Cited by 60Pancreatitis Pathology and TreatmentPancreatic and Hepatic Oncology ResearchGut microbiota and health

Amuc_1100 pretreatment alleviates acute pancreatitis in a mouse model through regulating gut microbiota and inhibiting inflammatory infiltration

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Wang, Li-juan, Jin, Yuan-ling, Pei, Wen-long, Li, Jia-cong, Zhang, Rui-lin, Wang, Jia-ju, Lin, Wei·2024·Acta Pharmacologica Sinica

Abstract

Amuc_1100 is a membrane protein from Akkermansia muciniphila, which has been found to play a role in host immunological homeostasis in the gastrointestinal tract by activating TLR2 and TLR4. In this study we investigated the effects and underlying mechanisms of Amuc_1100 on acute pancreatitis (AP) induced in mice by intraperitoneal injection of caerulein and lipopolysaccharide (LPS). The mice were treated with the protein Amuc_1100 (3 μg, i.g.) for 20 days before caerulein injection. Cecal contents of the mice were collected for 16S rRNA sequencing. We found that pretreatment with Amuc_1100 significantly alleviated AP-associated pancreatic injury, reduced serum amylase and lipase. Amuc_1100 pretreatment significantly inhibited the expression of proinflammatory cytokines (TNF-α, IL-1β, IFN-γ and IL-6) in spleen and pancreas through inhibiting NF-κB signaling pathway. Moreover, Amuc_1100 pretreatment significantly decreased the inflammatory infiltration, accompanied by the reduction of Ly6C+ macrophages and neutrophils in the spleen of AP mice. Gut microbiome analysis showed that the abundance of Bacteroidetes, Proteobacteria, Desulfobacterota and Campilobacterota was decreased, while the proportion of Firmicutes and Actinobacteriota was increased in AP mice pretreated with Amuc_1100. We further demonstrated that Amuc_1100 pretreatment restored the enrichment of tryptophan metabolism, which was mediated by intestinal flora. These results provide new evidence that Amuc_1100 lessens the severity of AP through its anti-inflammatory properties with a reduction of macrophages and neutrophil infiltration, as well as its regulation of the composition of intestinal flora and tryptophan metabolism.

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  • Management of intestinal microbiota disruption centers on probiotic therapy.

    “Management of intestinal microbiota disruption centers on probiotic therapy (Li et al. 2022; Wang et al. 2024).”

    From Odoribacter laneus protects intestinal barrier by bile acid-FXR axis in acute pancreatitis (2026) · cites this paper as Wang et al. 2024

    The Discussion (page unavailable) says probiotics have been used alongside prebiotics and synbiotics to maintain gut microbiota balance in acute pancreatitis. The Introduction (page unavailable) describes restoring intestinal flora as a valuable treatment strategy, but the paper does not say management of microbiota disruption centers on probiotics, particularly beyond acute pancreatitis. (LLM, conf=0.86)

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  • Under the right conditions, some specific bacterial strains can alleviate AP, mitigate the risk of microbial interactions, and provide a specific mechanism.

    “Under the right conditions, some specific bacteria strains can alleviate AP, mitigate the risk of microbial interactions and provide a specific mechanism (Li et al. 2022; Wang et al. 2024).”

    From Odoribacter laneus protects intestinal barrier by bile acid-FXR axis in acute pancreatitis (2026) · cites this paper as Wang et al. 2024

    The Discussion reports that Amuc_1100 attenuated pancreatic injury in AP mice, while the microbiota results and Discussion describe changes in gut flora and tryptophan metabolism as possible mechanisms. But Amuc_1100 is a protein derived from a bacterium, not a bacterial strain administered in the study, and these passages do not establish that it mitigates the risk of microbial interactions. (LLM, conf=0.86)

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Authors
Wang, L.-J., Jin, Y.-L., Pei, W.-L., Li, J.-C., Zhang, R.-L., Wang, J.-J., & Lin, W.
Affiliations
Nanjing University of Chinese Medicine (CN)
Corresponding author
Lin, Wei
Venue
Acta Pharmacologica Sinica
Published
2023-11-27
Volume
45
Issue
3
Pages
570-580
ISSN
  • 0253-9756 (ISSN-L)
  • 1671-4083
  • 1745-7254
OpenAlex
W4389051433
Cited by
60
References
44
Citations by year
2026: 21 · 2025: 29 · 2024: 10
FWCI
16.08
Type
journal article
Language
en
Open access
Locations
  • Acta Pharmacologica Sinica (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Chinese Academy of Sciences
  • Government of Jiangsu Province
  • Natural Science Foundation of Jiangsu Province (BK20230064)
  • Nanjing University of Chinese Medicine (2020YLXK008)
  • Nanjing University
  • Fok Ying Tung Education Foundation (171033)
  • State Key Laboratory of Bioreactor Engineering
  • State Key Laboratory of Drug Research (SIMM2205KF, SIMM2205KF-15)
  • Shanghai Institute of Materia Medica, Chinese Academy of Sciences
Topics
  • Health Sciences › Medicine › Surgery › Pancreatitis Pathology and Treatment
  • Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
Amuc_1100, Akkermansia muciniphila, acute pancreatitis, gut microbiota, NF-κB signaling, tryptophan metabolism, macrophage infiltration, neutrophil infiltration, inflammatory cytokines, cerulein-induced pancreatitis, lipopolysaccharide, anti-inflammatory peptides, Firmicutes, Bacteroidetes
MeSH terms
Gastrointestinal Microbiome, Acute Disease, Animals, Ceruletide, Pancreatitis, RNA, Ribosomal, 16S, Tryptophan, Mice

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