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TMEM88 modulates the secretion of inflammatory factors by regulating YAP signaling pathway in alcoholic liver disease

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Abstract

Objective

Transmembrane protein 88 (TMEM88), a new protein of increasing concern existed in cell membrane, inhibits the typical Wnt/β-catenin signaling pathway to play a regulatory role on cell proliferation by binding to Dishevelled-1. Until recently, the connection between TMEM88 and alcoholic liver disease is unknown. In this research, we explored the effect of TMEM88 on the secretion of inflammatory cytokines in ethanol (EtOH)-induced RAW264.7 cells, moreover, the function of YAP signaling pathway in EtOH-induced RAW264.7 cells were investigated.

Methods

We administered TMEM88 adenovirus (ADV-TMEM88) by tail vein injection into C57BL/6J mice in vivo. In vitro, RAW264.7 murine macrophages were stimulated with EtOH and were transfected with pEGFP-C1-TMEM88 and TMEM88 siRNA, respectively, protein expression and mRNA expression of IL-6 and IL-1β were assessed by Western Blotting and RT-qPCR, respectively.

Results

Our group found that the overexpression of TMEM88 led to an up-regulation of IL-6 and IL-1β secretion, hinting that it had the possibility of linking with the initiation, the development, and the end of inflammation. In addition to that, TMEM88 silencing reduced the secretion of IL-6 and IL-1β in RAW264.7 cells. Moreover, we demonstrated that the YAP signaling pathway under the action of EtOH was activated by TMEM88.

Conclusions

All in all, these experimental outcomes indicated that TMEM88 had an indispensable impact on EtOH-induced secretion of inflammatory cytokines (IL-6 and IL-1β) in RAW264.7 cells through YAP signaling pathway.

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Acknowledgements

We would like to thank Dr. He Chen, Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University for providing us with Serum biochemical analysis.

Funding

This project was supported by the National Natural Science Foundation of China (nos. 81700522, 81602344), the fund of Anhui medical university doctoral start research (no. 0601067101), Anhui Provincial Natural Science Foundation (1704a0802161, 1808085MH235). Soft science project of Anhui provincial science and technology department (1607a0202062).

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Authors

Contributions

Liang-yun Li, Chen-chen Yang designed the study. Li-su Wen and Yu-min Liu participated in the collecting and analyzing of the data. Hao-dong Li and Shuang Hu finished the manuscript. Hong Zhou, Jin-liang Wang and Hang Shen revised and edited the manuscript. Xiao-ming Meng, Jun Li and Tao Xu reviewed the manuscript. All authors approved the final version of the manuscript for publication.

Corresponding author

Correspondence to Tao Xu.

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Availability of data and materials

The data analysed during the current study are available from the corresponding author on reasonable request.

Ethics approval and consent to participate

The animal testing procedures have been approved by the Code of Ethics and reviewed and implemented according to the guidelines of the Animal Care and Use Committee of Anhui Medical University (number: LLSC20150348).

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Not applicable.

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The authors declare that they have no conflict of interest.

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Li, Ly., Yang, Cc., Li, Sw. et al. TMEM88 modulates the secretion of inflammatory factors by regulating YAP signaling pathway in alcoholic liver disease. Inflamm. Res. 69, 789–800 (2020). https://doi.org/10.1007/s00011-020-01360-y

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  • DOI: https://doi.org/10.1007/s00011-020-01360-y

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