The purpose of this study was to investigate the efficacy, safety, and pharmacokinetics of adalimumab in Japanese participants with generalized pustular psoriasis (GPP) who did not have an adequate response to their currently approved treatment.
This was a Phase 3, multicenter, open-label, single-arm study of adalimumab in Japanese participants with generalized pustular psoriasis (GPP). The study included a 30-day screening period, a 52-week treatment period, and a 70-day follow-up period. The dose regimen of adalimumab used in this study was 80 mg at Week 0 by subcutaneous (SC) injection, followed by 40 mg every other week (eow) on and after Week 2 until Week 50. Dose escalation to 80 mg eow was allowed for participants who did not have adequate response on or after Week 8.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
10
Adalimumab pre-filled syringe, administered by subcutaneous injection
Proportion of Participants Achieving Clinical Response at Week 16
Clinical Response was defined as reduction of the Generalized Pustular Psoriasis (GPP) total skin score (range 0-9, with 9 representing severe symptoms) relative to baseline (Day 1), according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total skin score is the combined skin scores for area of erythema (redness), area of erythema with pustules (small pockets of pus), and area of edema (swelling). Clinical Response was defined as the improvement (reduction) of total skin score of at least 1 point (if the participant's baseline total skin score was 3); improvement (reduction) at least 2 points (if the participant's baseline total skin score was 4-9); or remission if the total skin score was 0.
Time frame: Baseline and Week 16
Number of Participants Achieving Clinical Response Over Time
Clinical Response was defined as reduction of the Generalized Pustular Psoriasis (GPP) total skin score (range 0-9, with 9 representing severe symptoms) relative to baseline (Day 1), according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total skin score is the combined skin scores for area of erythema (redness), area of erythema with pustules (small pockets of pus), and area of edema (swelling). Clinical Response was defined as the improvement (reduction) of total skin score of at least 1 point (if the participant's baseline total skin score was 3); improvement (reduction) at least 2 points (if the participant's baseline total skin score was 4-9); or remission if the total skin score was 0.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 24, Week 36, Week 52
Number of Participants Achieving Clinical Remission Over Time
The Generalized Pustular Psoriasis (GPP) total skin score (range 0-9, with 9 representing severe symptoms) was calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total skin score is the combined skin scores for area of erythema (redness), area of erythema with pustules (small pockets of pus), and area of edema (swelling). Clinical remission was defined as a total skin score of 0.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Time frame: Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in the Total GPP Score Over Time
The Generalized Pustular Psoriasis (GPP) total score (range 0-17, with 17 representing severe disease) was calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total skin score (range 0-9, with 9 representing severe symptoms) is the combined skin scores for area of erythema (redness), area of erythema with pustules (small pockets of pus), and area of edema (swelling). The systemic and laboratory results score (\[range 0-8, with 8 representing severe disease\] assesses body temperature, white blood cell \[WBC\] count, high-sensitivity C-reactive protein \[hs-CRP\], and serum albumin). Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in JDA Severity Index of GPP Over Time
The Generalized Pustular Psoriasis (GPP) total score (range 0-17, with 17 representing severe disease) was calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total skin score (range 0-9, with 9 representing severe symptoms) is the combined skin scores for area of erythema (redness), area of erythema with pustules (small pockets of pus), and area of edema (swelling). The systemic and laboratory results score (\[range 0-8, with 8 representing severe disease\] assesses body temperature, white blood cell \[WBC\] count, high-sensitivity C-reactive protein \[hs-CRP\], and serum albumin). A total score on the JDA severity index of 0-6 is categorized as "Mild", "Moderate" is 7-10, and "Severe" is 11-17.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Total Skin Score Over Time
The Generalized Pustular Psoriasis (GPP) total skin score (range 0-9, with 9 representing severe symptoms) was calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total skin score is the combined skin scores for area of erythema (redness), area of erythema with pustules (small pockets of pus), and area of edema (swelling). Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Percent Change From Baseline in Total Skin Score Over Time
The Generalized Pustular Psoriasis (GPP) total skin score (range 0-9, with 9 representing severe symptoms) was calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total skin score is the combined skin scores for area of erythema (redness), area of erythema with pustules (small pockets of pus), and area of edema (swelling). Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Total Systemic/Laboratory Test Score Over Time
The Generalized Pustular Psoriasis (GPP) total systemic/laboratory test score (\[range 0-8, with 8 representing severe disease\] assesses body temperature, white blood cell \[WBC\] count, high-sensitivity C-reactive protein \[hs-CRP\], and serum albumin). Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Total Erythema Area Over Time
The Generalized Pustular Psoriasis (GPP) skin score scores for the total area of erythema (redness) were calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total erythema area is evaluated on a scale of 0 (none) to 3 (severe), with the percentage of body surface area involvement defined as follows: severe ≥ 75%; moderate, ≥ 25% and \< 75%; mild, \< 25%); and none (0%). Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Total Erythema Area With Pustules Over Time
