14 de julio de 2008
NUEVA YORK (Reuters Health) - Un grupo de científicos halló
evidencia de que una mutación en el gen llamado CALHM1 influye
en el riesgo de desarrollar enfermedad de Alzheimer, una
condición neurodegenerativa devastadora que afecta a casi 18
millones de personas en todo el mundo.
"El CALHM1 es un nuevo blanco atractivo para los
medicamentos", dijo a Reuters Health Fabien Campagne, del
Colegio de Medicina Weill de la Cornell University, en Nueva
York.
"El diseño de los fármacos que activan el CALHM1 podría
tener un efecto beneficioso en los pacientes que no poseen la
(mutación) polimórfica, así como también en aquellos que portan
el polomorfismo", explicó el autor.
La mutación CALHM1 está relacionada con una forma de
aparición tardía de la enfermedad de Alzheimer. Esta forma de
la condición afecta a las personas de 65 años o más y
representa alrededor del 90 por ciento de los casos de
Alzheimer.
La forma menos común, hereditaria y de aparición temprana
de la enfermedad afecta a las personas de entre 30 y 65 años.
Según los científicos, la mutación CALHM1 parece
interrumpir un canal cerebral de calcio anteriormente
desconocido e incentivar la acumulación de proteína beta
amiloide, que es un componente importante de la placa senil que
bloquea los cerebros de los pacientes con Alzheimer.
Campagne y sus colegas proponen que las "variantes en los
genes CALHM constituirían factores de riesgo importantes de la
enfermedad de Alzheimer de aparición tardía".
FUENTE: Cell, 27 de junio del 2008
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