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Naturally Programmed Cell Death, Apoptosis, and Cancer

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Presentation on theme: "Naturally Programmed Cell Death, Apoptosis, and Cancer"— Presentation transcript:

1 Naturally Programmed Cell Death, Apoptosis, and Cancer
Folder Title: Apoptose or ... December 1, 2004 TtlApop

2 What happened to your webbed feet?
You guys are dethpicable. DaffyDuc

3 God and Michelangelo Creation by Subtraction Evolution:
Selective Reproduction Selective Death Subtract

4 Selective Cell Death in Normal Development and Normal Organismic Functioning
Developmental Remodelling Tadpole to Frog Human Fetal Remodelling Immunological Self-Tolerance Normal Physiology Post-Lactation Breast Involution Menstruation Normal Immune T-Cell Killing NormApop

5

6 Necrosis vs Apoptosis Necrosis Apoptosis Clumped Chromatin
Swelling of Organelles Cell Distension Membrane Disruption Inflammation Apoptosis Condensed Nuclear Fragments Shrunken Cytoplasm Membrane Blebs (Apoptotic Bodies) Phagocytosis without Inflammation Kill&Die

7 Apoptotic Cell. Ruddon, 3rd Ed. Fig. 10-7
ApoCell

8 from Scientific American, December, 1996
Membrane Blebs on a Cell Undergoing Apoptosis from Scientific American, December, 1996 ApoBlebs

9 DNA Lysis into "DNA Ladder". DNA from Apoptotic Cell.
From Ruddon, 3rd Ed., Figure 10-8 ApoDNA

10 Genetic Control of "Genetically Programmed Cell Death"
Cellular Location of Protein Product Mitochondrial Membrane Nuclear Envelope Endoplasmic Reticulum Nucleus Cell Membrane Apoptosis Gene Effect on Apoptosis Blocks Stimulates Wild-type Stimulates Mutant Blocks bcl-2 myc p53 p53* APO-1/ FAS ApoGenes

11 Exogenous Genetic Suppressors of Apoptosis
Adenovirus E1b Oncoprotein Ras v-abl compox crm a gene product ExoApop1

12 Exogenous Inducers of Apoptosis
Cytotoxic T-Lymphocyte Attack on Target Cells Loss of Growth Factors Loss of Responses from Neighboring Cells DNA-Directed Anti-Neoplastic Agents ExoApop2

13 More Exogenous Inducers of Apoptosis (from Ruddon, 3rd Ed., p. 397)
Differentiation Signals Removal of Growth Factors or Required Hormones Exposure to Transforming Growth Factor B (TGF-B) Tumor Necrosis Factor (TNF) Glucocorticoids (Immune-modulating Corticosteroids) DNA-damaging Antineoplastic Agents Environmental Toxins Agents Stimulating Ca Influx (Calcium Ionophores) Cytoskeletal-directed Microtubule Disruptors Microfilament-directed Cytochalasin B Inhibits formation of Apoptotic Bodies, but not apoptosis itself ExoApop3

14 Normal T-Cell Activation by
Antigen-Presenting Cells. (from Sci. Am., Dec, 1996) TCellAct

15 Activated T-Cell Down-regulation via FAS Cell-Surface
Protein and Ligand Binding to FAS. (from Sci. Am., Dec., 1996) TCelDown


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