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https://www.readbyqxmd.com/read/29793088/decellularized-and-matured-esophageal-scaffold-for-circumferential-esophagus-replacement-proof-of-concept-in-a-pig-model
#1
Guillaume Luc, Guillaume Charles, Caroline Gronnier, Magali Cabau, Charlotte Kalisky, Mallory Meulle, Reine Bareille, Samantha Roques, Lionel Couraud, Johanna Rannou, Laurence Bordenave, Denis Collet, Marlène Durand
Surgical resection of the esophagus requires sacrificing a long portion of it. Its replacement by the demanding gastric pull-up or colonic interposition techniques may be avoided by using short biologic scaffolds composed of decellularized matrix (DM). The aim of this study was to prepare, characterize, and assess the in vivo remodeling of DM and its clinical impact in a preclinical model. A dynamic chemical and enzymatic decellularization protocol of porcine esophagus was set up and optimized. The resulting DM was mechanically and biologically characterized by DNA quantification, histology, and histomorphometry techniques...
May 17, 2018: Biomaterials
https://www.readbyqxmd.com/read/29793057/ellagic-acid-protects-from-myelin-associated-sphingolipid-loss-in-experimental-autoimmune-encephalomyelitis
#2
Rebeca Busto, Jorge Serna, Aránzazu Perianes-Cachero, Rocío Quintana-Portillo, David García-Seisdedos, Alberto Canfrán-Duque, Carlos L Paino, Milagros Lerma, María E Casado, Antonia Martín-Hidalgo, Eduardo Arilla-Ferreiro, Miguel A Lasunción, Óscar Pastor
Experimental autoimmune encephalomyelitis (EAE), the most common model for multiple sclerosis, is characterized by inflammatory cell infiltration into the central nervous system and demyelination. Previous studies have demonstrated that administration of some polyphenols may reduce the neurological alterations of EAE. In this work, we show that ellagic acid, a polyphenolic compound, is beneficial in EAE, most likely through stimulation of ceramide biosynthesis within the brain. EAE was induced in Lewis rats by injection of guinea-pig spinal cord tissue along with Freund's complete adjuvant containing Mycobacterium tuberculosis...
May 21, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29792989/novel-genotypes-and-multilocus-genotypes-of-enterocytozoon-bieneusi-in-pigs-in-northwestern-china-a-public-health-concern
#3
Sha-Sha Wang, Jun-Qiang Li, Yun-Hui Li, Xiang-Wei Wang, Xian-Chen Fan, Xin Liu, Zi-Juan Li, Jun-Ke Song, Long-Xian Zhang, Guang-Hui Zhao
Enterocytozoon bieneusi, the most important and common microsporidian species, inhabits in most animals and humans causing diarrhea and systemic diseases. The objectives of the present study were to examine the prevalence and genetic variability of E. bieneusi in pigs in Shaanxi province, northwestern China. A total of 560 pig faecal samples were collected from five different farms in Shaanxi province and molecularly characterized using multilocus genotyping (MLST) technology. High E. bieneusi infection rate (78...
May 21, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29792943/the-development-of-a-screening-protocol-for-salmonella-spp-and-enteropathogenic-yersinia-spp-in-samples-from-wild-boar-sus-scrofa-also-generating-mlva-data-for-y-enterocolitica-and-y-pseudotuberculosis
#4
Axel Sannö, Magdalena Jacobson, Sandra Sterner, Susanne Thisted-Lambertz, Anna Aspán
Salmonellosis and yersiniosis are notifiable human diseases that are commonly associated with contaminated food. Domestic pigs as well as wild boars and other wild-life have been identified as reservoirs of these bacteria. Methods for cultivation and molecular epidemiological investigations of Salmonella spp. are well established, however, cultivation of enteropathogenic Yersinia spp. is time- consuming and the commonly used method for molecular epidemiological investigations, pulsed-field gel electrophoresis, lack in discriminatory power...
