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https://www.readbyqxmd.com/read/28916286/toxicology-studies-of-primycin-sulphate-using-a-three-dimensional-3d-in-vitro-human-liver-aggregate-model
#1
Ágota Pénzes, Elhusseiny Mohamed Mahmud Abdelwahab, Judit Rapp, Zsanett A Péteri, Judit Bovári-Biri, Csaba Fekete, György Miskei, Krisztián Kvell, Judit E Pongrácz
Primycin-sulphate is a highly effective compound against Gram (G) positive bacteria. It has a potentially synergistic effect with vancomycin and statins which makes primycin-sulphate a potentially very effective preparation. Primycin-sulphate is currently used exclusively in topical preparations such as in in vitro animal hepatocyte and neuromuscular junction studies (in mice, rats, snakes, frogs) as well as in in vitro human red blood cell experiments. During these studies, the use of primycin-sulphate resulted in reduced cellular membrane integrity and modified ion channel activity...
September 12, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28914008/linearly-chirped-fiber-bragg-grating-response-to-thermal-gradient-from-bench-tests-to-the-real-time-assessment-during-in-vivo-laser-ablations-of-biological-tissue
#2
Paola Saccomandi, Ambra Varalda, Riccardo Gassino, Daniele Tosi, Carlo Massaroni, Michele A Caponero, Raoul Pop, Sanzhar Korganbayev, Guido Perrone, Michele Diana, Alberto Vallan, Guido Costamagna, Jacques Marescaux, Emiliano Schena
The response of a fiber optic sensor [linearly chirped fiber Bragg grating (LCFBG)] to a linear thermal gradient applied on its sensing length (i.e., 1.5 cm) has been investigated. After these bench tests, we assessed their feasibility for temperature monitoring during thermal tumor treatment. In particular, we performed experiments during ex vivo laser ablation (LA) in pig liver and in vivo thermal ablation in animal models (pigs). We investigated the following: (i) the relationship between the full width at half maximum of the LCFBG spectrum and the temperature difference among the extremities of the LCFBG and (ii) the relationship between the mean spectrum wavelength and the mean temperature acting on the LCFBG sensing area...
September 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28913560/deregulation-of-obesity-relevant-genes-is-associated-with-progression-in-bmi-and-the-amount-of-adipose-tissue-in-pigs
#3
Caroline M Junker Mentzel, Tainã Figueiredo Cardoso, Christian Bressen Pipper, Mette Juul Jacobsen, Claus Bøttcher Jørgensen, Susanna Cirera, Merete Fredholm
The aim of this study was to elucidate the relative impact of three phenotypes often used to characterize obesity on perturbation of molecular pathways involved in obesity. The three obesity-related phenotypes are (1) body mass index (BMI), (2) amount of subcutaneous adipose tissue (SATa), and (3) amount of retroperitoneal adipose tissue (RPATa). Although it is generally accepted that increasing amount of RPATa is 'unhealthy', a direct comparison of the relative impact of the three obesity-related phenotypes on gene expression has, to our knowledge, not been performed previously...
September 14, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28893253/a-novel-swine-model-for-evaluation-of-dyslipidemia-and-atherosclerosis-induced-by-human-cetp-overexpression
#4
Tao Chen, Meng Sun, Jia-Qiang Wang, Jin-Jin Cui, Zhong-Hua Liu, Bo Yu
BACKGROUND: The mechanism of cholesteryl ester transfer protein (CETP) in lipid metabolism is still unclear. Furthermore, the relationship of CETP and atherosclerosis (AS) has been controversial. As pigs are a good model for both lipid and AS research, we investigated the lipid metabolism of human CETP (hCETP) transgenic pigs and explored the mechanism of CETP in lipid modulation. METHODS: Plasmids expressing the hCETP gene were designed, successfully constructed, and transfected into porcine fetal fibroblasts by liposomes...
September 11, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28857806/reversing-dabigatran-anticoagulation-with-prothrombin-complex-concentrate-versus-idarucizumab-as-part-of-multimodal-hemostatic-intervention-in-an-animal-model-of-polytrauma
#5
Markus Honickel, Till Braunschweig, Rolf Rossaint, Christian Stoppe, Hugo Ten Cate, Oliver Grottke
BACKGROUND: Although idarucizumab is the preferred treatment for urgent dabigatran reversal, it is not always available. Prothrombin complex concentrate (PCC) may be an alternative and, with bleeding in trauma, additional hemostatic therapy may be required. The authors investigated multimodal treatment in a preclinical polytrauma model. METHODS: Dabigatran etexilate (30 mg/kg twice daily) was given orally to 45 male pigs for 3 days. On day 4, animals received a dabigatran infusion before blunt liver injury and bilateral femur fractures...
