: Osel was founded to develop and commercialize a novel approach to prevent vaginal HIV transmission in women. We propose to create bifunctional proteins containing an HIV-binding domain (CD4) and a lactobacillus-binding domain. Such bifunctional proteins will multivalently crosslink HIV to the lactobacilli abundantly resident on the mucosal microflora, thus preventing immobilized viral particles from progressing to infect underlying host cells. Bound viruses may be inactivated by either hydrogen peroxide produced by lactobacilli or removed from the body by normal sloughing of mucosal bacteria. Thus, application of such bifunctional proteins onto the vaginal mucosa up to 24 hours before vaginal intercourse should significantly reduce the number of available HIV particles introduced by semen, thereby reducing or eliminating the risk of viral transmission. This novel approach would create a novel barrier to viral transmission that is different from traditional approaches. Therefore, it should act synergistically with vaccines, condoms, or other potential methods of protection. The underlying concept is generally applicable to other viruses that infect at other anatomical sites, such as respiratory or intestinal mucosa. The work being proposed include (i) selection of lactobacilli-specific binding peptides (LSP) via combinatorial phage display libraries followed by their genetic transfer to the soluble CD4 protein to create bifunctional CD4-LSP proteins, and (ii) testing the ability of such bifunctional proteins to neutralize HIV in vitro in the presence of lactobacilli.

Proposed Commercial Applications

NOT AVAILABLE

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Small Business Innovation Research Grants (SBIR) - Phase I (R43)
Project #
1R43AI048267-01A1
Application #
6404776
Study Section
Special Emphasis Panel (ZRG1-AARR (10))
Program Officer
Ryan, Kevin W
Project Start
2001-07-15
Project End
2002-01-15
Budget Start
2001-07-15
Budget End
2002-01-15
Support Year
1
Fiscal Year
2001
Total Cost
$139,650
Indirect Cost
Name
Osel, Inc.
Department
Type
DUNS #
017444147
City
Mountain View
State
CA
Country
United States
Zip Code
94043