Metal-binding targeted polypeptide constructs

US5449761A · kind A · utility

Assignee

• CYTOGEN, INC. · US

Inventors

• Benjamin A. Belinka, Jr. · Toms River, US
• Daniel J. Coughlin · Lawrence, US
• Vernon L. Alvarez · Levittown, US
• Richard Wood · Princeton, US

Key dates

• Filing date: Sep 28, 1993
• Grant date: Sep 12, 1995
• Expiry date: Sep 28, 2013

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2123/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

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.