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Association of swine influenza H1N1 pandemic virus(SIV-H1N1p) with porcine respiratory disease complex in sows from commercial pig farms in Colombia

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Virologica Sinica 2014年第4期29卷 242-249页

作者： Luisa Fernanda Mancipe Jiménez Gloria Ramírez Nieto victor vera alfonso Jairo Jaime Correa Laboratory of Animal Virology Faculty of Veterinary Medicine and Animal Science National University of Colombia

Porcine respiratory disease complex （PRDC） is a serious health problem that mainly affects growing and finishing pigs. PRDC is caused by a combination of viral and bacterial agents, such as porcine reproductive and respiratory syndrome virus （PRRSV）, swine influenza virus （SIV）, Mycoplasma hyopneumoniae （Myh）, Actinobacillus pleuropneumoniae （APP）, Pasteurella multocida and Porcine circovirus 2 （PCV2）. To characterize the specific role of swine influenza virus in PRDC presentation in Colombia, 11 farms from three major production regions in Colombia were examined in this study. Nasal swabs, bronchial lavage and lung tissue samples were obtained from animals displaying symptoms compatible with SIV. Isolation of SIV was performed in 9-day embryonated chicken eggs or Madin-Darby Canine Kidney （MDCK） cells. Positive isolates, identified via the hemagglutination inhibition test, were further analyzed using PCR. Overall, 7 of the 11 farms were positive for SIV. Notably, sequencing of the gene encoding the hemagglutinin （HA） protein led to grouping of strains into circulating viruses identified during the human outbreak of 2009, classified as pandemic H1N1-2009. Serum samples from 198 gilts and multiparous sows between 2008 and 2009 were obtained to determine antibody presence of APP, Myh, PCV2 and PRRSV in both SIV-H1Nlp-negative and -positive farms, but higher levels were recorded for SIV- HI Nlp-positive farms. Odds ratio （OR） and P values revealed statistically significant differences （p〈0.05） in PRDC presentation in gilts and multiparous sows of farms positive for SIV-HINlp. Our findings indicate that positive farms have increased risk of PRDC presentation, in particular, PCV2, APP and Myh.

关键词： SIV-HIN1 swine influenza pandemic porcine respiratory disease complex Colombia

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First isolation and identification of H1N1 swine influenza viruses in Colombian pig farms

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Health 2012年第10期4卷 983-990页

作者： Gloria Consuelo Ramirez-Nieto Cesar Augusto Diaz Rojas victor Julio vera alfonso Jairo Jaime Correa Jose Dario Mogollon Galvis Línea de Microbiología y Epidemiología Posgrado en Salud Animal Facultad de Medicina Veterinaria y de Zootecnia Universidad Nacional de Colombia Bogotá Colombia

The pig industry in Colombia has grown 30% in the last decade achieving high levels of technology and efficiency;in spite of that, respiratory diseases remain a constraint. Since 1970, serological evidence and histological findings suggested the role of swine influenza virus (SIV) as part of the porcine respiratory disease complex;nevertheless, elusive and molecular typing isolates are missing. This study was aimed at isolating SIV from intensive pig farms and to achieve molecular characterization to determine strains circulating in the field. In order to accomplish this goal, 242 samples were taken from nasal swabs, 25 from bronchial washes and 8 from lung tissue. Samples were collected during a period of three years, between 2008 and 2010 and were originated from 78 farms of the three main pig production regions of the country. The samples were transported in BHI broth with 2% antibiotic and antimycotic solution and stored at –70?C until processed. The swabs were inoculated in 9 - 11 days old embryo chicken eggs and in MDCK (Madin Darby Canine Kidney) cell cultures with the addition of trypsin. The isolates were identified by the HA (hemoagglutination) test and by RT-PCR targeting the HA (hemagglutinin), NA (Neuraminidase) and M (Matrix) genes. Full length sequence of the HA and NA glycoproteins from four selected virus isolates was conducted (Macrogen?. USA). As a result, fifteen SIV isolates from nine farms distributed in the three regions were obtained. Twelve of the isolates are related to the swine origin H1N1 virus that caused the 2009 influenza pandemic. The remaining three viruses were related to classical swine influenza viruses.

