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Published in: Cellulose 5/2022

25-08-2021 | Original Research

Surface-Carboxylated Nanocellulose-Based Bioadaptive Scaffolds for Cell Culture

Authors: Mayumi Hatakeyama, Takuya Kitaoka

Published in: Cellulose | Issue 5/2022

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Abstract

The extracellular matrix (ECM) is critical to cell attachment, proliferation, and differentiation; therefore, development of bioadaptive ECM-mimetic cell culture scaffolds is an active area of research in tissue engineering. Collagen (rigid nanofiber morphology) and hyaluronan (carboxy groups displayed in a regular manner) are typical ECM components found in vivo. In this work, we used wood-derived crystalline cellulose nanofibers (CNFs) to provide bioadaptive microenvironments for cell culture. Catalytic oxidation of wood CNFs using 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) afforded crystalline nanofibrous scaffolds with various carboxy contents, ranging from 0.31 to 1.60 mmol g–1, of the TEMPO-oxidized CNFs (TOCNFs). Mouse fibroblast cells were subjected to the hydrophilic TOCNF-coated substrates, which were transparent and exhibited a native cellulose I crystalline structure; good cell proliferation was observed for the TOCNFs with carboxy content of 0.8–1.0 mmol g–1, although intact CNF was bioinert and an excess of carboxylates negatively impacted cell growth. Neither mercerized TOCNFs with a cellulose II structure nor carboxymethylated CNFs with irregular surface carboxy groups contributed to cell proliferation. Therefore, the rigid nanofiber morphology of xeno-free, crystalline TOCNFs with regular alignment of surface carboxy groups would hold the key to providing bioadaptive, ECM-mimetic cellular microenvironments.

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Metadata
Title
Surface-Carboxylated Nanocellulose-Based Bioadaptive Scaffolds for Cell Culture
Authors
Mayumi Hatakeyama
Takuya Kitaoka
Publication date
25-08-2021
Publisher
Springer Netherlands
Published in
Cellulose / Issue 5/2022
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-021-04154-5