In order to avoid destruction by the immune system, cancer cells play some small tools. When they split to form tumors, will avoid perceived macrophages, macrophages are engaged eliminate dead cells and dangerous invaders immune cells. Now, many cancer patients are treated using the antibody drug, some of these effects is to identify an antibody drug of tumor cells to allow the macrophages to destroy them. Although these drugs can prolong the lives of patients, but they are not always very effective - in part because cancer cells to immune cells by sending a "do not eat me" signal to fight back.
Now, researchers have devised in mice a small protein, it can cut off the signal, and can greatly improve the effectiveness of the antibody drug to the tumor to shrink. Stem cell biologist at Stanford University in Palo Alto, Calif. The Irving Weissman has been studying the spread of a charge of "Do not eat me" protein signal. The protein, called CD47, which protects cancer cells from leukemia cells and other macrophage phagocytosis. Last year, the research team reported Weissman said, a blocking CD47 antibody in tumor cells can stimulate macrophages to destroy tumors in mice. California Institute for Regenerative Medicine will provide $ 20 million fund in the near future for this anti-CD47 antibody testing in humans safety.
Although this method has potential, but this antibody also has certain disadvantages - the relatively large size limits their ability to penetrate tumors. In addition, they exist side effects, so the team Weissman Christopher Garcia and structural biologist at Stanford University in the laboratory of co-blocking CD47 tested another way. Garcia's team and Weissman recently in the journal "Science" describes the online version of their new research.
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Posted at 2014/09/17 13:20:16 | |
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