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oral tolerance immunology

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https://www.readbyqxmd.com/read/28295241/indirect-effects-of-immunological-tolerance-to-a-regular-dietary-protein-reduce-cutaneous-scar-formation
#1
Thiago Anselmo Cantaruti, Raquel Alves Costa, Kênia Soares de Souza, Nelson Monteiro Vaz, Cláudia Rocha Carvalho
Oral tolerance refers to the specific inhibition of immune responsiveness to T-cell dependent antigens contacted by the oral route before parenteral immunization. Oral tolerance to one protein does not inhibit immune responses to other unrelated proteins, but parenteral injection of tolerated antigens plus adjuvant into tolerant, but not normal mice inhibits immune responses to antigens injected concomitantly or soon thereafter. The inhibitory effect triggered by parenteral injection of tolerated proteins is known as bystander suppression or indirect effects of oral tolerance...
March 12, 2017: Immunology
https://www.readbyqxmd.com/read/28270799/participation-of-leukotrienes-in-the-immune-modulation-of-oral-tolerance
#2
Sandra R P de Oliveira, Auro Nomizo, Fabiani G Frantz, Lúcia H Faccioli, Ana Paula Keller de Matos, Emanuel Carrilho, Ana Afonso, Fernanda de Freitas Anibal
Oral tolerance (OT) is characterized as a peripheral immune tolerance form, in which, mature lymphocytes in lymphoid tissues associated with mucosa, become non-functional or hypo responsive due to prior oral administration of antigen. OT is an important immunological phenomenon due to its therapeutic potential in inflammatory processes and others diseases. Here we evaluated leukotriene role in the induction of OT, as well as, the production of cytokines IL-5 and IFN-γ in leukotriene deficient animals (knock-out)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28205558/plant-based-vaccines-for-oral-delivery-of-type-1-diabetes-related-autoantigens-evaluating-oral-tolerance-mechanisms-and-disease-prevention-in-nod-mice
#3
Amanda L Posgai, Clive H Wasserfall, Kwang-Chul Kwon, Henry Daniell, Desmond A Schatz, Mark A Atkinson
Autoantigen-specific immunological tolerance represents a central objective for prevention of type 1 diabetes (T1D). Previous studies demonstrated mucosal antigen administration results in expansion of Foxp3(+) and LAP(+) regulatory T cells (Tregs), suggesting oral delivery of self-antigens might represent an effective means for modulating autoimmune disease. Early preclinical experiments using the non-obese diabetic (NOD) mouse model reported mucosal administration of T1D-related autoantigens [proinsulin or glutamic acid decarboxylase 65 (GAD)] delayed T1D onset, but published data are conflicting regarding dose, treatment duration, requirement for combinatorial agents, and extent of efficacy...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28173607/review-suggests-that-the-immunoregulatory-and-anti-inflammatory-properties-of-allergenic-foods-can-provoke-oral-tolerance-if-introduced-early-to-infants-diets
#4
REVIEW
Despina-Zoe T Mermiri, Theodora Lappa, Athina L Papadopoulou
For years, the advice was to postpone introducing allergenic foods, in order to prevent food allergies. However, food allergies have escalated rather than declined and our review of the latest epidemiological, immunological and nutritional research suggests that early weaning practices may be beneficial. The most allergenic foods, such as fish, eggs and peanuts, have proved to be inherently rich in tolerogenic substances that can play a significant role in preventing allergies. CONCLUSION: We found evidence that the immunoregulatory and anti-inflammatory properties of allergenic foods can provoke oral tolerance if introduced early to both low-risk and high-risk infants...
February 7, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28141955/investigational-new-drugs-for-allergic-rhinitis
#5
REVIEW
Peter A Ricketti, Sultan Alandijani, Chen Hsing Lin, Thomas B Casale
Allergic rhinitis (AR) is a multifactorial disease characterized by paroxysmal symptoms of sneezing, rhinorrhea, postnasal drip and nasal congestion. For over a century, subcutaneous allergen immunotherapy (SCIT) has been recognized as the most effective therapy to date that may modify the underlying disease course and provide long-term benefits for individuals refractory to pharmacotherapy. However, over the past 25 years, there has been substantial growth in developing alternative therapies to traditional SCIT...
