MTorrice writes: "Some biologists would like to train patients’ own immune systems to treat diseases such as cancer and autoimmune disorders. They envision isolating a person’s immune cells and then programming the cells to destroy tumors or to stop other parts of the immune system from attacking healthy tissue. Now a team of German researchers reports a method that traps immune cells in microscopic water droplets and exposes the cells to chemical signals that could teach them the difference between friend and foe. The droplets mimic the cellular environments in which immune cells typically trade information about what to attack."
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