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Drivers of Astrocytic Tau Pathology in 4R Tauopathies- [electronic resource]
Drivers of Astrocytic Tau Pathology in 4R Tauopathies - [electronic resource]
Drivers of Astrocytic Tau Pathology in 4R Tauopathies- [electronic resource]

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자료유형  
 학위논문파일 국외
최종처리일시  
20240214100102
ISBN  
9798379785451
DDC  
616
저자명  
Fiock, Kimberly Lynn.
서명/저자  
Drivers of Astrocytic Tau Pathology in 4R Tauopathies - [electronic resource]
발행사항  
[S.l.]: : The University of Iowa., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(152 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
주기사항  
Advisor: Hefti, Marco.
학위논문주기  
Thesis (Ph.D.)--The University of Iowa, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Toxicity caused by abnormal accumulations of tau protein is the final step in the pathway of many neurodegenerative diseases, including Alzheimer's disease (AD), frontotemporal lobar degeneration (FTLD-tau), chronic traumatic encephalopathy (CTE), and other tauopathies. Though this process has been extensively studied in neurons in the context of AD, the mechanisms that drive this same process in astrocytes, and how that in turn drives diseases like FTLD-tau, remain poorly understood.Using a combination of human tissue and human embryonic stem cell-derived (hESC) astrocytes, we sought to uncover the origin of astrocytic tau in FTLD-tau and the potential candidate mediators of tau accumulation in astrocytes in vitro. We used RNA in situ hybridization and immunofluorescence on cases of AD, PSP, and CBD to compare total amounts of tau mRNA between diseases and between astrocytes with and without tau pathology in PSP. We then used hESC-derived astrocytes to assess their ability to take up and degrade different isoforms of tau.We saw no significant differences in astrocytic tau mRNA expression between diseases with and without astrocytic tau pathology or between individual astrocytes with and without pathology in our PSP cohort. We also found that both control and reactive astrocytes in vitro preferentially take up 4R tau, but only reactive astrocytes exhibit significantly impaired uptake and degradation. Across diseases, astrocytes with tau pathology do not show elevated markers associated with the neurotoxic A1 reactive astrocyte phenotype.Taken together, this data suggests that neuronal and astrocytic tau in FTLD-tau shares a common neuronal origin, and that the preferential uptake and subsequent impaired degradation of 4R tau may explain why 4R accumulation is more common in astrocytes. These results also suggest that tau uptake by astrocytes may have a protective function. Future work focused on characterization of the neuroprotective A2 reactive astrocyte phenotype, in addition to an in-depth exploration of the candidate mediators of tau uptake and degradation, is necessary to further understand the role of astrocytes in FTLD-tau.
일반주제명  
Pathology.
일반주제명  
Neurosciences.
일반주제명  
Biochemistry.
키워드  
FTLD-tau
키워드  
Reactive astrocytes
키워드  
Stem cells
키워드  
Tau
키워드  
Alzheimer's disease
키워드  
Neuroprotective
기타저자  
The University of Iowa Pathology
기본자료저록  
Dissertations Abstracts International. 85-01B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■020    ▼a9798379785451
■035    ▼a(MiAaPQ)AAI30418450
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a616
■1001  ▼aFiock,  Kimberly  Lynn.
■24510▼aDrivers  of  Astrocytic  Tau  Pathology  in  4R  Tauopathies▼h[electronic  resource]
■260    ▼a[S.l.]:▼bThe  University  of  Iowa.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(152  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-01,  Section:  B.
■500    ▼aAdvisor:  Hefti,  Marco.
■5021  ▼aThesis  (Ph.D.)--The  University  of  Iowa,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aToxicity  caused  by  abnormal  accumulations  of  tau  protein  is  the  final  step  in  the  pathway  of  many  neurodegenerative  diseases,  including  Alzheimer's  disease  (AD),  frontotemporal  lobar  degeneration  (FTLD-tau),  chronic  traumatic  encephalopathy  (CTE),  and  other  tauopathies.  Though  this  process  has  been  extensively  studied  in  neurons  in  the  context  of  AD,  the  mechanisms  that  drive  this  same  process  in  astrocytes,  and  how  that  in  turn  drives  diseases  like  FTLD-tau,  remain  poorly  understood.Using  a  combination  of  human  tissue  and  human  embryonic  stem  cell-derived  (hESC)  astrocytes,  we  sought  to  uncover  the  origin  of  astrocytic  tau  in  FTLD-tau  and  the  potential  candidate  mediators  of  tau  accumulation  in  astrocytes  in  vitro.  We  used  RNA  in  situ  hybridization  and  immunofluorescence  on  cases  of  AD,  PSP,  and  CBD  to  compare  total  amounts  of  tau  mRNA  between  diseases  and  between  astrocytes  with  and  without  tau  pathology  in  PSP.  We  then  used  hESC-derived  astrocytes  to  assess  their  ability  to  take  up  and  degrade  different  isoforms  of  tau.We  saw  no  significant  differences  in  astrocytic  tau  mRNA  expression  between  diseases  with  and  without  astrocytic  tau  pathology  or  between  individual  astrocytes  with  and  without  pathology  in  our  PSP  cohort.  We  also  found  that  both  control  and  reactive  astrocytes  in  vitro  preferentially  take  up  4R  tau,  but  only  reactive  astrocytes  exhibit  significantly  impaired  uptake  and  degradation.  Across  diseases,  astrocytes  with  tau  pathology  do  not  show  elevated  markers  associated  with  the  neurotoxic  A1  reactive  astrocyte  phenotype.Taken  together,  this  data  suggests  that  neuronal  and  astrocytic  tau  in  FTLD-tau  shares  a  common  neuronal  origin,  and  that  the  preferential  uptake  and  subsequent  impaired  degradation  of  4R  tau  may  explain  why  4R  accumulation  is  more  common  in  astrocytes.  These results  also  suggest  that  tau  uptake  by  astrocytes  may  have  a  protective  function.  Future  work  focused  on  characterization  of  the  neuroprotective  A2  reactive  astrocyte  phenotype,  in  addition  to  an  in-depth  exploration  of  the  candidate  mediators  of  tau  uptake  and  degradation,  is  necessary  to  further  understand  the  role  of  astrocytes  in  FTLD-tau.
■590    ▼aSchool  code:  0096.
■650  4▼aPathology.
■650  4▼aNeurosciences.
■650  4▼aBiochemistry.
■653    ▼aFTLD-tau
■653    ▼aReactive  astrocytes
■653    ▼aStem  cells
■653    ▼aTau
■653    ▼aAlzheimer's  disease
■653    ▼aNeuroprotective
■690    ▼a0571
■690    ▼a0317
■690    ▼a0487
■71020▼aThe  University  of  Iowa▼bPathology.
■7730  ▼tDissertations  Abstracts  International▼g85-01B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0096
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16931680▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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