Study to Evaluate the Safety and Efficacy of JTE-051 in Subjects With Moderate to Severe Plaque Psoriasis

The psoriasis area and severity index (PASI) combines the assessment of the severity of lesions (scaling, redness and plaque thickness) and the area affected into a single score in the range of 0.0 (no disease) to 72.0 (maximal disease). The body is divided into four sections: (1) Head and neck; (2) Upper limbs; (3) Trunk (including axillae and groin); and (4) Lower limbs (including buttocks). The PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis. The PASI-75 response rate is defined as at least 75 percent (%) reduction in PASI score relative to Baseline.

Time frame: Up to 12 Weeks

Population: Randomized subjects with available data at EOT (measurement at EOT is the last post-baseline measurement up to Week 12). Of the 13 randomized subjects, 1 subject in the JTE-051 150 mg group did not have any post-baseline data. Therefore, 12 subjects were included in the PASI-75 analysis at EOT.

The sPGA of psoriasis is scored on a 5-point scale, reflecting a global consideration of the redness, thickness and scaling across all psoriatic lesions. Average redness, thickness and scaling are scored separately over the whole body according to a 5-point severity scale (0 \[no symptom\] to 4 \[severe symptom\]). The total score is calculated as average of the 3 severity (redness, thickness and scaling) scores and rounded to the nearest whole number score to determine the sPGA score (0=cleared; 1=minimal; 2=mild; 3=moderate; and 4=severe). Change from baseline to Week 12 in sPGA was calculated by taking the Week 12 sPGA and subtracting the baseline sPGA.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

Skindex-16 questionnaire contains 16 questions related to quality of life in subjects with skin disease. It consists of a short 16-item assessment completed by the subject, with each item rated on a 7-point Likert scale (0=never bothered to 6=always bothered). Each raw score is multiplied by 16.667 to transform all responses to a linear scale from 0 (no effect) to 100 (effect experienced all the time). Responses to the Skindex-16 are categorized into 3 subscales: symptom, emotional & functional; their respective scores are expressed in a linear scale from 0 to 100. Emotions scale score is an average of items 5 to 11 expressed in a linear scale from 0 to 100. Change from baseline to Week 12 in the Skindex-16 Emotions Scale Score was calculated by taking the Week 12 Skindex-16 Emotions Scale Score and subtracting the baseline Skindex-16 Emotions Scale Score. A negative change from baseline at Week 12 indicates an improvement in the subject's condition compared to the baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

Skindex-16 questionnaire contains 16 questions related to quality of life in subjects with skin disease. It consists of a short 16-item assessment completed by the subject, with each item rated on a 7-point Likert scale (0=never bothered to 6=always bothered). Each raw score is multiplied by 16.667 to transform responses to a linear scale from 0 (no effect) to 100 (effect experienced all the time). Responses to the Skindex-16 are categorized into 3 subscales: symptom, emotional & functional; their respective scores are expressed in a linear scale from 0 to 100. Functioning scale score is an average of items 12 to 16 expressed in a linear scale from 0 to 100. Change from baseline to Week 12 in the Skindex-16 Functioning Scale Score was calculated by taking the Week 12 Skindex-16 Functioning Scale Score and subtracting the baseline Skindex-16 Functioning Scale Score. A negative change from baseline at Week 12 indicates an improvement in the subject's condition compared to the baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

Skindex-16 questionnaire contains 16 questions related to quality of life in subjects with skin disease. It consists of a short 16-item assessment completed by the subject, with each item rated on a 7-point Likert scale (0=never bothered to 6=always bothered). Each raw score is multiplied by 16.667 to transform all responses to a linear scale from 0 (no effect) to 100 (effect experienced all the time). Responses to the Skindex-16 are categorized into 3 subscales: symptom, emotional & functional; their respective scores are expressed in a linear scale from 0 to 100. Overall scale score is an average of 16 items expressed in a linear scale from 0 to 100. Change from baseline to Week 12 in the Skindex-16 Overall Score was calculated by taking the Week 12 Skindex-16 Overall Score and subtracting the baseline Skindex-16 Overall Score. A negative change from baseline at Week 12 indicates an improvement in the subject's condition compared to the baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

Skindex-16 questionnaire contains 16 questions related to quality of life in subjects with skin disease. It consists of a short 16-item assessment completed by the subject, with each item rated on a 7-point Likert scale (0=never bothered to 6=always bothered). Each raw score is multiplied by 16.667 to transform all responses to a linear scale from 0 (no effect) to 100 (effect experienced all the time). Responses to the Skindex-16 are categorized into 3 subscales: symptom, emotional & functional; their respective scores are expressed in a linear scale from 0 to 100. Symptoms scale score is an average of items 1 to 4 expressed in a linear scale from 0 to 100. Change from baseline to Week 12 in the Skindex-16 Symptoms Scale Score was calculated by taking the Week 12 Skindex-16 Symptoms Scale Score and subtracting the baseline Skindex-16 Symptoms Scale Score. A negative change from baseline at Week 12 indicates an improvement in the subject's condition compared to the baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

Trough plasma concentration is the measured concentration at the end of a dosing interval at steady state (taken directly before next administration). Blood samples were collected at specific timepoints to measure trough plasma concentrations of JTE-051 in the subjects randomized to JTE-051 treatment groups.

