Cited by 65Immune Response and InflammationT-cell and B-cell ImmunologyGut microbiota and health

TLR2/TLR4 activation induces Tregs and suppresses intestinal inflammation caused by Fusobacterium nucleatum in vivo

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Jia, Yin-ping, Wang, Kun, Zhang, Zhu-jun, Tong, Ya-nan, Han, Dan, Hu, Chun-yu, Li, Qian, Xiang, Yang +2 more·2017·PLOS ONE

Abstract

Toll-like receptors (TLRs) 2 and 4 play critical roles in intestinal inflammation caused by Fusobacterium nucleatum (F. nucleatum) infection, but the role of TLR2/TLR4 in regulation of proinflammatory cytokines remains unknown. In this study, through microarray analysis and qRT-PCR, we showed that TLR2/TLR4 are involved in the F. nucleatum-induced inflammatory signaling pathway in Caco-2 cells, C57BL/6 mice and human clinical specimens. In TLR2-/- and TLR4-/- mice, F. nucleatum infection resulted in increased colonization of the bacteria and production of the proinflammatory cytokines IL-8, IL-1β and TNF-α. In addition, the ratio of Foxp3+ CD4+ T cells in the total CD4+ T cells in TLR2-/- and TLR4-/- mice was less than that in wild-type mice, and the ratio in hybrid mice was more than that in knockout mice, which suggested that TLR2/TLR4 mediated the number of Tregs. Furthermore, it was observed that inflammatory cytokine levels were reduced in TLR2-/- mice after Treg transfer. Thus, these data indicate that TLR2/TLR4 regulate F. nucleatum-induced inflammatory cytokines through Tregs in vivo.

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Authors
Jia, Y.-P., Wang, K., Zhang, Z.-J., Tong, Y.-N., Han, D., Hu, C.-Y., Li, Q., Xiang, Y., Mao, X.-H., & Tang, B.
Affiliations
Army Medical University (CN)
Corresponding author
Tang, Bin
Venue
PLOS ONE
Published
2017-10-09
Volume
12
Issue
10
Pages
e0186179
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2760979956
Cited by
65
References
27
Citations by year
2026: 3 · 2025: 8 · 2024: 9 · 2023: 7 · 2022: 11 · 2021: 11 · 2020: 8 · 2019: 5 · 2018: 2 · 2017: 1
FWCI
1.98
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (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 (81501796)
  • the project of medical science and technology for training youth scholars of PLA (14QNP054)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
TLR2, TLR4, Fusobacterium nucleatum, regulatory T cells, Foxp3, intestinal inflammation, inflammatory cytokines, interleukin-8, IL-1β, TNF-α, Treg transfer, gut microbiota, Caco-2 cells, TLR2 knockout mice, TLR4 knockout mice
MeSH terms
Adult, Animals, Female, Fusobacterium Infections, Humans, Inflammation, Intestines, Male, Middle Aged, Signal Transduction, Fusobacterium nucleatum, Mice, Knockout, Caco-2 Cells, Microarray Analysis, T-Lymphocytes, Regulatory, Toll-Like Receptor 2, Toll-Like Receptor 4, Mice

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