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Updated: Jun 18, 2026

Preparation and Immunostaining of Myelinating Organotypic Cerebellar Slice Cultures
Published on: March 20, 2019
SCAP is required for timely and proper myelin membrane synthesis
Mark H G Verheijen1, Nutabi Camargo, Valerie Verdier
1Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus Amsterdam, VU University, 1081 HV Amsterdam, The Netherlands. mark.verheijen@cncr.vu.nl
Sterol regulatory element-binding protein cleavage activation protein (SCAP) is crucial for myelin lipid synthesis in Schwann cells. Its absence causes hypomyelination, but external lipids offer partial rescue, highlighting SCAP
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Myelination, the process of forming the myelin sheath around nerve fibers, necessitates substantial glial cell membrane synthesis.
- Lipid metabolism plays a critical role in the structural integrity and function of the myelin sheath.
Purpose of the Study:
- To investigate the role of sterol regulatory element-binding protein (SREBP) cleavage activation protein (SCAP) in regulating myelin lipid synthesis.
- To elucidate the impact of SCAP deficiency in Schwann cells on myelination and associated neurological functions.
Main Methods:
- Genetic deletion of SCAP in mouse Schwann cells.
- Analysis of SREBP-mediated gene expression related to cholesterol and fatty acid synthesis.
- Assessment of myelination, gait, and myelin biophysical properties in SCAP mutant mice.
- Investigation of extracellular lipoprotein effects on myelination in SCAP-deficient cells.
Main Results:
- SCAP deletion in Schwann cells abolished SREBP-mediated gene expression for cholesterol and fatty acid synthesis.
- SCAP mutant mice exhibited congenital hypomyelination and abnormal gait.
- Aging SCAP mutant mice showed partial functional recovery and limited myelin production, suggesting SCAP-independent lipid uptake.
- Extracellular lipoproteins partially rescued myelination in SCAP mutant Schwann cells, but myelin thickness and biophysical properties remained abnormal.
Conclusions:
- SCAP-mediated regulation of glial lipogenesis is essential for proper myelin membrane synthesis.
- SCAP deficiency in Schwann cells leads to severe hypomyelination and functional deficits.
- Therapeutic strategies involving external lipid uptake may offer partial compensation for SCAP-related myelin defects.
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