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A fibroblast is a type of biological cell typically with a spindle shape [1] that synthesizes the extracellular matrix and collagen, [2] produces the structural framework for animal tissues, and plays a critical role in wound healing. [3] Fibroblasts are the most common cells of connective tissue in animals.
By the end of the first week, fibroblasts are the main cells in the wound. [3] Fibroplasia ends two to four weeks after wounding. As a model the mechanism of fibroplasia may be conceptualised as an analogous process to angiogenesis (see above) - only the cell type involved is fibroblasts rather than endothelial cells.
Fibroblasts, the main cells that deposit granulation tissue, depend on oxygen to proliferate and lay down the new extracellular matrix. [7] In vascularisation, also called angiogenesis, endothelial cells quickly grow into the tissue from older, intact blood vessels. [8] These branch out in a systematic way, forming anastomoses with other vessels.
Stratagraft is produced from two kinds of human skin cells (keratinocytes and dermal fibroblasts) grown together to make a bi-layered construct (a cellularized scaffold). [3] Since the human keratinocyte cells were grown with mouse cells during initial stages of product development, Stratagraft is formally considered to be a xenotransplantation ...
Skin grafting, a type of graft surgery, involves the transplantation of skin without a defined circulation. The transplanted tissue is called a skin graft. [1] Surgeons may use skin grafting to treat: extensive wounding or trauma; burns; areas of extensive skin loss due to infection such as necrotizing fasciitis or purpura fulminans [2]
The graft can be seeded with autologous cells (keratinocytes) in order to accelerate wound closure, however the presence of these cells is not required for regenerating the dermis. [10] Grafting skin wounds with Integra leads to the synthesis of normal vascularized and innervated dermis de novo, followed by re-epithelization and formation of ...
In a major injury, if epithelial cell migration and tissue contraction cannot cover the wound, suturing the edges of the injured skin together, or even replacement of lost skin with skin grafts, may be required to restore the skin. As epithelial cells continue to migrate around the scab, the dermis is repaired by the activity of stem cells ...
Parietal epithelial cell (PEC) Podocyte; Angioblast → Endothelial cell; Mesangial cell. Intraglomerular; Extraglomerular; Juxtaglomerular cell; Macula densa cell; Stromal cell → Interstitial cell → Telocytes; Kidney proximal tubule brush border cell; Kidney distal tubule cell; Connecting tubule cells; α-intercalated cell; β-intercalated ...