March 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28063050/analysis-of-leukocytes-in-oral-mucosal-tissues
#6
Asaf Wilensky, Gabriel Mizraji, Yaara Tabib, Hafez Sharawi, Avi-Hai Hovav
The oral mucosa is constantly exposed to an immense amount of microorganisms, while some colonize the various anatomical niches existing in the oral cavity. To deal with such a complex challenge, the oral mucosal immune system must tolerate commensal microorganisms but prevent invasion of pathogens. Such activity is likely to be achieved by a wide range of mechanisms that could be similar or different to those employed by other mucosal tissues. The dental biofilm represents a unique challenge to the mucosal immune system, and inadequate immune responses might lead to periodontal diseases and the associated adverse systemic complications...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28061324/oral-corticosterone-administration-reduces-insulitis-but-promotes-insulin-resistance-and-hyperglycemia-in-male-nonobese-diabetic-mice
#7
Susan J Burke, Heidi M Batdorf, Adrianna E Eder, Michael D Karlstad, David H Burk, Robert C Noland, Z Elizabeth Floyd, J Jason Collier
Steroid-induced diabetes is the most common form of drug-induced hyperglycemia. Therefore, metabolic and immunological alterations associated with chronic oral corticosterone were investigated using male nonobese diabetic mice. Three weeks after corticosterone delivery, there was reduced sensitivity to insulin action measured by insulin tolerance test. Body composition measurements revealed increased fat mass and decreased lean mass. Overt hyperglycemia (>250 mg/dL) manifested 6 weeks after the start of glucocorticoid administration, whereas 100% of the mice receiving the vehicle control remained normoglycemic...
January 4, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28059023/the-short-term-efficacy-of-bortezomib-combined-with-glucocorticoids-for-the-treatment-of-refractory-lupus-nephritis
#8
H Zhang, Z Liu, L Huang, J Hou, M Zhou, X Huang, W Hu, Z Liu
Objective The treatment of refractory lupus nephritis (LN) remains challenging for clinicians because these patients either do not respond to conventional therapy or relapse during the maintenance treatment period. The aim of this study was to investigate the efficacy and safety of bortezomib combined with glucocorticoids in refractory lupus patients. Methodology Five refractory LN patients aged 21 to 43 years (four females and one male) with biopsy-proven diagnosis (four with type IV and one with type V+IV) were recruited...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28029082/probiotics-in-curing-allergic-and-inflammatory-conditions-research-progress-and-futuristic-vision
#9
Kuldeep Dhama, Shyma K Latheef, Ashok Kumar Munjal, Rekha Khandia, Hari Abdul Samad, Hafiz M N Iqbal, Sunil K Joshi
BACKGROUND: Probiotics constitute the viable and beneficial microbes, which offer a dietary means to sustain the balance of gastro-intestinal (GI) microflora. Owing to their multiple health benefits, these have recently gained wide attention among researchers for exploring their potential in safeguarding the health of humans and animals. Probiotics could also modulate host-immune responses, thereby help in counteracting the immunological dysfunctions. Probiotics can inhibit the systemic invasion of pathogens entering through the GI mucosa/ oral cavity and have been found to possess effective prophylactic and therapeutic utilities against various infectious pathogens as well as non-infectious diseases and disorders...
December 26, 2016: Recent Patents on Inflammation & Allergy Drug Discovery
https://www.readbyqxmd.com/read/27919957/simultaneous-administration-of-statins-and-pioglitazone-limits-tumor-growth-in-a-rat-model-of-malignant-glioma
#10
Jorge Humberto Tapia-Pérez, Robert Preininger, Elmar Kirches, Annegret Reinhold, Jana Butzmann, Sylvia Prilloff, Christian Mawrin, Thomas Schneider
BACKGROUND/AIM: Statins are cholesterol reducers with considerable dose-dependent effect against glioma cells. The apoptotic effect could be increased by combining statins or by adding pioglitazone (PGZ). The last one is an anti-diabetic drug, an agonist of the peroxisome proliferator-activated receptor-gamma (PPARG). We used an animal model to test the effect of such combination in vivo and we investigated the changes on immunological processes. MATERIALS AND METHODS: Thirty-three rats (F344/DuCrl) were anesthetized and glioblastoma (F98) cells were implanted stereotactically...
