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Published on: 11/20/2002
Last Visited: 11/20/2002
The drug reduced tumors by half in several patients, which is a "very impressive response rate" considering that all these patients had failed on other cancer drugs and were terminally ill, Eric Raymond of Institut Gustave Roussy in Villejuif, France and principal investigator in the trial, told United Press International.Raymond presented the preliminary results of the study at the Symposium on Molecular Targets and Cancer Therapeutics sponsored by the European Organization for Research and Treatment of Cancer, the National Cancer Institute and the American Association for Cancer Research.
"The patients are getting much better," Raymond said.The patients in the trial had "huge tumors" that caused pain, fatigue, weight loss and other complications due to the tumor pressing on vital organs, he said."When you shrink the tumor by more than 50 percent you are relieving much of the symptoms and usually the patient tells you 'I am feeling better, I have less pain, I am not fatigued.'"
Raymond's team has not seen tumors disappear completely but that could happen as the study is not yet complete, he said, adding the trial is expected to conclude in May or June.
So far, the team has treated 28 patients who had any kind of solid tumor cancers -- of the lung, kidney, breast, colon and skin.All the patients had failed on at least three previous therapies considered standard care for their type of cancer.
Six of the patients experienced a tumor shrinkage of more than 50 percent, Raymond said.The main side effects were fatigue, turning the skin a golden color and turning the hair white because the drug interferes with pigment production.Hair and skin color return to normal when the drug is stopped.
Another concern is the drug might work too well, Raymond said.It can kill the tumor faster than the body can repair the resulting hole, which can lead to infection or other complications."The compound is very powerful ... so we have to be very careful not to make it too efficient too rapidly," he said.Raymond's team is working to develop the right dose and regimen to prevent that from happening.
He added the side-effect profile of the compound is better than current chemotherapy drugs used to treat cancer, which can cause severe toxicity in patients.
Despite the promising results, Raymond urged for tempered enthusiasm.This trial is the first step in assessing the utility of the drug and it is designed to primarily look at safety not efficacy, he said.A number of anti-angiogenic agents have appeared promising but "then they never prove to be beneficial" when used in patients, he said."I don't want to give too much expectation."