This was a Phase 3 randomized, parallel-group, double-blind, placebo-controlled trial (blinded treatment \[BT\] period) followed by an open-label extension \[OLE\] period intended to evaluate the efficacy and safety of oral PRN1008 in moderate to severe pemphigus. After completing the open-label extension period, eligible participants might continue in a long term extension (LTE) Period of 48 weeks.
A total of 131 male or female participants with newly diagnosed or relapsing moderate to severe pemphigus (pemphigus vulgaris \[PV\] or pemphigus foliaceus \[PF\]) were enrolled in the trial worldwide. The trial would last 68 weeks (approximately 17 months) for each participant. For participants eligible to enroll in the LTE, the trial might last up to 116 weeks. Participants were randomized at Day 1, using a 1:1 ratio to receive PRN1008 or placebo twice per day, by relapsing/newly diagnosed disease history (newly diagnosed defined as within 6 months of screening).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
131
Pharmaceutical form: Tablet Route of administration: Oral
Pharmaceutical form: Tablet Route of administration: Oral
Percentage of Participants Who Achieved Complete Remission (CR) With a Corticosteroids Dose of Less Than or Equal to (<=) 10 mg/Day From Week 29 to Week 37: Pemphigus Vulgaris Participants in Modified Intent-to-Treat (PV mITT) Population
Complete remission was defined as absence of new and established lesions and was intended to mean "no disease activity" for 2 consecutive weeks, with Pemphigus Disease Area Index (PDAI) activity score =0 and CS dose \<=10 mg. PDAI score weighted for number and size of lesions with score of 0 (absent) to 10 given for skin (12 body locations), scalp and mucous membrane showing disease activity (erosions/blisters or new erythema). PDAI total score ranged from 0 to 250 points representing disease activity (120 points for skin activity; 10 points for scalp activity; 120 points for mucosal activity). Higher score indicated more disease activity. In this outcome measure (OM), percentage of participants who achieved CR while on a daily corticosteroids dose of \<=10 mg/day were reported.
Time frame: From Week 29 to Week 37
Percentage of Participants Who Achieved Complete Remission With a Corticosteroids Dose of <=10 mg/Day From Week 29 to Week 37: Modified Intent-to-Treat (mITT) Population
Complete remission was defined as absence of new and established lesions and was intended to mean "no disease activity" for 2 consecutive weeks, with PDAI activity score =0 and CS dose \<=10 mg. PDAI score weighted for number and size of lesions with score of 0 (absent) to 10 given for skin (12 body locations), scalp and mucous membrane showing disease activity (erosions/blisters or new erythema). PDAI total score ranged from 0 to 250 points representing disease activity (120 points for skin activity; 10 points for scalp activity; 120 points for mucosal activity). Higher score indicated more disease activity. In this OM, percentage of participants who achieved CR while on a daily corticosteroids dose of \<=10 mg/day were reported.
Time frame: From Week 29 to Week 37
Cumulative Oral Corticosteroid Dose From Baseline to Week 37: PV mITT Population
The cumulative dose (in milligrams) of sponsor-provided oral CS (prednisone or prednisolone) received by the participants during the BT period was calculated from Baseline to Week 37 and is reported in this OM.
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Central Recruiting (Principia Biopharma)
Boca Raton, Florida, United States
Central Recruiting (Principia Biopharma)
Coral Gables, Florida, United States
Central Recruiting (Principia Biopharma)
Atlanta, Georgia, United States
Central Recruiting (Principia Biopharma)
Ann Arbor, Michigan, United States
Central Recruiting (Principia Biopharma)
Ann Arbor, Michigan, United States
Central Recruiting (Principia Biopharma)
Rochester, Minnesota, United States
Central Recruiting (Principia Biopharma)
Albuquerque, New Mexico, United States
Central Recruiting (Principia Biopharma)
New York, New York, United States
Central Recruiting (Principia Biopharma)
New York, New York, United States
Central Recruiting (Principia Biopharma)
Chapel Hill, North Carolina, United States
...and 78 more locations
Time frame: Baseline to Week 37
Cumulative Oral Corticosteroid Dose From Baseline to Week 37: mITT Population
The cumulative dose (in milligrams) of sponsor-provided oral CS (prednisone or prednisolone) received by the participants during the BT period was calculated from Baseline to Week 37 and is reported in this OM.
