1. Erythrocyte membrane fluidity in mild cognitive impairment and Alzheimer's disease patients
- Author
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Tiziana Bacchetti, Arianna Vignini, Laura Mazzanti, Alessia Giulietti, Sofia Pugnaloni, Sonila Alia, Rosamaria Fiorini, and Simona Luzzi
- Subjects
Male ,0301 basic medicine ,Aging ,medicine.medical_specialty ,Membrane Fluidity ,medicine.disease_cause ,Biochemistry ,Antioxidants ,Fluorescence ,Lipid peroxidation ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Endocrinology ,Alzheimer Disease ,Internal medicine ,Genetics ,medicine ,Humans ,Dementia ,Cognitive Dysfunction ,Molecular Biology ,Aged ,Aged, 80 and over ,chemistry.chemical_classification ,Reactive oxygen species ,business.industry ,Erythrocyte Membrane ,Oxygen transport ,Cell Biology ,Oxygenation ,medicine.disease ,Acetylcholinesterase ,Oxidative Stress ,030104 developmental biology ,chemistry ,Female ,Laurdan ,business ,030217 neurology & neurosurgery ,Oxidative stress - Abstract
Alzheimer's disease (AD) is the most common cause of dementia accounting for 60-70% of all demented cases and one of the leading sources of morbidity and mortality in the aging population. Most of the recent literature regards the relationship between plasma oxidative stress and AD, showing that markers of lipid peroxidation are significantly higher in AD and Mild Cognitive Impairment (MCI) patients with respect to control subjects. The increased generation of reactive oxygen species that occurs in AD may be also responsible for oxidative injury to erythrocyte membranes. Since erythrocyte membrane serves as a variable barrier to oxygen transport, changes in its stability can induce cellular hypoxia and the consequence brain tissue oxygenation. In this study, plasma oxygen radical absorbance capacity (ORAC) and erythrocyte membrane fluidity have been evaluated in control, MCI and AD patients. Moreover erythrocyte membrane acetylcholinesterase (AchE) activity has been measured in control and AD patients. Plasma ORAC significantly decreased in MCI and AD subjects with respect to the controls, while a decrease in erythrocyte membrane fluidity has been observed only in MCI patients. No significant differences were detected in erythrocyte AchE activity between control subjects and AD patients.
- Published
- 2019