DEVELOPING A HYBRIDIZATION ASSAY FOR HTLV-I AND HTLV-II

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: N/A
Agency Tracking Number: 13728
Amount: $49,987.00
Phase: Phase I
Program: SBIR
Awards Year: 1990
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Sra Technologies Inc
4700 King St #300, Alexandria, VA, 22302
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David A Fuccillo
 (703) 671-7171
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE HUMAN RETROVIRUSES THAT HAVE BEEN EXTENSIVELY CHARACTERIZED (HTLV-I, HTLV-II, HIV-1, AND HIV-2) ALL HAVE ATROPISM FOR THE PERIPHERAL BLOOD MONONUCLEAR CELLS (PBMC). SEROLOGICAL ASSAYS HAVE BEEN USED QUITE SUCCESSFULLY TO IDENTIFY PERSONS WITH PRIOR EXPOSURE TO THESE VIRUSES, BUT THEY FAIL TO DETERMINE A CURRENT INFECTION. VIRUS ISOLATION ASSAYS REQUIRE PROLONGED CO-CULTIVATION OF PATIENTS' PBMC WITH A SUSCEPTIBLE CELL LINE AND HAVE BEEN SHOWN TO LACK SENSITIVITY. A NEWLY DESCRIBED DNA AMPLIFICATION TECHNIQUE, THE POLYMERASE CHAIN REACTION (PCR), APPEARS TO HAVE A GREAT POTENTIAL FOR THE DETECTION OF VIRAL DNA. THE PCR, HOWEVER,REQUIRES HIGHLY TRAINED PERSONNEL, EXPENSIVE EQUIPMENT, AND ABOUT 3 DAYS TO PERFORM AN ASSAY. SRA TECHNOLOGIES, INC., PROPOSES TO DEVELOP A SIMPLE, RAPID,HYBRIDIZATION ASSAY TO DETECT CURRENT INFECTIONS BY THESE RETROVIRUSES. THE METHOD EMPLOYS A PLASTIC CAPILLARY AS A SOLID PHASE TO PERFORM THE HYBRIDIZATION ASSAY. THE CAPILLARY PROVIDES A VERY LARGE REACTIVE SURFACE RELATIVE TO SAMPLE SIZE AND ALSO FORCES THE CLOSE PROXIMITY OF REACTANTS. THE ENVIRONMENT PRODUCES INCREASED SENSITIVITY WITH SHORTER INCUBATION TIMES AND TEMPERATURE REQUIREMENTS. A NONISOTOPIC, ENZYME IMMUNOASSAY AMPLIFICATION DETECTION SYSTEM IS USED TO INDICATE HYBRIDIZATION WITH A KNOWN DNA PROBE.

* information listed above is at the time of submission.

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