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Keratin-Dependent Regulation of Progenitor Keratinocyte Identity and Commitment to Differentiation
Keratin-Dependent Regulation of Progenitor Keratinocyte Identity and Commitment to Differentiation
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153017
- ISBN
- 9798384046073
- DDC
- 574
- 서명/저자
- Keratin-Dependent Regulation of Progenitor Keratinocyte Identity and Commitment to Differentiation
- 발행사항
- [Sl] : University of Michigan, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 245 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: Shah, Yatrik M.
- 학위논문주기
- Thesis (Ph.D.)--University of Michigan, 2024.
- 초록/해제
- 요약Complex epithelia are essential barrier-forming tissues across the body characterized by their expression of cytoskeletal proteins called keratins. Keratins are an expansive family of intermediate filament (IF) forming proteins exhibiting diverse biochemical properties in addition to their highly conserved intermediate filament-forming domains. Keratins are expressed in all vertebrates, epithelia, and developmental timepoints; the expression of specific keratins and their post-translational modifications are tightly regulated in response to developmental stage, differentiation, stress, and disease. Complex epithelial barrier function is maintained throughout life despite constant damaging insults (dehydration, UV radiation, pathogens, etc.) by carefully balancing the proliferation and differentiation of keratin-expressing keratinocytes, the predominant cell type within complex epithelia. The balance between stem-like progenitor keratinocyte identity and function, keratinocyte terminal differentiation and keratinocyte shedding at the tissue surface describes the incompletely understood process of epithelial homeostasis. This thesis describes novel functions for keratin expression and post-translational modifications in the regulation of epithelial homeostasis. In Chapter 1, I review recent impactful research into the diverse contributions of intermediate filaments towards differentiation in numerous cell types and contexts in the body. In Chapter 2, we analyze the transgenic Krt14C373A/C373A mouse to uncover a differentiation-dependent signaling role for a disulfide-bonded form of basally expressed keratin 14 (K14) through the cooperation of the scaffolding protein 14-3-3σ and the transcriptional co-activator YAP1. In Chapter 3, we utilize publicly available single cell RNA-seq (scRNA-seq) datasets to revisit long-established principles of keratin expression domains and transcriptional regulation. Finally, in Chapter 4, we contextualize our K14 discoveries from Chapter 2 into the broader keratin filament network to uncover, for the first time, a role for the additional basally expressed keratin 15 (K15) in the counteraction of the pro-differentiation role of K14 and the promotion of a stem-like progenitor cell identity. In the final Discussion, I put these discoveries into the context of the field of epithelial homeostasis and provide Future Directions to follow up on several key unanswered questions from this thesis. Keratin expression patterning has long been considered simply a consequence of the homeostatic differentiation program. This thesis expands our understanding of the direct contributions of keratin proteins towards the regulation of keratinocyte progenitor identity, terminal differentiation, and ultimately epithelial homeostasis. A greater understanding of epithelial homeostasis from the perspective of keratin proteins can help inform the pathophysiology of numerous diseases induced by a failure of homeostasis, including psoriasis, atopic dermatitis, and squamous cell carcinomas throughout the body.
- 일반주제명
- Cellular biology
- 일반주제명
- Pathology
- 일반주제명
- Molecular biology
- 일반주제명
- Biochemistry
- 키워드
- Keratin
- 키워드
- Differentiation
- 키워드
- Epithelia
- 키워드
- Pathophysiology
- 기타저자
- University of Michigan Cancer Biology
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211153017
■006m o d
■007cr#unu||||||||
■020 ▼a9798384046073
■035 ▼a(MiAaPQ)AAI31631547
■035 ▼a(MiAaPQ)umichrackham005612
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574
■1001 ▼aRedmond, Catherine J.
■24510▼aKeratin-Dependent Regulation of Progenitor Keratinocyte Identity and Commitment to Differentiation
■260 ▼a[Sl]▼bUniversity of Michigan▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a245 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: Shah, Yatrik M.
■5021 ▼aThesis (Ph.D.)--University of Michigan, 2024.
■520 ▼aComplex epithelia are essential barrier-forming tissues across the body characterized by their expression of cytoskeletal proteins called keratins. Keratins are an expansive family of intermediate filament (IF) forming proteins exhibiting diverse biochemical properties in addition to their highly conserved intermediate filament-forming domains. Keratins are expressed in all vertebrates, epithelia, and developmental timepoints; the expression of specific keratins and their post-translational modifications are tightly regulated in response to developmental stage, differentiation, stress, and disease. Complex epithelial barrier function is maintained throughout life despite constant damaging insults (dehydration, UV radiation, pathogens, etc.) by carefully balancing the proliferation and differentiation of keratin-expressing keratinocytes, the predominant cell type within complex epithelia. The balance between stem-like progenitor keratinocyte identity and function, keratinocyte terminal differentiation and keratinocyte shedding at the tissue surface describes the incompletely understood process of epithelial homeostasis. This thesis describes novel functions for keratin expression and post-translational modifications in the regulation of epithelial homeostasis. In Chapter 1, I review recent impactful research into the diverse contributions of intermediate filaments towards differentiation in numerous cell types and contexts in the body. In Chapter 2, we analyze the transgenic Krt14C373A/C373A mouse to uncover a differentiation-dependent signaling role for a disulfide-bonded form of basally expressed keratin 14 (K14) through the cooperation of the scaffolding protein 14-3-3σ and the transcriptional co-activator YAP1. In Chapter 3, we utilize publicly available single cell RNA-seq (scRNA-seq) datasets to revisit long-established principles of keratin expression domains and transcriptional regulation. Finally, in Chapter 4, we contextualize our K14 discoveries from Chapter 2 into the broader keratin filament network to uncover, for the first time, a role for the additional basally expressed keratin 15 (K15) in the counteraction of the pro-differentiation role of K14 and the promotion of a stem-like progenitor cell identity. In the final Discussion, I put these discoveries into the context of the field of epithelial homeostasis and provide Future Directions to follow up on several key unanswered questions from this thesis. Keratin expression patterning has long been considered simply a consequence of the homeostatic differentiation program. This thesis expands our understanding of the direct contributions of keratin proteins towards the regulation of keratinocyte progenitor identity, terminal differentiation, and ultimately epithelial homeostasis. A greater understanding of epithelial homeostasis from the perspective of keratin proteins can help inform the pathophysiology of numerous diseases induced by a failure of homeostasis, including psoriasis, atopic dermatitis, and squamous cell carcinomas throughout the body.
■590 ▼aSchool code: 0127.
■650 4▼aCellular biology
■650 4▼aPathology
■650 4▼aMolecular biology
■650 4▼aBiochemistry
■653 ▼aKeratin
■653 ▼aDifferentiation
■653 ▼aEpithelia
■653 ▼aTranscriptional regulation
■653 ▼aPathophysiology
■690 ▼a0379
■690 ▼a0487
■690 ▼a0307
■690 ▼a0571
■71020▼aUniversity of Michigan▼bCancer Biology.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0127
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164566▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