The Generalized Pustular Psoriasis (GPP) skin score scores for the total area of erythema with pustules (small pockets of pus) were calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total erythema area with pustules is evaluated on a scale of 0 (none) to 3 (severe), with the percentage of body surface area involvement defined as follows: severe ≥ 50%; moderate, ≥ 10% and \< 50%; mild, \< 10%); and none (0%). Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Total Edema Area Over Time
The Generalized Pustular Psoriasis (GPP) skin score scores for the total area of edema (swelling) were calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total area of edema is evaluated on a scale of 0 (none) to 3 (severe), with the percentage of body surface area involvement defined as follows: severe ≥ 50%; moderate, ≥ 10% and \< 50%; mild, \< 10%); and none (0%). Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Body Temperature Over Time
Body temperature (oral) was obtained at each visit prior to blood sampling.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in White Blood Cell (WBC) Concentration Over Time
Blood was drawn at each study visit, and white blood cell concentration was determined.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in High-Sensitivity C-Reactive Protein (Hs-CRP) Over Time
Blood was drawn at each study visit, and high-sensitivity C-reactive protein (hs-CRP) concentration was determined.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Serum Albumin Over Time
Blood was drawn at each study visit, and serum albumin concentration was determined.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Number of Participants Achieving "Mild" in the JDA Severity Index of Generalized Pustular Psoriasis (GPP) for Participants With "Moderate" or "Severe" at Baseline Over Time
The Generalized Pustular Psoriasis (GPP) total score (range 0-17, with 17 representing severe disease) was calculated according to Japan Dermatology Association (JDA) severity index in GPP medical care guideline 2014. The total skin score (range 0-9, with 9 representing severe symptoms) is the combined skin scores for area of erythema (redness), area of erythema with pustules (small pockets of pus), and area of edema (swelling). The systemic and laboratory results score (\[range 0-8, with 8 representing severe disease\] assesses body temperature, white blood cell \[WBC\] count, high-sensitivity C-reactive protein \[hs-CRP\], and serum albumin). A total score on the JDA severity index of 0-6 is categorized as "Mild", "Moderate" is 7-10, and "Severe" is 11-17.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Proportion of Participants Achieving Treatment Success in Physician's Global Assessment of Generalized Pustular Psoriasis (PGA-GPP) Over Time
The Physician's Global Assessment of Generalized Pustular Psoriasis (PGA-GPP) is a 6-point scale used to measure the severity of skin disease at the time of the qualified investigator's evaluation of the participant. The degree of overall severity was evaluated using the following categories: erythema, pustulation, and edema, and graded as follows. Grade 0 = cleared, except for residual discoloration; Grade 1 = minimal; Grade 2 = mild; Grade 3 = moderate; Grade 4 = severe; and Grade 5 = very severe. The score is an arithmetic average of the grades for erythema, pustulation, and edema, rounded to the nearest whole number. Treatment Success was defined by at least a 2 grade improvement relative to baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Change From Baseline in Physician's Global Assessment of Generalized Pustular Psoriasis (PGA-GPP) Grade Over Time
The Physician's Global Assessment of Generalized Pustular Psoriasis (PGA-GPP) is a 6-point scale used to measure the severity of skin disease at the time of the qualified investigator's evaluation of the participant. The degree of overall severity was evaluated using the following categories: erythema, pustulation, and edema, and graded as follows. Grade 0 = cleared, except for residual discoloration; Grade 1 = minimal; Grade 2 = mild; Grade 3 = moderate; Grade 4 = severe; and Grade 5 = very severe. The score is an arithmetic average of the grades for erythema, pustulation, and edema, rounded to the nearest whole number.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Proportion of Participants Achieving Physician's Global Assessment of Generalized Pustular Psoriasis (PGA-GPP) Grade 0 or 1 for Those With PGA Grade of at Least 2 at Baseline Over Time
The Physician's Global Assessment of Generalized Pustular Psoriasis (PGA-GPP) is a 6-point scale used to measure the severity of skin disease at the time of the qualified investigator's evaluation of the participant. The degree of overall severity was evaluated using the following categories: erythema, pustulation, and edema, and graded as follows. Grade 0 = cleared, except for residual discoloration; Grade 1 = minimal; Grade 2 = mild; Grade 3 = moderate; Grade 4 = severe; and Grade 5 = very severe. The score is an arithmetic average of the grades for erythema, pustulation, and edema, rounded to the nearest whole number.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Proportion of Participants Achieving Psoriasis Area and Severity Index 90 (PASI 90) Over Time
The proportion of participants with a ≥ 90% reduction (improvement) in the Psoriasis Area and Severity Index (PASI) score from baseline was calculated. PASI is a combination of the intensity of psoriasis, assessed for erythema (reddening), induration (plaque thickness) and desquamation (scaling) on a scale from no symptoms (0), slight (1), moderate (2), marked (3) or very marked (4), together with the percentage of the area affected, rated on a scale from 0 to 6. PASI scoring is performed at four body areas, the head, arms, trunk, and legs. The total PASI score ranges from 0 to 72. The higher the total score, the more severe the disease.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Proportion of Participants Achieving Psoriasis Area and Severity Index 75 (PASI 75) Over Time
