Cited by 153Liver physiology and pathologySphingolipid Metabolism and SignalingLiver Disease Diagnosis and Treatment

Sphingosine kinase 1 promotes liver fibrosis by preventing miR‐19b‐3p‐mediated inhibition of CCR2

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Lan, Tian, Li, Changzheng, Yang, Guizhi, Sun, Yue, Zhuang, Lihang, Ou, Yitao, Li, Hui, Wang, Genshu +3 more·2018·Hepatology

Abstract

Chronic liver disease mediated by activation of hepatic stellate cells (HSCs) and Kupffer cells (KCs) leads to liver fibrosis. Here, we aimed to investigate the molecular mechanism and define the cell type involved in mediating the sphingosine kinase (SphK)1‐dependent effect on liver fibrosis. The levels of expression and activity of SphK1 were significantly increased in fibrotic livers compared with the normal livers in human. SphK1 was coexpressed with a range of HSC/KC markers including desmin, α‐smooth muscle actin (α‐SMA) and F4/80 in fibrotic liver. Deficiency of SphK1 (SphK1 −/− ) resulted in a marked amelioration of hepatic injury, including transaminase activities, histology, collagen deposition, α‐SMA and inflammation, in CCl 4 or bile duct ligation (BDL)‐induced mice. Likewise, treatment with a specific inhibitor of SphK1, 5C, also significantly prevented liver injury and fibrosis in mice induced by CCl 4 or BDL. In cellular levels, inhibition of SphK1 significantly blocked the activation and migration of HSCs and KCs. Moreover, SphK1 knockout in KCs reduced the secretion of CCL2, and SphK1 knockout in HSCs reduced C‐C motif chemokine receptor 2 ([CCR2] CCL2 receptor) expression in HSCs. CCL2 in SphK1 −/− mice was lower whereas microRNA‐19b‐3p in SphK1 −/− mice was higher compared with wild‐type (WT) mice. Furthermore, microRNA‐19b‐3p downregulated CCR2 in HSCs. The functional effect of SphK1 in HSCs on liver fibrosis was further strengthened by the results of animal experiments using a bone marrow transplantation (BMT) method. Conclusion: SphK1 has distinct roles in the activation of KCs and HSCs in liver fibrosis. Mechanistically, SphK1 in KCs mediates CCL2 secretion, and SphK1 in HSCs upregulates CCR2 by downregulation of miR‐19b‐3p. (H epatology 2018).

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Authors
Lan, T., Li, C., Yang, G., Sun, Y., Zhuang, L., Ou, Y., Li, H., Wang, G., Kisseleva, T., Brenner, D., & Guo, J.
Affiliations
  • Guangdong Pharmaceutical University (CN)
  • Sun Yat-sen University (CN)
  • University of California San Diego (US)
Corresponding author
Guo, Jiao
Venue
Hepatology
Published
2018-04-27
Volume
68
Issue
3
Pages
1070-1086
ISSN
  • 0270-9139 (ISSN-L)
  • 1527-3350
OpenAlex
W2794128955
Cited by
153
References
38
Citations by year
2026: 5 · 2025: 14 · 2024: 18 · 2023: 24 · 2022: 22 · 2021: 26 · 2020: 23 · 2019: 12 · 2018: 9
FWCI
10.97
Type
journal article
Language
en
Open access
Locations
  • Hepatology (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by-nc-nd)
Funders
  • National Natural Science Foundation of China (81530102)
  • Fudan University
  • Natural Science Foundation of Guangdong Province (2016A030311014)
  • Guangdong Pharmaceutical University
  • University of California, San Diego
  • Science and Technology Planning Project of Guangdong Province (2017A020211007)
  • National Institute on Alcohol Abuse and Alcoholism (R01AA028550)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK111866, R01DK101737, R01DK099205)
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sphingolipid Metabolism and Signaling
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
Keywords
sphingosine kinase 1, liver fibrosis, miR-19b-3p, CCR2, MCP-1, hepatic stellate cells, Kupffer cells, chronic liver disease, chemokine signaling, bone marrow transplantation, bile duct ligation, carbon tetrachloride
MeSH terms
Sphingosine Kinase, Animals, Humans, Kupffer Cells, Liver Cirrhosis, Mice, Inbred C57BL, Bone Marrow Transplantation, Phosphotransferases (Alcohol Group Acceptor), Mice, Knockout, Chemokine CCL2, MicroRNAs, Receptors, CCR2, Hepatic Stellate Cells

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