关键词： Swine Influenza H1N1 Colombia First Isolation Classical Pandemic

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An Inactivated Vaccine from a Field Strain of Bovine Herpesvirus-1(BoHV-1) has High Antigenic Mass and Induces Strong Efficacy in a Rabbit Model

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Virologica Sinica 2013年第1期28卷 36-42页

作者： Julian Ruiz-Sáenz Jairo Jaime victor vera Microbiology and Epidemiology Group Faculty of Veterinary Medicine and Animal Science National University of Colombia Grupo de Investigación CENTAURO Agrarian Sciences Faculty Universidad de Antioquia A.A. 1226

Bovine Herpesvirus-1 （BoHV-1） is a DNA virus belonging to the family Herpesviridae, subfamily Alfaherpesvirinae; it is a worldwide pathogen, causing serious economic losses in livestock. In Colombia there have been multiple isolates of BoHV-1 that have been subjected to molecular characterization, classifying most of the country isolates as BoHV-I.1. In the present study we developed and evaluated an ethyleneimine binary inactivated isolate from the native BoHV-1 strain （C6rdoba-2） in a rabbit model of vaccination and infection. The vaccine was evaluated in two phases, one of immunogenicity with vaccination and a booster after 21 days, and an evaluation phase of protection against challenge with a highly virulent reference strain. The results demonstrate optimum serum-conversion, with protective neutralizing antibody titers 28 days post vaccination and optimal protection against challenge with the reference strain with decreased clinical signs of infection, protection against the onset of fever and decrease of virus excretion post challenge. In conclusion, our results show the enormous potential that an immunogenic inactivated vaccine has produced from the native BoHV-I.1 strain, which produces a high antigen mass to the vaccine to induce optimal immunity and protection, and it is a strong candidate for evaluation and possible future use in different cattle populations.

关键词： Antigenic Mass Adjuvant Binary Ethyleneimine Bovine Herpesvirus-1 Vaccine

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Molecular and in vitro Characterization of Field Isolates of Bovine Herpesvirus-1

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Virologica Sinica 2012年第1期27卷 26-37页

作者： Julian Ruiz-Saenz Jairo Jaime Gloria Ramirez victor vera Faculty of Veterinary Medicine and Animal Science National University of Colombia

Bovine Herpesvirus-1 (BoHV-1) is distributed worldwide and is a major pathogen in cattle, being the causal agent of a variety of clinical syndromes. The aim of this study was to isolate and to characterize (molecular and biological characterization) BoHV-1 from 29 immunosuppressed animals. It was possible to obtain 18 isolates, each from a different animal, such as from the respiratory and reproductive tracts. In some cases the cytopathic effect was visible 12 hours post-inoculation, and became characteristic after 36-48 hours. Biological characteristics were evaluated and compared with Iowa and Colorado-1 reference strains, and differences were found in plaque size, virus titer measured by TCID50 and PFU/mL, and one step virus curves. These results showed that some isolates had a highly virulent-like behavior in vitro, compared to the reference strains, with shorter eclipse periods, faster release of virus into the supernatants, and higher burst size and viral titer. There were no differences in glycoprotein expression of BoHV-1 isolates, measured by Western blot on monolayers. Moreover, using restriction endonucleases analysis, most of the viruses were confirmed as BoHV-1.1 and just one of them was confirmed as BoHV-1.2a subtype. These findings suggest that some wild-type BoHV-1 isolates could be useful as seeds to develop new monovalent vaccines.

关键词： Bovine herpesvirus 1 Genital infection Respiratory infection Latent infection

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Impact of spiritual beliefs and faith-based interventions on diabetes management

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World Journal of Diabetes 2021年第5期12卷 630-641页

作者： Charity Neejide Onyishi Leonard Chidi Ilechukwu vera victor-Aigbodion Chiedu Eseadi Department of Educational Psychology University of JohannesburgGauteng2006South Africa Department of Educational Foundations University of NigeriaNsukkaEnugu 410001Nigeria Department of Arts Education University of NigeriaNsukkaEnugu 410001Nigeria

