Title : Etoposide sensitizes neuroblastoma cells expressing caspase 8 to TRAIL.

Pub. Date : 2012 Jun 21

PMID : 23124518






7 Functional Relationships(s)
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1 Etoposide sensitizes neuroblastoma cells expressing caspase 8 to TRAIL. Etoposide TNF superfamily member 10 Homo sapiens
2 We provide evidence that pretreatment with etoposide significantly enhanced TRAIL-mediated apoptosis via up-regulation of DR5 (death receptor 5 or TRAIL-R2) expression in the caspase 8 expressing neuroblastoma cell line, SK-N-MC. Etoposide TNF superfamily member 10 Homo sapiens
3 In addition, sequential treatment with etoposide and TRAIL increased caspases 8, 9 and 3 activation, Mcl-1 cleavage and Bid truncation, which suggests that the ability of etoposide and TRAIL to induce apoptosis is mediated through activation of an intrinsic signalling pathway. Etoposide TNF superfamily member 10 Homo sapiens
4 In addition, sequential treatment with etoposide and TRAIL increased caspases 8, 9 and 3 activation, Mcl-1 cleavage and Bid truncation, which suggests that the ability of etoposide and TRAIL to induce apoptosis is mediated through activation of an intrinsic signalling pathway. Etoposide TNF superfamily member 10 Homo sapiens
5 Although TRAIL-R2 expression increased in IMR-32 cells in response to etoposide treatment, cell death was not increased by concurrent treatment with TRAIL compared with etoposide alone, because the cells lacked caspase 8 expression. Etoposide TNF superfamily member 10 Homo sapiens
6 Moreover, pretreatment with etoposide increased TRAIL-induced apoptosis in caspase 8 restored IMR-32 cells through activation of a caspase cascade that included caspases 8, 9 and 3. Etoposide TNF superfamily member 10 Homo sapiens
7 These results indicate that the etoposide-mediated sensitization of neuroblastoma cells to TRAIL is associated with an increase in TRAIL-R2 expression and requires caspase 8 expression. Etoposide TNF superfamily member 10 Homo sapiens