Time frame: Baseline to Week 37
Cumulative Duration of Complete Remission With a Corticosteroids Dose <=10 mg/Day From Baseline to Week 37: PV mITT Population
Cumulative duration (in days) of CR post first CS dose of \<= 10 mg/day from Baseline to Week 37 was analyzed with a zero-inflated negative binomial model with terms of treatment group and disease history, and an offset based on the number of days on blinded treatment period and were reported in this OM. Complete remission was defined as the absence of new and established lesions and was intended to mean "no disease activity".
Time frame: Baseline to Week 37
Cumulative Duration of Complete Remission With a Corticosteroids Dose <=10 mg/Day From Baseline to Week 37: mITT Population
Cumulative duration (in days) of CR post first CS dose of \<= 10 mg/day from Baseline to Week 37 was analyzed with a zero-inflated negative binomial model with terms of treatment group and disease history, and an offset based on the number of days on blinded treatment period and were reported in this OM. Complete remission was defined as the absence of new and established lesions and was intended to mean "no disease activity".
Time frame: Baseline to Week 37
Time to First Complete Remission With a Corticosteroids Dose <=10 mg/Day From Baseline to Week 37: PV mITT Population
Time to first CR was the time (in days) to achieve CR while on CS dose of \<=10 mg/day. Complete remission was defined as the absence of new and established lesions to the "no disease activity". Kaplan-Meier method was used for the analysis.
Time frame: Baseline to Week 37
Time to First Complete Remission With a Corticosteroids Dose <=10 mg/Day From Baseline to Week 37: mITT Population
Time to first CR was the time (in days) to achieve CR while on CS dose of \<=10 mg/day. Complete remission was defined as the absence of new and established lesions to the "no disease activity". Kaplan-Meier method was used for the analysis.
Time frame: Baseline to Week 37
Percentage of Participants Who Achieved Complete Remission With a Corticosteroids Dose of <=5 mg/Day From Week 29 to Week 37: PV mITT Population
Complete remission was defined as the absence of new and established lesions and was intended to mean "no disease activity". In this OM, percentage of participants who achieved CR while on a daily corticosteroids dose of \<=5 mg/day were reported.
Time frame: From Week 29 to Week 37
Percentage of Participants Who Achieved Complete Remission With a Corticosteroids Dose of <=5 mg/Day From Week 29 to Week 37: mITT Population
Complete remission was defined as the absence of new and established lesions and was intended to mean "no disease activity". In this OM, percentage of participants who achieved CR while on a daily corticosteroids dose of \<=5 mg/day were reported.
Time frame: From Week 29 to Week 37
Percentage of Participants Who Had Pemphigus Disease Area Index (PDAI) Score <3 With a Corticosteroids Dose <=10 mg/Day From Week 29 to Week 37: PV mITT Population
PDAI is specific cutaneous and mucosal disease activity assessment performed by investigator based on evaluation of lesions in well-defined anatomical locations. The score weighted for the number and size of lesions with score of 0 (absent) to 10 given for skin (12 body locations), scalp and mucous membrane showing disease activity (erosions/blisters or new erythema). Thus, PDAI total activity score ranged from 0 to 250 points representing disease activity (120 points for skin activity; 10 points for scalp activity; 120 points for mucosal activity). Higher score indicated more disease activity. In this OM, participants with PDAI score \<3 while on a CS dose of \<=10 mg/day were reported.
Time frame: From Week 29 to Week 37
Percentage of Participants Who Had Pemphigus Disease Area Index Score <3 With a Corticosteroids Dose <=10 mg/Day From Week 29 to Week 37: mITT Population
PDAI is specific cutaneous and mucosal disease activity assessment performed by investigator based on evaluation of lesions in well-defined anatomical locations. The score weighted for the number and size of lesions with score of 0 (absent) to 10 given for skin (12 body locations), scalp and mucous membrane showing disease activity (erosions/blisters or new erythema). Thus, PDAI total activity score ranged from 0 to 250 points representing disease activity (120 points for skin activity; 10 points for scalp activity; 120 points for mucosal activity). Higher score indicated more disease activity. In this OM, participants with PDAI score \<3 while on a CS dose of \<=10 mg/day were reported.
Time frame: From Week 29 to Week 37
Cumulative Duration of Complete Remission With a Corticosteroids Dose <=10 mg/Day From Baseline to Weeks 61 and 109: PV mITT Population
Cumulative duration (in days) of CR post all doses of CS \<=10 mg/day during Baseline to Week 61 and Baseline to Week 109 were reported in this OM. Complete remission was defined as the absence of new and established lesions to the "no disease activity".
