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Pseudoallergen-Free and Low-Histamine Diet in Adolescents With Chronic Spontaneous Urticaria (PAF-LH-CSU)

2026年6月2日 更新者:Ayşe Süleyman、Istanbul University

Clinical Response to a Histamine- and Pseudoallergen-Restricted Diet in Patients With Chronic Urticaria

The goal of this clinical trial is to learn whether a histamine- and pseudoallergen-restricted diet can help reduce symptoms in people with chronic urticaria. It will also learn whether this diet changes the need for urticaria medication.

The main questions it aims to answer are:

Does the diet lower urticaria activity, including hives and itching?

Does the diet improve disease control and quality of life?

Does the diet change the need for urticaria medication?

Which clinical or laboratory factors may affect response to the diet?

There is no comparison group. Researchers will compare participants' symptoms before and after the diet.

Participants will:

Follow a structured histamine- and pseudoallergen-restricted diet

Continue their usual urticaria treatment as recommended by their doctor

Record or report their urticaria symptoms during follow-up

Visit the clinic for assessment of symptoms, disease control, quality of life, medication use, and laboratory findings.

調査の概要

状態

招待による登録

条件

介入・治療

詳細な説明

Chronic spontaneous urticaria in children is a heterogeneous condition characterized by recurrent wheals, angioedema, or both for more than six weeks without a consistent external trigger. Although second-generation H1-antihistamines are the mainstay of treatment, disease activity may persist in some children despite standard care.

Dietary factors, including histamine-rich foods, histamine-releasing foods, and pseudoallergens such as selected additives, preservatives, colorants, and naturally occurring food components, have been proposed as potential aggravating factors in a subset of patients. However, the clinical value of dietary restriction in pediatric chronic spontaneous urticaria remains uncertain, and better evidence is needed to determine whether a time-limited dietary approach provides additional benefit.

This randomized controlled study will evaluate a structured low-histamine and pseudoallergen-free diet as an adjunct to standard guideline-based care in children with chronic spontaneous urticaria. The comparator group will receive standard care with general age-appropriate healthy eating advice, without specific restriction of histamine-rich or pseudoallergen-containing foods during the primary comparison period.

All participants will continue to receive standard clinical care according to current urticaria management principles. Antihistamine treatment will be permitted according to clinical need. The study will also explore whether baseline clinical and laboratory characteristics, including autologous serum skin test status and routine inflammatory markers, are associated with response to the dietary intervention.

Because this is a pediatric dietary study, the dietary intervention will be standardized, time-limited, and implemented with parental guidance. Unnecessary prolonged dietary restriction will be avoided.

研究の種類

介入

入学 (推定)

120

段階

  • 適用できない

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究場所

    • Fatih
      • Istanbul、Fatih、トルコ(Türkiye)、34100
        • Istanbul University, Istanbul Faculty of Medicine, Department of Pediatric Allergy and Immunology

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 子
  • 大人

健康ボランティアの受け入れ

いいえ

説明

IInclusion Criteria:

Children aged 1 to 18 years Diagnosis of chronic spontaneous urticaria Disease duration of at least 6 weeks Presence of active urticaria symptoms at enrollment Ability of the child and/or parent/caregiver to complete symptom and diet follow-up forms Ability and willingness of the family to follow the assigned dietary recommendation Written informed consent from parent or legal guardian Assent from the child when applicable

Exclusion Criteria:

Pure chronic inducible urticaria Urticaria secondary to an identified trigger IgE-mediated food allergy requiring a specific elimination diet Active infection or parasitic disease Oral corticosteroid use within the previous 4 weeks Current or recent biological treatment for chronic urticaria Coeliac disease Inflammatory bowel disease Known systemic mast cell disease Severe chronic systemic disease affecting diet, growth, or follow-up Significant malnutrition or a medical condition requiring a special diet Pregnancy or lactation in postmenarchal adolescents Inability or unwillingness of the child or family to adhere to the assigned dietary recommendation Incomplete follow-up data

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか?

