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Bruna Letícia Domingues Molinari, Alice Fernandes Alfieri, Amauri Alcindo Alfieri
Rotaviruses (RVs), a common cause of viral gastroenteritis in humans and animals, are classified into 9 established groups/species (RVA-RVI). Although RVB has been found in several countries, genetic variation among RVB field strains remains poorly characterized. RVB strains can be classified into G genotypes based on a nucleotide (nt) homology that exceeds a cutoff value of 80% for the gene that encodes the structural protein VP7. In this study, we determined the VP7 nt and deduced amino acid sequences of one RVB strain (RB62) identified in a diarrheic fecal sample obtained from a piglet in Brazil in 2012...
July 16, 2018: Intervirology
Érica Benassi-Zanqueta, Caroline Fernandes Marques, Samara Requena Nocchi, Benedito Prado Dias Filho, Celso Vataru Nakamura, Tania Ueda-Nakamura
BACKGROUND/AIMS: Parthenolide is a sesquiterpene lactone that is present in plants of the Tanacetum genus, for which many biological effects have already been reported, including antiherpetic activity. Although the effectiveness of parthenolide against Herpes simplex virus 1 (HSV-1) has already been demonstrated, such findings are still controversial. The objective of this study was to investigate the ways in which parthenolide exerts anti-HSV-1 activity. METHODS: The cytotoxicity and antiviral activity of parthenolide were determined by the MTT method and plaque reduction assay, respectively...
July 12, 2018: Intervirology
Massimiliano Bergallo, Valentina Daprà, Cristina Calvi, Paola Montanari, Ilaria Galliano, Paolo Ravanini
According to the latest update, 2,578 unique mature micro-RNAs (miRNAs) are currently annotated in the human genome and participate in the regulation of multiple events, such as cellular proliferation or apoptosis. A previous study analyzing global miRNA expression patterns in GH cells (high human endogenous retrovirus, HERV, K vs. low) showed that 2 miRNAs (miR-663 and miR-638) are differentially regulated and exhibit expression parallel to that of HERV-K. The aim of this study was to evaluate HERV-K and -W pol gene and miR-155 expression in kidney transplant recipients and the possible relationship between them...
July 10, 2018: Intervirology
Yongbo Kang, Yue Cai
Group A rotavirus (RVA) is a serious public problem in China, with a prevalence of 29.7% in diarrhea cases under 5 years of age. A total of 1,224 fecal specimens were collected in 2015 from children under 5 years of age with acute gastroenteritis in Kunming, China, for detection and characterization of rotavirus. The prevalence of RVA was 28.5%. The frequency of RVA detection was greatest (52%) among children aged 7-12 months. The following strains were the most common types: G9P(8) (58.2%), G3P(8) (14.9%), and G1P(8) (6...
July 5, 2018: Intervirology
Ayushman Ghosh, Anita Desai, Vasanthapuram Ravi, Gayathri Narayanappa, Brij Kishore Tyagi
AIM: The study was designed to identify putative Chikungunya virus (CHIKV) receptor/s on C6/36 cells that facilitate viral entry. METHODS: The virus overlay protein binding assay (VOPBA) was adopted to identify CHIKV-interacting bands present in C6/36 cell membrane and identity of the protein was established by mass spectrometry. The role of this protein as a putative CHIKV receptor on C6/36 cells was confirmed by infection inhibition assay. Cell surface localization of the identified protein was studied by indirect immunofluorescence assay (IFA) on nonpermeabilized cells and by flow cytometry...
June 28, 2018: Intervirology
Laura Conde-Ferraez, Ramón Pacheco-Arjona, Cinthia Novelo Canul, Jesus Gomez-Carballo, Jorge Humberto Ramirez-Prado, Guadalupe Ayora-Talavera, Maria Del Refugio González-Losa
BACKGROUND/AIMS: The study aimed to describe human papillomavirus (HPV) 58 genetic variability in E6 and E7 oncogenes from women in southeast Mexico and their phylogenetic relationships with the sequences from other geographical regions. METHODS: The E6-E7 region was amplified by nested PCR, and sequenced for identification of polymorphisms, phylogenetic trees construction, and haplotype and fixation tests. RESULTS: HPV58 positive samples were obtained from a repository, 54 were amplified, 47 sequences for the E6 gene, and 51 sequences for the E7 gene were obtained...
