GDF11 Modulates Ca2+-Dependent Smad2/3 signaling to prevent cardiomyocyte hypertrophy
Author
dc.contributor.author
Durán, Javier
Author
dc.contributor.author
Troncoso, Mayarling Francisca
Author
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Lagos, Daniel
Author
dc.contributor.author
Ramos, Sebastian
Author
dc.contributor.author
Marin, Gabriel
Author
dc.contributor.author
Estrada, Manuel
Admission date
dc.date.accessioned
2018-11-06T20:00:01Z
Available date
dc.date.available
2018-11-06T20:00:01Z
Publication date
dc.date.issued
2018-05
Cita de ítem
dc.identifier.citation
International Journal of Molecular Sciences Volumen: 19 Número: 5 Número de artículo: 1508
es_ES
Identifier
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10.3390/ijms19051508
Identifier
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https://repositorio.uchile.cl/handle/2250/152432
Abstract
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Growth differentiation factor 11 (GDF11), a member of the transforming growth factor- family, has been shown to act as a negative regulator in cardiac hypertrophy. Ca2+ signaling modulates cardiomyocyte growth; however, the role of Ca2+-dependent mechanisms in mediating the effects of GDF11 remains elusive. Here, we found that GDF11 induced intracellular Ca2+ increases in neonatal rat cardiomyocytes and that this response was blocked by chelating the intracellular Ca2+ with BAPTA-AM or by pretreatment with inhibitors of the inositol 1,4,5-trisphosphate (IP3) pathway. Moreover, GDF11 increased the phosphorylation levels and luciferase activity of Smad2/3 in a concentration-dependent manner, and the inhibition of IP3-dependent Ca2+ release abolished GDF11-induced Smad2/3 activity. To assess whether GDF11 exerted antihypertrophic effects by modulating Ca2+ signaling, cardiomyocytes were exposed to hypertrophic agents (100 nM testosterone or 50 M phenylephrine) for 24 h. Both treatments increased cardiomyocyte size and [H-3]-leucine incorporation, and these responses were significantly blunted by pretreatment with GDF11 over 24 h. Moreover, downregulation of Smad2 and Smad3 with siRNA was accompanied by inhibition of the antihypertrophic effects of GDF11. These results suggest that GDF11 modulates Ca2+ signaling and the Smad2/3 pathway to prevent cardiomyocyte hypertrophy.
es_ES
Patrocinador
dc.description.sponsorship
Fondo Nacional de Ciencia y Tecnologia (FONDECYT)
1151118
CONICYT
CONICYT 21150881