The expression of collagen type i and type Ii during the second fracture healing
Zhang, X.; Wang, F.; Jiang, H.; Li, R.
Hua Xi Yi Ke da Xue Xue Bao 33(2): 204-206
2002
ISSN/ISBN: 0257-7712 PMID: 12575185 Document Number: 551612
This study was conducted to disclose the rules of collagen type I and II production and hence to acquire knowledge about the mechanism of repairing during the second period of fracture healing. An experimental model of second fracture healing at rat's femurs was used to study the production of collagen type I and II by means of immunohistochemistry; meanwhile the histologic changes were observed with the use of HE staining and Alcian blue staining at 3 days, 1, 2, 3, 4 weeks postoperatively. The expression of both collagen type I and II was detected by immunohistochemistry at 1 week. The peak expression of collagen type II occurred at 3 weeks. The higher expression of collagen type I was observed at 4 weeks. The morphologic changes of chondrocyte and the production of collagen type I and II by chondrocyte in cartilage callus are correlated with their repairing function during different periods of fracture healing.