June 26, 2018: Intervirology
Amita Jain, Shantanu Prakash, Bhawana Jain
OBJECTIVE: The study was conducted to analyze changes in HA and NA genes of pandemic pH1N1 strains, collected from North Indian tertiary care hospital during 2015 and studied the nucleotide change since 2009. Differences in clinical features of cases positive and negative for influenza viruses were also studied. METHODS: All samples referred for H1N1 testing, were tested for influenza viruses. Randomly selected 25 strains of pH1N1 were studied for nucleotide sequences of HA & NA gene...
June 26, 2018: Intervirology
Antoine Enfissi, Marie-Line Joffret, Déborah Delaune, Francis Delpeyroux, Dominique Rousset, Maël Bessaud
In 2017, numerous cases of acute haemorrhagic conjunctivitis (AHC) were reported in the Caribbean and in South America. Preliminary reports identified adenoviruses and enteroviruses in some patient samples but, until now, none of the etiologic agents have been fully characterized. We report the full-length genomic sequences of 4 coxsackievirus A24 (CV-A24) isolates collected from AHC patients in French Guiana during this outbreak (May and June 2017). These isolates are very closely related and belong to the genotype IV of CV-A24 variant, which consists of strains sampled worldwide during AHC outbreaks in the 2000s and 2010s...
June 13, 2018: Intervirology
Ahmed S Abdel-Moneim, Anupam Varma, Flor H Pujol, George K Lewis, Janusz T Paweska, Jesús L Romalde, Maria Söderlund-Venermo, Matthew D Moore, Michael M Nevels, Vikram N Vakharia, Vinod Joshi, Yashpal Singh Malik, Zhengli Shi, Ziad A Memish
No abstract text is available yet for this article.
June 6, 2018: Intervirology
Hosni A M Hussein, Usama M Abdel-Raouf, Shaw M Akula
OBJECTIVES: Kaposi sarcoma-associated herpesvirus (KSHV) glycoprotein B (gB) is expressed on the viral envelope as well as on the cytoplasmic membrane of infected cells. In the current study, we aimed to decipher the impact of membrane-associated gB on adhesion and migration of cells via modulating the expression of cytokines. METHODS: A combination of polymerase chain reaction array, cell adhesion assay, and wound-healing migration assay was conducted to study the influence of the gB-induced cytokines on cell adhesion and migration...
March 29, 2018: Intervirology
Pragya D Yadav, Vimal Kumar, Sandeep Kumar, Chandrashekhar S Mote, Triparna D Majumdar, Mangesh Gokhale, Pravin Kore, Devendra T Mourya
OBJECTIVES: The objective of this study was to understand natural disease progression in infant CD1 mice after the bite of Aedes aegypti mosquitoes infected by the Zika virus (ZIKV, MR-766 strain). METHODS: A. aegypti mosquitoes were experimentally infected with ZIKV MR-766 strain via the oral feeding route. Infected mosquitoes were allowed to feed on infant CD1 mice. Sick mice were euthanized, and their organs were collected and subjected to real-time RT-PCR, histo-pathology, and immunohistochemistry...
March 29, 2018: Intervirology
Anthony Pinon, Michèle Vialette
Water, a frequent vehicle for the transmission of viruses, may permit their survival, but many environmental factors will have an adverse effect on the viral population. Risk evaluation requires identification of these factors and assessment of the inactivation rate of infectious viruses. A higher temperature means a faster reduction of the viral population, as do increased sunlight, higher antimicrobial concentration, or higher oxygen levels. Another documented impact is linked to the presence of indigenous microbial populations: virus survival is higher in sterile water...
January 10, 2018: Intervirology
Enagnon Kazali Alidjinou, Famara Sane, Swan Firquet, Pierre-Emmanuel Lobert, Didier Hober
Human enteric viruses are associated with several clinical features, especially gastroenteritis. Large amounts of these viruses can be released in the environment and spread to people. Enteric viruses are nonenveloped viruses and have displayed good survival in the environment. They can be significantly resistant in food and water but also on fomites, and this is thought to play a role in transmission, leading to sporadic cases or outbreaks. The survival of enteric viruses on fomites relies on many factors including the virus itself, fomite properties, and extrinsic environmental factors such as temperature or relative humidity...
