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Peanut immunotherapy

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https://www.readbyqxmd.com/read/29136445/effect-of-varying-doses-of-epicutaneous-immunotherapy-vs-placebo-on-reaction-to-peanut-protein-exposure-among-patients-with-peanut-sensitivity-a-randomized-clinical-trial
#1
Hugh A Sampson, Wayne G Shreffler, William H Yang, Gordon L Sussman, Terri F Brown-Whitehorn, Kari C Nadeau, Amarjit S Cheema, Stephanie A Leonard, Jacqueline A Pongracic, Christine Sauvage-Delebarre, Amal H Assa'ad, Frederic de Blay, J Andrew Bird, Stephen A Tilles, Franck Boralevi, Thierry Bourrier, Jacques Hébert, Todd D Green, Roy Gerth van Wijk, André C Knulst, Gisèle Kanny, Lynda C Schneider, Marek L Kowalski, Christophe Dupont
Importance: Epicutaneous immunotherapy may have potential for treating peanut allergy but has been assessed only in preclinical and early human trials. Objective: To determine the optimal dose, adverse events (AEs), and efficacy of a peanut patch for peanut allergy treatment. Design, Setting, and Participants: Phase 2b double-blind, placebo-controlled, dose-ranging trial of a peanut patch in peanut-allergic patients (6-55 years) from 22 centers, with a 2-year, open-label extension (July 31, 2012-July 31, 2014; extension completed September 29, 2016)...
November 14, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29130802/oral-immunotherapy-using-polymeric-nanoparticles-loaded-with-peanut-proteins-in-a-murine-model-of-fatal-anaphylaxis
#2
Carlos Gamazo, Maddi García-Azpíroz, Juliana De Souza Rebouças, Gabriel Gastaminza, Marta Ferrer, Juan M Irache
BACKGROUND: Peanut allergy is the most common cause of anaphylaxis and food-related death. However, there is currently no approved immunotherapy treatment. Hence, this warrants the need for relevant and convenient animal models to test for adequate immunotherapies. MATERIALS & METHODS: In this study, we compared three mouse strains: CD1, BALB/c and C57, to select a model of peanut allergy. After that, we conducted then a therapeutic study using an immunogenic peanut extract encapsulated in nanoparticles made with polymer Gantrez(®) following the solvent displacement method...
November 2017: Immunotherapy
https://www.readbyqxmd.com/read/29120805/characterization-of-narrow-leaf-lupin-lupinus-angustifolius-l-recombinant-major-allergen-ige-binding-proteins-and-the-natural-%C3%AE-conglutin-counterparts-in-sweet-lupin-seed-species
#3
Jose C Jimenez-Lopez, Rhonda C Foley, Ella Brear, Victoria C Clarke, Elena Lima-Cabello, Jose F Florido, Karam B Singh, Juan D Alché, Penelope M C Smith
β-conglutin has been identified as a major allergen for Lupinus angustifolius seeds. The aim of this study was to evaluate the binding of IgE to five recombinant β-conglutin isoforms (rβ) that we overexpressed and purified and to their natural counterparts in different lupin species and cultivars. Western blotting suggested β-conglutins were the main proteins responsible for the IgE reactivity of the lupin species and cultivars. Newly identified polypeptides from "sweet lupin" may constitute a potential new source of primary or cross-reactive sensitization to lupin, particularly to L...
April 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29092786/efficacy-and-safety-of-ar101-in-oral-immunotherapy-for-peanut-allergy-results-of-arc001-a-randomized-double-blind-placebo-controlled-phase-2-clinical-trial
#4
J Andrew Bird, Jonathan M Spergel, Stacie M Jones, Rima Rachid, Amal H Assa'ad, Julie Wang, Stephanie A Leonard, Susan S Laubach, Edwin H Kim, Brian P Vickery, Benjamin P Davis, Jennifer Heimall, Antonella Cianferoni, Andrew J MacGinnitie, Elena Crestani, A Wesley Burks
BACKGROUND: Peanut oral immunotherapy, using a variety of approaches, has been previously shown to induce desensitization in peanut-allergic subjects, but no products have been approved for clinical use by regulatory agencies. OBJECTIVE: We performed the first phase 2 multicentered study to assess the safety and efficacy of AR101, a novel oral biologic drug product. METHODS: A randomized, double-blind, placebo-controlled trial was conducted at 8 US centers...
