TROPICAL DISEASE:
Misspelled Gene Tames Malaria
Deborah Hill
Researchers have tied malaria resistance to a subtle variation in a single gene that can cut by nearly 90% the risk that an infection will become life-threatening. The gene mutation causes people to ratchet up production of nitric oxide (NO). Previous studies with rodents had found that NO can protect against malaria and a variety of other diseases. But the new study provides some of the best evidence to date that NO plays an important role in disease protection in humans.