Cited by 186Alzheimer's disease research and treatmentsRNA Research and SplicingAmyotrophic Lateral Sclerosis Research

Tau isoform regulation is region‐ and cell‐specific in mouse brain

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McMillan, Pamela, Korvatska, Elena, Poorkaj, Parvoneh, Evstafjeva, Zana, Robinson, Linda, Greenup, Lynne, Leverenz, James, Schellenberg, Gerard D. +1 more·2008·Journal of Comparative Neurology

Abstract

Tau is a microtubule‐associated protein implicated in neurodegenerative tauopathies. Alternative splicing of the tau gene (MAPT) generates six tau isoforms, distinguishable by the exclusion or inclusion of a repeat region of exon 10, which are referred to as 3‐repeat (3R) and 4‐repeat (4R) tau, respectively. We developed transgenic mouse models that express the entire human MAPT gene in the presence and absence of the mouse Mapt gene and compared the expression and regulation of mouse and human tau isoforms during development and in the young adult. We found differences between mouse and human tau in the regulation of exon 10 inclusion. Despite these differences, the isoform splicing pattern seen in normal human brain is replicated in our mouse models. In addition, we found that all tau, both in the neonate and young adult, is phosphorylated. We also examined the normal anatomic distribution of mouse and human tau isoforms in mouse brain. We observed developmental and species‐specific variations in the expression of 3R‐ and 4R‐tau within the frontal cortex and hippocampus. In addition, there were differences in the cellular distribution of the isoforms. Mice transgenic for the human MAPT gene exhibited higher levels of neuronal cell body expression of tau compared to wildtype mice. This neuronal cell body expression of tau was limited to the 3R isoform, whereas expression of 4R‐tau was more “synaptic like,” with granular staining of neuropil rather than in neuronal cell bodies. These developmental and species‐specific differences in the regulation and distribution of tau isoforms may be important to the understanding of normal and pathologic tau isoform expression. J. Comp. Neurol. 511:788–803, 2008. © 2008 Wiley‐Liss, Inc.

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  • Adult human and rat brains express both 3R and 4R Tau isoforms, whereas adult mouse brains express only 4R tau.

    “Adult human and rat brains express both 3R and 4R Tau isoforms [28]: in contrast, adult mouse brains express only 4R tau [29]”

    From Analysis of early effects of human APOE isoforms on Alzheimer’s disease and type III hyperlipoproteinemia pathways using knock-in rat models with humanized APP and APOE (2024) · cites this paper as [29]

    Citation [29] is attached to the claim about adult mice, not the preceding claim about humans and rats. The Discussion says 4R-tau becomes the predominant isoform in adult mice, but the Results (Immunohistochemistry of WT mice; page unavailable) detect 3R-tau in the subgranular zone of P90 mice. Thus, “only 4R” overstates the finding. (LLM, conf=0.91)

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Authors
McMillan, P., Korvatska, E., Poorkaj, P., Evstafjeva, Z., Robinson, L., Greenup, L., Leverenz, J., Schellenberg, G. D., & D'Souza, I.
Affiliations
  • University of Washington (US)
  • VA Puget Sound Health Care System (US)
Corresponding author
Schellenberg, Gerard D.
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2008-10-29
Volume
511
Issue
6
Pages
788-803
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2034520943
Cited by
179
References
90
Citations by year
2026: 6 · 2025: 12 · 2024: 14 · 2023: 9 · 2022: 11 · 2021: 18 · 2020: 13 · 2019: 16 · 2018: 9 · 2017: 10 · 2016: 10 · 2015: 14 · 2014: 7 · 2013: 10 · 2012: 7
FWCI
2.94
Type
journal article
Language
en
Open access
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Aging (P01 AG-17586, P01AG017586, R37AG011762, P50AG005136, R37 AG11762-10)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
Keywords
tau protein, tau isoforms, alternative splicing, MAPT, transgenic mouse model, tau phosphorylation, brain development, species differences, frontal cortex, hippocampus, neuronal cell bodies, synaptic distribution, tauopathy
MeSH terms
Aging, Animals, Animals, Newborn, Brain, Exons, Frontal Lobe, Hippocampus, Humans, Mice, Transgenic, Neurons, Phosphorylation, Species Specificity, Synaptic Membranes, tau Proteins, Gene Expression Regulation, Developmental, Protein Isoforms, Mice

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