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Investigating the Function of an Endogenous Retroelement at the Maternal-Fetal Interface
Investigating the Function of an Endogenous Retroelement at the Maternal-Fetal Interface
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105613
- ISBN
- 9798265428226
- DDC
- 791.45
- 저자명
- Bergman, Abby J.
- 서명/저자
- Investigating the Function of an Endogenous Retroelement at the Maternal-Fetal Interface
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 116 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
- 주기사항
- Advisor: Baker, Julie.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약During pregnancy, the placenta is responsible for balancing fetal demand and maternal demise. This conflict has driven a variety of unusual adaptations in the placenta, including the reactivation and co-option of transposable elements (TEs). Despite abundant progress in understanding TEs as functional genetic elements, the landscape of TE expression and their function in the placenta remains underexplored. Previously, TE expression in the placenta was attributed to broad genome hypomethylation. Here, we demonstrate that TEs are not widely expressed. Rather only a few elements contribute to the placental TE transcriptome, among which are the intracisternal a-type particle (IAP) family of long terminal repeat (LTR) elements. IAPs are numerous in the mouse genome and are known have many loci that remain transposition competent. Data presented here indicates that early stem cell lineages repress IAP transposition and that this feature is dispensable for normal placental and embryo development. Importantly, several IAP loci have retained all ancestral gene domains (gag, pol, and env, which give rise to virus-like particles (VLPs) with characteristics of long observed placental VLPs. To investigate a function for full-length IAP elements (hereafter IAPenv), we generated a transgenic mouse with a tagged IAPenv under the Rosa26 locus - the first established transgenic mouse overexpressing a complete TE. Utilizing this model, we show that while decayed IAP expression is restricted to the junctional zone of the placenta, IAPenv is expressed throughout the tissue. Critically, IAPenv transcripts can be found in the adjoining maternal decidua in cases where the maternal genotype does not express the transgene, suggesting that IAPenv is synthesized in the placenta and subsequently trafficked across the maternal-fetal barrier. Further data support the hypothesis that trafficking occurs via formation of virus-like particles (VLPs) by the IAPenv protein, which could be critical mechanism for communication between maternal and fetal tissues. Further understanding of this phenomenon would establish a role for TEs and their VLPs in allogenic cellular communication and is vital for understanding placental function.
- 일반주제명
- Television programs
- 일반주제명
- Placenta
- 일반주제명
- Genomes
- 일반주제명
- Stem cells
- 일반주제명
- Microscopy
- 일반주제명
- Cellular biology
- 일반주제명
- Film studies
- 일반주제명
- Genetics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-05A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■007cr#unu||||||||
■020 ▼a9798265428226
■035 ▼a(MiAaPQ)AAI32316427
■035 ▼a(MiAaPQ)Stanfordsh477pr1216
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a791.45
■1001 ▼aBergman, Abby J.
■24510▼aInvestigating the Function of an Endogenous Retroelement at the Maternal-Fetal Interface
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a116 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: A.
■500 ▼aAdvisor: Baker, Julie.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aDuring pregnancy, the placenta is responsible for balancing fetal demand and maternal demise. This conflict has driven a variety of unusual adaptations in the placenta, including the reactivation and co-option of transposable elements (TEs). Despite abundant progress in understanding TEs as functional genetic elements, the landscape of TE expression and their function in the placenta remains underexplored. Previously, TE expression in the placenta was attributed to broad genome hypomethylation. Here, we demonstrate that TEs are not widely expressed. Rather only a few elements contribute to the placental TE transcriptome, among which are the intracisternal a-type particle (IAP) family of long terminal repeat (LTR) elements. IAPs are numerous in the mouse genome and are known have many loci that remain transposition competent. Data presented here indicates that early stem cell lineages repress IAP transposition and that this feature is dispensable for normal placental and embryo development. Importantly, several IAP loci have retained all ancestral gene domains (gag, pol, and env, which give rise to virus-like particles (VLPs) with characteristics of long observed placental VLPs. To investigate a function for full-length IAP elements (hereafter IAPenv), we generated a transgenic mouse with a tagged IAPenv under the Rosa26 locus - the first established transgenic mouse overexpressing a complete TE. Utilizing this model, we show that while decayed IAP expression is restricted to the junctional zone of the placenta, IAPenv is expressed throughout the tissue. Critically, IAPenv transcripts can be found in the adjoining maternal decidua in cases where the maternal genotype does not express the transgene, suggesting that IAPenv is synthesized in the placenta and subsequently trafficked across the maternal-fetal barrier. Further data support the hypothesis that trafficking occurs via formation of virus-like particles (VLPs) by the IAPenv protein, which could be critical mechanism for communication between maternal and fetal tissues. Further understanding of this phenomenon would establish a role for TEs and their VLPs in allogenic cellular communication and is vital for understanding placental function.
■590 ▼aSchool code: 0212.
■650 4▼aTelevision programs
■650 4▼aPlacenta
■650 4▼aGenomes
■650 4▼aStem cells
■650 4▼aMicroscopy
■650 4▼aCellular biology
■650 4▼aFilm studies
■650 4▼aGenetics
■690 ▼a0379
■690 ▼a0900
■690 ▼a0369
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-05A.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360745▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


