Characterization of the Molecular Mechanisms Involved in Delayed-Type Hypersensitivity Reactions to House Dust Mite, Diphencyprone, Nickel, and Tuberculin Purified Protein Derivative in Healthy Volunteers

NCT03625219 | Completed

• 1 other identifier: Inno-6048
• Study Type: interventional
• Target: 54
• Locations: 1 country
• Sites: 1

Brief Summary

This study will be conducted in 2 cohorts. In Cohort A, approximately 40 subjects will participate in a single-center, open-label, non-randomized, parallel-group trial to investigate the molecular mechanisms involved in delayed-type hypersensitivity (DTH) to various antigens and assess the most appropriate skin challenge antigen to study the effect of systemic treatments on T cells. Following evaluation of the results in Cohort A, approximately 20 healthy volunteers will be enrolled in Cohort B. This cohort will be a single-center, double-blind, randomized, two-arm, placebo-controlled study to evaluate the effect of corticosteroid treatment on the molecular and cellular phenotype of delayed hypersensitivity response to one if the antigens previously studied in Cohort A.

Conditions

Delayed Type Hypersensitivity

Outcome Measures

Primary Outcomes (3)

• Measurement of gene expression levels in skin biopsies following exposure to various antigens.

  Measurement of gene expression levels in skin biopsies following exposure to various antigens.

  at least 4 days up to 18 days

• Measurement of epidermal thickness in skin biopsies following exposure to various antigens.

  Measurement of epidermal thickness in skin biopsies following exposure to various antigens.

  at least 4 days up to 18 days

• Measurement of number of inflammatory cells in skin biopsies following exposure to various antigens.

  Measurement of number of inflammatory cells in skin biopsies following exposure to various antigens.

  at least 4 days up to 18 days

Study Arms (2)

Prednisone

ACTIVE COMPARATOR

Cohort B only: Subjects will take 40 mg (8 x 5mg tablets) for three consecutive days, then 30 mg (6 x 5mg tablets), 20 mg (4 x 5 mg tablets), 10 mg (2 x 5 mg tablets) and 5 mg (1 x 5 mg tablet) daily for two consecutive days for each dose level for a total of 11 days of treatment.

Drug: Prednisone

Placebo

PLACEBO COMPARATOR

Cohort B only: 8 tablets for 3 consecutive days; then 6 tablets, 4 tablets, 2 tablets, and 1 tablet daily for 2 consecutive days for each tablet count for a total of 11 days

Drug: Placebo

Interventions

Prednisone DRUG

40 mg (8 x 5mg tablets) for three consecutive days, then 30 mg (6 x 5mg tablets), 20 mg (4 x 5 mg tablets), 10 mg (2 x 5 mg tablets) and 5 mg (1 x 5 mg tablet) daily for two consecutive days for each dose level for a total of 11 days of treatment.

Prednisone

Placebo DRUG

8 tablets for 3 consecutive days; then 6 tablets, 4 tablets, 2 tablets, and 1 tablet daily for 2 consecutive days for each tablet count for a total of 11 days

