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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
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103102
- ISBN
- 9798280752535
- DDC
- 574
- 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
- Embryo
- 키워드
- Preimplantation
- 기타저자
- Princeton University Chemical and Biological Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798280752535
■035 ▼a(MiAaPQ)AAI31934745
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574
■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.


