Neuronal calcium sensor‐1 gene ncs‐1a is essential for semicircular canal formation in zebrafish inner ear

We have analyzed the functional role of neuronal calcium sensor‐1 (Ncs‐1) in zebrafish development. We identified two orthologs of the mammalian NCS‐1 gene. Full‐length cDNAs encoding zebrafish Ncs‐1a and Ncs‐1b polypeptides were cloned and characterized. Whole‐mount in situ hybridization revealed t...

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Veröffentlicht in:Journal of neurobiology 2005-09, Vol.64 (3), p.285-297
Hauptverfasser: Blasiole, Brian, Kabbani, Nadine, Boehmler, Wendy, Thisse, Bernard, Thisse, Christine, Canfield, Victor, Levenson, Robert
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container_issue 3
container_start_page 285
container_title Journal of neurobiology
container_volume 64
creator Blasiole, Brian
Kabbani, Nadine
Boehmler, Wendy
Thisse, Bernard
Thisse, Christine
Canfield, Victor
Levenson, Robert
description We have analyzed the functional role of neuronal calcium sensor‐1 (Ncs‐1) in zebrafish development. We identified two orthologs of the mammalian NCS‐1 gene. Full‐length cDNAs encoding zebrafish Ncs‐1a and Ncs‐1b polypeptides were cloned and characterized. Whole‐mount in situ hybridization revealed that ncs‐1a mRNA was expressed beginning at early somitogenesis. As development progressed, ncs‐1a mRNA was present throughout the embryo with expression detected in ventral hematopoietic mesoderm, pronephric tubules, CNS nuclei, and otic vesicle. By 4.5 days post fertilization (dpf), ncs‐1a expression was detected primarily in the brain. Expression of ncs‐1b mRNA was first detected at 36 hours post fertilization (hpf) and was restricted to the olfactory bulb. By 4.5 dpf, ncs‐1b was expressed at low levels throughout the brain. Knockdown of ncs‐1a mRNA translation with antisense morpholinos blocked formation of semicircular canals. These studies identify a novel function for ncs‐1a in inner ear development and suggest that this calcium sensor plays an important role in vestibular function. © 2005 Wiley Periodicals, Inc. J Neurobiol, 2005
doi_str_mv 10.1002/neu.20138
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We identified two orthologs of the mammalian NCS‐1 gene. Full‐length cDNAs encoding zebrafish Ncs‐1a and Ncs‐1b polypeptides were cloned and characterized. Whole‐mount in situ hybridization revealed that ncs‐1a mRNA was expressed beginning at early somitogenesis. As development progressed, ncs‐1a mRNA was present throughout the embryo with expression detected in ventral hematopoietic mesoderm, pronephric tubules, CNS nuclei, and otic vesicle. By 4.5 days post fertilization (dpf), ncs‐1a expression was detected primarily in the brain. Expression of ncs‐1b mRNA was first detected at 36 hours post fertilization (hpf) and was restricted to the olfactory bulb. By 4.5 dpf, ncs‐1b was expressed at low levels throughout the brain. Knockdown of ncs‐1a mRNA translation with antisense morpholinos blocked formation of semicircular canals. These studies identify a novel function for ncs‐1a in inner ear development and suggest that this calcium sensor plays an important role in vestibular function. © 2005 Wiley Periodicals, Inc. 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subjects Amino Acid Sequence
Animals
Biochemistry, Molecular Biology
Blotting, Western
Brain
Brain - embryology
Calcium-Binding Proteins
Calcium-Binding Proteins - genetics
Cloning, Molecular
ear development
Freshwater
Gene Expression Regulation, Developmental
Humans
In Situ Hybridization
Life Sciences
Molecular biology
Molecular Sequence Data
morpholinos
neuronal calcium sensor
Neuronal Calcium-Sensor Proteins
Neuropeptides
Neuropeptides - genetics
Oligonucleotides, Antisense
Phylogeny
Reverse Transcriptase Polymerase Chain Reaction
RNA, Messenger
RNA, Messenger - analysis
Semicircular Canals
Semicircular Canals - embryology
Sequence Homology, Amino Acid
Zebrafish
Zebrafish Proteins
Zebrafish Proteins - genetics
title Neuronal calcium sensor‐1 gene ncs‐1a is essential for semicircular canal formation in zebrafish inner ear
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