4,271 results match your criteria Acta Virologica[Journal]


Identification of Cucumber mosaic virus from Arisaema heterophyllum Blume in China.

Acta Virol 2021 ;65(1):97-100

Arisaema heterophyllum Blume is a valuable medicinal plant in the Araceae family. The dried tuber of A. heterophyllum is used in the traditional Chinese medicine, Rhizoma Arisaematis, which is used to treat convulsions, inflammation and cancer. Read More

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Multilocus sequence analysis of Candidatus Phytoplasma aurantifolia associated with phyllody disease of gerbera from India.

Acta Virol 2021 ;65(1):89-96

Gerbera is the most popular cut flower known for its variety of colors and is grown across the world. Its production is challenged by numerous diseases affecting production and quality. During our survey, ten samples from the gerbera plants exhibiting phyllody disease symptoms were collected from Bangalore Rural District, Karnataka, India. Read More

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Optimization of a cellular HBV infection model for use in high-throughput drug screening.

Acta Virol 2021 ;65(1):82-88

Hepatitis B virus (HBV) is a partially double-stranded DNA virus that specifically targets hepatocytes. It is considered a major health issue due to its high prevalence and the life-threatening consequences of chronic infection, including liver cirrhosis and hepatocellular carcinoma. Despite widespread vaccination against HBV, millions of people live with chronic HBV infection. Read More

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Cytokines and chemokines levels in primary HPV infection: a pilot study.

Acta Virol 2021 ;65(1):75-81

The purpose of the study was to compare cytokines (CK) and chemokines concentrations in blood and cervico-vaginal samples between human papillomavirus (HPV)-positive and HPV-negative women, who had no previous history of HPV infection. A case-control study compares the activity and the concentration of CK/chemokines between 19 HPV-positive and 22 HPV-negative women matched by age. Plasma and cervico-vaginal levels of CK and chemokines were measured using cytofluorimetric analysis and expressed as mean of percentages. Read More

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A novel tepovirus, Agave virus T, identified by the analysis of the transcriptome data of blue agave (Agave tequilana).

Acta Virol 2021 ;65(1):68-71

The genome sequence of a novel RNA virus was identified by analyzing transcriptome data obtained from the stem sample of a blue agave (Agave tequilana) plant. Sequence comparison and phylogenetic analysis showed that the RNA virus, Agave virus T (AgVT), was a new member of the genus Tepovirus in the family Betaflexiviridae. AgVT genome had three open reading frames: a 1605-amino acid (aa) replicase (REP), 355-aa movement protein (MP), and 220-aa coat protein (CP). Read More

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In vitro and in vivo antiviral activity of a fluoronucleoside analog, NCC, against Coxsackie virus B3.

Acta Virol 2021 ;65(1):58-67

Coxsackie virus B3 (CVB3) is believed to be a major cause of viral myocarditis, with virus-induced apoptosis playing an important role in pathogenesis. The purpose of this study was to characterize the antiviral activity of a novel fluoronucleoside analogue, N-cyclopropyl-4'-azido-2'-deoxy-2'-fluoro-β-D-cytidine (NCC), against CVB3 in vitro and in vivo, and to establish whether NCC inhibits apoptosis in infected cells. In this study, HeLa cells infected with CVB3 were treated with NCC. Read More

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Differential in vitro effect of endogenous and exogenous nitric oxide on replication of the persistent respiratory syncytial virus genome.

Acta Virol 2021 ;65(1):49-57

Synthesis of nitric oxide (NO) is induced as an early response to viral challenges. Here, we studied effects of endogenous and exogenous NO on respiratory syncytial virus (RSV) genome replication, using a persistently RSV infected macrophage-like cell line. NO was evaluated indirectly by nitrites accumulation and it was increased in infected macrophages with respect to non-infected cells. Read More

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Use of nucleic acids amplification methods in Marek's disease diagnosis and pathogenesis studies.

