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https://www.readbyqxmd.com/read/29210278/decellularized-liver-matrix-modified-cryogel-scaffolds-as-potential-hepatocyte-carriers-in-bioartificial-liver-support-systems-and-implantable-liver-constructs
#1
Apeksha Damania, Anupam Kumar, Arun Kumar Teotia, Kimura Haruna, Masamichi Kamihira, Hiroyuki Ijima, Shiv Kumar Sarin, Ashok Kumar
Recent progress in the use of decellularized organ scaffolds as regenerative matrices for tissue engineering holds great promise in addressing the issue of donor organ shortage. Decellularization preserves the mechanical integrity, composition, and microvasculature critical for zonation of hepatocytes in the liver. Earlier studies have reported the possibility of repopulating decellularized matrices with hepatic cell lines or stem cells to improve liver regeneration. In this work, we study the versatility of decellularized liver matrix as a substrate coating of 3D cryogel scaffolds...
December 6, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29203523/trajectories-of-e-cigarette-and-conventional-cigarette-use-among-youth
#2
Krysten W Bold, Grace Kong, Deepa R Camenga, Patricia Simon, Dana A Cavallo, Meghan E Morean, Suchitra Krishnan-Sarin
BACKGROUND: Electronic cigarette (e-cigarette) use is common among youth, and there are concerns that e-cigarette use leads to future conventional cigarette use. We examined longitudinal associations between past-month cigarette and e-cigarette use to characterize the stability and directionality of these tobacco use trajectories over time. METHODS: High school students (N = 808, 53% female) completed surveys across 3 waves (2013, 2014, and 2015) in 3 public schools in Connecticut...
December 4, 2017: Pediatrics
https://www.readbyqxmd.com/read/29174664/measuring-e-cigarette-dependence-initial-guidance
#3
Krysten W Bold, Steve Sussman, Stephanie S O'Malley, Rachel Grana, Jonathan Foulds, Howard Fishbein, Suchitra Krishnan-Sarin
E-cigarette use rates are increasing among youth and adults, despite limited knowledge about the safety, risks, and potential for this product in substituting for or reducing other tobacco use. Understanding how to characterize and assess e-cigarette dependence will be important for evaluating the public health impact of e-cigarettes and considering prevention and intervention strategies. To provide an initial review of constructs to consider when assessing e-cigarette dependence, a content expert group within the Tobacco Center for Regulatory Science (TCORS) Measurement Workgroup engaged in a review of published manuscripts and 12 tobacco dependence measures, followed by review of suggested dependence domains by a 10-person external subject-matter expert panel...
November 22, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/29159359/highly-selective-and-sensitive-chromogenic-detection-of-nerve-agents-sarin-tabun-and-vx-a-multianalyte-detection-approach
#4
Vinod Kumar, G Raviraju, Hemlata Rana, Vepa Kameswara Rao, Arvind K Gupta
A novel strategy using ferrocenyl dye (1) was developed for highly selective chromogenic detection of all nerve agents. The protocol was first established with nerve agent mimics (DFP, DCNP, and malaoxon) and then implemented on real agents, i.e. sarin, tabun and VX. The developed chemosensor showed no interferences from the most probable interferents such as acetyl chloride, sulfur mustard, oxygen mustard and DMMP. Real-time visual detection with a lower limit of detection (below LD50) made the present protocol highly appealing and versatile...
November 21, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29155110/delayed-traumatic-aortic-pseudoaneurysm-formation-causing-vertebral-body-erosion-and-back-pain-case-report-and-literature-review
#5
Justin M Cappuzzo, Kathleen E Knudson, Shawn Sarin, Joseph Babrowicz, Abraham Cherrick, Jonathan H Sherman
BACKGROUND: Aortic pseudoaneurysms are a rare cause of chronic back pain, usually due to compression of adjacent neurovasculature. It is uncommon for patients with pseudoaneurysms of the abdominal aorta to present in a delayed fashion after initial traumatic injury. CASE DESCRIPTION: We present an unusual case of delayed pseudoaneurysm formation, with subsequent erosion into the adjacent L1 vertebral body. This pseudoaneurysm was secondary to a gunshot wound with retained ballistic fragment that occurred 27 years prior...
