The present invention relates to transmission blocking vaccines against malaria. Vaccines of the present invention contain a recombinant virus encoding all, or a unique portion, of the 25 kDa sexual stage surface protein of , Pfs25, or the Pfs25 protein purified from host cells infected with the above-described recombinant virus. Mice inoculated with the recombinant virus developed antibodies with transmission blocking activity. The present invention also relates to recombinant viruses used in the vaccines of the present invention, host cells infected with the recombinant viruses of the present invention and methods of preventing or treating malarial infections using the vaccines of the present invention.
Recombinant Poxviruses Having Foreign Dna Expressed Under The Control Of Poxvirus Regulatory Sequences
Recombinant poxviruses, such as vaccinia, are provided that comprises a segment comprised of (A) a first DNA sequence encoding a polypeptide that is foreign to poxvirus and (B) a poxvirus transcriptional regulatory sequence, wherein (i) said transcriptional regulatory sequence is adjacent to and exerts transcriptional control over said first DNA sequence and (ii) said segment is positioned within a nonessential genomic region of said recombinant poxvirus. Vaccines, carriers, cells, and media comprising recombinant poxviruses, and methods of immunization with recombinant poxviruses also are provided.
Compositions Containing Recombinant Poxviruses Having Foreign Dna Expressed Under The Control Of Poxvirus Regulatory Sequences
Bernard Moss - Bethesda MD, US Michael Mackett - Manchester, GB Geoffrey L. Smith - Oxford, GB
Assignee:
The United States of America as represented by the Department of Health and Human Services - Washington DC
International Classification:
C12N 7/01 C12N 5/10 A61K 39/275 A61K 39/285
US Classification:
4352351, 435325, 4353201, 4241991
Abstract:
Recombinant poxviruses, such as vaccinia, are provided that comprises a segment comprised of (A) a first DNA sequence encoding a polypeptide that is foreign to poxvirus and (B) a poxvirus transcriptional regulatory sequence, wherein (i) said transcriptional regulatory sequence is adjacent to and exerts transcriptional control over said first DNA sequence and (ii) said segment is positioned within a nonessential genomic region of said recombinant poxvirus. Vaccines, carriers, cells, and media comprising recombinant poxviruses, and methods of immunization with recombinant poxviruses, also are provided.
Methods Of Immunization Using Recombinant Poxviruses Having Foreign Dna Expressed Under The Control Of Poxvirus Regulatory Sequences
Bernard Moss - Bethesda MD, US Michael Mackett - Manchester, GB Geoffrey L. Smith - Oxford, GB
Assignee:
The United States of America as represented by the Department of Health and Human Services - Washington DC
International Classification:
A61K 39/275 A61K 39/285
US Classification:
4241991, 4242321
Abstract:
Recombinant poxviruses, such as vaccinia, are provided that comprises a segment comprised of (A) a first DNA sequence encoding a polypeptide that is foreign to poxvirus and (B) a poxvirus transcriptional regulatory sequence, wherein (i) said transcriptional regulatory sequence is adjacent to and exerts transcriptional control over said first DNA sequence and (ii) said segment is positioned within a nonessential genomic region of said recombinant poxvirus. Vaccines, carriers, cells, and media comprising recombinant poxviruses, and methods of immunization with recombinant poxviruses also are provided.
Recombinant Vaccinia Virus Containing A Chimeric Gene Having Foreign Dna Flanked By Vaccinia Regulatory Dna
Methods and compositions are provided for the use of vaccinia virus or other poxviruses as vectors for expression of foreign genes. Expression of foreign genes is obtained by combining vaccinia virus transcriptional regulatory sequence with uninterrupted foreign protein coding sequences in vitro to form a chimeric gene. The chimeric gene is flanked by DNA from a non-essential region of the vaccinia virus genome to provide sites for in vivo homologous recombination. These steps are facilitated by the construction of plasmids that contain multiple restriction endonuclease sites, next to the vaccinia transcriptional regulatory sequences, for insertion of any foreign protein coding sequence. Transfection procedures are used to introduce the DNA into cells where homologous recombination results in the insertion of the chimeric gene into a non-essential region of the vaccinia virus genome. Infectious vaccinia virus recombinants are distinguished or selected by expression of the foreign gene, loss of activity of a vaccinia virus gene, or by DNA—DNA hybridization. Expression of the foreign gene is obtained by infecting cells or animals with the recombinant vaccinia virus.
Mva Expressing Modified Hiv Envelope, Gag, And Pol Genes
Bernard Moss - Bethesda MD, US Patricia L. Earl - Chevy Chase MD, US Linda Wyatt - Rockville MD, US Leigh Anne Eller - Kampala, UG Thomas C. VanCott - Brookeville MD, US Matthew Edward Harris - Poway CA, US
Assignee:
The Government of the United States of America, as represented by the Secretary, Department of Health and Human Services - Washington DC Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. - Rockville MD The United States of America, as represented by the Secretary, Department of the Army - Washington DC
International Classification:
A61K 39/12
US Classification:
4242041, 4242051
Abstract:
The invention provides modified virus Ankara (MVA), a replication-deficient strain of vaccinia virus, expressing human immunodeficiency virus (HIV) env, gag, and pol genes.
Bernard Moss - Bethesda MD, US Linda Wyatt - Rockville MD, US Patricia Earl - Chevy Chase MD, US Harriet L. Robinson - Atlanta GA, US
Assignee:
Emory University - Atlanta GA
International Classification:
A61K 35/12 A61P 43/00
US Classification:
514 44, 530350
Abstract:
The invention provides modified virus Ankara (MVA), a replication-deficient strain of vaccinia virus, expressing human immunodeficiency virus (HIV) env, gag, and pol genes.
There are two distinct genetic clades, or varieties, explains Bernard Moss, a virologist at the U.S. National Institute of Allergy and Infectious Diseases (NIAID). One, Congo Basin monkeypox, kills one in 10 of those infected. The current global outbreak is confirmed to be the second variety, the le