Acta Virol 2021 ;65(1):27-32

Marek's disease (MD) is a lymphoproliferative disease of chickens with strong economic impact on poultry industry. Although successful vaccination has enabled control of the disease, outbreaks occur in commercial flocks, resulting in substantial economic losses. Together with vaccination, accurate and fast diagnosis of MD remain the most important tools for its efficient control. Read More

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Variability of nonpathogenic influenza virus H5N3 under immune pressure.

Acta Virol 2020 ;64(4):480-489

Mutations arising in influenza viruses that have undergone immune pressure may promote a successful spread of mutants in nature. In order to evaluate the variability of nonpathogenic influenza virus A/duck/Moscow/4182-C/2010(H5N3) and to determine the common epitopes between it and highly pathogenic H5N1 avian influenza viruses (HPAIV), a set of escape mutants was selected due to action of MABs specific against A/chicken/Pennsylvania/8125/83(H5N2), A/Vietnam/1203/04(H5N1) and A/duck/Novosibirsk/56/05(H5N1) viruses. The complete genomes of escape mutants were sequenced and amino acid point mutations were determined in HA, NA, PA, PB1, PB2, M1, M2, and NP proteins. Read More

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February 2021

A simple and efficient method of generating HCMV pp65-specific T cells using overlapping peptides.

Acta Virol 2020 ;64(4):470-479

The methods for expansion of human cytomegalovirus (HCMV)-specific T lymphocytes are limited due to the complex culture process, long culture duration, and human leukocyte antigen (HLA) restriction. Here, we report that in vitro stimulation with pp65 kDa phosphoprotein (pp65)-derived overlapping synthetic peptides rapidly generates large numbers of HCMV-specific cytotoxic T lymphocytes from peripheral blood mononuclear cells (PBMCs) regardless of HLA type. Treatment of PBMCs from healthy volunteers expressing HLA-A*02:01 or HLA-A*24:02 with 138 pp65 overlapping peptides (OLP) resulted in an expansion of HCMV pp65 NLVPMVATV (NLV) pentamer-specific CD8+ T lymphocytes that expressed interferon (IFN)-γ, but the pp65 NLV peptide did not generate HCMV-specific CD8+ T lymphocytes in PBMCs obtained from an HLA-A*24:02 donor due to HLA restriction. Read More

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February 2021

Comparative trachea transcriptome analysis between avian infectious bronchitis virus and avian pathogenic E. coli individual infection and co-infection in SPF chickens.

Acta Virol 2020 ;64(4):457-469

Avian infectious bronchitis virus (IBV) and avian pathogenic Escherichia coli (APEC) are two important respiratory pathogens in the chicken. The co-infection can lead to chronic complications and considerable economic losses in the poultry industry worldwide. In the present study, we compared differential transcriptional profiles in the trachea tissue of three infected groups (IBV, APEC, and co-infection) with the control group to investigate transcriptome profile changes at the early stage of the infection. Read More

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February 2021

IFN-γ mRNA expression is lower in Holstein cows infected with bovine leukemia virus with high proviral load and persistent lymphocytosis.

Acta Virol 2020 ;64(4):451-456

Bovine leukemia virus (BLV) is a retrovirus that affects primarily milky cows. Animals serologically positive to BLV show a Th1 cytokine profile with a predominance of interferon gamma (IFN-γ). IFN-γ has antiviral activity through mechanisms such as resistance to infection, inhibition of viral replication and apoptosis. Read More

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February 2021

Universal anti-influenza vaccines based on viral HA2 and M2e antigens.

Acta Virol 2020 ;64(4):417-426

Aquatic birds are the main reservoir of influenza A viruses (IAVs). These viruses can infect humans repeatedly and cause acute respiratory disease with potential of spread in the form of epidemics. In addition, avian influenza viruses that overcome the interspecies barrier and adapt to humans can cause a world-wide pandemic with severe consequences to human health. Read More

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December 2020

Genetic diversity and biological characterization of watermelon mosaic virus isolates from Iran and Iraq.

Acta Virol 2020 ;64(4):506-508

No abstract Keywords: genetic diversity; Iran and Iraq; water melon; mosaic virus; cucurbits. Read More

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February 2021

Molecular characteristics of a canine distemper virus isolated from mink (Neovison vison) in Shandong, China, 2013.

