Affinity enhancement immunological reagents for in vivo detection and killing of specific target cells
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United States of America Patent
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Oct 26, 1993
Grant Date -
N/A
app pub date -
Sep 10, 1987
filing date -
Sep 19, 1986
priority date (Note) -
Expired
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Abstract
Immunological reagents, consisting of a) antibody or fragment conjugates having both an anti-cell specificity and an anti-hapten specificity, and b) synthetic tracers containing at least two hapten sites and at least one site suitable to attach radioactive isotopes, paramagnetic ions, drugs or toxins, are provided. These reagents are capable of binding to target cells in a specific way, and the tracer localizes preferentially on the membrane of antigen-bearing cells, even in the presence of excess antibody conjugate (affinity enhancement). These reagents are usefully employed, either in vitro or in vivo, to detect tumors, metastases, or other tissue injuries, when the synthetic tracer carries radioactive or paramagnetic compounds, and to kill target cells when the synthetic tracer carries radioactive compounds or drugs or toxins.
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