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Thesis (Ph. D.)--Cornell University, January, 2009. / Vita. Includes bibliographical references (leaves 79-86).

Thesis (Ph. D.)--University of Alabama at Birmingham, 2006. / Title from first page of PDF file (viewed Feb. 18, 2009). Includes bibliographical references.

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To, Ka Yan. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (p. 115-120). / Abstracts in English and Chinese. / Acknowledgement --- p.i / Abstract --- p.ii / 中文摘要 --- p.vi / List of abbreviations --- p.ix / List of tables --- p.xii / List of figures --- p.xiii / Contents --- p.xvi / Chapter Chapter One: --- General introduction --- p.1 / Chapter 1.1 --- Background of Hepatocellular carcinoma (HCC) --- p.2 / Chapter 1.2.1 --- ZBP-89 structure and its expression in cancers --- p.3 / Chapter 1.2.2 --- Transcriptional regulation of ZBP-89 --- p.5 / Chapter 1.3.1 --- Apoptosis and necrosis --- p.6 / Chapter 1.3.2 --- Mechanisms of Apoptosis --- p.7 / Chapter 1.4 --- Bcl-2 family --- p.11 / Chapter 1.5 --- Regulation of p53 cancer cells --- p.12 / Chapter 1.6 --- The aim of the study --- p.13 / Chapter Chapter Two: --- Up-regulation of Bak expression by Ad-ZBP-89 induce apoptosis in human liver cancer cells --- p.15 / Chapter 2.1. --- Introduction --- p.16 / Chapter 2.2. --- Materials and methods --- p.18 / Chapter 2.2.1. --- Cell culture --- p.18 / Chapter 2.2.2. --- RT-PCR --- p.19 / Chapter 2.2.3. --- Western blotting --- p.21 / Chapter 2.2.4. --- Adenovirus infection and Cell viability assay --- p.24 / Chapter 2.2.5. --- Detection of apoptosis --- p.26 / Chapter 2.2.6. --- RNA interference --- p.27 / Chapter 2.2.7. --- Statistical analysis --- p.29 / Chapter 2.3. --- Results --- p.30 / Chapter 2.3.1. --- Endogenous expression of ZBP-89 and Bak of human liver cancer cells --- p.30 / Chapter 2.3.2. --- Effects of Ad-ZBP-89 on proliferation in HCC cell lines --- p.31 / Chapter 2.3.3. --- Effects of Ad-ZBP-89 on the expression of Bcl-2 family members --- p.34 / Chapter 2.3.4. --- ZBP-89 induced Bak expression and release of cytochrome c --- p.39 / Chapter 2.3.5. --- Effects of Ad-ZBP-89 on apoptosis rate in HCC cell lines --- p.41 / Chapter 2.3.6. --- Effects of ZBP-89 siRNA on expression of Bcl-2 family members and proliferation in HCC cell lines --- p.43 / Chapter 2.3.7. --- Effects of Bak siRNA and its combined effect with Ad-ZBP-89 on the expression of Bak and reduced apoptosis in HCC cell lines --- p.50 / Chapter 2.4. --- Discussion --- p.55 / Chapter Chapter Three: --- Identification of ZBP-89 protein as an apoptosis activator for a pro-apoptotic Bak gene promoter --- p.60 / Chapter 3.1. --- Introduction --- p.61 / Chapter 3.2. --- Materials and methods --- p.64 / Chapter 3.2.1. --- Cell lines and tissues --- p.64 / Chapter 3.2.2. --- Transient transfection and Luciferase activity assay --- p.64 / Chapter 3.2.3. --- pGL3-Bak-promoter vector construction --- p.67 / Chapter 3.2.4. --- "Preparation of mitochondrial, cytosolic and nuclear fractions" --- p.74 / Chapter 3.2.5. --- Electrophoretic mobility shift assay --- p.75 / Chapter 3.2.6. --- Overexpression of Bak --- p.76 / Chapter 3.2.7. --- RT-PCR and Western blot analysis on HCC tissues samples --- p.80 / Chapter 3.2.8. --- Statistical Analysis --- p.80 / Chapter 3.3. --- Results --- p.81 / Chapter 3.3.1. --- ZBP-89 activates Bak-luciferase promoter genes in HCC cells --- p.81 / Chapter 3.3.2. --- ZBP-89 activates shortened Bak-luc-promoter in PLC/PRF/5 and SK-Hep-1 cells --- p.82 / Chapter 3.3.3. --- ZBP-89 is a potential binding protein to the Bak promoter gene region -457/-407 --- p.85 / Chapter 3.3.4. --- The combined effects of Bak overexpression and Ad-ZBP-89 induce apoptosis in HCC cells --- p.89 / Chapter 3.3.5. --- The combined effects on Bak protein expression --- p.94 / Chapter 3.3.6. --- Bak expression in HCC tissues --- p.98 / Chapter 3.4. --- Discussion --- p.99 / Chapter Chapter Four: --- Conclusion and Future Perspectives --- p.104 / Chapter 4.1. --- Conclusion --- p.104 / Chapter 4.2. --- Future Perspectives --- p.112 / Reference --- p.113

