Document Detail


A PNIPAAm-based thermosensitive hydrogel containing SWCNTs for stem cell transplantation in myocardial repair.
MedLine Citation:
PMID:  24746964     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Poly (N-isopropylacrylamide) (PNIPAAm) hydrogel was a widely used carrier in therapeutic agent delivery. However, its bioactivities for encapsulated cells were not satisfactory. In the study, we aimed to determine whether modification with single-wall carbon nanotubes (SWCNTs) could improve the bioactivitis, especially supportive adhesion of PNIPAAm to encapsulated cells and favor their efficacy in myocardial repair. A thermosensitive SWCNTs-modified PNIPAAm hydrogel (PNIPAAm/SWCNTs) were prepared by incorporating the SWCNTs into base PNIPAAm hydrogel. The bioactivities of the resulted hydrogel to brown adipose-derived stem cells (BASCs) were evaluated and compared with the base PNIPAAm hydrpgel in vitro. Then, the PNIPAAm-containing hydrogel was used as carrier for imtromyocardial delivery of BASCs in rats with myocardial infarction. The efficacy of PNIPAAm/SWCNTs hydrogel in stem cell-based myocardial repair was systematically evaluated. In vitro study showed that the PNIPAAm/SWCNTs hydrogel demonstrated significantly higher bioactivities to encapsulated BASCs compared with onefold PNIPAAm hydrogel, including promoting cell adhesion and proliferation. When used as carrier for intramyocardial delivery of BASCs after myocardial infarction, the PNIPAAm/SWCNTs hydrogel significantly enhanced the engraftment of seeding cells in infarct myocardium and augmented their therapeutic efficacies in myocardial infarction (MI). The data provided a supportive evidence for the myocardial application of the SWCNTs-modified hydrogel and offered a new perspective in development or improvement of cardiac tissue engineering scaffold.
Authors:
Xia Li; Jin Zhou; Zhiqiang Liu; Jun Chen; Shuanghong Lü; Hongyu Sun; Junjie Li; Qiuxia Lin; Boguang Yang; Cuimi Duan; Malcolm Mengqiu Xing; Changyong Wang
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-4-17
Journal Detail:
Title:  Biomaterials     Volume:  -     ISSN:  1878-5905     ISO Abbreviation:  Biomaterials     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-4-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8100316     Medline TA:  Biomaterials     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier Ltd. All rights reserved.
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