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https://www.readbyqxmd.com/read/28105653/properdin-and-factor-h-production-by-human-dendritic-cells-modulates-their-t-cell-stimulatory-capacity-and-is-regulated-by-ifn-%C3%AE
#1
Karen O Dixon, Joseph O'Flynn, Ngaisah Klar-Mohamad, Mohamed R Daha, Cees van Kooten
Dendritic cells (DCs) and complement are both key members of the innate and adaptive immune response. Recent experimental mouse models have shown that production of alternative pathway (AP) components by DCs strongly affects their ability to activate and regulate T-cell responses. In this study we investigated the production and regulation of properdin (fP) and factor H (fH) both integral regulators of the AP, by DCs and tolerogenic DCs (tolDCs). Both fP and fH were produced by DCs, with significantly higher levels of both AP components produced by tolDCs...
January 20, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28105371/unfolding-anti-tumor-immunity-er-stress-responses-sculpt-tolerogenic-myeloid-cells-in-cancer
#2
REVIEW
Juan R Cubillos-Ruiz, Eslam Mohamed, Paulo C Rodriguez
Established tumors build a stressful and hostile microenvironment that blocks the development of protective innate and adaptive immune responses. Different subsets of immunoregulatory myeloid populations, including dendritic cells, myeloid-derived suppressor cells (MDSCs) and macrophages, accumulate in the stressed tumor milieu and represent a major impediment to the success of various forms of cancer immunotherapy. Specific conditions and factors within tumor masses, including hypoxia, nutrient starvation, low pH, and increased levels of free radicals, provoke a state of "endoplasmic reticulum (ER) stress" in both malignant cells and infiltrating myeloid cells...
2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28104390/progesterone-and-vip-cross-talk-enhances-phagocytosis-and-anti-inflammatory-profile-in-trophoblast-derived-cells
#3
Daiana Vota, Mariana Aguero, Esteban Grasso, Vanesa Hauk, Lucila Gallino, Elizabeth Soczewski, Claudia Pérez Leirós, Rosanna Ramhorst
Trophoblast cells produce several inmmuneregulators like the Vasoactive Intestinal Peptide (VIP) and P4 targeting multiple circuits, and also display an intese phagocytic ability allowing embryo implantation in a tolerogenic context. Here, we explored whether P4 and VIP- crosstalk modulates trophoblast cell function, focus on the phagocytic ability and the immune homeostasis maintenance. P4 enhanced the phagocytosis in trophoblast-derived cells quantified by the engulfment of latex-beads or eryptotic erythrocytes...
January 16, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28102055/role-of-regulatory-cells-in-oral-tolerance
#4
REVIEW
Marcin Wawrzyniak, Liam O'Mahony, Mübeccel Akdis
The immune system is continuously exposed to great amounts of different antigens from both food and intestinal microbes. Immune tolerance to these antigens is very important for intestinal and systemic immune homeostasis. Oral tolerance is a specific type of peripheral tolerance induced by exposure to antigen via the oral route. Investigations on the role of intestinal immune system in preventing hypersensitivity reactions to innocuous dietary and microbial antigens have been intensively performed during the last 2 decades...
March 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28100682/diet-derived-short-chain-fatty-acids-stimulate-intestinal-epithelial-cells-to-induce-mucosal-tolerogenic-dendritic-cells
#5
Gera Goverse, Rosalie Molenaar, Laurence Macia, Jian Tan, Martje N Erkelens, Tanja Konijn, Marlene Knippenberg, Emma C L Cook, Diana Hanekamp, Marc Veldhoen, Anita Hartog, Guus Roeselers, Charles R Mackay, Reina E Mebius
The gastrointestinal tract is continuously exposed to many environmental factors that influence intestinal epithelial cells and the underlying mucosal immune system. In this article, we demonstrate that dietary fiber and short chain fatty acids (SCFAs) induced the expression of the vitamin A-converting enzyme RALDH1 in intestinal epithelial cells in vivo and in vitro, respectively. Furthermore, our data showed that the expression levels of RALDH1 in small intestinal epithelial cells correlated with the activity of vitamin A-converting enzymes in mesenteric lymph node dendritic cells, along with increased numbers of intestinal regulatory T cells and a higher production of luminal IgA...
