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Design and characterization of pH stimuli-responsive nanofiber drug delivery system: The promising targeted carriers for tumor therapy

机译:pH刺激响应纳米纤维药物递送系统的设计与表征:肿瘤治疗的有前途的靶向载体

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New carrier platforms have been designed for an electrospun pyridinium calixarene nanofiber for controlled drug delivery. First, 5,11,17,23-tetra-tert-butyl-25,27-bis(3-aminomethyl-pyridineamido)-26,28-dihydroxycalix[4]arene (3-AMP) scaffold was produced by electrospinning. AMP scaffold was modified by human serum albumin (HSA), folic acid (FA), and glutathione (GSH). Doxorubicin (DOX) was loaded to surfaces of the AMP, AMP-HSA, AMP-HSA-FA, and AMP-HSA-GSH nanofibers by using DOX solution in different buffers with, 2.2, 4.0, 6.0, and 7.4 pH. The release studies DOX from four different nanofibers was also done in a various amount microenviroments by changing pH values. The loading and release amount of DOX was estimated from the calibration curve drawn at 480 and 560 nm of excitation and emission wavelengths by using a fluorescence spectrophotometer. The loading studies were confirmed by Fourier transforms infrared, atomic force microscopy, transmission electron microscopy, scanning electron microscope, and energy-dispersive X-ray (EDX) analysis.
机译:新的载体平台已被设计用于控制药物输送的电纺吡啶-杯芳烃纳米纤维。首先,通过静电纺丝制备5,11,17,23-四叔丁基-25,27-二(3-氨基甲基-吡啶酰胺基)-26,28-二羟基杯[4]芳烃(3-AMP)支架。AMP支架由人血清白蛋白(HSA)、叶酸(FA)和谷胱甘肽(GSH)修饰。通过在pH值为2.2、4.0、6.0和7.4的不同缓冲液中使用DOX溶液,将阿霉素(DOX)加载到AMP、AMP-HSA、AMP-HSA-FA和AMP-HSA-GSH纳米纤维的表面。通过改变pH值,在不同数量的微环境中也对四种不同纳米纤维的DOX进行释放研究。通过使用荧光分光光度计在480和560 nm激发和发射波长下绘制的校准曲线,估计DOX的负载量和释放量。载荷研究通过傅里叶变换红外、原子力显微镜、透射电子显微镜、扫描电子显微镜和能量色散X射线(EDX)分析得到证实。

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