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oral tolerance immunology

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https://www.readbyqxmd.com/read/28859672/safety-and-in-vivo-immune-assessment-of-escalating-doses-of-oral-laquinimod-in-patients-with-rrms
#1
Tjalf Ziemssen, Hayrettin Tumani, Tony Sehr, Katja Thomas, Friedemann Paul, Nils Richter, Emil Samara, Ofer Spiegelstein, Ella Sorani, Oren Bar-Ilan, Dorit Mimrod, Liat Hayardeny
BACKGROUND: Laquinimod is an oral immunomodulator in clinical development to treat relapsing-remitting multiple sclerosis (RRMS). Laquinimod is in clinical development for the treatment of multiple sclerosis and Huntington Disease (HD). The objective of this study is to assess the safety, tolerability, pharmacokinetics (PK) and cytoimmunologic effects following escalating doses of laquinimod in patients with RRMS. METHODS: One hundred twelve patients were randomly assigned to laquinimod/placebo in a series of separate dose-escalating cohorts starting from a daily oral dose of 0...
August 31, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28844318/tolerability-of-the-sq-tree-slit-tablet-in-adults
#2
Anne O Birk, Jens S Andersen, Hanne H Villesen, Maria A Steffensen, Moises A Calderon
PURPOSE: The tree pollen sublingual immunotherapy (SLIT)-tablet (ALK, Denmark) is being developed for the treatment of tree pollen induced allergic rhinitis with or without conjunctivitis. The objective of this Phase I trial was to investigate the tolerability and acceptable dose range of the SQ tree SLIT-tablet in adults with allergic rhinoconjunctivitis. METHODS: The trial was a randomized, double-blind, placebo-controlled, dose escalation Phase I trial that included 70 adults (aged 19-61 years) with birch pollen-induced rhinoconjunctivitis with or without mild to moderate asthma...
August 22, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28774470/history-and-mechanisms-of-oral-tolerance
#3
REVIEW
Rafael M Rezende, Howard L Weiner
Since its first description by Wells and Osbourne in 1911, oral tolerance has intrigued researchers due to its potential for therapeutic applications. Oral tolerance can be defined as an inhibition of specific immune responsiveness to subsequent parenteral injections of proteins to which an individual or animal has been previously exposed via the oral route. Tolerance induction to commensal bacteria and dietary proteins represents the major immunological event taking place in the gut in physiological conditions...
July 31, 2017: Seminars in Immunology
https://www.readbyqxmd.com/read/28757143/methods-in-allergy-immunology-food-challenges
#4
EDITORIAL
Barbara K Ballmer-Weber, Kirsten Beyer
Since there is no in vitro test, which can accurately predict the clinical relevance of a sensitization to food, the oral food challenge still remains the most reliable procedure to confirm or exclude food allergy and to assess the development of tolerance in children with potentially transient food allergies such as to cow's milk, hen's egg, wheat or soy. Although in the last few years component-resolved diagnostic has improved the food allergy diagnostics, especially in peanut and tree nut allergy, the majority of patients still need to undergo oral food challenge...
July 27, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28709944/latex-proteins-from-calotropis-procera-toxicity-and-immunological-tolerance-revisited
#5
Camila F Bezerra, Érika F Mota, Ana Claudia M Silva, Adriana R Tomé, Maria Z R Silva, Daniel de Brito, Camila T M N Porfírio, Ariclécio C Oliveira, José V Lima-Filho, Márcio V Ramos
Many thousands of plants are disseminated worldwide in traditional and folk medicines based on the belief that their leaves, roots, seeds, bark or secretions, when adequately handled, can treat, alleviate or ameliorate numerous disease symptoms. Calotropis procera (Apocynaceae) is a popular medicinal plant and the claims of this shrub's phytomedicinal properties have been scientifically validated. In this study, further prospects towards the in vivo toxicity and oral immunological tolerance of phytomodulatory proteins isolated from the latex of C...
August 25, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28685970/invariant-natural-killer-cells-change-after-an-oral-allergy-desensitization-protocol-for-cow-s-milk
#6
A Cianferoni, R Saltzman, F Saretta, S Barni, E Dudek, M Kelleher, J M Spergel
BACKGROUND: Cow milk (CM) allergy (CMA) affects up to 3% of the paediatric population and recent data suggest that only about 50% will outgrow by age 8. Oral immunotherapy (OIT) is a type of immune-modulating treatment that is able to induce desensitization to food allergens, to increase tolerance threshold, to reduce the risk of anaphylaxis, and to improve the patient's quality of life. The examination of the immunological changes observed during the establishment of food allergy (FA) desensitization in FA patients is a window into the pathogenesis of food allergy and food tolerance development...