October 30, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29081025/the-current-state-of-epicutaneous-immunotherapy-for-food-allergy-a-comprehensive-review
#5
REVIEW
Bruce J Lanser, Donald Y M Leung
The food allergy epidemic of recent years has led to the search for safe and effective methods of immunotherapy for foods. Studies of epicutaneous immunotherapy (EPIT) in mice have shown promising safety and efficacy data. Murine models have also identified probable mechanisms for the development of tolerance to food allergens, including the induction of regulatory T cells. Clinical data is lacking, but relatively small and early studies among peanut and cow's milk allergic subjects suggest that EPIT has an excellent safety profile, particularly compared to other methods of specific allergen immunotherapy...
October 28, 2017: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/29052245/the-longitudinal-impact-of-probiotic-and-peanut-oral-immunotherapy-ppoit-on-health-related-quality-of-life-hrql
#6
Audrey Dunn Galvin, Suzanne McMahon, Anne-Louise Ponsonby, Kuang-Chih Hsiao, Mimi L K Tang
BACKGROUND: We previously reported that Probiotic and Peanut Oral Immunotherapy (PPOIT) was effective at inducing sustained unresponsiveness compared with placebo in a double-blind, placebo-controlled randomized trial. This study evaluated the impact of PPOIT on health related quality of life (HRQL). METHOD: Fifty-one participants (PPOIT 24; Placebo 27) from the PPOIT trial completed Food Allergy Quality of Life Questionnaire (FAQLQ-PF) and Food Allergy Independent Measure (FAIM) at pre-treatment, end-of-treatment and 3-months after end-of-treatment...
October 20, 2017: Allergy
https://www.readbyqxmd.com/read/29021893/the-efficacy-of-oral-and-subcutaneous-antigen-specific-immunotherapy-in-murine-cow-s-milk-and-peanut-allergy-models
#7
Marlotte M Vonk, Laura Wagenaar, Raymond H H Pieters, Leon M J Knippels, Linette E M Willemsen, Joost J Smit, Betty C A M van Esch, Johan Garssen
BACKGROUND: Antigen-specific immunotherapy (AIT) is a promising therapeutic approach for both cow's milk allergy (CMA) and peanut allergy (PNA), but needs optimization in terms of efficacy and safety. AIM: Compare oral immunotherapy (OIT) and subcutaneous immunotherapy (SCIT) in murine models for CMA and PNA and determine the dose of allergen needed to effectively modify parameters of allergy. METHODS: Female C3H/HeOuJ mice were sensitized intragastrically (i...
2017: Clinical and Translational Allergy
https://www.readbyqxmd.com/read/28988815/advancements-and-dilemmas-in-the-management-of-allergy
#8
REVIEW
James W Mims
Recent advances in the diagnosis and management of allergic disease also lead to new clinical decisions for providers. Advances in component (or molecular) diagnostic testing for allergy continue to build in the literature, but diagnosing inhalant allergy remains largely unchanged clinically. Prevention of allergy has been demonstrated by preventing peanut allergy in high-risk infants by intentional oral exposure to promote tolerance. Immunotherapy options have increased, with literature supporting sublingual drops, sublingual tablets, and subcutaneous immunotherapy...
December 2017: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/28965967/evaluation-of-nanoparticles-as-oral-vehicles-for-immunotherapy-against-experimental-peanut-allergy
#9
Ana Brotons-Canto, Carlos Gamazo, Nekane Martín-Arbella, Muthanna Abdulkarim, Jose Matías, Mark Gumbleton, Juan M Irache
The aim of this work was to evaluate the potential application of an original oral immunotherapy, based on the use of nanoparticles, against an experimentally induced peanut allergy. In this context, a roasted peanut extract, containing the main allergenic proteins, were encapsulated into poly(anhydride) nanoparticles. The resulting devices (PE-NP) displayed a mean size of about 150nm and a significantly lower surface hydrophobicity than empty nanoparticles (NP). This low hydrophobicity correlated well with a higher in vitro diffusion in pig intestinal mucus than NP and an important in vivo capability to reach the intestinal epithelium and Peyer's patches...
