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Enzyme Study may Help Reduce Heart Failure in Cancer Patients

by Sheela Philomena on February 11, 2011 at 10:52 AM
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 Enzyme Study may Help Reduce Heart Failure in Cancer Patients

A major cancer breakthrough by scientists of Queen's University could prevent heart failure in cancer patients and increase survival rates. Scientists have discovered the role of an enzyme, which plays a key role in causing life threatening damage to the heart when a patient receives chemotherapy.

This has, until now, restricted the amount of chemotherapy doses a patient can receive; but while protecting the heart, this dilutes the chemotherapy's effectiveness in destroying cancerous tumors.By identifying the role of the enzyme - NADPH oxidase - work can now go ahead into making chemotherapy treatments more effective and reduce the toxic effects of cancer treatment on the heart.

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Dr David Grieve, jointly leading on the research at Queen's School of Medicine, Dentistry and Biomedical Sciences said: "While chemotherapy drugs are highly effective in treating a wide range of tumors, they can also cause irreversible damage to the heart. This means that doctors are restricted in the doses they can administer to patients. In recent years, scientists have been searching for new drugs to prevent these side-effects."Although we have known about the NADPH oxidase enzyme for many years, until now, we were not aware of its crucial role in causing heart damage associated with chemotherapy.

Our research findings hold clear potential for the creation of new drugs to block the action of the enzyme, which could significantly reduce heart damage in cancer patients. "Ultimately, this could allow for the safer use of higher doses of chemotherapy drugs and make the treatment more effective against tumors. Despite improved treatments, cancer is currently responsible for 25 per cent of all mortality in the western world. By reducing the risk of heart failure associated with chemotherapy, patient survival rates could be significantly increased."Scientists at Queen's are now concentrating their efforts on further studies to define the precise role of NADPH oxidase in the development of heart failure associated with cancer therapies. It is hoped that these may lead to the development of a drug which would have the potential to save lives among cancer patients.

Source: Eurekalert
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