January 18, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28098786/retinoic-acid-and-its-role-in-modulating-intestinal-innate-immunity
#6
REVIEW
Paulo Czarnewski, Srustidhar Das, Sara M Parigi, Eduardo J Villablanca
Vitamin A (VA) is amongst the most well characterized food-derived nutrients with diverse immune modulatory roles. Deficiency in dietary VA has not only been associated with immune dysfunctions in the gut, but also with several systemic immune disorders. In particular, VA metabolite all-trans retinoic acid (atRA) has been shown to be crucial in inducing gut tropism in lymphocytes and modulating T helper differentiation. In addition to the widely recognized role in adaptive immunity, increasing evidence identifies atRA as an important modulator of innate immune cells, such as tolerogenic dendritic cells (DCs) and innate lymphoid cells (ILCs)...
January 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28096089/tolerogenic-interactions-between-cd8-dendritic-cells-and-nkt-cells-prevent-rejection-of-bone-marrow-and-organ-grafts
#7
David Hongo, Xiaobin Tang, Xiangyue Zhang, Edgar G Engleman, Samuel Strober
The combination of total lymphoid irradiation and anti-T cell antibodies safely induces immune tolerance to combined hematopoietic cell and organ allografts in humans. Our mouse model required host natural killer T (NKT) cells to induce tolerance. Since NKT cells normally depend on signals from CD8+ dendritic cells (DCs) for their activation, we used the mouse model to test the hypothesis that after lymphoid irradiation host CD8+DCs play a requisite role in tolerance induction through interactions with NKT cells...
January 17, 2017: Blood
https://www.readbyqxmd.com/read/28077574/platelet-activating-factor-mediates-endotoxin-tolerance-by-regulating-indoleamine-2-3-dioxygenase-dependent-expression-of-the-suppressor-of-cytokine-signaling-3
#8
Kyung Tae Noh, In Duk Jung, Gil Sun Cha, Myung-Kwan Han, Yeong-Min Park
Indoleamine 2, 3-dioxygenase (IDO) mediates immune tolerance, and suppressor of cytokine signaling 3 (SOCS3) negatively regulates the JAK/STAT signal transduction pathway. We previously determined plateletactivating factor (PAF) protects mice against lipopolysaccharide (LPS)-induced endotoxic shock, but its detailed mechanism of action was unknown. We performed survival experiments in IDO+/+ and IDO-/- mice using an LPSinduced endotoxemia model and rated organ injury (neutrophil infiltration, and liver function)...
January 11, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28073842/expression-of-cd14-il-10-and-tolerogenic-signature-in-dendritic-cells-inversely-correlate-with-response-to-tarp-vaccination-in-prostate-cancer-patients
#9
Luciano Castiello, Marianna Sabatino, Jiaqiang Ren, Masaki Terabe, Hanh Khuu, Lauren V Wood, Jay A Berzofsky, David F Stroncek
PURPOSE: Despite the vast number of clinical trials conducted so far, Dendritic cell (DC)-based cancer vaccines have mostly shown unsatisfactory results. Factors and manufacturing procedures essential for these therapeutics to induce effective anti-tumor immune responses have yet to be fully characterized. We here aimed to identify DC markers correlating with clinical and immunological response in a prostate carcinoma vaccination regimen. EXPERIMENTAL DESIGN: We performed an extensive characterization of DCs used to vaccinate 18 prostate carcinoma patients enrolled in a pilot trial of TCR gamma alternate reading frame protein (TARP) peptide vaccination (NCT00908258)...
January 10, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28069753/the-influence-of-the-microbiome-on-allergic-sensitization-to-food
#10
REVIEW
Catherine H Plunkett, Cathryn R Nagler
The alarming increase in the incidence and severity of food allergies has coincided with lifestyle changes in Western societies, such as dietary modifications and increased antibiotic use. These demographic shifts have profoundly altered the coevolved relationship between host and microbiota, depleting bacterial populations critical for the maintenance of mucosal homeostasis. There is increasing evidence that the dysbiosis associated with sensitization to food fails to stimulate protective tolerogenic pathways, leading to the development of the type 2 immune responses that characterize allergic disease...
