chen, Long-Yue Wu, Jin-Xiao Hou, Jin-Yue Fu
OBJECTIVE: To evaluate the role of microparticle (MP) derived from acute promyelocytic leukemia (APL) cells and tissue factor (TF) carried by the MP in hypercoagulable state, and the effect of treatment with cytotoxic chemotherapy/differentiating agents on procoagulant activity (PCA) of these MP. METHODS: Bone marrow mononuclear cells (BMMNC) were extracted from 5 APL patients and 5 sex- and age- matched patients with iron deficiency anemia as controls. The cells were cultured in vitro for 48 h, then MP-rich culture medium and MP-free culture medium were harvested and MP was further obtained from certain volume of MP-rich culture medium...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28640879/dual-targeting-of-a-virus-movement-protein-to-er-and-plasma-membrane-subdomains-is-essential-for-plasmodesmata-localization
#10
Kazuya Ishikawa, Masayoshi Hashimoto, Akira Yusa, Hiroaki Koinuma, Yugo Kitazawa, Osamu Netsu, Yasuyuki Yamaji, Shigetou Namba
Plant virus movement proteins (MPs) localize to plasmodesmata (PD) to facilitate virus cell-to-cell movement. Numerous studies have suggested that MPs use a pathway either through the ER or through the plasma membrane (PM). Furthermore, recent studies reported that ER-PM contact sites and PM microdomains, which are subdomains found in the ER and PM, are involved in virus cell-to-cell movement. However, functional relationship of these subdomains in MP traffic to PD has not been described previously. We demonstrate here the intracellular trafficking of fig mosaic virus MP (MPFMV) using live cell imaging, focusing on its ER-directing signal peptide (SPFMV)...
June 22, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28640753/mechanism-of-antihypertensive-effect-of-mucuna-pruriens-l-seed-extract-and-its-isolated-compounds
#11
Mohammad Yaseen Khan, Vimal Kumar
Background In the search of safe and effective lead molecules from natural sources, Mucuna pruriens (MP) L. (Fabaceae) seeds were utilized for exploring the antihypertensive potential. Traditionally, it is used as diuretic and hypotensive. Methods Bioassay-guided fractions were utilized for the isolation of active compounds by column chromatography. IC50 value, enzyme kinetics and inhibition mechanism were determined. In vivo time and dose-dependent hypotensive study followed by changes in mean arterial pressure (MAP) induced by angiotensin I (3 nmol/kg), angiotensin II (3 nmol/kg), and bradykinin (10 nmol/kg) in anesthetized rats was done...
June 21, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28640126/prolonged-methylprednisolone-therapy-after-the-pulse-treatment-for-patients-with-moderate-to-severe-paraquat-poisoning-a-retrospective-analysis
#12
Jie Gao, ShunYi Feng, Jian Wang, SiYuan Yang, Yong Li
This retrospective study aims to evaluate the effect of prolonged methylprednisolone (MP) therapy on the mortality of patients with moderate-to-severe paraquat (PQ) poisoning after the pulse treatment.We performed a retrospective analysis of patients with acute moderate-to-severe PQ poisoning that were admitted to the emergency department from May 2012 to August 2016. Out of 138 patients, 60 were treated with pulse treatment (15 mg kg day MP for 3 days) and 78 were treated with prolonged MP therapy after pulse treatment (15 mg kg day MP for 3 days; afterward, the dosage was reduced in half every 2 days, and the MP therapy was terminated until 0...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28640125/targeted-sequencing-in-fgf-fgfr-genes-and-association-analysis-of-variants-for-mandibular-prognathism
#13
Xueyan Xiong, Shuyuan Li, Ying Cai, Fengshan Chen
To identify variants of the genes in fibroblast growth factors/fibroblast growth factor receptors (FGF/FGFR) signal pathway that predispose to mandibular prognathism (MP) in the general Chinese population systematically.Targeted sequencing of the FGF/FGFR genes was conducted in 176 MP individuals and 155 class I malocclusion controls. The associations of common and rare variants with MP as a categorical phenotype and also continuous malocclusion phenotypes generated by principal component (PC) analysis were analyzed...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28637537/occult-hiv-infection-in-a-large-sample-of-health-care-users-in-lombardy-italy-in-2014-2015-implications-for-control-strategies
#14
L Scudeller, F Genco, F Baldanti, G Comolli, G Albonico, M Prestia, V Meroni
We estimated the number of people unaware of their human immunodeficiency virus (HIV) infection in our province, Pavia (population 540 000) in Lombardy, Italy, by means of anonymous unlinked testing of 10 044 serum/plasma samples residual from clinical analyses at the outpatient clinic of Policlinico San Matteo in 2014 and 2015. Ethical and legal approval was obtained prior to study start. Samples were irreversibly anonymised, only retaining gender and 5-year age class. Five sample pools were tested for HIV using LIAISON® XL MUREX HIV Ab/Ag (DiaSorin, Saluggia, Italy)...
