Light and electron microscopic distribution of the AMPA receptor subunit, GluR2, in the spinal cord of control and G86R mutant superoxide dismutase transgenic mice
Light and electron microscopic distribution of the AMPA receptor subunit, GluR2, in the spinal cord of control and G86R mutant superoxide dismutase transgenic mice
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AMPA 受体亚基 GluR2 在对照和 G86R 突变型超氧化物歧化酶转基因小鼠脊髓中的光和电子显微镜分布
DOI:
--
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
J. Morrison
中科院分区:
文献类型:
--
作者:
B. Morrison;W. Janssen;J. Gordon;J. Morrison
Excitotoxicity has been hypothesized to contribute to amyotrophic lateral sclerosis (ALS) neurodegeneration. The similar pattern of vulnerability in the spinal cord of mutant superoxide dismutase (SOD‐1) transgenic mice and mice treated with excitotoxins supports a role for excitotoxicity in the mechanism of degeneration. The distribution of the α‐amino‐3‐hydroxy‐5‐methyl‐4‐isoxazolepropionic acid (AMPA) class of glutamate receptors (GluRs) with different calcium permeabilities has been proposed as an explanation for this differential vulnerability. GluR2 appears to be the dominant determinant of calcium permeability for AMPA receptors; thus, it is critical for their contribution to excitotoxic mechanisms. In this study, we investigate the distribution of GluR2 immunoreactivity in the spinal cord of control and SOD‐1 transgenic mice. GluR2 immunoreactivity is present equally within vulnerable neurons (i.e., motor neurons and calretinin‐immunoreactive neurons) as well as nonvulnerable neurons (i.e., calbindin‐immunoreactive neurons and dorsal horn neurons). In addition, postembedding immunoelectron microscopy reveals that GluR2 is present in synapses of dorsal and ventral horn neurons and that the percentage of labeled synapses and numbers of immunogold particles per synapse do not vary between these spinal cord regions. Comparing control mice with SOD‐1 transgenic mice, at both the light and the electron microscopic levels, the distribution and intensity of GluR2‐immunoreactivity do not appear to be altered. These results suggest that the cellular and synaptic distribution of GluR2 is not a determinant of the selective vulnerability observed in SOD‐1 transgenic mice or in ALS patients. J. Comp. Neurol. 395:523–534, 1998. © 1998 Wiley‐Liss, Inc.
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影响因子:
158.5
作者:
ROTHSTEIN, JD;MARTIN, LJ;KUNCL, RW
通讯作者:
KUNCL, RW
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Brose,N;Huntley,GW;Stern-Bach,Y;Sharma,G;Morrison,JH;Heinemann,SF
通讯作者:
Heinemann,SF
DOI:
10.1073/pnas.90.14.6591
发表时间:
1993-07-15
影响因子:
11.1
作者:
ROTHSTEIN, JD;JIN, L;KUNCL, RW
通讯作者:
KUNCL, RW
DOI:
10.1073/pnas.89.21.10499
发表时间:
1992-11-01
影响因子:
11.1
作者:
PELLEGRINIGIAMPIETRO, DE;ZUKIN, RS;PULSINELLI, WA
通讯作者:
PULSINELLI, WA
影响因子:
2.9
作者:
Margulies,JE;Cohen,RW;Levine,MS;Watson,JB
通讯作者:
Watson,JB