January 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28067304/weissella-cibaria-wikim28-ameliorates-atopic-dermatitis-like-skin-lesions-by-inducing-tolerogenic-dendritic-cells-and-regulatory-t-cells-in-balb-c-mice
#11
Seul Ki Lim, Min-Sung Kwon, Jieun Lee, Young Joon Oh, Ja-Young Jang, Jong-Hee Lee, Hae Woong Park, Young-Do Nam, Myung-Ji Seo, Seong Woon Roh, Hak-Jong Choi
The occurrence of atopic dermatitis (AD), a chronic inflammatory skin disease, has been increasing steadily in children and adults in recent decades. In this study, we evaluated the ability of the lactic acid bacterium Weissella cibaria WIKIM28 isolated from gatkimchi, a Korean fermented vegetable preparation made from mustard leaves, to suppress the development of AD induced by 2,4-dinitrochlorobenzene in a murine model. Oral administration of W. cibaria WIKIM28 reduced AD-like skin lesions, epidermal thickening, and serum immunoglobulin E levels...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28065340/enhancing-allergen-presentation-platforms-for-sublingual-immunotherapy
#12
REVIEW
P Moingeon, V Lombardi, V Baron-Bodo, L Mascarell
Sublingual immunotherapy (SLIT) relies on high doses of allergens to treat patients with type I allergies. Although SLIT is commonly performed without any adjuvant or delivery system, allergen(s) could be further formulated with allergen-presentation platforms to better target oral dendritic cells eliciting regulatory immune responses. Improving the availability of allergens to the immune system should enhance SLIT efficacy, while allowing to decrease allergen dosing. Herein, we present an overview of adjuvants and vector systems that have been, or could be, considered as candidate allergen-presentation platforms for the sublingual route...
January 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28064157/fviii-specific-human-chimeric-antigen-receptor-car-t-regulatory-cells-suppress-t-and-b-cell-responses-to-fviii
#13
Jeongheon Yoon, Anja Schmidt, Ai-Hong Zhang, Christoph Königs, Yong Chan Kim, David W Scott
Replacement therapy with factor VIII (FVIII) is used in hemophilia A patients for treatment of bleeding episodes or for prophylaxis. A common and serious problem with this therapy is the patient's immune response to FVIII, due to a lack of tolerance, leading to the formation of inhibitory antibodies. Development of tolerogenic therapies, other than standard ITI, is an unmet goal. We previously generated engineered antigen- specific regulatory T cells (Tregs), created by transduction of a recombinant T cell receptor (TCR) isolated from a hemophilia A subject's T cell clone...
November 15, 2016: Blood
https://www.readbyqxmd.com/read/28053236/cd8-t-cells-that-coexpress-ror%C3%AE-t-and-t-bet-are-functionally-impaired-and-expand-in-patients-with-distal-bile-duct-cancer
#14
Stalin Chellappa, Harald Hugenschmidt, Morten Hagness, Saranya Subramani, Espen Melum, Pål Dag Line, Knut-Jørgen Labori, Gro Wiedswang, Kjetil Taskén, Einar Martin Aandahl
CD8(+) T cells that express retinoic acid-related orphan receptor (ROR)γt (TC17 cells) have been shown to promote procarcinogenic inflammation and contribute to a tolerogenic microenvironment in tumors. We investigated their phenotype and functional properties in relationship to the pathogenesis of human distal bile duct cancer (DBDC). DBDC patients had an elevated level of type 17 immune responses and the frequency of CD8(+)RORγt(+) T cells (TC17 cells) was increased in peripheral blood. The CD8(+)RORγt(+) T cells represented a highly activated subset and produced IL-17A in equal amount as CD4(+)RORγt(+) T cells (TH17 cells)...
January 4, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28008279/activation-homing-and-role-of-the-mesenchymal-stem-cells-in-the-inflammatory-environment
#15
REVIEW
Lukáš Zachar, Darina Bačenková, Ján Rosocha
Human mesenchymal stem cells (MSCs) are considered to be a promising source of cells in regenerative medicine. They have large potential to differentiate into various tissue-specific populations and may be isolated from diverse tissues in desired quantities. As cells of potential autologous origin, they allow recipients to avoid the alloantigen responses. They also have the ability to create immunomodulatory microenvironment, and thus help to minimize organ damage caused by the inflammation and cells activated by the immune system...
