Searching for a Breast Cancer Vaccine

Nov. 13, 2008— -- Ingrid Eikineas, of South Hingham, Mass., was only 35 years old when doctors told her last year that she had breast cancer. The disease had already spread to her bones and liver. It was that aggressive.

"The message was: start talking to your kids about not being around," she said. 

But Ingrid had other ideas.  She began extensive treatment, including radiation and chemotherapy. After a year of treatment, amazingly, she has no signs of cancer. 

To stay cancer-free, she still takes the drug Herceptin. But she knows that eventually, in most women, the drug stops working and the cancer returns.   

"So we know that day is coming," she said. "So in anticipation of that, we try to be a step ahead of the game." 

For Ingrid, that meant testing an experimental breast cancer vaccine, which tries to use her own immune system to target and kill breast cancer cells whenever they might re-appear. 

Click here for information on clinical trials.

"I'm enthused about this vaccine because it targets a protein that is actually involved in causing the cancer," said Dr. Norah Disis, associate professor of medicine in the Division of Oncology at University of Washington and lead investigator of the vaccine's latest clinical trial.  

The vaccine targets a protein specific to "HER-2 positive" breast cancers, which accounts for roughly 25 percent of all breast cancer in the United States. This month, Ingrid received the first of six shots. 

"This vaccine stimulates the type of immune response that creates inflammation, or a danger signal, at the site of the tumor and allows the tumor to appear more foreign to the immune system and create a vigorous immune response" Disis told ABC News.