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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 Differe...
Keratin-Dependent Regulation of Progenitor Keratinocyte Identity and Commitment to Differentiation

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자료유형  
 학위논문 서양
최종처리일시  
20250211153017
ISBN  
9798384046073
DDC  
574
저자명  
Redmond, Catherine J.
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  
Transcriptional regulation
키워드  
Pathophysiology
기타저자  
University of Michigan Cancer Biology
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
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■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.

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