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Effect of Sublingual Immunotherapy in Patients With Atopic Dermatitis

Study Purpose

Atopic dermatitis (AD) is a chronic and recurrent inflammatory disease, prevalent between 1 and 20% in the world population, with a predominance of childhood, but which may be present in adult life. AD results from a complex interaction between genetic and environmental factors, with the presence of a defect in the skin barrier and deregulation of the immune response, culminating in an inflammatory response in the skin predominantly type 2. Disease control is based on restoring skin hydration, smoothing itching and controlling the process specific sensitizing agents such as inhalant allergens and foods that may pathogenesis of the disease. In selected patients who present IgE mediated response to inhalant allergens, allergen-specific immunotherapy can be effective. Classically, the subcutaneous route is the most used, however, sublingual immunotherapy (SLIT) has been used in increasing form. There are still few studies on the efficacy and safety of SLIT in atopic dermatitis. Therefore, the present study aims to to investigate the role of SLIT in the management of patients with AD allergic mites, through a randomized, double-blind and placebo-controlled study

Recruitment Criteria

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Accepts Healthy Volunteers

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Study Type
Eligible Ages 3 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

- Diagnosis of AD according to Hanifin and Rajka criteria; - Age greater than or equal to 3 years; - SCORAD equal to or greater than 15 points; - Presence of skin tests and / or specific IgE positive for Dermatophagoides pteronyssinus and / or Dermatophagoides farinae;

Exclusion Criteria:

- Pregnancy or breastfeeding;

Trial Details

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.

Trial ID:

Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Phase 4

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Lead Sponsor
Casa Espirita Terra de Ismael

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator
Karla L Arruda, PhD
Principal Investigator Affiliation Faculdade de Medicina de Ribeirão Preto

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Agency Class
Overall Status Active, not recruiting
Countries Brazil

The disease, disorder, syndrome, illness, or injury that is being studied.

Atopic Dermatitis, Effects of Immunotherapy
Additional Details

A total of 94 patients, 3 years of age or older, with clinical diagnosis of AD, without distinction of gender, ethnicity or social group, will be selected at HCFMRP-USP Allergy and Dermatology outpatient clinics. These patients will undergo clinical evaluation and laboratory tests, including blood count, total IgE, inhalant panel specific IgE, and immediate hypersensitivity skin tests, and mite allergen-specific IgG4 (Der p 1 and Der p 2), before of the study. To calculate the sample size, a response rate to the medication was defined as a 15

  • - point decrease in SCORAD (a score that includes lesion extent, intensity and subjective symptoms such as pruritus and sleep), which was determined through the experience of the service.
It was estimated that 40% of the patients in the treatment group and 15% of the placebo group reached the proposed rate through a test with 80% power, and the need for 47 individuals in each group was defined. Patients in the treatment group will undergo allergen-specific immunotherapy sublingually, with weekly doses of extracts of mites Dermatophagoides pteronyssinus and Dermatophagoides farinae (60% and 40% respectively), according to the scheme described in Tables 1 and 2. Patients in the control group will be submitted to the same administration schedule, but with the diluent of the allergenic extract (doubly distilled water solution and glycerin). Patients will be divided into groups according to randomization. Subjects will be randomly divided into blocks of random size 4 or 6 and stratified according to age (less than 12 years and greater / equal 12 years) and severity (SCORAD less than 50 and greater / equal 50), performed by through the RedCap platform, available at FMRPUSP. This process will be performed by laboratory staff who will provide the extracts and the researchers will not have access to the lists of patients in each group. As for blinding, the bottles with extract and placebo will be provided by the already coded laboratory, and the team will only be responsible for the delivery and storage of the same. Table 1
  • - Weekly dose schedule Monday Wednesday Friday 1.
st week 1 drop 2 drops 4 drops 2. nd week 6 drops 8 drops 8 drops Table 2
  • - Monthly Dilution Schedule Dilution of mite extract 1st and 2nd weeks (1st month) 1: 1000000 v: v 3rd and 4th weeks (1st month) 1: 100000 v: v 1st and 2nd weeks (2nd month)1: 10000 v: v 3rd and 4th weeks (2nd month) 1:1000 v: v 1st and 2nd weeks (3rd month) 1: 100 v:v 3rd and 4th weeks (3rd month) 1:10 v:v 3rd to 18th month 1:10 v: v Individuals will be selected during the SCORAD, of the outpatient clinics of the Allergy and Dermatology Service of the HCFMRP-USP.
All medical records and clinical and dermatological examination will be recorded in medical records, as well as clinical evaluation by SCORAD , quality of life questionnaire and personal scale of symptoms, being evaluated at the beginning of treatment, after two, three, six, nine, twelve, fifteen and eighteen months of evolution. Serum levels of IgG4 specific mite for Der p 1 and Der p 2 will be determined by ImmunoCAP and evaluated at the beginning and the end of treatment. Interleukins 4, 5, 9, 10 13, 17, TNFα, TGFβ and interferon-γ will be performed in plasma in the beginning, with 9 months of evolution and at the end of the study.

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International Sites

Ribeirão Preto, Sao Paulo, Brazil



Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto

Ribeirão Preto, Sao Paulo, 14048-900

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