Doraiswamy Anand, Ovsianikov Aleksandr, Gittard Shaun D, Monteiro-Riviere Nancy A, Crombez Rene, Montalvo Eva, Shen Weidian, Chichkov Boris N, Narayan Roger J
Joint Department of Biomedical Engineering, North Carolina State University, Raleigh 27695, USA.
J Nanosci Nanotechnol. 2010 Oct;10(10):6305-12. doi: 10.1166/jnn.2010.2636.
Microneedle devices for transdermal delivery of nanoscale pharmacologic agents were fabricated out of organically-modified ceramic (Ormocer) materials using two photon polymerization. Out-of-plane hollow microneedle arrays with various aspect ratios were fabricated using this rapid prototyping process. Human epidermal keratinocyte (HEK) viability on Ormocer surfaces fabricated using two photon polymerization was similar to that on control surfaces. Nanoindentation studies were performed to determine hardness and Young's modulus values for Ormocer materials. Microneedies were shown to enable more rapid distribution of the PEG-amine quantum dot solution to the deep epidermis and dermis layers of porcine skin than topical administration. Our results suggest that two photon polymerization may be used to create microneedle arrays for transdermal delivery of nanoscale pharmacologic agents.
采用双光子聚合技术,以有机改性陶瓷(Ormocer)材料制备了用于经皮递送纳米级药物制剂的微针装置。利用这种快速成型工艺制造了具有不同纵横比的平面外空心微针阵列。在通过双光子聚合制备的Ormocer表面上,人表皮角质形成细胞(HEK)的活力与对照表面上的相似。进行了纳米压痕研究以确定Ormocer材料的硬度和杨氏模量值。结果表明,与局部给药相比,微针能够使聚乙二醇胺量子点溶液更快地分布到猪皮肤的深层表皮和真皮层。我们的结果表明,双光子聚合可用于制造用于经皮递送纳米级药物制剂的微针阵列。