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Peanut Allergy

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https://www.readbyqxmd.com/read/28342912/peanut-oleosins-associated-with-severe-peanut-allergy-importance-of-lipophilic-allergens-for-comprehensive-allergy-diagnostics
#1
Christian Schwager, Skadi Kull, Jochen Behrends, Niels Röckendorf, Frauke Schocker, Andreas Frey, Arne Homann, Wolf-Meinhard Becker, Uta Jappe
BACKGROUND: Peanut allergy is one of the most common and most severe food allergies in Western countries and its accurate diagnosis to prevent potential life-threatening allergic reactions is crucial. However, aqueous extracts used for routine diagnostic measurements are devoid of lipophilic allergens such as oleosins. We have recently succeeded in the isolation and purification of these unique proteins, and the current study evaluates their allergenic potential and clinical relevance...
March 22, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28333730/peanut-allergy-prevention-starts-in-infancy
#2
Carol Potera
An addendum to the 2010 guidelines includes strategies based on current research findings.
April 2017: American Journal of Nursing
https://www.readbyqxmd.com/read/28330689/evaluation-of-methohexital-as-an-alternative-to-propofol-in-a-high-volume-outpatient-pediatric-sedation-service
#3
Nicholas E Jones, Michael S Kelleman, Harold K Simon, Jana A Stockwell, Courtney McCracken, Michael D Mallory, Pradip P Kamat
BACKGROUND: Propofol is a preferred agent for many pediatric sedation providers because of its rapid onset and short duration of action. It allows for quick turn around times and enhanced throughput. Occasionally, intravenous (IV) methohexital (MHX), an ultra-short acting barbiturate is utilized instead of propofol. OBJECTIVE: Describe the experience with MHX in a primarily propofol driven outpatient sedation program and to see if it serves as an acceptable alternative when propofol is not the preferred pharmacologic option...
March 8, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28315886/update-on-timing-and-source-of-allergenic-foods
#4
Debra J Palmer
As the prevalence of food allergies in many communities continues to rise, the question of when in infancy to introduce any solid foods, or specific 'more allergenic' foods, as a food allergy prevention strategy has been debated. Observational studies have found that introducing any solid foods prior to 4 months of age was associated with an increased risk of allergic disease. Hence, the current allergy prevention consensus recommendation is that the introduction of any solid foods should commence after 4 months of age...
2017: Nestlé Nutrition Institute Workshop Series
https://www.readbyqxmd.com/read/28304196/a-limited-survey-of-dark-chocolate-bars-obtained-in-the-united-states-for-undeclared-milk-and-peanut-allergens
#5
Binaifer Bedford, Ye Yu, Xue Wang, Eric A E Garber, Lauren S Jackson
Undeclared allergens in chocolate products have been responsible for numerous allergen-related recalls in the United States. A survey was conducted to determine the prevalence of undeclared milk and peanut in 88 and 78 dark chocolate bars, respectively. Concentrations of milk (as nonfat dry milk) or peanut in three samples of each chocolate product were determined with two milk- or peanut-specific enzyme-linked immunosorbent assay kits. In 75% of the chocolate bar products with a milk advisory statement, milk concentrations were above the limit of quantitation (2...
March 17, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28294257/protein-bound-vaccinium-fruit-polyphenols-decrease-ige-binding-to-peanut-allergens-and-rbl-2h3-mast-cell-degranulation-in-vitro
#6
Nathalie J Plundrich, Rishipal R Bansode, E Allen Foegeding, Leonard L Williams, Mary Ann Lila
Peanut allergy is a worldwide health concern. In this study, the natural binding properties of plant-derived polyphenols to proteins was leveraged to produce stable protein-polyphenol complexes comprised of peanut proteins and cranberry (Vaccinium macrocarpon Ait.) or lowbush blueberry (Vaccinium angustifolium Ait.) pomace polyphenols. Protein-bound and free polyphenols were characterized and quantified by multistep extraction of polyphenols from protein-polyphenol complexes. Immunoblotting was performed with peanut-allergic plasma to determine peanut protein-specific IgE binding to unmodified peanut protein, or to peanut protein-polyphenol complexes...
March 15, 2017: Food & Function
https://www.readbyqxmd.com/read/28283159/food-challenge-and-community-reported-reaction-profiles-in-food-allergic-children-aged-1-and-4-years-a-population-based-study
#7
Joshua C K Chan, Rachel L Peters, Jennifer J Koplin, Shyamali C Dharmage, Lyle C Gurrin, Melissa Wake, Mimi L K Tang, Susan Prescott, Katrina J Allen
BACKGROUND: Oral food challenge is the main tool for diagnosing food allergy, but there is little data on the reaction profiles of young children undergoing challenges, nor how these reactions compare to reactions on accidental ingestion in the community. OBJECTIVES: To compare reaction profiles from food challenges and parent-reported reactions on accidental ingestion, and assess predictors of severe reactions. METHODS: HealthNuts is a longitudinal population-based cohort study of 5276 1-year-old infants...