May 21, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29792924/creation-of-an-acellular-vaginal-matrix-for-potential-vaginal-augmentation-and-cloacal-repair
#5
K V Greco, L G Jones, I Obiri-Yeboa, T Ansari
STUDY OBJECTIVE: our aim was to use porcine vagina to create a vaginal matrix and test its cellular biocompatibility. DESIGN: vagina was harvested from pigs and de-cellularised (DC) using a combination of detergents (Triton x-100 and sodium deoxycholate) and enzymes (DNAse/RNAse). INTERVENTIONS: the presence of cellular material, collagen structural integrity and basement membrane proteins were assessed histologically. To address cytocompatibility, porcine adipose derived-mesenchymal stem cells (AD-MSC) were harvested from abdominal fat together with vaginal epithelial cells (VEC) and seeded onto the mucosal aspect of the vaginal scaffold...
May 21, 2018: Journal of Pediatric and Adolescent Gynecology
https://www.readbyqxmd.com/read/29792900/the-sulfoconjugation-of-androstenone-and-dehydroepiandrosterone-by-human-and-porcine-sulfotransferase-enzymes
#6
Heidi Laderoute, Christine Bone, E James Squires
Porcine sulfotransferase 2A1 (pSULT2A1) is a key enzyme involved in the testicular and hepatic sulfoconjugation of steroids such as dehydroepiandrosterone (DHEA) and potentially androstenone. This latter steroid is a major cause of boar taint, which is an unpleasant off-odour and off-flavour in pork from male pigs. Sulfotransferase 2B1 (pSULT2B1) may also be important, although no direct evidence exists for its involvement in sulfoconjugation of steroids. The purpose of this study was to investigate the sulfoconjugation activity of human and porcine sulfotransferases towards DHEA and androstenone...
May 21, 2018: Steroids
https://www.readbyqxmd.com/read/29792875/modelling-the-skip-and-resurgence-of-japanese-encephalitis-epidemics-in-hong-kong
#7
Shi Zhao, Yijun Lou, Alice P Y Chiu, Daihai He
Japanese encephalitis virus (JEV) is a zoonotic mosquito-borne virus, persisting in pigs, Ardeid birds and Culex mosquitoes. It is endemic to China and Southeastern Asia. The case-fatality ratio (CFR) or the rate of permanent psychiatric sequelae is 30% among symptomatic patients. There were no reported local JEV human cases between 2006 to 2010 in Hong Kong, but it was followed by a resurgence of cases from 2011 to 2017. The mechanism behind this "skip-and-resurgence" patterns is unclear. This work aims to reveal the mechanism behind the "skip-and-resurgence" patterns using mathematical modelling and likelihood-based inference techniques...
May 21, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29792722/-laparoscopic-versus-open-left-pancreatectomy-surgical-stress-response-comparison-in-the-porcine-model
#8
R Pohnán, M Ryska, J Kalvach, L Hána, T Henlín, J Pejchal
INTRODUCTION: Although several techniques of laparoscopic left pancreatectomy have already been developed through experiments on animals and human patients, there is still insufficient information about their pathophysiological mechanisms, especially the impact on surgical stress. METHOD: In a group of 10 pigs, open left pancreatectomy was performed, and the other group of 10 pigs underwent laparoscopic left pancreatectomy. Postoperative stress was compared by determining serum levels of leukocytes, interleukin 1, 6 and CRP from peripheral venous blood collection...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29792720/-experimental-processing-of-corrosion-casts-of-large-animal-organs
#9
R Pálek, V Liška, L Eberlová, H Mírka, M Svoboda, S Haviar, M Emingr, O Brzoň, P Mik, V Třeška
INTRODUCTION: Corrosion casts (CCs) are used for the visualization and assessment of hollow structures. CCs with filled capillaries enable (with the help of imaging methods) to obtain data for mathematical organ perfusion modelling. As the processing is more difficult in case of organs with greater volume of the vasculature, mainly organs from small animals have been cast up to now. The aim of this study was to optimize the protocol of corrosion casting of different organs of pig. Porcine organs are relatively easily accessible and frequently used in experimental medicine...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29792719/-sinusoidal-obstruction-syndrome-induced-by-monocrotaline-in-a-large-animal-experiment-a-pilot-study
#10
R Pálek, V Liška, V Třeška, J Rosendorf, M Emingr, V Tégl, A Králíčková, K Bajcurová, M Jiřík, Z Tonar
