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Assessment of Mitochondrial Functions and Cell Viability in Renal Cells Overexpressing Protein Kinase C Isozymes
15:43

Assessment of Mitochondrial Functions and Cell Viability in Renal Cells Overexpressing Protein Kinase C Isozymes

Published on: January 7, 2013

Protein kinase C deficiency increases fatty acid oxidation and reduces fat storage

Rishipal R Bansode1, Wei Huang1, Sanjit K Roy1

  • 1Department of Molecular and Cellular Biochemistry, Columbus, Ohio 43210.

The Journal of Biological Chemistry
|October 27, 2007
PubMed

Insights

Protein kinase Cbeta (PKCbeta) deficiency leads to leaner mice with reduced fat. This suggests PKCbeta plays a key role in regulating body triglyceride content and offers potential therapeutic targets for obesity.

Area of Science:

  • Biochemistry
  • Physiology
  • Metabolic Research

Background:

  • Metabolic syndrome is prevalent, yet mechanisms controlling body triglyceride (TG) levels are not fully understood.
  • Protein kinase Cbeta (PKCbeta) is implicated in cellular signaling, but its role in whole-body TG homeostasis is unclear.

Purpose of the Study:

  • To investigate the function of protein kinase Cbeta (PKCbeta) in regulating triglyceride homeostasis.
  • To determine the physiological consequences of PKCbeta deficiency on body composition and energy metabolism.

Main Methods:

  • Utilized PKCbeta knockout (PKCbeta(-/-)) mice and compared them to wild-type littermates.
  • Assessed body weight, fat depot size, TG content in liver and muscle, food intake, and energy expenditure.

Main Results:

  • PKCbeta(-/-) mice were significantly leaner with reduced white adipose tissue mass and lower TG levels in liver and skeletal muscle.
  • Mutant mice exhibited hyperphagia but displayed reduced feed efficiency, indicating increased energy expenditure.
  • Protection from obesity was linked to elevated oxygen consumption, enhanced fatty acid oxidation, increased mitochondrial biogenesis, PGC-1alpha and UCP-2 upregulation, and perilipin downregulation in adipocytes.

Conclusions:

  • PKCbeta plays a critical role in maintaining triglyceride homeostasis and regulating body fat accumulation.
  • PKCbeta deficiency enhances fat metabolism in adipocytes, suggesting potential therapeutic avenues for obesity and related metabolic disorders.

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