NDLI: Using surfaces to modulate the morphology and structure of attached cells – a case of cancer cells on chitosan membranes

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Using surfaces to modulate the morphology and structure of attached cells – a case of cancer cells on chitosan membranes

Content Provider	Royal Society of Chemistry (RSC)
Author	Liao, Tzu-Chun Harn, Hans I-Chen Cheng, Chao-Min Yang, Chung-Yao York, Roger L. Yeh, J. Andrew Chen, Wen-Shiang Shuai, Hung-Hsun
Copyright Year	2013
Abstract	This paper describes the development of physically and/or chemically modified chitosan membranes to probe cellular behaviors and molecular-level structural responses of NIH-3T3 fibroblasts (normal cells) and Ha-ras-transformed cells (abnormal cells) adhered onto these modified membranes. To prepare chitosan membranes with nanometrically scaled physical features, we have demonstrated an inexpensive and easy-to-handle method that could be easily integrated with IC-based manufacturing processes with mass production potential. These physically or chemically modified chitosan membranes were examined via scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and water contact angle measurement, in order to gain a better understanding of chitosan membrane surface characteristics including surface morphology, stiffness, functional groups, and surface hydrophobicity/hydrophilicity. NIH-3T3 fibroblasts and their Ha-ras-transformed progeny were cultured on these modified chitosan membranes. After 12, 24 and 48 h of culture, these cells were investigated to decipher cellular behaviors. We found that NIH-3T3 fibroblasts and their Ha-ras-transformed progeny exhibited distinct structurally based responses attributable to chitosan membrane surface chemical or physical properties that we demonstrate as possibly applicable, for drug screening applications. Secondarily, but crucially to this study, we developed a chitosan-based micropatterning procedure that allowed us to re-arrange mammalian cells (i.e., HeLa cells in this study, for cancer drug screening) at the desired locations (with a single-cell array format). This procedure was based on cell affinity to different surface topographies of chitosan membranes that we prepared. This cell-based patterning approach has the potential for use in a wide range of applications including use as a promising platform for drug discovery, cytotoxicity studies, functional genomics, and investigations of cellular microenvironment. We believe that this study would provide further understanding of naturally derived biomaterials, lay the foundation for broadening the applications of chitosan, and facilitate the development of new biomedical devices (i.e., artificial stents, implantable artificial tissues, and sustainable implantable biosensors) with unique cell–material interface properties and characteristics, such as in vitro cell culture and diagnostic platforms.
Starting Page	3058
Ending Page	3067
Page Count	10
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	4
Issue Number	8
Journal	Chemical Science
DOI	10.1039/c3sc50533b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cell culture 3T3 cells Cytotoxicity Photoemission spectroscopy Hydrophobe Scanning electron microscope Water contact HeLa Micropatterning Atomic-force microscopy Stiffness Biomaterial Chitosan Hydrophile Drug discovery X-ray photoelectron spectroscopy Functional genomics Cancer
Content Type	Text
Resource Type	Article
Subject	Chemistry

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Using surfaces to modulate the morphology and structure of attached cells – a case of cancer cells on chitosan membranes

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Using surfaces to modulate the morphology and structure of attached cells – a case of cancer cells on chitosan membranes

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