31 results about "Interfering virus" patented technology

The present invention provides for the treatment or prevention of Hepadnaviridae infection and disease caused by Hepadnaviridae infection. In particular, the invention provides compositions and methods that affect the ability of Hepadnaviridae to utilize the host's cellular machinery as part of the virus' lifecycle. The invention relates to the discovery that interfering with the normal ability of viruses to utilize the host cell machinery with LSD1 inhibitors reduces HBV replication. Thus, the treatment and prevention of Hepadnaviridae infection and disease caused by Hepadnaviridae according to the invention comprises administering to an individual in need of treatment, a therapeutically effective amount of a LSD1 inhibitor. The individual in need of treatment can be a human or, e.g., another mammal.

Attenuated influenza virus variants comprising substitutions in NS1 that interfere with viral replication and phosphatidylinositol 3-kinase activation are described. NS1 variant polypeptides, polynucleotides encoding NS1 variant polypeptides, a reverse genetics system for producing attenuated influenza virus NS1 variants, immunogenic compositions comprising live attenuated influenza virus NS1 variants, methods of stimulating an immune response against influenza virus, methods of interfering with influenza virus replication, and methods of treating and preventing influenza virus infection are described.

Cloned, i.e. defined, defective interfering (DI) influenza A virus is produced in embryonated hens eggs using a method which generates large quantities of DI virus material. Cloned DI virus is then used in tests on mice and ferrets given a lethal challenge of wild-type influenza A virus. When cloned DI influenza A virus is co-administered with a lethal dose of virulent influenza A virus, mice are protected compared to a control of inactivated cloned DI influenza A virus. Mice which survived the administration of cloned DI influenza A virus and infective challenge virus are three weeks later still protected against lethal challenge with infective virus. Control mice which received only cloned DI influenza A virus and no lethal challenge are not protected three weeks later on lethal challenge with infective virus.

The present invention is directed to methods and compositions that are effective in the inhibition of viral replication. In particular, the methods and compositions are effective at interfering with the activity of host cell proteins required in viral replication. For example, an embodiment of the invention is directed to inhibition of flavivirus replication wherein the replication is affected by changing the normal interactions of the host cell protein TIAR or TIA-1.

Cloned, i.e. defined, defective interfering (DI) influenza A virus is produced in embryonated hens eggs using a method which generates large quantities of DI virus material. Cloned DI virus is then used in tests on mice and ferrets given a lethal challange of wild-type influenza A virus. When cloned DI influenza A virus is co-administered with a lethal dose of virulent influenza A virus, mice areprotected compared to a control of inactivated cloned DI influenza A virus. Mice which survived the administration of cloned DI influenza A virus and infective challange virus are three weeks later still protected against lethal challange with infective virus. Control mice which received only cloned DI influenza A virus and no lethal challange are not protected three weeks later on lethal challange with infective virus. A therapeutic benefit of administering cloned DI influenza a virus is found when the administration takes place in less than 48 hours after challange with infective virus. Cloned DI influenza A virus of one subtype is found to act in vivo as an effective antiviral against the same or any other sub-type of influenza A virus. The antiviral effect has been found to have both a therapeutic and a prophylactic application against influenza A infection in humans, mammals and birds.

The present invention is directed to methods and compositions that are effective in the inhibition of viral replication. In particular, the methods and compositions are effective at interfering with the activity of host cell proteins required in viral replication. For example, an embodiment of the invention is directed to inhibition of flavivirus replication wherein the replication is effected by changing the normal interactions of the host cell protein TIAR or TIA-1.

The invention relates to the technical field of RNA (Ribonucleic Acid) interference, in particular to an RNA interference virus vector which interferes the expression of a target gene by expressing shRNAmir carried by a miR-AB framework based on human miR-30pril-miRNA. The miR-AB sequence is regulated and controlled by a plurality of eukaryotic promoters; the RNA interference virus vector traces cells subjected to RNA interference through fluorescent protein reporter molecules, or screens the cells subjected to RNA interference through antibiotics. According to the present invention, the miR-AB sequence in the RNA interference virus vector is regulated and controlled by a variety of eukaryotic promoters so as to easily achieve the application of the RNA interference virus vector in a variety of eukaryotic cells, and the virus vector can screen the cells subjected to RNA interference through antibiotics by depending on the Puromycin resistance, and can also trace the cells subjected to RNA interference by depending on the fluorescent protein reporter molecule; therefore, a plurality of target genes in the eukaryotic cell can be subjected to single-gene interference and multi-gene arbitrary combination interference at the same time in a multi-virus co-infection mode, so that the functions of the plurality of target genes in the eukaryotic cell are analyzed at the same time.

The present invention relates generally to an antibody that binds specifically to a neutralization epitope at the surface of papillomavirus (residues 36-49 of the minor capsid L2) that does not interfere with virus entry into endosomes and lysosomes. This antibody neutralizes infection of the virus in a dose dependent manner.