Cited by 25Liver physiology and pathologyMicroRNA in disease regulationCongenital heart defects research

MicroRNA-378 is involved in hedgehog-driven epithelial-to-mesenchymal transition in hepatocytes of regenerating liver

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Kim, Jieun, Hyun, Jeongeun, Wang, Sihyung, Lee, Chanbin, Jung, Youngmi·2018·Cell Death & Disease

Abstract

Healthy livers have a remarkable regenerative capacity for reconstructing functional hepatic parenchyma after 70% partial hepatectomy (PH). Hepatocytes, usually quiescent in normal healthy livers, proliferate to compensate for hepatic loss after PH. However, the mechanism of hepatocyte involvement in liver regeneration remains unclear. Hedgehog (Hh) pathway plays an important role in tissue reconstitution by regulating epithelial-to-mesenchymal transition (EMT) in liver disease. MicroRNA (miRNA) is involved in cell proliferation and differentiation during embryonic development and carcinogenesis. It was recently reported that miR-378 inhibits transdifferentiation of hepatic stellate cells into myofibroblasts by suppressing Gli-Krüppel family member 3 (Gli3), the Hh-target gene. We hypothesized that miR-378 influences EMT in hepatocytes by interfering with Hh signaling during liver regeneration. As hepatocytes were highly proliferative after PH in mice, miR-378 and epithelial marker, Ppar-g or E-cadherin were downregulated, whereas both Hh activators, Smoothened (Smo) and Gli3, and the EMT-inducing genes, Tgfb, Snail and Vimentin, were upregulated in the regenerating livers and in hepatocytes isolated from them. Compared to cells with or without scramble miRNA, primary hepatocytes transfected with miR-378 inhibitor contained higher levels of Gli3 with increased expression of the EMT-promoting genes, Tgfb, Snail, Col1a1, and Vimentin, suggesting that miR-378 influenced EMT in hepatocytes. Smo-depleted hepatocytes isolated from PH livers of Smo-flox mice showed downregulation of EMT-promoting genes and Gli3, with upregulation of miR-378 and E-cadherin compared to Smo-expressing hepatocytes from PH liver. In addition, delivery hepatocyte-specific AAV8 viral vector bearing Cre recombinase into Smo-flox mice impeded EMT in Smo-suppressed hepatocytes of PH liver, indicating that Smo is critical for regulating hepatocyte EMT. Furthermore, the application of miR-378 mimic into mice with PH delayed liver regeneration by interrupting hepatocyte EMT. In conclusion, our results demonstrate that miR-378 is involved in hepatocyte EMT by regulating Hh signaling during liver regeneration.

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  • miR-378-3p is considered a modulator of epithelial-to-mesenchymal transition and is associated with inflammation and fibrosis through positive modulation of NF-kB and TNFα pathways.

    “The most overexpressed miRNA in patients’ cells was the miR-378-3p, which is considered a modulator of the epithelial-to-mesenchymal transition and is associated with inflammation and fibrosis through the positive modulation of NF-kB and TNFα pathways [167,168].”

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Authors
Kim, J., Hyun, J., Wang, S., Lee, C., & Jung, Y.
Affiliations
Pusan National University (KR)
Corresponding author
Jung, Youngmi
Venue
Cell Death & Disease
Published
2018-06-18
Volume
9
Issue
7
Pages
721-721
ISSN
2041-4889 (ISSN-L)
OpenAlex
W2808097951
Cited by
25
References
47
Citations by year
2026: 1 · 2024: 3 · 2023: 2 · 2022: 3 · 2021: 6 · 2020: 1 · 2019: 8 · 2018: 1
FWCI
2.51
Type
journal article
Language
en
Open access
Locations
  • Cell Death and Disease (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Research Foundation of Korea (2016R1A2B2007922)
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Congenital heart defects research
Keywords
Hedgehog signaling, epithelial-mesenchymal transition, hepatocyte transdifferentiation, liver regeneration, partial hepatectomy, Smoothened, Gli3, hepatocytes, E-cadherin, vimentin, snails, TGF-beta
MeSH terms
Smoothened Receptor, Animals, Liver, Liver Regeneration, Male, Mice, Inbred C57BL, Mice, Transgenic, Signal Transduction, Hepatocytes, MicroRNAs, Cell Proliferation, Mice, Hedgehog Proteins, Epithelial-Mesenchymal Transition

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