デザインの詳細

  • 主な目的:処理
  • 割り当て:ランダム化
  • 介入モデル:並列代入
  • マスキング:ダブル

武器と介入

参加者グループ / アーム
介入・治療
実験的:Low-histamine and pseudoallergen-free diet group
Children with chronic spontaneous urticaria assigned to this arm will receive a structured low-histamine and pseudoallergen-free diet in addition to standard guideline-based clinical care.
Participants assigned to the intervention group will receive a structured low-histamine and pseudoallergen-free diet for 4 weeks in addition to standard guideline-based clinical care. The diet will restrict histamine-rich foods, foods considered to promote histamine release, and foods containing common pseudoallergen sources such as selected additives, preservatives, colorants, and naturally occurring pseudoallergen-rich foods. Antihistamine treatment will be permitted according to clinical need.
アクティブコンパレータ:General dietary advice control group
Children with chronic spontaneous urticaria assigned to this arm will receive standard guideline-based clinical care with general age-appropriate healthy eating advice, without specific restriction of histamine-rich or pseudoallergen-containing foods during the primary comparison period.
Participants assigned to the control group will receive standard guideline-based clinical care together with general age-appropriate healthy eating advice. No specific restriction of histamine-rich foods, histamine-releasing foods, or pseudoallergen-containing foods will be recommended during the primary 4-week comparison period. Antihistamine treatment will be permitted according to clinical need.

この研究は何を測定していますか?

主要な結果の測定

結果測定
メジャーの説明
時間枠
Change in weekly urticaria activity score
時間枠:Baseline to week 4
Change in weekly urticaria activity score (UAS7) from baseline to week 4 will be compared between the low-histamine and pseudoallergen-free diet group and the general healthy eating advice control group.
Baseline to week 4
Change in urticaria control test score
時間枠:Baseline to week 4
Change in urticaria control test (UCT) score from baseline to week 4 will be compared between the low-histamine and pseudoallergen-free diet group and the general healthy eating advice control group.
Baseline to week 4

二次結果の測定

結果測定
メジャーの説明
時間枠
Change in dermatology quality-of-life score
時間枠:Baseline to week 4
Change in age-appropriate dermatology quality-of-life score from baseline to week 4 will be compared between the low-histamine and pseudoallergen-free diet group and the general healthy eating advice control group.
Baseline to week 4
Change in antihistamine requirement
時間枠:Baseline to week 4
Change in antihistamine requirement from baseline to week 4 will be compared between the two study groups. Antihistamine use will be assessed according to the need for standard-dose or increased-dose second-generation H1-antihistamine treatment.
Baseline to week 4
Proportion of participants achieving clinical response
時間枠:Baseline to week 4
The proportion of participants achieving clinical response at week 4 will be compared between the two study groups. Clinical response will be defined as at least a 50% reduction in weekly urticaria activity score from baseline to week 4.
Baseline to week 4
Dietary adherence
時間枠:Basaline to week 4.
Adherence to the assigned dietary recommendation will be assessed during the 4-week intervention period using a dietary adherence checklist or dietary diary.
Basaline to week 4.

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

出版物と役立つリンク

研究に関する情報を入力する責任者は、自発的にこれらの出版物を提供します。これらは、研究に関連するあらゆるものに関するものである可能性があります。

一般刊行物

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (実際)

2025年11月24日

一次修了 (推定)

2026年11月24日

研究の完了 (推定)

2027年1月1日

試験登録日

最初に提出

2026年6月2日

QC基準を満たした最初の提出物

2026年6月2日

最初の投稿 (実際)

2026年6月8日

学習記録の更新

投稿された最後の更新 (実際)

2026年6月8日

QC基準を満たした最後の更新が送信されました

2026年6月2日

最終確認日

2026年6月1日

詳しくは

本研究に関する用語

その他の研究ID番号

  • ASST-PAF-LH-CSU-2025-3729877
  • 2025-3729877 (その他の識別子:Istanbul University, Istanbul Faculty of Medicine Clinical Research Ethics Committee)

個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

IPD プランの説明

Individual participant data will not be publicly shared because of privacy and ethical restrictions related to pediatric clinical data. De-identified data may be considered upon reasonable request and subject to approval by the study investigators and relevant institutional authorities.

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米国FDA規制医薬品の研究

いいえ

米国FDA規制機器製品の研究

いいえ

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