The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 2021
Filed:
Jul. 25, 2017
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Dai Kurihara, Tokyo, JP;
Tsuyoshi Fukuda, Tokyo, JP;
Yuki Kawano, Tokyo, JP;
Keiichirou Yamamoto, Tokyo, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a polymeric micelle type DDS preparation that may efficiently exhibit pharmacological activity effects by enhancing migration characteristics, penetrability, and retention characteristics toward a diseased target tissue such as a tumor tissue or an inflammation-affected tissue, and thereby enhancing the action of a pharmacologically active substance. Disclosed is a block copolymer (A) having a hydrophilic polymer segment linked to a hydrophobic polymer segment, the hydrophilic polymer segment containing a polyethylene glycol chain, and the hydrophobic polymer segment containing a polyamino acid chain having a hydrophobic substituent in a side chain, wherein the hydrophilic polymer segment has a target binding site bonded thereto, and the main chain polymer combining the polyethylene glycol chain and the polyamino acid chain has a molecular weight of not less than 2 kilodaltons and not more than 10 kilodaltons.