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Regulation of Apoptosis and Differentiation by p53 in Human ...

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TABLE OF CONTENTS<br />

ABBREVIATIONS<br />

LIST OF PUBLICATIONS<br />

ABSTRACT/RESUMO<br />

XII<br />

XIV<br />

XV/XVII<br />

CHAPTER 1 1<br />

Introduction<br />

1.1- HUMAN EMBRYONIC STEM CELLS 3<br />

1.1.1- Criteria to def<strong>in</strong>e an embryonic stem cell 5<br />

1.1.2- Stem cell markers 5<br />

1.1.3- Culture methods for hESC propagation: advantages <strong>and</strong> limitations 7<br />

1.1.4- Ma<strong>in</strong>tenance factors <strong>of</strong> self-renewal <strong>and</strong> pluripotency 9<br />

1.1.4.1- LIF 9<br />

1.1.4.2- Fibroblast growth factor-2 (FGF-2) 10<br />

1.1.4.3- Transform<strong>in</strong>g growth factor β pathway 10<br />

1.1.4.4- Mouse embryonic fibrobasts secreted factors 11<br />

1.1.4.51- Other factors 11<br />

1.1.5- Strategies to improve clonal survival 12<br />

1.1.6- Cell cycle <strong>of</strong> hESC 12<br />

1.1.7- Epigenetics 13<br />

1.1.8- hESC signature <strong>and</strong> gene expression pr<strong>of</strong>il<strong>in</strong>g 13<br />

1.1.9- International Stem Cell Initiative: an attempt to compare 14<br />

different hESC cell l<strong>in</strong>es<br />

1.1.10- In vitro <strong>Differentiation</strong> <strong>of</strong> hESC 15<br />

1.2- GENETIC STABILITY: HESC AS A MODEL 18<br />

1.3- APOPTOSIS 21<br />

1.3.1- <strong>Apoptosis</strong> <strong>in</strong> development <strong>and</strong> homeostasis 21<br />

1.3.2- <strong>Apoptosis</strong> <strong>in</strong> ESC 22<br />

1.3.3- Major molecular regulators <strong>of</strong> apoptosis 23<br />

1.3.3.1- Bcl2 family 23<br />

1.3.3.2- Caspases 24<br />

1.3.4- Biochemistry <strong>of</strong> apoptosis 25<br />

1.3.3- Apoptotic pathways 25<br />

1.3.3.1- The Extr<strong>in</strong>sic Pathway 25<br />

1.3.3.2- The Intr<strong>in</strong>sic Pathway 25<br />

1.4- TUMOUR SUPPRESSOR P53 27<br />

1.4.1- <strong>p53</strong> knockout mice 28<br />

1.4.2- <strong>p53</strong> <strong>in</strong> apoptosis 28<br />

1.4.3- <strong>p53</strong> family <strong>and</strong> differentiation 30<br />

1.4.4- Role <strong>of</strong> <strong>p53</strong> <strong>in</strong> hESC 31<br />

1.5- RNA INTERFERENCE: SHRNA AND LENTIVIRUS 32<br />

1.5.1- Mechanism <strong>of</strong> RNAi 32<br />

1.5.2- Tool to study gene function 33<br />

1.6- AIMS AND HYPOTHESIS 35<br />

CHAPTER 2 37<br />

Material <strong>and</strong> Methods<br />

Section 2.1- Cell Culture Methods 40<br />

2.1.1- Commonly Used Tissue Culture Solutions, Reagents <strong>and</strong> Materials 40<br />

2.1.1.1- Growth factors 40<br />

2.1.1.2- Extracellular matrices 41<br />

2.1.1.3- Enzymes <strong>and</strong> dissociation solutions 41<br />

2.1.1.4- Miscellaneous Culture Components, Solutions <strong>and</strong> Material 42<br />

2.1.1.5- Medium solutions 43<br />

- ix -

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