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Neurofibrillary tangles of Guam parkinson-dementia are associated with reactive microglia and complement proteins

Identifieur interne : 001506 ( Istex/Corpus ); précédent : 001505; suivant : 001507

Neurofibrillary tangles of Guam parkinson-dementia are associated with reactive microglia and complement proteins

Auteurs : Claudia Schwab ; John C. Steele ; Patrick L. Mcgeer

Source :

RBID : ISTEX:0A098236B887108FDF69547B040B01E710E23399

English descriptors

Abstract

Guamanian parkinsonism-dementia, locally described as bodig, is characterized by the widespread appearance of neurofibrillary tangles in cortical and subcortical areas. These tangles have similar regional distribution and immunohistochemical profile to those found in Alzheimer disease (AD). We studied the immunohistochemical staining of these tangles, as well as those of AD, using antibodies to complement proteins and related molecules. In bodig, as in AD, extracellular tangles were intensely decorated with antibodies to C1q, C4d and C3d, but not fraction Bb of factor B, properidin or immunoglobulins. This is evidence that the classical, but not the alternative complement pathway is activated on extracellular tangles and that the activation is independent of antibodies. Immunohistochemical staining for amyloid P, an in vitro activator of complement, was remarkably similar to that for the Clq, C4d and Cad in both bodig and AD. This was not the case for ß-amyloid protein (BAP), another in vitro complement activator. Positive staining was observed in only a minority of extracellular tangles in bodig and was only rarely observed in those of AD. BAP would therefore not appear to be a candidate for activating complement on extracellular neurofibrillary tangles. Reactive microglia and reactive astrocytes were closely associated with complement positive extracellular neurofibrillary tangles, indicating an inflammatory response similar to that seen in AD.

Url:
DOI: 10.1016/0006-8993(95)01257-5

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ISTEX:0A098236B887108FDF69547B040B01E710E23399

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<abstract lang="en">Guamanian parkinsonism-dementia, locally described as bodig, is characterized by the widespread appearance of neurofibrillary tangles in cortical and subcortical areas. These tangles have similar regional distribution and immunohistochemical profile to those found in Alzheimer disease (AD). We studied the immunohistochemical staining of these tangles, as well as those of AD, using antibodies to complement proteins and related molecules. In bodig, as in AD, extracellular tangles were intensely decorated with antibodies to C1q, C4d and C3d, but not fraction Bb of factor B, properidin or immunoglobulins. This is evidence that the classical, but not the alternative complement pathway is activated on extracellular tangles and that the activation is independent of antibodies. Immunohistochemical staining for amyloid P, an in vitro activator of complement, was remarkably similar to that for the Clq, C4d and Cad in both bodig and AD. This was not the case for ß-amyloid protein (BAP), another in vitro complement activator. Positive staining was observed in only a minority of extracellular tangles in bodig and was only rarely observed in those of AD. BAP would therefore not appear to be a candidate for activating complement on extracellular neurofibrillary tangles. Reactive microglia and reactive astrocytes were closely associated with complement positive extracellular neurofibrillary tangles, indicating an inflammatory response similar to that seen in AD.</abstract>
<note type="content">Section title: Research report</note>
<subject lang="en">
<genre>Keywords</genre>
<topic>Alzheimer disease</topic>
<topic>Amyloid P</topic>
<topic>β-Amyloid protein</topic>
<topic>Reactive astrocyte</topic>
<topic>Microglia</topic>
<topic>Inflammation</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Brain Research</title>
</titleInfo>
<titleInfo type="abbreviated">
<title>BRES</title>
</titleInfo>
<genre type="journal">journal</genre>
<originInfo>
<dateIssued encoding="w3cdtf">19960129</dateIssued>
</originInfo>
<identifier type="ISSN">0006-8993</identifier>
<identifier type="PII">S0006-8993(00)X0020-0</identifier>
<part>
<date>19960129</date>
<detail type="volume">
<number>707</number>
<caption>vol.</caption>
</detail>
<detail type="issue">
<number>2</number>
<caption>no.</caption>
</detail>
<extent unit="issue pages">
<start>139</start>
<end>328</end>
</extent>
<extent unit="pages">
<start>196</start>
<end>205</end>
</extent>
</part>
</relatedItem>
<identifier type="istex">0A098236B887108FDF69547B040B01E710E23399</identifier>
<identifier type="DOI">10.1016/0006-8993(95)01257-5</identifier>
<identifier type="PII">0006-8993(95)01257-5</identifier>
<identifier type="ArticleID">95012575</identifier>
<recordInfo>
<recordContentSource>ELSEVIER</recordContentSource>
</recordInfo>
</mods>
</metadata>
</istex>
</record>

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