Abstract
A cDNA clone for rat pro α1(V) collagen mRNA was constructed using PCR amplification, with primers based on human and hamster COL5A1 gene sequences. The clone pRCVA1 is 560 nucleotides long and it encodes for the carboxy propeptide of type V procollagen. Homology shared with type I collagen sequence was 64%, with type II collagen 65% and with type III collagen 61%. To evaluate the spatial and temporal expression of type V collagen mRNA in wound healing model, subcutaneously implanted viscose cellulose sponges in rats were used to induce granulation tissue formation. Analyses on granulation tissue were carried out on days 5, 8,14, 21, 30, 59 and 84. Specific cDNA probes to pro α1(I), pro α1(III) and pro α1(V) collagen mRNA were used in slot blot, Northern and in situ hybridization. Type I collagen gene expression was upregulated at the initial stage of wound healing, type III collagen gene expression was constant and from the day 14 onwards type I and III collagen gene expressions were at the same level. Type V collagen gene expression was seen at every time point studied but at a considerably lower level than type I and III collagens. In situ hybridization showed that type V collagen was expressed in two different cell types. In conclusion, type V collagen was expressed in the wound healing model from at least day 5 onwards and it was synthesized by fibroblast-like and rounded cells.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
