DFNA5 (ICERE-1) contributes to acquired etoposide resistance in melanoma cells
Resistance to drug treatment is a common observation in malignant melanoma. In order to analyze alterations in mRNA expression profiles associated with drug resistance in melanoma cells we previously established a panel of various drug-resistant cell variants derived from the human melanoma line MeW...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
4 April 2001
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| In: |
FEBS letters
Year: 2001, Jahrgang: 494, Heft: 1, Pages: 54-59 |
| ISSN: | 1873-3468 |
| DOI: | 10.1016/S0014-5793(01)02304-3 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/S0014-5793(01)02304-3 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0014579301023043 
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| Verfasserangaben: | Hermann Lage, Heike Helmbach, Claudia Grottke, Manfred Dietel, Dirk Schadendorf |
MARC
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| 520 | |a Resistance to drug treatment is a common observation in malignant melanoma. In order to analyze alterations in mRNA expression profiles associated with drug resistance in melanoma cells we previously established a panel of various drug-resistant cell variants derived from the human melanoma line MeWo and compared the mRNA expression profiles by a differential display technique. By that approach it could be demonstrated that the expression level of a mRNA encoded by a gene found to be mutated in non-syndromic hearing impairment, DFNA5 (ICERE-1), was distinctly decreased in the 33-fold etoposide-resistant melanoma cell line MeWo ETO 1. To evaluate the hypothesis that a decrease in DFNA5 mRNA expression level contributes to the acquired etoposide resistance phenotype exhibited by MeWo ETO 1 cells, this drug-resistant line was stably transfected with the DFNA5-encoding cDNA. Transfected clones showed a 30-35% reduced etoposide susceptibility by comparing the IC25, IC50 and IC75 values of these clones with those displayed by the non-transfected, etoposide-resistant melanoma cell line MeWo ETO 1 and controls. Furthermore, etoposide exposure of stable DFNA5 transfectants resulted in an increase of caspase-3-mediated apoptotic events in DFNA5-transfected clones in comparison to MeWo ETO 1 cells and controls. The data therefore demonstrate that a decrease in DNFA5 mRNA expression level is associated with an increased etoposide resistance in melanoma cells due to an elevated cellular susceptibility to trigger a caspase-3-depending signal pathway leading to programmed cell death. | ||
| 650 | 4 | |a Apoptosis | |
| 650 | 4 | |a Drug resistance | |
| 650 | 4 | |a Malignant melanoma | |
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