Doctor of Philosophy (PhD) / Gene expression is known to be regulated at the level of transcription. Recently, however, there has been a growing realisation of the importance of gene regulation at the post-transcriptional level, namely at the level of pre-mRNA processing (5’ capping, splicing and polyadenylation), nuclear export, mRNA localisation and translation. Erythroid krüppel-like factor (Eklf) is the founding member of the Krüppel-like factor (Klf) family of transcription factors and plays an important role in erythropoiesis. In addition to its nuclear presence, Eklf was recently found to localise to the cytoplasm and this observation prompted us to examine whether this protein has a role as an RNA-binding protein, in addition to its well-characterised DNA-binding function. In this thesis we demonstrate that Eklf displays RNA-binding activity in an in vitro and in vivo context through the use of its classical zinc finger (ZF) domains. Furthermore, using two independent in vitro assays, we show that Eklf has a preference for A and U RNA homoribopolymers. These results represent the first description of RNA-binding by a member of the Klf family. We developed a dominant negative mutant of Eklf by expressing its ZF region in murine erythroleukaemia (MEL) cells. We used this to investigate the importance of this protein in haematopoietic lineage decisions by examining its effect on the multipotent K562 cell line. We provide evidence that Eklf appears to be critical not only for the promotion of erythropoiesis, but also for the inhibition of megakaryopoiesis.

Thesis (Ph.D.)--University of Alabama at Birmingham, 2009. / Title from PDF title page (viewed on Feb. 10, 2010). Includes bibliographical references.

Doctor of Philosophy (PhD) / Gene expression is known to be regulated at the level of transcription. Recently, however, there has been a growing realisation of the importance of gene regulation at the post-transcriptional level, namely at the level of pre-mRNA processing (5’ capping, splicing and polyadenylation), nuclear export, mRNA localisation and translation. Erythroid krüppel-like factor (Eklf) is the founding member of the Krüppel-like factor (Klf) family of transcription factors and plays an important role in erythropoiesis. In addition to its nuclear presence, Eklf was recently found to localise to the cytoplasm and this observation prompted us to examine whether this protein has a role as an RNA-binding protein, in addition to its well-characterised DNA-binding function. In this thesis we demonstrate that Eklf displays RNA-binding activity in an in vitro and in vivo context through the use of its classical zinc finger (ZF) domains. Furthermore, using two independent in vitro assays, we show that Eklf has a preference for A and U RNA homoribopolymers. These results represent the first description of RNA-binding by a member of the Klf family. We developed a dominant negative mutant of Eklf by expressing its ZF region in murine erythroleukaemia (MEL) cells. We used this to investigate the importance of this protein in haematopoietic lineage decisions by examining its effect on the multipotent K562 cell line. We provide evidence that Eklf appears to be critical not only for the promotion of erythropoiesis, but also for the inhibition of megakaryopoiesis.

Thesis (Ph.D.)--University of Alabama at Birmingham, 2007. / Title from PDF title page (viewed on Sept. 16, 2009). Includes bibliographical references.

No description available.