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Immunosuppressive Polymeric Nanoparticles Targeting Dendritic Cells Alleviate Lupus Disease in < em > Fcgr2b < /em > < sup > -/- < /sup > Mice by Mediating Antigen-Specific Immune Tolerance
This study developed a new nanoparticle (NP) containing a biodegradable PDMAEMA-PLGA copolymer for target-oriented delivery to DCs in situ. PDMAEMA-PLGA NPs provided sustained drug release and exhibited immunosuppressive activity in FLT3L and GM-CSF-derived bone marrow in conventional DCs (BM-cDCs). PDMAEMA-PLGA NPs improved dexamethasone capability to convert wild-type and Fcgr2b-/- BM-cDCs from an immunogenic to tolerogenic state, and BM-cDCs treated with dexamethasone-incorporated PDMAEMA-PLGA NPs (Dex-NPs) efficiently mediated regulatory T cell (Treg) expansion in vitro. Dex-NP therapy potentially alleviated lupus dise...
Source: Cell Research - May 13, 2023 Category: Cytology Authors: Phuriwat Khiewkamrop Chamraj Kaewraemruaen Chonnavee Manipuntee Chalathan Saengruengrit Numpon Insin Asada Leelahavanichkul Warerat Kaewduangduen Opor Sonpoung Kasirapat Ariya-Anandech Nattiya Hirankarn Patcharee Ritprajak Source Type: research

Metabolic Control of Dendritic Cell Functions: Digesting Information
In conclusion, a delicate balance of the complex system of nutrient sensing and mTOR (mTORC1) signaling is crucial to ensure appropriate development of DCs (23). Strikingly, loss of both mTOR complexes results in opposite effects on in vivo DC development compared with loss of mTORC1 alone, probably indicating differential inhibition of mTOR downstream targets and collaboration of mTOR complexes. Indeed, DC loss upon TSC1 deficiency is accompanied by increased DC apoptosis and enhanced metabolic activity due to TSC1-dependent inhibition of Myc, an effector downstream of mTOR (Figure 1), and reversed upon Myc loss (35). Of ...
Source: Frontiers in Immunology - April 24, 2019 Category: Allergy & Immunology Source Type: research

Geniposide Alleviates Glucocorticoid-Induced Inhibition of Osteogenic Differentiation in MC3T3-E1 Cells by ERK Pathway
Conclusion In summary, we demonstrated that geniposide alleviated GC-induced osteogenic suppression in MC3T3-E1 cells. The effects of geniposide were at least partially associated with activating ERK signaling pathway via GLP-1 receptor. Geniposide might be a potential therapeutic agent for protection against GC-induced osteoporosis. Author Contributions BX, DX, CZ, and LW participated in research design. BX, JW, YL, XW, and ZZ conducted the experiments. BX, DX, and LW contributed new reagents or analytic tools and wrote or contributed to the writing of the manuscript. BX, JW, CZ, and DX performed the data analysis. Fu...
Source: Frontiers in Pharmacology - April 17, 2019 Category: Drugs & Pharmacology Source Type: research

Dietary Vitamin D3 Deficiency Increases Resistance to Leishmania (Leishmania) amazonensis Infection in Mice
Conclusion Altogether, our results indicate that dietary VitD deficiency is able to decrease lesion growth and provide an increase in Th1 response in C57BL/6 and BALB/c mice upon L. (L.) amazonensis infection, although it does not decrease parasite burden in either of the murine models used. Thus, VitD may contribute to host susceptibility to murine tegumentary leishmaniasis. Further studies on the influence of immunonutrition in the leishmaniases are needed to better understand the immunobiology of these diseases. Author Contributions HdMG conceived and designed the experiments. GO-S, DB, MM, JEP, JCP, TR, AdF-M, and L...
Source: Frontiers in cellular and infection microbiology - April 9, 2019 Category: Microbiology Source Type: research

Allergy inhibitory receptor ‐1 inhibits autoantibody production via upregulation of apoptotic debris clearance by macrophages
ConclusionAllergin ‐1 might play an inhibitory role in autoantibody production via upregulation of macrophage phagocytosis.
Source: International Journal of Rheumatic Diseases - December 16, 2018 Category: Rheumatology Authors: Akira Iizuka, Seiji Segawa, Yuya Kondo, Shunta Kaneko, Masahiro Yokosawa, Kotona Furuyama, Haruka Miki, Satoko Tahara ‐Hanaoka, Akira Shibuya, Hiroto Tsuboi, Daisuke Goto, Isao Matsumoto, Shiro Shibayama, Takayuki Sumida Tags: ORIGINAL ARTICLE Source Type: research

