Document Detail

Cells behave distinctly within sponges and hydrogels due to differences of internal structure.
MedLine Citation:
PMID:  23614637     Owner:  NLM     Status:  MEDLINE    
Different forms of biomaterials, including microspheres, sponges, hydrogels, and nanofibers, have been broadly used in cartilage regeneration; however, effects of internal structures of the biomaterials on cells and chondrogenesis remain largely unexplored. We hypothesized that different internal structures of sponges and hydrogels led to phenotypic disparity of the cells and may lead to disparate chondrogenesis. In the current study, the chondrocytes in sponges and hydrogels of chitosan were compared with regard to cell distribution, morphology, gene expression, and production of extracellular matrix. The chondrocytes clustered or attached to the materials with spindle morphologies in the sponges, while they distributed evenly with spherical morphologies in the hydrogels. The chondrocytes proliferated faster with elevated gene expression of collagen type I and down-regulated gene expression of aggracan in sponges, when compared with those in the hydrogels. However, there was no significant difference of the expression of collagen type II between these two scaffolds. Excretion of both glycosaminoglycan (GAG) and collagen type II increased with time in vitro, but there was no significant difference between the sponges and the hydrogels. There was no significant difference in secretion of GAG and collagen type II in the two scaffolds, while the levels of collagen type I and collagen type X were much higher in sponges compared with those in hydrogels during an in vivo study. Though the chondrocytes displayed different phenotypes in the sponges and hydrogels, they led to comparable chondrogenesis. An optimized design of the biomaterials could further improve chondrogenesis through enhancing functionalities of the chondrocytes.
Jingjing Zhang; Zheng Yang; Chao Li; Yana Dou; Yijiang Li; Tanushree Thote; Dong-an Wang; Zigang Ge
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2013-06-08
Journal Detail:
Title:  Tissue engineering. Part A     Volume:  19     ISSN:  1937-335X     ISO Abbreviation:  Tissue Eng Part A     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-09-06     Completed Date:  2014-05-02     Revised Date:  2014-10-09    
Medline Journal Info:
Nlm Unique ID:  101466659     Medline TA:  Tissue Eng Part A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2166-75     Citation Subset:  IM    
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MeSH Terms
Cells, Cultured
Chondrocytes / cytology*,  physiology
Hydrogels / chemistry*
Porifera / chemistry*
Real-Time Polymerase Chain Reaction
Tissue Engineering / methods
Tissue Scaffolds / chemistry
Reg. No./Substance:

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