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Recombinant viral vectors

Inactive Publication Date: 2010-08-26
INT AIDS VACCINE INITIATIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020]The cells may be CD4 / CCR5+ cells. The novel mutations may escalate trimer abundance on the virus particle and / or increase the stability of the functional trimeric form of Env or EnvG. The method may further comprise determining whether the Env or EnvG immunogens elicit broadly neutralizing anti-Env antibodies.

Problems solved by technology

The loss of CD4+ T cells seriously impairs the body's ability to fight most invaders, but it has a particularly severe impact on the defenses against viruses, fungi, parasites and certain bacteria, including mycobacteria.
However, none of these approaches have yet efficiently elicited neutralizing antibodies with broad specificity.

Method used

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  • Recombinant viral vectors
  • Recombinant viral vectors
  • Recombinant viral vectors

Examples

Experimental program
Comparison scheme
Effect test

example 1

Insertion of the HIV-1 gp41 Epitopes 2F5 and 4E10 into the Membrane-Proximal Region of the Vesicular Stomatitis Virus Glycoprotein

[0117]The membrane-proximal external region (MPER) of HIV-1 gp41, which is recognized by the broadly neutralizing monoclonal antibodies 2F5 and 4E10, is an important target for an HIV vaccine. However, efforts to mimic the 2F5 and 4E10 epitopes outside the context of the gp41 MPER have had minimal success so far. In this study, Applicants used the envelope glycoprotein G of Vesicular Stomatitis Virus (VSV) as a scaffold. VSV G, which forms homotrimeric spikes on the viral surface, is responsible for binding of the virus to cells and promotes fusion of the viral and cellular membranes. The “stem” region of VSV G, which lies immediately N-terminal of its single transmembrane segment, shares sequence similarities with the gp41 MPER. Applicants inserted the gp41 sequences corresponding to the 2F5 and 4E10 neutralizing epitopes into the stem region of VSV G an...

example 2

Using VSV Vectors to Display and Evolve Novel HIV Envelope Immunogens

[0118]The goal of this Example is to design and develop novel HIV-1 envelope protein (Env) immunogens capable of eliciting broadly protective neutralizing antibody responses for use as vaccine candidates. Applicants take advantage of the unique biological properties of vesicular stomatitis virus (VSV) as vaccine delivery vehicle to present and effectively deliver HIV Env immunogens. In addition, Applicants use the high evolutionary potential of VSV to biologically derive unique mutant HIV Envs with enhanced immunogenicity. Novel candidates are used to vaccinate rabbits to determine their capacity to elicit antibodies with enhanced HIV neutralizing activity, and those VSV-vectored vaccines that evoke responses with increased breadth of neutralization are tested in macaques. Applicants achieve these goals by completing the Specific Aims below:[0119]1. Vaccine Platform 1: Optimize HIV Env (derived from SHIVSF162P3) fo...

example 3

Optimization of Immunogen Presentation by G-Stem Vectors

[0123]To develop a platform that can be used to display immunogens on the surface of virus particles or infected cells, Applicants have engineered vesicular stomatitis virus (VSV) vectors to encode a truncated form of the viral transmembrane glycoprotein protein (G) that can be modified to express foreign epitopes anchored to virus envelop or cell membrane. The truncated form of G, called G-Stem (FIG. 18A), retains amino acid sequences that are essential for directing insertion of the molecule into the membrane (the signal peptide), anchoring the protein in the viral envelop or cellular lipid bilayer (the transmembrane domain; TM), and promoting incorporation into the budding viral particle (C-terminal domain). Additionally, a small membrane proximal region of the external domain of G (the Stem) is retained in most constructs because it provides a short stalk on which to append epitopes (FIG. 18B), and importantly, sequences in...

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Abstract

The present relation relates to recombinant vesicular stomatitis virus for use as prophylactic and therapeutic vaccines for infectious diseases of AIDS. The present invention encompasses the preparation and purification of immunogenic compositions which are formulated into the vaccines of the present invention.

Description

INCORPORATION BY REFERENCE[0001]This application claims priority to U.S. provisional patent application Ser. No. 61 / 154,190 filed Feb. 20, 2009.[0002]The foregoing applications, and all documents cited therein or during their prosecution (“appln cited documents”) and all documents cited or referenced herein (“herein cited documents”), and all documents cited or referenced in herein cited documents, together with any manufacturer's instructions, descriptions, product specifications, and product sheets for any products mentioned herein or in any document incorporated by reference herein, are hereby incorporated herein by reference, and may be employed in the practice of the invention.FEDERAL FUNDING LEGEND[0003]This invention was supported, in part, by NIH grant number: R01-AI084840. The federal government may have certain rights to this invention.FIELD OF THE INVENTION[0004]The present invention relates to recombinant vesicular stomatitis virus for use as prophylactic and therapeutic...

Claims

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Application Information

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IPC IPC(8): A61K39/12C12N15/63C12N7/08A61P31/18
CPCA61K39/21C12N2760/20243C12N2740/16134A61K2039/5256A61K39/12A61P31/18A61K39/00C07K14/005C12N7/00C12N2740/16051C12N2760/20234C12N2760/20251G01N33/6854G01N2333/162
Inventor PARKS, CHRISTOPHER L.LORENZ, IVOPHOGAT, SANJAY K.ZAMB, TIMOTHY J.
Owner INT AIDS VACCINE INITIATIVE
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