September 28, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28960628/treatment-of-gastric-eosinophilia-by-epicutaneous-immunotherapy-in-piglets-sensitized-to-peanuts
#10
L Mondoulet, N Kalach, V Dhelft, T Larcher, C Delayre-Orthez, P H Benhamou, J Spergel, H A Sampson, C Dupont
BACKGROUND: Eosinophilic Gastrointestinal Disorders (EGIDs) are hypersensitivity disorders frequently triggered by food allergy and manifested by mucosal eosinophilic infiltration at any level of the gastro-intestinal tract. This study established a model of gastric eosinophilia in peanut-sensitized piglets to evaluate the efficacy of epicutaneous immunotherapy (EPIT) for its treatment. METHODS: Experiments were carried out in piglets first sensitized by 3 intra-peritoneal injections of peanut protein extract (PPE) with adjuvant, and then given PPE orally for 10 days, a sequence leading to gastric eosinophilia assessed by endoscopy...
September 28, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28939635/peanut-immunotherapy-still-working-after-four-years
#11
(no author information available yet)
No abstract text is available yet for this article.
November 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28865877/oral-immunotherapy-for-food-allergy
#12
REVIEW
Deborah M Hussey Freeland, Monali Manohar, Sandra Andorf, Benjamin D Hobson, Wenming Zhang, Kari C Nadeau
Food allergy is a pathological, potentially deadly cascade of immune responses to molecules or molecular fragments that are normally innocuous when encountered in foods, such as milk, egg, or peanut. As the incidence and prevalence of food allergy rise, the standard of care is poised to advance beyond food allergen avoidance coupled with injectable epinephrine treatment of allergen-induced systemic reactions. Recent studies provide evidence that oral immunotherapy may effectively redirect the atopic immune responses of food allergy patients as they ingest small but gradually increasing allergen doses over many months, eliciting safer immune responses to these antigens...
April 2017: Seminars in Immunology
https://www.readbyqxmd.com/read/28842925/polyphenol-rich-pomegranate-juice-reduces-ige-binding-to-cashew-nut-allergens
#13
Yichen Li, Christopher P Mattison
BACKGROUND: Food allergy negatively impacts quality of life and can be life-threatening. Cashew nuts can cause severe reactions in very small amounts, and they are included in a group of foods most commonly responsible for causing food allergy. Polyphenols and polyphenol rich juices have been demonstrated to complex with peanut allergens. Here, the interaction between cashew nut allergens and polyphenol rich juices is evaluated biochemically and immunologically. RESULTS: Various juices, including pomegranate (POM), blueberry (BB), and concord grape (CG) juices, were evaluated for polyphenol content and formation of polyphenol-cashew allergen complexes...
August 26, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28821489/peanut-immunotherapy-provides-long-lasting-suppression-of-allergy-finds-study
#14
Susan Mayor
No abstract text is available yet for this article.
August 18, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28742538/anaphylaxis-and-intimate-behaviour
#15
Gennaro Liccardi, Marco Caminati, Gian Enrico Senna, Luigino Calzetta, Paola Rogliani
PURPOSE OF REVIEW: Intimate behaviours may represent an unusual way of exposure to a culprit allergen, or the frame for sex-related allergies due to triggers typically linked to that situation. The present review aims at summarizing the state of the art about the topic, in order to spread the awareness and the basic know-how in the field of sexual-related allergies. RECENT FINDINGS: Kiss-related IgE-mediated reactions are caused in sensitized partners mainly by the passive transport of allergenic molecules through saliva, skin or oral mucosa...
July 22, 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28719388/what-is-new-in-managing-patients-with-food-allergy-almost-everything
#16
Brian Schroer, Jaclyn Bjelac, Mandy Leonard
PURPOSE OF REVIEW: This review aims to describe current concepts in managing patients with food allergy. There have been many recent advances in the management of patients with IgE-mediated reactions to food, including diagnosis, prevention, management, and ongoing research in the field. Food allergy is increasing in prevalence and may be life threatening. This review aims to highlight changes in recommended practice when diagnosing and managing patients with food allergy. RECENT FINDINGS: Early introduction of highly allergenic foods, particularly peanut, has been shown to decrease the risk for development of food allergy in patients who are at elevated risk...
