1. Academic Validation
  2. IL-17A-stimulated endothelial fatty acid β-oxidation promotes tumor angiogenesis

IL-17A-stimulated endothelial fatty acid β-oxidation promotes tumor angiogenesis

  • Life Sci. 2019 Jul 15;229:46-56. doi: 10.1016/j.lfs.2019.05.030.
Ruirui Wang 1 Xiaohan Lou 1 Guang Feng 2 Jinfeng Chen 3 Linyu Zhu 1 Xiaomeng Liu 1 Xiaohan Yao 1 Pan Li 4 Jiajia Wan 1 Yi Zhang 5 Chen Ni 6 Zhihai Qin 7
Affiliations

Affiliations

  • 1 Medical Research Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China.
  • 2 Department of Orthopedics, Zhengzhou Central Hospital, Zhengzhou, Henan Province 450052, China.
  • 3 Research Center for Clinical System Biology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China.
  • 4 Department of Pathology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China.
  • 5 Biotherapy Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China.
  • 6 Medical Research Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China. Electronic address: nichen904@163.com.
  • 7 Medical Research Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, China; Key Laboratory of Protein and Peptide Pharmaceuticals, CAS-University of Tokyo Joint Laboratory of Structural Virology and Immunology, Institute of Biophysics, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Beijing, 100000, China. Electronic address: zhihai@ibp.ac.cn.
Abstract

Aims: Tumor growth is an angiogenesis-dependent process that requires sustained new vessel growth. Interleukin-17 (IL-17A) is a key cytokine that modulates tumor progression. However, whether IL-17A affects the metabolism of endothelial cells is unknown.

Main methods: A xenograft model was established by implanting H460 (human lung Cancer cell line) cells transfected with IL-17A-expressing or control vector. The effects of IL-17A on sprouting and tube formation of human umbilical vein endothelial cells (HUVECs) were measured. After treatment with IL-17A, the proliferation and migration of HUVECs were examined. Liquid chromatography-mass spectrometry (LC-MS) and Seahorse were used to detect the effects of IL-17A on mitochondrial respiration and fatty acid β-oxidation (FAO) in HUVECs. Western blotting was used to examine signaling pathways.

Key findings: Herein, we found that IL-17A promoted H460 tumor growth and angiogenesis in vivo and in vitro. Moreover, IL-17A stimulated angiogenesis by enhancing FAO, increasing mitochondrial respiration of endothelial cells. The AMP-activated protein kinase (AMPK) signaling pathway was activated to promote FAO. Finally, IL-17A-induced angiogenesis was blocked when FAO was inhibited using etomoxir.

Significance: In summary, these results indicate that IL-17A stimulates angiogenesis by promoting FAO. Thus, our study might provide a new therapeutic target for angiogenic vascular disorders.

Keywords

AMPK; Angiogenesis; FAO; IL-17A; Mitochondrial respiration.

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