A Simple and Efficient Method to Improve Mechanical Properties of Collagen Scaffolds by UV Irradiation
Collagen is the major protein component of cartilage, bone, skin and connective tissue and constitutes the major part of the extracellular matrix. Collagen type I has complex structural hierarchy, which consists of treepolypeptide α-chains wound together in a rod-like helical structure. Collagen is...
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Iran Polymer and Petrochemical Institute
2010-12-01
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| Series: | علوم و تکنولوژی پلیمر |
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| Online Access: | http://jips.ippi.ac.ir/article_675_c385a4d4a4f0e56def24551d921d2fd2.pdf |
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| author | F. Khayyatan Sh. Hojjati Emami N. Zare Mehrjerdi H. Baharvand |
| author_facet | F. Khayyatan Sh. Hojjati Emami N. Zare Mehrjerdi H. Baharvand |
| author_sort | F. Khayyatan |
| collection | DOAJ |
| description | Collagen is the major protein component of cartilage, bone, skin and connective tissue and constitutes the major part of the extracellular matrix. Collagen type I has complex structural hierarchy, which consists of treepolypeptide α-chains wound together in a rod-like helical structure. Collagen is an important biomaterial, finding many applications in the field of tissue engineering. It has been processed into various shapes, such as, gel, film, sponge and fiber. It is commonly used as the scaffolding material for tissue engineering due to its many superior properties including low antigenicity and high growth promotion. Unfortunately, poor mechanical properties and rapid degradation rates of collagen scaffolds can cause instability and difficulty in handling. By crosslinking, the structural stability of the collagen and its rate of resorption can be adapted with respect to its demanding requirements. The strength, resorption rate, and biocompatibility of collagenous biomaterials are profoundly influenced by the method and extent of crosslinking. In thisstudy, the effect of UV irradiation on collagen scaffolds has been carried out.Collagen scaffolds were fabricated using freeze drying method with freezing temperature of -80oC, then exposed to UV irradiation. Mean pore size of the scaffolds was obtained as 98.52±14.51 μm using scanning electron microscopy. Collagen scaffolds exposed to UV Irradiation (254 nm) for 15 min showed the highest tensile strain (17.37±0.98 %), modulus (1.67±0.15 MPa) and maximum load (24.47±2.38 cN) values. As partial loss of the native collagen structure may influence attachment, migration, and proliferation of cells on collagen scaffolds, we detected no intact α-chains after SDS-Page chromatography. We demonstrate that UV irradiation is a rapid and easily controlled means of increasing the mechanical strength of collagen scaffolds without any molecular fracture. |
| first_indexed | 2024-12-17T23:30:27Z |
| format | Article |
| id | doaj.art-fe79650156f64379a30e1c843c085dab |
| institution | Directory Open Access Journal |
| issn | 1016-3255 2008-0883 |
| language | fas |
| last_indexed | 2024-12-17T23:30:27Z |
| publishDate | 2010-12-01 |
| publisher | Iran Polymer and Petrochemical Institute |
| record_format | Article |
| series | علوم و تکنولوژی پلیمر |
| spelling | doaj.art-fe79650156f64379a30e1c843c085dab2022-12-21T21:28:40ZfasIran Polymer and Petrochemical Instituteعلوم و تکنولوژی پلیمر1016-32552008-08832010-12-0123537137810.22063/jipst.2010.675675A Simple and Efficient Method to Improve Mechanical Properties of Collagen Scaffolds by UV IrradiationF. KhayyatanSh. Hojjati EmamiN. Zare MehrjerdiH. BaharvandCollagen is the major protein component of cartilage, bone, skin and connective tissue and constitutes the major part of the extracellular matrix. Collagen type I has complex structural hierarchy, which consists of treepolypeptide α-chains wound together in a rod-like helical structure. Collagen is an important biomaterial, finding many applications in the field of tissue engineering. It has been processed into various shapes, such as, gel, film, sponge and fiber. It is commonly used as the scaffolding material for tissue engineering due to its many superior properties including low antigenicity and high growth promotion. Unfortunately, poor mechanical properties and rapid degradation rates of collagen scaffolds can cause instability and difficulty in handling. By crosslinking, the structural stability of the collagen and its rate of resorption can be adapted with respect to its demanding requirements. The strength, resorption rate, and biocompatibility of collagenous biomaterials are profoundly influenced by the method and extent of crosslinking. In thisstudy, the effect of UV irradiation on collagen scaffolds has been carried out.Collagen scaffolds were fabricated using freeze drying method with freezing temperature of -80oC, then exposed to UV irradiation. Mean pore size of the scaffolds was obtained as 98.52±14.51 μm using scanning electron microscopy. Collagen scaffolds exposed to UV Irradiation (254 nm) for 15 min showed the highest tensile strain (17.37±0.98 %), modulus (1.67±0.15 MPa) and maximum load (24.47±2.38 cN) values. As partial loss of the native collagen structure may influence attachment, migration, and proliferation of cells on collagen scaffolds, we detected no intact α-chains after SDS-Page chromatography. We demonstrate that UV irradiation is a rapid and easily controlled means of increasing the mechanical strength of collagen scaffolds without any molecular fracture.http://jips.ippi.ac.ir/article_675_c385a4d4a4f0e56def24551d921d2fd2.pdftissue engineeringcollagen scaffolduv irradiationphysical crosslinkingmechanical properties |
| spellingShingle | F. Khayyatan Sh. Hojjati Emami N. Zare Mehrjerdi H. Baharvand A Simple and Efficient Method to Improve Mechanical Properties of Collagen Scaffolds by UV Irradiation علوم و تکنولوژی پلیمر tissue engineering collagen scaffold uv irradiation physical crosslinking mechanical properties |
| title | A Simple and Efficient Method to Improve Mechanical Properties of Collagen Scaffolds by UV Irradiation |
| title_full | A Simple and Efficient Method to Improve Mechanical Properties of Collagen Scaffolds by UV Irradiation |
| title_fullStr | A Simple and Efficient Method to Improve Mechanical Properties of Collagen Scaffolds by UV Irradiation |
| title_full_unstemmed | A Simple and Efficient Method to Improve Mechanical Properties of Collagen Scaffolds by UV Irradiation |
| title_short | A Simple and Efficient Method to Improve Mechanical Properties of Collagen Scaffolds by UV Irradiation |
| title_sort | simple and efficient method to improve mechanical properties of collagen scaffolds by uv irradiation |
| topic | tissue engineering collagen scaffold uv irradiation physical crosslinking mechanical properties |
| url | http://jips.ippi.ac.ir/article_675_c385a4d4a4f0e56def24551d921d2fd2.pdf |
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