title: A randomized, double-blind, placebo-controlled pilot study of sublingual versus oral immunotherapy for the treatment of peanut allergy.
abstract: BACKGROUND
  Although promising results have emerged regarding oral immunotherapy (OIT) and sublingual immunotherapy (SLIT) for the treatment of peanut allergy (PA), direct comparisons of these approaches are limited.
  
  
  OBJECTIVE
  This study was conducted to compare the safety, efficacy, and mechanistic correlates of peanut OIT and SLIT.
  
  
  METHODS
  In this double-blind study children with PA were randomized to receive active SLIT/placebo OIT or active OIT/placebo SLIT. Doses were escalated to 3.7 mg/d (SLIT) or 2000 mg/d (OIT), and subjects were rechallenged after 6 and 12 months of maintenance. After unblinding, therapy was modified per protocol to offer an additional 6 months of therapy. Subjects who passed challenges at 12 or 18 months were taken off treatment for 4 weeks and rechallenged.
  
  
  RESULTS
  Twenty-one subjects aged 7 to 13 years were randomized. Five discontinued therapy during the blinded phase. Of the remaining 16, all had a greater than 10-fold increase in challenge threshold after 12 months. The increased threshold was significantly greater in the active OIT group (141- vs 22-fold, P = .01). Significant within-group changes in skin test results and peanut-specific IgE and IgG4 levels were found, with overall greater effects with OIT. Adverse reactions were generally mild but more common with OIT (P < .001), including moderate reactions and doses requiring medication. Four subjects had sustained unresponsiveness at study completion.
  
  
  CONCLUSIONS
  OIT appeared far more effective than SLIT for the treatment of PA but was also associated with significantly more adverse reactions and early study withdrawal. Sustained unresponsiveness after 4 weeks of avoidance was seen in only a small minority of subjects.
authors.affiliation: Department of Pediatrics, Division of Allergy, Immunology and Infectious Diseases, New Jersey Medical School, Rutgers University, Newark, NJ.
authors.forename: Satya D
authors.initials: SD
authors.lastname: Narisety
authors.affiliation: Department of Pediatrics, Division of Allergy and Immunology, Johns Hopkins University School of Medicine, Baltimore, Md.
authors.forename: Pamela A
authors.initials: PA
authors.lastname: Frischmeyer-Guerrerio
authors.affiliation: Department of Pediatrics, Division of Allergy and Immunology, Johns Hopkins University School of Medicine, Baltimore, Md.
authors.forename: Corinne A
authors.initials: CA
authors.lastname: Keet
authors.affiliation: Department of Pediatrics, Division of Allergy and Immunology, Johns Hopkins University School of Medicine, Baltimore, Md.
authors.forename: Mark
authors.initials: M
authors.lastname: Gorelik
authors.affiliation: Department of Medicine, Division of Allergy and Immunology, Johns Hopkins University School of Medicine, Baltimore, Md.
authors.forename: John
authors.initials: J
authors.lastname: Schroeder
authors.affiliation: Department of Medicine, Division of Allergy and Immunology, Johns Hopkins University School of Medicine, Baltimore, Md.
authors.forename: Robert G
authors.initials: RG
authors.lastname: Hamilton
authors.affiliation: Department of Pediatrics, Division of Allergy and Immunology, Johns Hopkins University School of Medicine, Baltimore, Md. Electronic address: rwood@jhmi.edu.
authors.forename: Robert A
authors.initials: RA
authors.lastname: Wood
mesh_terms: D000284:Administration, Oral; D000286:Administration, Sublingual; D000293:Adolescent; D000485:Allergens / Q000008:administration & dosage / Q000276:immunology; D010367:Arachis / Q000009:adverse effects; D002648:Child; D003888:Desensitization, Immunologic / Q000009:adverse effects / Q000379:methods; D005260:Female; D006801:Humans; D007073:Immunoglobulin E / Q000097:blood / Q000276:immunology; D007074:Immunoglobulin G / Q000097:blood / Q000276:immunology; D008297:Male; D021183:Peanut Hypersensitivity / Q000175:diagnosis / Q000276:immunology / Q000628:therapy*; D010865:Pilot Projects; D012882:Skin Tests; D016896:Treatment Outcome
chemical_list: D000485:Allergens; D007074:Immunoglobulin G; D007073:Immunoglobulin E
keywords: Peanut allergy; food allergy; immunotherapy; oral immunotherapy; sublingual immunotherapy