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https://www.readbyqxmd.com/read/29223814/a-metabolomics-strategy-to-assess-the-combined-toxicity-of-polycyclic-aromatic-hydrocarbons-pahs-and-short-chain-chlorinated-paraffins-sccps
#1
Feidi Wang, Haijun Zhang, Ningbo Geng, Xiaoqian Ren, Baoqin Zhang, Yufeng Gong, Jiping Chen
The combined toxicity of mixed chemicals is usually evaluated according to several specific endpoints, and other potentially toxic effects are disregarded. In this study, we provided a metabolomics strategy to achieve a comprehensive understanding of toxicological interactions between mixed chemicals on metabolism. The metabolic changes were quantified by a pseudotargeted analysis, and the types of combined effects were quantitatively discriminated according to the calculation of metabolic effect level index (MELI)...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223812/could-saponins-be-used-to-enhance-bioremediation-of-polycyclic-aromatic-hydrocarbons-in-aged-contaminated-soils
#2
Marie Davin, Amandine Starren, Magali Deleu, Georges Lognay, Gilles Colinet, Marie-Laure Fauconnier
Polycyclic aromatic hydrocarbons (PAH) are persistent organic compounds of major concern that tend to accumulate in the environment, threatening ecosystems and health. Brownfields represent an important tank for PAHs and require remediation. Researches to develop bioremediation and phytoremediation techniques are being conducted as alternatives to environmentally aggressive, expensive and often disruptive soil remediation strategies. The objectives of the present study were to investigate the potential of saponins (natural surfactants) as extracting agents and as bioremediation enhancers on an aged-contaminated soil...
December 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/29223736/transepithelial-transfer-of-phenanthrene-but-not-of-benzo-a-pyrene-is-inhibited-by-fatty-acids-in-the-proximal-intestine-of-rainbow-trout-oncorhynchus-mykiss
#3
Stefan de Gelder, Henrik Sundh, Thamar N M Pelgrim, Josef D Rasinger, Lotte van Daal, Gert Flik, Marc H G Berntssen, Peter H M Klaren
The inclusion of vegetable oils in aquafeeds introduces contaminating polycyclic aromatic hydrocarbons (PAHs) in salmonids. Since lipophilic PAHs solubilize in micelles composed of lipids, bile salts and fatty acids, dietary lipid composition can alter intestinal transepithelial PAH transfer. We studied the uptake of two PAHs, viz. benzo[a]pyrene (BaP) and phenanthrene (PHE), in rainbow trout (Oncorhynchus mykiss) intestine. We also investigated the effects of two fatty acids, viz. fish oil-derived eicosapentaenoic acid (EPA, 20:5n-3) and vegetable oil-derived oleic acid (18:1n-9) on intestinal uptake...
December 6, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29223470/reveal-risk-scores-applied-to-riociguat-treated-patients-in-patent-2-impact-of-changes-in-risk-score-on-survival
#4
Raymond L Benza, Harrison W Farber, Adaani Frost, Hossein-Ardeschir Ghofrani, Miguel A Gómez-Sánchez, David Langleben, Stephan Rosenkranz, Dennis Busse, Christian Meier, Sylvia Nikkho, Marius M Hoeper
BACKGROUND: The Registry to Evaluate Early and Long-term PAH Disease Management (REVEAL) risk score (RRS) calculator was developed using data derived from the REVEAL registry, and predicts survival in patients with pulmonary arterial hypertension (PAH) based on multiple patient characteristics. Herein we applied the RRS to a pivotal PAH trial database, the 12-week PATENT-1 and open-label PATENT-2 extension studies of riociguat. We examined the effect of riociguat vs placebo on RRS in PATENT-1, and investigated the prognostic implications of change in RRS during PATENT-1 on long-term outcomes in PATENT-2...
November 11, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/29221954/total-particulate-matter-from-cigarette-smoke-disrupts-vascular-development-in-zebrafish-brain-danio-rerio
#5
Andrey Massarsky, G L Prasad, Richard T Di Giulio
Several studies have demonstrated zebrafish as a useful high-throughput in-vivo model to study the effects of cigarette smoke on early development. It has been shown previously that exposure of zebrafish to cigarette smoke total particulate matter (TPM) leads to several adverse physiological aberrations, including heart deformities and improper angiogenesis. Consequently, this study investigated the effects of TPM on cardiovascular development in zebrafish that were exposed to increasing concentrations of TPM based upon nicotine content from 6h post fertilization (hpf) up to 72hpf...