July 7, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28649294/randomised-controlled-trial-of-a-baked-egg-intervention-in-young-children-allergic-to-raw-egg-but-not-baked-egg
#7
Merryn Netting, Michael Gold, Patrick Quinn, Adaweyah El-Merhibi, Irmeli Penttila, Maria Makrides
BACKGROUND: Consumption of baked egg by raw egg allergic children is associated with immune changes suggesting development of tolerance. However, causation has not been tested using a double blind randomized controlled trial (RCT). We aimed to compare clinical and immunological outcomes after baked egg (BE) consumption in young BE tolerant egg allergic children. METHODS: In a double blind RCT, BE tolerant egg allergic children consumed 10 g BE (1.3 g protein) 2 to 3 times per week for 6 months (n = 21 intervention group) or similar egg free baked goods (n = 22 control group) while maintaining an otherwise egg free diet...
2017: World Allergy Organization Journal
https://www.readbyqxmd.com/read/28532268/allergen-immunotherapy-in-allergic-rhinitis-current-use-and-future-trends
#8
Ludger Klimek, Oliver Pfaar, Jean Bousquet, Gabriela Senti, Thomas Kündig
Type-1 allergies are among the most chronic common diseases of humans. Allergen immunotherapy (AIT) is the only causative and disease-modifying treatment option besides allergen avoidance. Severe systemic adverse allergic reactions may be induced by every AIT treatment. Different approaches have been used to provide safer AIT preparations to lower or even totally overcome this risk. Areas covered: A structured literature recherche in Medline and Pubmed under inclusion of national and international guidelines and Cochrane meta-analyses has been performed aiming at reviewing clinical use of such approaches in AIT...
September 2017: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/28521318/breastfeeding-childhood-asthma-and-allergic-disease
#9
Wendy H Oddy
The worldwide prevalence of childhood asthma has been increasing considerably, and the protection afforded by breastfeeding in its development has been the subject of controversy for more than 80 years. Previous systematic reviews have generally found a protective effect of breastfeeding on allergic outcomes, although many studies have methodological limitations. Although breastfeeding is protective against lower respiratory tract infection during infancy, such protection has not been demonstrated for asthma in all studies...
2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28499411/paraneoplastic-acral-vascular-syndrome-in-a-patient-with-metastatic-melanoma-under-immune-checkpoint-blockade
#10
Thilo Gambichler, Stefanie Strutzmann, Andrea Tannapfel, Laura Susok
BACKGROUND: Paraneoplastic acral vascular syndrome (PAVS) is a rare phenomenon which is observed in patients with adenocarcinomas and other malignancies. Various potential pathogenic mechanisms such as tumour invasion of sympathetic nerves, hyperviscosity, hypercoagulability, vasoactive tumour-secreted substances, and immunological mechanisms have been suggested. CASE PRESENTATION: We report a 60-year-old Caucasian male attended our hospital with a bulky lymph node mass in the right axilla...
May 12, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28479335/allergen-specific-igg-antibodies-signaling-via-fc%C3%AE-riib-promote-food-tolerance
#11
Oliver T Burton, Jaciel M Tamayo, Amanda J Stranks, Kyle J Koleoglou, Hans C Oettgen
BACKGROUND: Food-allergic subjects produce high-titer IgE antibodies that bind to mast cells via FcεRI and trigger immediate hypersensitivity reactions upon antigen encounter. Food-specific IgG antibodies arise in the setting of naturally resolving food allergy and accompany the acquisition of food allergen unresponsiveness in oral immunotherapy (OIT). OBJECTIVE: In this study, we sought to delineate the effects of IgG and its inhibitory Fc receptor, FcγRIIb, on both de novo allergen sensitization in naïve animals and on established immune responses in the setting of pre-existing food allergy...
