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Tracing the Series of Steps That Lead to Neuronal Cell Death

by Dr. Trupti Shirole on December 2, 2015 at 7:31 AM
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 Tracing the Series of Steps That Lead to Neuronal Cell Death

Astrocytes are star-shaped cells found in the brain and spinal cord. Damage to astrocyctes is found in many neurodegenerative conditions such as Alexander disease. However, the exact role of astrocyte dysfunction in the development of these disease still remains unclear. A fruit fly model of a rare, neurodegenerative disease is helping researchers at Brigham and Women's Hospital (BWH) trace the series of steps that lead to neuronal cell death.

Researchers have developed a genetic model that is yielding new insights into what happens when astrocytes go awry. The research team developed a fruit fly model of Alexander disease, a neurodegenerative disease that primarily affects astrocytes, and was able to narrow in on the molecular signals leading to neuronal cell death, identifying nitric oxide (NO) as a critical mediator.

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The team verified their results in a mouse model and also found evidence of activation of the same pathway in samples from patients with Alexander disease.

Corresponding author Mel B. Feany, a senior pathologist in the BWH Department of Pathology, said, "We're excited to be contributing to a growing area of study of how astrocytes contribute to neurodegeneration, and to have uncovered a role for NO as a neuronal cell death signaling molecule. Our findings define a potential mechanism for neuronal cell death in Alexander disease and possibly other neurodegenerative diseases with astrocyte dysfunction."

Source: Eurekalert
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