Gene Target Beats Oil Remedy

Written by Science Knowledge on 1:29 AM

Therapy shows promise in a deadly degenerative brain disease

The 1992 tearjerker Lorenzo’s Oil told the true story of one family’s struggle to save their son from Xlinked adrenoleukodystrophy (ALD), a deadly degenerative brain disease. Unfortunately, over the ensuing years, the oil of the fi lm’s title, a dietary supplement, has not panned out as the cure many people hoped it would be. Now a paper in the November 2009 issue of Science suggests that the longsought cure may come from gene therapy—a famously hyped approach to treatment that tragically caused the death of a teenage experimental subject in 1999. Since then, however, researchers have continued to cautiously pursue gene therapy for certain disorders with known genetic origins. ALD, for instance, is caused by mutations in a gene called ABCD1, leading to unusually high levels of a type of fatty acid that damages the material insulating some neurons. It affects about one in 20,000 sixto eight year old boys, leading to death before adolescence. The main treatment is still bone marrow transplantation: a risky procedure that relies on finding a suitable donor, explains Patrick Aubourg, a neurologist at France’s INSERM research institute. Now Aubourg and his team have showed in a preliminary trial that gene therapy stopped ALD in two boys for whom they could not fi nd matching bone marrow donors. After fi shing stem cells from each individual’s own blood, the researchers inserted a normal version of the ABCD1 gene into some of the cells and transplanted them back into the kids. The results were promising: ALD progression halted within 14 to 16 months. A year later neither child had further brain damage or leukemia (a side effect in some past gene therapy trials). The researchers have now treated a third individual and are preparing for larger trials in Europe and the U.S.

Source of Information : Scientific American Mind March-April 2010

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In its broadest sense, science (from the Latin scientia, meaning "knowledge") refers to any systematic knowledge or practice. In its more usual restricted sense, science refers to a system of acquiring knowledge based on scientific method, as well as to the organized body of knowledge gained through such research.

Fields of science are commonly classified along two major lines: natural sciences, which study natural phenomena (including biological life), and social sciences, which study human behavior and societies. These groupings are empirical sciences, which means the knowledge must be based on observable phenomena and capable of being experimented for its validity by other researchers working under the same conditions.


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