June 22, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28635460/changing-the-agenda
#15
Tom Bolger
Conservative MP Maria Caulfield raises concerns about nurses' pay but claims it's not about total money in the system but 'what's being done with it'.
June 21, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28635459/pay-must-be-overhauled-says-re-elected-nurse-mp
#16
Matthew Mckew
Nurses should be able to expect the same pay for doing the same job wherever they work, a re-elected nurse MP has said.
June 21, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28635177/engineering-human-bone-grafts-with-new-macroporous-calcium-phosphate-cement-scaffolds
#17
Martina Sladkova, Michael Palmer, Caroline Öhman, Jiayi Cheng, Shoug Al-Ansari, Munerah Saad, Håkan Engqvist, Giuseppe Maria de Peppo
Bone engineering opens the possibility to grow large amounts of tissue products by combining patient-specific cells with compliant biomaterials. Decellularized tissue matrices represent suitable biomaterials but availability, long processing time, excessive cost, and concerns on pathogen transmission have led to the development of biomimetic synthetic alternatives. We recently fabricated calcium phosphate cement (CPC) scaffolds with variable macroporosity using a facile synthesis method with minimal manufacturing steps, and demonstrated long-term biocompatibility in vitro...
June 21, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28634110/pharmacological-rescue-of-ductal-cftr-rescue-pancreatic-and-salivary-glands-acinar-cells-and-tissue-function-in-mouse-models-of-autoimmune-diseases
#18
Mei Zeng, Mitchell Szymczak, Malini Ahuja, Changyu Zheng, Hongen Yin, William Swaim, John A Chiorini, Robert J Bridges, Shmuel Muallem
BACKGROUND & AIMS: Sjögren's syndrome and autoimmune pancreatitis (AIP) are disorders with decreased function of salivary, lacrimal glands, and the exocrine pancreas. NOD/ShiLTJ mice and mice transduced with the cytokine BMP6 develop Sjögren's syndrome and chronic pancreatitis and MRL/Mp mice are models of AIP. CFTR is a ductal Cl(-) channel essential for ductal fluid and HCO3(-) secretion. We used these models to ask: is CFTR expression altered in these diseases, does correction of CFTR correct gland function, and most notably, does correcting ductal function correct acinar function...
June 17, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28634021/mycoplasma-pneumoniae-and-health-outcomes-in-children-with-asthma
#19
Pamela R Wood, Jordan C Kampschmidt, Peter H Dube, Marianna P Cagle, Paola Chaparro, Norma S Ketchum, Thirumalai R Kannan, Harjinder Singh, Jay I Peters, Joel B Baseman, Edward G Brooks
BACKGROUND: Acute infections with Mycoplasma pneumoniae (Mp) have been associated with worsening asthma in children. Mp can be present in the respiratory tract for extended periods; it is unknown whether the long-term persistence of Mp in the respiratory tract affects long-term asthma control. OBJECTIVE: To determine the effect of Mp on asthma control. METHODS: We enrolled 31 pediatric subjects 3 to 10 years of age with persistent asthma who completed up to 8 visits over a 24-month period...
June 17, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28632726/infradiaphragmatic-irradiation-and-high-procarbazine-doses-increase-colorectal-cancer-risk-in-hodgkin-lymphoma-survivors
#20
Anna M van Eggermond, Michael Schaapveld, Cécile Pm Janus, Jan Paul de Boer, Augustinus Dg Krol, Josée M Zijlstra, Richard Wm van der Maazen, Leontien C Kremer, Monique E van Leerdam, Marieke Wj Louwman, Otto Visser, Marie L De Bruin, Berthe Mp Aleman, Flora E van Leeuwen
BACKGROUND: Hodgkin lymphoma (HL) survivors are at increased risk of second malignancies, but few studies have assessed colorectal cancer (CRC) risk after HL treatment. We assessed long-term, subsite-specific CRC risk associated with specific radiation fields and chemotherapy regimens. METHODS: In a Dutch cohort of 3121 5-year HL survivors treated between 1965 and 1995, subsite-specific CRC incidence was compared with general population rates. Treatment effects were quantified by Cox regression analyses...
June 20, 2017: British Journal of Cancer
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