摘要:
The present invention relates to non-cytopathic negative-strand RNA virus replicons, and methods of making and using the replicons and replicon systems.
摘要:
Provided herein are novel recombinant respiratory syncytial viruses (RSV) having an attenuated phenotype that contain mutations in the M2-2 open reading frame that interfere with the expression of the M2-2 protein. The M2-2 mutations may be present in combination with mutations at other loci. Using methods described herein, combinations of mutations are provided to achieve desired levels of attenuation. The recombinant RSV strains described here are suitable for use as live-attenuated RSV vaccines. Also provided are polynucleotide sequences of the described viruses, as well as methods for producing and using the viruses.
摘要:
Recombinant human parainfluenza virus type 2 (HPIV2) viruses and related immunogenic compositions and methods are provided. The recombinant HPIV2 viruses, including HPIV2 chimeric and chimeric vector viruses, provided according to the invention are infectious and attenuated in permissive mammalian subjects, including humans, and are useful in immunogenic compositions for eliciting an immune responses against one or more PIVs, against one or more non-PIV pathogens, or against a PIV and a non-PIV pathogen. Also provided are isolated polynucleotide molecules and vectors incorporating a recombinant HPIV2 genome or antigenome.
摘要:
Recombinant human parainfluenza virus type 2 (HPIV2) viruses and related immunogenic compositions and methods are provided. The recombinant HPIV2 viruses, including HPIV2 chimeric and chimeric vector viruses, provided according to the invention are infectious and attenuated in permissive mammalian subjects, including humans, and are useful in immunogenic compositions for eliciting an immune responses against one or more PIVs, against one or more non-PIV pathogens, or against a PIV and a non-PIV pathogen. Also provided are isolated polynucleotide molecules and vectors incorporating a recombinant HPIV2 genome or antigenome.
摘要:
RNA synthesis by the paramyxovirus respiratory syncytial virus (RSV), a ubiquitous human pathogen, was found to be more complex than previously appreciated for the nonsegmented negative-strand RNA viruses. Intracellular RNA replication of a plasmid-encoded “minigenome” analog of viral genomic RNA was directed by coexpression of the nucleocapsid (N) protein, nucleocapsid phosphoprotein (P), and the large polymerase (L) protein. But, under these conditions, it appeared that the greater part of mRNA synthesis terminated prematurely. However, coexpression of the M2 (ORF1) gene resulted in the efficient production of full-length mRNA. Thus, these results demonstrate that expression of the upstream ORF1, which encoded the previously described 22-kDa M2 protein, was associated with transcription elongation. Accordingly, the claimed invention is directed toward infectious recombinant RSV particles which comprise a recombinant genome or antigenome, as well as the RSV proteins N, P, L, and the RNA polymerase elongation factor M2. This system will permit the introduction of defined changes into infectious RSV which will prove useful in a variety of applications, such as the analysis of RSV molecular biology and pathogenesis, the development of attenuated RSV immunogenic compositions for the preparation of RSV-specific immunological reagents, and the expression of foreign antigens.
摘要:
This invention discloses compositions of DNA and proteins that are useful for preparing vaccines against human respiratory syncytial virus �HRSV!. The DNA compositions include structural genes coding for native structural viral proteins and immunogenic fragments of these proteins. Host cells transformed with the above DNA compositions are also disclosed. Vaccines made from the native structural viral proteins or immunogenic fragments are also disclosed as well as methods for protecting humans by inoculation with these vaccines.
摘要:
This invention discloses compositions of DNA and proteins that are useful for preparing vaccines against human respiratory syncytial virus [HRSV]. The DNA compositions include structural genes coding for native structural viral proteins and immunogenic fragments of these proteins. Host cells transformed with the above DNA compositions are also disclosed. Vaccines made from the native structural viral proteins or immunogenic fragments are also disclosed as well as methods for protecting humans by inoculation with these vaccines.
摘要:
Recombinant human parainfluenza virus type 2 (HPIV2) viruses and related immunogenic compositions and methods are provided. The recombinant HPIV2 viruses, including HPIV2 chimeric and chimeric vector viruses, provided according to the invention are infectious and attenuated in permissive mammalian subjects, including humans, and are useful in immunogenic compositions for eliciting an immune responses against one or more PIVs, against one or more non-PIV pathogens, or against a PIV and a non-PIV pathogen. Also provided are isolated polynucleotide molecules and vectors incorporating a recombinant HPIV2 genome or antigenome.
摘要:
Recombinant human parainfluenza virus type 2 (HPIV2) viruses and related immunogenic compositions and methods are provided. The recombinant HPIV2 viruses, including HPIV2 chimeric and chimeric vector viruses, provided according to the invention are infectious and attenuated in permissive mammalian subjects, including humans, and are useful in immunogenic compositions for eliciting an immune responses against one or more PIVs, against one or more non-PIV pathogens, or against a PIV and a non-PIV pathogen. Also provided are isolated polynucleotide molecules and vectors incorporating a recombinant HPIV2 genome or antigenome.
摘要:
In this application is described the complete genomic sequence of avian parmyxovirus type 2, strains Yucaipa, England, Kenya and Bangor. The sequences are useful for production of recombinant infective virus, a virus vector, for vaccine development and for therapeutic compositions.