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Science News for October 14, 2002


Allergic to your DNA?

Researchers found that ICAD-deficient flies lack apoptotic DNA fragmentation due to impaired CAD protein expression. Meanwhile, DNase II-deficient flies accumulate fragmented DNA and trigger an immune response. This study reveals a crucial role for innate immunity in apoptotic DNA degradation.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateOct 14, 2002

Study backs theory that accumulating mutations of 'quiet' genes foster aging

The study provides strongest support for mutation accumulation (MA) theory, proposing that aging results from accumulated mutations of genes kept in check early in life. This theory suggests that genes associated with diseases like Huntington's and cancer have noticeable effects late in life.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalProceedings of the National Academy of Sciences·DateOct 14, 2002

MRI can predict risk of heart attacks

A new study published by the American Heart Association found that MRI stress tests can predict fatal and nonfatal heart attacks in patients with certain conditions. The study used MRI stress tests on 279 men and women referred for further testing after initial ultrasound screenings were inconclusive.