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Updated: Jun 3, 2025
08:34
Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
Published on: June 3, 2016
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JMJD8 Regulates Adipocyte Hypertrophy Through the Interaction With Perilipin 2.
1Nutritional Sciences and Toxicology Department, University of California, Berkeley, Berkeley, CA.
Diabetes
|January 9, 2025
Summary
New research reveals that JMJD8 and PLIN2 interact to promote adipocyte hypertrophy and insulin resistance. This interaction suppresses lipophagy, impacting energy production and fat mobilization during fasting.
Area of Science:
- Metabolism
- Cell Biology
- Endocrinology
Background:
- Previous studies indicate Jumonji domain-containing protein 8 (JMJD8) mediates insulin resistance through adipocyte hypertrophy.
- Adipocyte lipid metabolism and energy homeostasis are critical in metabolic health.
Purpose of the Study:
- To identify novel binding partners of JMJD8.
- To elucidate the functional role of JMJD8-PLIN2 interaction in adipocyte biology and insulin resistance.
Main Methods:
- Proteomics approaches were used to identify JMJD8 binding partners.
- Co-immunoprecipitation assays confirmed the physical interaction between JMJD8 and PLIN2.
- Cellular assays assessed the impact of JMJD8-PLIN2 interaction on lipophagy, phosphorylation, and energy production.
Main Results:
- Perilipin 2 (PLIN2) was identified as a novel binding partner of JMJD8.
- JMJD8 physically interacts with PLIN2, promoting adipocyte hypertrophy and insulin resistance.
- JMJD8 inhibits PLIN2 phosphorylation, suppressing fasting-induced lipophagy and reducing cellular energy production.
Conclusions:
- The JMJD8-PLIN2 interaction is a key driver of adipocyte hypertrophy and insulin resistance.
- JMJD8 regulates lipid droplet homeostasis by modulating PLIN2 phosphorylation and lipophagy.
- Targeting the JMJD8-PLIN2 pathway may offer a therapeutic strategy for metabolic disorders.
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