Acta Virol 2020 ;64(4):501-505

No abstract Keywords: canine distemper virus; H gene; phylogenetic analysis; amino-acid substitution; N-linked glycolysation; cysteine. Read More

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February 2021

Two novel closteroviruses, fig virus A and fig virus B, identified by the analysis of the high-throughput RNA-sequencing data of fig (Ficus carica) latex.

Acta Virol 2021 ;65(1):42-48

Closteroviruses (the genus Closterovirus, the family Closteroviridae) are RNA viruses that infect and cause viral diseases in many economically important plants. Genome sequences of two novel closteroviruses named fig virus A (FiVA) and fig virus B (FiVB) were identified in high-throughput sequencing data obtained from a fig latex sample. FiVA and FiVB genomes, whose lengths are 19,333 bp and 18,741 bp, respectively, were predicted to have 14 shared open reading frames, nine of which had homologs in other closteroviruses. Read More

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Neuropathogenic and non-neuropathogenic EHV-1 strains induce the accumulation of hyperphosphorylated Tau in primary murine neurons.

Acta Virol 2020 ;64(4):490-495

Equid herpesvirus 1 (EHV-1) causes respiratory disease, abortion and neurological disorders in horses. Similarly, to other alphaherpesviruses, EHV-1 is neurotropic and establishes latency in the neurons of its natural host. Despite the fact that many studies have been devoted to the pathogenesis of various clinical forms of EHV-1 infection, mechanisms of the neuronal damage are still not fully understood. Read More

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February 2021

Implication of heat shock proteins in rotavirus entry into Reh cells.

Acta Virol 2020 ;64(4):433-450

The mechanisms of rotavirus entry into the target cell are described as a multi-step event in which the virions are bound to sialic acid (SA), followed by interaction with heat shock cognate protein 70 (Hsc70), some integrins and protein disulfide isomerase (PDI). However, the cell surface receptor molecules facilitating the entry of tumor cell-adapted rotavirus are not completely characterized. Using infection blocking assays with antibodies to some heat shock proteins (HSPs) and also some inhibitors of these cellular proteins, we were able to identify the cell surface Hsp90, Hsp70, Hsc70, Hsp60, Hsp40, PDI and integrin β3 as receptors of tumor cell-adapted rotavirus in Reh cells. Read More

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February 2021

Complete genome sequence and genetic organization of a Garlic virus D infecting garlic (Allium sativum) from northern India.

Acta Virol 2020 ;64(4):427-432

The present paper describes first full genome sequence of the Garlic virus D (GarV-D) from northern India with a genome size of 8425 bp long ssRNA. The infected leaves and bulbs of garlic variety Yamuna Safed (G-282) plants suspected for GarV-D infection were collected with the aim to identify contagion virus during March, 2018. The total RNA was extracted from the pooled garlic plants using TRIzol reagent and sequenced using an Illumina HiSeq 2000 platform. Read More

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February 2021

Herpesvirus diseases of domestic animals and game species in the Slovak Republic.

Acta Virol 2020 ;64(4):409-416

Herpesviruses are DNA viruses that cause serious latent infections in humans and animals. These pathogens significantly influence the animal health and economy of animal husbandry. The reduction of production parameters, abortions, birth of weak individuals and by costs associated with the elimination and monitoring of herpesvirus diseases are among the most serious harms caused by herpesviruses. Read More

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February 2021

Literature review on virus and host response proteins in COVID-19: pathobiology, management, diagnosis and treatment.

Acta Virol 2021 ;65(1):10-26

Coronavirus disease 2019 (COVID-19) is a severe acute respiratory syndrome caused by a novel strain of coronavirus (SARS-CoV-2) which was declared by WHO as a cause of global pandemic. By human-to-human transmission it caused severe damage to mankind with increased mortality rate worldwide. Coronavirus is a spherical enveloped virus with single stranded positive-sense RNA with a size of ~30 kilobases encoding various structural, non-structural and accessory proteins. Read More

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Mechanisms and potential therapeutic targets of hyperinflammatory responses in SARS-CoV-2.

