Trial Outcomes & Findings for A Study to Evaluate the Efficacy and Safety of ESK-001 in Patients With Plaque Psoriasis (NCT NCT05600036)

NCT ID: NCT05600036

Last Updated: 2025-06-18

Results Overview

Proportion of patients with moderate to severe psoriasis achieving ≥75% reduction in PASI score

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

228 participants

Primary outcome timeframe

12 weeks

Results posted on

2025-06-18

Participant Flow

Participant milestones

Participant milestones
Measure
ESK-001 10mg QD
ESK-001 10mg tablet once a day
ESK-001 20mg QD
ESK-001 20mg tablet once a day
ESK-001 40mg QD
ESK-001 40mg tablet once a day
ESK-001 20mg BID
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
ESK-001 40mg tablet twice a day
Placebo
Placebo tablet
Overall Study
STARTED
36
36
39
40
39
38
Overall Study
COMPLETED
36
30
33
37
35
33
Overall Study
NOT COMPLETED
0
6
6
3
4
5

Reasons for withdrawal

Reasons for withdrawal
Measure
ESK-001 10mg QD
ESK-001 10mg tablet once a day
ESK-001 20mg QD
ESK-001 20mg tablet once a day
ESK-001 40mg QD
ESK-001 40mg tablet once a day
ESK-001 20mg BID
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
ESK-001 40mg tablet twice a day
Placebo
Placebo tablet
Overall Study
Adverse Event
0
2
1
0
1
0
Overall Study
Lost to Follow-up
0
2
1
1
0
0
Overall Study
Protocol Violation
0
0
2
0
0
0
Overall Study
Withdrawal by Subject
0
1
2
0
3
5
Overall Study
Discontinued Prior to Dosing Due to the Blood Sample Logistics
0
0
0
1
0
0
Overall Study
Subject Can't Continue With Week 16 Visit
0
1
0
0
0
0
Overall Study
The Patient was Terminated From The Study Due to Sponsor Requirements
0
0
0
1
0
0

Baseline Characteristics

A Study to Evaluate the Efficacy and Safety of ESK-001 in Patients With Plaque Psoriasis

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
ESK-001 10mg QD
n=36 Participants
ESK-001 10mg tablet once a day
ESK-001 20mg QD
n=36 Participants
ESK-001 20mg tablet once a day
ESK-001 40mg QD
n=39 Participants
ESK-001 40mg tablet once a day
ESK-001 20mg BID
n=40 Participants
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
n=39 Participants
ESK-001 40mg tablet twice a day
Placebo
n=38 Participants
Placebo tablet
Total
n=228 Participants
Total of all reporting groups
Age, Categorical
<=18 years
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=10 Participants
0 Participants
n=115 Participants
Age, Categorical
Between 18 and 65 years
33 Participants
n=5 Participants
33 Participants
n=7 Participants
37 Participants
n=5 Participants
35 Participants
n=4 Participants
33 Participants
n=21 Participants
35 Participants
n=10 Participants
206 Participants
n=115 Participants
Age, Categorical
>=65 years
3 Participants
n=5 Participants
3 Participants
n=7 Participants
2 Participants
n=5 Participants
5 Participants
n=4 Participants
6 Participants
n=21 Participants
3 Participants
n=10 Participants
22 Participants
n=115 Participants
Age, Continuous
48.8 years
STANDARD_DEVIATION 12.7 • n=5 Participants
43.9 years
STANDARD_DEVIATION 11.99 • n=7 Participants
49.5 years
STANDARD_DEVIATION 10.45 • n=5 Participants
47.7 years
STANDARD_DEVIATION 12.52 • n=4 Participants
47.9 years
STANDARD_DEVIATION 14.17 • n=21 Participants
49.1 years
STANDARD_DEVIATION 11.67 • n=10 Participants
47.8 years
STANDARD_DEVIATION 12.3 • n=115 Participants
Sex: Female, Male
Female
12 Participants
n=5 Participants
12 Participants
n=7 Participants
13 Participants
n=5 Participants
17 Participants
n=4 Participants
13 Participants
n=21 Participants
7 Participants
n=10 Participants
74 Participants
n=115 Participants
Sex: Female, Male
Male
24 Participants
n=5 Participants
24 Participants
n=7 Participants
26 Participants
n=5 Participants
23 Participants
n=4 Participants
26 Participants
n=21 Participants
31 Participants
n=10 Participants
154 Participants
n=115 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
7 Participants
n=5 Participants
14 Participants
n=7 Participants
13 Participants
n=5 Participants
7 Participants
n=4 Participants
11 Participants
n=21 Participants
13 Participants
n=10 Participants
65 Participants
n=115 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
29 Participants
n=5 Participants
21 Participants
n=7 Participants
26 Participants
n=5 Participants
33 Participants
n=4 Participants
28 Participants
n=21 Participants
24 Participants
n=10 Participants
161 Participants
n=115 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
1 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
1 Participants
n=10 Participants
2 Participants
n=115 Participants
Race/Ethnicity, Customized
American Indian or Alaska Native
0 Participants
n=5 Participants
1 Participants
n=7 Participants
1 Participants
n=5 Participants
0 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=10 Participants
2 Participants
n=115 Participants
Race/Ethnicity, Customized
Asian
1 Participants
n=5 Participants
2 Participants
n=7 Participants
2 Participants
n=5 Participants
2 Participants
n=4 Participants
2 Participants
n=21 Participants
4 Participants
n=10 Participants
13 Participants
n=115 Participants
Race/Ethnicity, Customized
Native Hawaiian or Pacific Islander
1 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
2 Participants
n=4 Participants
0 Participants
n=21 Participants
0 Participants
n=10 Participants
3 Participants
n=115 Participants
Race/Ethnicity, Customized
Black or African American
4 Participants
n=5 Participants
0 Participants
n=7 Participants
1 Participants
n=5 Participants
1 Participants
n=4 Participants
1 Participants
n=21 Participants
3 Participants
n=10 Participants
10 Participants
n=115 Participants
Race/Ethnicity, Customized
White
30 Participants
n=5 Participants
31 Participants
n=7 Participants
33 Participants
n=5 Participants
34 Participants
n=4 Participants
33 Participants
n=21 Participants
27 Participants
n=10 Participants
188 Participants
n=115 Participants
Race/Ethnicity, Customized
Other
0 Participants
n=5 Participants
2 Participants
n=7 Participants
2 Participants
n=5 Participants
1 Participants
n=4 Participants
1 Participants
n=21 Participants
4 Participants
n=10 Participants
10 Participants
n=115 Participants
Race/Ethnicity, Customized
Unknown or Not Reported
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
2 Participants
n=21 Participants
0 Participants
n=10 Participants
2 Participants
n=115 Participants