March 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28283151/immunotherapy-for-food-allergy-are-we-there-yet
#8
Yael Gernez, Anna Nowak-Węgrzyn
Current clinical research focuses on food allergen-specific immunotherapy through oral (OIT), sublingual (SLIT), or epicutaneous (EPIT) routes. Immunotherapy relies on the delivery of gradually increasing doses of specific allergens to induce desensitization (defined as temporary antigen hyporesponsiveness that depends on regular food ingestion) and, ultimately, tolerance (defined as the ability to ingest food without symptoms despite prolonged periods of avoidance or irregular intake). Although the majority of the patients treated with OIT achieve desensitization, only a minority achieves tolerance...
March 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28277274/therapeutic-reversal-of-food-allergen-sensitivity-by-mature-retinoic-acid-differentiated-dendritic-cell-induction-of-lag3-cd49b-foxp3-regulatory-t%C3%A2-cells
#9
Wojciech Dawicki, Chunyan Li, Jennifer Town, Xiaobei Zhang, John R Gordon
BACKGROUND: Anaphylaxis is a life-threatening condition for which we have limited therapeutic options. Although specific immunotherapy for food allergies is becoming more effective, it is still laborious and carries substantial risk of adverse events. On the other hand, regulatory dendritic cell (DC) therapy is effective in mouse models of allergic disease and has been shown to work with TH2 cells from atopic asthmatic patients. OBJECTIVE: We assessed whether DC immunotherapy could reverse food allergen sensitivity in mouse models to provide proof of concept relating to their use in the clinic...
October 20, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28276109/life-after-leap-how-to-implement-advice-on-introducing-peanuts-in-early-infancy
#10
REVIEW
David M Fleischer
The increase in food allergies worldwide has led to mounting concern among healthcare providers, families, schools, and the food industry. Of particular interest is the growing prevalence of peanut allergy. The Learning Early About Peanut Allergy (LEAP) study confirms that the early introduction of peanut significantly decreases the risk of developing peanut allergy among high-risk children. However, a number of issues, such as a unified definition of high risk and whether or not to screen patients before peanut introduction, remain...
March 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28268214/identifying-epithelial-endocytotic-mechanisms-of-the-peanut-allergens-ara-h-1-and-ara-h-2
#11
Dwan Price, M Leigh Ackland, Cenk Suphioglu
BACKGROUND: Peanuts are still one of the highest contributors to anaphylactic deaths after ingestion of a food allergen. At the molecular level, interactions between peanut allergens and the intestinal epithelium are largely unexplored. Previous findings by our research group demonstrated that the major peanut allergens, i.e., Ara h 1, Ara h 2, Ara h 3, and Ara h 6, were able to cross the Caco-2 human cell culture model of the intestinal epithelium. This research broadened our investigation to identify the mechanisms by which the Caco-2 monolayers uptake peanut allergens, specifically by endocytosis...
March 8, 2017: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/28266703/changes-to-infant-feeding-guidelines-relevance-to-dermatologists
#12
REVIEW
Celestine C Wong, Katrina J Allen, David Orchard
The newly revised Australian Infant Feeding Guidelines recommends that all infants, including those at high risk of allergy, be introduced foods traditionally considered allergenic (such as peanut butter, dairy, wheat and egg) within the first year of life. High-risk infants are those with early onset eczema (<3-months old) or with moderate to severe eczema not responding to treatment (<6-months old). Eczema can also represent a symptom of allergy presentation and the recommended introduction of some foods in this group may lead to allergic reactions at home...
March 7, 2017: Australasian Journal of Dermatology
https://www.readbyqxmd.com/read/28244622/perioperative-considerations-for-the-food-allergic-pediatric-patient
#13
REVIEW
Patrick G Fernandez, Marco Mikhael
Patients with a history of food allergy and food intolerance are common in the pediatric population and are encountered frequently in the perioperative setting by pediatric anesthesiologists. Perioperatively, food allergy can present on a spectrum ranging from minor acute urticaria to more severe hypovolemia and anaphylactic shock. Allergy to foods including fruits, fish, egg, soy, and peanut are most concerning for their potential to cross-react with perioperative medications. There is little in the anesthesia literature that focuses on the perioperative management of children with food allergies...
February 28, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28238744/peanut-allergen-threshold-study-pats-novel-single-dose-oral-food-challenge-study-to-validate-eliciting-doses-in-peanut-allergic-children
#14
Jonathan O'B Hourihane, Katrina J Allen, Wayne G Shreffler, Gillian Dunngalvin, Julie A Nordlee, Giovanni A Zurzolo, Audrey DunnGalvin, Lyle C Gurrin, Joseph L Baumert, Steve L Taylor
BACKGROUND: Eliciting doses (ED) of allergenic foods can be defined by the distribution of threshold doses for individuals within a specific population. ED05 is the dose that elicits a reaction in 5% of allergic subjects. The predicted ED05 for peanut (PN) is 1.5 mg of peanut protein (6 mg whole peanut). OBJECTIVE: We sought to validate the predicted peanut ED05 (1.5 mg) with a novel single dose challenge. METHODS: Consecutive eligible peanut allergic children in 3 centres were prospectively invited to participate, irrespective of previous reaction severity...
