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Published on: November 10, 2017
Effects of Plasma Lipids and Statins on Cognitive Function
Rui Li1, Tian-Jun Wang2, Pei-Yuan Lyu3
1Graduate School, Hebei Medical University, Shijiazhuang, Hebei 050017, China.
Insights
The link between plasma lipids and cognitive function remains unclear, with ongoing research into potential mechanisms. While statins are widely used, their long-term effects on cognition and dementia are not definitively established, though rare adverse effects are a concern.
Area of Science:
- Neurology and Gerontology
- Cardiovascular Medicine
- Pharmacology
Background:
- Dementia is a leading cause of death in developed nations, necessitating research into cognitive function and vascular risk factors.
- The complex and controversial relationship between plasma lipids and cognitive function requires further investigation.
- Increasing life expectancy highlights the need for therapies to prevent and treat cognitive impairment and dementia.
Purpose of the Study:
- To review the existing literature on the effects of plasma lipids on cognitive function.
- To analyze the impact of statin use on cognitive function and dementia.
- To explore the underlying mechanisms linking plasma lipids, statins, and cognition.
Main Methods:
- A comprehensive search of the PubMed database was conducted.
- Keywords included "plasma lipids," "hyperlipidemia," "hypercholesterolemia," "statins," and "cognition function."
- Retrieved articles were reviewed to analyze effects and mechanisms.
Main Results:
- The relationship between plasma lipids and cognitive function is not definitively established.
- Potential mechanisms include blood-brain barrier injury, effects on cerebral microvasculature, amyloid deposition, and neuroprotection.
- Most statin-cognition studies are observational; randomized controlled trials are limited, leaving long-term effects elusive. Rare adverse cognitive effects of statins are noted in susceptible individuals.
Conclusions:
- The association between plasma lipids, statins, and cognitive function is complex and not fully understood.
- Further research into the mechanisms is crucial for understanding cognitive impairment and dementia.
- Identifying these mechanisms may inspire novel therapeutic and preventive strategies for cognitive disorders.
Objective::
Dementia is the fourth most common cause of death in developed countries. The relationship between plasma lipids and cognitive function is complex and controversial. Due to the increasing life expectancy of the population, there is an urgent need to control vascular risk factors and to identify therapies to prevent and treat both cognitive impairment and dementia. Here, we reviewed the effects of plasma lipids and statins on cognitive function.
Data Sources::
We searched the PubMed database for research articles published through November 2017 with key words including "plasma lipids," "hyperlipidemia," "hypercholesterolemia," "statins," and "cognition function."
Study Selection::
Articles were retrieved and reviewed to analyze the effects of plasma lipids and statins on cognitive function and the mechanisms underlying these effects.
Results::
Many studies have examined the relationship between plasma lipids and cognitive function, but no definitive conclusions can be drawn. The mechanisms involved may include blood-brain barrier injury, the influence on small blood vessels in the brain, the influence on amyloid deposition, and a neuroprotective effect. To date, most studies of statins and cognition have been observational, with few randomized controlled trials. Therefore, firm conclusions regarding whether mid- or long-term statin use affects cognition function and dementia remain elusive. However, increasing concern exists that statins may be a causative factor for cognitive problems. These adverse effects appear to be rare and likely represent a yet-to-be-defined vulnerability in susceptible individuals.
Conclusions::
The association between plasma lipids and cognition, the mechanism of the influence of plasma lipids on cognitive function, and the association between statins and cognitive function are complex issues and currently not fully understood. Future research aimed at identifying the mechanisms that underlie the effects of plasma lipids and statins on cognition will not only provide important insight into the causes and interdependencies of cognitive impairment and dementia, but also inspire novel strategies for treating and preventing these cognitive disorders.
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