A Phase 2 Study Investigating the Effect of EDP1815 in the Treatment of Mild to Moderate Plaque Psoriasis

A Phase 2, Multicenter, Randomized, Double-Blind, Placebo-Controlled, Parallel-Cohort, Dose-Ranging Study Investigating the Effect of EDP1815 in the Treatment of Mild to Moderate Plaque Psoriasis

This Phase 2 study has been designed to investigate the clinical safety and efficacy of EDP1815 and to identify an optimal dose in subjects with mild to moderate psoriasis.

Study Overview

• Status: Completed
• Conditions: Psoriasis; Plaque Psoriasis
• Intervention / Treatment: Drug: Placebo; Drug: EDP1815

Detailed Description

This is a multicenter, randomized, double-blind, placebo-controlled, parallel-cohort, dose-ranging study of participants with mild to moderate plaque psoriasis. This Phase 2 study has been designed to investigate the clinical safety and efficacy of EDP1815 and to identify an optimal dose in subjects with mild to moderate psoriasis.

• Study Type: Interventional
• Enrollment (Actual): 249
• Phase: Phase 2

Contacts and Locations

Study Locations

• Hungary
  • Budapest, Hungary, 1036
    • Synexus Budapest - Magyarország Egészségügyi Szolgáltató Kft
  • Zalaegerszeg, Hungary, 8900
    • Synexus Zalaegerszeg Magyarország Egészségügyi Kft
• Poland
  • Czestochowa, Poland, 42-202
    • Synexus - Częstochowa
  • Katowice, Poland, 40-040
    • Synexus - Katowice
  • Warszawa, Poland, 01-192
    • Synexus - Warszawa
  • Łódź, Poland
    • Synexus - Lodz
  • Dolnoslaskie
    • Wrocław, Dolnoslaskie, Poland, 50-088
      • Synexus - Wroclaw
  • Pomorskie
    • Gdańsk, Pomorskie, Poland, 80-382
      • Synexus - Gdansk
    • Gdynia, Pomorskie, Poland, 81-537
      • Synexus - Gdynia
  • Wielkopolskie
    • Poznań, Wielkopolskie, Poland, 60-702
      • Synexus - Poznań
• United Kingdom
  • Glasgow, United Kingdom, G20 0SP
    • Synexus - Scotland Clinical Research Centre
  • Manchester, United Kingdom, M15 6SE
    • Synexus - Manchester Clinical Research Centre
  • Berkshire
    • Reading, Berkshire, United Kingdom, RG2 0TG
      • Synexus - Thames Valley Clinical Research Centre
  • Lancashire
    • Blackpool, Lancashire, United Kingdom, FY2 0JH
      • MAC Clinical Research
    • Chorley, Lancashire, United Kingdom, PR7 7NA
      • Synexus - Lancashire Clinical Research Centre
  • Liverpool
    • Waterloo, Liverpool, United Kingdom, L22 0LG
      • Synexus - Merseyside Clinical Research Centre
  • Manchester
    • Wythenshawe, Manchester, United Kingdom, M23 9QZ
      • Medicine Evaluation Unit
  • North Yorkshire
    • Stockton-on-Tees, North Yorkshire, United Kingdom, TS17 6EW
      • MAC Clinical Research
  • Staffordshire
    • Cannock, Staffordshire, United Kingdom, WS11 0BN
      • MAC Clinical Research
  • Wales
    • Cardiff, Wales, United Kingdom, CF15 9SS
      • Synexus - Wales Clinical Research Centre
  • West Yorkshire
    • Leeds, West Yorkshire, United Kingdom, LS10 1DU
      • MAC Clinical Research
• United States
  • California
    • Santa Rosa, California, United States, 95405
      • Synexus Clinical Research US, Inc. - Santa Rosa
  • Florida
    • Orlando, Florida, United States, 32806
      • Synexus Clinical Research US, Inc. - Orlando
    • Saint Petersburg, Florida, United States, 33781
      • Synexus Clinical Research US, Inc. - St. Petersburg
    • Tampa, Florida, United States, 33624
      • ForCare Clinical Research
    • The Villages, Florida, United States, 32162
      • Synexus Clinical Research US, Inc. - The Villages
  • Ohio
    • Cincinnati, Ohio, United States, 45236
      • Synexus Clinical Research US, Inc. - Cincinnati
  • Oregon
    • Portland, Oregon, United States, 97223
      • Oregon Medical Research Center PC
  • South Carolina
    • Anderson, South Carolina, United States, 29621
      • Synexus Clinical Research US, Inc. - Anderson