PRIMARY outcome

Timeframe: 12 weeks

Population: All Randomized and Treated Participants

Proportion of patients with moderate to severe psoriasis achieving ≥75% reduction in PASI score

Outcome measures

Outcome measures
Measure
ESK-001 10mg QD
n=36 Participants
ESK-001 10mg tablet once a day
ESK-001 20mg QD
n=36 Participants
ESK-001 20mg tablet once a day
ESK-001 40mg QD
n=39 Participants
ESK-001 40mg tablet once a day
ESK-001 20mg BID
n=39 Participants
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
n=39 Participants
ESK-001 40mg tablet twice a day
Placebo
n=38 Participants
Placebo tablet
To Compare the Psoriasis Area and Severity Index (PASI-75) Between Doses of ESK-001 and Placebo
19.4 Percentage
Interval 8.2 to 36.0
33.3 Percentage
Interval 18.6 to 51.0
56.4 Percentage
Interval 39.6 to 72.2
56.4 Percentage
Interval 36.6 to 72.2
64.1 Percentage
Interval 47.2 to 78.8
0 Percentage
Interval 0.0 to 9.3

SECONDARY outcome

Timeframe: 12 weeks

Population: Safety Analysis Set

Incidence of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs). See Adverse Events section.

Outcome measures

Outcome measures
Measure
ESK-001 10mg QD
n=36 Participants
ESK-001 10mg tablet once a day
ESK-001 20mg QD
n=36 Participants
ESK-001 20mg tablet once a day
ESK-001 40mg QD
n=39 Participants
ESK-001 40mg tablet once a day
ESK-001 20mg BID
n=39 Participants
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
n=39 Participants
ESK-001 40mg tablet twice a day
Placebo
n=38 Participants
Placebo tablet
To Assess the Safety and Tolerability of ESK-001 Dose in Moderate to Severe Psoriasis Patients
19 Participants
14 Participants
19 Participants
18 Participants
25 Participants
15 Participants

SECONDARY outcome

Timeframe: 12 weeks

Population: mITT population

Proportion of patients achieving an sPGA score of "0" ("cleared") or "1" ("minimal")

Outcome measures

Outcome measures
Measure
ESK-001 10mg QD
n=36 Participants
ESK-001 10mg tablet once a day
ESK-001 20mg QD
n=36 Participants
ESK-001 20mg tablet once a day
ESK-001 40mg QD
n=39 Participants
ESK-001 40mg tablet once a day
ESK-001 20mg BID
n=39 Participants
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
n=39 Participants
ESK-001 40mg tablet twice a day
Placebo
n=38 Participants
Placebo tablet
To Assess the Response Rate in Static Physician's Global Assessment (sPGA) Score
6 Participants
14 Participants
21 Participants
19 Participants
23 Participants
3 Participants

SECONDARY outcome

Timeframe: 14 weeks

Population: PK Analysis Set

Plasma concentrations and PK parameters of ESK-001.

