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Calcium phosphate coated core-shell protein nanocarriers: Robust stability, controlled release and enhanced anticancer activity for curcumin delivery

机译:磷酸钙涂覆的核 - 壳蛋白纳米载体:耐稳定性,控释和增强抗癌活性的姜黄素递送

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摘要

Composite protein and inorganic nanodelivery systems can realise a pH-responsive release and effectively improve the stability and anti-cancer proliferative activity of hydrophobic molecules. In this study, a novel core-shell structure of NaCas (Sodium Caseinate)@CaP (Calcium Phosphate) as a nanodelivery system with NaCas as the core for increasing solubility and CaP as the shell for enhanced stability was built. By using Cur (Curcumin) as a model bioactive molecule, (Cur@NaCas)@CaP nanoparticles (NPs) demonstrated a uniform size distribution of 150-200 nm with a distinct nano-composite structure. After exposure to 80 degrees C for 2 h, the NaCas@CaP loaded Cur still retained 80% stability while under the same conditions only 12% of free Cur remained intact. UV-light stability was remarkably enhanced 8.56 fold by the protection of the core-shell structure. More importantly, pH-responsive release was achieved owing to the CaP surface coating. The encapsulated Cur by NaCas@CaP NPs exhibited an enhanced cellular anti-oxidant activity (CAA) based on MGC-803 cell monolayer models. The confocal laser-scanning microscopy (CLSM) images and cancer-cell-proliferation assay illustrated that (Cur@ NaCas)@CaP NPs showed significantly improvements of cellular uptake and anti-cancer activity against A549 cancer cells than free Cur. These novels core-shell NaCas@CaP NPs are very promising for intensifying the stability and bioactivity of hydrophobic compounds in drug delivery and cancer treatment.
机译:复合蛋白和无机纳米型系统可以实现pH-响应释放,有效地改善疏水分子的稳定性和抗癌性增殖活性。在该研究中,为具有NaCAS的纳米次碳酸钠(磷酸钙)的NACAS(磷酸钙)的新核 - 壳结构作为纳米纳米作为壳体的核心,建立了用于增强稳定性的壳体。通过使用Cur(姜黄素)作为模型生物活性分子,(Cur @ NaCl)@cap纳米颗粒(NPS)证明了150-200nm的均匀尺寸分布,具有不同的纳米复合结构。在暴露于80℃的2小时后,Nacas @帽加载的Cur仍然保留了80%的稳定性,而在相同的条件下,只有12%的自由Cur仍然完好无损。通过保护芯壳结构,UV光稳定性显着增强了8.56倍。更重要的是,由于帽表面涂层,实现了pH-响应释放。 NACAS @帽NPS的包封的CUP表现出基于MGC-803细胞单层模型的增强的细胞抗氧化活性(CAA)。共聚焦激光扫描显微镜(CLSM)图像和癌细胞增殖测定显示(Cur @ NaCl)@cap nps表明,对A549癌细胞的细胞摄取和抗癌活性显着改善,而不是自由Cur。这些小型核心壳Nacas @帽NPS非常有希望加强疏水化合物在药物递送和癌症治疗中的稳定性和生物活性。

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