Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Single-cell transcriptomic analysis unveils the diversity within mammalian spinal motor neurons

ABSTRACT: Spinal motor neurons (MNs) integrate sensory stimuli and brain commands to generate movements. In vertebrates, the molecular identities of the cardinal MN types such as those innervating limb versus trunk muscles have been well elucidated. Yet the identities of finer subtypes within these cell populations that innervate individual muscle groups remain enigmatic. Using single-cell transcriptomics, we have investigated heterogeneity in mouse MNs and discovered many unreported MN subtypes. Among limb-innervating MNs, we reveal a surprisingly diverse neuropeptide code for delineating putative motor pool identities. Additionally, we have uncovered that axial MNs are subdivided into three molecularly distinct subtypes, defined by mediolaterally-biased Satb2, Nr2f2 or Bcl11b expression patterns with different axon guidance signatures. These three subtypes are present in chicken and human embryos, suggesting a conserved axial MN expression pattern across higher vertebrates. Overall, our study provides a comprehensive molecular resource of spinal MN types and paves the way towards deciphering how neuronal subtypes evolved to accommodate vertebrate motor behaviors associated with different lifestyles.

ORGANISM(S): Mus musculus

PROVIDER: GSE183759 | GEO | 2022/11/18

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Multimodal Hox5 activity generates motor neuron diversity [ChIP-seq]

Project description:Motor neurons (MNs) are the final output of circuits driving fundamental behaviors, such as respiration and locomotion. Hox proteins are essential in generating the MN diversity required for accomplishing these functions, but the transcriptional mechanisms that enable Hox paralogs to assign distinct MN subtype identities despite their promiscuous DNA binding motif are not well understood. Here we show that Hoxa5 can modify chromatin accessibility in all mouse spinal cervical MN subtypes and engages TALE co-factors to directly bind and regulate subtype-specific genes. We identify a paralog-specific interaction of Hoxa5 with the phrenic MN-specific transcription factor Scip and show that heterologous expression of Hoxa5 and Scip is sufficient to suppress limb-innervating MN identity. We also demonstrate that phrenic MN identity is stable after Hoxa5 downregulation and identify Klf proteins as potential regulators of phrenic MN maintenance. Our data identify multiple modes of Hoxa5 action that converge to induce and maintain MN identity.

2024-08-12 | GSE273363 | GEO

Multimodal Hox5 activity generates motor neuron diversity [ATAC-seq]

2024-08-12 | GSE273362 | GEO

Multimodal Hox5 activity generates motor neuron diversity [RNA-seq]

2024-08-12 | GSE273364 | GEO

Accelerated high-yield generation of limb-innervating motor neurons from human stem cells

Project description:Human pluripotent stem cells are a promising source of diverse cells for developmental studies, cell transplantation, disease modeling, and drug testing. However, their widespread use even for intensely studied cell types like spinal motor neurons, is hindered by the long duration and low yields of existing protocols for in vitro differentiation and by the molecular heterogeneity of the populations generated. We report a combination of small molecules that induce up to 50% motor neurons within 3 weeks from human pluripotent stem cells with defined subtype identities that are relevant to neurodegenerative diseases. Despite their accelerated differentiation, motor neurons expressed combinations of HB9, ISL1 and column-specific markers that mirror those observed in vivo in human fetal spinal cord. They also exhibited spontaneous and induced activity, and projected axons towards muscles when grafted into developing chick spinal cord. Strikingly, this novel protocol preferentially generates motor neurons expressing markers of limb-innervating lateral motor column motor neurons (FOXP1+/LHX3-). Access to high-yield cultures of human limb-innervating motor neuron subtypes will facilitate in-depth study of motor neuron subtype-specific properties, disease modeling, and development of large-scale cell-based screening assays. We analyze 3 samples including 2 positive samples and 1 negative sample. Descriptions are as follow: a) Positive Sample 1: SHH-derived, day 21 GFP-high FACS purified motor neurons.b) Positive Sample 2: S+P-derived, day 21 GFP-high FACS purified motor neurons. c) Negative: S+P condition, day 21 no GFP FACS purified motor neurons

2013-02-06 | E-GEOD-41795 | biostudies-arrayexpress

Determinants of Motor Neuron Functional Subtypes Important for Locomotor Speed

Project description:Locomotion requires precise control of the strength and speed of muscle contraction and is achieved by recruiting functionally-distinct subtypes of motor neurons (MNs). MNs are essential to movement and differentially susceptible in disease, but little is known about how MNs acquire functional subtype-specific features during development. Using single-cell RNA profiling in embryonic and larval zebrafish, we identify novel and conserved molecular signatures for MN functional subtypes, and identify genes expressed in both early post-mitotic and mature MNs. Assessing MN development in genetic mutants, we define a molecular program essential for MN functional subtype specification. Two evolutionarily-conserved transcription factors, Prdm16 and Mecom, are both functional subtype-specific determinants integral for fast MN development. Loss of prdm16 or mecom causes fast MNs to develop transcriptional profiles and innervation similar to slow MNs. These results reveal the molecular diversity of vertebrate axial MNs and demonstrate that functional subtypes are specified through intrinsic transcriptional codes.

2023-08-24 | GSE240026 | GEO

Diversification of posterior Hox patterning by graded ability to engage inaccessible chromatin [RNA-seq]

Project description:While Hox genes encode for similar transcription factors (TFs), they induce different fates across body axes. We sought to understand how Hox TF genomic binding preferences relate to their patterning activities during neuronal differentiation. To generate the required neuronal diversity for locomotor activity, Hox TFs specify spinal motor neuron and interneuron subtypes along the rostro-caudal axis. Our data revelated that Hoxc6 and Hoxc8 of the central group induce limb-innervating fates by binding to the same sites. On the other hand, the posterior group Hox genes assign different positional identities: Hoxc9 (thoracic), Hoxc10 (limb-innervating) and Hox13 (axial elongation termination) by binding to distinct sites with the same primary motif. We find that their genomic binding distributions are explained by differential abilities to bind to previously inaccessible chromatin. Thus, the vertebrate posterior Hox expansion and its associated patterning diversification is the product of their differential abilities to associate with less accessible chromatin.

2020-09-06 | GSE142378 | GEO

Diversification of posterior Hox patterning by graded ability to engage inaccessible chromatin [ChIP-seq]

2020-09-06 | GSE142377 | GEO

Diversification of posterior Hox patterning by graded ability to engage inaccessible chromatin [ATAC-seq]

2020-09-06 | GSE142375 | GEO

Accelerated high-yield generation of limb-innervating motor neurons from human stem cells

2013-02-06 | GSE41795 | GEO

Genomewide screening for pectoral fin MN specific markers

Project description:The goal of this study is to find skate pectoral fin motor neuron markers. Total RNA was extracted from manually sorted pectoral fin MNs, which were retrogradely labeled and tail spinal cord cells. By comparing RNA expression profiles of pectoral fin MNs and tail spinal cord neurons, we could identity general MN, MN columnar, and subset MN pool markers for fin MNs.

2018-02-08 | GSE105156 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data