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https://www.readbyqxmd.com/read/28336726/proteomic-signature-of-acute-liver-failure-from-discovery-and-verification-in-a-pig-model-to-confirmation-in-humans
#1
Jie Wang, Zeyu Sun, Jing Jiang, Daxian Wu, Xiaoli Liu, Zhongyang Xie, Ermei Chen, Danhua Zhu, Chao Ye, Xiaoqian Zhang, Wenqian Chen, Hongcui Cao, Lanjuan Li
Acute liver failure (ALF) is a fatal condition hallmarked by rapid development. The present study aimed to describe the dynamic alterations of serum proteins associated with ALF development, and to seek for novel biomarkers of ALF. Miniature pigs (n=30) were employed to establish ALF models by infusing D-galactosamine (GALN, 1.3g/kg). A total of 1589 serum proteins were compared in pooled serum samples (n=10) before and 36 hours after GALN administration through label-free quantitation (LFQ) based shotgun proteomics...
March 23, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28334710/prevention-of-tlr9-pathway-in-warm-ischemia-in-porcine-donor-liver-after-cardiac-death
#2
Zigong Shao, Baoping Jiao, Dehui Yi, Tingting Liu, Qi Pan, Ying Cheng, Hao Liu
OBJECTIVE: To investigate effect of warm ischemia after cardiac death on activation of TLR9 pathway in porcine liver. METHODS: Donor of cardiac death (DCD) model was established with Duroc, Landrace, Large White crossbred pigs. Liver tissues from the animals were harvested at 0, 5, 10, 15, 25 and 30 minutes after warm ischemia for analysis of expression of TLR9, IRF7, IFN-β, and TNF-α at mRNA and protein levels by real-time PCR and western blot, respectively, and for assessment of NF-κB/DNA binding activity by western blot detection of p65 protein...
March 27, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28322993/intra-luminal-gene-therapy-in-the-porcine-artery-using-a-recombinant-adeno-associated-virus-9
#3
E S Rezaie, N J Visser, P F Friedrich, A Y Shin, A T Bishop
The ability to improve or restore blood flow and promote healing in ischemic tissue has many potential clinical applications. Augmentation by direct delivery of growth factors may further enhance results, but requires a method for sustained delivery. In this study, we have tested the ability of adeno-associated virus 9 (AAV9) delivered within the lumen of a porcine artery to transfect the vessel and produce a desired product. The marker chosen was green fluorescent protein (GFP) (Ke et al., 2011). In 4 farm pigs the cranial tibial artery was surgically exposed...
March 17, 2017: Gene
https://www.readbyqxmd.com/read/28321158/porcine-model-characterizing-various-parameters-assessing-the-outcome-after-acetaminophen-intoxication-induced-acute-liver-failure
#4
Karolin Thiel, Wilfried Klingert, Kathrin Klingert, Matthias H Morgalla, Martin U Schuhmann, Pamela Leckie, Yalda Sharifi, Nathan A Davies, Rajiv Jalan, Andreas Peter, Christian Grasshoff, Alfred Königsrainer, Martin Schenk, Christian Thiel
AIM: To investigate the changes of hemodynamic and laboratory parameters during the course of acute liver failure following acetaminophen overdose. METHODS: Eight pigs underwent a midline laparotomy following jejunal catheter placement for further acetaminophen intoxication and positioning of a portal vein Doppler flow-probe. Acute liver failure was realized by intrajejunal acetaminophen administration in six animals, two animals were sham operated. All animals were invasively monitored and received standardized intensive care support throughout the study...
March 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28314923/new-interventional-treatment-model-for-pancreatic-neoplasms-using-gemcitabine-eluting-hydrogel-devices-in-vitro-and-in-vivo-results
#5
Ruben Lopez-Benitez, David Benz, Yue Wu, Xinping Wu, Samuel Chen, Gregory M Cruise
OBJECTIVES: In vitro and in vivo evaluation of fast- and slow-release gemcitabine-eluting hydrogel (GEH) devices. METHODS: For in vitro elution, the GEH devices were placed in phosphate-buffered saline at 37 °C. Periodically, the solution was analyzed for gemcitabine. The devices consisting of fast release (n = 8), slow release (n = 6), or bland (n = 4) were delivered through a 5-Fr catheter into the gastroduodenal artery of a pig. Additionally, four pigs were treated with intravenous (IV) injection of gemcitabine...
