Subcellular localization of ataxin-3 and its effect on the morphology of cytoplasmic organoids / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 353-357, 2015.
Artigo
em Chinês
| WPRIM
| ID: wpr-239471
ABSTRACT
<p><b>OBJECTIVE</b>To explore the subcellular localization of ataxin-3 and the effect of polyglutamine (polyQ) expansion mutation on the morphology of mitochondrion, golgi apparatus and endoplasmic reticulum.</p><p><b>METHODS</b>Transient transfection was employed to build cell models expressing wild-type or mutant ataxin-3 proteins. Indirect immunofluorescence was applied to identify markers of organelle membrane. The results were observed under a laser scanning confocal microscope.</p><p><b>RESULTS</b>No co-localization was observed for ataxin-3 protein and mitochondrial marker TOM20, but the percentage of cells with mitochondrial fragmentation has increased in cells expressing mutant ataxin-3 (P<0.05). No co-localization was observed for ataxin-3 protein and golgi marker GM130, and mutant ataxin-3 did not cause golgi fragmentation. Wide type and polyQ-expanded ataxin-3 both showed partial co-localization with ER marker calnexin. The latter showed more overlap with calnexin, and the overlapping signals were mostly located in the places where aggregates were situated.</p><p><b>CONCLUSION</b>PolyQ-expanded ataxin-3 protein may indirectly affect the integrity of mitochondria, but may cause no effect on the structure and functions of golgi apparatus. Endoplasmic reticulum may be another place where extended ataxin-3 protein can induce cytotoxicity in addition to the nucleus.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Proteínas Repressoras
/
Proteínas Nucleares
/
Células HeLa
/
Doença de Machado-Joseph
/
Transporte Proteico
/
Citoplasma
/
Retículo Endoplasmático
/
Ataxina-3
/
Genética
/
Metabolismo
Tipo de estudo:
Estudo prognóstico
Limite:
Humanos
Idioma:
Chinês
Revista:
Chinese Journal of Medical Genetics
Ano de publicação:
2015
Tipo de documento:
Artigo
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