Journal
NATURE PROTOCOLS
Volume 1, Issue 6, Pages 2753-2758Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nprot.2006.430
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Collagen is a widely investigated extracellular matrix material with extensive potentials in the field of tissue engineering. This protocol describes a method to prepare reconstituted collagen that can be ready-to-use, storable and suitable for further in vitro and in vivo investigations. Type I collagen was extracted from rat tail tendons and processed in acetic acid solution to obtain sterile soluble collagen. At first, crude collagen was dissolved in acetic acid, then frozen at -20 degrees C and lyophilized to obtain a sponge, which could be stored at -80 degrees C. Lyophilized collagen was then dispersed in acetic acid to obtain a sterile solution of collagen at targeted concentrations. The whole low-cost process from the extraction to the final sterile solution takes around 2-3 weeks. The collagen solution, once neutralized, has the potential to be used to produce gels or scaffolds, to deposit thin films on supports and to develop drug delivery systems.
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