Document Detail

Shear stress-dependent cell detachment from temperature-responsive cell culture surfaces in a microfluidic device.
MedLine Citation:
PMID:  22818649     Owner:  NLM     Status:  MEDLINE    
A new approach to quantitatively estimate the interaction between cells and material has been proposed by using a microfluidic system, which was made of poly(dimethylsiloxane) (PDMS) chip bonding on a temperature-responsive cell culture surface consisted of poly(N-isopropylacrylamide) (PIPAAm) grafted tissue culture polystyrene (TCPS) (PIPAAm-TCPS) having five parallel test channels for cell culture. This construction allows concurrently generating five different shear forces to apply to cells in individual microchannels having various resistance of each channel and simultaneously gives an identical cell incubation condition to all test channels. NIH/3T3 mouse fibroblast cells (MFCs) and bovine aortic endothelial cells (BAECs) were well adhered and spread on all channels of PIPAAm-TCPS at 37 °C. In our previous study, reducing culture temperature below the lower critical solution temperature (LCST) of PIPAAm (32 °C), cells detach themselves from hydrated PIPAAm grafted surfaces spontaneously. In this study, cell detachment process from hydrated PIPAAm-TCPS was promoted by shear forces applied to cells in microchannels. Shear stress-dependent cell detachment process from PIPAAm-TCPS was evaluated at various shear stresses. Either MFCs or BAECs in the microchannel with the strongest shear stress were found to be detached from the substrate more quickly than those in other microchannels. A cell transformation rate constant C(t) and an intrinsic cell detachment rate constant k(0) were obtained through studying the effect of shear stress on cell detachment with a peeling model. The proposed device and quantitative analysis could be used to assess the possible interaction between cells and PIPAAm layer with a potential application to design a cell sheet culture surface for tissue engineering.
Zhonglan Tang; Yoshikatsu Akiyama; Kazuyoshi Itoga; Jun Kobayashi; Masayuki Yamato; Teruo Okano
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-07-20
Journal Detail:
Title:  Biomaterials     Volume:  33     ISSN:  1878-5905     ISO Abbreviation:  Biomaterials     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-08-13     Completed Date:  2012-12-18     Revised Date:  2014-01-22    
Medline Journal Info:
Nlm Unique ID:  8100316     Medline TA:  Biomaterials     Country:  England    
Other Details:
Languages:  eng     Pagination:  7405-11     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
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MeSH Terms
Acrylamides / pharmacology
Cell Adhesion / drug effects
Cell Culture Techniques / instrumentation*
Endothelial Cells / cytology*,  drug effects,  metabolism
Fibroblasts / cytology*,  drug effects,  metabolism
Microfluidic Analytical Techniques / instrumentation*,  methods*
NIH 3T3 Cells
Polymers / pharmacology
Rheology / drug effects
Stress, Mechanical*
Surface Properties
Time Factors
Reg. No./Substance:
0/Acrylamides; 0/Polymers; 25189-55-3/poly-N-isopropylacrylamide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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