Dupilumab to induce tolerance to SLIT-Melocotón®.

Summary: Food allergy is an increasing problem for population, and treatments inducing tolerance using sublingual immunotherapy is currently under study. Our aim as allergists is to achieve tolerance to sublingual allergen specific immunotherapy with sublingual immunotherapy (SLIT-peach). We present a case report consisting of a 40-year-old woman with anaphylactic reactions after eating fruit and other plant-foods due to sensitization to nonspecific lipid transfer proteins (nsLTP). Her diagnose was LTP-syndrome. This protein is the main pannallergen in our area and causes crossed reaction to multiple plant foods. The principal allergen in this syndrome is rPru p3, present in peach and most vegetables, fruits, nuts and grains. Serum specific IgE levels were performed using microarrays and positive for seven nsLTPs: rAra h9, rCor a8, nJug r3, rPru p3, rTri a 14, nArt v3 and rPla a3. Immediate reaction to SLIT in the fourth month of maintenance-dose led us to interrupt pru p3 immunotherapy. Immediate reaction to omalizumab in the fourth dose in hospital consisting in anaphylaxis prompted us to switch to dupilumab. After four months with this monoclonal antibody, we reintroduced sublingual immunotherapy with pru p3 SLIT-peach^® achieving maintenance dose of four drops a day with no clinical reactions. SLIT-peach^® in our patient is crucial for her due to her restricted diet, the severity of reactions and lack of quality of life measured by Europevall questionary. There are no cases reported for dupilumab in this use.