“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”
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.
Drug - Prednisone
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 - Placebo
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
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