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 70 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Key Inclusion Criteria:

1. Males or females ≥18 and ≤70 years old at the time of informed consent.
2. A documented diagnosis of plaque psoriasis for ≥6 months.

3. Have mild to moderate plaque psoriasis with plaque covering body surface area (BSA) of ≥3% and ≤10% and meet both of the following additional criteria:

   1. PASI score of ≥6 and ≤15, and
   2. PGA score of 2 or 3.

Key Exclusion Criteria:

1. Have a diagnosis of non-plaque psoriasis.
2. Plaque psoriasis restricted to scalp, palms, and soles only.
3. Have received systemic immunosuppressive therapy (MTX, apremilast, azathioprine, cyclosporine, 6-thioguanine, mercaptopurine, mycophenolate mofetil, hydroxyurea, and tacrolimus) within 4 weeks of first administration of study drug.
4. Unresponsive to prior use of biologics (including, but not limited to, TNFα inhibitors, natalizumab, efalizumab, anakinra or agents that modulate B cells or T cells).
5. If prior biologic therapy and responsive, participants must have been off therapy for at least 12 months prior to first administration of study drug.
6. Have received phototherapy or any systemic medications/treatments that could affect psoriasis or PGA evaluation (including, but not limited to oral or injectable corticosteroids, retinoids, psoralens, sulfasalazine, hydroxyurea, or fumaric acid derivatives) within 4 weeks of first administration of study drug. This includes therapeutic doses of non-steroidal anti-inflammatory drugs such as ibuprofen, although intermittent as required use as an analgesic is permitted when required. Chronic use of low dose aspirin for cardiovascular protection is permitted.
7. Currently receiving lithium, antimalarials, leflunomide, or IM gold, or have received lithium, antimalarials, IM gold, or leflunomide within 4 weeks of first administration of study drug.
8. Have used topical medications/treatments that could affect psoriasis or PGA evaluation (including [but not limited to] high- and mid-potency corticosteroids, anthralin, calcipotriene, topical vitamin D derivatives, retinoids, tazarotene, methoxsalen, trimethylpsoralens, picrolimus, and tacrolimus) within 2 weeks of the first administration of study drug. Topical unmedicated emollients and low-potency topical corticosteroids are not excluded.
9. Gastrointestinal tract disease (eg, short-bowel syndrome, diarrhea-predominant irritable bowel syndrome) that could interfere with GI delivery and transit time.
10. Active inflammatory bowel disease.
11. Active infection requiring systemic antiviral or antimicrobial therapy that will not be completed prior to Day 1 (Visit 2).
12. Have received live or live attenuated replicating vaccine within 6 weeks prior to screening or intend to have such a vaccination during the study.
13. Clinically significant abnormalities in screening laboratory values that would render a participant unsuitable for inclusion (per investigator judgment).
14. Known history of or positive test for HIV, or active infection with hepatitis C or chronic hepatitis B.
15. History of clinically significant acute cardiac or cerebrovascular event within 6 months before screening (includes stroke, transient ischemic attack, and coronary heart disease [angina pectoris, myocardial infarction, heart failure, revascularization procedures]).
16. Current acute or chronic inflammatory disease other than psoriasis or psoriatic arthritis (eg, inflammatory bowel disease, rheumatoid arthritis, systemic lupus erythematosus). If a subject is off all treatment and is disease and has been symptom free for greater than 12 months, then the inflammatory disease is considered to be in remission and they may be enrolled.
17. Hypersensitivity to P histicola or to any of the excipients.
18. Active untreated mental or psychiatric disorder. Participants who are on stable dosing of medication for a mental or psychiatric disorder for at least 6 months before screening and whose treating physicians consider them to be mentally stable may be enrolled.
19. Any major or minor GI surgery within 6 months of screening.
20. Any major surgery within 6 months of screening.
21. Malignancy within 5 years, except for basal or squamous cell carcinoma of the skin or carcinoma in situ of the cervix that has been successfully treated.
22. Treatment with another investigational drug, biological agent, or device within 1 month of screening, or 5 half-lives of investigational agent, whichever is longer.
23. Initiating any OTC or prescription medication including vitamins, herbal supplements and nutraceuticals (eg, supplements including high doses of probiotics and prebiotics as usually found in capsules/tablets/powders), except acetaminophen/paracetamol and anti-histamines, within 14 days prior to baseline or anticipates change in dosage for the duration of the study period. Note that probiotic and prebiotic foods that contain low doses are allowed (eg, yoghurt, kefir, kombucha, however, supplements containing high doses of probiotics and prebiotics are not allowed at any point during the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Cohort 1; 75 subjects with mild to moderate psoriasis; 50 on EDP1815, 25 on placebo. Dose = 0.8 x 10^11 cells, capsule, once daily, 16 weeks	Drug: Placebo; Placebo oral capsule; Drug: EDP1815; EDP1815 is an orally administered, pharmaceutical preparation of a single strain of bacteria
Experimental: Cohort 2; 75 subjects with mild to moderate psoriasis; 50 on EDP1815, 25 on placebo. Dose = 3.2 x 10^11 cells, capsule, once daily, 16 weeks	Drug: Placebo; Placebo oral capsule; Drug: EDP1815; EDP1815 is an orally administered, pharmaceutical preparation of a single strain of bacteria
Experimental: Cohort 3; 75 subjects with mild to moderate psoriasis; 50 on EDP1815, 25 on placebo. Dose = 8.0 x 10^11 cells, capsule, once daily, 16 weeks	Drug: Placebo; Placebo oral capsule; Drug: EDP1815; EDP1815 is an orally administered, pharmaceutical preparation of a single strain of bacteria

