Collagen deposition and mechanical strength of colon anastomoses and skin incisional wounds of rats

The Journal of Surgical Research
H OxlundT T Andreassen

Abstract

The mechanical strength development of healing wounds depends on the formation of collagen fibrils bridging the wound cleft. A considerable deposition, degradation, and remodeling of these fibrils takes place influencing the mechanical strength of the healing wounds. A method for studies of wound collagen metabolism in vivo is delineated, enabling determination of collagen deposition per hour in rat colon anastomoses and skin incisional wounds. Labeled proline was incorporated into wound collagen with a flooding dose of unlabeled proline, reducing errors introduced by proline recycling and proline de novo synthesis. The mechanical strength was determined by a materials testing machine. In both colon anastomoses and skin wounds a substantial increase in collagen deposition was observed at Day 2, reached a maximum at Day 6, and was still relatively high at Day 12 during the remodeling of collagen fibers in the wound cleft. The collagen deposition in colon anastomoses at Day 6, however, was 10-fold higher compared with that of the skin incisional wounds. The time course of the collagen deposition was much alike in colon anastomoses and skin incisional wounds reaching a maximum at Day 6. The mechanical strength of these two rather ...Continue Reading

Citations

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