Scientists studying mice have identified a gene that allows immune cells known as neutrophils to protect themselves from the inflammatory chemicals they secrete. Researchers at Washington University School of Medicine in St. Louis showed that knocking the gene out in mice prevented the development of an arthritis-like disorder by making the neutrophils victims of their own damaging secretions. The newly identified role for the gene, Foxo3a, may open a new window for treating arthritic conditions caused by immune dysfunction. Currently, most treatments in development for these disorders focus either on preventing wayward immune cells from attacking the joints or on reducing the ability of these cells to open fire. The new results suggest it may be just as helpful to let these cells kill themselves and each other.
