July 28, 1990 |
A genetic mutation in small, energy-producing bodies called mitochondria is the cause of a rare form of epilepsy called myoclonic epilepsy, a Georgia scientist has found. The discovery marks the first time that a biological and genetic mechanism for such a brain disorder has been worked out in detail, geneticist Douglas Wallace of Emory University said in a telephone interview Friday. This discovery "is very exciting . . .
July 28, 1990 |
More than 95% of all North and South American Indians are descended from a small band of hardy pioneers that included perhaps as few as four women, who crossed the Bering Strait from Asia between 15,000 and 30,000 years ago, according to new studies of the American Indians' genetic inheritance. Their descendants spread out to become tribes as disparate as the Algonquins of the U.S.
November 16, 2009 |
If every "miracle" weight-loss product really did the job, people everywhere would be cinching up their belts, gyms would become eerily quiet and TV stations would soon run out of B-roll footage of big bellies at the mall. Clearly, some weight-loss products fall short of their claims. But how can you spot the scams? The Federal Trade Commission has some basic guidelines: Don't trust any product that claims to work for everyone or anything that supposedly helps you lose more than 2 pounds in a week.
October 22, 1999 |
Caltech scientists report some of the most convincing evidence yet that aging is tightly linked to genetic mutations in the small compartments where cells manufacture their energy. The results, published today in the journal Science, lend strong support to a decade-old theory of how people age that centers on mitochondria, the tiny power generators in all cells.
CALIFORNIA | LOCAL
February 24, 1992 |
Imagine Los Angeles with half its power plants shut down. At best, such conditions would produce a "brownout," with large sections of the city working far below optimum efficiency. At worst, traffic lights would blink out, leaving arteries clogged; the computers vital to the city's activities would go off-line and communications would be severely impaired, leaving the entire city rudderless. Now imagine your body with three-quarters of its energy-producing factories shut down. The brain would be impaired, vision would dim, muscles would twitch spastically, the heart would weaken and the liver would be impaired.
May 7, 2005 |
Mice genetically engineered to produce above-normal levels of an antioxidant in their mitochondria lived about 20% longer -- an extra 5 months -- researchers from the University of Washington reported this week in the journal Science. The researchers cited the findings as evidence that antioxidants can counteract the effects of aging and disease. Mitochondria are the cell's powerhouses, and the extra antioxidant was only effective there.