Cited by 166Neurobiology and Insect Physiology ResearchNeurogenesis and neuroplasticity mechanismsDevelopmental Biology and Gene Regulation

Systematic analysis of neural projections reveals clonal composition of the Drosophila brain

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Ito, Masayoshi, Masuda, Naoki, Shinomiya, Kazunori, Endo, Keita, Ito, Kei·2013·Current Biology

Abstract

Background During development neurons are generated by sequential divisions of neural stem cells, or neuroblasts. In the insect brain progeny of certain stem cells form lineage-specific sets of projections that arborize in distinct brain regions, called clonal units. Though this raises the possibility that the entire neural network in the brain might be organized in a clone-dependent fashion, only a small portion of clones has been identified. Results Using Drosophila melanogaster, we randomly labeled one of about 100 stem cells at the beginning of the larval stage, analyzed the projection patterns of their progeny in the adult, and identified 96 clonal units in the central part of the fly brain, the cerebrum. Neurons of all the clones arborize in distinct regions of the brain, though many clones feature heterogeneous groups of neurons in terms of their projection patterns and neurotransmitters. Arborizations of clones overlap preferentially to form several groups of closely associated clones. Fascicles and commissures were all made by unique sets of clones. Whereas well-investigated brain regions such as the mushroom body and central complex consist of relatively small numbers of clones and are specifically connected with a limited number of neuropils, seemingly disorganized neuropils surrounding them are composed by a much larger number of clones and have extensive specific connections with many other neuropils. Conclusions Our study showed that the insect brain is formed by a composition of cell-lineage-dependent modules. Clonal analysis reveals organized architecture even in those neuropils without obvious structural landmarks.

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Crossref · 10.1016/j.cub.2013.03.015

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  • Our lineage-associated tracts have been mapped by light microscopy and assigned to named lineage clones.

    “Our lineage-associated tracts have been mapped by light microscopy and assigned to named lineage clones.139,199,200,201,202”
  • From light-level data that labels a whole lineage and all of its hemilineages together, it is occasionally difficult to assess whether there is a single hemilineage or multiple if the cell body clusters do not separate sufficiently.

    “From light-level data that labels a whole lineage and all of its hemilineages together,139,199,200,201 it is occasionally difficult to assess whether there is a single hemilineage or multiple, if the cell body clusters happen to not separate sufficiently.”
  • Previous literature expected a total of around 119 lineages in the central brain, including the gnathal ganglia (GNG).

    “From previous literature, we expected a total of around 119 lineages in the central brain, including the gnathal ganglia (GNG)31–34,84.”
  • The following lineages are new to the Ito/Lee nomenclature: CREl1/DALv3, LHp3/CP5, DILP/DILP, LALa1/BAlp2, SMPpm1/DPMm2 and VLPl5/BLVa3_or_4.

    “new to refs. 33,34 (ItoLee nomenclature) are: CREl1/DALv3, LHp3/CP5, DILP/DILP, LALa1/BAlp2, SMPpm1/DPMm2 and VLPl5/BLVa3_or_4”
  • The AOTUv1_ventral/DALcm2_ventral hemilineage seems to be missing in the AOTUv1/DALcm2 clone in the Ito collection.

    “For example, the AOTUv1_ventral/DALcm2_ventral hemilineage seems to be missing in the AOTUv1/DALcm2 clone in the Ito collection33.”

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Authors
Ito, M., Masuda, N., Shinomiya, K., Endo, K., & Ito, K.
Affiliations
The University of Tokyo (JP)
Corresponding author
Ito, Kei
Venue
Current Biology
Publisher
Elsevier BV
Published
2013-04
Volume
23
Issue
8
Pages
644-655
ISSN
0960-9822 (ISSN-L)
OpenAlex
W2005735307
Cited by
166
References
9
Citations by year
2026: 7 · 2025: 9 · 2024: 9 · 2023: 18 · 2022: 7 · 2021: 8 · 2020: 15 · 2019: 11 · 2018: 8 · 2017: 23 · 2016: 11 · 2015: 12 · 2014: 20 · 2013: 8
FWCI
8.31
Type
journal article
Language
en
Open access
Locations
  • Current Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Core Research for Evolutional Science and Technology
  • Ministry of Education, Culture, Sports, Science and Technology
  • Japan Science and Technology Agency
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
neural stem cells, neuroblast lineage, Drosophila melanogaster brain, cerebrum, neuronal projections, axonal arborization, commissures, mushroom body, central complex, neuropil
MeSH terms
Animals, Brain, Clone Cells, Drosophila melanogaster, Female, Larva, Microscopy, Confocal, Cell Lineage, Neuropil, Neural Stem Cells

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