Metal-binding targeted polypeptide constructs

Drug – bio-affecting and body treating compositions – Radionuclide or intended radionuclide containing; adjuvant... – In an organic compound

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424 91, 424 93, 424 94, 534 10, 534 14, 534 15, 530300, 530324, 530325, 530326, 530327, 530328, 530329, 530330, A61K 5100, A61M 3614

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055936563

ABSTRACT:
This invention relates to the preparation and use of novel open-chain or cyclic polypeptide constructs in which two or more polypeptide chains, in an open-chain construct, or one or more chains, in a cyclic construct, are chemically derivatized such that the resulting construct exhibits both metal-binding capability and tissue-, organ- or cell-targeting selectivity. In particular, the polypeptide constructs of the present invention comprise compounds of the formula (I): ##STR1## in which, "B" is a hydrocarbon backbone, "P" is a polypeptide capable of targeting particular cells, tissues or organs of the body, "A" may be the group --NR'--NR"-- or the group --NR'--NR"--L-- in which L may be an aliphatic or aromatic linker group, R, R', and R" may be the same or different and may be hydrogen or an aliphatic group, m is an integer.gtoreq.2, provided that the groups R, R', R", L and "P" of a given chain may be the same or different from the groups R, R', R", L and "P" of another chain, n is an integer.gtoreq.0; or a pharmaceutically acceptable salt thereof. The constructs of the present invention are capable of binding a variety of metallic species.

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