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Journal of Nanomaterials
Volume 2014 (2014), Article ID 793052, 10 pages
http://dx.doi.org/10.1155/2014/793052
Research Article

The Promotion of Human Neural Stem Cells Adhesion Using Bioinspired Poly(norepinephrine) Nanoscale Coating

1Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea
2The Graduate School of Nanoscience and Technology, KAIST, Daejeon 305-701, Republic of Korea
3Department of Pediatrics, College of Medicine, Yonsei University, Seoul 120-749, Republic of Korea
4Department of Chemistry, The Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 University Road, Daejeon 305-701, Republic of Korea

Received 21 November 2013; Accepted 12 February 2014; Published 7 April 2014

Academic Editor: Jingxia Wang

Copyright © 2014 Minah Park et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The establishment of versatile biomaterial interfaces that can facilitate cellular adhesion is crucial for elucidating the cellular processes that occur on biomaterial surfaces. Furthermore, biomaterial interfaces can provide physical or chemical cues that are capable of stimulating cellular behaviors by regulating intracellular signaling cascades. Herein, a method of creating a biomimetic functional biointerface was introduced to enhance human neural stem cell (hNSC) adhesion. The hNSC-compatible biointerface was prepared by the oxidative polymerization of the neurotransmitter norepinephrine, which generates a nanoscale organic thin layer, termed poly(norepinephrine) (pNE). Due to its adhesive property, pNE resulted in an adherent layer on various substrates, and pNE-coated biointerfaces provided a highly favorable microenvironment for hNSCs, with no observed cytotoxicity. Only a 2-hour incubation of hNSCs was required to firmly attach the stem cells, regardless of the type of substrate. Importantly, the adhesive properties of pNE interfaces led to micropatterns of cellular attachment, thereby demonstrating the ability of the interface to organize the stem cells. This highly facile surface-modification method using a biomimetic pNE thin layer can be applied to a number of suitable materials that were previously not compatible with hNSC technology.