INTRODUCTION: Sinusoidal obstruction syndrome (SOS) is a disease which is caused by toxic injury to hepatic sinusoids. This syndrome is most frequently caused by myeloablative radiochemotherapy in patients before hematopoietic stem cells transplantation and also by oxaliplatin mainly in patients with colorectal liver metastases. The aim of this study was to establish a large animal model of SOS, which would enable further study of this disease and facilitate translation of experimental outcomes into human medicine...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29792717/postoperative-monitoring-of-colorectal-anastomosis-experimental-study
#11
J Kalvach, O Ryska, J Pazin, J Hadac, S Juhas, J Juhásová, J Martínek, M Ryska
INTRODUCTION: Inadequate blood supply is one of the major risk factors for colorectal anastomotic leak. Early postoperative detection of local ischemic changes can predict complicated healing and lead to better outcome. Microdialysis (MD) offers real-time evaluation of adequate bowel perfusion through monitoring of tissue metabolism. The aim of this study was to assess the feasibility of MD for early detection of ischemic changes in colorectal anastomosis. METHOD: Five pigs with end-to-end colorectal anastomosis were included...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29792716/options-to-improve-the-quality-of-kidney-grafts-from-expanded-criteria-donors-experimental-study
#12
J Molacek, V Opatrný, V Treska, R Matejka, O Hes
INTRODUCTION: There is a worldwide discrepancy between the number of donors and the number of organs needed for transplantation, leading to certain expansion of criteria, resulting in acceptance of donor organs. This means that organs with worse parenchymal qualities may be harvested for transplantation. One possibility, how to ameliorate the quality of these organs, is to change the concept of their preservation during cold ischemia or even after sudden circulatory arrest, prior to the collection of the organ itself...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29792306/predicting-the-viscosity-of-digesta-from-the-physical-characteristics-of-particle-suspensions-using-existing-rheological-models
#13
Allan K Hardacre, Roger G Lentle, Sia-Yen Yap, John A Monro
The measurement of the viscosity of digesta is complicated by settling and compositional changes that accompany digestion. The current work determined whether the apparent and relative viscosities ( η a and η r ) of digesta could be accurately determined from the actual and maximum solid volume fractions ( ϕ and ϕ max , respectively) using the Maron-Pierce equation. The rheological properties of digesta from the small intestine of six pigs were determined at a shear rate of 1 s-1 at 37°C. A series of suspensions of plant fibre in a Newtonian liquid (70% aqueous fructose) were made at viscosities similar to pig digesta by adjusting ϕ The relationships between the apparent and relative viscosities ( η a and η r ) and the plant fibre properties; aspect ratio (AR) and ϕ and ϕ max were then determined for digesta and the suspensions...
May 2018: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29791513/vaccine-induced-antibodies-to-herpes-simplex-virus-glycoprotein-d-epitopes-involved-in-virus-entry-and-cell-to-cell-spread-correlate-with-protection-against-genital-disease-in-guinea-pigs
#14
Lauren M Hook, Tina M Cairns, Sita Awasthi, Benjamin D Brooks, Noah T Ditto, Roselyn J Eisenberg, Gary H Cohen, Harvey M Friedman
Herpes simplex virus type 2 (HSV-2) glycoprotein D (gD2) subunit antigen is included in many preclinical candidate vaccines. The rationale for including gD2 is to produce antibodies that block crucial gD2 epitopes involved in virus entry and cell-to-cell spread. HSV-2 gD2 was the only antigen in the Herpevac Trial for Women that protected against HSV-1 genital infection but not HSV-2. In that trial, a correlation was detected between gD2 ELISA titers and protection against HSV-1, supporting the importance of antibodies...
May 23, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29791292/sepsis-caused-by-streptococcus-suis-serotype-2-in-a-eurasian-river-otter-lutra-lutra-in-the-republic-of-korea
#15
Yeonsu Oh, Dongseob Tark, Sung-Hyun Moon, Jae-Ik Han, Won-Il Kim, Ho-Seong Cho
An adult male Eurasian river otter ( Lutra lutra) was diagnosed with systemic infection. Microbiologic findings identified Streptococcus suis serotype 2, clonal complex 28, and sequence type 629. Genetic analysis strongly suggested the transmission of S. suis isolate from pigs to wild animals through environmental contamination.
