title: Draxin, an axon guidance protein, affects chick trunk neural crest migration.
abstract: The neural crest is a multipotent population of migratory cells that arises in the central nervous system and subsequently migrates along defined stereotypic pathways. In the present work, we analyzed the role of a repulsive axon guidance protein, draxin, in the migration of neural crest cells. Draxin is expressed in the roof plate of the chick trunk spinal cord and around the early migration pathway of neural crest cells. Draxin modulates chick neural crest cell migration in vitro by reducing the polarization of these cells. When exposed to draxin, the velocity of migrating neural crest cells was reduced, and the cells changed direction so frequently that the net migration distance was also reduced. Overexpression of draxin also caused some early migrating neural crest cells to change direction to the dorsolateral pathway in the chick trunk region, presumably due to draxin's inhibitory activity. These results demonstrate that draxin, an axon guidance protein, can also affect trunk neural crest migration in the chick embryo.
authors.affiliation: Division of Developmental Neurobiology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan.
authors.forename: Yuhong
authors.initials: Y
authors.lastname: Su
authors.forename: Iftekhar B
authors.initials: IB
authors.lastname: Naser
authors.forename: Shahidul M
authors.initials: SM
authors.lastname: Islam
authors.forename: Sanbing
authors.initials: S
authors.lastname: Zhang
authors.forename: Giasuddin
authors.initials: G
authors.lastname: Ahmed
authors.forename: Sandy
authors.initials: S
authors.lastname: Chen
authors.forename: Yohei
authors.initials: Y
authors.lastname: Shinmyo
authors.forename: Minoru
authors.initials: M
authors.lastname: Kawakami
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Yamamura
authors.forename: Hideaki
authors.initials: H
authors.lastname: Tanaka
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified; D001369:Axons / Q000378:metabolism / Q000502:physiology; D002465:Cell Movement / Q000187:drug effects / Q000235:genetics*; D016764:Cell Polarity / Q000187:drug effects / Q000235:genetics; D002478:Cells, Cultured; D002642:Chick Embryo; D018507:Gene Expression Regulation, Developmental / Q000502:physiology; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism / Q000494:pharmacology / Q000502:physiology*; D009432:Neural Crest / Q000187:drug effects / Q000196:embryology* / Q000378:metabolism / Q000502:physiology; D055495:Neurogenesis / Q000235:genetics; D011485:Protein Binding; D015398:Signal Transduction / Q000235:genetics; D013909:Thorax / Q000196:embryology / Q000378:metabolism; D013997:Time Factors
chemical_list: D009419:Nerve Tissue Proteins