Time frame: Week 12

Population: Subjects randomized to JTE-051 treatment groups with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

Subjects in the Safety Population (13, subjects who were randomly assigned to treatment and who received at least one dose of study drug). The study was terminated early as per the Sponsor decision. All randomized subjects were included in the Safety Population.

Time frame: Up to 16 Weeks

Population: Subjects in the Safety Population (subjects who were randomly assigned to treatment and who received at least one dose of study drug).

The psoriasis area and severity index (PASI) combines the assessment of the severity of lesions (scaling, redness and plaque thickness) and the area affected into a single score in the range of 0.0 (no disease) to 72.0 (maximal disease). The body is divided into four sections: (1) Head and neck; (2) Upper limbs; (3) Trunk (including axillae and groin); and (4) Lower limbs (including buttocks). The PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis. Percent change was calculated by taking the Week 12 PASI score and subtracting the baseline PASI, and dividing by the baseline PASI, then multiplying by 100 to get the percent change from baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

The total body surface area (BSA) affected by plaque-type psoriasis was obtained from the percentages of areas affected, including head, trunk, upper limbs and lower limbs. Each reported percentage was multiplied by its respective body region corresponding factor (head=0.1, upper limbs=0.2, trunk=0.3, lower limbs=0.4) and the resulting 4 values were added up to obtain the total psoriasis BSA (Range: 0 to 100). BSA (%)=0.1Sh + 0.2Sh+0.3St+0.4Sl, where S=body region surface area with psoriasis: h=head; u=upper limbs; t=trunk; l=lower limbs. Percent change from baseline to Week 12 in BSA was calculated by taking the Week 12 BSA and subtracting the baseline BSA, then dividing by the baseline BSA and multiplying by 100. A negative change from baseline at Week 12 indicates a reduction in the Psoriasis BSA compared to the baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

The psoriasis area and severity index (PASI) combines the assessment of the severity of lesions (scaling, redness and plaque thickness) and the area affected into a single score in the range of 0.0 (no disease) to 72.0 (maximal disease). The body is divided into four sections: (1) Head and neck; (2) Upper limbs; (3) Trunk (including axillae and groin); and (4) Lower limbs (including buttocks). The PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis. The PASI-100 response rate is defined as 100 percent (%) reduction in PASI score relative to Baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

The psoriasis area and severity index (PASI) combines the assessment of the severity of lesions (scaling, redness and plaque thickness) and the area affected into a single score in the range of 0.0 (no disease) to 72.0 (maximal disease). The body is divided into four sections: (1) Head and neck; (2) Upper limbs; (3) Trunk (including axillae and groin); and (4) Lower limbs (including buttocks). The PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis. The PASI-50 response rate is defined as at least 50 percent (%) reduction in PASI score relative to Baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

The psoriasis area and severity index (PASI) combines the assessment of the severity of lesions (scaling, redness and plaque thickness) and the area affected into a single score in the range of 0.0 (no disease) to 72.0 (maximal disease). The body is divided into four sections: (1) Head and neck; (2) Upper limbs; (3) Trunk (including axillae and groin); and (4) Lower limbs (including buttocks). The PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis. The PASI-90 response rate is defined as at least 90 percent (%) reduction in PASI score relative to Baseline.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).

The sPGA of psoriasis is scored on a 5-point scale, reflecting a global consideration of the redness, thickness and scaling across all psoriatic lesions. Average redness, thickness and scaling are scored separately over the whole body according to a 5-point severity scale (0 \[no symptom\] to 4 \[severe symptom\]). The total score is calculated as average of the 3 severity (redness, thickness and scaling) scores and rounded to the nearest whole number score to determine the sPGA score (0=cleared; 1=minimal; 2=mild; 3=moderate; and 4=severe). For this outcome measure, a score of 0 means no symptoms of psoriasis and a score of 1 means minimal symptoms of psoriasis.

Time frame: Week 12

Population: Randomized subjects with available data at Week 12. For the JTE-051 200 mg group, number of participants analyzed is 2 (1 subject completed the study and 1 subject did not complete the study but had available Week 12 data).