TIM4+macrophages suppress the proinflammatory response to maintain the chronic alveolar echinococcosis infection
Open accessAbstract
Background: Alveolar echinococcosis (AE), a severe zoonotic disease predominantly endemic to pastoral regions, is characterized by hepatic parasitic lesions caused by Echinococcus multilocularis. Methods: This study investigated the role of T-cell immunoglobulin and mucin domain-4 (TIMD4/Tim-4) in patients with hepatic AE. In total, 129 patients were enrolled from the First Affiliated Hospital of Xinjiang Medical University between 1 March 2018 and 1 March 2021. Histological, genetic, and serological tests were employed to evaluate Tim-4 and inflammatory cytokine expression. The liver immune microenvironment at the middle and late stages of mice infected with E. multilocularis was established in vitro to assess cytokine dynamics and liver fibrosis biomarkers. Results: Clinical analysis revealed the upregulation of Tim-4 within the hepatic lesions of patients with AE, with its expression spatially localized to macrophage-enriched regions and functionally linked to extracellular inflammatory modulation. Meanwhile, the liver tissues of the patients had characteristic pathological changes in the vesicles and progressive fibrotic remodeling, concurrent with a significant suppression of proinflammatory cytokine activity. Tim-4+ macrophages inhibited the release of proinflammatory cytokines at the middle and late stages of E. multilocularis infection to maintain immune tolerance, and inhibition of Tim-4 expression may even reverse the level of liver fibrosis in vitro. Conclusions: Tim-4 attenuated the predominant proinflammatory response, thereby facilitating immune evasion by E. multilocularis. Notably, inhibition of Tim-4 in macrophages not only restored the inflammatory balance but also significantly reversed hepatic fibrotic progression.
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In chronic viral hepatitis or parasitic infections, excessive anti-inflammatory polarization may impair pathogen clearance and perpetuate chronic inflammation.
“In these settings, excessive anti-inflammatory polarization may impair pathogen clearance and perpetuate chronic inflammation, thereby reshaping macrophage function (129–135).”
From Strategies to promote liver fibrosis amelioration with involvement of restorative macrophages (2026) · cites this paper as [131]
The Discussion (page unavailable) says Tim-4+ macrophages suppress proinflammatory responses and promote parasite immune escape during chronic E. multilocularis infection. It also links parasitic infection to chronic hepatic inflammation and fibrosis. The paper does not establish the same mechanism in chronic viral hepatitis. (LLM, conf=0.84)
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- Authors
- Wang, L., Liu, Y., Ma, Y., Zhou, X., Aibibula, M., Zhang, X., Zhao, H., Zhou, J., Tian, F., & Ma, X.
- Affiliations
- Xinjiang Medical University (CN)
- First Affiliated Hospital of Xinjiang Medical University (CN)
- Corresponding author
- Tian, Fengming
- Ma, Xiumin
- Venue
- Frontiers in Cellular and Infection Microbiology
- Publisher
- Frontiers Media SA
- Published
- 2025-06-18
- Volume
- 15
- Pages
- 1600686-1600686
- ISSN
- 2235-2988 (ISSN-L)
- PMC
- PMC12213818
- OpenAlex
- W4411394830
- Cited by
- 11
- References
- 44
- Citations by year
- 2026: 8 · 2025: 3
- FWCI
- 7.31
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Frontiers in Cellular and Infection Microbiology (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Xinjiang Medical University
- Topics
- Health Sciences › Medicine › Pathology and Forensic Medicine › Parasitic infections in humans and animals
- Life Sciences › Immunology and Microbiology › Parasitology › Parasites and Host Interactions
- Health Sciences › Veterinary › Small Animals › Helminth infection and control
- Keywords
- alveolar echinococcosis, Echinococcus multilocularis, TIM-4, TIMD4, macrophages, inflammatory cytokines, immune tolerance, immune evasion, liver fibrosis, zoonotic parasitic disease
- MeSH terms
- Adult, Animals, Disease Models, Animal, Echinococcosis, Echinococcosis, Hepatic, Female, Humans, Inflammation, Liver, Liver Cirrhosis, Macrophages, Male, Membrane Proteins, Middle Aged, Cytokines, Echinococcus multilocularis, Mice
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