PUBLICATION
Repulsion and attraction of axons by Semaphorin3D are mediated by different neuropilins in vivo
- Authors
- Wolman, M.A., Liu, Y., Tawarayama, H., Shoji, W., and Halloran, M.C.
- ID
- ZDB-PUB-041006-5
- Date
- 2004
- Source
- The Journal of neuroscience : the official journal of the Society for Neuroscience 24(39): 8428-8435 (Journal)
- Registered Authors
- Halloran, Mary, Liu, Yan, Shoji, Wataru, Wolman, Marc
- Keywords
- semaphorin; neuropilin; axon guidance; fasciculation; chemoattraction; chemorepulsion
- MeSH Terms
-
- Animals
- Axons/physiology*
- Brain/embryology
- Brain/metabolism
- Brain/ultrastructure
- Nerve Growth Factors/biosynthesis
- Nerve Growth Factors/physiology*
- Nerve Tissue Proteins/biosynthesis
- Nerve Tissue Proteins/physiology*
- Neural Pathways/embryology
- Neuropilin-2/biosynthesis
- Neuropilin-2/physiology*
- Neuropilins/biosynthesis
- Neuropilins/physiology*
- Oligodeoxyribonucleotides, Antisense
- Semaphorins
- Septal Nuclei/embryology
- Telencephalon/embryology
- Zebrafish/embryology
- Zebrafish Proteins/biosynthesis
- Zebrafish Proteins/physiology*
- PubMed
- 15456815 Full text @ J. Neurosci.
Citation
Wolman, M.A., Liu, Y., Tawarayama, H., Shoji, W., and Halloran, M.C. (2004) Repulsion and attraction of axons by Semaphorin3D are mediated by different neuropilins in vivo. The Journal of neuroscience : the official journal of the Society for Neuroscience. 24(39):8428-8435.
Abstract
Class 3 semaphorins are known to repel and/or sometimes attract axons; however, their role in guiding developing axons in the CNS in vivo is still essentially unknown. We investigated the role of Semaphorin3D (Sema3D) in the formation of the early axon pathways in the zebrafish CNS. Morpholino knock-down shows that Sema3D is essential for the correct formation of two early axon pathways. Sema3D appears to guide axons of the nucleus of the medial longitudinal fasciculus (nucMLF) by repulsion and modulation of fasciculation. In contrast, Sema3D appears to be attractive to telencephalic neurons that form the anterior commissure (AC). Knock-down of Neuropilin-1A (Npn-1A) phenocopied the effects of Sema3D knock-down on the nucMLF axons, and knock-down of either Npn-1A or Npn-2B phenocopied the defects of the AC. Furthermore, simultaneous partial knock-down experiments demonstrated genetic interactions among Sema3D, Npn-1A, and Npn-2B. Together, these data support the hypothesis that Sema3D may act as a repellent through receptors containing Npn-1A and as an attractant via receptors containing Npn-1A and Npn-2B.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping