AI Insight
Researchers have discovered that a genetic variant associated with increased risk of lupus, an autoimmune disease, may have persisted in human populations because it provides protection against viral infections. This finding suggests an evolutionary trade-off where the same mutation that makes the immune system more likely to attack the body's own tissues also enhances its ability to fight off viruses. The study provides insight into why disease-causing genetic variants remain common in populations despite their harmful effects.
Why it matters
This research helps explain the evolutionary persistence of autoimmune disease risk factors and could inform the development of new treatments for both lupus and viral infections. Understanding this genetic trade-off may lead to more targeted therapies that preserve beneficial immune responses while reducing autoimmune complications.
Understand the Science
An evolutionary trade-off may have helped a mutation linked to auto-immune disease persist in human populations
Source: Common gene variant that increases risk of lupus may protect against viruses