December 5, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29220691/bioaccumulation-of-oil-compounds-in-the-high-arctic-copepod-calanus-hyperboreus
#6
Mette Dalgaard Agersted, Eva Friis Møller, Kim Gustavson
Oil and gas exploration in the Arctic will increase the risk for accidental oil spills and thereby have a potential impact on the ecosystem and the organisms inhabiting these areas. Lipid rich copepods are an important food source for higher trophic levels in Arctic marine ecosystems. However, high lipid content and a slower metabolism increase the risk for bioaccumulation in Arctic species. Here we exposed three late development stages of the lipid rich high-Arctic copepod species Calanus hyperboreus to two different 14C-marked crude oil model compounds, the alkane dodecane (log Kow 6...
December 5, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29218577/street-foods-exacerbate-effects-of-the-environmental-burden-of-polycyclic-aromatic-hydrocarbons-pahs-in-nigeria
#7
Osazuwa Clinton Ekhator, Nnaemeka Arinze Udowelle, Sorbari Igbiri, Rose Ngozi Asomugha, Chiara Frazzoli, Orish Ebere Orisakwe
Polycyclic aromatic hydrocarbons (PAHs) are a large group of well-known toxicants with carcinogenic potential and other health effects including on the immune system. The high health risks of non-communicable diseases and relevant comorbidities in Africa, particularly in contaminated areas like e-waste and crude oil and gas exploration areas and for high consumers of food commodity groupings which are most critical for PAH exposure, are exacerbated by dietary exposure due to unsafe practices in commonly consumed foods, like those street vended...
December 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29218508/use-of-huh6-and-other-human-derived-hepatoma-lines-for-the-detection-of-genotoxins-a-new-hope-for-laboratory-animals
#8
Monika Waldherr, Miroslav Mišík, Franziska Ferk, Jana Tomc, Bojana Žegura, Metka Filipič, Wolfgang Mikulits, Sören Mai, Oskar Haas, Wolfgang W Huber, Elisabeth Haslinger, Siegfried Knasmüller
Cell lines which are currently used in genotoxicity tests lack enzymes which activate/detoxify mutagens. Therefore, rodent-derived liver preparations are used which reflect their metabolism in humans only partly; as a consequence misleading results are often obtained. Previous findings suggest that certain liver cell lines express phase I/II enzymes and detect promutagens without activation; however, their use is hampered by different shortcomings. The aim of this study was the identification of a suitable cell line...
December 7, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/29217392/influence-of-traffic-on-build-up-of-polycyclic-aromatic-hydrocarbons-on-urban-road-surfaces-a-bayesian-network-modelling-approach
#9
Yingxia Li, Ziliang Jia, Buddhi Wijesiri, Ningning Song, Ashantha Goonetilleke
Due to their carcinogenic effects, Polycyclic Aromatic Hydrocarbons (PAHs) deposited on urban surfaces are a major concern in the context of stormwater pollution. However, the design of effective pollution mitigation strategies is challenging due to the lack of reliability in stormwater quality modelling outcomes. Current modelling approaches do not adequately replicate the interdependencies between pollutant processes and their influential factors. Using Bayesian Network modelling, this research study characterised the influence of vehicular traffic on the build-up of the sixteen US EPA classified priority PAHs...
December 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29216488/microbial-community-composition-and-pahs-removal-potential-of-indigenous-bacteria-in-oil-contaminated-sediment-of-taean-coast-korea
#10
Dong Wan Lee, Hanbyul Lee, Aslan Hwanhwi Lee, Bong-Oh Kwon, Jong Seong Khim, Un Hyuk Yim, Beom Seok Kim, Jae-Jin Kim
The tidal flats near Sinduri beach in Taean, Korea, have been severely contaminated by heavy crude oils due to the Korea's worst oil spill accident, say the Hebei Spirit Oil Spill, in 2007. Crude oil compounds, including polycyclic aromatic hydrocarbons (PAHs), pose significant environmental damages due to their wide distribution, persistence, high toxicity, mutagenicity, and carcinogenicity. Microbial community of Sinduri beach sediments samples was analyzed by metagenomic data with 16S rRNA gene amplicons...
December 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29215546/initial-tadalafil-and-ambrisentan-combination-therapy-in-pulmonary-arterial-hypertension-clinical-and-haemodynamic-long-term-efficacy-italy-study
#11
Michele D'Alto, Emanuele Romeo, Paola Argiento, Giuseppe Paciocco, Renato Prediletto, Stefano Ghio, Michele Correale, Francesco Lo Giudice, Roberto Badagliacca, Alessandra Greco, Carmine Dario Vizza
AIMS: Initial combination therapy with ambrisentan and tadalafil (upfront therapy) offers clinical benefits in pulmonary arterial hypertension (PAH) and reduces the risk of clinical failure compared with monotherapy in naïve patients. The aim of study is to assess the efficacy of a 12-month upfront therapy with ambrisentan and tadalafil in improving haemodynamics in incident PAH patients. METHODS: This is a multicentre retrospective analysis of real-world Italian clinical data in 56 patients with newly diagnosed PAH...
