title: Feasibility study of the natural derived chitosan dialdehyde for chemical modification of collagen.
abstract: The aim of this study is to evaluate the chemical crosslinking effects of the natural derived chitosan dialdehyde (OCS) on collagen. Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC) and circular dichroism (CD) measurements suggest that introducing OCS might not destroy the natural triple helix conformation of collagen but enhance the thermal-stability of collagen. Meanwhile, a denser fibrous network of cross-linked collagen is observed by atomic force microscopy. Further, scanning electron microscopy (SEM) and aggregation kinetics analysis confirm that the fibrillation process of collagen advances successfully and OCS could lengthen the completion time of collagen fibrillogenesis but raise the reconstitution rate of collagen fibrils or microfibrils. Besides, the cytocompatibility analysis implies that when the dosage of OCS is less than 15%, introducing OCS into collagen might be favorable for the cell's adhesion, growth and proliferation. Taken as a whole, the present study demonstrates that OCS might be an ideal crosslinker for the chemical fixation of collagen.
authors.affiliation: Key Laboratory for Leather Chemistry and Engineering of the Education Ministry, Sichuan University, Chengdu, Sichuan 610065, China; Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
authors.forename: Xinhua
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory for Leather Chemistry and Engineering of the Education Ministry, Sichuan University, Chengdu, Sichuan 610065, China; Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
authors.forename: Nianhua
authors.initials: N
authors.lastname: Dan
authors.affiliation: Key Laboratory for Leather Chemistry and Engineering of the Education Ministry, Sichuan University, Chengdu, Sichuan 610065, China; Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China. Electronic address: danweihua_scu@126.com.
authors.forename: Weihua
authors.initials: W
authors.lastname: Dan
authors.affiliation: Key Laboratory for Leather Chemistry and Engineering of the Education Ministry, Sichuan University, Chengdu, Sichuan 610065, China; Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
authors.forename: Juxia
authors.initials: J
authors.lastname: Gong
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D045744:Cell Line, Tumor; D048271:Chitosan / Q000737:chemistry* / Q000494:pharmacology; D002942:Circular Dichroism; D003094:Collagen / Q000737:chemistry* / Q000648:ultrastructure; D006801:Humans; D008422:Materials Testing; D018625:Microscopy, Atomic Force; D017550:Spectroscopy, Fourier Transform Infrared; D013552:Swine
chemical_list: D001672:Biocompatible Materials; D003094:Collagen; D048271:Chitosan
keywords: Chitosan dialdehyde; Collagen; Modification