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Mean Percentage Change in PASI	The Psoriasis Area and Severity Index Score (PASI) is a physician assessment that combines the assessment of the severity of and area affected by psoriasis into a single score in the range 0 (no disease) to 72 (maximal disease).The efficacy of EDP1815 will be measured using the mean percentage change in PASI from baseline to week 16.	16 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Mean Percentage Change in PASI	The Psoriasis Area and Severity Index Score (PASI) is a physician assessment that combines the assessment of the severity of and area affected by psoriasis into a single score in the range 0 (no disease) to 72 (maximal disease). The efficacy of EDP1815 will be measured using the mean percentage change from baseline in PASI from baseline at weeks 4, 8, and 12.	12 weeks
Mean Absolute Change in PASI	The Psoriasis Area and Severity Index Score (PASI) is a physician assessment that combines the assessment of the severity of and area affected by psoriasis into a single score in the range 0 (no disease) to 72 (maximal disease). The efficacy of EDP1815 will be measured using the mean absolute change from baseline in PASI from baseline at weeks 4, 8, 12, and 16.	16 weeks
Achievement of PASI-50	The efficacy of EDP1815 will be measured using the achievement of PASI-50 at weeks 4, 8, 12, and 16. PASI-50 is defined by at least a 50% reduction from baseline in the PASI score.	16 weeks
Time to First Achievement of PASI-50	The efficacy of EDP1815 will be measured using the time to first achievement of PASI-50	20 weeks
Achievement of PASI-75	The efficacy of EDP1815 will be measured using the achievement of PASI-75 at week 16. PASI-75 response is defined by at least a 75% reduction from baseline in the PASI score.	16 weeks
Achievement of PASI-90	The efficacy of EDP1815 will be measured using the achievement of PASI-90 at week 16.PASI-90 response is defined by at least a 90% reduction from baseline in the PASI score.	16 weeks
Achievement of PASI-100	The efficacy of EDP1815 will be measured using the achievement of PASI-100 at week 16. PASI-100 response is defined as achieving a complete resolution of all disease.	16 weeks
Achievement of PGA of 0 or 1 With a ≥2-point Improvement From Baseline	The efficacy of EDP1815 will be measured using the achievement of PGA of 0 or 1 with a ≥2-point improvement from baseline at Week 16 [PGA = Physician's Global Assessment]. The National Psoriasis Foundation Psoriasis Score version of a PGA is calculated by averaging the total body erythema, induration, and desquamation scores. Erythema, induration, and desquamation will be scored on a 6-point scale, ranging from 0 (clear) to 5 (severe): the total PGA score is defined as the average of the erythema, induration, and desquamation scores. PGA score of 0 or 1 is defined as clear or almost clear of psoriasis.	16 weeks
Achievement of PGA of 0	The efficacy of EDP1815 will be measured using the achievement of PGA of 0 at Week 16 [PGA = Physician's Global Assessment]. The National Psoriasis Foundation Psoriasis Score version of a PGA is calculated by averaging the total body erythema, induration, and desquamation scores. Erythema, induration, and desquamation will be scored on a 6-point scale, ranging from 0 (clear) to 5 (severe): the total PGA score is defined as the average of the erythema, induration, and desquamation scores. PGA score of 0 or 1 is defined as clear or almost clear of psoriasis. A PGA 0 is defined as clear or no signs of psoriasis.	16 weeks