Management of diabetes constitutes significant social and economic burdens *** is a shortage of empirical studies on the management of diabetes and the associated mental health issues through spiritual beliefs and faith-based interventions(FBIs).It is not also clear how spiritual beliefs and FBIs account for the effective management of diabetic *** article discusses the impact of spiritual beliefs and FBIs in the management of diabetes,from relationship and efficacy studies that report outcomes from experimental procedures of related *** majority of the relationship studies showed positive relationships,while efficacy studies showed a high efficacy of interventions in faith-based ***,none of the studies clearly reported the mechanisms of change or modality of operation in a FBI that can serve as a model across culture and *** mechanisms of change were discussed for further development of a standard faith-based model,and finally,suggestions for future research were also highlighted by the authors.

关键词： Comorbid health conditions Diabetes Faith-based interventions Diabetes management Spirituality Coping strategies

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The transition from backarc extension to Andean growth:Insights from geochronologic,sedimentologic,and structural studies of Mesozoic and Cenozoic sedimentary and volcanic rocks in south-central Chile(36°S)

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Geoscience Frontiers 2024年第5期15卷 93-117页

作者： alfonso Encinas Nicolás Henríquez Daniel Castro Darío Orts Diego Kietzmann Franco Iovino Paulo Vásquez Andrés Folguera victor Valencia Facundo Fuentes Departamento de Ciencias de la Tierra Facultad de Ciencias QuímicasUniversidad de ConcepciónVíctor Lamas 1290Concepción 4030000Chile Universidad Nacional de Río Negro.Instituto de Investigación en Paleobiología y Geología.General Roca Río NegroArgentina Instituto de Investigación en Paleobiología y Geología(IIPG).CONICET.Av.J.A.Roca 1242 8332 General RocaRío NegroArgentina Universidad de Buenos Aires Facultad de Ciencias Exactas y NaturalesDepartamento de Ciencias GeológicasCiudad UniversitariaPabellón ⅡIntendente Güiraldes 2160C1428EHA Ciudad Autónoma de Buenos AiresArgentina CONICET-Universidad de Buenos Aires Instituto de Geociencias BásicasAmbientales y Aplicadas de Buenos Aires(IGeBA)Ciudad UniversitariaPabellón ⅡIntendente Güiraldes 2160C1428EHA Ciudad Autónoma de Buenos AiresArgentina Instituto de Estudios Andinos“Don Pablo Groeber”(IDEAN) CONICET-Universidad de Buenos AiresBuenos AiresArgentina Facultad de Ciencias Exactas y Naturales Universidad de Buenos AiresBuenos AiresArgentina Washington State University School of the EnvironmentPullmanUSA Yacimientos Petrolíferos Fiscales(YPF)S.A. Buenos AiresArgentina

Many studies propose a significant shift in the tectonic and paleogeographic evolution of the Andes in south-central Chile and Argentina during the Late *** has been proposed that the preceding Jurassic-Early Cretaceous extensional regime that resulted in a low-relief volcanic arc and the backarc Neuquén basin came to an end,giving way to shortening and Andean growth from the Late Cretaceous ***,there are disagreements regarding the timing and nature of this transition to Andean *** address these issues,we conducted geochronologic(U-Pb and^(40)Ar/&(39)Ar),sedimentologic,and structural studies on Mesozoic-Cenozoic sedimentary and volcanic rocks in the Río Maule area(Principal Cordillera,Chile,36°S).From our findings and prior analyses,we propose the following tectono-stratigraphic evolution of the region.(1)Marine deposition of the Tithonian-Hauterivian Baños del Flaco Formation took place in an extensional backarc basin.(2)After a~40 Myr hiatus,fluvial deposits of the Colimapu Formation and volcanic rocks of the Plan de los Yeuques Formation accumulated during the *** the Colimapu Formation displays evidence of syndepositional shortening,the Plan de los Yeuques Formation exhibits synextensional growth *** to other studies,our results suggest that the Chilean part of the Principal Cordillera was largely a zone of active deposition rather than an elevated fold-thrust belt during the Late *** propose that sedimentation occurred within a series of relatively stable intermontane subbasins generated by shortening,followed by extension.(3)After a~20 Myr hiatus,middle Eocene to early Miocene(Lutetian-Aquitanian)accumulation of a thick succession of andesitic lavas and minor clastic sediments of the Abanico Formation occurred in an intraarc extensional basin.(4)Finally,major shortening and uplift of previously deposited Mesozoic-Cenozoic rocks took place throughout the *** phase constitu

