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Growth and DNA Damage-Inducible Transcription Factor 153 Mediates Apoptosis in Response to Fenretinide but Not Synergy between Fenretinide and Chemotherapeutic Drugs in Neuroblastoma

Lookup NU author(s): Professor Penny Lovat, Professor Andrew Pearson, Dr Chris Redfern

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Abstract

Fenretinide induces apoptosis of neuroblastoma cells in vitro and interacts synergistically with the chemotherapeutic drugs cisplatin and etoposide. The stress-inducible transcription factor known as growth and DNA damage (GADD)-inducible transcription factor 153 is induced in response to fenretinide and in other cell types modulates apoptosis via pro- and antiapoptotic members of the BCL2 family. Because BCL2-family proteins are important in apoptosis induced by chemotherapeutic drugs, GADD153 may be a key mediator of synergy between fenretinide and chemotherapeutic drugs. To investigate this, GADD153 cDNA in sense and antisense orientations was stably transfected into SH-SY5Y neuroblastoma cells using a tetracycline-inducible vector. Increased expression of GADD153 raised the background level of apoptosis and increased apoptosis induced by fenretinide or the chemotherapeutic drugs cisplatin and etoposide. However, there was no increase in synergy between fenretinide and chemotherapeutic drugs. Conversely, expression of antisense-GADD153 virtually abolished the induction of apoptosis in response to fenretinide but overall had no significant effect on apoptosis induced by chemotherapeutic drugs. The effect of antisense-GADD153 on synergy between chemotherapeutic drugs and fenretinide varied with the drug used: there was no effect on synergy between fenretinide and cisplatin, but the combination of fenretinide with etoposide became antagonistic. These results suggest that mechanisms mediating synergy between fenretinide and chemotherapeutic drugs lie upstream of GADD153.


Publication metadata

Author(s): Corazzari, M., Lovat, P.E., Oliverio, S., Pearson, A.D.J., Piacentini, M., Redfern, C.P.F.

Publication type: Article

Publication status: Published

Journal: Molecular Pharmacology

Year: 2003

Volume: 64

Issue: 6

Pages: 1370-1378

Print publication date: 01/12/2003

ISSN (print): 0026-895X

ISSN (electronic): 1521-0111

URL: http://dx.doi.org/10.1124/mol.64.6.1370

DOI: 10.1124/mol.64.6.1370

PubMed id: 14645667


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