Time frame: Baseline to Week 61 and Baseline to Week 109
Cumulative Duration of Complete Remission With a Corticosteroids Dose <=10 mg/Day From Baseline to Weeks 61 and 109: mITT Population
Cumulative duration (in days) of CR post all doses of CS \<=10 mg/day during Baseline to Week 61 and Baseline to Week 109 were reported in this OM. Complete remission was defined as the absence of new and established lesions to the "no disease activity".
Time frame: Baseline to Weeks 61 and Baseline to Week 109
Cumulative Duration of Complete Remission With a Corticosteroids Dose = 0 mg/Day From Baseline to Weeks 61 and 109: PV mITT Population
Cumulative duration (in days) of CR post all doses of CS =0 mg/day during Baseline to Week 61 and Baseline to Week 109 were reported in this OM. Complete remission was defined as the absence of new and established lesions to the "no disease activity".
Time frame: Baseline to Week 61 and Baseline to Week 109
Cumulative Duration of Complete Remission With a Corticosteroids Dose = 0 mg/Day From Baseline to Weeks 61 and 109: mITT Population
Cumulative duration (in days) of CR post all doses of CS dose = 0 mg/day during Baseline to Week 61 and Baseline to Week 109 were reported in this OM. Complete remission was defined as the absence of new and established lesions to the "no disease activity".
Time frame: Baseline to Week 61 and Baseline to Week 109
Glucocorticoid Toxicity Index (GTI) - Cumulative Worsening Score (CWS) and Aggregate Improvement Score (AIS) at Week 37: PV mITT Population
GTI assessed glucocorticoid (GC) related morbidity and GC-sparing ability of other therapies; composed of 2 components: Composite GTI and specific list. Composite GTI had 9 domains and specific list had 23 items (11 domains), used as complementary tool to C-GTI. Composite GTI score:sum of 9 domain-specific scores at each visit and cumulative GTI score:sum of composite GTI scores across each visit. 2 cumulative GTI scores: CWS and AIS at Week 37 reported in this OM. CWS assessed cumulative GC toxicity regardless of whether toxicity had lasting effects/was transient. AIS assessed new therapy effectiveness in decreasing any Baseline GC toxicity over time. CWS composite score range: 0 to 439 and AIS composite score range: -346 to 439. In CWS and AIS, minimum score=least toxicity and maximum score=most toxicity. Least square (LS) mean and standard error (SE) from analysis of covariance model using treatment, disease history as fixed effects and Baseline GTI score and CS dose as covariates.
Time frame: At Week 37
Glucocorticoid Toxicity Index - Cumulative Worsening Score and Aggregate Improvement Score at Week 37: mITT Population
GTI assessed GC related morbidity and GC-sparing ability of other therapies; composed of 2 components: Composite GTI and specific list. Composite GTI contained 9 domains and specific list contained of 23 items (11 domains), used as complementary tool to C-GTI. Composite GTI score: sum of 9 domain-specific scores at each visit and cumulative GTI score: sum of composite GTI scores across each visit. Two cumulative GTI scores: CWS and AIS at Week 37 were reported in this OM. CWS assessed cumulative GC toxicity regardless of whether toxicity had lasting effects/was transient. AIS assessed new therapy effectiveness in decreasing any Baseline GC toxicity over time. CWS composite score ranged from 0 to 439 and AIS composite score ranged from -346 to 439. For CWS and AIS, minimum score = least toxicity and maximum score = most toxicity. LS mean and SE from analysis of covariance model using treatment, disease history as fixed effects and Baseline GTI score and CS dose as covariates.
Time frame: At Week 37
Change From Baseline in Pemphigus Disease Area Index Score at Weeks 5, 13, 25, 37, 61, and 109: PV mITT Population
PDAI is specific cutaneous and mucosal disease activity assessment performed by investigator based on evaluation of lesions in well-defined anatomical locations. The score weighted for the number and size of lesions with score of 0 (absent) to 10 given for skin (12 body locations), scalp and mucous membrane showing disease activity (erosions/blisters or new erythema). Thus, PDAI total activity score ranged from 0 to 250 points representing disease activity (120 points for skin activity; 10 points for scalp activity; 120 points for mucosal activity). Higher score indicated more disease activity. PDAI activity score was measured independently of the CS dose administered in the participants.
