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The Epigenetic Regulation Mechanism of CUX1 in Hematopoiesis
The Epigenetic Regulation Mechanism of CUX1 in Hematopoiesis
The Epigenetic Regulation Mechanism of CUX1 in Hematopoiesis

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211151129
ISBN  
9798382781945
DDC  
574
저자명  
Liu, Weihan.
서명/저자  
The Epigenetic Regulation Mechanism of CUX1 in Hematopoiesis
발행사항  
[Sl] : The University of Chicago, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
184 p
주기사항  
Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
주기사항  
Advisor: McNerney, Megan.
학위논문주기  
Thesis (Ph.D.)--The University of Chicago, 2024.
초록/해제  
요약This three-parts thesis presents discovery of the molecular mechanisms underpinning hematopoiesis and its dysregulation in cancer. Identifying tumor suppressor genes on chromosome regions affected by aneuploidy has been historically challenging due to the large number of genes involved. The first part of the thesis leveraged published genome-wide perturbation screen data and advancement in machine learning algorithms in recent years. This work led to a supervised machine learning workflow that systemically predicted the tumor suppressor gene-like activities for all chromosome 7 genes. The second and third parts focus on the multifaceted roles of CUX1 as a pioneer transcription factor. CUX1 is a homeodomain-containing transcription factor (TF) that is essential for development and differentiation of multiple tissues. CUX1 is recurrently mutated or deleted in cancer, particularly in myeloid malignancies. However, the mechanisms by which CUX1 regulates gene expression and differentiation remain poorly understood, creating a barrier to understanding the tumor suppressive functions of CUX1. Herein, we demonstrate that CUX1 directs the BAF chromatin remodeling complex to DNA to increase DNA accessibility in hematopoietic cells. CUX1 preferentially regulates lineage-specific enhancers, and CUX1 target genes are predictive of cell fate in vivo. Moreover, the thesis illuminates the intricate relationship between CUX1 and GATA1, two key regulators in erythropoiesis. In erythroid differentiation, CUX1 dynamically shifts binding targets from hematopoietic stem cell (HSC) -specific enhancers to erythroid specific enhancers co-bound by GATA1. CUX1 gatekeeps GATA1 from abnormal and promiscuous binding by direct physical shielding and indirect mechanisms. These data indicate that CUX1 possesses pioneer factor activities to epigenetically regulate hematopoietic lineage commitment and homeostasis. CUX1 deficiency disrupts these processes in stem and progenitor cells, facilitating transformation. In the erythroid branch of hematopoiesis, CUX1 promotes healthy differentiation through ensuring proper GATA1 binding. By bridging molecular insights from aneuploidy, CUX1 epigenetic regulatory mechanisms, and CUX1-GATA1 interaction, this thesis provides novel insights of the molecular machinery governing hematopoiesis and offers novel perspectives on cancer biology and treatment strategies.
일반주제명  
Biology
일반주제명  
Bioinformatics
일반주제명  
Cellular biology
일반주제명  
Oncology
키워드  
Cancer
키워드  
Cell fate
키워드  
Epegenetics
키워드  
Pioneer factor
키워드  
Stem cells
키워드  
Transcription factor
기타저자  
The University of Chicago Cancer Biology
기본자료저록  
Dissertations Abstracts International. 85-12B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aLiu,  Weihan.▼0(orcid)0000-0002-1023-7955
■24510▼aThe  Epigenetic  Regulation  Mechanism  of  CUX1  in  Hematopoiesis
■260    ▼a[Sl]▼bThe  University  of  Chicago▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a184  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-12,  Section:  B.
■500    ▼aAdvisor:  McNerney,  Megan.
■5021  ▼aThesis  (Ph.D.)--The  University  of  Chicago,  2024.
■520    ▼aThis  three-parts  thesis  presents  discovery  of  the  molecular  mechanisms  underpinning  hematopoiesis  and  its  dysregulation  in  cancer.  Identifying  tumor  suppressor  genes  on  chromosome  regions  affected  by  aneuploidy  has  been  historically  challenging  due  to  the  large  number  of  genes  involved.  The  first  part  of  the  thesis  leveraged  published  genome-wide  perturbation  screen  data  and  advancement  in  machine  learning  algorithms  in  recent  years.  This  work  led  to  a  supervised  machine  learning  workflow  that  systemically  predicted  the  tumor  suppressor  gene-like  activities  for  all  chromosome  7  genes.  The  second  and  third  parts  focus  on  the  multifaceted  roles  of  CUX1  as  a  pioneer  transcription  factor.  CUX1  is  a  homeodomain-containing  transcription  factor  (TF)  that  is  essential  for  development  and  differentiation  of  multiple  tissues.  CUX1  is  recurrently  mutated  or  deleted  in  cancer,  particularly  in  myeloid  malignancies.  However,  the  mechanisms  by  which  CUX1  regulates  gene  expression  and  differentiation  remain  poorly  understood,  creating  a  barrier  to  understanding  the  tumor  suppressive  functions  of  CUX1.  Herein,  we  demonstrate  that  CUX1  directs  the  BAF  chromatin  remodeling  complex  to  DNA  to  increase  DNA  accessibility  in  hematopoietic  cells.  CUX1  preferentially  regulates  lineage-specific  enhancers,  and  CUX1  target  genes  are  predictive  of  cell  fate  in  vivo.  Moreover,  the  thesis  illuminates  the  intricate  relationship  between  CUX1  and  GATA1,  two  key  regulators  in  erythropoiesis.  In  erythroid  differentiation,  CUX1  dynamically  shifts  binding  targets  from  hematopoietic  stem  cell  (HSC)  -specific  enhancers  to  erythroid  specific  enhancers  co-bound  by  GATA1.  CUX1  gatekeeps  GATA1  from  abnormal  and  promiscuous  binding  by  direct  physical  shielding  and  indirect  mechanisms.  These  data  indicate  that  CUX1  possesses  pioneer  factor  activities  to  epigenetically  regulate  hematopoietic  lineage  commitment  and  homeostasis.  CUX1  deficiency  disrupts  these  processes  in  stem  and  progenitor  cells,  facilitating  transformation.  In  the  erythroid  branch  of  hematopoiesis,  CUX1  promotes  healthy  differentiation  through  ensuring  proper  GATA1  binding.  By  bridging  molecular  insights  from  aneuploidy,  CUX1  epigenetic  regulatory  mechanisms,  and  CUX1-GATA1  interaction,  this  thesis  provides  novel  insights  of  the  molecular  machinery  governing  hematopoiesis  and  offers  novel  perspectives  on  cancer  biology  and  treatment  strategies.
■590    ▼aSchool  code:  0330.
■650  4▼aBiology
■650  4▼aBioinformatics
■650  4▼aCellular  biology
■650  4▼aOncology
■653    ▼aCancer
■653    ▼aCell  fate
■653    ▼aEpegenetics
■653    ▼aPioneer  factor
■653    ▼aStem  cells
■653    ▼aTranscription  factor
■690    ▼a0306
■690    ▼a0715
■690    ▼a0379
■690    ▼a0992
■71020▼aThe  University  of  Chicago▼bCancer  Biology.
■7730  ▼tDissertations  Abstracts  International▼g85-12B.
■790    ▼a0330
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160874▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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