November 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29151838/observation-and-model-based-estimates-of-particulate-dry-nitrogen-deposition-to-the-oceans
#6
Alex R Baker, Maria Kanakidou, Katye E Altieri, Nikos Daskalakis, Gregory S Okin, Stelios Myriokefalitakis, Frank Dentener, Mitsuo Uematsu, Manmohan M Sarin, Robert A Duce, James N Galloway, William C Keene, Arvind Singh, Lauren Zamora, Jean-Francois Lamarque, Shih-Chieh Hsu, Shital S Rohekar, Joseph M Prospero
Anthropogenic nitrogen (N) emissions to the atmosphere have increased significantly the deposition of nitrate (NO3(-)) and ammonium (NH4(+)) to the surface waters of the open ocean, with potential impacts on marine productivity and the global carbon cycle. Global-scale understanding of the impacts of N deposition to the oceans is reliant on our ability to produce and validate models of nitrogen emission, atmospheric chemistry, transport and deposition. In this work, ~2900 observations of aerosol NO3(-) and NH4(+) concentrations, acquired from sampling aboard ships in the period 1995 - 2012, are used to assess the performance of modelled N concentration and deposition fields over the remote ocean...
2017: Atmospheric Chemistry and Physics
https://www.readbyqxmd.com/read/29129799/post-exposure-treatment-with-the-oxime-rs194b-rapidly-reactivates-and-reverses-advanced-symptoms-of-lethal-inhaled-paraoxon-in-macaques
#7
Yvonne J Rosenberg, Jerry Wang, Tara Ooms, Narayanan Rajendran, Lingjun Mao, Xiaoming Jiang, Jonathan Lees, Lori Urban, Jeremiah Romper, Yadire Sepulveda, Yan-Jye Shyong, Palmer Taylor
Fatalities from organophosphate (OP) insecticide result from both occupational and deliberate exposure; significantly impacting human health. Like nerve agents, insecticides are neurotoxins which target and inhibit acetylcholinesterases (AChE) in central and peripheral synapses in the cholinergic nervous system. Post-exposure therapeutic countermeasures generally include administration of atropine with a pyridinium aldoximes e.g. pralidoxime, to reactivate the OP-inhibited AChE. However, commonly used oximes inefficiently cross the blood brain barrier and are rapidly cleared and their benefit is debated...
November 9, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29093271/combined-inhibition-of-atypical-pkc-and-histone-deacetylase-1-is-cooperative-in-basal-cell-carcinoma-treatment
#8
Amar N Mirza, Micah A Fry, Nicole M Urman, Scott X Atwood, Jon Roffey, Gregory R Ott, Bin Chen, Alex Lee, Alexander S Brown, Sumaira Z Aasi, Tyler Hollmig, Mark A Ator, Bruce D Dorsey, Bruce R Ruggeri, Craig A Zificsak, Marina Sirota, Jean Y Tang, Atul Butte, Ervin Epstein, Kavita Y Sarin, Anthony E Oro
Advanced basal cell carcinomas (BCCs) circumvent Smoothened (SMO) inhibition by activating GLI transcription factors to sustain the high levels of Hedgehog (HH) signaling required for their survival. Unfortunately, there is a lack of efficacious therapies. We performed a gene expression-based drug repositioning screen in silico and identified the FDA-approved histone deacetylase (HDAC) inhibitor, vorinostat, as a top therapeutic candidate. We show that vorinostat only inhibits proliferation of BCC cells in vitro and BCC allografts in vivo at high dose, limiting its usefulness as a monotherapy...
