Abstract:
:The balance between excitatory and inhibitory synaptic inputs is critical for the physiological control of motoneurons. The maintenance of a low-intracellular chloride concentration by the potassium chloride cotransporter 2 (KCC2) is essential for the efficacy of fast synaptic inhibition of mature motoneurons in response to the activation of ionotropic γ-aminobutyric acid A and glycine receptors. Altered synaptic balance and excitotoxicity have been proposed as candidate pathophysiological processes in amyotrophic lateral sclerosis (ALS). Therefore, we investigated the expression patterns of KCC2 and its functional opponent, the chloride influx-mediating sodium-potassium chloride cotransporter 1 (NKCC1), in the superoxide dismutase 1 (SOD1-G93A) mouse model of ALS. We detected reduced KCC2 messenger RNA levels and less membrane-bound KCC2 immunoreactivity in ALS-vulnerable motoneurons in lumbar spinal cord and hypoglossal nuclei of SOD1-G93A mice but not in degeneration-resistant oculomotor nuclei. Downregulation of KCC2 started during late presymptomatic stages and accelerated in parallel to hind limb and tongue motor function deficits. In contrast, NKCC1 messenger RNA levels were unaltered in postnatal lumbar spinal cord motoneurons. Our data indicate that reductions in KCC2 gene expression may contribute to selective motor deficits and disease progression in vulnerable motoneurons in a mouse model of ALS.
journal_name
J Neuropathol Exp Neuroljournal_title
Journal of neuropathology and experimental neurologyauthors
Fuchs A,Ringer C,Bilkei-Gorzo A,Weihe E,Roeper J,Schütz Bdoi
10.1097/NEN.0b013e3181f4dcefsubject
Has Abstractpub_date
2010-10-01 00:00:00pages
1057-70issue
10eissn
0022-3069issn
1554-6578journal_volume
69pub_type
杂志文章abstract::Recent studies have shown that the Alzheimer disease (AD) neocortex is characterized by a loss of large neurons, the presence of dilated terminal axons, widespread loss of synapses, and a disruption of the dendritic cytoskeleton which is manifested as Tau immunoreactive threads. In the present study we have investigat...
journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1097/00005072-199207000-00003
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1093/jnen/61.3.254
更新日期:2002-03-01 00:00:00
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journal_title:Journal of neuropathology and experimental neurology
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doi:10.1097/00005072-197809000-00004
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journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1097/00005072-199809000-00008
更新日期:1998-09-01 00:00:00
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journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1097/NEN.0b013e318190d6db
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journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1093/jnen/nlx090
更新日期:2017-12-01 00:00:00
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journal_title:Journal of neuropathology and experimental neurology
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doi:10.1093/jnen/nlaa147
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journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1097/00005072-199409000-00008
更新日期:1994-09-01 00:00:00
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journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1097/NEN.0b013e318225038c
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journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1097/00005072-198309000-00009
更新日期:1983-09-01 00:00:00
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journal_title:Journal of neuropathology and experimental neurology
pub_type: 杂志文章
doi:10.1097/00005072-198103000-00009
更新日期:1981-03-01 00:00:00
abstract::Diabetic polyneuropathy (DPN) shows more severe functional and structural changes in type 1 than in type 2 human and experimental diabetes. We have previously suggested that these differences may be due to insulin and/or C-peptide deficiencies in type 1 diabetes. To further explore these differences between type I and...
journal_title:Journal of neuropathology and experimental neurology
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doi:10.1093/jnen/62.3.260
更新日期:2003-03-01 00:00:00
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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doi:10.1097/00005072-199411000-00008
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journal_title:Journal of neuropathology and experimental neurology
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doi:10.1093/jnen/62.9.908
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journal_title:Journal of neuropathology and experimental neurology
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doi:10.1097/00005072-197509000-00002
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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更新日期:2009-06-01 00:00:00
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journal_title:Journal of neuropathology and experimental neurology
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