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06:59
Quantification of Atherosclerosis in Mice
Published on: June 12, 2019
X-linked adrenoleukodystrophy mice demonstrate abnormalities in cholesterol metabolism
Isabelle Weinhofer1, Sonja Forss-Petter, Markus Kunze
1Center for Brain Research, Medical University Vienna, Austria. isabelle.weinhofer@meduniwien.ac.at
FEBS Letters
|October 11, 2005
Summary
Cholesterol impacts very long-chain fatty acids (VLCFAs) in X-linked adrenoleukodystrophy (X-ALD). However, cholesterol-lowering treatments show species-specific effects, complicating drug development for this neurodegenerative disorder.
Area of Science:
- Biochemistry
- Genetics
- Neurodegenerative Disorders
Background:
- X-linked adrenoleukodystrophy (X-ALD) is a neurodegenerative disorder caused by ABCD1 mutations.
- X-ALD is characterized by the accumulation of very long-chain fatty acids (VLCFAs).
- Previous studies indicated cholesterol-lowering normalized VLCFAs in X-ALD patient cells and plasma.
Purpose of the Study:
- To investigate the relationship between cholesterol metabolism and ABCD1 function in X-ALD.
- To evaluate the efficacy of cholesterol modulation on VLCFA levels in X-ALD models.
- To explore potential species differences in response to cholesterol modulation for X-ALD.
Main Methods:
- Studied cholesterol loading effects on ABCD1 expression in cultured cells.
- Analyzed plasma cholesterol, hepatic HMG-CoA reductase, and Abcd2 expression in X-ALD mice.
- Assessed brain VLCFA levels in response to cholesterol modulation in X-ALD and control mice.
- Examined cholesterol-lowering effects on VLCFA in murine X-ALD fibroblasts.
Main Results:
- Cholesterol loading induced ABCD1 expression in cultured cells.
- X-ALD mice exhibited elevated plasma cholesterol with downregulated hepatic HMG-CoA reductase and Abcd2.
- Cholesterol modulation led to increased brain VLCFA in X-ALD mice but decreased levels in controls.
- Cholesterol-lowering failed to normalize VLCFA in murine X-ALD fibroblasts.
Conclusions:
- VLCFA accumulation in X-ALD is linked to cholesterol metabolism.
- Species differences exist in the response to cholesterol modulation, complicating therapeutic strategies.
- Cholesterol-lowering drugs may have complex and varied effects in X-ALD treatment.
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