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Hospital researchers identify gene important in certain cancers

Researchers at the Womens and Childrens Hospital, Adelaide have identified the FOR gene located on chromosome 16. This gene was found to have an important role in controlling when cells should divide.

Associate Professor Rob Richards who heads this research team at the hospital says, Mutations in certain genes are critical in causing cancer. Specific areas on our chromosomes are unstable in cancer cells and genetic material is thought to be particularly unstable in regions known also as fragile sites.

Of the 100 or so fragile sites in the human genome, we now know that one, the FRA16D fragile site, can be deleted in cancers of the stomach, colon, lung, breast and ovary.

Our team has sequenced this fragile site and identified the FOR gene (short for Fragile Site OxidoReductase) as the main area of instability in the DNA (1,2). The FOR gene was found to code for multiple proteins. The gene is affected in various cancers including some cases of multiple myeloma, Associate Professor Richards says.

Following on from the Womens and Childrens Hospitals identification of the FOR gene, a US research group(3)has found a function for one of the proteins produced by the FOR gene. The US studies have shown that one of these proteins enables cells to be more readily killed by tumour necrosis factor produced by the human body in response to infection and other conditions. If this FOR protein is not being produced, tumour cells are more likely to escape killing by the bodys defences.

This same FOR protein was also found to be an essential partner to a second protein called p53 also involved in cancer. The p53 helps monitor DNA damage and puts a brake on cell division to enable the mutation to be repaired before the cell continues dividing. In this way mutations are not passed onto offspring cells. If either this FOR protein or p53 are absent due to deletion/mutation of their respective genes, then mutated cells can divide and proliferate unchecked, all
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Contact: Dr Edna Bates
batese@wch.sa.gov.au
618-8204- 7388
Women's and Children's Hospital, Adelaide - Part of the Children, Youth and Women's Health Service
4-Mar-2001


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