May 23, 2018: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/29790964/evidence-of-evolutionary-history-and-selective-sweeps-in-the-genome-of-meishan-pig-reveals-its-genetic-and-phenotypic-characterization
#16
Pengju Zhao, Ying Yu, Wen Feng, Heng Du, Jian Yu, Huimin Kang, Xianrui Zheng, Zhiquan Wang, George E Liu, Catherine W Ernst, Xueqin Ran, Jiafu Wang, Jian-Feng Liu
Background: Meishan is a pig breed indigenous to China and famous for its high fecundity. The traits of Meishan are strongly associated with its distinct evolutionary history and domestication. However, the genomic evidence linking the domestication of Meishan pigs with the unique features are still poorly understood. The goal of this study is to investigate the genomic signatures and evolutionary evidence related to phenotypic traits of Meishan by large-scale sequencing. Results: We found the unique domestication of Meishan pigs happened at the Taihu Basin area between the Majiabang and the Liangzhu culture, during which 300 protein-coding genes have undergone positive selection...
May 22, 2018: GigaScience
https://www.readbyqxmd.com/read/29790952/why-when-and-how-should-exposure-be-considered-at-the-within-host-scale-a-modelling-contribution-to-prrsv-infection
#17
Natacha Go, Catherine Belloc, Caroline Bidot, Suzanne Touzeau
Understanding the impact of pathogen exposure on the within-host dynamics and its outcome in terms of infectiousness is a key issue to better understand and control the infection spread. Most experimental and modelling studies tackling this issue looked at the impact of the exposure dose on the infection probability and pathogen load, very few on the within-host immune response. Our aim was to explore the impact on the within-host response not only of the exposure dose, but also of its duration and peak, for contrasted virulence levels...
May 21, 2018: Mathematical Medicine and Biology: a Journal of the IMA
https://www.readbyqxmd.com/read/29790662/pathogenic-characterization-of-porcine-reproductive-and-respiratory-syndrome-virus-of-indian-origin-in-experimentally-infected-piglets
#18
D Senthilkumar, K Rajukumar, A Sen, M Kumar, D Shrivastava, S Kalaiyarasu, S Gautam, F Singh, D D Kulkarni, V P Singh
Porcine reproductive and respiratory syndrome (PRRS) is an economically important transboundary viral disease of pigs confronting the swine industry worldwide. This study was aimed to assess the pathogenic potential of PRRS virus belonging to genotype 2 that emerged in India in 2013. Nine 6-week-old piglets were inoculated intranasally with 2 × 105.75  TCID50 /ml of PRRSV (Ind-297221/2013). Three piglets were kept as uninfected controls. Blood and nasal swabs were collected daily up to 7 days post-infection (dpi) and on alternate days subsequently...
May 23, 2018: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29790401/translational-gaps-in-animal-models-of-human-infusion-reactions-to-nanomedicines
#19
S Moein Moghimi, Dmitri Simberg
Adverse infusion reactions to regulatory approved nanomedicines in human subjects are idiosyncratic, but outwardly reproducible in pigs. A large body of evidence suggests that the porcine reactions are related to robust nanoparticle clearance by pulmonary intravascular macrophages (PIMs), and rapid release of arachidonate metabolites from these cells. Similar to pigs, other animals that have resident PIMs in their lungs also respond to intravenously injected particles, where rapid particle clearance by PIMs correlate with peak periods of cardiopulmonary distress...
May 2018: Nanomedicine
https://www.readbyqxmd.com/read/29790058/the-synergistic-effect-of-organic-acids-phytochemicals-and-a-permeabilizing-complex-reduces-salmonella-typhimurium-1-4-5-12-i-shedding-in-pigs
#20
Ruggeri Jessica, Foresti Fabio, Pavesi Roberta, Terrini Alessia, Giudici Francesca, Padoan Diego, Corradi Attilio, Ossiprandi Maria Cristina, Pasquali Paolo, Alborali Giovanni Loris
Salmonella Typhimurium (including S.Typhimurium 1,4,[5],12:i-) and other enteric pathogens cause acute infection in pigs during the weaning stage, often evolving into chronic infections responsible for the introduction of zoonotic bacteria into the slaughterhouse and thus determining carcass contamination. In addition to being zoonotic hazards, these pathogens are responsible for economic losses in affected farms. Traditionally, antibiotic treatments have been largely administered in order to reduce the infection burden but it favored, as a direct consequence, an increase in the number of multi-drug resistance strains...
May 22, 2018: Veterinary Research Communications
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