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Patient Selection For Specific Prostate Cancer Treatment Now Made Easy

by Rishika Gupta on May 11, 2018 at 5:44 PM
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 Patient Selection For Specific Prostate Cancer Treatment Now Made Easy

By identify possible ways for measuring hypoxia in prostate cancer patients using gene signatures, men with locally advanced prostate cancer can be identified, finds a new study. This is an important finding because patients who are less likely to respond well to radiotherapy can be identified early on. The findings of this study are published in the EBioMedicine.

Led by Professor Catharine West, The University of Manchester team created a method of selecting prostate cancer patients who would benefit from treatments which target oxygen deficient tumors. Tumour hypoxia is associated with a poor prognosis in prostate cancer: the lower the oxygen, the greater the resistance to treatment and the more likely a tumor will spread. The researchers identified a 28-gene signature, which accurately identifies hypoxic tumor tissue in patients with prostate cancer which invades nearby structures. The signature was derived using analysis of human cells in the lab and patient survival data.

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The signature was validated using data from across the world in eleven prostate cancer cohorts and a bladder cancer phase III randomized trial of radiotherapy.

According to cancer.net, the 5-year survival rate for most men with local prostate cancer is almost 100%. 98% are alive after 10 years, and 96% live for at least 15 years.
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For men diagnosed with prostate cancer that has spread nearby, the 5-year survival is around 70%. For men diagnosed with prostate cancer that has spread to other parts of the body, the 5-year survival rate is 29%.

According to Cancer Research UK, over 11,000 still die from the disease every year. In 2014, 13% of all male cancer deaths were from prostate cancer.

Professor West is based at the Manchester Cancer Research Centre- a world-renowned partnership between The University of Manchester, The Christie NHS Foundation Trust and Cancer Research UK.

She said: "Ninety percent of prostate cancer patients are diagnosed with localized cancer, which have a highly variable course of disease progression.

"And we know that combining hypoxia-targeting treatment with radiotherapy has been shown to improve local control of tumors and survival of patients in head and neck and bladder cancers."

She added: "This study has built on work to identify possible ways for measuring hypoxia in prostate cancer using gene signatures.

"Until now, there has been no clinically validated method of selecting prostate cancer patients who would benefit from hypoxia modifying treatment.

"Though there is some way to go before this can be used clinically, it's a significant development and could signal a new phase in treating this disease within a few years."

Source: Eurekalert
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