Role of keratinocytes in wound contraction: an impact assessment using a model of collagen matrix populated with fibroblasts Papel do queratinócito na contração da ferida: avaliação de impacto usando um modelo de matriz de colágeno povoada por fibroblastos

Background: The possible participation of keratinocytes in wound remodeling has been widely studied. This study investigated the impact of keratinocytes in wound contraction. Methods: Murine type I collagen gels populated by human fibroblasts and seeded with human keratinocytes on the surface to form a dermo-epidermal equivalent were used as the study group. Collagen gels populated by only fibroblasts were used as the control group. The criteria for the preparation and storage of gels were similar for both groups. Results: An evident and statistically significant increase in gel contraction was observed in samples populated by keratinocytes compared to the control group. Conclusions: These results suggest that keratinocytes not only modulate fibroblast proliferation but also play an active role in wound contraction per se. Further research on the mechanisms involved in the communication pathways between cells and between cells and the matrix shall be assessed from the perspective of keratinocyte participation in wound healing and pathologic scarring.