Researchers discover fundamental step in immune-system development

Researchers at National Jewish Health have discovered a fundamental step in the development of the immune system, one that allows B cells to mature and fight disease by producing effective antibodies. Immunologist Roberta Pelanda, PhD, and her colleagues have demonstrated that immature B cells in the bone marrow must receive a positive signal before they can migrate to the spleen where they mature and are activated. In the March 15, 2010 issue of The Journal of Experimental Medicine, the researchers also reported that a protein known as Erk helps deliver that positive signal.

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