Abstract:
A mannosylated chitosan derivative and a gene delivery system using the same are provided to overcome the disadvantages in an existing viral gene delivery system and to show cell specificity and gene expression with high efficiency. The mannosylated chitosan derivative as a polymer compound has a main repeating unit represented by the formula, wherein n>x and n is an integer of 1 and more, and preferably has a molecular weight of 5K-1,000K. The gene delivery system comprises the above mannosylated chitosan derivative. The mannosylated chitosan derivative is conjugated with DNA to form a complex which is useful for the treatment of a gene-related disease such as a genetic disease, an immune disease and cancer.
Abstract:
Fluorescent surface enhanced raman scattering nano-tagging particles and a method for preparing the same are provided to be easily used for the analysis of the various cytological and moleculogy phenomenon including the apoptosis important in order to maintain the cell homeostasis. Fluorescent surface enhanced raman scattering nano-tagging particles comprises silica core particle(101), silver nano-particle layer(102), polar polymer layer(103), silica shell(104) and functional group layer(105). The silver nano-particle layer surrounds the silica center near particle. The polar polymer layer surrounds the nanosilver particle layer. The silica shell surrounds the polar polymer layer and comprises the fluorescent material. The functional group layer surrounds the silica shell.
Abstract:
A core-shell gold nanoparticle containing magnetic nanoparticles is provided to improve image clearness of MRI(magnetic resonance image) as MRI T2 contrast agent, and efficiency of cancer diagnosis, and rapidly kill the cancer cells by using laser pulse, so that diagnosis and treatment of cancer are performed simultaneously. A core-shell gold nanoparticle contains a silica core having diameter of 50-500 nm and a gold nanoshell having diameter of 50-500 nm with magnetic nanoparticles having diameter of 2-30 nm which contains polyalkylene glycol on the surface of nanoparticles and a target-directing ligand linked to the polyalkylene glycol, wherein the magnetic nanoparticle is selected from magnetite(Fe3O4), maghemite(gamma-Fe3O4), cobalt ferrite(CoFe2O4), manganese oxide(MnO), manganese ferrite(MnFe2O4), ion-platinum alloy, cobalt-platinum alloy and cobalt; the target-directing ligand is selected from anti-HER2/neu, folate, aptamer and TAT peptide.
Abstract:
A double exposure chamber tool and an apparatus for evaluating the nano-particle inhalation toxicity are provided to evaluate the inhalation toxicity more accurately by preventing an inhaled gas of a tested animal from being flown in, allow mouse to breath smoothly by inhibiting the flow velocity of a tested material through inhalation of the mouse and prevent a tester from being directly exposed to the tested material during the inhalation toxicity test. A double exposure chamber tool(200) comprises an outer chamber member(210) in which a front side portion is opened, a rear side portion is formed to be a closely sealed hollow cylindrical shape, a plurality of outer chamber material outlets is formed at the rear side portion by penetrating therethrough, a plurality of mouse holder binding holes is formed at both sides of a side by penetrating therethrough to be faced to one another and three measuring holes(213) is formed at the upper portion of the side by penetrating therethrough; an outer chamber stopper member(220), one end of which is coupled to the front side portion of the outer chamber member and in which a material inlet is formed at the other end by penetrating therethrough; an inner chamber member which is bound to the inside of the outer chamber member and of which a front side portion is opened, a rear side portion is formed to be closely sealed hollow cylindrical shape, a plurality of inner chamber material outlets is formed at the rear side portion by penetrating therethrough and a plurality of mouse holder binding holes is formed at both sides of a side by penetrating therethrough to be faced to one another; a perforated plate member which is bound to the front side portion of the inner chamber member and is a thin plate shape where a plurality of through holes is formed; and a plurality of mouse holder members(250) which is bound to the mouse holder binding hole of the outer chamber member and in which an animal to be tested for evaluating nano-particle inhalation toxicity is input. An apparatus for evaluating the nano-particles inhalation toxicity of an animal to be tested comprises a multi-layered chamber in which a material inlet and a material outlet are formed at both ends of a parallel space member; and a plurality of double exposure chamber tool.
