- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06042309
Contact Allergy to Rubber Accelerators - a Clinical Study
Improving the Diagnosis and Prevention of Contact Allergy to Rubber Accelerators
This study will investigate what concentrations of the most common thiurams and carbamates that elicit allergic contact dermatitis under patch test and what concentrations of the rubber accelerators that elicit allergic contact dermatitis by repeated exposures under simulated use conditions. Further, it will investigate whether a damaged skin barrier as caused by wet work increase the severity of the allergic contact dermatitis.
The participants will be assigned to either the SLS (sodium lauryl sulfate)-group or non SLS-group. For the participants of the SLS-group, one volar forearm will be randomized to be pre-irritated with a soap i.e. detergent: sodium lauryl sulfate (SLS) for 24 hours to simulate wet work. The participants of the non SLS-group will not be pre-irritated with SLS.
Following this, the participants' volar forearms will be exposed to thiurams or carbamates and a control solution every night for 7 nights to simulate the repeated exposure to rubber gloves with accelerators. The skin reactions will be read cf. current international guidelines and further quantified using laser Doppler flowmetry.
During the study, all participants will be patch tested on the upper back with rubber accelerators to investigate their current degree of sensitization and the dose-response relationships.
Study Overview
Status
Conditions
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Christoffer Kursawe Larsen, MD
- Phone Number: +4538673940
- Email: christoffer.kursawe.larsen.01@regionh.dk
Study Locations
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-
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Hellerup, Denmark, 2900
- Recruiting
- Department of Dermatology, Gentofte Hospital, Videncenter For Allergi
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Contact:
- Christoffer K Larsen, MD
- Phone Number: +4538673940
- Email: christoffer.kursawe.larsen.01@regionh.dk
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
Description
Allergic participants
Inclusion Criteria:
- Adults ≥18 years old
- Sensitized to thiurams, carbamates or both.
- Received written and oral information about the study.
- Signed written consent form
Exclusion Criteria:
- Dermatitis on back or arms
- Tattoos or significant scar tissue on exposure areas
- Pregnancy
- Breast feeding
- Recently given birth
- Treatment with systemic immunomodulators within the last 4 weeks
- Treatment with local immunomodulators on arms or back within the last 4 weeks
- Excessive ultraviolet light on arms or back within the last 4 weeks
Healthy Controls:
Inclusion Criteria:
- adults ≥18 years old
- Received written and oral information about the study.
- Signed written consent form
Exclusion Criteria:
- Sensitized to thiurams, carbamates or both.
- Occupational or domestical use of rubber gloves.
- History of atopic dermatitis or contact dermatitis
- Dermatitis on back or arms
- Tattoos or significant scar tissue on exposure areas
- Pregnancy
- Breast feeding
- Recently given birth
- Treatment with systemic immunomodulators within the last 4 weeks
- Treatment with local immunomodulators on arms or back within the last 4 weeks
- Excessive ultraviolet light on arms or back within the last 4 weeks
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: NON-SLS, Allergic participants
Participants allergic to thiurams or carbamates assigned to the NON-SLS group.
|
Repeated exposure to rubber accelerators and control chamber/solution on arms.
Three different concentrations of rubber accelerators and one control chamber/solution will be applied on the arms.
Patch test on the back with thiurams or carbamates in different concentrations and a control chamber/solution
|
Experimental: NON-SLS, Control participants
Participants not allergic to thiurams or carbamates assigned to the NON-SLS group.
|
Repeated exposure to rubber accelerators and control chamber/solution on arms.
Three different concentrations of rubber accelerators and one control chamber/solution will be applied on the arms.
Patch test on the back with thiurams or carbamates in different concentrations and a control chamber/solution
|
Experimental: SLS, Allergic participants
Participants allergic to thiurams or carbamates assigned to the SLS group.
|
Patch test on the back with thiurams or carbamates in different concentrations and a control chamber/solution
Exposure to SLS on a randomized arm
Repeated exposure to rubber accelerators and control chamber/solution on arms.
Two different concentrations of rubber accelerators and one control chamber/solution will be applied on both arms.
|
Experimental: SLS, Control participants
Participants not allergic to thiurams or carbamates assigned to the SLS group.
|
Patch test on the back with thiurams or carbamates in different concentrations and a control chamber/solution
Exposure to SLS on a randomized arm
Repeated exposure to rubber accelerators and control chamber/solution on arms.
Two different concentrations of rubber accelerators and one control chamber/solution will be applied on both arms.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Reading of skin reactions
Time Frame: Day 0, Day 1 (only participants' arms in the SLS-group), Day 2 and Day 3 or Day 4, and Day 7, and Day 8. Further, eventually, if any reactions occur up to Day 16.
|
Development of dermatitis by reading of skin reactions based on international dermatitis scoring guidelines.
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Day 0, Day 1 (only participants' arms in the SLS-group), Day 2 and Day 3 or Day 4, and Day 7, and Day 8. Further, eventually, if any reactions occur up to Day 16.
|
Skin blood flow
Time Frame: Day 0, Day 1 (only participants' arms in the SLS-group), Day 2 and Day 3 or Day 4, and Day 7, and Day 8. Further, eventually, if any reactions occur up to Day 16.
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Changes in blood flow on the arms using laser doppler flowmetry
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Day 0, Day 1 (only participants' arms in the SLS-group), Day 2 and Day 3 or Day 4, and Day 7, and Day 8. Further, eventually, if any reactions occur up to Day 16.
|
Collaborators and Investigators
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- H-22058515
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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