2016: Anticancer Research
https://www.readbyqxmd.com/read/27863194/pomalidomide-for-symptomatic-kaposi-s-sarcoma-in-people-with-and-without-hiv-infection-a-phase-i-ii-study
#11
Mark N Polizzotto, Thomas S Uldrick, Kathleen M Wyvill, Karen Aleman, Cody J Peer, Margaret Bevans, Irini Sereti, Frank Maldarelli, Denise Whitby, Vickie Marshall, Priscila H Goncalves, Vikram Khetani, William D Figg, Seth M Steinberg, Jerome B Zeldis, Robert Yarchoan
Purpose Kaposi's sarcoma (KS) is a multicentric tumor caused by Kaposi's sarcoma-associated herpesvirus. Unmet needs include therapies that are oral, anthracycline sparing, and deliverable in resource-limited settings. We evaluated pomalidomide, an oral immune modulatory agent, in patients with symptomatic KS. Methods The primary objectives were to assess tolerability, pharmacokinetics, and activity. Initial dosage level was 5 mg once per day for 21 days per 28-day cycle, with a de-escalated level of 3 mg if not tolerable, and aspirin 81 mg once per day thromboprophylaxis...
December 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27830928/oral-iron-absorption-test-with-ferrous-bisglycinate-chelate-in-children-with-celiac-disease-preliminary-results
#12
Giuseppe A Mazza, Luisa Pedrelli, Elisabetta Battaglia, Laura Giancotti, Roberto Miniero
BACKGROUND: Celiac disease (CD) is an immunologically-mediated enteropathy resulting in small-bowel mucosal villous atrophy with crypt hyperplasia. Iron malabsorption is usually observed in CD. Only few studies investigated oral iron absorption in subjects with gastrointestinal diseases and Iron Deficiency Anemia (IDA), using the oral iron absorption test (OIAT). We considered useful to investigate the OIAT, using Ferrous Bisglycinate Chelate (FBC), in patients with CD at diagnosis or on Gluten Free Diet (GFD) from at least 1 year...
November 10, 2016: Minerva Pediatrica
https://www.readbyqxmd.com/read/27799957/prospective-evaluation-of-testing-with-baked-milk-to-predict-safe-ingestion-of-baked-milk-in-unheated-milk-allergic-children
#13
Allison Kwan, Maria Asper, Sasson Lavi, Elana Lavine, David Hummel, Julia E Upton
BACKGROUND: Cow's milk allergy is one of the most common food allergies affecting young children. A subset of milk-allergic individuals can eat baked milk without allergic symptoms which is beneficial in terms of prognostication and liberalization of the diet. A retrospective study suggested that skin prick testing (SPT) with a baked milk (muffin) slurry may provide a sensitive means of predicting the outcome of a medically supervised baked milk oral food challenge. We evaluated the predictive value of SPT with baked milk to identify unheated milk-allergic children who are able to safely eat baked milk...
2016: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/27790717/in-utero-coxsackievirus-b4-infection-of-the-mouse-thymus
#14
H Jaïdane, A Halouani, H Jmii, F Elmastour, S Abdelkefi, G Bodart, H Michaux, T Chakroun, F Sane, M Mokni, V Geenen, D Hober, M Aouni
Type B coxsackievirus (CV-B) infections are involved frequently in the triggering of several autoimmune diseases such as myocarditis, dilated cardiomyopathy, pericarditis, pancreatitis, type 1 diabetes, encephalitis, thyroiditis or Sjögren's syndrome. Serological and virological evidence suggests that maternal infections during pregnancy can play a role in the appearance of these diseases in offspring. The current study aims to explore the effect of an in-utero CV-B infection on the fetal thymus, the central site for programming immunological self-tolerance...
March 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/27732129/new-pharmaceutical-approaches-for-the-treatment-of-food-allergies
#15
Ana Brotons-Canto, Nekane Martín-Arbella, Carlos Gamazo, Juan M Irache
Allergic diseases constitute one of the most common causes of chronic illness in developed countries. The main mechanism determining allergy is an imbalance between Th1 and Th2 response towards Th2. Areas covered: This review describes the mechanisms underlying the natural tolerance to food components and the development of an allergic response in sensitized individuals. Furthermore, therapeutic approaches proposed to manage these abnormal immunologic responses food are also presented and discussed. Expert opinion: In the past, management of food allergies has consisted of the education of patients to avoid the ingestion of the culprit food and to initiate the therapy (e...
