On the basis of the conservation of neuraminidase (N) active-site residues in influenza virus N and paramyxovirus hemagglutinin-neuraminidase (HN), it has been suggested that the three-dimensional (3D) structures of the globular heads of the two proteins are broadly similar. In this study, details of this structural similarity are worked out. Detailed multiple sequence alignment of paramyxoviru...

In 2004, 3 and 4 strains of avian influenza virus (subtype H5N1) were isolated from waterfowl and chickens, respectively, in central People's Republic of China. Viral replication and pathogenicity were evaluated in chickens, quails, pigeons, and mice. We analyzed the sequences of the hemagglutinin and neuraminidase genes of the isolates and found broad diversity among them.

Treatment of respiratory viral infections remains a global health concern, mainly due to the inefficacy available drugs. Therefore, discovery novel antiviral compounds is needed; in this context, antimicrobial peptides (AMPs) like temporins hold great promise. Here, we discovered that harmless temporin G (TG) significantly inhibited early life-cycle phases influenza virus. The vitro hemagglutin...

Submit Manuscript | http://medcraveonline.com Abbreviations: NDV: Newcastle Disease Virus; APMV-1: Avian Paramyxovirus Type I; IFN: Interferon; CTLA-4: Cytotoxic T Lymphocyte Associated Antigen-4; RCC: Renal Cell Carcinoma; HNSCC: Head and Neck Squamous Cell Carcinoma; IL-2: Interleukin-2; DTH: Delayed Type Hypersensitivity; Gy: Gray; BCG: Bacillus Calmette-Guerin; HN: Hemagglutinin-Neuraminida...

Prior to serological testing, influenza viruses are typically propagated in eggs or cell culture. Recent human H3N2 strains bind to cells with low avidity. Here, we isolated nine primary H3N2 viral isolates from respiratory secretions of children. Upon propagation in vitro, five of these isolates acquired hemagglutinin or neuraminidase mutations that increased virus binding to cell surfaces. Th...

Equine infectious anemia (EIA) virus which was propagated on an equine dermal cell line agglutinated guinea pig erythrocytes. Viral fluids containing about 10(7.5) mean tissue culture infective doses/ml showed hemagglutinating (HA) titers ranging from 16 to 32 units/0.05 ml. Results of cesium chloride equilibrium density gradient centrifugation revealed that the hemagglutinin was inseparable fr...

Analysis of the sequences of all eight RNA segments of the influenza A/G oose/Guangdong/1/96 (H5N1) virus, isolated from a sick goose during an outbreak in Guangdong province, China, in 1996, revealed that the hemagglutinin (HA) gene of the virus was genetically similar to those of the H5N1 viruses isolated in Hong Kong in 1997. However, the remaining genes showed greater similarity to other av...

BACKGROUND Influenza viruses show a significant capacity to evade host immunity; this is manifest both as large occasional jumps in the antigenic phenotype of viral surface molecules and in gradual antigenic changes leading to annual influenza epidemics in humans. Recent mouse studies show that avidity for host cells can play an important role in polyclonal antibody escape, and further that ele...