Abstract:
:Layer II of the entorhinal cortex contains the cells of origin for the perforant path, plays a critical role in memory processing, and consistently degenerates in end-stage Alzheimer's disease. The extent to which neuron loss in layer II of entorhinal cortex is related to mild cognitive impairment without dementia has not been extensively investigated. We analyzed 29 participants who came to autopsy from our ongoing longitudinal study of aging and dementia composed of religious clergy (Religious Orders Study). All individuals underwent detailed clinical evaluation within 12 months of death and were categorized as having no cognitive impairment (n = 8), mild cognitive impairment (n = 10), or mild or moderate Alzheimer's disease (n = 11). Sections through the entorhinal cortex were immunoreacted with an antibody directed against a neuron-specific nuclear protein (NeuN). Stereological counts of NeuN-immunoreactive stellate cells, their volume, and the volume of layer II entorhinal cortex were estimated. Cases exhibiting no cognitive impairment averaged 639,625 +/- 184,600 layer II stellate neurons in the right entorhinal cortex. Individuals with mild cognitive impairment (63.5%; p < 0.0003) and mild or moderate Alzheimer's disease (46.06%; p < 0.0017) displayed significant losses of layer II entorhinal cortex neurons relative to those with no cognitive impairment but not relative to each other (p > 0.33). There was also significant atrophy of layer II entorhinal cortex neurons in individuals with mild cognitive impairment (24.1%) and Alzheimer's disease (25.1%). The volume of layer II was also reduced in individuals with mild cognitive impairment (26.5%), with a further reduction in those with Alzheimer's disease (46.4%). The loss and atrophy of layer II entorhinal cortex neurons significantly correlated with performance on clinical tests of declarative memory. Atrophy of layer II entorhinal cortex and the neurons within this layer significantly correlated with performance on the Mini Mental Status Examination. These data indicate that atrophy and loss of layer II entorhinal cortex neurons occur in elderly subjects with mild cognitive impairment prior to the onset of dementia and suggests that these changes are not exacerbated in early Alzheimer's disease.
journal_name
Ann Neuroljournal_title
Annals of neurologyauthors
Kordower JH,Chu Y,Stebbins GT,DeKosky ST,Cochran EJ,Bennett D,Mufson EJkeywords:
subject
Has Abstractpub_date
2001-02-01 00:00:00pages
202-13issue
2eissn
0364-5134issn
1531-8249journal_volume
49pub_type
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journal_title:Annals of neurology
pub_type: 杂志文章
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journal_title:Annals of neurology
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journal_title:Annals of neurology
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doi:10.1002/ana.410180312
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abstract::The disappearance rates from plasma of intravenously administered levo-norepinephrine (l-NE), dextro-norepinephrine (d-NE), and isoproterenol (ISO) were measured in normal subjects and in patients with either multiple-system atrophy (MSA) or idiopathic orthostatic hypotension (IOH). The two isomers, l-NE and d-NE, wer...
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abstract:OBJECTIVE:Rapid reversal of the anticoagulatory effect of vitamin K antagonists represents the primary emergency treatment for oral anticoagulant-related intracerebral hemorrhage (OAC-ICH). Predicting the amount of prothrombin complex concentrate (PCC) needed to reverse OAC in individual patients is difficult, and repe...
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pub_type: 临床试验,杂志文章
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journal_title:Annals of neurology
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journal_title:Annals of neurology
pub_type: 杂志文章
doi:10.1002/ana.410390318
更新日期:1996-03-01 00:00:00
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journal_title:Annals of neurology
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doi:
更新日期:2001-03-01 00:00:00