October 12, 2016: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/27579860/macrophage-mediated-gliadin-degradation-and-concomitant-il-27-production-drive-il-10-and-ifn-%C3%AE-secreting-tr1-like-cell-differentiation-in-a-murine-model-for-gluten-tolerance
#16
M A van Leeuwen, L M M Costes, L A van Berkel, Y Simons-Oosterhuis, M F du Pré, A E Kozijn, H C Raatgeep, D J Lindenbergh-Kortleve, N van Rooijen, F Koning, J N Samsom
Celiac disease is caused by inflammatory T-cell responses against the insoluble dietary protein gliadin. We have shown that, in humanized mice, oral tolerance to deamidated chymotrypsin-digested gliadin (CT-TG2-gliadin) is driven by tolerogenic interferon (IFN)-γ- and interleukin (IL)-10-secreting type 1 regulatory T-like cells (Tr1-like cells) generated in the spleen but not in the mesenteric lymph nodes. We aimed to uncover the mechanisms underlying gliadin-specific Tr1-like-cell differentiation and hypothesized that proteolytic gliadin degradation by splenic macrophages is a decisive step in this process...
August 31, 2016: Mucosal Immunology
https://www.readbyqxmd.com/read/27553942/telltale-tumor-infiltrating-lymphocytes-til-in-oral-head-neck-cancer
#17
Yu Lei, Yuying Xie, Yee Sun Tan, Mark E Prince, Jeffrey S Moyer, Jacques Nör, Gregory T Wolf
Evidence gleaned from recent studies on the role of tumor-infiltrating lymphocytes (TILs) suggests that cancer is not only a genetic disease but also an immunologic disease. Head and Neck Squamous Cell Carcinoma (HNSCC) has been a significant model to study cancer cell-immune cell interactions. First, immune cell infiltration is an important feature of these tumors. Second, HNSCC frequently develops resistance to immunogenic cytotoxicity, which provides a window to decipher how tumors engage the immune system to establish immune tolerance...
October 2016: Oral Oncology
https://www.readbyqxmd.com/read/27534448/immunomodulation-by-gastrointestinal-carbon-black-nanoparticle-exposure-in-ovalbumin-t-cell-receptor-transgenic-mice
#18
Jason H Fine, Genevieve S Bondy, Laurie Coady, Bevan Pearce, Nikia Ross, Azam F Tayabali, Sabina Halappanavar, Don Caldwell, Ivan Curran, David E Lefebvre
Humans could become exposed to carbon black nanoparticles (CBNPs) in consumer products or an occupational setting. In rodent models, acute respiratory, subcutaneous, and direct immune cell exposure to CBNPs has been shown to enhance allergic sensitization to co-administered ovalbumin (OVA) protein from chicken egg. However, little is known about the effects of ingested CBNPs on immunological responses and oral tolerance to food antigens. We hypothesized that ingestion of CBNPs would enhance the development of food allergy to OVA...
September 9, 2016: Nanotoxicology
https://www.readbyqxmd.com/read/27499704/vitamin-d3-improves-the-effects-of-low-dose-der-p-2-allergoid-treatment-in-der-p-2-sensitized-balb-c-mice
#19
Claudia Petrarca, Emanuela Clemente, Valentina Amato, Alessia Gatta, Sara Cortese, Alessia Lamolinara, Cosmo Rossi, Stefania Zanotta, Gianni Mistrello, Roberto Paganelli, Mario Di Gioacchino
BACKGROUND: Airborne allergens can induce an immunological chronic disease characterized by airway hyper responsiveness and inflammation, mediated by exaggerated Th2 immune response. Allergen-specific immunotherapy (AIT) is effective for treating this condition because it is able to modify its natural course by opposing the underlying pathogenic mechanisms and determining immune suppression, immune deviation and tolerance. The rational for the present study was to investigate the possibility of improving allergoid-based IT in terms of efficacy and safety...
2016: Clinical and Molecular Allergy: CMA
https://www.readbyqxmd.com/read/27492386/microbiota-and-chronic-inflammatory-arthritis-an-interwoven-link
#20
REVIEW
Andrea Picchianti Diamanti, M Manuela Rosado, Bruno Laganà, Raffaele D'Amelio
BACKGROUND: Only recently, the scientific community gained insights on the importance of the intestinal resident flora for the host's health and disease. Gut microbiota in fact plays a crucial role in modulating innate and acquired immune responses and thus interferes with the fragile balance inflammation versus tolerance. MAIN BODY: Correlations between gut bacteria composition and the severity of inflammation have been studied in inflammatory bowel diseases. More recently similar alterations in the gut microbiota have been reported in patients with spondyloarthritis, whereas in rheumatoid arthritis an accumulating body of evidence evokes a pathogenic role for the altered oral microbiota in disease development and course...
August 4, 2016: Journal of Translational Medicine
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