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Ouabain-Induced Signaling and Cell Survival in SK-N-SH Neuroblastoma Cells Differentiated by Retinoic Acid.
Akkuratov, Evgeny E; Wu, Jian; Sowa, David; Shah, Zahoor A; Liu, Lijun.
Afiliação
  • Liu L; Department of Biochemistry and Cancer Biology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH, USA. lijun.liu@utoledo.edu.
CNS Neurol Disord Drug Targets ; 14(10): 1343-9, 2015.
Article em En | MEDLINE | ID: mdl-26295826
UNLABELLED: Ouabain stimulates activation of various signaling cascades such as protein kinase B (Akt) and Extracellular-signaling-regulated kinase 1/2 (ERK 1/2) in various cell lines. Retinoic acid (RA) is commonly used to induce neuroblastoma differentiation in cultures. Upon RA administration, human neuroblastoma cell line, SK-N-SH demonstrated neurite extensions, which is an indicator of neuronal cell differentiation. Here we report that ouabain-induced signaling is altered under the action of 1 µM RA in human neuroblastoma SK-N-SH cells. RA increased the expression of p110α subunit of phosphoinositide 3-kinase (PI3K), Akt and ß1 subunit of Na(+)/K(+)-ATPase. Ouabain activated Akt and ERK 1/2 in differentiated SK-N-SH cells; this effect was not observed in non-differentiated SK-N-SH cells. Long-term incubation of non-differentiated SK-N-SH with 1 µM ouabain led to a decrease in the number of cells; this effect was reduced in differentiated SK-N-SH cells. Taken together, these results suggest that ouabain leads to cell death in neuroblastoma cells rather than neuronal cells due to the different response to ouabain manifested by activation of Akt and ERK 1/2. HIGHLIGHTS: • RA increases the expression of p110α subunit of PI3K, Akt and ß1 subunit of Na(+)/K(+)-ATPase • Ouabain induces activation of Akt and ERK 1/2 in differentiated SK-N-SH cells but not in non-differentiated cells • 1 µM ouabain leads to a decrease in the number of cells in non-differentiated SK-N-SH • Reduction of ouabain-induced cell death in differentiated SK-N-SH.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ouabaína / Tretinoína / Neuroblastoma / Neurônios / Antineoplásicos Limite: Humans Idioma: En Revista: CNS Neurol Disord Drug Targets Assunto da revista: NEUROLOGIA / TERAPIA POR MEDICAMENTOS Ano de publicação: 2015 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ouabaína / Tretinoína / Neuroblastoma / Neurônios / Antineoplásicos Limite: Humans Idioma: En Revista: CNS Neurol Disord Drug Targets Assunto da revista: NEUROLOGIA / TERAPIA POR MEDICAMENTOS Ano de publicação: 2015 Tipo de documento: Article