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:: Volume 20, Issue 5 (3-2013) ::
Journal of Ilam University of Medical Sciences 2013, 20(5): 207-215 Back to browse issues page
Smart Hydrogel designed PNIPAm / chitosan by Gamma Irradiation of Biological applications
S Haydari kashl , E Bi azar * 1, A Karimi , A Asef nejad , A Amir khani , M Shahriari nour , F Kazem begi
1- , kia_esm@yahoo.com
Abstract:   (13961 Views)
The abrupt conformational matrix, in which PNIPAM or its modified forms transition of it upon changes at temperatures, may be embedded. It is expected that the change around 32´C has stirred up explorations for in temperature may induce the conformational technological applications. Methods & Materials: Thermo-sensitive hydrogels were prepared by graft copolymerization of chitosan and N-Isopropylacrylamide via gamma radiation. Characterization of hydrogels such as 13C-NMR, DSC analysis and swelling test and cell assessments for harvesting living cell sheet were investigated. 13C-NMR and DSC analysis showed chitosan and NIPAAm monomer were grafted via gamma radiation successfully. Findings: Swelling ratio and curves results administrated hydrophilicity / hydrophobicity of hydrogel that this property is due to presence of PNIPAAm in different temperatures. The hydrogel was tested for harvesting epithelial cells after carrying out cell culture at 37 °C and incubating the confluent cells at 4°C for spontaneous detachment of cell sheet from hydrogel surface without enzyme treatment. Discussion & Conclusion: Cell viability assay results and microscopic observations demonstrated that cells could attach to the hydrogel surface and maintain high viability and proliferation ability. Cell detachment efficiency from the hydrogel was high. These unique properties of the hydrogel would make it a promising support for epithelial cell grafting especially cornea regeneration.
Keywords: Tissue engineering, intelegent polymer temperature response, chitosan, poly N-Isopropylacrylamide
Full-Text [PDF 459 kb]   (3887 Downloads)    
Type of Study: Research | Subject: Medical microbiology
Received: 2013/03/18 | Accepted: 2013/06/16 | Published: 2013/06/16
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haydari kashl S, bi azar E, karimi A, asef nejad A, amir khani A, shahriari nour M et al . Smart Hydrogel designed PNIPAm / chitosan by Gamma Irradiation of Biological applications. J. Ilam Uni. Med. Sci. 2013; 20 (5) :207-215
URL: http://sjimu.medilam.ac.ir/article-1-945-en.html

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Volume 20, Issue 5 (3-2013) Back to browse issues page
مجله دانشگاه علوم پزشکی ایلام Journal of Ilam University of Medical Sciences
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