CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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VEGF
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HIF1B
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Proto-oncogenes
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P 53
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Detailed explanation-1: -VEGF-A production can be induced in a cell that is not receiving enough oxygen. When a cell is deficient in oxygen, it produces HIF, hypoxia-inducible factor, a transcription factor. HIF stimulates the release of VEGF-A, among other functions (including modulation of erythropoiesis).
Detailed explanation-2: -The major physiological stimuli for angiogenesis include tissue ischemia and hypoxia, inflammation, and shear stress. A number of specific factors are known to stimulate or inhibit angiogenesis, including vascular growth factors, inflammatory cytokines, adhesion molecules, and nitric oxide.
Detailed explanation-3: -VEGF is produced by hypertrophic chondrocytes in the growth plate where it co-ordinates extracellular matrix (ECM) remodelling, angiogenesis, and bone formation. VEGF is expressed in the synovial fluid of patients with rheumatoid arthritis.