Dermal fibroblast altering their actin gene expression (which is silenced in dermal fibroblasts). When dermal fibroblasts express actin, the cells can slowly contract. This contraction plays a critical role in wound healing and fibrosis. By pulling tissues closed differentiated myofibroblasts, seal the skin after an injury (thereby, preventing infection but inducing scar formation. Myofibroblasts can also be derived from non-fibroblast sources. Based on evidence of α-SMA expression from lung injuries, myofibroblasts can "arise de novo" directly from mesenchymal stem cells. Unlike other fibroblast cell types, dermal fibroblasts are far less likely to change into other cell types. For example, when a dermal
Catholic theology of the body the image of God. These questions, addressed by the ancient Church, are relevant to a modern theology of the body, because they relate to concerns and definitions on the beginning and nature of human life. Clement of Alexandria (140?-220) viewed the body as the inferior partner in the body-soul relationship. The body tends to be sinful. The soul has three advantages over the body: it gives unity and life to the body; allows the body to reason; and is oriented towards God, while the body is oriented towards food and sex. The body is the grave of the soul, but