Introduction:
Non-surgically with occlusive dressings (OV) treated fingertip injuries result in functionally excellent outcomes with nearly no visible scar formation. The clinically superior outcome is supposed to result from the creation of a moist wound environment, which acts pro-regeneratively. As mesenchymal stem cells (MSC) and fibroblasts (FB) act as important modulators in wound healing, the present work analyzes the effect of wound fluid under OV on the proliferation and migration of these cells.
Material and Methods:
Five days after the application of the OV wound fluid samples of four fingertip injuries (Allen stage II-III) and four split-skin-donor sites, as well as blood serum samples from each patient as controls were collected. MSC and FB (HS27) were incubated in 5% of these wound fluid and blood serum samples. The proliferation and migration of MSC HS27-FB were continuously monitored by impedance analysis for 60 respectively 15 hours. Additionally the proliferation was measured after 72 hours with the Alamarblue-Assay.
Results:
At the beginning of incubation (4-6 hours) the MSC-migration in wound fluid samples from fingertip injuries and split skin donor sites was significantly increased compared to the controls. After 9 hours, this effect was reversed. The migration of HS27-FB was significantly increased between 5 and 10 hours compared to the controls. The proliferation of MSCs of both wound fluids combined showed a significant increase at 5 and 10 hours and a significant decrease after 45 hours. HS27-FB proliferation was significantly decreased in the fingertip fluids alone at 15 and 20 hours. Both wound fluids combined showed a significant reduction after 40 hours. This was confirmed by Alarmarblue assay.
Conclusion:
Using advanced cell surveillance technology, we demonstrate a time-dependent effect of wound fluid under occlusive dressings on migration and proliferation of MSCs and fibroblasts. The early activation of MSC migration and proliferation in combination with an activation of fibroblasts points at a well-orchestrated interplay between stromal cells and occlusive wound fluid, which could be responsible for the improved wound healing process and scar quality seen in occlusively-treated wounds.
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Introduction:
Non-surgically with occlusive dressings (OV) treated fingertip injuries result in functionally excellent outcomes with nearly no visible scar formation. The clinically superior outcome is supposed to result from the creation of a moist wound environment, which acts pro-regeneratively. As mesenchymal stem cells (MSC) and fibroblasts (FB) act as important modulators in wound healing, the present work analyzes the effect of wound fluid under OV on the proliferation and migration of t...
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