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Cancer therapy may be too targeted
Date:3/16/2014

Researchers have identified two novel cancer genes that are associated with the development of a rare, highly aggressive, cancer of blood vessels. These genes may now act as markers for future treatments and explain why narrowly targeted therapies that are directed at just one target fail.

Angiosarcoma is a rare cancer of blood vessels. It occurs either spontaneously or can appear after radiotherapy treatment. Although quite rare, with approximately 100 people diagnosed with the cancer in the UK each year, the survival outcomes for the cancer are poorer than many other cancer types.

Scientists have previously developed drugs against angiosarcoma that target specific cellular pathways involved in the formation of blood vessels. However, these drugs have had little or no success.

In this study, the team found that 40 per cent of angiosarcomas carry mutations in genes that control blood vessel growth, including two novel cancer genes, PTPRB and PLCG1.

"Because this cancer doesn't respond well to traditional chemotherapy and radiotherapy, it makes sense to develop drugs that target pathways that control blood vessel formation," says Dr Peter Campbell, co-lead author from the Wellcome Trust Sanger Institute "We found two novel cancer genes that control blood vessel formation which are mutated in this cancer and which could be targeted for treatment of this highly aggressive cancer."

However, in some patients, the team found multiple mutations in the pathway that controls blood vessel growth. These multiple mutations may make drugs developed for a single target ineffective in some patients. This study emphasises the need to take into account the effects multiple, co-operating mutations can have when designing targeted treatments for patients.

"This indicates that we may need to think more broadly to find a suitable treatment," adds Dr Campbell.

"This study really highlights the power that a limited numb
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Contact: Mary Clarke
press.office@sanger.ac.uk
44-012-234-95328
Wellcome Trust Sanger Institute
Source:Eurekalert

Page: 1 2

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