| FRA16D common chromosomal fragile site oxido-reductase (FOR/WWOX) protects against the effects of ionizing radiation in Drosophila (2005) | |||||||||||||
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| Fragile sites are chromosomal structures that have been proposed to have a determining role in cancer associated DNA instability. The human WWOX gene spans the FRA16D chromosomal fragile site, the common minimal region of homozygous deletion found in adenocarcinomas, and three out of five translocation breakpoints in multiple myeloma. Transcripts from the alternatively spliced WWOX gene encode proteins with common N-terminal WW domains and variable homology to the oxido-reductase family of proteins. In this study, the Drosophila orthologue of the WWOX gene was identified and subjected to mutagenesis via homologous recombination. The resultant DmWWOX mutants were viable but exhibited an increased sensitivity to ionizing radiation. This radiation sensitivity was rescued by re-introduction and expression of either the wild-type Drosophila or human WWOX genes. Thus the protective function of DmWWOX in response to irradiation in Drosophila is conserved with human WWOX. This is consistent with a protective role for human WWOX where aberrant expression, as a result of breakage at the associated fragile site, could contribute directly to cancer progression.. http://www.asbmb.org.au/combio2005/abstracts/edited/OKEEFE-20050624231342.rtf | |||||||||||||
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