Energy Dysregulation in Huntington's Disease - Ju, Tz-Chuen
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Adenosine monophosphate-activated protein kinase (AMPK) is a major energy sensor that maintains cellular energy homeostasis. Huntington's disease (HD) is a neurodegenerative disorder caused by the expansion of CAG repeats in the huntingtin (Htt) gene. Herein, we report that activation of the ¿1 isoform of AMPK (AMPK-¿1) occurred in striatal neurons of humans and mice with HD. Overactivation of AMPK in the striatum caused brain atrophy, facilitated neuronal loss, and increased formation of Htt aggregates in a transgenic mouse model (R6/2) of HD. Moreover, mHtt induced oxidative stress which…mehr

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Produktbeschreibung
Adenosine monophosphate-activated protein kinase (AMPK) is a major energy sensor that maintains cellular energy homeostasis. Huntington's disease (HD) is a neurodegenerative disorder caused by the expansion of CAG repeats in the huntingtin (Htt) gene. Herein, we report that activation of the ¿1 isoform of AMPK (AMPK-¿1) occurred in striatal neurons of humans and mice with HD. Overactivation of AMPK in the striatum caused brain atrophy, facilitated neuronal loss, and increased formation of Htt aggregates in a transgenic mouse model (R6/2) of HD. Moreover, mHtt induced oxidative stress which caused activation of the a isoform of AMPK, and subsequent neurodegeneration. Oxidative stress played a critical role in the activation of AMPK revealed by the fact that the level of oxidative stress was higher in striatal cells expressing mutant Htt, and that a blocker of oxidative stress suppressed the activation of AMPK. Collectively, activation of AMPK-¿1 played a pivotal role in the potentiation of neurodegeneration.
Autorenporträt
I am an Assistant Professor in Taiwan, teaching Physiology, Physiological experiments and Anatomy courses. I have accumulated many years of learning and valuable research experiences in areas such as life science and neuroscience.