November 2, 2017: JCI Insight
https://www.readbyqxmd.com/read/29082301/youth-e-cigarette-blunt-and-other-tobacco-use-profiles-does-ses-matter
#9
Patricia Simon, Deepa R Camenga, Grace Kong, Christian M Connell, Meghan E Morean, Dana A Cavallo, Suchitra Krishnan-Sarin
OBJECTIVE: We examined the associations between socioeconomic status (SES) and adolescent polytobacco use profiles (including e-cigarettes and blunts). METHODS: Adolescents (N = 1932) completed surveys conducted in 2014 in 3 Connecticut high schools. Within a Latent Class Analysis (LCA) framework, logistic regressions examined associations between SES and polytobacco use profiles comprising never, ever, and current e-cigarette, blunt, cigarette, cigar, cigarillo, hookah, and smokeless tobacco use...
January 2017: Tobacco Regulatory Science
https://www.readbyqxmd.com/read/29082300/sources-of-electronic-cigarette-acquisition-among-adolescents-in-connecticut
#10
Grace Kong, Meghan E Morean, Dana A Cavallo, Deepa R Camenga, Suchitra Krishnan-Sarin
OBJECTIVES: We examined sources of e-cigarette acquisition among youth, and changes in these sources, between 2014 and 2015. We also assessed whether youth were ever refused the sale of e-cigarettes. METHODS: Anonymous, cross-sectional surveys conducted in five high schools in 2014 and 2015 in Connecticut assessed demographics, e-cigarette and cigarette use, and e-cigarette acquisition sources (friends/boyfriends/girlfriends, tobacco shops, siblings, online, parents/adult family members, other)...
January 2017: Tobacco Regulatory Science
https://www.readbyqxmd.com/read/29055268/early-age-of-e-cigarette-use-onset-mediates-the-association-between-impulsivity-and-e-cigarette-use-frequency-in-youth
#11
Krysten W Bold, Meghan E Morean, Grace Kong, Patricia Simon, Deepa R Camenga, Dana A Cavallo, Suchitra Krishnan-Sarin
BACKGROUND: Identifying risk factors for youth e-cigarette use is critical, given high rates of e-cigarette use and unknown health effects of long-term use. The current study examined whether an early age of onset of e-cigarette use mediates the association between impulsivity and e-cigarette frequency. METHODS: Cross-sectional survey data of e-cigarette users (n=927) were collected from 8 high schools in southeastern Connecticut. The sample was 44.7% female (mean age 16...
December 1, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29046158/e-cigarettes-impact-of-e-liquid-components-and-device-characteristics-on-nicotine-exposure
#12
Elise E DeVito, Suchitra Krishnan-Sarin
Electronic cigarettes (e-cigarettes) use has increased substantially in recent years. While e-cigarettes have been proposed as a potentially effective smoking cessation tool, dual-use in smokers is common and e-cigarettes are widely used by non-smokers, including youth and young-adult non-smokers. Nicotine, the primary addictive component in cigarettes, is present at varying levels in many e-liquids. E-cigarettes may lead to initiation of nicotine use in adult and youth non-smokers, re-initiation of nicotine dependence in ex-smokers or increased severity of nicotine dependence in dual-users of cigarettes and e-cigarettes...
October 16, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/29019446/the-role-of-the-oximes-hi-6-and-hs-6-inside-human-acetylcholinesterase-inhibited-with-nerve-agents-a-computational-study
#13
Teobaldo Cuya, Arlan da Silva Gonçalves, Jorge Alberto Valle da Silva, Teodorico C Ramalho, Kamil Kuca, Tanos C C França
The oximes 4-carbamoyl-1-[({2-[(E)-(hydroxyimino) methyl] pyridinium-1-yl} methoxy) methyl] pyridinium (known as HI-6) and 3-carbamoyl-1-[({2-[(E)-(hydroxyimino) methyl] pyridinium-1-yl} methoxy) methyl] pyridinium (known as HS-6) are isomers differing from each other only by the position of the carbamoyl group on the pyridine ring. However, this slight difference was verified to be responsible for big differences in the percentual of reactivation of acetylcholinesterase (AChE) inhibited by the nerve agents tabun, sarin, cyclosarin, and VX...
