AN ANTIGEN-SPECIFIC IMMUNE DEVICE FOR MYASTHENIA GRAVIS

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: N/A
Agency Tracking Number: 13990
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1990
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
200 Constitution Dr, Menlo Park, CA, 94025
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Sohel Talib
 (415) 326-7302
Business Contact
Phone: () -
Research Institution
N/A
Abstract
ALTHOUGH MYASTHENIA GRAVIS (MG) IS THE BEST CHARACTERIZED HUMAN AUTOIMMUNE DISEASE, NO CURE IS AVAILABLE. ANTIBODIES TO NICOTINIC ACETYLCHOLINE RECEPTORS (ACHRS) OF MUSCLE ARE DETECTABLE IN 90 PERCENT OF PATIENTS AND CAUSE THE WEAKNESS OF MG. ANTIBODY LEVELS CAN BE DECREASED BY PLASMAPHERESIS, AND THIS IS CORRELATED WITH IMPROVED CLINICAL STATUS. THIS RESEARCH WILL ESTABLISH THE FEASIBILITY OF DEVELOPING AN ANTIGEN-SPECIFIC IMMUNOADSORPTION DEVICE TO REMOVE ANTI-ACHR IN MG. TOWARD THIS GOAL, APPLIED IMMUNESCIENCES, INC., HAS RECENTLY DESIGNED, CLONED, AND EXPRESSED THE MAJOREXTRACELLULAR DOMAIN (AMINO ACID RESIDUES 1-210) OF THE ALPHA SUBUNIT OF HUMAN ACHR. THE SPECIFIC AIMS ARE: (1) PURIFICATION OF RECOMBINANT ACHR (RACHR) FROM ESCHERICHIA COLI BY CONVENTIONAL AND AFFINITY CHROMATOGRAPHIC TECHNIQUES, (2) CHARACTERIZATION OF RACHR BY PHYSICAL AND BIOLOGICAL TECHNIQUES, (3) COVALENT IMMOBILIZATION OF RACHR ONTO CELLULOSIC MEMBRANES, AND (4) EVALUATION OF THE EFFICACY OF IMMOBILIZED RACHR FOR SPECIFIC REMOVAL OF PATHOLOGIC ANTIBODY FROM MG PATIENT SERAUSING A COMBINATION OF IMMUNOASSAYS. DEVELOPMENT OF AN ANTIGEN-SPECIFIC IMMUNOADSORPTION DEVICE REPRESENTS A SIGNIFICANT ADVANCE IN THE TREATMENT OF MG BECAUSE IT WILL ALLOW FOR THE SAFE AND EFFECTIVE REMOVAL OF MG PATIENT AUTOANTIBODIES. IN CONJUNCTION WITH SPECIFIC T-CELL THERAPY, THERE IS NOW HOPE FOR ANTIGEN-SPECIFIC IMMUNOMODULATIONS THAT MAY EVEN LEAD TO A LONG-TERM CURE.

* Information listed above is at the time of submission. *

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