Time frame: Baseline, Weeks 5, 13, 25, 37, 61, and 109
Change From Baseline in Pemphigus Disease Area Index Score at Weeks 5, 13, 25, 37, 61, and 109: mITT Population
PDAI is specific cutaneous and mucosal disease activity assessment performed by investigator based on evaluation of lesions in well-defined anatomical locations. The score weighted for the number and size of lesions with score of 0 (absent) to 10 given for skin (12 body locations), scalp and mucous membrane showing disease activity (erosions/blisters or new erythema). Thus, PDAI total activity score ranged from 0 to 250 points representing disease activity (120 points for skin activity; 10 points for scalp activity; 120 points for mucosal activity). Higher score indicated more disease activity. PDAI activity score was measured independently of the CS dose administered in the participants.
Time frame: Baseline, Weeks 5, 13, 25, 37, 61, and 109
Change From Baseline in Autoimmune Bullous Disease Quality of Life (ABQOL) Score at Weeks 5, 13, 25, 37, 61, and 109: PV mITT Population
ABQOL, a 17-item questionnaire is a valid and reliable tool to assess quality of life in participants with autoimmune blistering diseases. Each question score ranged from 0 to 3 points, 0 = never, 1 = occasionally, 2 = sometimes and 3 = all the time, where higher score = poor QOL. The total ABQoL score was calculated by summing the score of each question and it ranged from 0 to 51, where higher score = more QOL impairment.
Time frame: Baseline, Weeks 5, 13, 25, 37, 61, and 109
Change From Baseline in Autoimmune Bullous Disease Quality of Life Score at Weeks 5, 13, 25, 37, 61, and 109: mITT Population
ABQOL, a 17-item questionnaire is a valid and reliable tool to assess quality of life in participants with autoimmune blistering diseases. Each question score ranged from 0 to 3 points, 0 = never, 1 = occasionally, 2 = sometimes and 3 = all the time, where higher score = poor QOL. The total ABQoL score was calculated by summing the score of each question and it ranged from 0 to 51, where higher score = more QOL impairment.
Time frame: Baseline, Weeks 5, 13, 25, 37, 61, and 109
Percentage of Participants With Autoimmune Bullous Disease Quality of Life Score of Zero at Weeks 5, 13, 25, 37, 61, and 109: PV mITT Population
ABQOL, a 17-item questionnaire is a valid and reliable tool to assess quality of life in participants with autoimmune blistering diseases. Each question score ranged from 0 to 3 points, 0 = never, 1 = occasionally, 2 = sometimes and 3 = all the time, where higher score = poor QOL. The total ABQoL score was calculated by summing the score of each question and it ranged from 0 to 51, where higher score = more QOL impairment. Percentage of participants with ABQOL score of '0' were reported in this outcome measure.
Time frame: At Weeks 5, 13, 25, 37, 61, and 109
Percentage of Participants With Autoimmune Bullous Disease Quality of Life Score of Zero at Weeks 5, 13, 25, 37, 61, and 109: mITT Population
ABQOL, a 17-item questionnaire is a valid and reliable tool to assess quality of life in participants with autoimmune blistering diseases. Each question score ranged from 0 to 3 points, 0 = never, 1 = occasionally, 2 = sometimes and 3 = all the time, where higher score = poor QOL. The total ABQoL score was calculated by summing the score of each question and it ranged from 0 to 51, where higher score = more QOL impairment. Percentage of participants with ABQOL score of '0' were reported in this outcome measure.
Time frame: At Weeks 5, 13, 25, 37, 61, and 109
Change From Baseline in the European Quality of Life Working Group Health Status Measure 5 Dimensions, 5 Levels (EQ-5D-5L) Score: Visual Analogue Scale (VAS) Scores at Weeks 5, 13, 25, 37, 61, and 109
EQ-5D-5L: standardized measure of health status that provides general assessment of health and wellbeing. EQ-5D VAS was used to record a participant's rating for his/her current health-related quality of life state and captured on a vertical VAS scale ranging from 0 to 100, where 0=worst imaginable health state and 100=best imaginable health state, where higher states indicated better outcomes.
Time frame: Baseline, Weeks 5, 13, 25, 37, 61, and 109
Change From Baseline in the European Quality of Life Working Group Health Status Measure 5 Dimensions, 5 Levels Score: Individual Dimension at Weeks 5, 13, 25, 37, 61, and 109
EQ-5D-5L: standardized measure of health status that provides general assessment of health and wellbeing. The EQ-5D descriptive system comprises 5 dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has a 5-level response: no problems, slight problems, moderate problems, severe problems, and extreme problems. Response options are measured with a 5-point Likert scale (for the 5L version). The 5D-5L systems are converted into a single index utility score between 0 to 1, where higher score indicates a better health state and lower score indicate worse health state.
