| Registro completo |
| Provedor de dados: |
Biol. Res.
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| País: |
Chile
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| Título: |
Possible link of different slow calcium signals generated by membrane potential and hormones to differential gene expression in cultured muscle cells
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| Autores: |
JAIMOVICH,ENRIQUE
ESPINOSA,ALEJANDRA
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| Data: |
2004-01-01
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| Ano: |
2004
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| Palavras-chave: |
Skeletal
Transcription factors
Insulin
IGF-I
Testosterone
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| Resumo: |
We studied the effect of IGF-I, insulin and testosterone on intracellular Ca2+ in cultured muscle cells. Insulin produced a fast (<1 s) and transient [Ca2+] increase lasting less than 10 s. IGF-I induced a transient [Ca2+] increase, reaching a fluorescence peak 6 s after stimulus, to return to basal values after 60 s. Testosterone induced delayed (35 s) and long lasting (100-200 s) signals, frequently associated with oscillations. IGF-I, testosterone and electrical stimulation-induced Ca2+ signals were shown to be dependent on IP3 production. All of these Ca2+ signals were blocked by inhibitors of the IP3 pathway. On the other hand, insulin-induced Ca2+ increase was dependent on ryanodine receptors and blocked by either nifedipine or ryanodine. The different intracellular Ca2+ patterns produced by electrical stimulation, testosterone, IGF-I and insulin, may help to understand the role of intracellular calcium kinetics in the regulation of gene expression by various stimuli in skeletal muscle cells.
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| Tipo: |
Journal article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000400018
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| Editor: |
Sociedad de Biología de Chile
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| Formato: |
text/html
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| Fonte: |
Biological Research v.37 n.4 2004
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