A drug that scientists believe could revolutionise treatment for advanced skin cancer is to be trialled in the UK, reports The Guardian.
Laboratory tests suggest that the drug, known as a pan-RAF inhibitor, is likely to be effective in melanoma patients who are no longer responding to existing treatments. It might also help people with a strain of cancer that cannot be treated with standard drugs.
The new drugs, which target a wider range of biological pathways, have been shown to halt the growth of resistant tumours. They also appear to work against the 20-25% of melanomas driven by a different defective protein, RAS.
Prof Caroline Springer, from the Institute of Cancer Research in London, who co-led a study of the new drugs, said: "Melanomas often respond initially to the current generation of treatments, but they inevitably acquire resistance to them and there is a desperate need for more effective options.
"Our new inhibitors are the first in a new family of drugs that attack cancers without allowing them the get-out clause of drug resistance, by blocking multiple cancer proteins at once. We are very hopeful that clinical trials from this series of new inhibitors will begin very soon – and that they will ultimately become new first- or second-line options for patients who, at the moment, exhaust all the available treatments and end up with fatal disease."
Prof Richard Marais, director of the Cancer Research UK Manchester Institute, based at the University of Manchester, said: "Our laboratory study showed that these new drugs deliver multiple blows to cancer by hitting several cell survival routes at once. It's a step on from the drugs that are currently available, which can’t multitask in this way.
"The next step is testing this family of drugs in clinical trials to establish that they are both safe and effective in cancer patients, potentially providing urgently-needed new treatments for patients who have run out of options."
The phase-I trial is likely to involve a small number of patients and focus mainly on safety and dosage, although it might also produce some data about the drug’s effectiveness.
Assuming the results are positive, further larger trials will look more closely at how well the drug performs. Few details of the trial are available at this stage, and the number of patients due to take part is yet to be determined. But Springer said funding had been agreed and an application made for ethical approval.
[link url="http://www.theguardian.com/society/2015/jan/02/skin-cancer-drug-clinical-trials-melanoma"]Full report in The Guardian[/link]
[link url="http://www.cell.com/cancer-cell/abstract/S1535-6108(14)00457-7"]Cancer Cell article summary[/link]