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Effect of phox2a knockout on the molecular profiles of hindbrain vestibular neurons in the larval zebrafish (bulk RNA-Seq)

ABSTRACT: Effect of phox2a knockout on the molecular profiles of hindbrain vestibular neurons in the larval zebrafish (bulk RNA-Seq)

PROVIDER: PRJNA1069777 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27747452_1.fastq.gz	Fastqsanger.gz
	SRR27747452_2.fastq.gz	Fastqsanger.gz
	SRR27747453_1.fastq.gz	Fastqsanger.gz
	SRR27747453_2.fastq.gz	Fastqsanger.gz
	SRR27747454_1.fastq.gz	Fastqsanger.gz

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Molecular characterization of hindbrain vestibular neurons in the larval zebrafish (scRNA-Seq)

Project description:The molecular logic that specifies and assembles closely-related subtypes of neurons into functional sensorimotor circuits remains unclear. The goal of this study was to characterize the molecular profiles of hindbrain vestibular neurons in the larval zebrafish to identify candidate molecular programs that specify their subtype fate, topography, and circuit assembly. We used single-cell RNA sequencing to generate a comprehensive atlas of hindbrain vestibular neurons and fluorecent in situ hybridization to annotate profiled neurons. Our dataset serves as a reference for evaluating developmental changes in molecular profiles following perturbations and identifies new candidate molecular solutions that assemble closely-related subtypes into functional circuits.

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Molecular characterization of hindbrain vestibular neurons in the larval zebrafish (scRNA-Seq)

Project description:Molecular characterization of hindbrain vestibular neurons in the larval zebrafish (scRNA-Seq)

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Effect of phox2a knockout on the molecular profiles of hindbrain vestibular neurons in the larval zebrafish (bulk RNA-Seq)

Project description:Sensorimotor reflex circuits engage distinct neuronal subtypes, defined by precise connectivity, to transform sensation into compensatory behavior. Whether and how motor partner populations shape the subtype fate and connectivity of their pre-motor counterparts remains controversial. Here, we discovered that motor partners are dispensable for proper connectivity across an entire vestibular reflex circuit that stabilizes gaze. We first measured activity following vestibular sensation in pre-motor projection neurons after constitutive loss of their extraocular motor neuron partners.We observed normal responses and topography consistent with unchanged functional connectivity between sensory neurons and projection neurons. Next, we show that projection neurons remain anatomically and molecularly poised to connect appropriately with their motor partners. Lastly, we show that the transcriptional signatures of projection neuron subtypes develop independently of motor partners. Our findings comprehensively overturn a long-standing model: that connectivity in the circuit for gaze stabilization is retrogradely determined by motor partner-derived signals. By defining the contribution of motor neurons to canonical sensorimotor circuit assembly, our work speaks to comparable processes in spinal circuits and advances our understanding of general principles of neural development.

2024-01-27 | GSE254345 | GEO

Transcription profiling of rat calyceal vestibular primary afferent neurons (calretinin positive) and dimorphic-bouton vestibular primary afferent neurons (calretinin negative)

Project description:Pooled Immunoflourescent guided laser capture microdisection of calyceal vestibular primary afferent neurons (calretinin positive) and dimorphic-bouton vestibular primary afferent neurons (calretinin negative) were used for microarray expression profiling. Transcription analysis of each of these biologically diverse pools was completed.

2008-05-01 | E-MEXP-1560 | biostudies-arrayexpress

Gene expression profiling of Vglut2 neurons in the vestibular nucleus (VN)

Project description:Vestibular nuclei (VN) are critical for the processing of movement input, and motion-induced activation of VN neurons recapitulates MS-related signs. However, the genetic identity of VN neurons mediating MS-related autonomic and aversive responses remains unknown. Here, we identify diferent markers of glutamatergic vestibular neuronal populations using the RiboTag apparoach.

