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Autoimmune Diseases-Women
This image provided by National Institutes of Health (NIH) shows the X and Y chromosomes. Women are far more likely than men to get autoimmune diseases, illnesses like lupus or rheumatoid arthritis that occur when the immune system mistakenly attacks their own tissues. That gender disparity has baffled scientists for decades but new research may finally explain why. (Jonathan Bailey/National Institutes of Health (NIH) via AP)

Lupus and other autoimmune diseases strike far more women than men. Now there's a clue why

Women are far more likely than men to get autoimmune diseases, illnesses like lupus or rheumatoid arthritis that occur when the immune system mistakenly attacks their own bodies

By LAURAN NEERGAARD
Published - Feb 01, 2024, 11:50 AM ET
Last Updated - Feb 01, 2024, 11:50 AM EST

WASHINGTON (AP) — Women are far more likely than men to get autoimmune diseases, when an out-of-whack immune system attacks their own bodies — and new research may finally explain why.

It’s all about how the body handles females’ extra X chromosome, Stanford University researchers reported Thursday — a finding that could lead to better ways to detect a long list of diseases that are hard to diagnose and treat.

“This transforms the way we think about this whole process of autoimmunity, especially the male-female bias,” said University of Pennsylvania immunologist E. John Wherry, who wasn’t involved in the study.

More than 24 million Americans, by some estimates up to 50 million, have an autoimmune disorder — diseases such as lupus, rheumatoid arthritis, multiple sclerosis and dozens more. About 4 of every 5 patients are women, a mystery that has baffled scientists for decades.

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