March 17, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28314607/mutagenic-activities-of-biochars-from-pyrolysis
#6
Anna V Piterina, J Kevin Chipman, J Tony Pembroke, Michael H B Hayes
Biochar production, from pyrolysis of lignocellulosic feedstocks, agricultural residues, and animal and poultry manures are emerging globally as novel industrial and commercial products. It is important to develop and to validate a series of suitable protocols for the ecological monitoring of the qualities and properties of biochars. The highly sensitive Salmonella mutagenicity assays (the Ames test) are used widely by the toxicology community and, via the rat liver extract (S9), can reflect the potential for mammalian metabolic activation...
March 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28304107/the-percutaneous-toxicokinetics-of-sulphur-mustard-in-a-damaged-skin-porcine-model-and-the-evaluation-of-woundstat%C3%A2-as-a-topical-decontaminant
#7
Charlotte A Hall, Helen L Lydon, Christopher H Dalton, J Kevin Chipman, John S Graham, Robert P Chilcott
This study used a damaged skin, porcine model to evaluate the in vivo efficacy of WoundStat™ for decontamination of superficial (non-haemorrhaging), sulphur mustard-contaminated wounds. The dorsal skin of 12 female pigs was subjected to controlled physical damage and exposed to 10 μL (14) C-radiolabelled sulphur mustard ((14) C-SM). Animals were randomly assigned to either a control or a treatment group. In the latter, WoundStat™ was applied 30 s post exposure and left in situ for 1 h. Skin lesion progression and decontaminant efficacy were quantified over 6 h using a range of biophysical measurements...
March 17, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28273656/animal-models-for-associating-liver-partition-and-portal-vein-ligation-for-staged-hepatectomy-alpps-achievements-and-future-perspectives
#8
Andras Budai, Andras Fulop, Oszkar Hahn, Peter Onody, Tibor Kovacs, Tibor Nemeth, Miklos Dunay, Attila Szijarto
BACKGROUND: Since 2012, Associated Liver Partition and Portal vein ligation for Staged hepatectomy (ALPPS) has been standing in the limelight of modern liver surgery and numerous questions have been raised regarding this novel approach. On the one hand, ALPPS has proved to be a valuable method in the treatment of hepatic tumors, while on the other hand, there are many controversies, such as high mortality and morbidity rates. Further surgical research is essential for a better understanding of underlying mechanisms and for enhancing patient safety...
March 9, 2017: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
https://www.readbyqxmd.com/read/28270811/animal-models-of-leptospirosis-of-mice-and-hamsters
#9
REVIEW
Maria Gomes-Solecki, Ignacio Santecchia, Catherine Werts
Pathogenic Leptospira sp. are spirochetal bacteria responsible for leptospirosis, an emerging worldwide zoonosis. These spirochetes are very successful pathogens that infect a wide range of hosts such as fish, reptiles, birds, marsupials, and mammals. Transmission occurs when chronically infected animals excrete live bacteria in their urine, contaminating the environment. Leptospira sp. enter their hosts through damaged skin and mucosa. Chronically infected rats and mice are asymptomatic and are considered as important reservoirs of the disease...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28257428/dietary-protein-induced-hepatic-igf-1-secretion-mediated-by-ppar%C3%AE-activation
#10
Xiaojuan Wan, Songbo Wang, Jingren Xu, Lu Zhuang, Kongping Xing, Mengyuan Zhang, Xiaotong Zhu, Lina Wang, Ping Gao, Qianyun Xi, Jiajie Sun, Yongliang Zhang, Tiejun Li, Gang Shu, Qingyan Jiang
Dietary protein or amino acid (AA) is a crucial nutritional factor to regulate hepatic insulin-like growth factor-1 (IGF-1) expression and secretion. However, the underlying intracellular mechanism by which dietary protein or AA induces IGF-1 expression remains unknown. We compared the IGF-1 gene expression and plasma IGF-1 level of pigs fed with normal crude protein (CP, 20%) and low-protein levels (LP, 14%). RNA sequencing (RNA-seq) was performed to detect transcript expression in the liver in response to dietary protein...
2017: PloS One
https://www.readbyqxmd.com/read/28254522/regulation-of-11%C3%AE-hydroxysteroid-dehydrogenase-type-1-following-caloric-restriction-and-re-feeding-is-species-dependent
#11
Christine Loerz, Claudia Staab-Weijnitz, Patricia Huebbe, Katrin Giller, Cornelia Metges, Gerald Rimbach, Edmund Maser
Evidence in the current literature suggests that expression and activity of 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1), a key regulatory enzyme in glucocorticoid metabolism, is elevated in the liver and reduced in visceral adipose tissue and skeletal muscle following caloric restriction (CR). In order to investigate the influence of CR on 11β-HSD1 in more detail, we assessed expression and activity of 11β-HSD1 in several tissues in two independent CR and re-feeding animal models. Levels and activity of 11β-HSD1 after CR and re-feeding were measured [mouse liver and pig liver, pig visceral adipose tissue and pig skeletal muscle] using semi-quantitative RT-PCR, Western Blot analysis, and HPLC...