Placebo

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Cohort A:
• Subject is in good general health, according to the investigator's judgment based on vital signs, medical history, physical examination, and laboratory tests performed. For woman of childbearing potential, has had a negative urine pregnancy test at screening and on Day 1 (baseline).
• Subjects has acceptable reaction to selected antigens.
• Subject is willing to participate and is capable of giving informed consent. Note: Consent must be obtained prior to any study-related procedures.
• Subjects must be willing to comply with all study procedures and must be available for the duration of the study.
• Cohort B:
• Subject is in good general health, according to the investigator's judgment based on vital signs, medical history, physical examination, and laboratory tests performed.
• For subject (woman) involved in any sexual intercourse that could lead to pregnancy, subject agrees that an effective contraceptive method will be used, from at least 4 weeks prior to screening until at least 4 weeks after the last study product administration. Effective contraceptive methods include hormonal contraceptives (combined oral contraceptive, patch, vaginal ring, injectable, or implant), intrauterine devices or intrauterine systems, vasectomized partner(s), tubal ligation, or a barrier method of contraception (male condom, female condom, cervical cap, diaphragm, contraceptive sponge) in conjunction with spermicide.
• Note: Hormonal contraceptives must have been on a stable dose for at least 4 weeks before screening.
• Note: The above list of contraceptive methods does not apply to subjects who are abstinent for at least 4 weeks before Day 1 and will continue to be abstinent from penile-vaginal intercourse throughout the study. The reliability of sexual abstinence needs to be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the participant.
• Note: Women of nonchildbearing potential are defined as follows:
• Female who has had surgical sterilization (hysterectomy, bilateral oophorectomy, or bilateral salpingectomy) or;
• Female who has had a cessation of menses for at least 12 months prior to screening without an alternative medical cause, and a follicle-stimulating hormone (FSH) test confirming nonchildbearing potential (refer to laboratory reference ranges for confirmatory levels).
• For woman of childbearing potential, has had a negative urine and serum pregnancy test at screening and negative urine pregnancy test at Day 1 (baseline).
• Subject is willing to participate and is capable of giving informed consent. Note: Consent must be obtained prior to any study-related procedures.

You may not qualify if:

• Cohort A:
• Subject is a female who is breastfeeding, pregnant, or who is planning to become pregnant during the study.
• Subject has a known history of severe allergic reaction (local or systemic) to the tested hapten.
• Subject has a history of skin disease or presence of skin condition that, in the opinion of the investigator, would interfere with the study assessments including active urticaria, psoriasis, atopic dermatitis, active contact dermatitis and excited (angry back) skin syndrome.
• Medical history of dermatographism.
• History of contact dermatitis to medical adhesive bandages or glue.
• Presence of any scar tissue, tattoos, scratches, open sores, excessive hair, or skin damages at tested/injection sites that in the opinion of the investigator may interfere with study evaluations.
• Subject is known to have immune deficiency or is immunocompromised.
• Subject has a known history of chronic infectious disease (e.g., hepatitis B, hepatitis C, or infection with human immunodeficiency virus).
• Subject has evidence or suspicion of active or latent TB or a clear history of treatment for TB disease or infection
• Subject has a hypersensitivity to any of the components of the patch test matrix or the hapten excipients.
• Subject has a known hypersensitivity to Tuberculin Purified Protein Derivative or to any components of the formulation or container. .
• Subject previously had a severe reaction (e.g., necrosis, blistering, anaphylactic shock or ulcerations) to a previous tuberculin skin test
• Cohort B:
• Subject is a female who is breastfeeding, pregnant, or who is planning to become pregnant during the study.

Sponsors & Collaborators

• Innovaderm Research Inc.: lead

Study Sites (1)

Innovaderm Research Inc.

Montreal, Quebec, H2K 4L5, Canada

Location

MeSH Terms

Conditions

Hypersensitivity, Delayed

Interventions

Prednisone

Condition Hierarchy (Ancestors)

Hypersensitivity; Immune System Diseases

Intervention Hierarchy (Ancestors)

Pregnadienediols; Pregnadienes; Pregnanes; Steroids; Fused-Ring Compounds; Polycyclic Compounds

Study Officials

• Robert Bissonnette

  Principal Investigator

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: QUADRUPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: Cohort A Open label: 4 groups of 10 subjects Cohort B Double-Blind: 1 group of 20 subjects

Study Record Dates

• First Submitted: July 17, 2018
• First Posted: August 10, 2018
• Study Start: July 26, 2018
• Primary Completion: March 12, 2020
• Study Completion: June 9, 2020
• Last Updated: July 17, 2020

Record last verified: 2020-07

Data Sharing

• IPD Sharing: Will not share

Locations

CA (1)