February 24, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28226324/a-survey-of-self-reported-food-allergy-and-food-related-anaphylaxis-among-young-adult-students-at-kuwait-university-kuwait
#15
Fatima Ali
OBJECTIVES: To conduct a survey on self-reported food allergy to milk, egg, peanuts, tree nuts, fish, shellfish, wheat and sesame as well as reported food-related anaphylaxis and epinephrine prescription practices among Kuwaiti students attending Kuwait University. SUBJECTS AND METHODS: One thousand (1,000) questionnaires that included data on age, gender, presence of food allergies and associated details were distributed. All participants reporting an allergy were categorized as having a perceived food allergy...
February 22, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/28226319/oral-and-sublingual-immunotherapy-potential-causes-for-eosinophilic-gastrointestinal-disorders
#16
Delara Babaie, Mehrnaz Mesdaghi, Makoto Nishino, Mahboubeh Mansouri, Motohiro Ebisawa
Food allergy is a common health problem worldwide, with increasing prevalence during recent decades. The only approved treatments for food allergy are food avoidance and administration of emergency medications in case of accidental exposure, which negatively affects patients' quality of life, so new treatments are highly desirable. Different food immunotherapy modalities have recently been used, with variable success rates in the induction of desensitization and tolerance, and different numbers and types of adverse reactions...
February 23, 2017: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/28216433/lifelong-memory-responses-perpetuate-humoral-th2-immunity-and-anaphylaxis-in-food-allergy
#17
Rodrigo Jiménez-Saiz, Derek K Chu, Talveer S Mandur, Tina D Walker, Melissa E Gordon, Roopali Chaudhary, Joshua Koenig, Sarah Saliba, Heather J Galipeau, Adam Utley, Irah L King, Kelvin Lee, Rachel Ettinger, Susan Waserman, Roland Kolbeck, Manel Jordana
BACKGROUND: A number of food allergies (e.g. fish, shellfish, nuts) are lifelong, without any disease-transforming therapies and unclear in their underlying immunology. Clinical manifestations of food allergy are largely mediated by IgE. Although persistent IgE titres have conventionally been attributed to long-lived IgE(+) plasma cells (PCs), this has not been directly and comprehensively tested. OBJECTIVE: To evaluate mechanisms underlying persistent IgE and allergic responses to food allergens...
February 16, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28212503/lactobacillus-buchneri-s-layer-as-carrier-for-an-ara-h-2-derived-peptide-for-peanut-allergen-specific-immunotherapy
#18
Julia Anzengruber, Merima Bublin, Eva Bönisch, Bettina Janesch, Angelika Tscheppe, Matthias L Braun, Eva-Maria Varga, Christine Hafner, Heimo Breiteneder, Christina Schäffer
Peanut allergy is an IgE-mediated severe hypersensitivity disorder. The lack of a treatment of this potentially fatal allergy has led to intensive research on vaccine development. Here, we describe the design and initial characterization of a carrier-bound peptide derived from the most potent peanut allergen, Ara h 2, as a candidate vaccine. Based on the adjuvant capability of bacterial surface (S-) layers, a fusion protein of the S-layer protein SlpB from Lactobacillus buchneri CD034 and the Ara h 2-derived peptide AH3a42 was produced...
February 14, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28208101/berberine-as-a-chemical-and-pharmacokinetic-marker-of-the-butanol-extracted-food-allergy-herbal-formula-2
#19
Nan Yang, Kamal Srivastava, Ying Song, Changda Liu, Sool Cho, Yujuan Chen, Xiu-Min Li
RATIONALE: Food Allergy Herbal Formula 2 (FAHF-2) provided protection against peanut anaphylaxis in a murine model and induced beneficial immune-modulation in humans. Butanol-refined FAHF-2, B-FAHF-2, retained safety and efficacy in the peanut allergic murine model at only 1/5 of FAHF-2 dosage. One compound, berberine, was isolated and identified in vitro as a bioactive component present in FAHF-2 and B-FAHF-2. The aim of this study was to investigate berberine as a chemical and pharmacokinetic marker of B-FAHF-2...
February 13, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28201853/antigenic-cross-reactivity-between-schistosoma-mansoni-and-peanut-a-role-for-cross-reactive-carbohydrate-determinants-ccds-and-implications-for-the-hygiene-hypothesis
#20
Joseph E Igetei, Marwa El-Faham, Susan Liddell, Michael J Doenhoff
The antigenic reactivity of constituents of Schistosoma mansoni and peanut (Arachis hypogaea) was investigated to determine whether identical antigenic epitopes possessed by both organisms provided a possible explanation for the negative correlation between chronic schistosome infection and atopy to allergens. Aqueous extracts of peanuts were probed in Western immunoblots with rabbit IgG antibodies raised against the egg, cercarial and adult worm stages of S. mansoni. Several molecules in the peanut extract were antigenically reactive with antibodies from the various rabbit anti-schistosome sera...
April 2017: Immunology
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