Cited by 329Neurogenesis and neuroplasticity mechanismsPluripotent Stem Cells ResearchDevelopmental Biology and Gene Regulation

Revisiting astrocyte to neuron conversion with lineage tracing in vivo

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Wang, Lei-Lei, Serrano, Carolina, Zhong, Xiaoling, Ma, Shuaipeng, Zou, Yuhua, Zhang, Chun-Li·2021·Cell

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Abstract

In vivo cell fate conversions have emerged as potential regeneration-based therapeutics for injury and disease. Recent studies reported that ectopic expression or knockdown of certain factors can convert resident astrocytes into functional neurons with high efficiency, region specificity, and precise connectivity. However, using stringent lineage tracing in the mouse brain, we show that the presumed astrocyte-converted neurons are actually endogenous neurons. AAV-mediated co-expression of NEUROD1 and a reporter specifically and efficiently induces reporter-labeled neurons. However, these neurons cannot be traced retrospectively to quiescent or reactive astrocytes using lineage-mapping strategies. Instead, through a retrograde labeling approach, our results reveal that endogenous neurons are the source for these viral-reporter-labeled neurons. Similarly, despite efficient knockdown of PTBP1 in vivo, genetically traced resident astrocytes were not converted into neurons. Together, our results highlight the requirement of lineage-tracing strategies, which should be broadly applied to studies of cell fate conversions in vivo.

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  • Some reported conversions reflected viral promoter leakage into pre-existing neurons.

    “However, subsequent lineage-tracing studies yielded conflicting results, suggesting that PTBP1 depletion alone may be insufficient to drive genuine astrocyte-to-neuron conversion in the adult mammalian brain, raising concerns that some reported conversions reflected viral promoter leakage into pre-existing neurons.”
  • Subsequent lineage-tracing studies yielded conflicting results, suggesting that PTBP1 depletion alone may be insufficient to drive genuine astrocyte-to-neuron conversion in the adult mammalian brain.

    “However, subsequent lineage-tracing studies yielded conflicting results, suggesting that PTBP1 depletion alone may be insufficient to drive genuine astrocyte-to-neuron conversion in the adult mammalian brain, raising concerns that some reported conversions reflected viral promoter leakage into pre-existing neurons.”

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Research works printed but not linked: 1

  1. Wang L-L, Garcia CS, Zhong X, Ma S, and Zhang C-L (2020). Rapid and efficient in vivo astrocyte-to-neuron conversion with regional identity and connectivity? bioRxiv, 2020.2008.2016.253195.

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Authors
Wang, L.-L., Serrano, C., Zhong, X., Ma, S., Zou, Y., & Zhang, C.-L.
Affiliations
The University of Texas Southwestern Medical Center (US)
Corresponding author
  • Wang, Lei-Lei
  • Zhang, Chun-Li
Venue
Cell
Publisher
Elsevier BV
Published
2021-10
Volume
184
Issue
21
Pages
5465-5481.e16
ISSN
0092-8674 (ISSN-L)
OpenAlex
W3203538421
Cited by
329
References
65
Citations by year
2026: 30 · 2025: 60 · 2024: 74 · 2023: 68 · 2022: 73 · 2021: 21 · 2020: 3
FWCI
21.49
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Welch Foundation (I-1724)
  • National Institutes of Health (NS099073, NS117065, NS111776, NS092616, NS088095)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
astrocyte-to-neuron conversion, lineage tracing, retrograde tracing, NeuroD1, PTBP1, reactive astrocytes, cell fate conversion, brain regeneration, mouse brain
MeSH terms
Dependovirus, Animals, Astrocytes, Brain, Brain Injuries, Cell Differentiation, Gene Expression Regulation, Glial Fibrillary Acidic Protein, Humans, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Promoter Regions, Genetic, Transcription Factors, Down-Regulation, Genes, Reporter, Homeodomain Proteins, Cell Lineage, Integrases, Heterogeneous-Nuclear Ribonucleoproteins, Polypyrimidine Tract-Binding Protein, Cell Line, Tumor, Mice, Basic Helix-Loop-Helix Transcription Factors, Basic Helix-Loop-Helix Proteins, Cellular Reprogramming

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