August 30, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28846576/blood-and-tissue-silver-levels-following-application-of-silver-based-dressings-to-sulfur-mustard-chemical-burns
#6
David J Barillo, Claire R Croutch, Frances Reid, Tara Culley, William Sosna, Julie Roseman
Silver-based dressings are commonly used in burn care. Silver sulfadiazine use is associated with elevated blood, urine, and tissue levels of silver ion. We examined wound and tissue levels of silver ion in a two-species model of sulfur mustard chemical burn injury treated with two different silver-based dressings. Superficial dermal and moderate thickness dermal chemical burns were induced in 16 hairless guinea pigs and in 16 Gottingen minipigs by exposure to sulfur mustard vapor. After debridement, silver-nylon burn dressings or silver-calcium alginate dressings were applied and changed every 7 days until wound healing or a maximum of 60 days post exposure...
September 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28837849/isolation-and-molecular-cloning-of-hepatocyte-growth-factor-from-guinea-pig-ghgf-and-expression-of-truncated-variant-of-ghgf-with-improved-anti-fibrotic-activity-in-escherichia-coli
#7
Haifeng Liu, Xiaohua Wang, Ruijie Han, Kuiyang Zuo, Xiaohuan Yuan, Yuting Li, Jinglin Zhou, Lei Yan, Yanhui Chu
Hepatocyte growth factor (HGF) is an attractive target for anti-fibrotic therapy because it attenuates excessive transforming growth factor-β1 (TGF-β1) which plays an important role in hepatic fibrosis. In the study, we reported on the isolation and molecular cloning of the open reading frame (ORF) of guinea pig HGF (gHGF), encoding a protein of 729 amino acids, with an apple-like (hairpin) domain, four kringle domains and a trypsin-like serine protease domain. Moreover, the truncated variant of gHGF (a double mutant of N-terminal hairpin and first kringle domains of gHGF, K132E and G134E, gmNK1) protein fused with His6 tag, the molecular weight of which was about 20...
August 21, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28769560/non-immunogenic-dextran-coated-superparamagnetic-iron-oxide-nanoparticles-a-biocompatible-size-tunable-contrast-agent-for-magnetic-resonance-imaging
#8
Harald Unterweger, Christina Janko, Marc Schwarz, László Dézsi, Rudolf Urbanics, Jasmin Matuszak, Erik Őrfi, Tamás Fülöp, Tobias Bäuerle, János Szebeni, Clément Journé, Aldo R Boccaccini, Christoph Alexiou, Stefan Lyer, Iwona Cicha
Iron oxide-based contrast agents have been in clinical use for magnetic resonance imaging (MRI) of lymph nodes, liver, intestines, and the cardiovascular system. Superparamagnetic iron oxide nanoparticles (SPIONs) have high potential as a contrast agent for MRI, but no intravenous iron oxide-containing agents are currently approved for clinical imaging. The aim of our work was to analyze the hemocompatibility and immuno-safety of a new type of dextran-coated SPIONs (SPIONdex) and to characterize these nanoparticles with ultra-high-field MRI...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28766271/rapid-liver-hypertrophy-after-portal-vein-occlusion-correlates-with-the-degree-of-collateralization-between-lobes-a-study-in-pigs
#9
Rebecca Deal, Charles Frederiks, Lauren Williams, Pim B Olthof, Konstantin Dirscherl, Xavier Keutgen, Edie Chan, Daniel Deziel, Martin Hertl, Erik Schadde
BACKGROUND: Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) induces more rapid liver growth than portal vein ligation (PVL). Transection of parenchyma in ALPPS may prevent the formation of collaterals between lobes. The aim of this study was to determine if abrogating the formation of collaterals through parenchymal transection impacted growth rate. METHODS: Twelve Yorkshire Landrace pigs were randomized to undergo ALPPS, PVL, or "partial ALPPS" by varying degrees of parenchymal transection...
