linkurl:Autoimmune; diseases may not stem from defects in the immune system alone. Rather, developmental genetic abnormalities in organ tissues may make those organs more susceptible to autoimmune disorders, according to a linkurl:paper; published online today in Immunology and Cell Biology. "The former explanations of how these [autoimmune] diseases occur weren't totally satisfactory," linkurl:Denise Faustman; of Harvard Medical School, lead author of the study, told The Scientist. "Obviously the immune system plays a role, but maybe we should think about the target tissue more." Faustman and her colleagues examined the organs of nonobese diabetic (NOD) mice that developed autoimmune symptoms of pancreatic and salivary gland destruction. They found that these organs, while geographically far from each other, shared developmental abnormalities, and that their cell lineages all develop through the Hox11 transcription factor. She speculates that these organs are somehow predisposed to targeting by autoimmune diseases through their common lineage....

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