Humanized Antibody (MA5) for Breast Cancer Treatment

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: N/A
Agency Tracking Number: 22079
Amount: $49,999.00
Phase: Phase I
Program: SBIR
Awards Year: 1993
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Immunomedics, Inc.
300 American Road, Morris Plains, NJ, 07950
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Shui-On Leung
 (201) 605-8200
Business Contact
Phone: () -
Research Institution
N/A
Abstract
The objective is to re-engineer a murine monoclonal antibody (MAb) by recombinant DNA technologies in order to more effectively treat breast carcinoma patients by the in vivo administration of radioimmunoconjugates. Phase I is focused on the generation of a "humanized" MAb (MA5), which reacts with a mucin - like, breast tumor- associated antigen. Reverse transcribed RNA from the MA5-expressing murine hybridoma will be amplified by the polymerase chain reaction (PCR) using Ig variable heavy and light chain-specific primers, and cloning and sequencing. Selection of the human framework regions (FRs) will then be based on sequence similarities to the mouse FRs, and the mouse complementarily-determining regions (CDRs) and their supporting human FRs will be modeled. Synthesis of the variable domains will be proceeded by PCR amplification of long, overlapping synthetic DNA oligomers encoding the designed sequences and these constructs are completed by ligation into expression vectors bearing human heavy (IgG1) and light chain (k) constant domains. After transfection, antibody expression will be monitored and compared to the holomurine MAb with regard to antigen recognition/binding. Phase II studies will compare the humanized and murine MAbs for targeting tumors in breast cancer patients.

* information listed above is at the time of submission.

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