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  • Title: Sustained effects of intralymphatic pollen-specific immunotherapy on Japanese cedar pollinosis.
    Author: Terada T, Omura S, Kikuoka Y, Suzuki M, Inaka Y, Inui T, Matsuda M, Nabe T, Kawata R.
    Journal: Rhinology; 2020 Jun 01; 58(3):241-247. PubMed ID: 32091032.
    Abstract:
    BACKGROUND: Intralymphatic immunotherapy (ILIT) for allergic patients requires only a few intralymphatic injections of the allergen. However, the effectiveness and safety for Japanese cedar pollinosis are unclear. The objectives of this study were to clarify whether and how long ILIT is effective for pollinosis, and its safety. METHODS: In an open pilot investigation followed by a double-blind, placebo-controlled study, patients with Japanese cedar pollinosis received 3 intralymphatic inguinal injections of the pollen extracts before the first pollen season. The symptom medication score (SMS), nasal provocation testing and scoring visual analogue scale (VAS) were assessed after the first-third seasons. RESULTS: (1) Although mild adverse events were induced at the injected site, severe adverse events were not noted. (2) During the latter part of the first season, ILIT-treated patients (n=12) tended to show improved SMS compared to placebo-treated (n=6) without statistical significance. When assessed by nasal provocation testing and VAS scoring after the first season, the effectiveness of ILIT was significant. (3) The effects of ILIT continued until the second or third season. (4) Neither allergen-specific antibodies nor Treg/Breg cells changed in the peripheral blood. CONCLUSIONS: ILIT was safe and effective for Japanese cedar pollinosis. The clinical effects remained for 1-2 years.
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