关键词： Andes South-central Chile Backarc basin Foreland basin Fold-thrust belt

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Pre-fire aboveground biomass, estimated from LiDAR, spectral and field inventory data, as a major driver of burn severity in maritime pine (Pinus pinaster) ecosystems

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Forest Ecosystems 2022年第2期9卷 234-246页

作者： Jose Manuel Fernandez-Guisuraga Susana Suarez-Seoane Paulo MFernandes victor Fernandez-Garcia alfonso Fernandez-Manso Carmen Quintano Leonor Calvo Area of Ecology Department of Biodiversity and Environmental ManagementFaculty of Biological and Environmental SciencesUniversity of Leon24071LeonSpain Centro de Investigacao e de Tecnologias Agroambientais e Biologicas Universidade de Tras-os-Montes e Alto Douro5000-801Vila RealPortugal Department of Organisms and Systems Biology(Ecology Unit)and Research Unit of Biodiversity(IMIB UO-CSIC-PA)University of OviedoOviedoMieresSpain Agrarian Science and Engineering Department School of Agricultural and Forestry EngineeringUniversity of Leon24400PonferradaSpain Electronic Technology Department School of Industrial EngineeringUniversity of Valladolid47011ValladolidSpain Sustainable Forest Management Research Institute University of Valladolid-Spanish National Institute for Agriculture and Food Research and Technology(INIA)34004PalenciaSpain

Background:The characterization of surface and canopy fuel loadings in fire-prone pine ecosystems is critical for understanding fire behavior and anticipating the most harmful ecological effects of ***,the joint consideration of both overstory and understory strata in burn severity assessments is often *** aim of this work was to assess the role of total,overstory and understory pre-fire aboveground biomass(AGB),estimated by means of airborne Light Detection and Ranging(LiDAR)and Landsat data,as drivers of burn severity in a megafire occurred in a pine ecosystem dominated by Pinus pinaster *** the western Mediterranean ***:Total and overstory AGB were more accurately estimated(R^(2) equal to 0.72 and 0.68,respectively)from LiDAR and spectral data than understory AGB(R^(2)=0.26).Density and height percentile LiDAR metrics for several strata were found to be important predictors of *** severity responded markedly and non-linearly to total(R^(2)=0.60)and overstory(R ^(2)=0.53)AGB,whereas the relationship with understory AGB was weaker(R ^(2)=0.21).Nevertheless,the overstory plus understory AGB contribution led to the highest ability to predict burn severity(RMSE=122.46 in dNBR scale),instead of the joint consideration as total AGB(RMSE=158.41).Conclusions:This study novelty evaluated the potential of pre-fire AGB,as a vegetation biophysical property derived from LiDAR,spectral and field plot inventory data,for predicting burn severity,separating the contri-bution of the fuel loads in the understory and overstory strata in Pinus pinaster *** evidenced relationships between burn severity and pre-fire AGB distribution in Pinus pinaster stands would allow the implementation of threshold criteria to support decision making in fuel treatments designed to minimize crown fire hazard.

关键词： Aboveground biomass Burn severity Landsat LiDAR Pinus pinaster

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The mechanism of dysbiosis in alcoholic liver disease leading to liver cancer

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Hepatoma Research 2020年第2期6卷 20-32页

作者： Nahum Méndez-Sánchez Alejandro Valencia-Rodríguez alfonso vera-Barajas Ludovico Abenavoli Emidio Scarpellini Guadalupe Ponciano-Rodríguez David Q.-H.Wang Liver Research Unit Medica Sur Clinic&FoundationMexico City 14050Mexico Faculty of Medicine National Autonomous University of MexicoMexico City 04510Mexico Department of Health Sciences University“Magna Graecia”Viale EuropaCatanzaro 88100Italy Clinical Nutrition Unit and Internal Medicine Unit“Madonna del Soccorso”General HospitalVia Luciano Manara 7San Benedetto del Tronto(AP)63074Italy Public Health Department Faculty of MedicineNational Autonomous University of MexicoMexico City 04510Mexico Department of Medicine and Genetics Division of Gastroenterology and Liver DiseasesMarion Bessin Liver Research CenterEinstein-Mount Sinai Diabetes Research CenterAlbert Einstein College of MedicineBronxNY 10461USA