May 4, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28439004/endocannabinoid-system-acts-as-a-regulator-of-immune-homeostasis-in-the-gut
#12
Nandini Acharya, Sasi Penukonda, Tatiana Shcheglova, Adam T Hagymasi, Sreyashi Basu, Pramod K Srivastava
Endogenous cannabinoids (endocannabinoids) are small molecules biosynthesized from membrane glycerophospholipid. Anandamide (AEA) is an endogenous intestinal cannabinoid that controls appetite and energy balance by engagement of the enteric nervous system through cannabinoid receptors. Here, we uncover a role for AEA and its receptor, cannabinoid receptor 2 (CB2), in the regulation of immune tolerance in the gut and the pancreas. This work demonstrates a major immunological role for an endocannabinoid. The pungent molecule capsaicin (CP) has a similar effect as AEA; however, CP acts by engagement of the vanilloid receptor TRPV1, causing local production of AEA, which acts through CB2...
May 9, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28397379/b-fahf-2-plus-oral-immunotherapy-oit-is-safer-and-more-effective-than-oit-alone-in-a-murine-model-of-concurrent-peanut-tree-nut-allergy
#13
K D Srivastava, Y Song, N Yang, C Liu, I E Goldberg, A Nowak-Węgrzyn, H A Sampson, X-M Li
BACKGROUND: Concurrent sensitization to peanut (PN) and tree nuts (TN), the most dangerous food allergies, is common. Current oral immunotherapy (OIT) is not fully satisfactory. OBJECTIVE: To determine whether the herbal formula B-FAHF-2 (BF2) ameliorates PN/TN OIT adverse reactions and enhances persistence of a tolerant state. METHODS: Concurrently sensitized PN-, walnut- (WN) and cashew (CSH)-allergic mice received 1-day PN/WN/CSH rush OIT plus 3 weeks of maintenance dosing, with or without 3 weeks prior and 3 weeks BF2 co-treatment...
August 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28391953/-efficacy-of-the-treatment-and-secondary-antifungal-prophylaxis-in-aids-related-histoplasmosis-experience-at-the-francisco-j-mu%C3%A3-iz-infectious-diseases-hospital-in-buenos-aires
#14
Ricardo Negroni, Fernando Messina, Alicia Arechavala, Gabriela Santiso, Mario Bianchi
BACKGROUND: Classic histoplasmosis is a systemic endemic mycosis due to Histoplasma capsulatum var. capsulatum. A significant reduction in the morbidity and mortality of AIDS-related histoplasmosis has been observed since the introduction of highly active antiretroviral therapy (HAART) and secondary antifungal prophylaxis. AIMS: The aim of this study was to determine the current state of prognosis and treatment response of HIV-positive patients with histoplasmosis in the Francisco J...
April 5, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28326980/gene-sequence-analyses-of-the-healthy-oral-microbiome-in-humans-and-companion-animals
#15
Eric M Davis
It has long been accepted that certain oral bacterial species are responsible for the development of periodontal disease. However, the focus of microbial and immunological research is shifting from studying the organisms associated with disease to examining the indigenous microbial inhabitants that are present in health. Microbiome refers to the aggregate genetic material of all microorganisms living in, or on, a defined habitat. Recent developments in gene sequence analysis have enabled detection and identification of bacteria from polymicrobial samples, including subgingival plaque...
June 2016: Journal of Veterinary Dentistry
https://www.readbyqxmd.com/read/28326908/sublingual-immunotherapy-tablets-as-a-disease-modifying-add-on-treatment-option-to-pharmacotherapy-for-allergic-rhinitis-and-asthma
#16
REVIEW
Stephen Brunton, Harold S Nelson, David I Bernstein, Simon Lawton, Susan Lu, Hendrik Nolte
Allergic rhinitis (AR) with or without conjunctivitis (AR/C) is associated with a significant health and economic burden, and is often accompanied by asthma. Pharmacotherapies are the mainstay treatment options for AR and asthma, but guidelines also recommend allergy immunotherapy (AIT). Unlike pharmacotherapies, AIT has the ability to modify the underlying immunologic mechanisms of AR and asthma with the potential for long-term benefits after treatment is discontinued. Immunotherapy may also prevent progression of AR/C to asthma...
August 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/28295241/indirect-effects-of-immunological-tolerance-to-a-regular-dietary-protein-reduce-cutaneous-scar-formation
#17
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 through 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...
July 2017: Immunology
https://www.readbyqxmd.com/read/28270799/participation-of-leukotrienes-in-the-immune-modulation-of-oral-tolerance
#18
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
#19
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
#20
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...
May 2017: Acta Paediatrica
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