January 2018: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29214548/first-clinical-symptom-as-a-prognostic-factor-in-systemic-sclerosis-results-of-a-retrospective-nationwide-cohort-study
#12
Manuel Rubio-Rivas, Xavier Corbella, Melany Pestaña-Fernández, Carles Tolosa-Vilella, Alfredo Guillen-Del Castillo, Dolores Colunga-Argüelles, Luis Trapiella-Martínez, Nerea Iniesta-Arandia, María Jesús Castillo-Palma, Luis Sáez-Comet, María Victoria Egurbide-Arberas, Norberto Ortego-Centeno, Mayka Freire, Jose Antonio Vargas-Hitos, Juan José Ríos-Blanco, Jose Antonio Todolí-Parra, Mónica Rodríguez-Carballeira, Adela Marín-Ballvé, Pablo Segovia-Alonso, Xavier Pla-Salas, Ana Belén Madroñero-Vuelta, Manuel Ruiz-Muñoz, Vicent Fonollosa-Pla, Carmen Pilar Simeón-Aznar, E Callejas Moraga, E Calvo, C Carbonell, M J Castillo, A J Chamorro, D Colunga, X Corbella, M V Egurbide, G Espinosa, V Fonollosa, M Freire, F J García Hernández, R González León, A Guillén Del Castillo, N Iniesta, R Lorenzo, A B Madroñero, B Marí, A Marín, N Ortego-Centeno, M Pérez Conesa, M Pestaña, X Pla, J J Ríos Blanco, M Rodríguez Carballeira, M Rubio Rivas, M Ruiz Muñoz, L Sáez Comet, P Segovia, C P Simeón, A Soto, E Tarí, J A Todolí, C Tolosa, L Trapiella, J A Vargas Hitos, G Verdejo
The objective of the study is to determine the importance of the mode of onset as prognostic factor in systemic sclerosis (SSc). Data were collected from the Spanish Scleroderma Registry (RESCLE), a nationwide retrospective multicenter database created in 2006. As first symptom, we included Raynaud's phenomenon (RP), cutaneous sclerosis, arthralgia/arthritis, puffy hands, interstitial lung disease (ILD), pulmonary arterial hypertension (PAH), and digestive hypomotility. A total of 1625 patients were recruited...
December 7, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/29214360/insights-into-the-genome-and-proteome-of-sphingomonas-paucimobilis-strain-20006fa-involved-in-the-regulation-of-polycyclic-aromatic-hydrocarbon-degradation
#13
M Macchi, M Martinez, R M Neme Tauil, M P Valacco, I S Morelli, B M Coppotelli
In order to study the mechanisms regulating the phenanthrene degradation pathway and the intermediate-metabolite accumulation in strain S. paucimobilis 20006FA, we sequenced the genome and compared the genome-based predictions to experimental proteomic analyses. Physiological studies indicated that the degradation involved the salicylate and protocatechuate pathways, reaching 56.3% after 15 days. Furthermore, the strain degraded other polycyclic aromatic hydrocarbons (PAH) such as anthracene (13.1%), dibenzothiophene (76...
December 6, 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29212971/-chronic-myeloid-leukemia-complicated-by-pulmonary-hypertension-during-dasatinib-therapy-a-single-center-retrospective-study
#14
Yoko Edahiro, Tomoiku Takaku, Hakuoh Konishi, Yutaka Tsukune, Isao Fujioka, Kiyoshi Takasu, Akihiko Gotoh, Hiroyuki Daida, Norio Komatsu
Pulmonary artery hypertension (PAH) has been reported to be a severe adverse event associated with dasatinib therapy. Among the 76 chronic myeloid patients who were treated with dasatinib at our hospital, six patients showed high estimated pulmonary arterial systolic pressure, as observed by echocardiography. PAH was confirmed using right heart catheterization in three (3.9%) patients with increased mean pulmonary artery pressure (mPAP). In one patient, although mPAP was higher than the normal range, it did not fulfill the criteria of pulmonary hypertension...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/29211447/efficient-removal-of-pahs-dyes-and-heavy-metal-ions-by-a-homopolymer-vesicle
#15
Hui Sun, Jinhui Jiang, Yufen Xiao, Jianzhong Du
It is an important challenge to effectively remove environmental pollutants such as polycyclic aromatic hydrocarbons (PAHs), dyes and heavy metal ions at a low cost. Herein, we present a multifunctional homopolymer vesicle self-assembled from a scalable homopolymer, poly(amic acid) (PAA) at room temperature. The vesicle can efficiently eliminate PAHs, cationic dyes and heavy metal ions from water based on π-π stacking, hydrophobic effect and electrostatic interactions with the pollutants. The residual concentrations of PAHs, cationic dyes and heavy metal ions (such as Ni2+) in water are lower than 0...
