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The differential expression of novel circular RNAs in an acute lung injury rat model caused by smoke inhalation

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Abstract

Acute lung injury caused by smoke inhalation is a common severe clinical syndrome. This study aimed to investigate the potential expression of circular RNAs during acute lung injury triggered by smoke inhalation. The acute lung injury rat model was established with smoke inhalation from a self-made smoke generator. The occurrence of acute lung injury was validated by an analysis of the bronchoalveolar lavage fluid and hematoxylin-eosin (HE) staining of lung tissues. Next-generation sequencing and quantitative PCR were performed to identify the differentially expressed circular RNAs associated with acute lung injury that was caused by smoke inhalation. The circular form of the identified RNAs was finally verified by multiple RT-PCR-based assays. The bronchoalveolar lavage fluid (BALF) and lung tissue analysis showed that smoke inhalation successfully induced acute injury in rats, as evidenced by the significantly altered cell numbers, including macrophages, neutrophils, and red blood cells, disrupted cell lining, and increased levels of interleukin-1β, tumor necrosis factor-alpha, and IL-8 in lung tissues. Ten significantly differentially expressed circular RNAs were identified with next-generation sequencing and RT-PCR. The circular form of these RNAs was verified by multiple RT-PCR-based assays. In conclusion, the identified circular RNAs were prevalently and differentially expressed in rat lungs after acute lung injury caused by smoke inhalation.

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Acknowledgements

This study was supported by Science and Technology Plan Projects of Guangdong Province (Nos. 2014A020212533 and 2014A020212707).

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Author notes

  1. Zhiqiang Ye and Xuhui Liu contributed equally to this work.

Authors and Affiliations

  1. Department of Emergency, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

    Zhiqiang Ye, Xuhui Liu, Ting Yu & Shigeng Li

  2. Department of Traditional Chinese Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

    Yuewu Yang

  3. Department of Hepatic Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China

    Xianling Zhang

  4. Department of Anesthesiology, The Third Affiliated Hospital, Sun Yat-sen University, No. 600, tianhe road, tianhe district, Guangzhou, 510000, China

    Yawei Feng & Gangjian Luo

Authors
  1. Zhiqiang Ye
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  2. Xuhui Liu
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  3. Yuewu Yang
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  4. Xianling Zhang
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  5. Ting Yu
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  6. Shigeng Li
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  7. Yawei Feng
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  8. Gangjian Luo
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Corresponding author

Correspondence to Gangjian Luo.

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All experiments were authorized by the Animal Care and Ethics Committee of Sun Yat-sen University.

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The authors have no conflicts of interest to declare.

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Ye, Z., Liu, X., Yang, Y. et al. The differential expression of novel circular RNAs in an acute lung injury rat model caused by smoke inhalation. J Physiol Biochem 74, 25–33 (2018). https://doi.org/10.1007/s13105-017-0598-5

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  • DOI: https://doi.org/10.1007/s13105-017-0598-5

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