Selective stabilization of tau in axons and microtubule-associated protein 2C in cell bodies and dendrites contributes to polarized localization of cytoskeletal proteins in mature neurons.

Selective stabilization of tau in axons and microtubule-associated protein 2C in cell bodies and dendrites contributes to polarized localization of cytoskeletal proteins in mature neurons.
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在轴突和微管相关蛋白2C中的TAU选择性稳定在细胞体和树突中有助于成熟神经元中细胞骨架蛋白的极化定位。

DOI:
10.1083/jcb.132.4.667
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发表时间:
1996-02
影响因子:
7.8
通讯作者:
Kanai, Y
Kanai, Y
中科院分区:
生物学1区
文献类型:
--
作者:
Hirokawa, N;Funakoshi, T;SatoHarada, R;Kanai, Y

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在成熟神经元中,tau蛋白在轴突中丰富,而微管相关蛋白2(MAP 2)和MAP 2C特异性地定位于树突中。参与这些细胞骨架蛋白的区室化的已知机制包括mRNA的差异定位(通过原位杂交揭示树突中的MAP 2 mRNA、细胞体中的MAP 2C mRNA和近端轴突中的Tau mRNA)(Garner,C.C.,R.P. Tucker和A.马图斯1988.自然(伦敦)。336:674 - 677; Litman,P.,巴格湖林祖斯基和我金斯堡1993. neuron. 10:627 - 638),抑制MAP 2向轴突中的转运(通过cDNA转染到神经元中揭示)(Kanai,Y.,和n.广川1995. neuron. 14:421 - 432),以及轴突与树突中MAP 2的差异转换(Okabe,S.,和n.广川1989. Proc. Natl. Acad. sci. USA. 86:4127 - 4131)。为了研究MAP的差异转换是否有助于其他主要MAP的定位,我们将生物素化的tau、MAP 2C或MAP 2显微注射到培养的成熟脊髓神经元中(约3周),然后通过免疫细胞化学方法分析它们的命运。最初,每一种都在轴突和树突中检测到,尽管tau仅在轴突中持续存在,而MAP2C和MAP2仅限于细胞体和树突。注射的MAP2C和MAP2与树突微管的结合比与轴突中的微管的结合更牢固,而注射的tau与轴突微管的结合比与树突中的微管的结合更牢固。因此,除了mRNA定位和选择性轴突运输的贡献外,三种主要MAP中的每一种的区室化通过局部差异周转发生。
In mature neurons, tau is abundant in axons, whereas microtubule- associated protein 2 (MAP2) and MAP2C are specifically localized in dendrites. Known mechanisms involved in the compartmentalization of these cytoskeletal proteins include the differential localization of mRNA (MAP2 mRNA in dendrites, MAP2C mRNA in cell body, and Tau mRNA in proximal axon revealed by in situ hybridization) (Garner, C.C., R.P. Tucker, and A. Matus. 1988. Nature (Lond.). 336:674-677; Litman, P., J. Barg, L. Rindzooski, and I. Ginzburg. 1993. Neuron. 10:627-638), suppressed transit of MAP2 into axons (revealed by cDNA transfection into neurons) (Kanai, Y., and N. Hirokawa. 1995. Neuron. 14:421-432), and differential turnover of MAP2 in axons vs dendrites (Okabe, S., and N. Hirokawa. 1989. Proc. Natl. Acad. Sci. USA. 86:4127-4131). To investigate whether differential turnover of MAPs contributes to localization of other major MAPs in general, we microinjected biotinylated tau, MAP2C, or MAP2 into mature spinal cord neurons in culture (approximately 3 wk) and then analyzed their fates by antibiotin immunocytochemistry. Initially, each was detected in axons and dendrites, although tau persisted only in axons, whereas MAP2C and MAP2 were restricted to cell bodies and dendrites. Injected MAP2C and MAP2 bound to dendritic microtubules more firmly than to microtubules in axons, while injected tau bound to axonal microtubules more firmly than to microtubules in dendrites. Thus, beyond contributions from mRNA localization and selective axonal transport, compartmentalization of each of the three major MAPs occurs through local differential turnover.
DOI: 10.1083/jcb.107.4.1449
发表时间: 1988-10
期刊: The Journal of cell biology
影响因子: --
作者:
Hirokawa N;Shiomura Y;Okabe S
通讯作者: Okabe S
DOI: 10.1083/jcb.102.3.1007
发表时间: 1986-03
期刊: The Journal of cell biology
影响因子: --
作者:
Kristofferson D;Mitchison T;Kirschner M
通讯作者: Kirschner M
DOI: 10.1083/jcb.101.4.1371
发表时间: 1985-10
期刊: The Journal of cell biology
影响因子: --
作者:
Binder LI;Frankfurter A;Rebhun LI
通讯作者: Rebhun LI
DOI: 10.1083/jcb.109.3.1173
发表时间: 1989-09
期刊: The Journal of cell biology
影响因子: --
作者:
Kanai Y;Takemura R;Oshima T;Mori H;Ihara Y;Yanagisawa M;Masaki T;Hirokawa N
通讯作者: Hirokawa N
DOI: 10.1002/cne.902260205
发表时间: 1984-01-01
影响因子: 2.5
作者:
BERNHARDT, R;MATUS, A
通讯作者: MATUS, A