February 27, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28197649/dose-response-relationship-of-temozolomide-determined-by-the-pig-a-comet-and-micronucleus-assay
#12
M Guérard, G Johnson, S Dertinger, G Duran-Pacheco, J Funk, A Zeller
Temozolomide (TMZ), a monofunctional alkylating agent, was selected as a model compound to determine its quantitative genotoxic dose-response relationship in different tissues (blood, liver, and jejunum) and endpoints [Pig-a-, comet-, and micronucleus assay (MNT)] in male rats. TMZ was administered p.o. over 5 consecutive days (day 1-5), followed by a treatment-free period of 50 days (day 6-56) and a final administration prior to necropsy (day 57-59). TMZ showed a dose-dependent increase in DNA damage in all interrogated endpoints...
February 15, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28187951/omp16-based-vaccine-encapsulated-by-alginate-chitosan-microspheres-provides-significant-protection-against-haemophilus-parasuis-in-mice
#13
Xintian Zheng, Xiaoyan Yang, Xiaohua Li, Guo-Hua Qiu, Ailing Dai, Qichun Huang, Cuiqin Huang, Xiaofeng Guo
Haemophilus parasuis (H. parasuis) is the etiological agent of swine Glässer's disease, which leads to significant economic loss in swine industry over the world. Subunit vaccine based on outer membrane protein is one of the promising choices to protect pigs against H. parasuis infection despite low immunity efficiency. In this paper, outer membrane protein 16 (Omp16) of H. parasuis encapsulated by alginate-chitosan microspheres as antigen carriers was explored for the first time in a mouse model. Our results showed that the microspheres with Omp16 induced significant higher H...
February 7, 2017: Vaccine
https://www.readbyqxmd.com/read/28182785/virulence-and-immunogenicity-of-genetically-defined-human-and-porcine-isolates-of-m-avium-subsp-hominissuis-in-an-experimental-mouse-infection
#14
Nicolas Bruffaerts, Christelle Vluggen, Virginie Roupie, Lucille Duytschaever, Christophe Van den Poel, Joseph Denoël, Ruddy Wattiez, Jean-Jacques Letesson, David Fretin, Leen Rigouts, Ophélie Chapeira, Vanessa Mathys, Claude Saegerman, Kris Huygen
Mycobacterium avium subsp. hominissuis (Mah) represents a health concern for humans and to a lesser extent for pigs, but its zoonotic potential remains elusive. Using multispacer sequence typing (MST) we previously identified 49 different genotypes of Mah among Belgian clinical and porcine isolates, with 5 MSTs shared by both hosts. Using experimental intranasal infection of BALB/c mice, we compared the virulence and immunogenicity of porcine and clinical human isolates with shared genotype or with a genotype only found in humans or pigs...
2017: PloS One
https://www.readbyqxmd.com/read/28182434/a-model-based-approach-to-assessing-the-importance-of-intracellular-binding-sites-in-doxorubicin-disposition
#15
Ilse R Dubbelboer, Elsa Lilienberg, Erik Sjögren, Hans Lennernäs
Doxorubicin is an anticancer agent, which binds reversibly to topoisomerase I and II, intercalates to DNA base pairs, and generates free radicals. Doxorubicin has a high tissue:plasma partition coefficient and high intracellular binding to the nucleus and other subcellular compartments. The metabolite doxorubicinol has an extensive tissue distribution. This porcine study investigated whether the traditional implementation of tissue binding, described by the tissue:plasma partition coefficient (Kp,t), could be used to appropriately analyze and/or simulate tissue doxorubicin and doxorubicinol concentrations in healthy pigs, when applying a physiologically based pharmacokinetic (PBPK) model approach, or whether intracellular binding is required in the semi-PBPK model...