Mean Percentage Change in PGAxBSA	[PGA = Physician's Global Assessment, BSA = Body Surface Area]. The National Psoriasis Foundation Psoriasis Score version of a static Physicians Global Asessment (PGA) is calculated by averaging the total body erythema, induration, and desquamation scores. Erythema, induration, and desquamation will be scored on a 6-point scale, ranging from 0 (clear) to 5 (severe): the total PGA score is defined as the average of the erythema, induration, and desquamation scores. Body surface area (BSA) measures the total area of the body affected by psoriasis. Psoriasis that occurs on less than 5 percent of the BSA is considered mild to moderate psoriasis. Psoriasis affecting more than 5 percent of the BSA is considered moderate to severe psoriasis. The efficacy of EDP1815 will be measured using the mean percentage change from baseline in PGA x BSA at Weeks 4, 8, 12, and 16.	16 weeks
Mean Absolute Change in PGAxBSA	[PGA = Physician's Global Assessment, BSA = Body Surface Area]. The National Psoriasis Foundation Psoriasis Score version of a static Physicians Global Asessment (PGA) is calculated by averaging the total body erythema, induration, and desquamation scores. Erythema, induration, and desquamation will be scored on a 6-point scale, ranging from 0 (clear) to 5 (severe): the total PGA score is defined as the average of the erythema, induration, and desquamation scores. Body surface area (BSA) measures the total area of the body affected by psoriasis. Psoriasis that occurs on less than 5 percent of the BSA is considered mild to moderate psoriasis. Psoriasis affecting more than 5 percent of the BSA is considered moderate to severe psoriasis. The efficacy of EDP1815 will be measured using the mean absolute change from baseline in PGA x BSA at Weeks 4, 8, 12, and 16.	16 weeks
Mean Percentage Change in LSS	The LSS is used to score the severity of psoriasis plaques. The dimensions of scaling, erythema, and plaque elevation are each scored on a scale from 0 (clear) to 4 (very severe), and the total LSS is the numerical sum of the 3-dimensional scores. The efficacy of EDP1815 will be measured using the mean percentage change from baseline in LSS (Lesion Severity Score) at Weeks 4, 8, 12, and 16.	16 weeks
Mean Absolute Change in LSS	The LSS is used to score the severity of psoriasis plaques. The dimensions of scaling, erythema, and plaque elevation are each scored on a scale from 0 (clear) to 4 (very severe), and the total LSS is the numerical sum of the 3-dimensional scores.The efficacy of EDP1815 will be measured using the mean absolute change from baseline in LSS (Lesion Severity Score) at Weeks 4, 8, 12, and 16.	16 weeks
Mean Percentage Change in DLQI	The DLQI is a patient reported outcomes instrument for assessing the impact of dermatologic conditions on patients' quality of life. The higher the score the more the impact on quality of life. The efficacy of EDP1815 will be measured using mean percentage change from baseline in Dermatology Life Quality Index (DLQI) at Weeks 4, 8, 12, and 16.	16 weeks
Mean Absolute Change in DLQI	The DLQI is a patient reported outcomes instrument for assessing the impact of dermatologic conditions on patients' quality of life. There are 10 questions each scored 0-3, the higher the score the more the impact on quality of life (Total score range 0-30; 0 = no impact, 30 = greatest impact).The efficacy of EDP1815 will be measured using the mean absolute change from baseline in Dermatology Life Quality Index (DLQI) at Weeks 4, 8, 12, and 16	16 weeks
