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Efficacy and safety of a house dust mites allergoid in patients with allergic rhinitis—PROACAROS study: protocol for a randomized controlled trial
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Efficacy and safety of a house dust mites allergoid in patients with allergic rhinitis—PROACAROS study: protocol for a randomized controlled trial
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Journal Article
Efficacy and safety of a house dust mites allergoid in patients with allergic rhinitis—PROACAROS study: protocol for a randomized controlled trial
2025
Overview
Background
There is an important heterogeneity of the clinical research done to date for allergen immunotherapy (AIT). We plan to assess the safety and efficacy of a house dust mite (HDM) polymerized allergen extract mixture for allergic rhinoconjunctivitis (AR) according to both the EMA and European Academy of Allergy and Clinical Immunology (EAACI) guidelines for the clinical development of products for the treatment of AR.
Methods
We will perform a double-blind, placebo-controlled, randomized parallel group phase III clinical trial to assess the clinical efficacy and safety of a polymerized
Dermatophagoides pteronyssinus
and
Dermatophagoides farinae
allergen extract mixture (Beltavac®) to treat perennial AR in children and adults. Patients with moderate or severe rhinitis symptoms, either associated or not with asthma and confirmed HDM sensitization and without relevant concomitant conditions that may interfere with the planned evaluations test are eligible. Patients will be randomized in a 1:1 ratio to either the active AIT or placebo. The experimental group will receive 12 monthly AIT doses via subcutaneous route with a potency of 2 RC/ml per allergen. The expected sample size is 250 patients from 16 sites in Spain. The main efficacy outcome is the Combined Symptom and Medication Score (CSMS) for rhinitis. It will be patients’ self-assessed and collected through a phone App developed ad hoc for the study to improve the patient adherence and the quality of data. Main secondary outcomes include expanded CSMS for rhinoconjunctivitis symptoms, control of rhinitis, specific IgE and IgG
4
values, quality of life, and the number of adverse reactions. Health-related direct and indirect costs will be also evaluated. Finally, several exploratory parameters will be used to assess the severity of asthma.
Discussion
This phase III clinical trial will be of interest to contribute to the scientific evidence about the efficacy and safety of AIT with allergoids. Our working hypothesis is that the investigational product in patients with AR associated or not with asthma is superior to placebo in providing a clinically significant improvement according to the standards defined by the EAACI. This trial will also supply valuable information about patients reported outcomes using health technology for rhinoconjunctivitis and asthma assessment.
Trial registration
EudraCT 2018–003427-11.
Date on which this record was first entered in the: 2021–06-14.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Adult
/ Animals
/ Antigens, Dermatophagoides - administration & dosage
/ Antigens, Dermatophagoides - adverse effects
/ Antigens, Dermatophagoides - immunology
/ Asthma
/ Child
/ Clinical Trials, Phase III as Topic
/ Conjunctivitis, Allergic - immunology
/ Conjunctivitis, Allergic - therapy
/ Dermatophagoides farinae - immunology
/ Dermatophagoides pteronyssinus - immunology
/ Desensitization, Immunologic - adverse effects
/ Desensitization, Immunologic - methods
/ Humans
/ Medicine
/ Multicenter Studies as Topic
/ Patients
/ Planning
/ Randomized Controlled Trials as Topic
/ Rhinitis
/ Rhinitis, Allergic - immunology
/ Rhinitis, Allergic - therapy
/ Rhinitis, Allergic, Perennial - immunology
/ Rhinitis, Allergic, Perennial - therapy
/ Statistics for Life Sciences
/ Vaccines
