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The keratinocyte growth factor (KGF), also known as FGF7, is a growth factor present in the epithelialization-phase of wound healing. In this phase, keratinocytes are covering the wound, forming the epithelium. KGF is a small signaling molecule that binds to fibroblast growth factor receptor 2b (FGFR2b). [1]
This protein is a potent epithelial cell-specific growth factor, whose mitogenic activity is predominantly exhibited in keratinocytes but not in fibroblasts and endothelial cells. Studies of mouse and rat homologs of this gene implicated roles in morphogenesis of epithelium, reepithelialization of wounds, hair development and early lung ...
Since keratinocyte differentiation inhibits keratinocyte proliferation, factors that promote keratinocyte proliferation should be considered as preventing differentiation. These factors include: The transcription factor p63, which prevents epidermal stem cells from differentiating into keratinocytes. [23]
Transforming growth factor Alpha is an autocrine growth factor by which basal cells stimulate their own division. Keratinocyte growth factor (KGF or FGF7) is a paracrine growth factor produced by the underlying dermal fibroblasts in which the proliferation of basal cells is regulated.
A growth factor is a naturally occurring substance capable of stimulating cell proliferation, wound healing, and occasionally cellular differentiation. [1] Usually it is a secreted protein or a steroid hormone .
IL-7 is a hematopoietic growth factor secreted by stromal cells in the bone marrow and thymus. It is also produced by keratinocytes, [9] follicular dendritic cells, [10] hepatocytes, [11] neurons, and epithelial cells, [12] but is not produced by normal lymphocytes. [13]
HB-EGF is the predominant growth factor in the epithelialization required for cutaneous wound healing. The mitogenic and migratory effects of HB-EGF on keratinocytes and fibroblasts promotes dermal repair and angiogenesis necessary for wound healing and is a major component of wound fluids. [19]
Keratinocyte growth factor (KGF) resides in the family of fibroblast growth factor (FGF). The drug's target is the KGF receptor. Through the binding of this drug to the aforementioned receptor, Palifermin stimulates epithelial cell proliferation, differentiation, and upregulation of cytoprotective mechanisms to reduce the symptoms of oral mucositis.