Early ischaemic preconditioning of spinal cord enhanced the binding profile of heat shock protein 70 with neurofilaments and promoted its nuclear translocation after thoraco-abdominal aortic occlusion in pigs.
Eur J Vasc Endovasc Surg
; 43(4): 408-14, 2012 Apr.
Article
em En
| MEDLINE
| ID: mdl-22285069
ABSTRACT
OBJECTIVE(S) Heat shock protein 70 (Hsp70) is detected in substantial amounts in normal neurons and this basal content may protect a cell against harmful conditions without the need for additional synthesis. Herein, we investigate the potential protective role of these basal levels of Hsp70, in an early ischaemic preconditioning (IPC) experimental model, suggesting a possible role of this protein as a first window of protection. DESIGN, MATERIAL AND METHODS:
Forty-two pigs were used in an experimental thoraco-abdominal aortic occlusion model. Twelve animals (two groups) were used for neurological evaluation. The remaining 30 animals (five groups) were used for immunoprecipitation and immunohistochemical studies. These were performed to study the binding relationship of Hsp70/cytoskeleton elements and the cellular distribution of Hsp70, respectively.RESULTS:
The IPC + ischaemia-group showed significant better neurologic scores compared with those of the ischaemia group, indicating a protective role for IPC (P = 0.003). The immunoprecipitations demonstrated that early IPC increased significantly the binding profile of Hsp70/neurofilaments (P = 0.025). In addition, translocation of Hsp70 into the nucleus was observed, which was conserved until the sustained ischaemia.CONCLUSIONS:
These results indicate that Hsp70 may have an important role in early IPC of the spinal cord, by protecting neurofilaments and by ensuring the functionality and the integrity of the nucleus, at the time the intensive insult begins.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Medula Espinal
/
Núcleo Celular
/
Proteínas de Choque Térmico HSP70
/
Precondicionamento Isquêmico
/
Neurônios
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Eur J Vasc Endovasc Surg
Assunto da revista:
ANGIOLOGIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Grécia
País de publicação:
ENGLAND
/
ESCOCIA
/
GB
/
GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
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UK
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UNITED KINGDOM