scholarly journals Alzheimer Disease and Metabolism: Role of Cholesterol and Membrane Fluidity

10.5772/54091 ◽  
2013 ◽  
Author(s):  
Genaro G. ◽  
Fermin P. ◽  
Luis J. ◽  
Miguel A. ◽  
Irma E. ◽  
...  
Keyword(s):  
Alzheimer Disease ◽  
Membrane Fluidity

scholarly journals The Microbiota–Gut–Brain Axis and Alzheimer Disease. From Dysbiosis to Neurodegeneration: Focus on the Central Nervous System Glial Cells

2021 ◽  
Vol 10 (11) ◽  
pp. 2358
Author(s):  
Maria Grazia Giovannini ◽  
Daniele Lana ◽  
Chiara Traini ◽  
Maria Giuliana Vannucchi
Keyword(s):  
Alzheimer Disease ◽  
Glial Cells ◽  
Cell Types ◽  
The Past ◽  
The Central Nervous System ◽  
Diseased State ◽  
The Brain ◽  
Alzheimer Disease Pathogenesis ◽  
Brain Homeostasis

The microbiota–gut system can be thought of as a single unit that interacts with the brain via the “two-way” microbiota–gut–brain axis. Through this axis, a constant interplay mediated by the several products originating from the microbiota guarantees the physiological development and shaping of the gut and the brain. In the present review will be described the modalities through which the microbiota and gut control each other, and the main microbiota products conditioning both local and brain homeostasis. Much evidence has accumulated over the past decade in favor of a significant association between dysbiosis, neuroinflammation and neurodegeneration. Presently, the pathogenetic mechanisms triggered by molecules produced by the altered microbiota, also responsible for the onset and evolution of Alzheimer disease, will be described. Our attention will be focused on the role of astrocytes and microglia. Numerous studies have progressively demonstrated how these glial cells are important to ensure an adequate environment for neuronal activity in healthy conditions. Furthermore, it is becoming evident how both cell types can mediate the onset of neuroinflammation and lead to neurodegeneration when subjected to pathological stimuli. Based on this information, the role of the major microbiota products in shifting the activation profiles of astrocytes and microglia from a healthy to a diseased state will be discussed, focusing on Alzheimer disease pathogenesis.

Dietary Selenium or Zinc Supplementation Restores Brain Lipid Composition and Membrane Fluidity in Protein-Undernourished Rats

2016 ◽  
Vol 38 (6) ◽  
pp. 397-406
Author(s):  
Olusegun L. Adebayo ◽  
Bamidele A. Salau ◽  
Rajat Sandhir ◽  
Gbenga A. Adenuga
Keyword(s):  
Membrane Fluidity ◽  
Lipid Composition ◽  
Zinc Supplementation ◽  
Protective Role ◽  
Membrane Lipid ◽  
Limited Information ◽  
Total Lipids ◽  
Major Focus ◽  
Membrane Lipid Composition

Studies have shown that protein undernutrition (PU) modifies the membrane lipid composition in the intestine and liver, as well as in plasma and other areas. However, there is limited information on the effect of PU on synaptosomal membrane lipid composition and fluidity and the protective role of selenium (Se) and zinc (Zn), which is a major focus of the present study. For 10 weeks, rats were fed diets containing 16% casein, which constituted the adequate protein diet, or 5% casein, representing the PU diet. The animals were supplemented with Se and Zn at a concentration of 0.15 and 227 mg L-1, respectively, in drinking water for 3 weeks. The results showed a significant increase in total lipids, glycolipids, triglycerides, cholesterol, and the cholesterol/phospholipid (Chol/PL) ratio, and a significant reduction in phospholipids and membrane fluidity. Se and Zn supplementation to PU rats, however, significantly lowered total lipids, glycolipids, triglycerides, cholesterol, and the Chol/PL ratio, while phospholipids and membrane fluidity were significantly restored. It is concluded that a perturbed lipid composition induced by PU affects the membrane structure and fluidity, which in turn influences membrane functions. The study suggests that Se and Zn supplementation might be beneficial in restoring the lipid dyshomeostasis associated with PU.

scholarly journals The Role of Caspase Cleavage of Tau in Alzheimer Disease Neuropathology

2005 ◽  
Vol 64 (2) ◽  
pp. 104-112 ◽  
Author(s):  
Carl W. Cotman ◽  
Wayne W. Poon ◽  
Robert A. Rissman ◽  
Mathew Blurton-Jones
Keyword(s):  
Alzheimer Disease ◽  
Caspase Cleavage

scholarly journals Role of Curcumin in Treatment of Alzheimer Disease

2017 ◽  
Vol 04 (03) ◽  
Author(s):  
Chitrangada Das Mukhopadhyay ◽  
Bhuban Ruidas ◽  
Sutapa Som Chaudhury
Keyword(s):  
Alzheimer Disease

scholarly journals Assistive Technology and Cognitive-Behavioral Programs for Promoting Adaptive Skills of Persons with Alzheimer Disease: A Selective Review

2018 ◽  
Vol 2 (3) ◽  
pp. 14-29
Author(s):  
Viviana Perilli ◽  
Fabrizio Stasolla ◽  
Stefania Maselli ◽  
Isabel Morelli
Keyword(s):  
Quality Of Life ◽  
Alzheimer Disease ◽  
Assistive Technology ◽  
Challenging Behavior ◽  
Behavioral Interventions ◽  
Challenging Behaviors ◽  
Cognitive Behavioral ◽  
Adaptive Responding

Background: Person with Alzheimer Disease may present cognitive, social, communication, physical, and orientation impairments. Furthermore, individuals with Alzheimer Disease may exhibit challenging behavior, isolation, and passivity. Objectives: To emphasize the role of Assistive Technology-based interventions and Cognitive-Behavioral Programs to improve the independence, and the quality of life of patients with Alzheimer Disease. To assess the effects on teaching adaptive responding, and decreasing challenging behaviors. Method: A selective literature review was carried out considering Alzheimer, Assistive Technology, Cognitive-Behavioral Programs, Adaptive Responding, Challenging Behaviors, and Quality of life as keywords. Twenty-six studies were reviewed. Results: Empirical data demonstrated the effectiveness, and the suitability of the selected interventions, although few failures occurred. The participants involved significantly increased their adaptive responding during the intervention phases, and maintained their performance over the time. Conclusion: Assistive Technology-based rehabilitative programs and Cognitive-Behavioral Interventions may be helpful for promoting the independence and the quality of life of individuals with Alzheimer Disease.

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