Abstract:
본 발명은 에어로졸 전달 방식으로 유전자를 전달하기 위한 생체 고분자/유전자 복합체에 관한 것이다. 본 발명에 의한 생체고분자/유전자 복합체는 1 차 아미노산의 일부가 당으로 치환된 폴리에틸렌이민(PEI)을 포함하고, 상기 폴리에틸렌이민의 함량이 상기 소정의 유전자의 함량의 2 내지 4 배이다. 본 발명에 의한 에어로졸 전달용 폐암 치료제는 30~40 몰%의 1 차 아미노산이 포도당으로 치환된 폴리에틸렌이민(PEI) 및 PTEN를 코딩 하는 유전자를 포함하는 생체고분자/유전자 복합체를 포함하고, 상기 생체 고분자/유전자 복합체에서 상기 폴리에틸렌이민의 함량이 상기 유전자의 함량의 2 내지 4 배이다. 에어로졸, 유전자, 복합체
Abstract:
본 발명은 폐암의 예방 또는 치료용 유전자 치료제 및 약제 조성물에 관한 것으로, 구체적으로는 폴리에스테르 아민을 합성하여 유전자전달체로 사용하였으며, 상기 유전자전달체의 효율 및 Akt관련 신호와 세포주기조절에 관한 Akt1 siRNA의 잠재적 효력을 평가한 결과, 폴리에스테르 아민/Akt1 siRNA복합체의 에어로졸은 코로만 흡입되는 시스템에 의하여 K- ras 제거된 폐암 마우스에 전달되었고, 전달된 Akt1 siRNA는 폐종양전개를 상당히 억제하였을 뿐만 아니라, 폴리에스테르 아민 매개의 Akt1 siRNA에 의한 에어로졸 전달은 비침습성(invasive) 생체내 유전자치료와 혼용하여 사용할 수 있음을 확인할 수 있었다. 폐암, 폴리에스테르 아민, Akt, siRNA
Abstract:
본 발명은 신규한 바이러스성 유전자전달체에 관한 것으로, 폴레이트 리셉터를 표적할 수 있는 리간드로써 폴레이트를 폴리에틸렌 글리콜과 결합시켜 폴레이트-PEG(F-PEG)를 베큘로바이러스 표면에 도입하여 폴레이트 리셉터 매개의 세포이물흡수 (folate receptor-mediated endocytosis)를 유도하도록 함으로써 낮은 세포독성과 높은 안정성을 가지면서 유전자전달 효율을 조절할 수 있는 동시에 폴레이트 리셉터 파지티브 KB 세포에 훨씬 더 높은 트랜스덕션 효율을 가짐으로써 암세포에만 특이적으로 유전자를 전달할 수 있는 시스템을 구축할 수 있는 효과가 있다. 베큘로바이러스, 폴리에틸렌 글리콜, 폴레이트, 바이러스 벡터, 유전자전달체, 트랜스덕션
Abstract:
An expression inhibitor of VCAM and COX-2 in inflammation disease is provided to offer an anti-inflammation material including GAGs as an active ingredient and to reduce oncogenesis by providing the basic particle mechanism about anti-inflammation effect. An expression inhibitor of VCAM and COX-2 in inflammation disease comprises glycosaminoglycans extracted from the skin of styela clava or sea squirt as an active ingredient. The glycosaminoglycan is chondroitin sulfate and suppresses the activity of the NF- kappa B (nuclear factor kappaB).
Abstract:
본 발명은 유전자전달체로서, 만노스기로 수식이 된 키토산 유도체에 관한 것이다. 또한 본 발명은 상기 유전자 전달체와 DNA와의 복합체, 그리고 상기 복합체를 포함하는 유전자 치료제에 관한 것이다. 본 발명의 유전자전달체는, 기존의 바이러스성 유전자 전달체의 단점을 극복한 비바이러스성 유전자 전달체로서, 세포특이성이면서 고효율의 유전자 발현율을 나타낼 수 있다. 유전자 전달체, 키토산, 만노스 수용체
Abstract:
본 발명은 생분해성인 폴리에틸렌이민과 폴리에테르의 공중합체를 주요 구성성분으로 하는 유전자 전달체에 관한 것이다. 본 발명의 유전자전달체는, 유전자 전달효율은 높으나 그의 세포독성때문에 실제 적용에 한계점을 갖고 있는 PEI 25K를 대신할 수 있는 우수한 유전자전달체로서 그 역할이 기대되며, 아울러 그의 이러한 생분해성과 낮은 세포독성, 높은 유전자전달효율로 인하여 안전한 유전자 전달체로서 적용 가능성이 매우 높을 것으로 기대된다.