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Hanahan & Weinberg: The hallmarks of cancer. Cell 100:57-70, 2000. ONCOGENE ACTIVATION. ONCOGENE ACTIVATION. TUMOR SUPPRESSOR INACTIVATION. 1) Point mutation. p53. TUMOR SUPPRESSOR INACTIVATION. 1) Point mutation : p53, BRCA1 etc. 2) Deletion 3) Epigenetic silencing. Locus 9p21.
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Hanahan & Weinberg: The hallmarks of cancer. Cell 100:57-70, 2000
TUMOR SUPPRESSOR INACTIVATION 1) Point mutation p53
TUMOR SUPPRESSOR INACTIVATION 1) Point mutation: p53, BRCA1 etc. 2) Deletion 3) Epigeneticsilencing
TUMOR SUPPRESSOR INACTIVATION 1) Point mutation: p53, BRCA1 etc. 2) Deletion 3) Epigeneticsilencing 4) Protein-proteininteractions
TUMOR SUPPRESSOR INACTIVATION Protein-protein interactions
Cellula normale PTEN Cellula tumorale PTEN effetti lievi attività PI3K/Akt/mTOR INIBITORI DI mTOR attività PI3K/Akt/mTOR
Table 1 Examples of oncogene addiction: studies in mice Weinstein IB and Joe AK (2006) Mechanisms of Disease: oncogene addiction—a rationale for molecular targeting in cancer therapy Nat Clin Pract Oncol 3: 448–457 10.1038/ncponc0558
Table 2 Examples of oncogene addiction: studies in human cancer cell lines Weinstein IB and Joe AK (2006) Mechanisms of Disease: oncogene addiction—a rationale for molecular targeting in cancer therapy Nat Clin Pract Oncol 3: 448–457 10.1038/ncponc0558
Table 3 Clinical evidence of oncogene addiction Weinstein IB and Joe AK (2006) Mechanisms of Disease: oncogene addiction—a rationale for molecular targeting in cancer therapy Nat Clin Pract Oncol 3: 448–457 10.1038/ncponc0558
Twogenes (‘A’ and ‘B’) are said to be synthetic lethal if mutation of either gene alone is compatible with viability but simultaneous mutation of both genes causes death.
Cellula normale Rb Cellula tumorale Rb SOPRAVVIVENZA blocco attività E2F VELENI DELLA TOPO II espressione gene A espressione gene topoisomerasi II attività E2F espressione gene B espressione gene C
B is an extragenicsuppressorof A if mutation of B suppresses the phenotype observed when A is mutated.
% B inhibition % B inhibition
HOW CAN WE SELECTIVELY TARGET TUMOR RELEVANT DEFECTS? INIBIT GENE EXPRESSION INIBIT PROTEIN FUNCTION Small molecule inhibitors AS-ODN mAbs siRNA