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Smart electrospun fibrous scaffolds inhibit tumor cells and promote normal cell proliferation

机译:智能电纺纤维支架抑制肿瘤细胞并促进正常细胞增殖

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摘要

A smart and stable electrospun fibrous drug carrier was fabricated to release an incorporated drug in response to the local presence of acid and to provide a favourable micro-environment for tissue regeneration. To fabricate the electrospun fibrous scaffolds responsive to the local pH variation, sodium bicarbonate, a component of acid response, was facilely incorporated into drug-loaded electrospun fibers by co-electrospinning. The analysis of X-ray photoelectron spectroscopy, Fourier-transform infrared spectrometry, X-ray diffraction, Differential scanning calorimetry and water contact angles demonstrated that the sodium bicarbonate was successfully incorporated into the electrospun fibers. The in vitro drug release results showed that the release rate of an anti-cancer drug 5-fluorouracil in an acidic environment from the electrospun fibrous scaffolds was proportional to the concentration of sodium bicarbonate, and the structure of the electrospun fibrous scaffolds was well maintained before and after the drug release. The acid-responsive release of 5-fluorouracil for a short time was found to effectively inhibit osteosarcoma cell growth, and the electrospun fibrous scaffolds with long-term stability supported fibroblast adhesion and proliferation, indicating the potential for subsequent tissue regeneration.
机译:制造了一种智能且稳定的电纺纤维药物载体,以响应于酸的局部存在而释放出掺入的药物,并为组织再生提供了良好的微环境。为了制造响应于局部pH变化的电纺纤维支架,通过共电纺丝将碳酸氢钠(酸反应的成分)容易地掺入负载有药物的电纺纤维中。 X射线光电子能谱,傅立叶变换红外光谱,X射线衍射,差示扫描量热法和水接触角的分析表明,碳酸氢钠已成功地掺入到电纺纤维中。体外药物释放结果表明,在酸性环境中,抗静电药物5-氟尿嘧啶从电纺纤维支架上的释放速率与碳酸氢钠的浓度成正比,并且在保持之前电纺纤维支架的结构得到了很好的维持。以及药物释放后。发现5-氟尿嘧啶在短时间内酸响应释放可有效抑制骨肉瘤细胞生长,具有长期稳定性的电纺纤维支架可支持成纤维细胞粘附和增殖,表明随后组织再生的潜力。

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