2016: Journal of Inflammation Research
https://www.readbyqxmd.com/read/28003813/context-specific-and-immune-cell-dependent-antitumor-activities-of-%C3%AE-1-antitrypsin
#16
Ofer Guttman, Gabriella S Freixo-Lima, Ziv Kaner, Yotam Lior, Peleg Rider, Eli C Lewis
α1-antitrypsin (AAT), a circulating glycoprotein that rises during acute phase responses and healthy pregnancies, exhibits immunomodulatory properties in several T-cell-dependent immune pathologies. However, AAT does not directly interfere with T-cell responses; instead, it facilitates polarization of macrophages and dendritic cells towards M2-like and tolerogenic cells, respectively. AAT also allows NK cell responses against tumor cells, while attenuating DC-dependent induction of autoimmune NK cell activities...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27999564/distinct-hepatic-macrophage-populations-in-lean-and-obese-mice
#17
REVIEW
Rafael Mayoral Monibas, Andrew M F Johnson, Olivia Osborn, Paqui G Traves, Sushil K Mahata
Obesity is a complex metabolic disorder associated with the development of non-communicable diseases such as cirrhosis, non-alcoholic fatty liver disease, and type 2 diabetes. In humans and rodents, obesity promotes hepatic steatosis and inflammation, which leads to increased production of pro-inflammatory cytokines and acute-phase proteins. Liver macrophages (resident as well as recruited) play a significant role in hepatic inflammation and insulin resistance (IR). Interestingly, depletion of hepatic macrophages protects against the development of high-fat-induced steatosis, inflammation, and IR...
2016: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/27999239/effect-of-mesenchymal-stem-cells-on-ilt3-expression-in-the-splenocytes-of-skin-graft-recipient-mice
#18
Ali Moravej, Mohammad-Hossein Karimi, Bita Geramizadeh, Mahdokht Hossein Aghdaie, Omid Kohi-Hoseinabadi, Salimeh Ebrahimnezhad
BACKGROUND: Mesenchymal stem cells (MSCs) are considered as effective therapeutic cells in transplantation due to their immunomodulatory activities. However, precise mechanism of MSCs immunomodulatory activity is not completely understood. OBJECTIVES: To study the role of Immunoglobulin-like transcripts-3 (ILT3) immunomodulatory receptor in immune tolerance induced by MSCs in skin transplantation model and induction of tolerogenic dendritic cells (Tol-DCs) by MSCs through up-regulation of ILT3...
December 2016: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/27996081/tolerogenic-probiotics-potential-immunoregulators-in-systemic-lupus-erythematosu
#19
REVIEW
Seyed Alirezae Esmaeili, Mahmoud Mahmoudi, Amir Abbas Momtazi-Borojeni, Amirhossein Sahebkar, Hassan Doulabi, Maryam Rastin
Probiotics are commensal or nonpathogenic microbes that colonize the gastrointestinal tract and confer beneficial effects on the host through several mechanisms such as competitive exclusion, anti-bacterial effects, and modulation of immune responses. There is growing evidence supporting the immunomodulatory ability of some probiotics. Several experimental and clinical studies have been shown beneficial effect of some probiotic bacteria, particularly Lactobacillus and Bifidobacteria strains, on inflammatory and autoimmune diseases...
December 20, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27995404/circulating-zonulin-correlates-with-density-of-enteroviruses-and-tolerogenic-dendritic-cells-in-the-small-bowel-mucosa-of-celiac-disease-patients
#20
Tamara Vorobjova, Helerin Raikkerus, Lumme Kadaja, Ija Talja, Oivi Uibo, Kaire Heilman, Raivo Uibo
BACKGROUND: Impaired intestinal integrity, including increased permeability of the small bowel mucosa, has been shown in patients with celiac disease (CD) as well as with type 1 diabetes (T1D). Zonulin (ZO, pre-haptoglobin), a tight junction regulator, plays a particular role in the regulation of intestinal barrier function and in the pathogenesis of the above-mentioned diseases. AIM: To investigate whether enteroviruses (EVs) and immunoregulatory cells are associated with intestinal permeability in patients with CD alone and with coexistent T1D...
December 19, 2016: Digestive Diseases and Sciences
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