Alpha-synuclein immunoreactivity and ultrastructural study of glial cytoplasmic inclusions in multiple system atrophy / 中华医学杂志(英文版)
Chinese Medical Journal
;
(24): 1491-1495, 2002.
Artigo
em Inglês
| WPRIM
| ID: wpr-282157
ABSTRACT
<p><b>OBJECTIVE</b>To understand the possible pathogenesis of sporadic multiple system atrophy (MSA).</p><p><b>METHODS</b>The immunoreactivity and ultrastructural features of glial cytoplasmic inclusions (GCIs) in 12 autopsy patients with MSA and 4 normal control groups were studied. All regional sections from each subject were evaluated with HE staining, Klüver-Barrera (KB), Holzer's, modified Gallyas-Braak's (GB) methods and immunohistochemical staining with alpha-synuclein and ubiquitin antibodies. Pontine white matter with abundant GCIs from case 1 was examined, using conventional electron microscopy, Gallyas-Braak's electron microscopy and immunoelectron microscopy.</p><p><b>RESULTS</b>The presence of GCIs as constantly demonstrated in all MSA patients. Strong alpha-synuclein immunoreactivity was observed in all of the ubiquitinated GCIs. However, the density of alpha-synuclein positive GCIs differed from case to case, and there was no relationship between the density of GCIs and age, sex, or MSA subtype. Ultrastructural features indicated that argyrophilic granule-associated filaments of about 25 nm in diameter were the predominant constituents of GCIs, and the anti alpha-synuclein antibody selectively labeled in these filaments. No GCIs and alpha-synuclein immunoreaction were found in control brain tissues.</p><p><b>CONCLUSIONS</b>GCI was a pathognomonic change in sporadic MSA patients. Accumulation of alpha-synuclein in GCIs may occur during the early stags of MSA. Seletcive alpha-synuclein positive abnormal microtubules in GCIs therefore play an important role in the pathogenesis of MSA.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Imuno-Histoquímica
/
Corpos de Inclusão
/
Neuroglia
/
Microscopia Imunoeletrônica
/
Atrofia de Múltiplos Sistemas
/
Sinucleínas
/
Alfa-Sinucleína
/
Metabolismo
/
Proteínas do Tecido Nervoso
Limite:
Idoso
/
Aged80
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Chinese Medical Journal
Ano de publicação:
2002
Tipo de documento:
Artigo
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