University of Michigan study shows Avastin, Sutent increase breast cancer stem cells:

Cancer treatments designed to block the growth of blood vessels were found to increase the number of cancer stem cells in breast tumors in mice, suggesting a possible explanation for why these drugs don’t lead to longer survival, according to a new study by researchers at the University of Michigan Comprehensive Cancer Center. The drugs Avastin and Sutent have been looked at as potential breast cancer treatments. But while they do shrink tumors and slow the time till the cancer progresses, the effect does not last, and the cancer eventually regrows and spreads.

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Among the research institutions NCI funds across the United States, it currently designates 66 as Cancer Centers. Largely based in research universities, these facilities are home to many of the NCI-supported scientists who conduct a wide range of intense, laboratory research into cancer’s origins and development. The Cancer Centers Program also focuses on trans-disciplinary research, including population science and clinical research. The centers’ research results are often at the forefront of studies in the cancer field.