Give me a table of growth factors involved in regeneration and repair based on Robbins textbook of pathology
| Growth Factor | Sources | Functions |
|---|---|---|
| Epidermal growth factor (EGF) | Activated macrophages, salivary glands, keratinocytes, many other cells | Mitogenic for many cell types; stimulates epithelial cell migration; stimulates formation of granulation tissue |
| Transforming growth factor-α (TGF-α) | Activated macrophages, keratinocytes, many other cells | Stimulates proliferation of hepatocytes and many other epithelial cells |
| Hepatocyte growth factor (HGF) (scatter factor) | Fibroblasts, stromal cells in the liver, endothelial cells | Enhances proliferation of hepatocytes and other epithelial cells; increases cell motility |
| Vascular endothelial growth factor (VEGF) | Mesenchymal cells | Stimulates proliferation of endothelial cells; increases vascular permeability |
| Platelet-derived growth factor (PDGF) | Platelets, macrophages, endothelial cells, smooth muscle cells, keratinocytes | Chemotactic for neutrophils, macrophages, fibroblasts, and smooth muscle cells; activates and stimulates proliferation of fibroblasts, endothelial cells, and other cells; stimulates ECM protein synthesis |
| Fibroblast growth factors (FGFs) including acidic (FGF-1) and basic (FGF-2) | Macrophages, mast cells, endothelial cells, many other cell types | Chemotactic and mitogenic for fibroblasts; stimulates angiogenesis and ECM protein synthesis |
| Transforming growth factor-β (TGF-β) | Platelets, T lymphocytes, macrophages, endothelial cells, epithelial cells, smooth muscle cells, fibroblasts | Chemotactic for leukocytes and fibroblasts; stimulates ECM protein synthesis; suppresses acute inflammation |
| Keratinocyte growth factor (KGF) (i.e., FGF-7) | Fibroblasts | Stimulates keratinocyte migration, proliferation, and differentiation |
Give me summary of stem cells based on same book
| Division Type | What Happens | When It Occurs |
|---|---|---|
| Asymmetric division | One daughter cell differentiates; the other stays undifferentiated and self-renews | Normal homeostasis |
| Symmetric division | Both daughter cells retain self-renewal capacity | Early embryogenesis (expanding stem cell pools) and under stress (e.g., bone marrow repopulation after chemotherapy) |
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Stem Cell Niches and Differentiation
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