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YAP Regulation in the Preimplantation Embryo and Its Role in the First Cell Fate Decision
YAP Regulation in the Preimplantation Embryo and Its Role in the First Cell Fate Decision
YAP Regulation in the Preimplantation Embryo and Its Role in the First Cell Fate Decision

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202103102
ISBN  
9798280752535
DDC  
574
저자명  
Chalifoux, Madeleine M.
서명/저자  
YAP Regulation in the Preimplantation Embryo and Its Role in the First Cell Fate Decision
발행사항  
[Sl] : Princeton University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
108 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Posfai, Eszter;Shvartsman, Stanislav.
학위논문주기  
Thesis (Ph.D.)--Princeton University, 2025.
초록/해제  
요약In an event known as the first cell fate decision of mammalian embryonic development, the cells of the early embryo are segregated into two distinct cell populations: trophectoderm (TE) cells that will give rise to the placenta, a vital extraembryonic support tissue, and cells belonging to the inner cell mass (ICM), which will give rise to the body of the future organism. A key determinant of the TE/ICM fate decision is the transcriptional cofactor, Yes-associated protein (YAP). When localized to the nucleus, YAP can activate or repress TE and ICM fate-specific transcription factor expression, respectively. Cell polarity has been established to regulate YAP localization in the preimplantation embryo through the Hippo signaling pathway; however, it is not known whether YAP responds to additional inputs as cells undergo dynamic morphological changes and progress through cell cycles. Additionally, how YAP dynamics are read out to result in robust expression of SOX2 in ICM cells and CDX2 in TE cells also remains to be investigated.Here, I use genetically engineered reporters for YAP, CDX2, and SOX2 along with quantitative live imaging microscopy to investigate the dynamic mechanisms by which cells acquire their fate during the first days of mammalian development. I find that, unlike in multiple other systems, YAP localization does not respond to mechanical cell shape perturbations in the early embryo. Rather, I show that in addition to the previously known correlation with relative exposed surface area, which represents the polarity state of cells, nuclear YAP levels are also influenced by additional factors, such as the decreasing pool of maternally provided YAP that is partitioned to daughter cells through divisions, cell cycle-associated nuclear volume changes, and a delay after divisions in adjusting YAP levels to new cell positions. Using a generative model for preimplantation development, I further investigate the time-dependent statistics of TE and ICM cell allocation and reveal the stochastic nature of the induction timing of YAP target genes, identifying features of YAP dynamics that are necessary or sufficient for this induction and laying the groundwork for the future analysis of dynamic developmental systems.
일반주제명  
Developmental biology
일반주제명  
Cellular biology
일반주제명  
Biology
키워드  
Cell fate
키워드  
Dynamic Bayesian networks
키워드  
Embryo
키워드  
Preimplantation
키워드  
Yes-associated protein
기타저자  
Princeton University Chemical and Biological Engineering
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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MARC

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■035    ▼a(MiAaPQ)AAI31934745
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■1001  ▼aChalifoux,  Madeleine  M.▼0(orcid)0000-0002-3061-7971
■24510▼aYAP  Regulation  in  the  Preimplantation  Embryo  and  Its  Role  in  the  First  Cell  Fate  Decision
■260    ▼a[Sl]▼bPrinceton  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a108  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Posfai,  Eszter;Shvartsman,  Stanislav.
■5021  ▼aThesis  (Ph.D.)--Princeton  University,  2025.
■520    ▼aIn  an  event  known  as  the  first  cell  fate  decision  of  mammalian  embryonic  development,  the  cells  of  the  early  embryo  are  segregated  into  two  distinct  cell  populations:  trophectoderm  (TE)  cells  that  will  give  rise  to  the  placenta,  a  vital  extraembryonic  support  tissue,  and  cells  belonging  to  the  inner  cell  mass  (ICM),  which  will  give  rise  to  the  body  of  the  future  organism.  A  key  determinant  of  the  TE/ICM  fate  decision  is  the  transcriptional  cofactor,  Yes-associated  protein  (YAP).  When  localized  to  the  nucleus,  YAP  can  activate  or  repress  TE  and  ICM  fate-specific  transcription  factor  expression,  respectively.  Cell  polarity  has  been  established  to  regulate  YAP  localization  in  the  preimplantation  embryo  through  the  Hippo  signaling  pathway;  however,  it  is  not  known  whether  YAP  responds  to  additional  inputs  as  cells  undergo  dynamic  morphological  changes  and  progress  through  cell  cycles.  Additionally,  how  YAP  dynamics  are  read  out  to  result  in  robust  expression  of  SOX2  in  ICM  cells  and  CDX2  in  TE  cells  also  remains  to  be  investigated.Here,  I  use  genetically  engineered  reporters  for  YAP,  CDX2,  and  SOX2  along  with  quantitative  live  imaging  microscopy  to  investigate  the  dynamic  mechanisms  by  which  cells  acquire  their  fate  during  the  first  days  of  mammalian  development.  I  find  that,  unlike  in  multiple  other  systems,  YAP  localization  does  not  respond  to  mechanical  cell  shape  perturbations  in  the  early  embryo.  Rather,  I  show  that  in  addition  to  the  previously  known  correlation  with  relative  exposed  surface  area,  which  represents  the  polarity  state  of  cells,  nuclear  YAP  levels  are  also  influenced  by  additional  factors,  such  as  the  decreasing  pool  of  maternally  provided  YAP  that  is  partitioned  to  daughter  cells  through  divisions,  cell  cycle-associated  nuclear  volume  changes,  and  a  delay  after  divisions  in  adjusting  YAP  levels  to  new  cell  positions.  Using  a  generative  model  for  preimplantation  development,  I  further  investigate  the  time-dependent  statistics  of  TE  and  ICM  cell  allocation  and  reveal  the  stochastic  nature  of  the  induction  timing  of  YAP  target  genes,  identifying  features  of  YAP  dynamics  that  are  necessary  or  sufficient  for  this  induction  and  laying  the  groundwork  for  the  future  analysis  of  dynamic  developmental  systems.
■590    ▼aSchool  code:  0181.
■650  4▼aDevelopmental  biology
■650  4▼aCellular  biology
■650  4▼aBiology
■653    ▼aCell  fate
■653    ▼aDynamic  Bayesian  networks
■653    ▼aEmbryo
■653    ▼aPreimplantation
■653    ▼aYes-associated  protein
■690    ▼a0758
■690    ▼a0379
■690    ▼a0306
■71020▼aPrinceton  University▼bChemical  and  Biological  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0181
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356926▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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