Mean Percentage Change in mNAPSI	The mNAPSI is a tool for physicians to evaluate the severity of nail bed psoriasis and nail matrix psoriasis by area of involvement in the nail unit. The higher the score the more severe the nail bed psoriasis. The efficacy of EDP1815 will be measured using the mean percentage change in mNAPSI total score (modified Nail Psoriasis Severity Index) from baseline at Weeks 4, 8, 12, and 16	16 weeks
Mean Absolute Change in mNAPSI	The mNAPSI is a tool for physicians to evaluate the severity of nail bed psoriasis and nail matrix psoriasis by area of involvement in the nail unit. Each fingernail is rated for the presence and severity of seven features to give a total fingernail score of 0-13 (0= no involvement, 13 = greatest involvement). The total mNAPSI score is the sum of the 10 fingernail scores (range 0-130; 0= no involvement, 130= greatest involvement).The higher the score the more severe the nail bed psoriasis. The efficacy of EDP1815 will be measured using the mean absolute change in mNAPSI total score (modified Nail Psoriasis Severity Index) from baseline at Weeks 4, 8, 12, and 16	16 weeks
Cumulative Incidence of Partial Relapse	The efficacy of EDP1815 will be measured by calculating the cumulative incidence of partial relapse at Weeks 20, 24, 28, and 40 for participants who were classified as responders at week 16. Partial relapse is defined as a loss of the PASI-50 response after week 16 and after cessation of study treatment, or commencing a new treatment for psoriasis.	40 weeks
Cumulative Incidence of Complete Relapse	The efficacy of EDP1815 will be measured by calculating the cumulative incidence of complete relapse at Weeks 20, 24, 28, and 40 in participants who were considered as responders at week 16. Relapse is defined as an increase in the severity of the psoriasis as measured by PASI to the baseline value or greater, or commencement of a new treatment for psoriasis.	40 weeks
Cumulative Incidence of Rebound	The efficacy of EDP1815 will be measured by calculating the cumulative incidence of rebound at Weeks 20, 24, 28, and 40 in participants with at least one PASI assessment after the end of treatment. Rebound is defined as an increase in the severity of the psoriasis as measured by PASI to 125% of baseline score or above, or onset of new pustular/erythrodermic psoriasis, within 3 months of cessation of study treatment.	40 weeks

Collaborators and Investigators

• Sponsor: Evelo Biosciences, Inc.
• Investigators: Principal Investigator: Benjamin Ehst, MD PhD, Oregon Medical Research Center; Study Director: Douglas Maslin, MPhil MBBS, Evelo Biosciences

Study record dates

Study Major Dates

• Study Start (Actual): September 21, 2020
• Primary Completion (Actual): July 2, 2021
• Study Completion (Actual): December 6, 2021

Study Registration Dates

• First Submitted: October 16, 2020
• First Submitted That Met QC Criteria: October 22, 2020
• First Posted (Actual): October 26, 2020

Study Record Updates

• Last Update Posted (Actual): December 19, 2022
• Last Update Submitted That Met QC Criteria: November 22, 2022
• Last Verified: September 1, 2022

More Information

Terms related to this study

• Keywords: psoriasis; plaque psoriasis; PSO; mild psoriasis; moderate psoriasis; EDP1815
• Additional Relevant MeSH Terms: Skin Diseases; Skin Diseases, Papulosquamous; Psoriasis
• Other Study ID Numbers: EDP1815-201

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No