Abstract:
본 발명은 분해속도 조절이 가능한 이온기를 갖는 온도 감응성 포스파젠계 고분자와 그의 용도 및 그의 생리 활성 물질 전달 재료로서의 용도에 관한 것이다. 본 발명의 포스파젠계 고분자는 온도변화에 따라서 솔-젤 거동을 보이는 온도감응성을 갖기 때문에, 체내에 주입시 체온에 의하여 젤을 형성하여 약물 등의 생리 활성 물질의 방출 제어가 용이하고, 약물 등과 이온결합, 공유결합, 배위결합 등의 화학결합이 가능한 관능기를 갖고 있어서 약물 등의 담지력이 우수하다. 또한 이온기의 종류에 따라 분해속도를 조절할 수 있기 때문에 약물의 특성에 따라 선택적으로 방출시간을 조절할 수 있으며, 생체적합성도 뛰어나서 약물 등의 생리 활성 물질 전달 재료로서 매우 유용하다.
Abstract:
A biodegradable and thermosensitive poly(organophosphazene) hydrogel is provided to be capable of forming a direct chemical bond or ionic bond with drugs, to release the drugs for a long time, and thus be useful as a delivery material for drugs. The phosphazene polymer represented by the following chemical formula 1 is prepared by the steps of: thermopolymerizing a phosphazene trimer to obtain a dichloro phosphazene linear polymer; reacting the dichloro phosphazene linear polymer with 0.01-1.9 equivalents of an amino acid ester or a salt thereof; reacting the product of the second step with 0-1.9 equivalents of amino acid, peptide, and depsipeptide ester, or a salt thereof; reacting the product of the third step with 0.01-1.9 equivalents of a substituent having a functional group of NH2(R6)(R7)(R8) or a salt thereof; and reacting the product of the fourth step with 0.01-1.19 equivalents of aminomethoxypolyethyleneglycol or a salt thereof.
Abstract:
PURPOSE: A degradable polyphosphazene polymer having the phase transition behavior with temperature and its preparation method are provided, whose phase transition temperature and degradation velocity are controlled easily. CONSTITUTION: The polyphosphazene polymer is represented by the formula 1, wherein X represents O or N; NHR is depsipeptide and represents ethyl-2-(O-glycyl)glycolate or ethyl-2-(O-glycyl)lactate; NHR' is amino acid ethylester and represents NHCH(CH2CH2COOC2H5)COOC2H5 or phenylalanine ethylester; NHR'' represents glycine ethylester or alanine ethylester; a, b, c, d, e and f represent the mol of copolymer and are 0-1.0 and the sum of a, b, c, d, e and f is 1.0; and n represents the degree of polymerization and is 100-1,000. The method comprises the steps of reacting polydichlorophoaphazene of the formula 3 with an alkali metal salt of methoxy poly(ethylene glycol) of the formula 4 or aminomethoxy poly(ethylene glycol) of the formula 5 by the molar ratio of 1 : 0.3-1.5; reacting the product with depsipeptide (H2NR) and NH2CH(CH2CH2COOC2H5)COOC2H5 or phenylalanine ethylester (H2NR') by the molar ratio of 1 : 0.1-2 in organic solvent; and reacting the product with glycine ethylester or alanine ethylester (H2NR'') to obtain the polyphosphazene polymer of the formula 1.
Abstract:
The present invention relates to a temperature-sensitive phosphazene based polymer containing a degradation-controllable ionic group, a use thereof, and a use thereof as a bioactive substance transfer material. The phosphazene based polymer of the present invention has a temperature sensitivity with a sol-gel change by the temperature change, and forms gel when the polymer is injected into the body by the body temperature for easily controlling the discharging of bioactive substances including drugs. The phosphazene based polymer has a functional group which is capable of chemically bonding including an ionic bond, a covalent bond, and a coordinate bond, and has excellent carrying power of the drugs. The degradation speed of the polymer can be controlled by the type of an ionic group for selectively controlling the discharging time by the properties of the drugs. The phosphazene based polymer has excellent biocompatibility to be used as a bioactive substance transfer material. [Reference numerals] (AA) Solution state(room temperature); (BB) Temperature is increased; (CC) Gel state(body temperature)
Abstract:
화학적 가교결합이 가능한 포스파젠계 고분자의 생체재료로서의 용도, 생리활성물질이 공유 결합되어 있는 화학적 가교결합이 가능한 포스파젠계 고분자 및 이의 생체재료로서의 용도, 및 그 제조 방법이 제공된다. 상기 화학적 가교결합은 자외선 조사, 및/또는 가교제, 및/또는 첨가제, 및/또는 효소 및/또는, 1종 이상 고분자의 혼합에 의한 것일 수 있다.
Abstract:
PURPOSE: A biodegradable and thermosensitive poly(phosphazene)-superparamagnetic nano-particle complex is provided to have sol-gel behavior, the temperature sensibility of sol-gel behavior according to temperature change, and to improve functionality and bio-compatibility according to the purpose of a bio material. CONSTITUTION: A biodegradable and thermosensitive poly(phosphazene)-superparamagnetic nano-particle complex comprises: a polymer which has sol-gel behavior according to temperature change; and superparamagnetic ferrite nanoparticles having a structure of chemical formula 2a: Fe^(3+,T)(Fe^(2+),Fe^(3+))^0 O_4^(2-) or chemical formula 2b: Fe^(3+,T)(Me^(2+), Fe^(3+))^0 O_4^2. In the chemical formulas, Me is a transition metal selected from the group consisting of Sc, Ti, V, Cr, Mn, Co, Ni, Cu or Zn. T is tetrahedral site, I is octahedral site, δ is 0-1, as conversion ratio.