Differential Hrd1 Expression and B-Cell Accumulation in Eosinophilic and Non-eosinophilic Chronic Rhinosinusitis With Nasal Polyps.
CONCLUSIONS: Differential Hrd1 expression and B-cell accumulation between the ECRS and non-ECRS subsets suggests that they can exhibit distinct pathogenic mechanisms and play important roles in NP. PMID: 30306751 [PubMed]
Source: Allergy, Asthma and Immunology Research - October 13, 2018 Category: Allergy & Immunology Tags: Allergy Asthma Immunol Res Source Type: research

XXIV World Allergy Congress 2015
Table of Contents A1 Pirfenidone inhibits TGF-b1-induced extracellular matrix production in nasal polyp-derived fibroblasts Jae-Min Shin, Heung-Man Lee, Il-Ho Park A2 The efficacy of a 2-week course of oral steroid in the treatment of chronic spontaneous urticaria refractory to antihistamines Hyun-Sun Yoon, Gyeong Yul Park A3 The altered distribution of follicular t helper cells may predict a more pronounced clinical course of primary sjögren’s syndrome Margit Zeher A4 Betamethasone suppresses Th2 cell development induced by langerhans cell like dendr...
Source: World Allergy Organization Journal - April 18, 2016 Category: Allergy & Immunology Source Type: research

Fever and confusion in a returning soldier
A 36–year–old army engineer returned from a 6–week deployment in Afghanistan. He had complained of upper respiratory tract infection even before his travel. On return he was found to be increasingly sleepy and later developed unsteadiness, slurred speech and confusion. His initial blood tests were normal, with CSF and MRI suggesting signs of encephalitis. He continued to deteriorate, requiring intubation and ventilation. Several bacterial, viral, protozoal and fungal tests were negative. He developed pancytopenia requiring frequent packed red cell and platelet transfusions. Spleen was found to be marginal...
Source: Journal of Neurology, Neurosurgery and Psychiatry - October 9, 2013 Category: Neurosurgery Authors: Chandratheva, A., Singh, A. R., Sturman, S., Chaganti, S., Jacob, S. Tags: Immunology (including allergy), HIV/AIDS, Tropical medicine (infectious diseases), Drugs: CNS (not psychiatric), Epilepsy and seizures, Infection (neurology), Memory disorders (psychiatry) Association of British Neurologists (ABN) joint meeting with the Source Type: research

DEXterity of tolerogenic APCs
A promising therapeutic approach for inducing tolerance in autoreactive T cells is the use of APCs such as DCs and macrophages. In this issue of the European Journal of Immunology, Zheng et al. [Eur. J. Immunol. 2013. 43: 219–227] study the concept of “tolerogenic adjuvants” to induce tolerance via vaccination. These authors have previously identified dexamethasone (Dex) as an effective “tolerogenic adjuvant” and, in this study, they have identified a population of peripheral macrophages that is enriched by Dex treatment and that mediates Dex's tolerogenic effect. In addition to performing a phenotypic characteri...
Source: European Journal of Immunology - January 16, 2013 Category: Allergy & Immunology Authors: Katherine E. R. Stagliano, Joost J. Oppenheim Tags: Commentary Source Type: research

IL-17-producing CD4-CD8- T cells are expanded in the peripheral blood, infiltrate salivary glands and are resistant to corticosteroids in patients with primary Sjogren's syndrome
Conclusions These findings appear to be of great interest since the identification of a peculiar T-cell subset with pro-inflammatory activity, but resistant to corticosteroids, in an autoimmune disorder such as SS may help to design new specific treatments for the disease.
Source: Annals of the Rheumatic Diseases - January 4, 2013 Category: Rheumatology Authors: Alunno, A., Bistoni, O., Bartoloni, E., Caterbi, S., Bigerna, B., Tabarrini, A., Mannucci, R., Falini, B., Gerli, R. Tags: Immunology (including allergy), Renal medicine, Connective tissue disease, Systemic lupus erythematosus Basic and translational research Source Type: research

DEXterity of tolerogenic APCs.
Abstract A promising therapeutic approach for inducing tolerance in autoreactive T cells is the use of APCs such as DCs and macrophages. In this issue of the European Journal of Immunology, Zheng et al. [Eur. J. Immunol. 2013. 43: 219-227] study the concept of "tolerogenic adjuvants" to induce tolerance via vaccination. These authors have previously identified dexamethasone (Dex) as an effective "tolerogenic adjuvant" and, in this study, they have identified a population of peripheral macrophages that is enriched by Dex treatment and that mediates Dex's tolerogenic effect. In addition to performing a phenotypic ch...
Source: European Journal of Immunology - January 1, 2013 Category: Allergy & Immunology Authors: Stagliano KE, Oppenheim JJ Tags: Eur J Immunol Source Type: research