Document Detail


Injectable PLGA porous beads cellularized by hAFSCs for cellular cardiomyoplasty.
MedLine Citation:
PMID:  22386922     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Cellular cardiomyoplasty has been limited by poor graft retention after cell transplantation. To ensure good retention of the engrafted cells, a microfluidic device was used to fabricate spherical porous beads of poly(D,L-lactic-co-glycolic acid) as a platform for cell delivery. The beads thus obtained had a relatively uniform size, a highly porous structure, and a favorably interconnected interior architecture, to facilitate the transportation of oxygen and nutrients. These porous beads were loaded with human amniotic fluid stem cells (hAFSCs) to generate cellularized microscaffolds. Live/dead assay demonstrated that most of the cells in the porous constructs were viable. The hAFSCs that were grown in beads formed a complex three-dimensional organization with well-preserved extracellular matrices (ECM) according to their porous structure. Retention of the administered beads was clearly identified at the site of engraftment following an experimentally induced myocardial infarction in a rat model. The results of echocardiography, magnetic resonance imaging, and histological analyses suggest that the transplantation of hAFSC beads into an infarcted heart could effectively maintain its gross morphology, prevent successive ventricular expansion, and thereby improve the post-infarcted cardiac function. Immunofluorescent staining revealed that the microenvironment that was provided by the infarcted myocardium might offer cues for the induction of the engrafted hAFSCs into angiogenic and cardiomyogenic lineages. Our results demonstrate that the cellularized beads with endogenously secreted ECM were of sufficient physical size to be entrapped in the interstitial tissues following transplantation, thereby benefiting the infarcted heart.
Authors:
Chieh-Cheng Huang; Hao-Ji Wei; Yi-Chun Yeh; Jiun-Jie Wang; Wei-Wen Lin; Ting-Yin Lee; Shiaw-Min Hwang; Sung-Wook Choi; Younan Xia; Yen Chang; Hsing-Wen Sung
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-2
Journal Detail:
Title:  Biomaterials     Volume:  -     ISSN:  1878-5905     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-5     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 © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
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