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Evidence for Brain Glucose Dysregulation
in Alzheimer's disease
Alzheimers Dement. 2017 (Oct 19) [Epub] ~ FULL TEXT
To the best of our knowledge, this report is the first to measure brain tissue glucose concentrations and assess glycolytic flux to demonstrate their relationships with both severity of AD pathology and the expression of AD symptoms. Including brain tissue samples from “asymptomatic Alzheimer’s disease (ASYMAD)” individuals who represent an intermediate group in the gradation of neuropathology from controls to AD patients in the absence of cognitive impairment during life allowed us to relate measures of brain glucose concentration and glycolytic flux to incremental levels of AD pathology and symptom expression. Equally importantly, by measuring glucose concentrations in brain regions both vulnerable to distinct pathological features of AD, that is, MFG (amyloid deposition) and ITG (tau accumulation) as well as in a region relatively resistant to AD pathology, that is, cerebellum [34], we were able to determine whether the observed alterations in brain glucose concentrations and abnormalities in glycolysis were related to defining pathological processes.
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The Role of Reactive Oxygen Species in the
Pathogenesis of Alzheimer's Disease,
Parkinson's Disease, and Huntington's
Disease: A Mini Review
Oxid Med Cell Longev 2016 (Dec 27); 2016: 8590578 ~ FULL TEXT
Neurodegenerative diseases affect not only the life quality of aging populations, but also their life spans. All forms of neurodegenerative diseases have a massive impact on the elderly. The major threat of these brain diseases includes progressive loss of memory, Alzheimer's disease (AD), impairments in the movement, Parkinson's disease (PD), and the inability to walk, talk, and think, Huntington's disease (HD). Oxidative stress and mitochondrial dysfunction are highlighted as a central feature of brain degenerative diseases. Oxidative stress, a condition that occurs due to imbalance in oxidant and antioxidant status, has been known to play a vital role in the pathophysiology of neurodegenerative diseases including AD, PD, and HD. A large number of studies have utilized oxidative stress biomarkers to investigate the severity of these neurodegenerative diseases and medications are available, but these only treat the symptoms. In traditional medicine, a large number of medicinal plants have been used to treat the symptoms of these neurodegenerative diseases. Extensive studies scientifically validated the beneficial effect of natural products against neurodegenerative diseases using suitable animal models. This short review focuses the role of oxidative stress in the pathogenesis of AD, PD, and HD and the protective efficacy of natural products against these diseases.
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Nutraceuticals and Their Preventive or Potential
Therapeutic Value in Parkinson's Disease
Nutrition Reviews 2012 (Jul); 70 (7): 373–386 ~ FULL TEXT
Parkinson's disease (PD) is the second most common aging-related disorder in the world, after Alzheimer's disease. It is characterized by the progressive loss of dopaminergic neurons in the substantia nigra pars compacta and other parts of the brain, leading to motor impairment, cognitive impairment, and dementia. Current treatment methods, such as L-dopa therapy, are focused only on relieving symptoms and delaying progression of the disease. To date, there is no known cure for PD, making prevention of PD as important as ever. More than a decade of research has revealed a number of major risk factors, including oxidative stress and mitochondrial dysfunction. Moreover, numerous nutraceuticals have been found to target and attenuate these risk factors, thereby preventing or delaying the progression of PD. These nutraceuticals include vitamins C, D, E, coenzyme Q10, creatine, unsaturated fatty acids, sulfur-containing compounds, polyphenols, stilbenes, and phytoestrogens.
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