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Microparticles are related to cognitive and functional status from normal aging to dementia
Carolina A Magalhães1, Fernanda M Campos1, Cristina M G Loures1
1Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
Abstract:
Recently, we have shown that microparticles (MPs) levels derived from leukocytes (LMPs), endothelium (EMPs), neurons (NMPs) and those expressing tissue factor (TFMPs) were higher in Alzheimer's Disease (AD) patients when compared to cognitively healthy subjects. Therefore, in this study we proposed to investigate the correlation between MPs levels, cognitive performance and functional status in a sample of elderly individuals. We evaluated MPs derived from platelets (PMPs), LMPs, EMPs, NMPs and TFMPs in 43 participants, of whom 12 with probable dementia due to AD, 16 with mild cognitive impairment (MCI) and 15 with no objective cognitive or functional impairment. PMPs, LMPs and TFMPs, were associated with cognitive impairment in this population. LMPs and NMP, were associated to lower functional performance in the elderly sample. These results suggest that MPs may be involved in the pathophysiology of neurodegenerative disorders.
Insights
Microparticle (MP) levels, including platelet-derived MPs (PMPs), leukocyte-derived MPs (LMPs), and tissue factor-expressing MPs (TFMPs), correlate with cognitive impairment. Certain MPs also indicate reduced functional performance in the elderly.
Area of Science:
- Neuroscience
- Biochemistry
- Gerontology
Background:
- Microparticles (MPs) are cell-derived vesicles implicated in intercellular communication.
- Elevated levels of specific MPs (leukocyte-derived MPs [LMPs], endothelium-derived MPs [EMPs], neuron-derived MPs [NMPs], and tissue factor-expressing MPs [TFMPs]) have been observed in Alzheimer's Disease (AD) patients.
- The relationship between various MP types and cognitive/functional status in the elderly requires further investigation.
Purpose of the Study:
- To investigate the correlation between different types of microparticles (MPs) and cognitive performance.
- To examine the association between MPs levels and functional status in elderly individuals.
- To explore the potential role of MPs in the pathophysiology of neurodegenerative disorders.
Main Methods:
- Quantification of MPs derived from platelets (PMPs), leukocytes (LMPs), endothelium (EMPs), neurons (NMPs), and tissue factor (TFMPs).
- Evaluation of 43 participants, categorized into probable dementia due to AD, mild cognitive impairment (MCI), and cognitively healthy groups.
- Correlation analysis between MP levels and standardized cognitive and functional assessments.
Main Results:
- Platelet-derived MPs (PMPs), leukocyte-derived MPs (LMPs), and tissue factor-expressing MPs (TFMPs) were significantly associated with cognitive impairment.
- Leukocyte-derived MPs (LMPs) and neuron-derived MPs (NMPs) were linked to lower functional performance in the elderly sample.
- Specific MP types show differential associations with cognitive and functional decline.
Conclusions:
- MPs, particularly PMPs, LMPs, and TFMPs, are associated with cognitive impairment in the elderly.
- LMPs and NMPs may play a role in reduced functional capacity in aging populations.
- These findings suggest that MPs are potentially involved in the underlying mechanisms of neurodegenerative diseases.
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