February 23, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28177652/irreversible-electroporation-defining-the-mri-appearance-of-the-ablation-zone-with-histopathologic-correlation-in-a-porcine-liver-model
#16
Ely R Felker, Isabel Dregely, Dong Jin Chung, Kyunghyun Sung, Ferdnand C Osuagwu, Charles Lassman, James Sayre, Holden Wu, David S Lu
OBJECTIVE: The purpose of this study is to evaluate the MRI appearance of the irreversible electroporation zone in porcine liver, with histopathologic correlation. MATERIALS AND METHODS: Nine irreversible electroporation ablations were percutaneously created in two Yorkshire pigs. Irreversible electroporation was performed with a bipolar 16-gauge electrode with 3-cm exposure tip and fixed 8-mm interpolar distance. Gadoxetate disodium-enhanced 3-T MRI was performed 50 hours after irreversible electroporation...
February 8, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28167864/ezetimibe-reduces-cholesterol-content-and-nf-kappab-activation-in-liver-but-not-in-intestinal-tissue-in-guinea-pigs
#17
Peter Fraunberger, Elisabeth Gröne, Hermann-Josef Gröne, Heinz Drexel, Autar K Walli
BACKGROUND: Statins (HMG CoA reductase inhibitors), in addition to reducing circulating cholesterol and incidence of coronary heart disease, also have pleiotropic, anti-inflammatory effects. Patients with chronic liver diseases, non-alcoholic fatty liver disease (NAFLD) or hepatitis C are often excluded from statin therapy because of adverse effects in a small cohort of patients despite increased cardiovascular risk cholesterol. Ezetimibe, which inhibits cholesterol absorption by inhibition of Niemann-Pick C1 like 1 (NPC1L1) protein in the brush border of intestinal cells, has been suggested as a new therapeutic option in these patients...
2017: Journal of Inflammation
https://www.readbyqxmd.com/read/28157787/nonclinical-evaluation-of-the-new-topical-hemostatic-agent-tt-173-for-skin-grafting-procedures
#18
Santiago Rojas Codina, José Raúl Herance, Alberto Centeno, Javier Valero, Belén Arias, Ignasi Miquel, Pilar Sánchez, Esther Rincón, Ramón López, Jesús Murat
Blood loss during grafting surgery represents a major concern of this procedure and the development of hemostatic agents for this indication is highly desirable. TT-173 is the first biologically active treatment based on tissue factor instead of thrombin. This study sought to investigate the efficacy, systemic absorption, and toxicology of TT-173 in animal models to support clinical evaluation of the product in donor sites of patients subjected to skin grafting. Procoagulant efficacy of 148 μg of TT-173 was evaluated in pigs in presence and absence of anticoagulant treatment with unfractioned heparin...
January 31, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28151798/modulating-portal-hemodynamics-with-vascular-ring-allows-efficient-regeneration-after-partial-hepatectomy-in-a-porcine-model
#19
Petru O Bucur, Mohamed Bekheit, Chloe Audebert, Amnah Othman, Seddik Hammad, Mylene Sebagh, Marc-Antoine Allard, Benoît Decante, Adrian Friebel, Elodie Miquelestorena-Standley, Dirk Drasdo, Jan G Hengstler, Irene E Vignon-Clementel, Eric Vibert
OBJECTIVE: To investigate safety and efficacy of temporary portal hemodynamics modulation with a novel percutaneously adjustable vascular ring (MID-AVR) onto a porcine model of 75% hepatectomy. BACKGROUND: Postoperative liver failure is a leading cause of mortality after major hepatectomy. Portal flow modulation is an increasingly accepted concept to prevent postoperative liver failure. Nonetheless, the current strategies have shortcomings. METHODS: Resection was performed under hemodynamic monitoring in 17 large, white pigs allocated into 2 groups...
February 1, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28126682/a-multi-species-evaluation-of-the-radiation-dosimetry-of-11-c-erlotinib-the-radiolabeled-analog-of-a-clinically-utilized-tyrosine-kinase-inhibitor
#20
J Ryan Petrulli, Søren B Hansen, Galith Abourbeh, Maqsood Yaqub, Idris Bahce, Daniel Holden, Yiyun Huang, Nabeel B Nabulsi, Joseph N Contessa, Eyal Mishani, Adriaan A Lammertsma, Evan D Morris
INTRODUCTION: Erlotinib is a tyrosine kinase inhibitor prescribed for non-small cell lung cancer (NSCLC) patients bearing epidermal growth factor receptor mutations in the kinase domain. The objectives of this study were to (1) establish a human dosimetry profile of [(11)C]erlotinib and (2) assess the consistency of calculated equivalent dose across species using the same dosimetry model. METHODS: Subjects examined in this multi-species study included: a stage IIIa NSCLC patient, 3 rhesus macaque monkeys, a landrace pig, and 4 athymic nude-Fox1nu mice...
April 2017: Nuclear Medicine and Biology
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