Fatty acid synthase is required for profibrotic TGF-b signaling

Mi Yeon Jung, Jeong Han Kang, Danielle M. Hernandez, Xueqian Yin, Mahefatiana Andrianifahanana, Youli Wang, Anatilde Gonzalez-Guerrico, Andrew Harold Limper, Ruth Lupu, Edward B Leof

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Evidence is provided that the fibroproliferative actions of TGF-b are dependent on a metabolic adaptation that sustains pathologic growth. Specifically, profibrotic TGF-b signaling is shown to require fatty acid synthase (FASN), an essential anabolic enzyme responsible for the de novo synthesis of fatty acids. With the use of pharmacologic and genetic approaches, we show that TGF-b-stimulated FASN expression is independent of Smad2/ 3 and is mediated via mammalian target of rapamycin complex 1. In the absence of FASN activity or protein, TGF-b-driven fibrogenic processes are reduced with no apparent toxicity. Furthermore, as increased FASN expression was also observed to correlate with the degree of lung fibrosis in bleomycin-treated mice, inhibition of FASN was examined in a murine-treatment model of pulmonary fibrosis. Remarkably, inhibition of FASN not only decreased expression of profibrotic targets, but lung function was also stabilized/improved, as assessed by peripheral blood oxygenation.—Jung, M.-Y., Kang, J.-H., Hernandez, D. M., Yin, X., Andrianifahanana, M., Wang, Y., Gonzalez-Guerrico, A., Limper, A. H., Lupu, R., Leof, E. B. Fatty acid synthase is required for profibrotic TGF-b signaling. FASEB J. 32, 3803–3815 (2018). www.fasebj.org

Original languageEnglish (US)
Pages (from-to)3803-3815
Number of pages13
JournalFASEB Journal
Volume32
Issue number7
DOIs
StatePublished - Jul 1 2018

Keywords

  • Fibrosis
  • Idiopathic pulmonary fibrosis
  • Metabolism

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Molecular Biology
  • Genetics

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    Jung, M. Y., Kang, J. H., Hernandez, D. M., Yin, X., Andrianifahanana, M., Wang, Y., Gonzalez-Guerrico, A., Limper, A. H., Lupu, R., & Leof, E. B. (2018). Fatty acid synthase is required for profibrotic TGF-b signaling. FASEB Journal, 32(7), 3803-3815. https://doi.org/10.1096/fj.201701187R