Defects in Axonal Elongation and Neuronal Migration in Mice with Disrupted tau and map1b Genes

Takei, Yosuke; Teng, Junlin; Harada, Akihiro; Hirokawa, Nobutaka

doi:https://doi.org/10.1083/jcb.150.5.989

Defects in Axonal Elongation and Neuronal Migration in Mice with Disrupted tau and map1b Genes

Takei, Yosuke; Teng, Junlin; Harada, Akihiro et al.

Journal of Cell Biology, 2000, 150(5), 989-1000

アクセス数:597件（2025-07-27 21:39 集計）

固定URL: https://hdl.handle.net/11094/23081

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タイトル	Defects in Axonal Elongation and Neuronal Migration in Mice with Disrupted tau and map1b Genes
著者	NRID 1000020272487 1000020272487 著者名 Takei, Yosuke
	著者名 Teng, Junlin
	NRID 1000040251441 1000040251441 researchmap permalink aharada aharada Scopus Author ID 7202253419 7202253419 著者名 Harada, Akihiro
	NRID 1000020010085 1000020010085 著者名 Hirokawa, Nobutaka
キーワード等	tau
	MAP1B
	axon
	growth cone
	neuronal migration
抄録	Tau and MAP1B are the main members of neuronal microtubule-associated proteins (MAPs), the functions of which have remained obscure because of a putative functional redundancy (Harada, A., K. Oguchi, S. Okabe, J. Kuno, S. Terada, T. Ohshima, R. SatoYoshitake, Y. Takei, T. Noda, and N. Hirokawa. 1994. Nature. 369:488–491; Takei, Y., S. Kondo, A. Harada, S. Inomata, T. Noda, and N. Hirokawa. 1997. J. Cell Biol. 137:1615–1626). To unmask the role of these proteins, we generated double-knockout mice with disrupted tau and map1b genes and compared their phenotypes with those of single-knockout mice. In the analysis of mice with a genetic background of predominantly C57Bl/6J, a hypoplastic commissural axon tract and disorganized neuronal layering were observed in the brains of the tau +/+map1b-/-mice. These phenotypes are markedly more severe in tau -/-map1b-/-double mutants, indicating that tau and MAP1B act in a synergistic fashion. Primary cultures of hippocampal neurons from tau -/-map1b-/-mice showed inhibited axonal elongation. In these cells, a generation of new axons via bundling of microtubules at the neck of the growth cones appeared to be disturbed. Cultured cerebellar neurons from tau -/-map1b-/-mice showed delayed neuronal migration concomitant with suppressed neurite elongation. These findings indicate the cooperative functions of tau and MAP1B in vivo in axonal elongation and neuronal migration as regulators of microtubule oganization.
出版者	The Rockefeller University Press
収録物名	Journal of Cell Biology
巻(号)	150(5)
ページ	989-1000
刊行年月	2000-09-04
言語	英語
ハンドルURL	https://hdl.handle.net/11094/23081
PISSN	00219525
NCID	AA00694812
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1083/jcb.150.5.989
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Journal of Cell Biology. 2000, 150(5), p. 989-1000
DC.title	Defects in Axonal Elongation and Neuronal Migration in Mice with Disrupted tau and map1b Genes
DC.creator	Takei, Yosuke
	Teng, Junlin
	Harada, Akihiro
	Hirokawa, Nobutaka
DC.publisher	The Rockefeller University Press
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2000-09-04
DC.identifier	https://doi.org/10.1083/jcb.150.5.989
DC.subject	tau
	MAP1B
	axon
	growth cone
	neuronal migration
DCTERMS.abstract	Tau and MAP1B are the main members of neuronal microtubule-associated proteins (MAPs), the functions of which have remained obscure because of a putative functional redundancy (Harada, A., K. Oguchi, S. Okabe, J. Kuno, S. Terada, T. Ohshima, R. SatoYoshitake, Y. Takei, T. Noda, and N. Hirokawa. 1994. Nature. 369:488–491; Takei, Y., S. Kondo, A. Harada, S. Inomata, T. Noda, and N. Hirokawa. 1997. J. Cell Biol. 137:1615–1626). To unmask the role of these proteins, we generated double-knockout mice with disrupted tau and map1b genes and compared their phenotypes with those of single-knockout mice. In the analysis of mice with a genetic background of predominantly C57Bl/6J, a hypoplastic commissural axon tract and disorganized neuronal layering were observed in the brains of the tau +/+map1b-/-mice. These phenotypes are markedly more severe in tau -/-map1b-/-double mutants, indicating that tau and MAP1B act in a synergistic fashion. Primary cultures of hippocampal neurons from tau -/-map1b-/-mice showed inhibited axonal elongation. In these cells, a generation of new axons via bundling of microtubules at the neck of the growth cones appeared to be disturbed. Cultured cerebellar neurons from tau -/-map1b-/-mice showed delayed neuronal migration concomitant with suppressed neurite elongation. These findings indicate the cooperative functions of tau and MAP1B in vivo in axonal elongation and neuronal migration as regulators of microtubule oganization.
DC.format	23081
citation_title	Defects in Axonal Elongation and Neuronal Migration in Mice with Disrupted tau and map1b Genes
citation_author	Takei, Yosuke
	Teng, Junlin
	Harada, Akihiro
	Hirokawa, Nobutaka
citation_publisher	The Rockefeller University Press
citation_language	英語
citation_date	2000-09-04
citation_journal_title	Journal of Cell Biology
citation_volume	150
citation_issue	5
citation_firstpage	989
citation_lastpage	1000
citation_doi	https://doi.org/10.1083/jcb.150.5.989
citation_public_url	https://hdl.handle.net/11094/23081

Defects in Axonal Elongation and Neuronal Migration in Mice with Disrupted tau and map1b Genes

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