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A Human 3D Extracellular Matrix-Adipocyte Culture Model for Studying Matrix-Cell Metabolic Crosstalk
Published on: November 7, 2019
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Lactosylceramide induced by elastin-derived peptides decreases adipocyte differentiation
Thinhinane Hocine1, Sebastien Blaise1, Cathy Hachet1
1UMR CNRS 7369 MEDyC, SFR CAP-Sante, Université de Reims Champagne-Ardenne, Reims, France.
Journal of Physiology and Biochemistry
|June 28, 2020
Summary
Elastin-derived peptides (EDPs) activate the elastin receptor complex (ERC), reducing adipocyte differentiation via the lactosylceramide (Lac-Cer) and ERK1-2 (p-ERK1-2) pathway. This pathway is a potential target for obesity and insulin resistance.
Area of Science:
- Biochemistry
- Cell Biology
- Extracellular Matrix Biology
Background:
- Elastin is a key extracellular matrix protein in cardiovascular tissues, regulating cell signaling.
- Elastin degradation and elastin-derived peptides (EDPs) are implicated in cardiovascular and metabolic diseases.
- Compromised elastin function affects tissue integrity and cellular processes.
Purpose of the Study:
- To investigate the effects of EDPs on 3T3 preadipocyte cell differentiation.
- To identify the signaling pathway mediating EDP-induced inhibition of adipogenesis.
- To explore potential therapeutic targets for obesity and insulin resistance.
Main Methods:
- 3T3-L1 cells treated with EDPs.
- Oil red O staining for lipid droplet accumulation.
- Real-time RT-PCR for gene expression analysis.
- Flow cytometry and immunocytochemistry to identify signaling pathways.
Main Results:
- EDPs activate the elastin receptor complex (ERC), decreasing adipocyte differentiation.
- EDP/ERC activation leads to lactosylceramide (Lac-Cer) production.
- Lac-Cer promotes ERK1-2 phosphorylation (p-ERK1-2), inhibiting PPARγ and adipogenesis.
Conclusions:
- The EDP/Lac-Cer/p-ERK1-2 signaling pathway inhibits adipocyte differentiation.
- This pathway is a potential therapeutic target for obesity and insulin resistance.
- Understanding this pathway offers insights into metabolic disease progression.
