본문

서브메뉴

Identification of a Homeostatic Stem Cell Population in the Intestinal Upper Crypt
Identification of a Homeostatic Stem Cell Population in the Intestinal Upper Crypt
Identification of a Homeostatic Stem Cell Population in the Intestinal Upper Crypt

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211152005
ISBN  
9798383046906
DDC  
574
저자명  
Capdevila Castillo, Claudia.
서명/저자  
Identification of a Homeostatic Stem Cell Population in the Intestinal Upper Crypt
발행사항  
[Sl] : Columbia University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
180 p
주기사항  
Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
주기사항  
Includes supplementary digital materials.
주기사항  
Advisor: Yan, Kelley.
학위논문주기  
Thesis (Ph.D.)--Columbia University, 2024.
초록/해제  
요약In the prevailing model, R-spondin (Rspo)-dependent Lgr5+ crypt base columnar (CBC) cells are the only dedicated intestinal stem cells (ISCs) that sustain epithelial regeneration during homeostasis by upward migration of their progeny through an elusive transit-amplifying (TA) intermediate in the upper crypt. Paradoxically, the intestinal epithelium is resilient to Lgr5+ CBC cell loss. Elicited by intriguing R-spondin (Rspo) gain- and loss-of-function phenotypes that suggest regeneration emerges from a subset of Lgr5- cells, here we combine single-cell RNA-sequencing (scRNA-seq) with time-resolved fate mapping to identify a proliferative population of multi-potent upper crypt cells in the putative location of TA cells. Distinct from the Lgr5+ CBC cells and marked by expression of Fgfbp1 - a gene which we demonstrate is essential for regeneration - these cells generate progeny that migrate bi-directionally along the crypt-villus axis and, unexpectedly, also serve as a source for the Lgr5+ cells at the base. Fgfbp1+ cells are resilient to Rspo signaling blockade and sustain epithelial homeostasis in the context of Lgr5+ cell loss, suggesting functional independence. Consistent with their stem rather than TA cell function, our results point to the existence of a novel cellular hierarchy in the intestinal epithelium, contesting the regenerative capabilities of the Lgr5+ CBC cell and helping reconcile many of the Lgr5+ CBC model inconsistencies.
일반주제명  
Cellular biology
일반주제명  
Developmental biology
일반주제명  
Medicine
키워드  
Intestinal stem cell
키워드  
Regeneration
키워드  
Transit amplifying
키워드  
Crypt base columnar
키워드  
Intestinal epithelium
기타저자  
Columbia University Genetics and Development
기본자료저록  
Dissertations Abstracts International. 85-12B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008250123s2024        us                              c    eng  d
■001000017162377
■00520250211152005
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798383046906
■035    ▼a(MiAaPQ)AAI31330436
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574
■1001  ▼aCapdevila  Castillo,  Claudia.
■24510▼aIdentification  of  a  Homeostatic  Stem  Cell  Population  in  the  Intestinal  Upper  Crypt
■260    ▼a[Sl]▼bColumbia  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a180  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-12,  Section:  B.
■500    ▼aIncludes  supplementary  digital  materials.
■500    ▼aAdvisor:  Yan,  Kelley.
■5021  ▼aThesis  (Ph.D.)--Columbia  University,  2024.
■520    ▼aIn  the  prevailing  model,  R-spondin  (Rspo)-dependent  Lgr5+  crypt  base  columnar  (CBC)  cells  are  the  only  dedicated  intestinal  stem  cells  (ISCs)  that  sustain  epithelial  regeneration  during  homeostasis  by  upward  migration  of  their  progeny  through  an  elusive  transit-amplifying  (TA)  intermediate  in  the  upper  crypt.  Paradoxically,  the  intestinal  epithelium  is  resilient  to  Lgr5+  CBC  cell  loss.  Elicited  by  intriguing  R-spondin  (Rspo)  gain-  and  loss-of-function  phenotypes  that  suggest  regeneration  emerges  from  a  subset  of  Lgr5-  cells,  here  we  combine  single-cell  RNA-sequencing  (scRNA-seq)  with  time-resolved  fate  mapping  to  identify  a  proliferative  population  of  multi-potent  upper  crypt  cells  in  the  putative  location  of  TA  cells.  Distinct  from  the  Lgr5+  CBC  cells  and  marked  by  expression  of  Fgfbp1  -  a  gene  which  we  demonstrate  is  essential  for  regeneration  -  these  cells  generate  progeny  that  migrate  bi-directionally  along  the  crypt-villus  axis  and,  unexpectedly,  also  serve  as  a  source  for  the  Lgr5+  cells  at  the  base.  Fgfbp1+  cells  are  resilient  to  Rspo  signaling  blockade  and  sustain  epithelial  homeostasis  in  the  context  of  Lgr5+  cell  loss,  suggesting  functional  independence.  Consistent  with  their  stem  rather  than  TA  cell  function,  our  results  point  to  the  existence  of  a  novel  cellular  hierarchy  in  the  intestinal  epithelium,  contesting  the  regenerative  capabilities  of  the  Lgr5+  CBC  cell  and  helping  reconcile  many  of  the  Lgr5+  CBC  model  inconsistencies.
■590    ▼aSchool  code:  0054.
■650  4▼aCellular  biology
■650  4▼aDevelopmental  biology
■650  4▼aMedicine
■653    ▼aIntestinal  stem  cell
■653    ▼aRegeneration
■653    ▼aTransit  amplifying
■653    ▼aCrypt  base  columnar
■653    ▼aIntestinal  epithelium
■690    ▼a0379
■690    ▼a0758
■690    ▼a0564
■71020▼aColumbia  University▼bGenetics  and  Development.
■7730  ▼tDissertations  Abstracts  International▼g85-12B.
■790    ▼a0054
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162377▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

Preview

Export

ChatGPT Discussion

AI Recommended Related Books


    New Books MORE
    Statistics for the past 3 years. Go to brief

    ค้นหาข้อมูลรายละเอียด

    • จองห้องพัก
    • ไม่อยู่
    • โฟลเดอร์ของฉัน
    • ขอดูแรก
    • Non-Book Loan Application
    • Nighttime Book Loan Application
    วัสดุ
    Reg No. Call No. ตำแหน่งที่ตั้ง สถานะ ยืมข้อมูล
    TF10639 전자도서 대출가능 My Folder 부재도서신고 비도서대출신청 야간 도서대출신청

    * จองมีอยู่ในหนังสือยืม เพื่อให้การสำรองที่นั่งคลิกที่ปุ่มจองห้องพัก

    Books borrowed together with this book

    Related Popular Books

    Available after logging in.