Anti-apoptotic function of thymosin-beta in developing chick spinal motoneurons.
Biochem Biophys Res Commun
; 346(3): 872-8, 2006 Aug 04.
Article
em En
| MEDLINE
| ID: mdl-16782066
ABSTRACT
Thymosin-betas (Tbetas) are water-soluble peptides abundantly present in the cytoplasm and extracellular compartment. The functions of Tbetas appear to be pleiotrophic, including actin-remodeling, wound healing, angiogenesis, etc. In the present study, we present the evidence that Tbetas have anti-apoptotic activity on developing chick motoneurons (MNs) in vivo. Using in ovo electroporation, we introduced three isoforms of Tbeta (Tbeta4, Tbeta10, and Tbeta15) and found the significantly diminished normal and limb bud removal (LBR)-induced programmed cell death. Such anti-apoptotic activity is independent of Tbeta's actin remodeling activity. On the other hand, overexpression of Tbetas substantially reduced early cell death initiation signal, such as phosphorylation of c-Jun. Collectively, these results suggest that Tbetas may prevent apoptosis of neurons via blockade of early apoptogenic signals independent of actin remodeling action.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Medula Espinal
/
Timosina
/
Apoptose
/
Neurônios Motores
Limite:
Animals
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article