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Posted April 17, 2018 by venynx jack
Immunotherapy has gained ground against a stubborn opponent: ovarian cancer. A personalized cancer vaccine is safe and may lengthen the lives of ovarian cancer patients, a small clinical trial found.To get more health news, you can visit shine news official website.
The research, published Wednesday in the journal Science Translational Medicine, showed "significantly higher" overall survival at two years among patients who received the vaccine, compared with patients who did not.
Ovarian cancer is a "silent killer" because often it goes unnoticed until it is diagnosed at a late stage. Treated with surgery followed by chemotherapy, most patients -- 85% -- relapse and ultimately develop resistance to the chemo. At this point, they run out of treatment options. Still, scientists are hopeful based on the fact that a subset of patients shows an immune response to their cancer. Generally, these patients have better survival rates than those whose immune systems don't react in the same way.
A vaccine, then, might be able to trigger and boost the immune system and increase the survival rates of patients, said Dr. Lana Kandalaft, senior author of the new study and an adjunct assistant professor at the University of Pennsylvania Perelman School of Medicine.Testing this hypothesis, Kandalaft and her colleagues created "personalized" vaccines for 25 patients diagnosed with advanced recurrent ovarian cancer. The women had recurrent advanced epithelial ovarian cancer, which has an average five-year survival rate of 17%, according to the American Cancer Society.
The scientists made each unique vaccine using a patient's tumor (stored and preserved before surgery) and dendritic cells from her blood.
Within the immune system, dendritic cells act as clever spies. Their mission is to identify foreign invaders lurking in the shadowy interfaces between our bodies and the environment: the lining of our airways, for example, and the surface of our intestines. Once they discover a virus or a dangerous toxin, dendritic cells will capture and display fragments of the invader on their surfaces and then travel deep into the lymph nodes, where the immune system's killer T cells reside. The patients who received the vaccine mounted an immune response against their own tumors," Kandalaft said in a statement. She described the immune response as "an increased number of T cells which were specific to the tumor and were able to kill tumors."
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