Cited by 104Developmental Biology and Gene RegulationNeurogenesis and neuroplasticity mechanismsCongenital gastrointestinal and neural anomalies

Distinct transcriptomes define rostral and caudal serotonin neurons

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Wylie, Christi J., Hendricks, Timothy J., Zhang, Bing, Wang, Lily, Lu, Pengcheng, Leahy, Patrick, Fox, Stephanie, Maeno, Hiroshi +1 more·2010·The Journal of Neuroscience

Abstract

The molecular architecture of developing serotonin (5HT) neurons is poorly understood, yet its determination is likely to be essential for elucidating functional heterogeneity of these cells and the contribution of serotonergic dysfunction to disease pathogenesis. Here, we describe the purification of postmitotic embryonic 5HT neurons by flow cytometry for whole-genome microarray expression profiling of this unitary monoaminergic neuron type. Our studies identified significantly enriched expression of hundreds of unique genes in 5HT neurons, thus providing an abundance of new serotonergic markers. Furthermore, we identified several hundred transcripts encoding homeodomain, axon guidance, cell adhesion, intracellular signaling, ion transport, and imprinted genes associated with various neurodevelopmental disorders that were differentially enriched in developing rostral and caudal 5HT neurons. These findings suggested a homeodomain code that distinguishes rostral and caudal 5HT neurons. Indeed, verification studies demonstrated that Hmx homeodomain and Hox gene expression defined an Hmx(+) rostral subtype and Hox(+) caudal subtype. Expression of engrailed genes in a subset of 5HT neurons in the rostral domain further distinguished two subtypes defined as Hmx(+)En(+) and Hmx(+)En(-). The differential enrichment of gene sets for different canonical pathways and gene ontology categories provided additional evidence for heterogeneity between rostral and caudal 5HT neurons. These findings demonstrate a deep transcriptome and biological pathway duality for neurons that give rise to the ascending and descending serotonergic subsystems. Our databases provide a rich, clinically relevant resource for definition of 5HT neuron subtypes and elucidation of the genetic networks required for serotonergic function.

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Crossref · 10.1523/jneurosci.4656-09.2010

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  • Systematic analysis and integration of multiple cellular characteristics at single-cell resolution within each raphe nucleus is still lacking.

    “Pioneering work has introduced the molecular diversity of serotonin neurons across the midbrain and hindbrain (Okaty et al., 2015; Spaethling et al., 2014; Wylie et al., 2010), yet systematic analysis and integration of multiple cellular characteristics at single-cell resolution within each raphe nucleus is still lacking.”

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Authors
Wylie, C. J., Hendricks, T. J., Zhang, B., Wang, L., Lu, P., Leahy, P., Fox, S., Maeno, H., & Deneris, E. S.
Affiliations
  • Case Western Reserve University (US)
  • Salk Institute for Biological Studies (US)
  • Vanderbilt University (US)
  • Case Comprehensive Cancer Center (US)
Venue
The Journal of Neuroscience
Published
2010-01-13
Volume
30
Issue
2
Pages
670-684
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2041052894
Cited by
104
References
71
Citations by year
2026: 4 · 2025: 1 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 5 · 2019: 5 · 2018: 7 · 2017: 11 · 2016: 7 · 2015: 8 · 2014: 13 · 2013: 9 · 2012: 10
FWCI
4.95
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Vanderbilt University
  • Case Western Reserve University
  • National Institute of Mental Health (P50MH078028, MH078028, R01MH062723)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Health Sciences › Medicine › Surgery › Congenital gastrointestinal and neural anomalies
Keywords
serotonergic neurons, neuronal heterogeneity, Hox genes, engrailed, axon guidance, cell adhesion, neurodevelopmental disorders, transcriptome
MeSH terms
Age Factors, Analysis of Variance, Animals, Bacterial Proteins, Embryo, Mammalian, Flow Cytometry, Luminescent Proteins, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Rhombencephalon, Serotonin, Cluster Analysis, Homeodomain Proteins, Gene Expression Regulation, Developmental, Computational Biology, Oligonucleotide Array Sequence Analysis, Gene Expression Profiling, Mice

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