Int J Nanomed:LL37负载的二氧化钛纳米孔的抗菌和成骨性能

2019-05-24 不详 网络

许多研究表明纳米管(NT)的大小可以显著影响成骨细胞在钛基材料上的行为。但NT与基材之间的弱结合强度极大地限制了其应用。本研究旨在比较NT和纳米孔(NP)涂层的稳定性,并通过在NP结构中加载LL37肽进一步制备抗菌钛基材料。使用划痕试验机研究NT和NP层的粘合强度。通过CCK8,碱性磷酸酶活性,矿化和聚合酶链反应测定在体外评估MC3T3-E1细胞在不同底物上的增殖和分化。NP和NP/LL37的抗菌

许多研究表明纳米管(NT)的大小可以显著影响成骨细胞在钛基材料上的行为。但NT与基材之间的弱结合强度极大地限制了其应用。本研究旨在比较NT和纳米孔(NP)涂层的稳定性,并通过在NP结构中加载LL37肽进一步制备抗菌钛基材料。

使用划痕试验机研究NT和NP层的粘合强度。通过CCK8,碱性磷酸酶活性,矿化和聚合酶链反应测定在体外评估MC3T3-E1细胞在不同底物上的增殖和分化。NP和NP/LL37的抗菌率也通过涂板法测量。此外,使用未感染感染的模型进一步评估体内NP和NP/LL37周围的成骨作用。

划痕试验证明NP层由于其连续的孔结构和比独立的NT结构更厚的管壁具有更强的与基底的结合强度。在体外,细胞结果显示NP基质上的MC3T3-E1细胞具有比NT组更好的早期粘附、扩散和成骨分化。此外,基于多孔材料的药物储库特征,NP底物也用于加载抗菌LL37肽。加载LL37后,NP的抗菌和成骨诱导能力得到进一步提高,从而明显促进未感染和感染模型的成骨。

总之,该研究结果表明,NP层具有比NT结构更强的结合强度,相应的NP材料可能比NT更适合制备用于骨损伤治疗的药物结合钛种植体。

原始出处:

Shen X, Al-Baadani MA, et al., Antibacterial and osteogenesis performances of LL37-loaded titania nanopores in vitro and in vivo. Int J Nanomedicine. 2019 Apr 30;14:3043-3054. doi: 10.2147/IJN.S198583. eCollection 2019.

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    2019-07-10 axin009
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    2019-07-20 30397613
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    2019-05-26 zhaojie88
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