Abstract:
본발명은갑각류에서유래된양전하를갖는다당류인키토산과카테콜합성물질을이용한췌장소도막의표면개질방법에관한것으로, 구체적으로, 본발명의표면개질방법에의해변형된췌장소도는기존의클러스터형태에서단일세포로쉽게부서지는성질이완화되고혈액과의초기접촉시나타나는염증매개물질활성화를억제하여혈액응고를방지하여이식초기의췌장소도손실을최소화할수 있고, 또한키토산이결합된췌장소도막 표면에폴리에틸렌글리콜과같은중합체를가교제로이용하여다층성표면개질을추가적으로도입하여숙주면역반응을최소화하고이식된췌장소도의생존기간을연장시킬수 있다.
Abstract:
본 발명은 고분자를 이용한 췌장소도 봉입용 캡슐(encapsulated pancreatic islets) 표면의 개질 방법에 관한 것으로서, 구체적으로 췌장소도를 캡슐로 봉입(encapsulation)한 후 다양한 고분자 결합(polymeric grafting)을 이용하여 폴리에틸렌 글리콜(polyethylene glycol, PEG)과 같은 고분자 사슬을 췌장소도 캡슐의 표면에 결합시켜 표면을 개질하는 방법에 관한 것이다. 본 발명의 표면개질 방법에 의해 표면이 변형된 췌장소도는 이식시 면역거부 반응을 최소화할 뿐만 아니라, 섬유아세포에 의한 섬유화도 막을 수 있어 췌장소도의 효율과 생존기간을 연장시킬 수 있다.
Abstract:
PURPOSE: A secretion signal peptide-linked exendin-4 transduced pancreatic islet and a method for treating diabetes using the same are provided to improve insulin secretion ability and to reduce cell necrosis rate. CONSTITUTION: A pancreatic islet cell cluster is transduced with a vector with a gene construct containing genes encoding secretion signal peptide and a gene encoding exendin-4. The pancreatic islet cell cluster is prepared by culturing the pancreatic islet cell cluster for 3-9 days. The surface of the pancreatic islet cell cluster is modified with biocompatible polymers, PEG(polyethylene glycol). A composition for treating diabetes contains the pancreatic islet cell cluster as an active ingredient.
Abstract:
PURPOSE: An integrin alpha-V-beta 3 binding lipid derivative which selectively recognizes cells expressing integrin is provided to enhance drug delivery efficiency to various cancer cells. CONSTITUTION: An integrin alpha-V-beta 3 binding lipid derivative has a structure of chemical formula 1 or 2. A composition for preparing integrin alpha-V-beta 3-recognizing lipid nanoparticle contains the integrin alpha-V-beta 3 binding lipid derivative. The composition additionally contains positive charge lipid, neutral lipid or negative charge lipid. The lipid nanoparticle is formulated in liposome, micelle, emulsion or solid lipid nanoparticle. A pharmaceutical composition contains the alpha-V-beta 3-recognizing lipid nanoparticle and drug.