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Link between brain insulin resistance, neuronal stress in worsening Alzheimer's disease
Date:6/26/2012

problems that cause the brain to produce toxins."

Ultimately, these findings will help to expand ways to both detect and treat AD.

Growing evidence supports the concept that AD is fundamentally a metabolic syndrome that leads to abnormalities linked to brain insulin and insulin-like growth factor (IGF) resistance. In AD, brain insulin and IGF resistance and deficiencies begin early and worsen with severity of the disease. The rationale behind the progression of the disease is that insulin-resistance dysregulates lipid metabolism and promotes ceramide accumulation, thereby increasing inflammation and lipid metabolism, causing toxic ceramides to accumulate in the brain. The end result is increased stress that threatens the survival and function of neurons in the brain.

The present study was designed to gain a better understanding of how brain insulin resistance becomes progressive and contributes to the neurodegeneration in AD, focusing on the roles of ceramides and stress. The researchers studied the same brain samples used previously to demonstrate progressive impairments in brain insulin/IGF signaling with increasing severity of AD.


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Contact: Ellen Slingsby
eslingsby@lifespan.org
401-444-6421
Lifespan
Source:Eurekalert

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