Naturally occurring somatic motoneuron death in a teleost angelfish, Pterophyllum scalare
Identifieur interne : 000594 ( Main/Exploration ); précédent : 000593; suivant : 000595Naturally occurring somatic motoneuron death in a teleost angelfish, Pterophyllum scalare
Auteurs : Hirotaka Sakamoto [Japon] ; Masayuki Yoshida [Japon] ; Kazumasa Uematsu [Japon]Source :
- Neuroscience Letters [ 0304-3940 ] ; 1999.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
- Angelfish, Animals, Anterior spinal root, Apoptosis, Apoptosis (physiology), Cell Nucleus (physiology), Cell Nucleus (ultrastructure), Cell death, DNA Fragmentation, Development, Developmental cell death, Embryo, Nonmammalian (cytology), Embryo, Nonmammalian (physiology), Fishes (anatomy & histology), Fishes (growth & development), Fishes (physiology), In Situ Nick-End Labeling, Microscopy, Electron, Motoneuron, Motor Neurons (cytology), Motor Neurons (physiology), Motor Neurons (ultrastructure), Motor neuron, Spinal Nerve Roots (physiology), Spinal Nerve Roots (ultrastructure), Terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick end labeling, Ultrastructure, Ventral root.
- MESH :
- anatomy & histology : Fishes.
- cytology : Embryo, Nonmammalian, Motor Neurons.
- growth & development : Fishes.
- physiology : Apoptosis, Cell Nucleus, Embryo, Nonmammalian, Fishes, Motor Neurons, Spinal Nerve Roots.
- ultrastructure : Cell Nucleus, Motor Neurons, Spinal Nerve Roots.
- Animals, DNA Fragmentation, In Situ Nick-End Labeling, Microscopy, Electron.
Abstract
Naturally occurring somatic motoneuron death in a teleost angelfish, Pterophyllum scalare, was investigated histochemically and electron microscopically. The number of motor axons in the ventral root, which corresponds to the motoneuron number in spinal hemisegment, was rapidly increased beyond the adult value within 3 days after hatching, and then decreased to reach the adult value within a few weeks. Terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick end labeling (TUNEL) histochemistry, which detects fragmented nuclear DNA characteristic to apoptotic cells, showed that the apoptotic cells are located in the motor column of the cord in the larvae at specific developmental stages. Electron microscopic observations of the spinal cells further confirmed the motoneuron apoptosis. The present data suggest that the massive death of somatic motoneurons at certain ontogenic stages which has been known to occur in higher vertebrates also takes place in fish.
Url:
DOI: 10.1016/S0304-3940(99)00353-5
Affiliations:
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Le document en format XML
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The number of motor axons in the ventral root, which corresponds to the motoneuron number in spinal hemisegment, was rapidly increased beyond the adult value within 3 days after hatching, and then decreased to reach the adult value within a few weeks. Terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick end labeling (TUNEL) histochemistry, which detects fragmented nuclear DNA characteristic to apoptotic cells, showed that the apoptotic cells are located in the motor column of the cord in the larvae at specific developmental stages. Electron microscopic observations of the spinal cells further confirmed the motoneuron apoptosis. The present data suggest that the massive death of somatic motoneurons at certain ontogenic stages which has been known to occur in higher vertebrates also takes place in fish.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><country name="Japon"><noRegion><name sortKey="Sakamoto, Hirotaka" sort="Sakamoto, Hirotaka" uniqKey="Sakamoto H" first="Hirotaka" last="Sakamoto">Hirotaka Sakamoto</name></noRegion><name sortKey="Uematsu, Kazumasa" sort="Uematsu, Kazumasa" uniqKey="Uematsu K" first="Kazumasa" last="Uematsu">Kazumasa Uematsu</name><name sortKey="Yoshida, Masayuki" sort="Yoshida, Masayuki" uniqKey="Yoshida M" first="Masayuki" last="Yoshida">Masayuki Yoshida</name><name sortKey="Yoshida, Masayuki" sort="Yoshida, Masayuki" uniqKey="Yoshida M" first="Masayuki" last="Yoshida">Masayuki Yoshida</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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