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Characterization and Isolation of Mouse Primary Microglia by Density Gradient Centrifugation
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Effects of statins on microglia.
Catharina Lindberg1, Milita Crisby, Bengt Winblad
1Karolinska Institutet, Neurotec Department, Division of Experimental Geriatrics, Karolinska University Hospital, Huddinge, Stockholm, Sweden. catharina.lindberg@neurotec.ki.se
Journal of Neuroscience Research
|August 25, 2005
Summary
Statins like atorvastatin and simvastatin affect microglia, the brain's immune cells. While they reduce some inflammation, they can worsen cell damage caused by Alzheimer's disease factors.
Area of Science:
- Neuroscience
- Pharmacology
- Immunology
Background:
- High cholesterol is an Alzheimer's disease (AD) risk factor.
- Statins, used to lower cholesterol, may protect against AD.
- Neuroinflammation, involving microglia and cytokines like IL-6, is prominent in AD.
Purpose of the Study:
- To investigate the effects of atorvastatin and simvastatin on microglial cells.
- To assess impacts on interleukin-6 (IL-6) secretion and cell viability.
- To examine responses to bacterial lipopolysaccharides (LPS) and beta-amyloid (Abeta1-40).
Main Methods:
- Used human microglial cell line (CHME-3) and primary rat microglia.
- Activated cells with LPS or Abeta1-40, with and without statins.
- Measured IL-6 secretion and cell viability.
Main Results:
- LPS and Abeta1-40 induced IL-6 secretion; Abeta1-40 reduced viability.
- Both statins decreased basal IL-6 and microglial viability.
- Atorvastatin, but not simvastatin, reduced LPS- and Abeta1-40-induced IL-6.
- Both statins potentiated Abeta1-40-induced reduction in cell viability.
Conclusions:
- Microglial responses to statins are crucial for evaluating their role in AD.
- Statins may have complex effects on neuroinflammation and cell survival in AD.
- Further consideration of microglial-mediated effects is needed for statin use in neurodegenerative disorders.
