Background: Autoimmune hepatitis is a chronic inflammatory disease, the abnormal immunological function is the main pathogenesis. Interleukin-34 is a newly identified cytokine that shares the same receptor as colony stimulating factor-1.
Methods: We used interleukin-34 knockout and wild-type mice in a Con A-induced hepatitis model and cocultured RAW264.7 macrophage cells with interleukin-34. We then detected associated inflammatory cytokine and chemokine levels to elucidate the role of interleukin-34.
Results: In this study, we found that the loss of interleukin-34 resulted in higher sensitivity to Con A-induced hepatitis. RAW264.7 macrophage cells were able to differentiate to the M2 phenotype upon interleukin-34 stimulation.
Conclusions: We conclude that interleukin-34 may protect the liver from Con A-mediated hepatitis by driving M2 macrophage polarization and suppressing inflammation.
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http://dx.doi.org/10.1016/j.prp.2019.152493 | DOI Listing |
Nat Commun
December 2024
Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China.
The potential for mitigating intestinal inflammation through the gut-bone axis in the treatment of osteoporosis is significant. While various gut-derived postbiotics or bacterial metabolites have been created as dietary supplements to prevent or reverse bone loss, their efficacy and safety still need improvement. Herein, a colon-targeted drug delivery system is developed using surface engineering of polyvinyl butyrate nanoparticles by shellac resin to achieve sustained release of postbiotics butyric acid at the colorectal site.
View Article and Find Full Text PDFNat Commun
December 2024
Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan, Taiwan.
Immune checkpoint inhibitors (ICI) represent new anticancer agents and have been used worldwide. However, ICI can potentially induce life-threatening severe cutaneous adverse reaction (SCAR), such as Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN), hindering continuous ICI therapy. We examine 6 cohorts including 25 ICI-induced SJS/TEN patients and conduct single-cell RNA sequencing (scRNA-seq) analysis, which shows overexpression of macrophage-derived CXCL10 that recruits CXCR3 cytotoxic T lymphocytes (CTL) in blister cells from ICI-SJS/TEN skin lesions.
View Article and Find Full Text PDFKaohsiung J Med Sci
December 2024
Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, China.
This study aimed to investigate whether activation of PPARγ regulates M1/M2 macrophage polarization to attenuate dextran sulfate sodium salt (DSS)-induced inflammatory bowel disease (IBD) via the STAT-1/STAT-6 pathway in vivo and in vitro. We first examined the effect of PPARγ on macrophage polarization in LPS/IFN-γ-treated M1 RAW264.7 cells and IL-4/IL-13-treated M2 RAW264.
View Article and Find Full Text PDFBiosci Biotechnol Biochem
December 2024
Faculty of Science and Technology, Keio University, Yokohama, Japan.
Most actinomycetes and fungi have a multitude of silent biosynthetic genes whose activation could lead to the production of new natural products. Our group recently designed and used a co-culture method to isolate new natural products, based on the idea that pathogens might produce immune suppressors to avoid attack by immune cells. Here, we searched for compounds produced by the co-culture of immune cells with pathogenic fungi isolated from clinical specimens.
View Article and Find Full Text PDFCytojournal
November 2024
Department of Cardiology, Huashan Hospital, Fudan University, Shanghai, China.
Objective: Macrophages perform vital functions in cardiac remodeling after myocardial infarction (MI). Transglutaminase 2 (TG2) participates in fibrosis. Nevertheless, the role of TG2 in MI and mechanisms underlying macrophage polarization are unclear.
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