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Semaphorin 3A-Neuropilin-1 signaling regulates peripheral axon fasciculation and pathfinding but not developmental cell death patterns.
Eur. J. Neurosci. 31, 1164-1172 (2010)
In early development, an excess of neurons is generated, of which later about half will be lost by cell death due to a limited supply of trophic support by their respective target areas. However, some of the neurons die when their axons have not yet reached their target, thus suggesting that additional causes of developmental cell death exist. Semaphorin 3A (Sema3A), in addition to its function as a guidance cue and mediator of timing and fasciculation of motor and sensory axon outgrowth, can also induce death of sensory neurons in vitro. However, it is unknown whether Neuropilin-1 (Npn-1), its binding receptor in axon guidance, also mediates the death-inducing activity. We show here that abolished Sema3A-Npn-1 signaling does not influence the cell death patterns of motor or sensory neurons in mouse during the developmental wave of programmed cell death. The number of motor and sensory neurons was unchanged at embryonic day 15.5 when this wave is concluded. Interestingly, the defasciculation of early motor and sensory projections that is observed in the absence of Sema3A or Npn-1 persists to postnatal stages. Thus, Sema3A-Npn-1 signaling plays an important role in the guidance and fasciculation of motor and sensory axons but does not contribute to the developmental elimination of these neurons.
Impact Factor
Scopus SNIP
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Times Cited
Times Cited
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3.418
1.260
14
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Anmerkungen
Besondere Publikation
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Apoptosis; Axon guidance; Fasciculation; Motoneurons; Mouse; Sensory neurons
Sprache
englisch
Veröffentlichungsjahr
2010
HGF-Berichtsjahr
2010
ISSN (print) / ISBN
0953-816X
e-ISSN
1460-9568
Zeitschrift
European Journal of Neuroscience
Quellenangaben
Band: 31,
Heft: 7,
Seiten: 1164-1172
Verlag
Wiley
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Developmental Genetics (IDG)
POF Topic(s)
30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
Forschungsfeld(er)
Genetics and Epidemiology
PSP-Element(e)
G-550400-001
PubMed ID
20345923
Scopus ID
77950408903
Erfassungsdatum
2010-09-08