Cited by 368Neurogenesis and neuroplasticity mechanismsDevelopmental Biology and Gene RegulationCongenital gastrointestinal and neural anomalies

The homeodomain factor Lbx1 distinguishes two major programs of neuronal differentiation in the dorsal spinal cord

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Müller, Thomas, Brohmann, Henning, Pierani, Alessandra, Heppenstall, Paul A., Lewin, Gary R., Jessell, Thomas M., Birchmeier, Carmen·2002·Neuron

Abstract

Dorsal horn neurons in the spinal cord integrate and relay sensory information. Here, we show that the expression of the homeobox gene Lbx1 distinguishes two major neuronal classes generated in the dorsal spinal cord. The Lbx1(-) (class A) and Lbx1(+) (class B) neurons differ in their dependence on roof plate BMP signals for specification and settle in the deep and superficial dorsal horn, respectively. Lbx1 misexpression blocks the differentiation of class A neurons. Conversely, in Lbx1 mutant mice, class B neurons assume the identity of class A neurons. As a consequence, the morphology and neuronal circuitry of the dorsal horn are aberrant. We conclude that Lbx1 distinguishes two major neuronal classes in the dorsal spinal cord and is an important determinant of their distinct differentiation programs.

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Crossref · 10.1016/s0896-6273(02)00689-x

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  • The increase in dI4 and dI5 neurons is explained by the expansion of the combined dp4/dp5 progenitor pool in the dorsal spinal cord at these stages and the extended phase of neurogenesis in the dorsal spinal cord that results in late born dI4 and dI5 neurons.

    “This is explained by the expansion of the combined dp4/dp5 progenitor pool in the dorsal spinal cord at these stages and the extended phase of neurogenesis in the dorsal spinal cord that results in the formation of late born dI4 and dI5 neurons”
  • The decrease in dorsal progenitors at e13.5 is in line with the higher rate of neurogenesis in the dorsal spinal cord at e13.5 and the consequent depletion of progenitors.

    “This is in line with the higher rate of neurogenesis in the dorsal spinal cord at e13.5 and the consequent depletion of progenitors”
  • A subset of cells from the dorsal dI4.6/dI6 lineages contributed to most ventral inhibitory populations.

    “A subset of cells from the dorsal dI4.6/dI6 lineages contributed to most ventral inhibitory populations, which was unexpected though there have been reports of scattered dI4 Ptf1a-derived cells in the embryonic and perinatal ventral horn103,104, and the very small dI6 population is known to be ventrally located105–107.”

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Authors
Müller, T., Brohmann, H., Pierani, A., Heppenstall, P. A., Lewin, G. R., Jessell, T. M., & Birchmeier, C.
Affiliations
  • Max Delbrück Center (DE)
  • Howard Hughes Medical Institute (US)
Corresponding author
Birchmeier, Carmen
Venue
Neuron
Publisher
Elsevier BV
Published
2002-05
Volume
34
Issue
4
Pages
551-562
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2139909837
Cited by
368
References
43
Citations by year
2026: 12 · 2025: 6 · 2024: 10 · 2023: 19 · 2022: 15 · 2021: 15 · 2020: 17 · 2019: 16 · 2018: 18 · 2017: 15 · 2016: 14 · 2015: 11 · 2014: 13 · 2013: 26 · 2012: 17
FWCI
4.64
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • MDC Repository (Max-Delbrueck-Center for Molecular Medicine) (submittedVersion)
  • SDL (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • Bundesministerium für Bildung und Frauen
  • Howard Hughes Medical Institute
  • National Institute of Neurological Disorders and Stroke
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Health Sciences › Medicine › Surgery › Congenital gastrointestinal and neural anomalies
Keywords
Lbx1, homeobox genes, dorsal horn neurons, spinal cord, neuronal differentiation, roof plate, BMP signaling, sensory neurons, neuronal identity
MeSH terms
Afferent Pathways, Animals, Axons, Cell Differentiation, Chick Embryo, DNA-Binding Proteins, Mice, Mutant Strains, Mitosis, Muscle Proteins, Mutation, Nervous System Malformations, Spinal Nerve Roots, Stem Cells, Transcription Factors, Homeodomain Proteins, Gene Expression Regulation, Developmental, Cell Lineage, Body Patterning, Posterior Horn Cells, Avian Proteins, Animals, Genetically Modified, Mice, PAX7 Transcription Factor, Basic Helix-Loop-Helix Proteins

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