Abstract:
PURPOSE: A drug delivery system for treating liver cancer based on interventional injection of temperature- and pH-sensitive hydrogel is provided to stably support an anticancer agent and to enable deep injection into microvessel. CONSTITUTION: A drug delivery system for treating liver cancer based on interventional injection of temperature- and pH-sensitive hydrogel contains a drug delivery system with a block copolymer and a therapeutic drug supported inside the drug delivery system. The drug delivery system further contains a contrast agent inside. The block copolymer is a poly(beta-amino ester)-based block copolymer, a polyamidoamine-based polymer, a polyaminoester urethane-based block copolymer, or a sulfonamide-based block copolymer. The poly(beta-amino ester)-based block copolymer is poly(beta-amino ester)-polyethylene glycol-poly(beta-amino ester)(PAE-PEG-PAE), PAE-PCLA-PEG-PCLA-PAE, PAE-PCL-PEG-PCL-PAE or PAEPCGA-PEG-PCGA-PAE. [Reference numerals] (AA) Embodiment 14; (BB) Embodiment 15; (CC) Embodiment 16; (DD) Control group
Abstract:
본 발명은 간동맥 가이딩 카테타링이 가능한 블록공중합체로 이루어진 약물전달체와 상기 약물전달체 내부에 담지된 치료 약물을 포함하며, 상기 약물전달체가 외부에서는 졸상이고, 간동맥에서는 젤 상태로 전이되어 간동맥의 혈액공급을 지연 내지 차단하며, 간동맥에서 젤 상태로 전이되는과정에서 상기 치료 약물이 서서히 방출되는 온도 및 pH 민감성 하이드로젤의 인터벤셔널 인젝션에 기반한 간암치료용 약물전달체를 제공한다.
Abstract:
PURPOSE: A multi-block copolymer is provided to have biodegradability sensitive not to only temperature, but pH, and to able to retrain initial burst release phenomenon of drugs. CONSTITUTION: A multi-block copolymer comprises a first block having an ester bond, a second block combining a urethane bond, and an ethylene glycol based third block. The first block having an ester bond is poly(β-aminoester). The second block formed of polyurethanes which has alkyl diisocyanate as a starting material. A manufacturing method of the multi-block copolymer comprises a step of polymerizing poly(β-aminoester), a polyethylene glycol based compound, and alkyl diisocyanate which is one starting material of polyurethane based oligomer.
Abstract:
PURPOSE: A temperature and pH-sensitive star-shaped block copolymer with excellent bioadhesion is provided to ensure safety in vivo and to diagnose diseases. CONSTITUTION: A temperature and pH-sensitive star-shaped block copolymer with excellent bioadhesion contains 4-arm polyethylene-based compounds and poly(beta-amino ester)-based oligomers. The oligomers are bonded with the 4-arm polyethylene glycol by Michael reaction. The poly(beta-amino ester)-based oligomers are formed by polymerization of dioldiacrylate compounds and amine compounds in a molar ratio of 1 : 0.5-1:2. An injectable hydrogel type drug delivery system contains the block copolymers or hydrogel and physiologically active materials.
Abstract:
본 발명은 기존의 폴리우레탄 하이드로젤의 단점이었었던 생분해성을 획기적으로 개선코자 생분해성이 우수한 폴리(β-아미노 에스터) 계열의 출발물질을 미첼반응(Michael reaction)을 시켜 형성된 폴리(β-아미노 에스터) 올리고머(A)에 폴리에틸렌글리콜 계열 화합물(B)과 폴리우레탄 계열의 출발물질(C)을 혼합하여 우레탄반응을 통하여 제조한 폴리(β-아미노에스터 우레탄)-폴리에틸렌 다중블록 공중합체인 하이드로젤로서, 온도 민감성인 친수성과 소수성기를 동시에 지닌 양친성(兩親性) 특성과 주변환경의 pH에 따라 이온화 특성이 변화하는 pH 민감 특성을 통해 고분자 하이드로젤 구조를 형성할 수 있으며, 이를 통해 인체 내 주사시 체내 pH 변화에 따른 장기 서방성 약물 전달체로 사용될 수 있는 폴리(β-아미노에스터 우레탄)-폴리에틸렌글리콜 공중합체 및 이의 제조방법과 이를 이용한 약물전달체를 제공한다.