August 1, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28755199/fah-knockout-animals-as-models-for-therapeutic-liver-repopulation
#10
Markus Grompe
Several animal models of Fah deficiency have been developed, including mice, pigs and most recently rats. Initially, the murine models were developed with the intent to mirror the human disease for pathophysiologic and therapeutic studies. However, it soon became apparent that Fah-positive hepatocytes have a potent selective growth advantage in mutant liver and can extensively repopulate the diseased organ. For this reason, Fah mutant mice have become a workhorse for liver biology and are widely used in liver stem cell and hepatic gene therapy research...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28752056/the-munich-midy-pig-biobank-a-unique-resource-for-studying-organ-crosstalk-in-diabetes
#11
Andreas Blutke, Simone Renner, Florian Flenkenthaler, Mattias Backman, Serena Haesner, Elisabeth Kemter, Erik Ländström, Christina Braun-Reichhart, Barbara Albl, Elisabeth Streckel, Birgit Rathkolb, Cornelia Prehn, Alessandra Palladini, Michal Grzybek, Stefan Krebs, Stefan Bauersachs, Andrea Bähr, Andreas Brühschwein, Cornelia A Deeg, Erica De Monte, Michaela Dmochewitz, Caroline Eberle, Daniela Emrich, Robert Fux, Frauke Groth, Sophie Gumbert, Antonia Heitmann, Arne Hinrichs, Barbara Keßler, Mayuko Kurome, Miriam Leipig-Rudolph, Kaspar Matiasek, Hazal Öztürk, Christiane Otzdorff, Myriam Reichenbach, Horst Dieter Reichenbach, Alexandra Rieger, Birte Rieseberg, Marco Rosati, Manuel Nicolas Saucedo, Anna Schleicher, Marlon R Schneider, Kilian Simmet, Judith Steinmetz, Nicole Übel, Patrizia Zehetmaier, Andreas Jung, Jerzy Adamski, Ünal Coskun, Martin Hrabě de Angelis, Christian Simmet, Mathias Ritzmann, Andrea Meyer-Lindenberg, Helmut Blum, Georg J Arnold, Thomas Fröhlich, Rüdiger Wanke, Eckhard Wolf
OBJECTIVE: The prevalence of diabetes mellitus and associated complications is steadily increasing. As a resource for studying systemic consequences of chronic insulin insufficiency and hyperglycemia, we established a comprehensive biobank of long-term diabetic INS(C94Y) transgenic pigs, a model of mutant INS gene-induced diabetes of youth (MIDY), and of wild-type (WT) littermates. METHODS: Female MIDY pigs (n = 4) were maintained with suboptimal insulin treatment for 2 years, together with female WT littermates (n = 5)...
August 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28728397/effects-of-dietary-valine-lysine-ratio-on-the-performance-amino-acid-composition-of-tissues-and-mrna-expression-of-genes-involved-in-branched-chain-amino-acid-metabolism-of-weaned-piglets
#12
Yetong Xu, Xiaokang Ma, Chunli Wang, Mingfeng Yuan, Xiangshu Piao
Objective: The goal of this study was to investigate the effects of dietary standard ileal digestible (SID) valine:lysine ratios on performance, intestinal morphology, amino acids of liver and muscle, plasma indices and mRNA expression of branched-chain amino acid (BCAA) metabolism enzymes. Methods: A total of 144 crossbred pigs (Duroc × Landrace × Large White) weaned at 28 ± 4 days of age (8.79 ± 0.02 kg body weight) were randomly allotted to 1 of 4 diets formulated to provide SID valine: lysine ratios of 50, 60, 70 or 80%...
May 14, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28715950/efficacy-of-the-novel-medical-adhesive-mar-vivo-107-in-an-acute-porcine-liver-resection-model
#13
Hirokazu Tanaka, Kenji Fukushima, Pramod Kadaba Srinivasan, Kerstin Pawlowsky, Babette Koegel, Koichiro Hata, Yonson Ku, Shinji Uemoto, René H Tolba
BACKGROUND: Despite modern surgical techniques, insufficient hemostasis after liver trauma is still a major cause of morbidity and mortality after injury. Therefore, efficient hemostatic agents are indicated. In this study, we evaluated the hemostatic efficacy of a novel synthetic wound adhesive (MAR-VIVO-107) based on polyurethane/polyurea, compared with a widely used fibrin adhesive (Tisseel). MATERIALS AND METHODS: Twelve German Landrace pigs were randomly assigned to 2 groups...
July 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28714241/cytokine-profiles-in-tibetan-macaques-following-%C3%AE-1-3-galactosyltransferase-knockout-pig-liver-xenotransplantation
#14
Zhuochao Zhang, Xiao Li, Hong Zhang, Xuan Zhang, Hui Chen, Dengke Pan, Hongchen Ji, Liang Zhou, Juan Ling, Jingshi Zhou, Shuqiang Yue, Desheng Wang, Zhaoxu Yang, Kaishan Tao, Kefeng Dou
BACKGROUND: Pig-to-nonhuman primate orthotopic liver xenotransplantation is often accompanied by thrombocytopenia and coagulation disorders. Furthermore, the release of cytokines can trigger cascade reactions of coagulation and immune attacks within transplant recipients. To better elucidate the process of inflammation in liver xenograft recipients, we utilized a modified heterotopic auxiliary liver xenotransplantation model for xeno-immunological research. We studied the cytokine profiles and the relationship between cytokine levels and xenograft function after liver xenotransplantation...