Acta Virol 2021 ;65(1):3-9

Coronavirus infection is now the leading cause of death globally. Despite the several bedsides- to- bench investigations carried out by researchers all over the world to identify the best prophylactic and therapeutic options for this deadly virus, no novel vaccine or treatment drug has been developed. Accumulating evidence suggests that severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is associated with hyper inflammation characterized by excessive release of pro-inflammatory cytokines known as a cytokine storm. Read More

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Isolation, identification and chemical inactivation of infectious laryngotracheitis virus for use as a vaccine candidate.

Acta Virol 2021 ;65(1):33-41

Infectious laryngotracheitis (ILT) is a poultry respiratory disease associated with considerable mortality in chicken and decreasing egg production. Vaccination along with biosecurity measures are considered as the main strategy for ILT control. This study was aimed to evaluate the potency of an inactive ILT vaccine candidate derived from a local ILTV isolate. Read More

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Pathological and immunological protection induced by inactivated reverse genetics-based H3N8 equine influenza vaccine candidate in murine model.

Acta Virol 2020 ;64(3):359-374

Equine influenza (EI) is an important viral respiratory disease of equines caused by influenza A virus (IAV). The antigenic drift in IAVs necessitates regular updating and harmonization of vaccine strain with the circulating virus. The reverse genetics-based recombinant viruses could be easy instrument in generating vaccine against circulating virus in a quick and effective manner. Read More

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January 2021

In the peripheral blood mononuclear cells (PBMCs) of HCV infected patients the expression of STAT1 and IRF-1 is downregulated while that of caspase-3 upregulated.

Acta Virol 2020 ;64(3):352-358

Several peripheral blood mononuclear cell (PBMC) defects have been linked with hepatitis C virus (HCV) infection, including alterations in cytokine secretion and increased cell death. This study was performed to investigate the expression levels of signal transducer and activator of transcription 1 (STAT1), interferon regulatory factor 1 (IRF-1), and caspase 3 in PBMCs of patients infected with HCV. STAT1, IRF-1, and caspase 3 expression levels were compared in PBMCs from 19 untreated (naïve) HCV+ patients, 8 treated (sustained responder [SR]) HCV patients, and 20 HCV- healthy controls. Read More

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January 2021

A new single nucleopolyhedrovirus isolate from Cabbage looper, Trichoplusia ni (Hubner) (Lepidoptera: Noctuidae): Detection, characterization and virulence.

Acta Virol 2020 ;64(3):344-351

This study was focused on the detection, characterization and virulence of a new baculovirus isolate from the larvae of cabbage looper, Trichoplusia ni (Hubner) (Lepidoptera: Noctuidae). T. ni is a polyphagous pest, and it has cosmopolitan distribution. Read More

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January 2021

Elevated circulating miR-494 in plasma of children with enterovirus 71 induced hand, foot, and mouth disease and its potential diagnostic value.

Authors:
J Liu X-C Lu W-D Zhou

Acta Virol 2020 ;64(3):338-343

Hand, foot, and mouth disease (HFMD) is a common pediatric disease, whose outcome depends of the enterovirus genotype infecting the patient. The present study is focused on the potential diagnostic value and the role of circulating microRNA-494 (miR-494) in enterovirus 71-induced more severe form of HFMD. We included 102 children with enterovirus 71 (EV71)-induced HFMD, 42 coxsackievirus A16 (CA16)-induced HFMD and 102 healthy controls. Read More

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January 2021

Potential therapeutic effects of Resveratrol against SARS-CoV-2.

Acta Virol 2020 ;64(3):276-280

Novel Coronavirus COVID-19 or Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) as well as Severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV), are human pathogens. Current pandemics of SARS-CoV-2 represents a major health problem worldwide, with over four million cases and more than 300,000 deaths in the world. Development of effective therapy thus became an emergency. Read More

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October 2020