October 27, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28968411/the-effect-of-sucralose-on-flavor-sweetness-in-electronic-cigarettes-varies-between-delivery-devices
#14
Kathryn Rosbrook, Hanno C Erythropel, Tamara M DeWinter, Mark Falinski, Stephanie O'Malley, Suchitra Krishnan-Sarin, Paul T Anastas, Julie B Zimmerman, Barry G Green
The appeal of sweet electronic cigarette flavors makes it important to identify the chemical compounds that contribute to their sweetness. While volatile chemicals that produce sweet aromas have been identified in e-liquids, there are no published reports of sugars or artificial sweeteners in commercial e-liquids. However, the sweetener sucralose is marketed as an e-liquid additive to commercial flavors. The primary aims of the study were to determine if sucralose is delivered in sufficient concentration in the inhaled aerosol to enhance flavor sweetness, and whether the amount delivered depends on the e-liquid delivery system...
2017: PloS One
https://www.readbyqxmd.com/read/28962072/digest-stabilizing-selection-on-an-animal-weapon-in-a-wild-population
#15
Sarin Tiatragul, Jenna E Pruett
No abstract text is available yet for this article.
November 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28960316/genome-wide-association-study-and-meta-analysis-in-northern-european-populations-replicate-multiple-colorectal-cancer-risk-loci
#16
Tomas Tanskanen, Linda van den Berg, Niko Välimäki, Mervi Aavikko, Eivind Ness-Jensen, Kristian Hveem, Yvonne Wettergren, Elinor Bexe Lindskog, Neeme Tõnisson, Andres Metspalu, Kaisa Silander, Giulia Orlando, Philip J Law, Sari Tuupanen, Alexandra E Gylfe, Ulrika A Hänninen, Tatiana Cajuso, Johanna Kondelin, Antti-Pekka Sarin, Eero Pukkala, Pekka Jousilahti, Veikko Salomaa, Samuli Ripatti, Aarno Palotie, Heikki Järvinen, Laura Renkonen-Sinisalo, Anna Lepistö, Jan Böhm, Jukka-Pekka Mecklin, Nada A Al-Tassan, Claire Palles, Lynn Martin, Ella Barclay, Albert Tenesa, Susan M Farrington, Maria N Timofeeva, Brian F Meyer, Salma M Wakil, Harry Campbell, Christopher G Smith, Shelley Idziaszczyk, Tim S Maughan, Richard Kaplan, Rachel Kerr, David Kerr, Daniel D Buchanan, Aung K Win, John Hopper, Mark A Jenkins, Polly A Newcomb, Steve Gallinger, David Conti, Fredrick R Schumacher, Graham Casey, Jeremy P Cheadle, Malcolm G Dunlop, Ian P Tomlinson, Richard S Houlston, Kimmo Palin, Lauri A Aaltonen
Genome-wide association studies have been successful in elucidating the genetic basis of colorectal cancer (CRC), but there remains unexplained variability in genetic risk. To identify new risk variants and to confirm reported associations, we conducted a genome-wide association study in 1,701 CRC cases and 14,082 cancer-free controls from the Finnish population. A total of 9,068,015 genetic variants were imputed and tested, and 30 promising variants were studied in additional 11,647 cases and 12,356 controls of European ancestry...