July 17, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28711432/inactivated-orf-virus-shows-disease-modifying-antiviral-activity-in-a-guinea-pig-model-of-genital-herpesvirus-infection
#15
Astrid Friebe, Angela Siegling, Olaf Weber
BACKGROUND: Inactivated Orf virus (iORFV) has been used as a preventative as well as a therapeutic immunomodulator in veterinary medicine in different species. iORFV elicits strong effects on cytokine secretion in mice and human immune cells leading to an auto-regulated loop of initial up-regulation of inflammatory and Th1-related cytokines followed by Th2-related cytokines that attenuate immunopathology. The therapeutic potential of iORFV has been recognized in several models for difficult-to-treat disease areas such as chronic viral diseases, liver fibrosis or various forms of cancer...
June 27, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28683896/analysis-of-the-biliostatic-potential-of-two-sealants-in-a-standardized-porcine-model-of-liver-resection
#16
H Fonouni, A Kashfi, O Stahlheber, L Konstantinidis, T W Kraus, A Mehrabi, H Oweira
BACKGROUND: Improved resection techniques has decreased mortality rate following liver resections(LRx). Sealants are known as effective adjuncts for haemostasis after LRx. We compared biliostatic effectiveness of two sealants in a standardized porcine model of LRx. MATERIAL AND METHODS: We accomplished left hemihepatectomy on 27 pigs. The animals were randomized in control group(n = 9) with no sealant and treatment groups (each n = 9), in which resection surfaces were covered with TachoSil(®) and TissuFleece(®)/Tissucol Duo(®)...
July 1, 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/28679339/characteristics-of-a-pseudomonas-aeruginosa-induced-porcine-sepsis-model-for-multi-organ-metabolic-flux-measurements
#17
Gabriella A M Ten Have, Renske C I Deutz, Mariëlle P K J Engelen, Robert R Wolfe, Nicolaas E P Deutz
Survival of sepsis is related to loss of muscle mass. Therefore, it is imperative to further define and understand the basic alterations in nutrient metabolism in order to improve targeted sepsis nutritional therapies. We developed and evaluated a controlled hyperdynamic severe sepsis pig model that can be used for in vivo multi-organ metabolic studies in a conscious state. In this catheterized pig model, bacteremia was induced intravenously with 10(9) CFU/h Pseudomonas aeruginosa (PA) in 13 pigs for 18 h...
January 1, 2017: Laboratory Animals
https://www.readbyqxmd.com/read/28677852/the-tissue-residues-of-sodium-dehydroacetate-used-as-feed-preservative-in-swine
#18
Hao Liu, Lingling Han, Jiayu Xie, Yingchao Wu, Yang Xie, Yumei Zhang
BACKGROUND: Sodium dehydroacetate (Na-DHA) is a food and feed additive with antimicrobial effects. There is little information on Na-DHA residue levels in foods derived from animals. In this study, Na-DHA residue levels in swine tissues were determined by HLPC, and the pharmacokinetics of Na-DHA in tissues were determined. RESULTS: The Na-DHA residue levels in swine tissues were < 1.2 mg kg(-1) at different withdrawal time after thirty-two Duroc × Landrace × Yorkshire pigs were administered 200 mg Na-DHA kg(-1) through the feed for 30 d...
July 5, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28677045/evaluation-of-an-advanced-organ-support-advos-system-in-a-two-hit-porcine-model-of-liver-failure-plus-endotoxemia
#19
Ahmed Al-Chalabi, Edouard Matevossian, Anne von Thaden, Catherine Schreiber, Peter Radermacher, Wolfgang Huber, Aritz Perez Ruiz de Garibay, Bernhard Kreymann
BACKGROUND: Novel extracorporeal procedures are constantly being developed and evaluated for use in patients with sepsis. Preclinical evaluation of such procedures usually requires testing in large animal models. In the present work, the safety and efficacy of a recently developed ADVanced Organ Support (ADVOS) system in a newly developed large animal two-hit model of liver failure combined with endotoxemia were tested. METHODS: After establishing the model in more than 50 animals, a randomized study was performed...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28672987/evaluation-of-the-safety-of-irreversible-electroporation-on-the-stomach-wall-using-a-pig-model
#20
Jiannan Li, Jianying Zeng, Jibing Chen, Jian Shi, Xiaomei Luo, Gang Fang, Wei Chai, Wenlong Zhang, Tongjun Liu, Lizhi Niu
The aim of the present study was to evaluate the effects of irreversible electroporation (IRE) on the stomach wall following the direct application of IRE onto the organ surface. IRE ablation was performed in 8 Tibetan mini-pigs, which were randomly assigned into two groups based on their ablated areas: Group A, gastric cardia, fundus of stomach, gastric body and group B, lesser gastric curvature, greater gastric curvature, stomach pylorus. Two IRE needles were placed in the space between the stomach wall and the liver (not inserted into the stomach tissue), and three lesions were created in each pig...
July 2017: Experimental and Therapeutic Medicine
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