Other

Stella Pharma Corporation

Kyoto University

Redox Bioscience Inc.

Kawakami, Koji

Tomohisa Horibe

Koji Kawakami

Masayuki Kohno

Mari Haramoto

Liying Yang

Oumi Nakajima

Junji Yodoi

Aoi Son

Noriko Kato

Tomijiro Hara

Norihiko Kondo

It is an object of the present invention to provide a substance usable as an anticancer agent or DDS, which has intracellular stability, which is capable of evading side effects from functional disorder with respect to normal cells, or which has instantaneous effect. The inventors developed a novel chimeric peptide targeting cancer cells which overexpress EGFR or the like using a binding peptide such as a peptide sequence binding to EGFR, and a lytic peptide sequence, thereby solving such an object. Particularly, by using a chimeric peptide including an EGF receptor-binding peptide or the like and a cytotoxic peptide, this object was solved.

Selective anticancer chimeric peptides which bind neuropilin receptor

Selective anticancer chimeric peptides which bind transferrin receptor

Disclosed is a substance which is not accumulated stably in cells, does not cause the dysfunction of normal cells, and so on, and therefore can be used as an anti-cancer agent or in a DDS without having any adverse side effects. It is found that Hsp90 alone cannot exhibit its function as a chaperone in assisting the refolding of a protein such as survivin, but can exhibit this function when Hop (which is one of the partner proteins of Hsp90) binds to Hsp90. Thus, specifically disclosed herein is a chimeric peptide comprising of an Hsp90 TPR domain binding peptide and a cell-penetrating peptide.

Hsp9O-targeted anti-cancer chimeric peptide

Disclosed is a screening method which can select a substance having an influence on the binding between thioredoxin and MIF. The screening method is characterized in that a test substance capable of enhancing the binding between a polypeptide belonging to the thioredoxin family and a macrophage migration inhibitory factor is selected through the steps of mixing at least one binding substance selected from the substances (1) to (4) shown below with the test substance, allowing the binding substance to bind to the macrophage migration inhibitory factor, and confirming the binding between the binding substance and the macrophage migration inhibitory factor: (1) a polypeptide belonging to the thioredoxin family; (2) a protein which comprises an amino acid sequence produced by deleting, substituting or adding one or several amino acid residues in an amino acid sequence for a polypeptide belonging to the thioredoxin family and has the same activity as that of a polypeptide belonging to the thioredoxin family; (3) a gene encoding the polypeptide (1); and (4) a gene encoding the protein (2).

Method of screening for a substance that strengthens a bond between thioredoxin and macrophage migration inhibition factor

Selective anticancer chimeric peptide comprising an EGF receptor-binding peptide and a cytotoxic peptide

Growing community of inventors

Kyoto, Japan

Tomohisa Horibe