Practical RE 186 Labeled Products for Radioimmunotherapy

Award Information
Agency:
Department of Health and Human Services
Amount:
$81,000.00
Program:
SBIR
Contract:
1 R43 CA64032-1,
Solitcitation Year:
N/A
Solicitation Number:
N/A
Branch:
N/A
Award Year:
1994
Phase:
Phase I
Agency Tracking Number:
24886
Solicitation Topic Code:
N/A
Small Business Information
Immunomedics, Inc.
300 American Road, Morris Plains, NJ, 07950
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
N/A
Principal Investigator
 Serengulam Govindan
 (201) 605-8200
Business Contact
Phone: () -
Research Institution
N/A
Abstract
Our ultimate goal is to develop a readily usable rhenium-186-labeled monoclonal antibodyproduct for radioimmunotherapy of colorectal and other types of cancer. Rhenium-186 (t1/2=90h) hasbeta-emissions at 1.07 meV and 0.93 MeV, and imageable gamma-emission (9% abundance) at 137KeV. The Phase-I research will involve preparation of chelator-linked conjugates of a high-affinityCEA-specific antibody, single-vial formulations of the same with tin, and demonstration of expeditiousand sit-specific labeling with rhenium-186 perrhenate. Biodistributions of these radioimmunoconjugatesin tumor-bearing mice will be determined. We will produce a lyophilized antibody preparation which canbe labeled, in one step, to obtain a radioimmunoconjugate with high immunoreactivity, and an in vivoretention resembling that of iodinated antibody. A product fulfilling these criteria will be easily usablein hospital settings, and commercially viable. Initial labeling experiments will be carried out usingrhenium-188 perrhenate, which is readily available from an in-house tungsten-rhenium generator.Extensive animal preclinical studies, and initial clinical studies will be carried out in an SBIR Phase IIprogram.

* information listed above is at the time of submission.

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