Time frame: Baseline, Weeks 5, 13, 25, 37, 61, and 109
Time to First Complete Remission With a Corticosteroids Dose <=10 mg/Day From Baseline to Weeks 61 and 109
Time to first CR was the time (in days) to achieve CR while on a CS dose of \<=10 mg/day from Baseline to Week 61 and from Baseline to Week 109. Complete remission was defined as absence of new and established lesions to the "no disease activity".
Time frame: Baseline to Week 61 and Baseline to Week 109
Total Number of Disease Relapses/Flares From Initial Control of Disease Activity (CDA) to Week 37: PV mITT Population
Total Number of Disease Relapses/Flares which occurred from initial CDA to Week 37 were reported. CDA was defined as disappearance of new lesions cease to form and established lesions begin to heal. Relapse/flare was defined by the appearance of 3 or more new lesions after CDA and within a month that do not heal spontaneously within 1 week, or by the extension of established lesions, in a participant who had achieved CDA.
Time frame: From initial CDA up to Week 37 (i.e., during any time from Baseline up to Week 37)
Total Number of Disease Relapses/Flares From Initial Control of Disease Activity to Week 37: mITT Population
Total Number of Disease Relapses/Flares which occurred from initial CDA to Week 37 were reported. CDA was defined as disappearance of new lesions cease to form and established lesions begin to heal. Relapse/flare was defined by the appearance of 3 or more new lesions after CDA and within a month that do not heal spontaneously within 1 week, or by the extension of established lesions, in a participant who had achieved CDA.
Time frame: From initial CDA up to Week 37 (i.e., during any time from Baseline up to Week 37)
Time to Initial Relapse/Flare From Initial Control of Disease Activity to Week 37: PV mITT Population
Time duration (in days) from the time of initial relapse/flare which occurred from initial CDA up to Week 37 were reported in this OM. CDA was defined as the visit at which new lesions cease to form and established lesions begin to heal. Relapse/flare was defined by the appearance of 3 or more new lesions after CDA and within a month that do not heal spontaneously within 1 week, or by the extension of established lesions, in a participant who had achieved CDA. Kaplan-Meier method was used for the analysis.
Time frame: From initial CDA up to Week 37 (i.e., during any time from Baseline up to Week 37)
Time to Initial Relapse/Flare From Initial Control of Disease Activity to Week 37: mITT Population
Time duration (in days) from the time of initial relapse/flare which occurred from initial CDA up to Week 37 were reported in this OM. CDA was defined as the visit at which new lesions cease to form and established lesions begin to heal. Relapse/flare was defined by the appearance of 3 or more new lesions after CDA and within a month that do not heal spontaneously within 1 week, or by the extension of established lesions, in a participant who had achieved CDA. Kaplan-Meier method was used for the analysis.
Time frame: From initial CDA up to Week 37 (i.e., during any time from Baseline up to Week 37)
Percentage of Participants With 3 or More New Lesions Within 1 Month That do Not Heal Spontaneously Within 1 Week, or With Extension of Established Lesions at Week 37: PV mITT Population
Percentage of Participants With 3 or More New Lesions Within past 1 month that do not heal spontaneously within past 1 week, or with extension of established lesions, were assessed at Week 37 and reported in this OM.
Time frame: At Week 37
Percentage of Participants With 3 or More New Lesions Within 1 Month That do Not Heal Spontaneously Within 1 Week, or With Extension of Established Lesions at Week 37: mITT Population
Percentage of participants with 3 or more new lesions within past 1 month that do not heal spontaneously within past 1 week, or with extension of established lesions, were assessed at Week 37 and reported in this OM.
Time frame: At Week 37
Percentage of Participants With at Least One Disease Relapse/Flare From Initial Control of Disease Activity to Week 37: PV mITT Population
CDA was defined as the visit at which new lesions cease to form and established lesions begin to heal. Disease relapse/flare was defined by the appearance of 3 or more new lesions after CDA and within a month that do not heal spontaneously within 1 week, or by the extension of established lesions, in a participant who had achieved CDA. Percentages were calculated based on number of participants assessed (i.e. participants achieved CDA) in each treatment group. Percentage of participants with at least one disease relapse/flare from Initial CDA to Week 37 were reported in this OM.