Outcome measures

Outcome measures
Measure
ESK-001 10mg QD
n=36 Participants
ESK-001 10mg tablet once a day
ESK-001 20mg QD
n=36 Participants
ESK-001 20mg tablet once a day
ESK-001 40mg QD
n=39 Participants
ESK-001 40mg tablet once a day
ESK-001 20mg BID
n=39 Participants
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
n=39 Participants
ESK-001 40mg tablet twice a day
Placebo
n=38 Participants
Placebo tablet
To Characterize the Pharmacokinetics (PK) of ESK-001
11.9 ng/ml
Standard Deviation 12.4
33.0 ng/ml
Standard Deviation 49.9
50.7 ng/ml
Standard Deviation 44.8
63.9 ng/ml
Standard Deviation 44.8
174.0 ng/ml
Standard Deviation 125.0
2.9 ng/ml
Standard Deviation 10.5

Adverse Events

ESK-001 10mg QD

Serious events: 1 serious events
Other events: 8 other events
Deaths: 0 deaths

ESK-001 20mg QD

Serious events: 0 serious events
Other events: 4 other events
Deaths: 0 deaths

ESK-001 40mg QD

Serious events: 1 serious events
Other events: 11 other events
Deaths: 0 deaths

ESK-001 20mg BID

Serious events: 3 serious events
Other events: 18 other events
Deaths: 0 deaths

ESK-001 40mg BID

Serious events: 0 serious events
Other events: 18 other events
Deaths: 0 deaths

Placebo

Serious events: 0 serious events
Other events: 9 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
ESK-001 10mg QD
n=36 participants at risk
ESK-001 10mg tablet once a day
ESK-001 20mg QD
n=36 participants at risk
ESK-001 20mg tablet once a day
ESK-001 40mg QD
n=39 participants at risk
ESK-001 40mg tablet once a day
ESK-001 20mg BID
n=39 participants at risk
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
n=39 participants at risk
ESK-001 40mg tablet twice a day
Placebo
n=38 participants at risk
Placebo tablet
Injury, poisoning and procedural complications
Lower limb fracture
2.8%
1/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Injury, poisoning and procedural complications
Tibia fracture
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Cardiac disorders
Coronary artery occlusion
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Gastrointestinal disorders
Colitis
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Gastrointestinal disorders
Enteritis
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Skin and subcutaneous tissue disorders
Dermatitis contact
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).

Other adverse events

Other adverse events
Measure
ESK-001 10mg QD
n=36 participants at risk
ESK-001 10mg tablet once a day
ESK-001 20mg QD
n=36 participants at risk
ESK-001 20mg tablet once a day
ESK-001 40mg QD
n=39 participants at risk
ESK-001 40mg tablet once a day
ESK-001 20mg BID
n=39 participants at risk
ESK-001 20mg tablet twice a day
ESK-001 40mg BID
n=39 participants at risk
ESK-001 40mg tablet twice a day
Placebo
n=38 participants at risk
Placebo tablet
Infections and infestations
Upper respiratory tract infection
5.6%
2/36 • Adverse Event data was collected from Screening through end of study (Week 16).
5.6%
2/36 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
7.7%
3/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Infections and infestations
Nasopharyngitis
5.6%
2/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
7.7%
3/39 • Adverse Event data was collected from Screening through end of study (Week 16).
7.9%
3/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Infections and infestations
COVID-19
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
7.9%
3/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Nervous system disorders
Headache
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
5.6%
2/36 • Adverse Event data was collected from Screening through end of study (Week 16).
10.3%
4/39 • Adverse Event data was collected from Screening through end of study (Week 16).
7.7%
3/39 • Adverse Event data was collected from Screening through end of study (Week 16).
7.7%
3/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.3%
2/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Nervous system disorders
Dizziness
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Gastrointestinal disorders
Diarrhea
2.8%
1/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Gastrointestinal disorders
Dyspepsia
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Gastrointestinal disorders
Nausea
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Skin and subcutaneous tissue disorders
Acne
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Skin and subcutaneous tissue disorders
Dermatitis acneiform
2.8%
1/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Respiratory, thoracic and mediastinal disorders
Cough
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
General disorders
Pyrexia
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
5.1%
2/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).
Metabolism and nutrition disorders
Diabetes mellitus
5.6%
2/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/36 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
2.6%
1/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/39 • Adverse Event data was collected from Screening through end of study (Week 16).
0.00%
0/38 • Adverse Event data was collected from Screening through end of study (Week 16).

Additional Information

SVP, Development Operations

Alumis Inc.

Phone: (650) 231-6625

Results disclosure agreements

  • Principal investigator is a sponsor employee Investigator may publish after the earlier of: publication of the final multicenter publication or 24 months after completion of the Study. Investigator will provide to Sponsor a copy of any publication at least 60 days prior to submission. Sponsor may delete any confidential or proprietary information of Sponsor from the publication. Investigator will delay any publication an additional 90 days if requested to enable Sponsor to secure patent protection.
  • Publication restrictions are in place

Restriction type: OTHER