Cited by 171Liver physiology and pathologyFlavonoids in Medical ResearchLiver Disease Diagnosis and Treatment

The Flavonoid Quercetin Ameliorates Liver Inflammation and Fibrosis by Regulating Hepatic Macrophages Activation and Polarization in Mice

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Li, Xi, Jin, Qianwen, Yao, Qunyan, Xu, Beili, Li, Lixin, Zhang, Shuncai, Tu, Chuantao·2018·Frontiers in Pharmacology

Abstract

At present, there are no effective antifibrotic drugs for patients with chronic liver disease; hence, the development of antifibrotic therapies is urgently needed. Here, we performed an experimental and translational study to investigate the potential and underlying mechanism of quercetin treatment in liver fibrosis, mainly focusing on the impact of quercetin on macrophages activation and polarization. BALB/c mice were induced liver fibrosis by carbon tetrachloride (CCl4) for 8 weeks and concomitantly treated with quercetin (50 mg/kg) or vehicle by daily gavage. Liver inflammation, fibrosis, and hepatic stellate cells (HSCs) activation were examined. Moreover, massive macrophages accumulation, M1 macrophages and their related markers, such as tumor necrosis factor (TNF)-, interleukin (IL)-1β, IL-6 and monocyte chemotactic protein 1(MCP-1) in livers were analyzed. In vitro, we used Raw 264.7 cells to examine the effect of quercetin on M1-polarized macrophages activation. Our results showed that quercetin dramatically ameliorated liver inflammation, fibrosis, and inhibited HSCs activation. These results were attributed to the reductive recruitment of macrophages (F4/80+ and CD68+) into the liver in quercetin-treated fibrotic mice confirmed by immunostaining and expression levels of marker molecules. Importantly, quercetin strongly inhibited M1 polarization and M1-related inflammatory cytokines in fibrotic livers when compared with vehicle-treated mice. In vitro, studies further revealed that quercetin efficiently inhibited macrophages activation and M1 polarization, as well as decreased the mRNA expression of M1 macrophage markers such as TNF-, IL-1β, IL-6 and nitric oxide synthase 2 (NOS2). Mechanistically, the inhibition of M1 macrophages by quercetin was associated with the decrease levels of Notch1 expression on macrophages both in vivo and in vitro. Taken together, our data indicated that quercetin attenuated CCl4-induced liver inflammation and fibrosis in mice through inhibiting macrophages infiltration and modulating M1 macrophages polarization via targeting Notch1 pathway. Hence, quercetin holds promise as potential therapeutic agent for human fibrotic liver disease.

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  • Exposure to supernatant from VIS cells induced macrophage activation marked by an M1-like polarization profile, CD86 upregulation, and signs of secondary macrophage senescence detected by SA-β-gal staining and senescence-typical gene expression.

    “it was demonstrated that exposure to the supernatant of VIS cells induced macrophage activation that was marked by an M1-like polarization profile79,89, CD86 upregulation and signs of secondary macrophage senescence as detected by SA-β-gal staining and senescence-typical gene expression.”

    From COVID-19 and cellular senescence (2023) · cites this paper as [89]

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Authors
Li, X., Jin, Q., Yao, Q., Xu, B., Li, L., Zhang, S., & Tu, C.
Affiliations
Fudan University (CN)
Corresponding author
  • Zhang, Shuncai
  • Tu, Chuantao
Venue
Frontiers in Pharmacology
Published
2018-02-09
Volume
9
Pages
72-72
ISSN
1663-9812 (ISSN-L)
OpenAlex
W2793967975
Cited by
171
References
43
Citations by year
2026: 16 · 2025: 21 · 2024: 24 · 2023: 23 · 2022: 19 · 2021: 26 · 2020: 25 · 2019: 14 · 2018: 2
FWCI
10.50
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Pharmacology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (81170398)
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Health Sciences › Medicine › Pharmacology › Flavonoids in Medical Research
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
Keywords
quercetin, liver fibrosis, liver inflammation, hepatic macrophages, M1 macrophage polarization, Notch1 signaling, hepatic stellate cell activation, carbon tetrachloride-induced liver injury, antifibrotic therapy, chronic liver disease, inflammatory cytokines, nitric oxide synthase 2, macrophage infiltration, flavonoids

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