Currently, alcoholic liver disease (ALD) is one of the most prevalent chronic liver diseases worldwide, representing one of the main etiologies of cirrhosis and hepatocellular carcinoma (HCC). Although we do not know the exact mechanisms by which only a selected group of patients with ALD progress to the final stage of HCC, the role of the gut microbiota within the progression to HCC has been intensively studied in recent years. To date, we know that alcohol-induced gut dysbiosis is an important feature of ALD with important repercussions on the severity of this disease. In essence, an increased metabolism of ethanol in the gut induced by an excessive alcohol consumption promotes gut dysfunction and bacterial overgrowth, setting a leaky gut. This causes the translocation of bacteria, endotoxins, and ethanol metabolites across the enterohepatic circulation reaching the liver, where the recognition of the pathogen-associated molecular patterns via specific Toll-like receptors of liver cells will induce the activation of the nuclear factor kappa-B pathway, which releases pro-inflammatory cytokines and chemokines. In addition, the mitogenic activity of hepatocytes will be promoted and cellular apoptosis will be inhibited, resulting in the development of HCC. In this context, it is not surprising that microbiota-regulating drugs have proven effectiveness in prolonging the overall survival of patients with HCC, making attractive the implementation of these drugs as co-adjuvant for HCC treatment.

关键词： Alcoholic liver disease gut microbiota dysbiosis hepatocellular carcinoma

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Impact of liver enzymes on SARS-CoV-2 infection and the severity of clinical course of COVID-19

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Liver Research 2021年第1期5卷 21-27页

作者： Fátima Higuera-de la Tijera Alfredo Servín-Caamaño Daniel Reyes-Herrera Argelia Flores-López Enrique J.A.Robiou-Vivero Felipe Martínez-Rivera victor Galindo-Hernández Oscar Chapa-Azuela alfonso Chávez-Morales victor H.Rosales-Salyano Multidisciplinary Team for the Attention and Care of Patients with COVID-19 Hospital General de México Dr.Eduardo LiceagaMexico CityMexico Gastroenterology and Hepatology Department Hospital General de México Dr.Eduardo LiceagaMexico CityMexico Internal Medicine Department Hospital General de México Dr.Eduardo LiceagaMexico CityMexico Hepatobiliary and Pancreatology Clinic Surgery DepartmentHospital General de México Dr.Eduardo LiceagaMexico CityMexico Intensive Care Unit Hospital General de México Dr.Eduardo LiceagaMexico CityMexico

Background and aim Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),the virus responsible for the current pandemic,can have multi-organ *** studies show that liver injury could be a manifestation of the disease,and that liver disease could also be related to a worse *** aim was to compare the characteristics of patients with severe coronavirus disease 2019(COVID-19)due to SARS-CoV-2 who required intubation versus stable hospitalized patients to identify the early biochemical predictive factors of a severe course of COVID-19 and subsequent requirement for intubation,specifically in *** This was an observational case-control study nested in a cohort *** medical records of patients admitted for confirmed COVID-19 at a tertiary level center in Mexico City were *** and biochemical data were collected,and the characteristics of patients who required invasive mechanical ventilation(IMV)(cases)were compared with stable hospitalized patients without ventilation(controls).Results We evaluated 166 patients with COVID-19 due to SARS-CoV-2 infection;114(68.7%)were men,the mean age was 50.6±13.3 years,and 27(16.3%)required *** comparative analysis between cases and controls showed(respectively)significantly lower blood oxygen saturation(SpO_(2))(73.5±12.0%vs.83.0±6.8%,P<0.0001)and elevated alanine aminotransferase(ALT)(128(14–1123)IU/L vs.33(8–453)IU/L,P=0.003),aspartate aminotransferase(AST)(214(17–1247)vs.44(12–498)IU/L,P=0.001),lactic dehydrogenase(LDH)(764.6±401.9 IU/L vs.461.0±185.6 IU/L,P=0.001),and D-dimer(3463(524–34,227)ng/mL vs.829(152–41,923)ng/mL,P=0.003)*** in the cases group were older(58.6±12.7 years vs.49.1±12.8 years,P=0.001).Multivariate analysis showed that important factors at admission predicting the requirement for IMV during hospitalization for COVID-19 were AST≥250 IU/L(odds ratio(OR)=64.8,95%confidence interval(CI)7.5–560.3,P<0.0001)and D-dimer≥3500 ng/mL(OR=4.1,95

