Abstract:
PURPOSE: A bioactive substance delivery system containing cationic polymer conjugates is provided to stably maintain bond between the conjugate and genes. CONSTITUTION: A bioactive substance delivery system contains cationic polymer conjugates in which pullulan derivatives and polyethylene imine are conjugated. The pullulan derivative has a methyl group, bile acid, cholesterol, or non-ionic poly amino acid introduced to pullulan. A method for preparing the delivery system comprises: a step of acetylating the pullulan to synthesize a hydrophobic pullulan derivative; a step of polymerizing the hydrophobic pullulan derivative and a crosslinking agent; and a step of polymerizing the polymer and polyethylene imine. A gene therapeutic agent contains the delivery system as an active ingredient.
Abstract:
PURPOSE: A radiopacity poly(pivalic acid vinyl/acetic acid vinyl)/poly(vinyl alcohol) microsphere embolic material is provided to improve simplicity. CONSTITUTION: A poly(vinyl pivalate/acetic acid vinyl)/poly(vinyl alcohol) microsphere embolic material comprises: a 54-63% of syndiotactic dyad by copolymerizing mixture of pivalate monomer and acetic acid vinyl monomer; a core having poly(vinyl pivalate/acetic acid vinyl); and polyvinyl alcohol outer cover prepared by saponification of a part of core. A method for manufacturing the poly(vinyl pivalate/acetic acid vinyl)/poly(vinyl alcohol) microsphere embolic material comprises: a step of copolymerizing a mixture of vinyl pivalate monomer and acetic acid vinyl monomer to form the core; a step of adding 0.1-100 weight part of inorganic salt and milling; and a step of performing saponification.
Abstract:
PURPOSE: A nanoparticle formed by autoagglutination is provided to use as a carrier of various drugs and to ensure sustained release of drug. CONSTITUTION: A nanoparticle is formed by autoagglutination of amphipathic hyaluronic acid and drug. The hyaluronic acid is acetylated. A method for preparing the nanoparticle comprises: a step of dissolving hyaluronic acid and C2-C4 alkanoic acid anhydride in a solvent to obtain C2-C4 alkanoylated hyaluronic acid product; a step of mixing the product with water to precipitate C2-C4 alkanoylated hyaluronic acid; a step of dialyzing hyaluronic acid and drug into a dialyzer; a step of performing autoagglutination of the C2-C4 alkanoylated hyaluronic acid and drug to form nanoparticles; and a step of freeze-drying the nanoparticles.
Abstract:
PURPOSE: A peptide or protein drug, and micro sphere particle containing PLGA(Poly-lactide-co-glycolide) are provided to form ionic binding complex with polysaccharide. CONSTITUTION: A PLGA micro sphere particle contains a peptide or protein drug, PLGA and polysaccharide with sulfate residue in the PLGA micro sphere particle. A method for preparing the PLGA micro sphere particle comprises: a step of preparing peptide or protein drug solution to have pH concentration under isoelectric point of the peptide or protein drug; a step of preparing liquid solution containing polysaccharide with sulfate residue to have pH concentration under isoelectric point; a step of mixing prepared solutions to form polysaccharide-peptide or polysaccharide-protein complex; a step of stirring mixed solution with PLGA solution to produce w/o emulsion; a step of dispersing the w/o emulsion in dispersing medium to form PLGA micro sphere particle; and a step of collecting formed PLGA micro sphere particle.
Abstract:
A nano-aggregate having pullulan is provided to be used for delivering an anti-cancer agent by being able to apply as a bio-material due to biodegradability thereof and showing excellent characteristics as a drug carrier. A nano-aggregate is prepared by self-assembling an ester-bond conjugate of a hydrophobicized monomer cyclic compound having a carboxyl group and pullulan, wherein the conjugate is a conjugate of pullulan-folic acid, a conjugate of pullulan-biotin, or a conjugate of pullulan-bile acid. To transfer a drug such as protein, nucleic acid, chemical materials and natural materials, the nano-aggregate is used.
Abstract:
본 발명은 지질-광감작제 나노결합체 및 이의 제조 방법에 관한 것으로, 더욱 상세하게는 지질 리포좀 내부에 광감작제가 봉입되거나, 지질 리포좀 외부에 광감작제가 결합되어 구성되며, 지질과 광감작제를 연결하는 연결자는 미생물이 분비하는 효소에 의하여 특이적으로 분해되는 것을 특징으로 하는 지질-광감작제 나노결합체 및 이의 제조 방법에 관한 것이다. 본 발명에 따른 지질-광감작제 나노결합체는 피부 투과성이 우수하여 진피층에 존재하는 균의 사멸률을 높일 수 있고, 균이 분비하는 분해효소인 리파아제에 의해 지질-광감작제 나노결합체가 분해되어 무좀균, 여드름균을 포함하는 효소를 분비하는 미생물이 존재하는 부위에서 특이적으로 균을 사멸시킬 수 있다. 또한, 광역학 치료법으로 치료함으로써 기존의 항진균제를 장기간 복용할 시 일어날 수 있는 간독성 등의 부작용의 위험을 낮추며, 항생제 내성균 발생 위험 역시 낮출 수 있어, 무좀, 여드름 치료를 비롯한 효소를 분비하는 미생물에 의해 발생하는 질환의 예방 또는 치료에 유용하게 사용될 수 있다.
Abstract:
본발명은지질-광감작제나노결합체및 이의제조방법에관한것으로, 더욱상세하게는지질리포좀내부에광감작제가봉입되거나, 지질리포좀외부에광감작제가결합되어구성되며, 지질과광감작제를연결하는연결자는미생물이분비하는효소에의하여특이적으로분해되는것을특징으로하는지질-광감작제나노결합체및 이의제조방법에관한것이다. 본발명에따른지질-광감작제나노결합체는피부투과성이우수하여진피층에존재하는균의사멸률을높일수 있고, 균이분비하는분해효소인리파아제에의해지질-광감작제나노결합체가분해되어무좀균, 여드름균을포함하는효소를분비하는미생물이존재하는부위에서특이적으로균을사멸시킬수 있다. 또한, 광역학치료법으로치료함으로써기존의항진균제를장기간복용할시 일어날수 있는간독성등의부작용의위험을낮추며, 항생제내성균발생위험역시낮출수 있어, 무좀, 여드름치료를비롯한효소를분비하는미생물에의해발생하는질환의예방또는치료에유용하게사용될수 있다.