- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04325802
Treatment of Chronic Itch in Atopic Dermatitis With Opioid Antagonist Naltrexone
Treatment of Chronic Itch in Atopic Dermatitis With Opioid Antagonist Naltrexone and Effects on Skin Circadian Rhythm
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Specific aims:
A1 Evaluate the underlying mechanism of itch severity in terms of circadian rhythm by collecting epidermis at different circadian stages using suction blisters. This will be done in AD patients with chronic itch. The cells will be isolated from part of the suction blisters and used to isolate and sequence RNA to evaluate and compare the differential protein and RNA expression in suction blister taken from symptomatic & non-symptomatic areas in patients with AD at different time points. The investigators will then correlate the itch severity symptoms to clock gene and opioid receptor levels and RNA expression differential pattern. A1 will be evaluated by study arm A and the results from this study will serve to decide on time point taking the suction blisters for the therapeutic/mechanistic studies (arm B and C).
A2 Investigate the mechanistic role and therapeutic efficacy of opioid receptors in chronic itch. For this purpose, a cross-over, placebo-controlled design will be used to treat patients with opioid receptor antagonist (Naltrexone) by expanding on our existing trial. The investigators will collect, evaluate, quantify and compare the differential protein and RNA expression in epidermis taken by suction blisters from symptomatic and non-symptomatic areas in patients with AD on Placebo or Naltrexone treatment. Transcriptome analysis will be focused, but not restricted to, analysis of neuroinflammatory and neuronal markers (including cytokines, GPCR and opioid receptors). Confirmation will occur using in-situ hybridization of biopsies to correlate specific cell type and location and qPCR expression of in vitro cultures. The binding studies using fluorescent labeled opioid ligands and internalization pattern will be carried out.
A3 Test the underlying mechanisms of the opioid system with nerve-keratinocyte interaction and possible effects on itch transduction from skin to nerves by using an in vitro neuron-keratinocyte co-culture model. Moreover, the investigators plan to validate itch-causing networks and pathways found in A2 using this in vitro model and will be able to evaluate calcium flux threshold changes after exposure to external stimuli (e.g. light, or mechanic stimuli) onto keratinocytes and neuronal somata under different opioid exposure conditions. The FC derived sensory neurons will be co-cultured with different patient KC. The investigators will test the reaction pattern of KC and transmission of the signal to connected peripheral sensory neurons by Fluo-4 AM Calcium imaging and electrophysiology. The reaction will be responding to the odorant Sandalore, as the investigators have previously published that Sandalore induces these desired calcium fluxes.
Apply the in vitro epithelial/nerve model to validate possible itch pathways identified by epigenetic analysis in the clinical trials by confirming the expression pattern with qPCR and functional assays on cells with CRISPR knockout of the RNA targets, opioid trafficking, calcium imaging and electrophysiology. Finally, further develop co-cultures between human skin and iPS-derived human peripheral neurons to perform functional studies.
Study Type
Phase
- Phase 2
Contacts and Locations
Study Contact
- Name: Paul Bigliardi, MD
- Phone Number: 612-625-6118
- Email: mill4869@umn.edu
Study Locations
-
-
Minnesota
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Minneapolis, Minnesota, United States, 55455
- University of Minnesota
-
Contact:
- Paul Bigliardi, MD
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Diagnosis of AD via simplified UK Working Group Criteria and a baseline PSGA score of 2 or greater
- Willingness to adhere to study protocol
- Subjects taking hormone-containing medications must be on a stable dose for 6 months prior to study start to avoid any confounding influence on sensory and pain perception
Exclusion Criteria:
- Use of topical or oral anti-inflammatory medications for 2 weeks prior to the study start.
- Use of topical or oral anti-histamines for 2 weeks prior to the study start (as rescue medication allowed).
- Use of topical or oral anti-pruritic agents for 2 weeks prior to the study start.
- Use of oral neuromodulatory agents for 2 months prior to study start.
- Current use of chronic pain medications (including opioids, antidepressants and anti-epileptic drugs).
- Use of nicotine-containing products for the past 6 months prior to study start.
- History of radiation or chemotherapy.
- History of traumatic injury on prospective test sites.
- Unstable thyroid function within the past 6 months prior to study start to exclude thyroid-related neuropathy
- Known history of central or peripheral nervous system dysfunction.
- History of acute hepatitis, chronic liver disease or end stage liver disease.
- History of human immunodeficiency virus (HIV) or acquired immune deficiency syndrome.
- History of neuropathy associated with chronic obstructive pulmonary disease, diabetes mellitus, documented exposure to organophosphates or heavy metals or polychlorinated biphenyls.
- Known nutritional deficiency (vitamin B12, vitamin D, iron or zinc) within 3 months prior to the study start.
- Use of illicit drugs within the past 6 months prior to study start and/or opioid use disorder.
- Regular use of opioids for chronic pain
- Lyme disease, porphyria, rheumatoid arthritis, Hansen's disease (leprosy) or use of antineoplastic chemotherapeutic agents.
- Subject has any medical condition that, in the judgment of the Investigator, would jeopardize the subject's safety following exposure to the administered medications.
- Adults lacking capacity to consent
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Cohort 1: Placebo, then Intervention
Patients will start with placebo in week 1 and cross over to Naltrexone in week 3.
There will be a wash-out phase during week 2 using only moisturizer regularly and if necessary as rescue medications topical corticosteroids and/or antihistamines.
The same rescue medications can be used during the following weeks of the cross-over treatment.
At visit 2 and 4 patients will be asked the area where they are experiencing most intense itch and we will take there suction blisters (preferably on the trunk).
Suction blisters will be taken after week 1 (1 week on treatment arm 1) and after week 3 (1 week on treatment arm 2).
|
50mg Naltrexone daily
Placebo (Mannitol) daily
|
Active Comparator: Cohort 2: Intevention, then Placebo
Patients will start with Naltrexone in week 1 and cross over to the palcebo treatment in week 3.
There will be a wash-out phase during week 2 using only moisturizer regularly and if necessary as rescue medications topical corticosteroids and/or antihistamines.
The same rescue medications can be used during the following weeks of the cross-over treatment.
At visit 2 and 4 patients will be asked the area where they are experiencing most intense itch and we will take there suction blisters (preferably on the trunk).
Suction blisters will be taken after week 1 (1 week on treatment arm 1) and after week 3 (1 week on treatment arm 2).
|
50mg Naltrexone daily
Placebo (Mannitol) daily
|
No Intervention: Circadian Rhythm of Itch
Patients in this arm will receive no intervention, only data collection.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Itch Intensity (Visual Analog Scale)
Time Frame: 1 week
|
Change in itch intensity will be measured using a Visual Analogue scale (VAS).
Scores range from 0 to 10, with higher scores indicating greater itch intensity.
|
1 week
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Paul Bigliardi, MD, University of Minnesota
Study record dates
Study Major Dates
Study Start (Anticipated)
Primary Completion (Anticipated)
Study Completion (Anticipated)
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
Keywords
Additional Relevant MeSH Terms
- Skin Diseases
- Immune System Diseases
- Hypersensitivity, Immediate
- Genetic Diseases, Inborn
- Skin Diseases, Genetic
- Hypersensitivity
- Skin Manifestations
- Skin Diseases, Eczematous
- Dermatitis
- Eczema
- Pruritus
- Dermatitis, Atopic
- Physiological Effects of Drugs
- Peripheral Nervous System Agents
- Sensory System Agents
- Narcotic Antagonists
- Alcohol Deterrents
- Naltrexone
Other Study ID Numbers
- DERM-2019-28471
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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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