October 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28709968/specific-allergen-profiles-of-peanut-foods-and-of-diagnostic-or-therapeutic-allergenic-products
#17
Stephanie Filep, Denise Block, Bryan R E Smith, Eva M King, Scott Commins, Michael Kulis, Brian P Vickery, Martin D Chapman
RATIONALE: 'Generic' immunoassays for peanut cannot discriminate between allergen levels in peanut derived food products or therapeutics. Clinical trials of oral immunotherapy are strengthened by using standardized peanut preparations, with defined doses of major allergens. OBJECTIVE: This paper describes measurement of Ara h 1, Ara h 2 and Ara h 6 in peanut foods and in peanut flour extracts used for allergy diagnosis and oral immunotherapy. METHODS: Monoclonal antibody-based enzyme immunoassays for Ara h 1, Ara h 2 and Ara h 6 were used to compare allergen levels in peanut (n=19) and tree nut (n=16) butter, peanut flour (n=11); oils (n=8); extracts used for diagnosis and oral immunotherapy (n=5); and the National Institute for Standards and Technology Peanut Butter Standard Reference Material® 2387...
July 11, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28689791/peanut-specific-tr1-cells-induced-in-vitro-from-allergic-individuals-are-functionally-impaired
#18
Laurence Pellerin, Jennifer Anne Jenks, Sharon Chinthrajah, Tina Dominguez, Whitney Block, Xiaoying Zhou, Arram Noshirvan, Silvia Gregori, Maria Grazia Roncarolo, Kari Christine Nadeau, Rosa Bacchetta
BACKGROUND: Peanut allergy is a life threatening condition which lacks regulatory-approved treatment. T regulatory type 1 (Tr1) cells are potent suppressors of immune responses and can be induced in vivo upon repeated antigen exposure or in vitro using tolerogenic dendritic cells (DC-10). Whether or not oral immunotherapy (OIT) leads to antigen-specific Tr1 cell induction has not been established. OBJECTIVES: To determine whether peanut-specific Tr1 cells can be generated in vitro from peripheral blood of peanut allergic (PA) individuals at baseline or during OIT, and whether they are functional as compared to peanut-specific Tr1 cells induced from healthy controls (HC)...
July 6, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28669889/quantitative-assessment-of-the-safety-benefits-associated-with-increasing-clinical-peanut-thresholds-through-immunotherapy
#19
Joseph L Baumert, Steve L Taylor, Stef J Koppelman
BACKGROUND: Peanut immunotherapy studies are conducted with the aim to decrease the sensitivity of patients to peanut exposure with the outcome evaluated by testing the threshold for allergic response in a double-blind placebo-controlled food challenge. The clinical relevance of increasing this threshold is not well characterized. OBJECTIVE: We aimed to quantify the clinical benefit of an increased threshold for peanut-allergic patients. METHODS: Quantitative risk assessment was performed by matching modeled exposure to peanut protein with individual threshold levels...
June 29, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28618453/data-driven-programmatic-approach-to-analysis-of-basophil-activation-tests
#20
Sarita U Patil, Agustin Calatroni, Michael Schneider, Johanna Steinbrecher, Neal Smith, Cecilia Washburn, Alex Ma, Wayne G Shreffler
BACKGROUND: Conventional data analysis of flow cytometry-based basophil activation testing requires repetitive, labor-intensive analysis that hampers efforts to standardize testing for clinical applications. Using an open-source platform, we developed and implemented a programmatic approach to the analysis of the basophil activation test (BAT) by flow cytometry. METHODS: Using the BÜHLMANN FlowCAST® assay, peripheral blood from peanut allergic patients undergoing oral immunotherapy was incubated with peanut allergens (Arah1, Arah2, Arah6, whole peanut extract) and stained with fluorescent antibodies to CCR3 and CD63 for the development of a data-driven programmatic analysis using Bioconductor and R...
June 15, 2017: Cytometry. Part B, Clinical Cytometry
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