Macrophages treated with TGFβ2 (TGFβ2-Mϕ) and antigen are highly tolerogenic in vivo, and induce antigen-specific and long-lasting tolerance in both naïve and primed mice via induction of suppressor/regulatory T cells. In this study, we examined the molecular pathways, including the requirements for Smad-dependent signaling, that are involved in the induction and function of tolerogenic TGFβ2-Mϕ. Treatment of murine macrophages with TGFβ2 induced translocation of Smad2/3 to the nucleus, and impairment of Smad3-, but not Smad2-, dependent signaling inhibited the tolerogenic function of a TGFβ2-treated murine macrophage cell line. Gene expression in murine macrophages treated with TGFβ2 was evaluated by microarray analysis. The FcγRI gene was one of a number of immune-related genes differentially expressed in TGFβ2-Mϕ, and appeared to be critical for tolerance in this system, since TGFβ2-Mϕ from FcγRI deficient mice were unable to induce tolerance. The role that FcγRI plays in TGFβ2-Mϕ-mediated tolerance is currently unclear. The results of this study provide important information about the factors that are critical for the induction of TGFβ2-Mϕ-mediated tolerance, and a better understanding of these mechanisms could lead to the development of more effective tolerance-inducing strategies for the treatment of autoimmune/inflammatory diseases.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3936576 | PMC |
| http://dx.doi.org/10.1016/j.imbio.2013.04.003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cytokine therapy of acute radiation syndrome.
Best Pract Res Clin Haematol
December 2024
Centre for Haematology, Department of Immunology and Inflammation, Imperial College London, London, SW7 2AZ, UK.
Radiological accidents/incidents are common with nearly 400 reported since 1944 exposing about 3000 people to substantial doses of ionizing radiations with 127 deaths. Damage to hematopoietic stem and progenitor cells with resulting bone marrow failure is a common consequence of exposure to whole body acute high-dose and -dose-rate ionizing radiations and is termed hematopoietic-acute radiation syndrome, or H-ARS. Therapy of H-ARS includes transfusions, anti-bacterial and -viral drugs, molecularly-cloned hematopoietic growth factors and hematopoietic cell transplants.
View Article and Find Full Text PDFFc-mediated immune stimulating, pro-inflammatory and antitumor effects of anti-HER2 IgE against HER2-expressing and trastuzumab-resistant tumors.
J Immunother Cancer
March 2025
St. John's Institute of Dermatology, School of Basic & Medical Biosciences & KHP Centre for Translational Medicine, King's College London, London, UK
Background: Anti-human epidermal growth factor receptor 2 (HER2) IgG1-based antibody therapies significantly improve cancer prognosis, yet intrinsic or acquired resistance to fragment antigen-binding (Fab)-mediated direct effects commonly occurs. Most resistant tumors retain antigen expression and therefore remain potentially targetable with anti-HER2 therapies that promote immune-mediated responses. Tumor-antigen-specific IgE class antibodies can mediate powerful immune cell-mediated effects against different cancers and have been shown to activate IgE Fc receptor-expressing monocytes.
View Article and Find Full Text PDFHistological Assessment of the Anti-Inflammatory Effectiveness of Peperomia pellucida Extract Administered to the Gingival Sulcus in Rats Induced with Periodontitis.
Eur J Dent
March 2025
Departement of Oral Biology, Faculty of Dentistry, Jenderal Achmad Yani University, Jawa Barat, Indonesia.
This study aims to assess the impact of extract on periodontitis in rats, using the Papillary Bleeding Index (PBI), gingival index (GI), and histological evaluation of key inflammatory cells such as osteoclasts, osteoblasts, polymorphonuclear neutrophils (PMNs), macrophages, and fibroblasts to explore its potential in reducing inflammation and preserving periodontal tissue.The extract was prepared using the reflux method with 96% ethanol as a solvent, followed by phytochemical screening and antibacterial testing via the disk diffusion method. This study utilized a posttest control group experiment with 24 Wistar rats, divided into four groups: nonperiodontitis, no-treatment, chlorhexidine-treated (CHX), and extract-treated groups, with the latter three groups induced with periodontitis.
View Article and Find Full Text PDFSynergistic photothermal-sonodynamic therapy for antibacterial and immune reprogramming in chronic osteomyelitis.
J Control Release
March 2025
Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China. Electronic address:
The development of antibiotic resistance and inadequate immune response in chronic inflammation pose significant challenges in treating chronic osteomyelitis. As accepted non-antibiotic antimicrobial therapies, sonodynamic therapy (SDT) and photothermal therapy (PTT) are recognized for their effectiveness in eliminating bacteria and promoting tissue repair, rendering them promising therapeutic strategies for treating bacterial infections and preventing the emergence of drug-resistant bacteria. However, the antimicrobial action and efficacy in promoting tissue repair depend on the activation status of the host immune system.
View Article and Find Full Text PDFBackground: The pathogenesis of female pelvic floor polypropylene mesh complications is unclear as trials evaluating explanted mesh have not included asymptomatic controls.
Objectives: To compare explanted polypropylene mesh from those with and without mesh complications to determine the pathogenesis of the complications.
Methods: Between August 2019 and July 2020 66 participants attending Wesley and Royal Brisbane and Women's Hospital Urogynecology department with mesh complications and 15 undergoing repeat prolapse and/or continence surgery after prior polypropylene mesh implantation were included.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!