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Project description:identification of differentially expressed genes in gas6 homozygous mutant hindbrain when compared to wildtype hindbrain in zebrafish

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Effer/Affer Interaction in Vestibular Caliceal vs. Dimorphic and Bouton Primary Afferent Neurons

Project description:The functional diversity of neuropeptides and/or their receptors may provide a complex means to modulate vestibular primary afferent neuronal function. The precise role of these neuropeptides in the physiology of the vestibular neuroepithelium is poorly understood. The vestibular caliceal afferent neurons when compared to the dimorphic and bouton afferent neurons have different functional properties. Immunofluorescent laser capture microdissection utilizing calretinin (calbindin 2, Calb2) antibodies allowed selective acquisition of these two primary afferent neuronal populations from the rat (Rattus norvegicus). After capturing the caliceal afferent neurons, as well as the dimorphic and bouton afferent neurons, microarray expression profiling was completed. Analysis of the resulting data revealed that there were 732 genes involved in synaptic/signaling, calcium binding/solute transport, and other. Of those genes, 52 were related to afferent modulation, including 21 genes representing neuropeptides or their receptors. The observed expression of 52 genes related to afferent modulation identified using microarray were confirmed using PCR from the Wackym-Soares normalized rat vestibular periphery cDNA library or by RT-PCR from fresh ganglia tissue. The majority of the neuropeptides and/or receptors were found to be expressed in both groups, although there were neuropeptides and/or receptors that were unique to the dimorphic and bouton afferent neuron pool. The expression of selected neuropeptides or their receptors was confirmed using immunohistochemistry in the crista ampullares. Our results suggest that the unexpected neuropeptide diversity and their differences in expression pattern could serve unique roles in the physiology of the vestibular neuroepithelium. Keywords: expression profiling, neuropeptides, vestibular neuroepithelium, calretinin

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Identification of miRNAs that regulate vestibular compensation

Project description:To investigate which miRNAs regulate the vestibular compensation after unilateral vestibular deafferentiation (UVD), we have performed microarray for miRNAs as a discovery platform. UVD induces breakdown of the activity of ipsilesional vestibular nuclei and an unbalance of activity between bilateral vestibular nuclei. Vestibular compensation is a course of rebalancing of activities of bilateral vestibular nuclei. It takes place mainly in medial vestibular nucleus. This study was performed using seven week-old-male Sprague–Dawley rats. Based on our previous experiment about vestibular compensation course, we set two time points for harvesting medial vestibular nuclei: 4hr and 4 days after unilateral vestibular deafferentiation. Twenty four animals were divided into two experimental groups: UVD group undergoing UVD at left side (n = 12); and SO group undergoing sham operation (SO) at left side (n=12). Six animals of each group were anesthetized deeply and euthanized at 4 hr or 4 days after surgery, respectively. Medial vestibular nucleus at left side was harvested. Medial vestibular nucleus from three animals became one sample for microarray. Sequentially two samples were obtained for each time point in one group. Microarray for miRNAs was performed using the Agilent Rat miRNA Microarray 8x15K platforms. Considering the fold change of normalized signal intensities between two time points in UVD group and between UVD and SO groups at the same time, miR-31a-5p, 133a-3p, 133b-3p, 204-5p, 206-3p, 218a-5p, 219a-5p, 221-3p and 497-5p were selected as the candidate miRNAs. This result was validated by quantitative reverse transcription-PCR.

2018-02-27 | GSE93111 | GEO

Optical trapping of otoliths drives vestibular behaviours in larval zebrafish.

Project description:The vestibular system, which detects gravity and motion, is crucial to survival, but the neural circuits processing vestibular information remain incompletely characterised. In part, this is because the movement needed to stimulate the vestibular system hampers traditional neuroscientific methods. Optical trapping uses focussed light to apply forces to targeted objects, typically ranging from nanometres to a few microns across. In principle, optical trapping of the otoliths (ear stones) could produce fictive vestibular stimuli in a stationary animal. Here we use optical trapping in vivo to manipulate 55-micron otoliths in larval zebrafish. Medial and lateral forces on the otoliths result in complementary corrective tail movements, and lateral forces on either otolith are sufficient to cause a rolling correction in both eyes. This confirms that optical trapping is sufficiently powerful and precise to move large objects in vivo, and sets the stage for the functional mapping of the resulting vestibular processing.The neural circuits of the vestibular system, which detects gravity and motion, remain incompletely characterised. Here the authors use an optical trap to manipulate otoliths (ear stones) in zebrafish larvae, and elicit corrective tail movements and eye rolling, thus establishing a method for mapping vestibular processing.

| S-EPMC5606998 | biostudies-literature

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