关键词： Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) Coronavirus disease 2019(COVID-19) Liver enzymes D-dimer Disease severity Invasive mechanical ventilation(IMV) Multi-organ failure

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A new oxidative pathway of nitric oxide production from oximes in plants

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Molecular Plant 2024年第1期17卷 178-198页

作者： Pedro Lopez-Gomez Javier Buezo Marina Urra alfonso Cornejo Raquel Esteban Jorge Fernandez de los Reyes Estibaliz Urarte Estefania Rodriguez-Dobreva Alejandro Chamizo-Ampudia Alejandro Eguaras Sebastian Wolf Daniel Marino victor Martinez-Merino Jose F.Moran Institute for Multidisciplinary Research in Applied Biology(IMAB) Department of SciencesPublic University of Navarre(UPNA)Avda.de Pamplona 12331192 MutilvaSpain Institute for Advanced Materials and Mathematics(INAMAT2) Department of SciencesPublic University of Navarre(UPNA)Campus de Arosadia31006 PamplonaSpain Department of Plant Biology and Ecology University of the Basque Country(UPV/EHU)Sarriena s/nApdo.64448080 BilbaoSpain Center for Plant Molecular Biology(ZMBP) University of TubingenGeschwister-Scholl-Platz72074 TubingenGermany Institute of Natural Resources and Agrobiology of Salamanca(IRNASA) Department of Plant-Microorganism InteractionsSpanish National Research Council(CSIC)Cordel de Merinas40-5237008SalamancaSpain Department of Biochemistry Area of Molecular BiologyVeterinary FacultyUniversity of LeonCampus de Vegazanas/n.24071 LeonSpain

Nitric oxide(NO)is an essential reactive oxygen species and a signal molecule in *** several studies have proposed the occurrence of oxidative NO production,only reductive routes for NO production,such as the nitrate(NO_(3)^(-))-upper-reductase pathway,have been evidenced to date in land ***,plants grown axenically with ammonium as the sole source of nitrogen exhibit contents of nitrite and NO3−,evidencing the existence of a metabolic pathway for oxidative production of *** hypothesized that oximes,such as indole-3-acetaldoxime(IAOx),a precursor to indole-3-acetic acid,are intermediate oxidation products in NO *** detected the production of NO from IAOx and other oximes catalyzed by peroxidase(POD)enzyme using both 4-amino-5-methylamino-2′,7′-difluorescein fluorescence and *** stimulated the reaction,while superoxide dismutase inhibited ***,mouse NO synthase can also use IAOx to produce NO at a lower rate than *** provided a full mechanism for POD-dependent NO production from IAOx consistent with the experimental data and supported by density functional theory *** showed that the addition of IAOx to extracts from Medicago truncatula increased the in vitro production of NO,while in vivo supplementation of IAOx and other oximes increased the number of lateral roots,as shown for NO donors,and a more than 10-fold increase in IAOx dehydratase ***,we found that in vivo supplementation of IAOx increased NO production in Arabidopsis thaliana wild-type plants,while prx33-34 mutant plants,defective in POD33-34,had reduced *** data show that the release of NO by IAOx,as well as its auxinic effect,explain the superroot ***,our study reveals that plants produce NO utilizing diverse molecules such as oximes,POD,and flavins,which are widely distributed in the plant kingdom,thus introducing a long-awaited oxidative pathway to NO production in plants.T

关键词： ammonium oxidation auxin nitric oxide oxime peroxidase root phenotype

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