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Enhancing the Safety and Efficacy of Food Allergy Immunotherapy: a Review of Adjunctive Therapies.

Abstract：

:Food allergy is a potentially life-threatening condition with no approved curative therapy. A number of food allergen immunotherapies are being investigated in phase II/III trials; however, these are limited in their ability to restore immune tolerance to food allergens and often result in high rates of allergic side effects, sometimes involving anaphylaxis, that may curtail their impact. A variety of adjunctive therapies have been developed in order to enhance the efficacy and/or improve the safety of food allergen immunotherapy through either shifting the immune response from a Th2 polarized response to a Th1 and regulatory T cell dominated response or by blocking downstream effects of the allergic inflammatory response by targeting IgE or mast cell mediators. Upstream therapies that shift towards a Th1/Treg response include toll-like receptor (TLR) 4 agonists (e.g., MPL and GLA), TLR9 agonists (CpG oligonucleotides), nanoparticles encapsulating peanut allergen (with and without adjuvants, such as CpG or rapamycin), Chinese herbal medicine (food allergy herbal formula (FAHF-2)), probiotics, and interferon-gamma. In contrast, anti-IgE therapies such as omalizumab, anti-histamines like ketotifen, and leukotriene receptor antagonists all target the downstream allergic response. Anti-IgE-based therapies appear to be furthest along with probiotics, Chinese herbal medicines, and TLR-4 agonists currently in early phase clinical trials. Meanwhile, nanoparticles represent an innovative delivery vehicle for immunotherapy that could improve both efficacy and decrease allergic side effects. Furthermore, other biologic therapies directed towards the allergic immune response are on the horizon. A number of factors will need to be evaluated in comparing these treatments, including ability to decrease allergic adverse events, safety of the adjunctive therapies themselves, effect on long-term sustained unresponsiveness, and cost. Further phenotyping of food allergy patients may be necessary to determine which ones respond best to each therapy. However, with so many promising adjunctive therapies, it appears likely that clinicians will have a variety of options to optimize the administration of food allergen immunotherapy. We provided a review of these methods, their influence on allergic adverse events, and utility in improving the immunomodulatory effects of food allergen immunotherapy.

journal_name

Clin Rev Allergy Immunol

journal_title

Clinical reviews in allergy & immunology

authors

Virkud YV,Wang J,Shreffler WG

doi

10.1007/s12016-018-8694-z

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

172-189

issue

eissn

1080-0549

issn

1559-0267

pii

10.1007/s12016-018-8694-z

journal_volume

pub_type

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Enhancing the Safety and Efficacy of Food Allergy Immunotherapy: a Review of Adjunctive Therapies.