The aim of this study is to assess irritant or allergic response of 3 developmental cosmetic facial products following a conventional human repeated insult patch test methodology for 6 weeks.
A randomized, single blind (evaluator), single-center, Human Repeat Insult Patch Test (HRIPT) study in healthy adult participants aged 18 to 65 years to evaluate the cutaneous irritation and contact sensitization potential of 3 cosmetic facial skincare products. The participants will undergo repeated cutaneous application of semi-occlusive patch of 3 cosmetic facial skincare products and a reference product as a negative control (saline solution). HRIPT is a long standing, standard method to determine whether exposure to a topical product will elicit a cutaneous (dermal) irritant or allergic response (sensitization) under exaggerated (occluded) conditions. Screening of the participants will be performed at Visit 1 (i.e. from Day 0 to Day 14). The study will progress in 3-phases: Induction phase, Rest Phase and Challenge Phase. The Induction phase will continue for 3 consecutive weeks (Visit 2 to Visit 10); at visit 2, the area for patch application will be designated between the scapula and waistline, away from the spinal mid-line. A controlled amount (0.02 milliliters per centimeters square \[mL/cm\^2\]) of each study product will be randomly assigned within the patch system of each participant into the appropriate separate cell (3 cells for each of the test products and 1 cell for the saline solution). Each patch will remain in place for 48 (± 4) hours on weekdays and 72 (± 4) hours on weekend. Induction phase will be followed by 2-week (Visit 11) Rest phase; where there will be no product or patch applications. Rest phase is further followed by Challenge phase at week 6 (Visit 12 to Visit 15) in which a naïve area of the skin will be selected and a new patch with each of the cells filled with study products will be applied. After 48 (±4) hours of patch application, participants will return to the site, the patch will be removed, and subsequent test-site evaluations will be performed.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Enrollment
302
Participants will be topically applied serum to the dorsum, under a semi-occlusive patch (0.02 milliliters per centimeters square \[mL/cm\^2\] of serum in an individual cell of patch)
Participants will be topically applied lotion to the dorsum, under a semi-occlusive patch (0.02mL/cm\^2 of lotion in an individual cell of patch)
Participants will be topically applied cream to the dorsum, under a semi-occlusive patch (0.02mL/cm\^2 of cream in an individual cell of patch)
GSK Investigational Site
Campinas, São Paulo, Brazil
Percentage of Participants With Potential Sensitisation Reactions as Assessed by Dermatologist on Day 40
Human repeated insult patch test (HRIPT) reactions as per (ICDRG) were scored by trained blind evualuator on the scale of '- to +++', where '-':negative reaction,'?+':doubtful reaction; faint erythema only,'+': weak (non-vesicular) positive reaction;erythema, infiltration and possibly papules,'++': strong (vesicular) positive reaction; erythema, infiltration, papules and vesicles,'+++': extreme positive reaction; bullous reaction, intense erythema and infiltration, coalescing vesicles. Score '-' indicated no adverse reaction, whereas, '+++' indicated very strong adverse reaction. Any positive reaction (a score of '+' or greater) was considered as potential sensitization based upon dermatologist discretion. The assessment of positive reactions was determined by the blinded dermatologist and reported as Yes/ No/ Unable to determine. Percentage of participants with potential sensitization (count of "Yes"/ total reactions) were reported in form of numbers in this outcome measure.
Time frame: Day 40
Percentage of Participants With a Positive Reaction Score (Score of '+' or Greater) as Assessed by a Trained Evaluator
HRIPT reactions as per ICDRG were scored by trained blind evaluator on the scale of '- to +++', where '-':negative reaction,'?+':doubtful reaction; faint erythema only,'+': weak (non-vesicular) positive reaction;erythema, infiltration and possibly papules,'++': strong (vesicular) positive reaction; erythema, infiltration, papules and vesicles,'+++': extreme positive reaction; bullous reaction, intense erythema and infiltration, coalescing vesicles. Score '-' indicated no adverse reaction, whereas, '+++' indicated very strong adverse reaction. Any positive reaction (a score of '+' or greater) was considered as potential sensitization based upon dermatologist discretion. The assessment was determined by the blinded dermatologist and reported as a score of '+' or greater. Percentage of participants with any positive reaction (a score of '+' or greater) will be reported in numbers in this outcome measure.
Time frame: Day 40
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Participants will be topically applied normal saline to the dorsum, under a semi-occlusive patch (0.02mL/cm\^2 of normal saline in an individual cell of patch)