Wu K, Yang J, Liu J, Kopeček J. Coiled-coil based drug-free macromolecular therapeutics: in vivo efficacy.
J Control Release 2011;
157:126-31. [PMID:
21843563 DOI:
10.1016/j.jconrel.2011.08.002]
[Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 06/25/2011] [Accepted: 08/03/2011] [Indexed: 10/17/2022]
Abstract
We evaluated a new concept in cancer therapy, coiled-coil mediated induction of apoptosis in Raji B cells, for treatment of human B-cell lymphoma in a preclinical animal model. The system is composed of a pair of complementary coiled-coil peptides, CCE and CCK, forming antiparallel heterodimers; Fab' fragment of the 1F5 anti-CD20 antibody; and N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer. One peptide is conjugated to the Fab' fragment (Fab'-CCE), the other is conjugated in multiple grafts to polyHPMA (CCK-P; P is the HPMA copolymer backbone). Intravenous administration of Fab'-CCE conjugate, followed by the administration of CCK-P produced long-term survivors in SCID (C.B.-17) mice bearing human B-lymphoma xenografts. The rationale of the design is the absence of low molecular weight drugs and the fact that crosslinking of CD20 at B-cell surface results in apoptosis. This approach creates a new paradigm for manipulating molecular recognition principles in the design of improved cancer treatment.
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