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A polyphenolic biomacromolecule prepared from a flavonoid: Catechin as degradable microparticles

机译:由黄酮类化合物制备的多酚生物重量:儿茶素作为可降解的微粒

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Catechin (CAT) was crosslinked with trimethylolpropane triglycidyl ether (TMPTGE) to obtain degradable poly(CAT) particles in a single step. Spherical p(CAT) particles with tens of micrometer size range and an isoelectronic point at pH 1.2 were obtained. The hydrolytic degradation of p(CAT) particles provided sustainable and extended release with 264 mg/g CAT release within 10 days at pH 7.4. The antioxidant capacity of 55.0 +/- 0.9 mu g/ml gallic acid equivalent in terms of total phenol content, and 0.88 +/- 0.3 mu mol/g trolox equivalent were estimated for p(CAT) particles displaying strong radical scavenging capability. Blood clotting and hemolysis assays demonstrated dose-dependent blood compatibility revealing higher blood compatibility for p(CAT) particles up to 10 mu g/ml concentration. The cytotoxicity results show that p(CAT) particles have almost no toxicity for CCD841 normal colon cells at 250 mu g/ml concentration in 24 h incubation time giving similar to 97% cell viability, whereas CAT molecules only provide similar to 34% cell viability.
机译:将儿茶素(CAT)与三羟甲基丙烷三缩水甘油醚(TMPTGE)交联,一步获得可降解聚(CAT)颗粒。在ph1.2的条件下,得到了具有几十微米尺寸范围和等电子点的球形p(CAT)粒子。p(CAT)颗粒的水解降解提供了可持续和延长的释放,在pH 7.4下,10天内释放264 mg/g CAT。对于具有较强自由基清除能力的p(CAT)颗粒,其抗氧化能力估计为55.0+/-0.9μg/ml没食子酸当量(总酚含量),以及0.88+/-0.3μmol/g特罗洛克斯当量。血液凝固和溶血试验证明了剂量依赖性血液相容性,表明高达10μg/ml浓度的p(CAT)颗粒具有更高的血液相容性。细胞毒性试验结果表明,在250μg/ml浓度下,p(CAT)颗粒在24小时培养时间内对CCD841正常结肠细胞几乎没有毒性,使细胞存活率接近97%,而CAT分子仅使细胞存活率接近34%。

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