The proportion of participants with a ≥ 75% reduction (improvement) in the Psoriasis Area and Severity Index (PASI) score from baseline was calculated. PASI is a combination of the intensity of psoriasis, assessed for erythema (reddening), induration (plaque thickness) and desquamation (scaling) on a scale from no symptoms (0), slight (1), moderate (2), marked (3) or very marked (4), together with the percentage of the area affected, rated on a scale from 0 to 6. PASI scoring is performed at four body areas, the head, arms, trunk, and legs. The total PASI score ranges from 0 to 72. The higher the total score, the more severe the disease.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Proportion of Participants Achieving Psoriasis Area and Severity Index 50 (PASI 50) Over Time
The proportion of participants with a ≥ 50% reduction (improvement) in the Psoriasis Area and Severity Index (PASI) score from baseline was calculated. PASI is a combination of the intensity of psoriasis, assessed for erythema (reddening), induration (plaque thickness) and desquamation (scaling) on a scale from no symptoms (0), slight (1), moderate (2), marked (3) or very marked (4), together with the percentage of the area affected, rated on a scale from 0 to 6. PASI scoring is performed at four body areas, the head, arms, trunk, and legs. The total PASI score ranges from 0 to 72. The higher the total score, the more severe the disease.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Psoriasis Area and Severity Index (PASI) Score Over Time
The mean change in the Psoriasis Area and Severity Index (PASI) score from baseline was calculated. PASI is a combination of the intensity of psoriasis, assessed for erythema (reddening), induration (plaque thickness) and desquamation (scaling) on a scale from no symptoms (0), slight (1), moderate (2), marked (3) or very marked (4), together with the percentage of the area affected, rated on a scale from 0 to 6. PASI scoring is performed at four body areas, the head, arms, trunk, and legs. The total PASI score ranges from 0 to 72. The higher the total score, the more severe the disease. Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Mean Percent Change From Baseline in Psoriasis Area and Severity Index (PASI) Score Over Time
The percent change in the Psoriasis Area and Severity Index (PASI) score from baseline was calculated. PASI is a combination of the intensity of psoriasis, assessed for erythema (reddening), induration (plaque thickness) and desquamation (scaling) on a scale from no symptoms (0), slight (1), moderate (2), marked (3) or very marked (4), together with the percentage of the area affected, rated on a scale from 0 to 6. PASI scoring is performed at four body areas, the head, arms, trunk, and legs. The total PASI score ranges from 0 to 72. The higher the total score, the more severe the disease. Negative values indicate improvement from baseline.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 24, Week 36, Week 52
Proportion of Participants Achieving Dermatology Life Quality Index (DLQI) Score of 0 Over Time
The DLQI questionnaire asks participants to evaluate the degree that psoriasis has affected their quality of life in the last week, and includes the following parameters: symptoms and feelings, daily activities, leisure activities, work or school activities, personal relationships and treatment- related feelings. Participants respond to 10 questions on a scale from 0 (not at all) to 3 (very much); the range of the total score is 0 to 30. A score of 21 to 30 means that psoriasis has an extremely large effect on the participant's life whereas 0-1 means that the disease has no effect at all.
Time frame: Week 8, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Dermatology Life Quality Index (DLQI) Score Over Time
The DLQI questionnaire asks participants to evaluate the degree that psoriasis has affected their quality of life in the last week, and includes the following parameters: symptoms and feelings, daily activities, leisure activities, work or school activities, personal relationships and treatment- related feelings. Participants respond to 10 questions on a scale from 0 (not at all) to 3 (very much); the range of the total score is 0 to 30. A score of 21 to 30 means that psoriasis has an extremely large effect on the participant's life whereas 0-1 means that the disease has no effect at all. Negative values indicate improvement from baseline.
Time frame: Baseline, Week 8, Week 16, Week 24, Week 36, Week 52
Mean Change From Baseline in Short Form-36 Health Status Survey Version 2 (SF-36 V2) Score Over Time
The Short Form-36 Health Status Survey Version 2 (SF-36 V2) is a 36-item generic health-related quality of life questionnaire to assess the participant's view of their health consisting of 2 components: physical and mental. For each component, a transformed summary score is calculated using 8 sub-domains: physical functioning, role-physical, bodily pain, general health, vitality, social functioning, role-emotional, and mental health. Scores range from 0 to 100. Higher scores indicate a better health state.
Time frame: Baseline, Week 8, Week 16, Week 24, Week 36, Week 52
Proportion of Participants Taking Systemic Co-medication for Generalized Pustular Psoriasis (GPP) at Any Time During the Study
GPP-specific co-medications were documented at each scheduled study visit.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 20, Week 24, Week 28, Week 32, Week 36, Week 40, Week 44, Week 48, Week 52
Proportion of Participants Taking Topical Co-medication for Generalized Pustular Psoriasis (GPP) at Any Time During the Study
Participants using topical co-medications for GPP were documented at each scheduled study visit.
Time frame: Baseline, Week 2, Week 4, Week 8, Week 12, Week 16, Week 20, Week 24, Week 28, Week 32, Week 36, Week 40, Week 44, Week 48, Week 52