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C elegans: a model for exploring the genetics of fat storage
Renée M McKay1, James P McKay, Leon Avery
1Center for Developmental Biology, University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, Dallas, TX 75390, USA.
Developmental Cell
|January 18, 2003
Summary
C. elegans reveals key genes controlling fat storage. Disrupting transcription factors SREBP and C/EBP, or mitochondrial function, significantly reduces fat accumulation, highlighting conserved mechanisms in fat biology.
Area of Science:
- Genetics
- Molecular Biology
- Developmental Biology
Background:
- Understanding the genetic regulation of fat biology is crucial for metabolic health.
- Mammalian fat formation involves key transcription factors like SREBP and C/EBP.
Purpose of the Study:
- To investigate the genetic control of fat biology using C. elegans as a model organism.
- To identify novel genes involved in lipid storage and fat accumulation.
Main Methods:
- Generated C. elegans mutants lacking SREBP and C/EBP transcription factors.
- Performed a reverse genetic screen to identify genes affecting lipid storage.
- Inhibited mitochondrial respiratory chain (MRC) function chemically in worms and mammalian adipocytes.
Main Results:
- Worms lacking SREBP or C/EBP exhibited a lipid-depleted phenotype with reduced fat stores.
- The reverse genetic screen identified additional genes involved in worm lipid storage.
- Inhibition of MRC function markedly reduced fat accumulation in both C. elegans and mammalian adipocytes.
- A gene encoding lpd-3, a homolog of which is required for mammalian fat storage, was identified.
Conclusions:
- C. elegans serves as a genetically tractable model for studying fat biology.
- Conserved mechanisms, including the role of mitochondrial function and specific genes like lpd-3, are critical for fat storage across species.