December 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29208962/exploration-of-pyrazine-embedded-antiaromatic-polycyclic-hydrocarbons-generated-by-solution-and-on-surface-azomethine-ylide-homocoupling
#16
Xiao-Ye Wang, Marcus Richter, Yuanqin He, Jonas Björk, Alexander Riss, Raju Rajesh, Manuela Garnica, Felix Hennersdorf, Jan J Weigand, Akimitsu Narita, Reinhard Berger, Xinliang Feng, Willi Auwärter, Johannes V Barth, Carlos-Andres Palma, Klaus Müllen
Nanographenes, namely polycyclic aromatic hydrocarbons (PAHs) with nanoscale dimensions (>1 nm), are atomically precise cutouts from graphene. They represent prime models to enhance the scope of chemical and physical properties of graphene through structural modulation and functionalization. Defined nitrogen doping in nanographenes is particularly attractive due to its potential for increasing the number of π-electrons, with the possibility of introducing localized antiaromatic ring elements. Herein we present azomethine ylide homocoupling as a strategy to afford internally nitrogen-doped, non-planar PAH in solution and planar nanographene on surfaces, with central pyrazine rings...
December 5, 2017: Nature Communications
https://www.readbyqxmd.com/read/29208691/inhibition-of-nitric-oxide-synthase-unmasks-vigorous-vasoconstriction-in-established-pulmonary-arterial-hypertension
#17
Mariko Tanaka, Kohtaro Abe, Masahiko Oka, Keita Saku, Keimei Yoshida, Tomohito Ishikawa, Ivan F McMurtry, Kenji Sunagawa, Sumio Hoka, Hiroyuki Tsutsui
It is widely accepted that impaired bioavailability of endothelial nitric oxide (NO) plays a critical role in the pathophysiology of pulmonary arterial hypertension (PAH). However, there are published data that show that relatively many PAH patients respond favorably to acetylcholine-induced pulmonary vasodilation during their follow-up period, when diverse stages of the disorder are included. We hypothesized that NO bioavailability varies depending on the progression of PAH Adult rats were exposed to the VEGF receptor blocker Sugen5416 and 3 weeks of hypoxia followed by return to normoxia for various additional weeks...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29208555/hollow-mesoporous-zirconia-delivery-system-for-biomineralization-precursors
#18
Xue-Qing Huang, Hong-Ye Yang, Tao Luo, Cui Huang, Franklin R Tay, Li-Na Niu
Strategies based on the combination of nanocarrier delivery systems and scaffolds provide bone tissue engineering scaffolds with multifunctional capability. Zirconia, a biocompatible ceramic commonly used in orthopedic and dental implants, was used to synthesize hollow mesoporous nanocapsules for loading, storage and sustained release of a novel polyamine-stabilized liquid precursor phase of amorphous calcium phosphate (PAH-ACP) for collagen biomineralization and bone marrow stromal cells osteoinduction. Hollow mesoporous zirconia (hmZrO2) nanocapsules loaded with biomimetic precursors exhibited pH-sensitive release capability and good biocompatibility...
December 2, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29206084/identity-crisis-in-pulmonary-arterial-hypertension
#19
G Ruffenach, S Bonnet, S Rousseaux, S Khochbin, S Provencher, F Perros
Pulmonary arterial hypertension (PAH) shares many hallmarks with cancer. Cancer cells acquire their hallmarks by a pathological Darwinian evolution process built on the so-called cancer cell "identity crisis." Here we demonstrate that PAH shares the most striking features of the cancer identity crisis: the ectopic expression of normally silent tissue-specific genes.
January 2018: Pulmonary Circulation
https://www.readbyqxmd.com/read/29204943/occurrence-distribution-and-composition-of-aliphatic-and-polycyclic-aromatic-hydrocarbons-in-sediment-cores-from-the-lower-fox-river-wisconsin-us
#20
Chase S Brewster, Virender K Sharma, Leslie Cizmas, Thomas J McDonald
The Lower Fox River is a 39 mile section which supports approximately 270,000 rural inhabitants across 18 counties, 303,000 metropolitan residents in Green Bay and Appleton, Wisconsin, and several large industrial complexes such as paper mills and power plants. This paper presents the distribution and concentrations of aliphatic (n-alkanes) and aromatic hydrocarbons (polycyclic aromatic hydrocarbons [PAHs]) as well as total organic carbon (TOC) in the Lower Fox River to identify the sources of hydrocarbon contamination...
December 5, 2017: Environmental Science and Pollution Research International
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