Time frame: From initial CDA up to Week 37 (i.e., during any time from Baseline up to Week 37)
Percentage of Participants With at Least One Disease Relapse/Flare From Initial Control of Disease Activity to Week 37: mITT Population
CDA was defined as the visit at which new lesions cease to form and established lesions begin to heal. Disease relapse/flare was defined by the appearance of 3 or more new lesions after CDA and within a month that do not heal spontaneously within 1 week, or by the extension of established lesions, in a participant who had achieved CDA. Percentages were calculated based on number of participants assessed (i.e. participants achieved CDA) in each treatment group. Percentage of participants with at least one disease relapse/flare from Initial CDA to Week 37 were reported in this OM.
Time frame: From initial CDA up to Week 37 (i.e., during any time from Baseline up to Week 37)
Cumulative Duration of Complete Remission With a Corticosteroids Dose <=10 mg/Day From Week 37 to Week 61: PV mITT Population
Cumulative duration (in days) of CR post first dose of CS \<=10 mg/day from Week 37 to Week 61 were reported in this OM. Complete remission was defined as the absence of new and established lesions and was intended to mean "no disease activity".
Time frame: From Week 37 to Week 61
Cumulative Duration of Complete Remission With a Corticosteroids Dose <=10 mg/Day From Week 37 to Week 61: mITT Population
Cumulative duration (in days) of CR post first dose of CS \<=10 mg/day from Week 37 to Week 61 were reported in this OM. Complete remission was defined as the absence of new and established lesions and was intended to mean "no disease activity".
Time frame: From Week 37 to Week 61
Cumulative Duration of Complete Remission With a Corticosteroids Dose = 0 mg/Day From Week 37 to Week 61: PV mITT Population
Cumulative duration (in days) of CR post first dose of CS = 0 mg/day from Week 37 to Week 61 were reported in this OM. Complete remission was defined as the absence of new and established lesions and was intended to mean "no disease activity".
Time frame: From Week 37 to Week 61
Cumulative Duration of Complete Remission With a Corticosteroids Dose = 0 mg/Day From Week 37 to Week 61: mITT Population
Cumulative duration (in days) of CR post first dose of CS = 0 mg/day from Week 37 to Week 61 were reported in this OM. Complete remission was defined as the absence of new and established lesions and was intended to mean "no disease activity".
Time frame: From Week 37 to Week 61
Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Treatment-emergent Serious Adverse Events (TESAEs)
An adverse event (AE) was defined as any untoward medical occurrence in a participant who received study drug and does not necessarily had to have a causal relationship with the treatment. Serious AEs (SAEs) were any untoward medical occurrence that resulted in any of the following outcomes: death, life-threatening, required initial or prolonged in-patient hospitalization, persistent or significant disability/incapacity, congenital anomaly/birth defect, or considered as medically important event. TEAEs were the AEs that developed or worsened or became serious after the administration of first dose of study drug in each period.
Time frame: BT Period: From Day 1 of Week 1 to Week 37, OLE Period: from Week 37 to Week 61 and LTE Period: from Week 61 up to 4 weeks after the last dose at Week 109 (i.e., up to Week 113)
Pharmacokinetics (PK): Plasma Concentration of Rilzabrutinib
Data for this OM was not planned to be collected and analyzed for placebo arm of the study.
Time frame: Pre-dose and 2 hours post-dose on Day 1
Pharmacodynamics (PD): Change From Baseline in Antibody Levels - Anti-desmoglein 1 (Anti-dsg 1) and Anti-desmoglein 3 (Anti-dsg 3) at Weeks 13, 25, 37, 49, 61, 73, 85, 97, and 109: PV mITT Population
Anti-dsg1 and anti-dsg3 autoantibody levels was assessed by enzyme-linked immunosorbent assay (ELISA) method.
Time frame: Baseline, Weeks 13, 25, 37, 49, 61, 73, 85, 97, and 109
Pharmacodynamics: Change From Baseline in Antibody Levels - Anti-desmoglein 1 (Anti-dsg 1) and Anti-desmoglein 3 (Anti-dsg 3) at Weeks 13, 25, 37, 49, 61, 73, 85, 97 and 109: mITT Population
Anti-dsg1 and anti-dsg3 autoantibody levels was assessed by ELISA method.
Time frame: Baseline, Weeks 13, 25, 37, 49, 61, 73, 85, 97, and 109