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Soluble epoxide hydrolase inhibitor 1-trifluoromethoxyphenyl-3- (1-propionylpiperidin-4-yl) urea attenuates bleomycin-induced pulmonary fibrosis in mice

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An Erratum to this article was published on 05 March 2016

Abstract

Epoxyeicosatrienoic acids (EETs), the metabolites of arachidonic acid derived from the cytochrome P450 (CYP450) epoxygenases, are mainly metabolized by soluble epoxide hydrolase (sEH) to their corresponding diols. EETs but not their diols, have anti-inflammatory properties and inhibition of sEH might provide protective effects against inflammatory fibrosis. We test the effects of a selected sEH inhibitor, 1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl) urea (TPPU), on bleomycin-induced pulmonary fibrosis (PF) in mice. A mouse model of PF was established by intratracheal injection of bleomycin and TPPU was administered for 21 days after bleomycin injection. We found TPPU treatment improved the body weight loss and survival rate of bleomycin-stimulated mice. Histological examination showed that TPPU treatment alleviated bleomycin-induced inflammation and maintained the alveolar structure of the pulmonary tissues. TPPU also decreased the bleomycin-induced deposition of collagen and the expression of procollagen I mRNA in lung tissues of mice. TPPU decreased the transforming growth factor-β1 (TGF-β1), interleukin-1β (IL-1β) and IL-6 levels in the serum of bleomycin-stimulated mice. Furthermore, TPPU inhibited the proliferation and collagen synthesis of mouse fibroblasts and partially reversed TGF-β1-induced α-smooth muscle actin expression. Our results indicate that the inhibition of sEH attenuates bleomycin-induced inflammation and collagen deposition and therefore prevents bleomycin-induced PF in a mouse model.

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Acknowledgments

This work was supported by the Special Funds for Major State Basic Research Projects (2012CB518104), National Natural Science Foundation of China (No. 81170059), Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (20130162110052) and was partially funded by the NIEHS grant ES02710 and American Asthma Foundation #09-0269.

Conflict of interest

The authors report no conflict of interest.

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Authors and Affiliations

  1. Department of Physiology, Xiangya School of Medicine, Central South University, Changsha, Hunan, 410078, People’s Republic of China

    Yong Zhou, Guo-Ying Sun, Tian Liu, Jia-Xi Duan, Hui-Fang Zhou & Cha-Xiang Guan

  2. Department of Entomology and the UC Davis Cancer Center, University of California Davis, Davis, CA 95616, USA

    Kin Sing Lee & Bruce D. Hammock

  3. Department of Neurology, University of Texas Medical Branch, Galveston, TX 77555, USA

    Xiang Fang

  4. State Key Laboratory of Trauma, Burns, and Combined Injury, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, Sichuan, 400042, People’s Republic of China

    Jian-Xin Jiang

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  1. Yong Zhou
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  2. Guo-Ying Sun
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  3. Tian Liu
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  8. Xiang Fang
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Correspondence to Jian-Xin Jiang or Cha-Xiang Guan.

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Zhou, Y., Sun, GY., Liu, T. et al. Soluble epoxide hydrolase inhibitor 1-trifluoromethoxyphenyl-3- (1-propionylpiperidin-4-yl) urea attenuates bleomycin-induced pulmonary fibrosis in mice. Cell Tissue Res 363, 399–409 (2016). https://doi.org/10.1007/s00441-015-2262-0

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  • DOI: https://doi.org/10.1007/s00441-015-2262-0

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