September 28, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28941301/cystatin-c-predicts-acute-kidney-injury-and-mortality-in-cirrhotics-a-prospective-cohort-study
#17
Rakhi Maiwall, Awinash Kumar, Ankit Bhardwaj, Guresh Kumar, Ajeet S Bhadoria, Shiv K Sarin
BACKGROUND & AIMS: Acute kidney injury is a frequent and ominous complication in cirrhosis. An episode of AKI damages the functional nephron mass, compromising the renal functional reserve. We aimed to study the incidence of AKI, probability of subsequent episodes, whether AKI itself predisposes to future AKI and the reliability of serum cystatin C(sCyC) as a biomarker in a prospective cohort of cirrhotics. PATIENTS AND METHODS: Five hundred and thirty-one cirrhotics without ongoing AKI were followed for development/resolution of AKI...
September 23, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28915478/studying-the-interactive-effects-of-menthol-and-nicotine-among-youth-an-examination-using-e-cigarettes
#18
Suchitra Krishnan-Sarin, Barry G Green, Grace Kong, Dana A Cavallo, Peter Jatlow, Ralitza Gueorguieva, Eugenia Buta, Stephanie S O'Malley
BACKGROUND: Tobacco products containing menthol are widely used by youth. We used e-cigarettes to conduct an experimental evaluation of the independent and interactive effects of menthol and nicotine among youth. PROCEDURES: Pilot chemosensory experiments with fourteen e-cigarette users identified low (barely perceptible, 0.5%) and high (similar to commercial e-liquid, 3.5%) menthol concentrations. Sixty e-cigarette users were randomized to a nicotine concentration (0mg/ml, 6mg/ml, 12mg/ml) and participated in 3 laboratory sessions...
November 1, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28856540/liver-failure-determines-the-outcome-in-patients-of-acute-on-chronic-liver-failure-aclf-comparison-of-apasl-aclf-research-consortium-aarc-and-clif-sofa-models
#19
A Choudhury, A Jindal, R Maiwall, M K Sharma, B C Sharma, V Pamecha, M Mahtab, S Rahman, Y K Chawla, S Taneja, S S Tan, H Devarbhavi, Z Duan, Chen Yu, Q Ning, Ji Dong Jia, D Amarapurkar, C E Eapen, A Goel, S S Hamid, A S Butt, W Jafri, D J Kim, H Ghazinian, G H Lee, Ajit Sood, L A Lesmana, Z Abbas, G Shiha, D A Payawal, A K Dokmeci, J D Sollano, G Carpio, G K Lau, F Karim, P N Rao, R Moreau, P Jain, P Bhatia, G Kumar, S K Sarin
BACKGROUND AND AIMS: Acute-on-chronic liver failure (ACLF) is a progressive disease associated with rapid clinical worsening and high mortality. Early prediction of mortality and intervention can improve patient outcomes. We aimed to develop a dynamic prognostic model and compare it with the existing models. METHODS: A total of 1402 ACLF patients, enrolled in the APASL-ACLF Research Consortium (AARC) with 90-day follow-up, were analyzed. An ACLF score was developed in a derivation cohort (n = 480) and was validated (n = 922)...
September 2017: Hepatology International
https://www.readbyqxmd.com/read/28780608/sx-ella-stent-danis-effectively-controls-refractory-variceal-bleed-in-patients-with-acute-on-chronic-liver-failure
#20
Rakhi Maiwall, Kapil Dev Jamwal, Ankit Bhardwaj, Ajeet Singh Bhadoria, Jaswinder Singh Maras, Guresh Kumar, Ankur Jindal, Ashok Choudhury, Lovkesh Anand, Amrish Sahney, Awinash Kumar, Manoj Kumar Sharma, Barjesh Chander Sharma, Shiv Kumar Sarin
BACKGROUND AND AIMS: Almost 10% of bleeding episodes are refractory to combination of vasoactive agent and endotherapy, and are associated with a mortality up to 50%. Severity of liver disease and high portal pressure are mainly responsible for it. TIPS cannot be used in these patients due to high MELD score. We aimed to evaluate the efficacy of self-expandable DE stents for control of refractory variceal bleeds in patients with ACLF. METHODS: Acute-on-chronic liver failure patients (n = 88, mean age 47...
August 5, 2017: Digestive Diseases and Sciences
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