Clin Oral Investig:唾液对纳米微粒命运的影响

2017-07-12 MedSci MedSci原创

应用于被覆粘膜局部给药纳米载体的设计需要全面掌握纳米材料(NPs)是如何与唾液相互作用的。由于NPs大小或相互作用而导致过滤性受到影响或吸附到细胞表面,NPs与唾液间的这种接触决定了NPs是否会凝聚成团和失去可移动性,以及是否会被上皮细胞所内化。这篇研究的目的是在基于NPs物化特性的条件下评估其在唾液中的性态。

应用于被覆粘膜局部给药纳米载体的设计需要全面掌握纳米材料(NPs)是如何与唾液相互作用的。由于NPs大小或相互作用而导致过滤性受到影响或吸附到细胞表面,NPs与唾液间的这种接触决定了NPs是否会凝聚成团和失去可移动性,以及是否会被上皮细胞所内化。这篇研究的目的是在基于NPs物化特性的条件下评估其在唾液中的性态。

研究首先确定唾液的孔径分布情况,并且通过光镊分析孔洞中液体的粘度。不同功能化的NPs (20和200 nm)分散至唾液和唾液缓冲液中,观察其特性,并且通过1D电泳和免疫印迹法检测表面结合蛋白MUC5B和MUC7的表达变化。同时,记录NP的可流动性并通过TR146细胞进行细胞摄取实验。

唾液筛孔直径为0.7 μm,最宽为1.9 μm,并且结果显示,筛孔中充满了低粘度的液体。NPs的理化性质会影响胶体的稳定性和移动性:与未功能化的微粒(未凝聚成团,并且细胞摄取率为2.8%)相比较,功能化的微粒较为固定,研究认为这与凝聚以及粘蛋白结合增多有关。

结论:这篇研究表明,唾液的显微结构推进NP的吸附。然而,NP的大小以及表面功能化决定了其胶体的稳定性以及与细胞的相互作用。

临床意义:全面掌握NPs与唾液间的相互作用能够改善炎症性口腔疾病的治疗策略。

原始出处

Teubl BJ, Stojkovic B, et al. The effect of saliva on the fate of nanoparticles. Clin Oral Investig. 2017 Jul 9. doi: 10.1007/s00784-017-2172-5.

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    2018-05-28 小几洁
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    2017-07-13 130****4638

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    2017-07-12 dhzzm

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