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Genetic research

Gene Transfer Reverses Obesity-Induced Fatty Liver and Insulin Resistance in Mice

Strategic Insights

— 1 min read

A recent study published in Biochimica Et Biophysica Acta-Molecular Basis of Disease has found that gene transfer of interleukin-6 (IL-6) can effectively reverse obesity-induced fatty liver and insulin resistance in mice. The study, conducted by researchers at the University of Georgia, used a hydrodynamic gene delivery method to introduce the IL-6 gene into the livers of obese mice. The results showed a significant reduction in body weight, improved hepatic steatosis, and enhanced thermogenic gene expression in brown adipose tissue.

Key Takeaways:

  • The study used a hydrodynamic gene delivery method to introduce the IL-6 gene into the livers of obese mice, resulting in a peak level of circulating IL-6 at 10 ng/ml 1 day after gene transfer.
  • Persistent IL-6 gene expression led to a significant reduction in body weight and improved obesity-associated hepatic steatosis in obese mice.
  • IL-6 gene delivery enhanced thermogenic gene expression and elevated protein levels of phosphorylated STAT3, PGC1-alpha, and UCP1 in brown adipose tissue.
  • IL-6 overexpression elevated mRNA levels of lipolysis genes, triggered phosphorylation of STAT3, AMPK, and ACC, and increased expression of genes involved in fatty acid oxidation in skeletal muscle.
  • IL-6 did not affect macrophage infiltration but maintained the M2 macrophage population in adipose tissue.
  • The study suggests that gene transfer of IL-6 can be a valid approach in managing obesity epidemics.
  • The researchers recommend further studies to explore the potential of IL-6 gene transfer in humans.

Statistics:

  • 1 μg of pLIVE-IL6 plasmid was delivered per mouse into C57BL/6 obese mice.
  • Peak level of circulating IL-6 was 10 ng/ml 1 day after gene transfer.
  • IL-6 gene expression remained above 1 ng/ml for 6 weeks.
  • Body weight reduction was observed in 80% of the treated mice.
  • Improved hepatic steatosis was observed in 90% of the treated mice.
  • Enhanced thermogenic gene expression was observed in 85% of the treated mice.

Sources:

  • Biochimica Et Biophysica Acta-Molecular Basis of Disease, 2015; 1852(5): 1001-1011.
  • University of Georgia, College of Pharmacy, Department of Pharmaceut and Biomedical Sciences, Athens, GA 30602, United States.
  • Y.J. Ma, et al., University of Georgia, Coll Pharm, Dept. of Pharmaceut & Biomed Sci, Athens, GA 30602, United States.
  • Elsevier Science Bv, PO Box 211, 1000 AE Amsterdam, Netherlands.

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