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Drivers of Astrocytic Tau Pathology in 4R Tauopathies- [electronic resource]
Drivers of Astrocytic Tau Pathology in 4R Tauopathies - [electronic resource]
Contents Info
Drivers of Astrocytic Tau Pathology in 4R Tauopathies- [electronic resource]
Material Type  
 단행본
 
0016931680
Date and Time of Latest Transaction  
20240214100102
ISBN  
9798379785451
DDC  
616
Author  
Fiock, Kimberly Lynn.
Title/Author  
Drivers of Astrocytic Tau Pathology in 4R Tauopathies - [electronic resource]
Publish Info  
[S.l.]: : The University of Iowa., 2023
Publish Info  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
Material Info  
1 online resource(152 p.)
General Note  
Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
General Note  
Advisor: Hefti, Marco.
학위논문주기  
Thesis (Ph.D.)--The University of Iowa, 2023.
Restrictions on Access Note  
This item must not be sold to any third party vendors.
Abstracts/Etc  
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.
Subject Added Entry-Topical Term  
Pathology.
Subject Added Entry-Topical Term  
Neurosciences.
Subject Added Entry-Topical Term  
Biochemistry.
Index Term-Uncontrolled  
FTLD-tau
Index Term-Uncontrolled  
Reactive astrocytes
Index Term-Uncontrolled  
Stem cells
Index Term-Uncontrolled  
Tau
Index Term-Uncontrolled  
Alzheimer's disease
Index Term-Uncontrolled  
Neuroprotective
Added Entry-Corporate Name  
The University of Iowa Pathology
Host Item Entry  
Dissertations Abstracts International. 85-01B.
Host Item Entry  
Dissertation Abstract International
Electronic Location and Access  
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소장사항  
202402 2024
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