Curcumin, the yellow pigment in curry spice, is to be investigated for
its potential in prevention of Alzheimer's disease after tests on mice
found it to be more effective than drugs currently being investigated
A dietary staple of India, where Alzheimer's disease rates are
reportedly among the world's lowest, curcumin appears to block and break up brain plaques that cause the disease.
The spice has also been found to correct the cystic fibrosis defect in
mice, prevent the onset of alcoholic liver disease and may slow down the blood cancer multiple myeloma as well as multiple
Reporting in the 7 December online edition of the Journal of Biological
Chemistry, researchers from the University of California Los Angeles
also revealed that curcumin is more effective in inhibiting formation of
the protein fragments than many other drugs being tested as Alzheimer's treatments.
The researchers found the low molecular weight and polar structure of curcumin allow it to penetrate the blood-brain barrier
effectively and bind to beta amyloid (which form the disease-causing plaques).
In earlier studies published during 2001, the same research team found curcumin has powerful antioxidant and
anti-inflammatory properties, which scientists believe help ease Alzheimer's symptoms caused by oxidation and
The body of research has prompted the UCLA Alzheimer's Disease Research Center (ADRC) to begin human clinical trials
to further evaluate its protective and therapeutic effects.
"The prospect of finding a safe and effective new approach to both
prevention and treatment of Alzheimer's disease is tremendously
exciting," said principal investigator Gregory Cole, professor of
medicine and neurology at the David Geffen School of Medicine at UCLA and associate director of the UCLA Alzheimer's
Disease Research Center.
"Curcumin has been used for thousands of years as a safe
anti-inflammatory in a variety of ailments as part of Indian traditional
medicine," Cole added.
"Recent successful studies in animal models support a growing interest in its possible use for diseases of ageing involving
oxidative damage and inflammation like Alzheimer's, cancer and heart disease. What we really need, however, are clinical
trials to establish safe and
effective doses in aging patients."
Alzheimer's disease is the most common form of dementing illness among middle and older adults, affecting more than 4
million Americans and many millions worldwide. The prevalence of Alzheimer's among adults aged 70-79 in India, however,
is 4.4 times less than the rate in the United States.
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