June 15, 2017: Intervirology
Dhananjay Singh Mankotia, Mohammad Irshad
AIMS: This study describes an immunoassay to detect anti-torque teno virus (TTV) antibodies using a peptide obtained from expression of the N22 region of TTV genotype 2. METHODS: The N22 region (∼500 bp) of TTV genotype 2 was cloned in a pET-28a(+) vector and expressed in ZYM-5052 autoinduction medium. Following metal affinity chromatography, a purified polypeptide was used as an antigen for the development of an immunoassay to detect anti-TTV antibodies in human sera...
2017: Intervirology
Anamarija Slovic, Tanja Kosutic-Gulija, Maja Santak, Jelena Ivancic-Jelecki, Maja Jagusic, Sunčanica Ljubin-Sternak, Gordana Mlinarić-Galinović, Tatjana Vilibić-Čavlek, Irena Tabain, Dubravko Forcic
BACKGROUND: The families Paramyxoviridae and Pneumoviridae comprise a broad spectrum of viral pathogens that affect human health. The matrix (M) protein of these viruses has a central role in their life cycle. In line with this, molecular characteristics of the M proteins from variable viruses that circulated in Croatia were investigated. METHODS: Sequences of the M proteins of human parainfluenza virus (HPIV) 1-3 within the family Paramyxoviridae, human metapneumovirus (HMPV), and human respiratory syncytial virus from the family Pneumoviridae were obtained and analyzed...
2017: Intervirology
Jiyue Wen, Weizhuo Lu, Zhenzhen Liu, Jihong Meng
AIMS: To confirm the different characteristics of genotype-specific and common neutralizing epitopes of hepatitis E virus (HEV). METHODS: A competitive binding assay was established with known genotype-common neutralizing monoclonal antibodies (mAbs) 3G1 and 5G5 as well as genotype-specific neutralizing mAbs 2B1 and 4C5. HEV ORF2 recombinant p166W01 derived from genotype 1 and p166Chn derived from genotype 4 were used as coated antigens, to determine whether the mAbs recognize independent, similar, or overlapping epitopes...
2017: Intervirology
Massimiliano Bergallo, Ilaria Galliano, Paola Montanari, Marco Rassu, Valentina Daprà
OBJECTIVE: Since its discovery, Aichivirus (AiV) A has been detected, with an incidence of 0.9-4.1%, primarily when studying outbreaks of diarrhea in children or young adults. In this paper, we report the first detection of AiV in Piedmont, Italy, in pediatric patients. METHODS: A total of 159 fecal specimens (from 96 males and 63 females) previously screened for rotaviruses, adenoviruses, noroviruses, human parechoviruses, saliviruses, and sapoviruses were collected from infants and children with acute gastroenteritis...
2017: Intervirology
Ruchi Pathak, Pradip V Barde
BACKGROUND AND AIMS: An acute hepatitis, caused by hepatitis E virus (HEV), is a significant global health concern, especially in developing countries. HEV has 1 serotype and 8 genotypes, which are further divided into subtypes. Despite the availability of sporadic cases and outbreak data from India, specific information regarding HEV epidemiological data is lacking from central India. This study was conducted to understand epidemiological and molecular features of HEV in central India...
2017: Intervirology
Fern Baedyananda, Arkom Chaiwongkot, Parvapan Bhattarakosol
OBJECTIVES: The primary replication protein, HPV E1, has been shown to play a role in mitigating host defence and disrupting normal cell cycle processes, leading to the development of cancer. This study investigated the expression profile of HPV16 E1 in various stages of cervical cancer development and the factors that control E1 expression. METHODS: One hundred and twenty-four HPV16-positive cervical samples ranging from normal to CIN 1, CIN 2/3, and SCC lesions were studied...
2017: Intervirology
Mohammed A Hamad, Ahmed Majeed Al-Shammari, Shoni M Odisho, Nahi Y Yaseen
OBJECTIVE: This study aims to provide a molecular and epidemiological characterization of bovine papillomavirus (BPV) infections in Iraq. METHODS: The present study focuses on identifying BPV based on clinical and epidemiological manifestations, histopathological examinations, and polymerase chain reactions (PCR). Samples were collected from 163 animals suffering from cutaneous bovine papillomatosis, including 129 females (79.14%) with an age range of 16-40 months and 34 males (20...
2017: Intervirology
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