Early intervention oral immunotherapy (OIT) improved a majority of peanut-allergic preschoolers’ ability to eat peanut protein with no reaction, based on data from a randomized trial of 40 children aged 9-36 months.
“We postulated that targeting newly diagnosed young peanut-allergic children would provide the best opportunity to enhance the clinical effectiveness of OIT as an immunomodulatory and disease-modifying treatment by interrupting allergic priming before its full maturation,” wrote Brian P. Vickery, MD, of the University of North Carolina, Chapel Hill, and his colleagues.
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The children received doses of either 300 mg/day or 3,000 mg/day of peanut protein for an average of 29 months. Overall, 78% of the 37 children in the intent-to-treat analysis met the primary endpoint of unresponsiveness to peanut protein 4 weeks after discontinuing oral immunotherapy (85% of the 300-mg group and 71% of the 3,000-mg group). Peanut-specific levels of IgE dropped significantly in the treatment group, and the treated children were 19 times more likely to eat 5 g of peanut protein without reaction than were 154 untreated matched controls.
Three children discontinued the study because of treatment-related adverse events, but no treatment-related severe adverse events, hospitalizations, or deaths were reported.
The findings suggest “that allergic responses may be more easily and durably corrected in young children, and that in this context, relatively low OIT doses are sufficiently potent in suppressing IgE responses and stimulating IgG4 production,” the researchers said.
Find the full study here in the Journal of Allergy and Clinical Immunology (2016 Aug. doi: 10.1016/j.jaci.2016.05.027).