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Generation of Oligodendrocytes and Oligodendrocyte-Conditioned Medium for Co-Culture Experiments
Published on: February 9, 2020
Galectin-3 drives oligodendrocyte differentiation to control myelin integrity and function
L A Pasquini1, V Millet, H C Hoyos
1Department of Biological Chemistry, IQUIFIB, FFyB, UBA-CONICET, Bs As, Argentina.
Cell Death and Differentiation
|May 14, 2011
Summary
Glial-derived galectin-3 promotes oligodendrocyte differentiation and myelin integrity in the central nervous system (CNS). Loss of galectin-3 impairs myelin structure and function, impacting CNS inflammation recovery.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Galectins regulate central nervous system (CNS) inflammation, but their specific roles in the inflamed CNS are unclear.
- Oligodendrocyte (OLG) differentiation and myelin integrity are critical for CNS function and repair.
Purpose of the Study:
- To investigate the role of galectin-glycan interactions in OLG differentiation, myelin integrity, and function within the CNS.
- To determine the specific contributions of galectin-1 and galectin-3 to these processes.
Main Methods:
- Assessed galectin-1 and -3 expression in astrocytes, microglia, and OLGs.
- Analyzed metalloproteinase activity during OLG differentiation.
- Examined the effects of galectin-3 on OLG differentiation in vitro.
- Utilized galectin-3-deficient (Lgals3(-/-)) and wild-type (WT) mice for in vivo analysis of myelin structure and behavior.
Main Results:
- Galectin-3, but not galectin-1, was upregulated during OLG differentiation and promoted OLG differentiation in a dose- and carbohydrate-dependent manner.
- Conditioned media from galectin-3-expressing microglia promoted OLG differentiation.
- Lgals3(-/-) mice exhibited decreased myelinated axons, reduced myelin turns, altered g-ratio, and looser myelin wrapping compared to WT mice.
- Behavioral analysis showed decreased anxiety in Lgals3(-/-) mice, potentially linked to demyelination.
Conclusions:
- Glial-derived galectin-3 plays a crucial role in promoting OLG differentiation, contributing to myelin integrity and function.
- Galectin-3 deficiency impairs myelin structure and function, with implications for inflammatory demyelinating disorders and CNS recovery.
- Targeting galectin-3 may offer therapeutic potential for CNS inflammatory and demyelinating conditions.
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