Journal
JOURNAL OF NANOBIOTECHNOLOGY
Volume 20, Issue 1, Pages -Publisher
BMC
DOI: 10.1186/s12951-022-01340-w
Keywords
Inverse opal; Conductive; Anisotropic; Nerve orientation; Hydrogel
Funding
- National Key Research and Development Program of China [2020YFA0908200]
- National Natural Science Foundation of China [52073060, 61927805, 82102511]
- Natural Science Foundation of Jiangsu [BK20210021]
- Jiangsu science and technology project [BK20190353]
- Shenzhen Fundamental Research Program [JCYJ20190813152616459, JCYJ20210324133214038]
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In this study, a conductive and anisotropic inverse opal film was developed for nerve orientation induction. The film allowed nerve cells to grow along the stretching direction, forming a neural network and promoting the connection of nerve cells. Additionally, the film exhibited conductive properties, making it a suitable material for neurite growth and differentiation.
Background: The nervous system is critical to the operation of various organs and systems, while novel methods with designable neural induction remain to exploit. Results: Here, we present a conductive inverse opal film with anisotropic elliptical porous patterns for nerve orientation induction. The films are fabricated based on polystyrene (PS) inverse opal scaffolds with periodical elliptical porous structure and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) mixed polyacrylamide (PAAm) polymers fillers. It is demonstrated that the anisotropic elliptical surface topography allows the nerve cells to be induced into orientation connected with the stretching direction. Because of the anisotropic features of the film which can be stretched into different directions, nerve cells can be induced to grow in one or two directions, forming a neural network and promoting the connection of nerve cells. It is worth mentioning that the PEDOT:PSS-doped PAAm hydrogels endow the film with conductive properties, which makes the composite films be a suitable candidate for neurites growth and differentiation. Conclusions: All these features of the conductive and anisotropic inverse opal films imply their great prospects in biomedical applications.
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