Tumor Initiating Cells, Cell Cycle Control and Cancer Stem Cells

Tumor Initiating Cells, Cell Cycle Control and Cancer Stem Cells Tumor Initiating Cells, Cell Cycle Control and Cancer Stem Cells

biochemistry.utoronto.ca
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03.01.2015 Views

Hallmark Tumor suppressor Function Evading apoptosis p53 Induces apoptotic genes (Bax) Self-sufficiency in Pten Dephosphorylates PIP3, counteracting PI3K growth signal pRb Inhibits E2F - cell proliferation Insensitivity to anti- SMAD4 Induces CDK4/6 inhibitor p16 ink4a in response to TGF growth signals p16 ink4a Inhibits cyclins DNA damage stress ATM Induces p53 and DNA repair machinery Mitotic stress LATS2 Inhibits MDM2 (activates p53) Normoxia VHL E3 ligase of HIF-1 (induces angiogenesis)

signal + Signaling, oncogenes, tumor-suppressors and non-oncogene addiction Oncogene - Tumor suppressor - Negative regulator that is not mutated/lost in cancer + Positive regulator that is not activated in cancer but its inactivation blocks signaling - non-oncogene addiction

Hallmark<br />

<strong>Tumor</strong><br />

suppressor<br />

Function<br />

Evading apoptosis p53 Induces apoptotic genes (Bax)<br />

Self-sufficiency in Pten Dephosphorylates PIP3, counteracting PI3K<br />

growth signal pRb Inhibits E2F - cell proliferation<br />

Insensitivity to anti- SMAD4 Induces CDK4/6 inhibitor p16 ink4a in response to TGF<br />

growth signals p16 ink4a Inhibits cyclins<br />

DNA damage stress ATM Induces p53 <strong>and</strong> DNA repair machinery<br />

Mitotic stress LATS2 Inhibits MDM2 (activates p53)<br />

Normoxia VHL E3 ligase of HIF-1 (induces angiogenesis)

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