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Serotonin-induced miR-221/222 contribute to the activation of hepatic stellate cells

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Abstract

In the diseased liver, hepatic stellate cells (HSCs) transdifferentiate into “activated” myofibroblasts that then drive fibrogenesis by promoting the net deposition of extracellular matrix. This regulatory function requires stimulation of the 5-hydroxytryptamine 2B receptor (5-HT2B) on HSCs by serotonin (5-HT), which activates extracellular regulated protein kinases and the transcription factor JunD. However, the regulation mechanisms of 5-HT on microRNAs in the activation of HSCs need a thorough study. In this study, our data show that the expression of miR-221/222 increases with the stimulation of 5-HT and is correlated with the expression levels of alpha 1 type I collagen and α-smooth muscle actin in HSCs. Silencing against 5-HT2B attenuates miR-221/222 expression. Stimulation of stellate cells with 5-HT significantly upregulated miR-221/222 expression, while knockdown of JunD or treatment with the ERK inhibitor PD98059 significantly reduced miR-221/222 expression. miR-221 and miR-222 are potential targets in the quest for a cure for human liver fibrosis.

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Abbreviations

5-HT:

serotonin

5-HT2B:

5-hydroxytryptamine 2B receptor

α-SMA:

α-smooth muscle actin

COL1A1:

alpha 1 type I collagen

DMEM:

dulbecco’s modified Eagle’s medium

ECM:

extracellular matrix

ERK:

extracellular regulated protein kinases

FBS:

fetal bovine serum

HCC:

hepatocellular carcinoma

HCV:

Hepatitis C virus

HSCs:

hepatic stellate cells

miRNAs:

microRNAs

NASH:

non-alcoholic steatohepatitis

TGF-β:

transforming growth factor beta

UTR:

untranslated region

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Acknowledgements

We would like to thank Dr. Hongwei Zhang for data analysis and critical discussion of the manuscript.

Funding

This study was supported partly by grants from the National Natural Science Foundation of China (81,972,214, 81,772,932, 81,472,202, 81,201,535, 81,302,065, 81,671,716, 81,301,993, 81,372,175 and 81,472,209), The Fundamental Research Funds for the Central Universities (22,120,170,212 and 22,120,170,117), Shanghai Natural Science Foundation (12ZR1436000), Shanghai Municipal Commission of Health and Family Planning (201540228), Wu Jieping Medical Foundation (320.6750.14326), Construction of Clinical Medical Center for tumor biological samples in Nantong (HS2016004) and Jiangsu 333 Program (BRA2017205).

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Authors

Contributions

YX, YSM, WS and DF designed the study. YX, YSM, JBL, ZJW, XPW and DF performed the cytological experiments. YSM, XPW, LPL, GRW, WS and DF performed the statistical analyses and interpreted the data. YX, JBL, ZJW, GRW and DF contributed to study materials and consumables. YX, ZJW and DF wrote the manuscript. YX, YSM, JBL and ZJW contributed equally to this work. All authors agreed with the results and conclusions.

Corresponding authors

Correspondence to Gao-Ren Wang, Da Fu or Wei Shi.

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The authors declare no potential conflicts of interest.

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Xiang, Y., Ma, YS., Liu, JB. et al. Serotonin-induced miR-221/222 contribute to the activation of hepatic stellate cells. Biologia 75, 997–1007 (2020). https://doi.org/10.2478/s11756-019-00376-y

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  • DOI: https://doi.org/10.2478/s11756-019-00376-y

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