A Double-blind Placebo-controlled Randomized Trial Evaluating the Efficacy and Safety of a Novel HSP90 Inhibitor (RGRN-305) in the Treatment of Moderate to Severe Hidradenitis Supppurativa.

An Investigator Initiated, Phase 1b, Randomized, Double-Blind, Placebo-Controlled, Proof-Of-Concept Study to Assess the Safety and Efficacy of a Novel HSP90 Inhibitor (RGRN-305) in the Treatment of Moderate to Severe Hidradenitis Suppurativa

This is a 16-week treatment, randomized, double-blind, proof-of-concept study designed to assess the safety and efficacy of RGRN-305 compared to placebo for use in future efficacy Phase 2 trials.

Male or female subjects aged 18 years or older with moderate to severe hidradenitis suppurativa will be included in this study.

Objectives are to determine the efficacy and safety of RGRN-305 in patients with moderate to severe hidradenitis supppurativa.

Study Overview

• Status: Completed
• Conditions: Hidradenitis Suppurativa
• Intervention / Treatment: Drug: RGRN-305; Drug: Placebo

• Study Type: Interventional
• Enrollment (Actual): 15
• Phase: Phase 1

Contacts and Locations

Study Locations

• Denmark
  • Aarhus, Denmark, 8200
    • Aarhus University Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 99 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

Subjects will be eligible to be enrolled in the study if they meet all of the following criteria at the Screening and Baseline (Day 0) Visits, unless specified otherwise:

1. Men or women aged 18 years or older at the time of consent.
2. Subject has a history of onset of hidradenitis suppurativa for at least 6 months prior to Baseline (Day 0) Visit.
3. Subject has hidradenitis suppurativa with at least 5 inflammatory nodules or abscesses (total AN count) in at least 2 distinct anatomic areas, both at Screening and Baseline (Day 0) Visits. Furthermore, one additional inflammatory nodule must be present for collection of skin biopsies.

4. Subjects (women and men) involved in any sexual intercourse that could lead to pregnancy must agree to use an effective contraceptive method from at least 4 weeks before Baseline (Day 0) until at least 4 weeks after the last study product administration for the duration of the study. Effective contraceptive methods are: systemic hormonal contraceptives (oral contraceptive, patch, vaginal ring, injectables, or implants), intrauterine devices, vasectomy, or barrier methods of contraception in conjunction with spermicide. Hormonal contraceptives must be on a stable dose for at least 4 weeks before Baseline (Day 0).

   Note: Woman of non-childbearing potential are as follows:

   • Women who have had surgical sterilization (hysterectomy, bilateral oophorectomy, bilateral salpingectomy, or bilateral tubal ligation).
   • Women ≥ 60 years of age.
   • Women > 40 and < 60 years of age who have had a cessation of menses for at least 12 months and a follicle-stimulating hormone (FSH) test confirming non-childbearing potential (FSH ≥ 40 mIU/mL) or cessation of menses for at least 24 months without FSH levels confirmed.

   Protocol RGRN-305 - Safety and Efficacy of RGRN-305 in HS Page 13 of 61 Protocol version 3.2: 13 September 2021

5. Women of childbearing potential must have a negative serum pregnancy test at screening and negative urine pregnancy test at Baseline (Day 0).
6. Subject must have negative tuberculosis (TB) infection tests. Subjects will be evaluated for latent TB infection with a purified protein derivative (PPD) test, T-spot test or a Quantiferon Gold test, and with a chest x-ray, if one has not been performed in the last 6 months. Subject who demonstrates evidence of latent TB infection (either PPD ≥ 5 mm of induration or positive Quantiferon Gold or T-spot test, irrespective of Bacillus Calmette-Guérin (BCG) vaccination status and negative chest x-rays findings for active TB, or suspicious chest x-ray findings) will not be allowed to participate in the study.
7. Subject must be willing to participate and must be capable of giving informed consent, and the consent must be obtained prior to any study-related procedures.

Exclusion Criteria:

1. Female subject who is breastfeeding, pregnant, or who is planning a pregnancy during the study.
2. Subject has a history of skin disease or presence of a skin condition that, in the opinion of the investigator, would interfere with the study assessments.
3. Subject is known to have immune deficiency or is immunocompromised.
4. Subject has a history of cancer or lymphoproliferative disease within 5 years prior to Baseline (Day 0). Subjects with successfully treated non-metastatic cutaneous squamous cell or basal cell carcinoma and/or localized carcinoma in situ of the cervix are not to be excluded.
5. Subject has had a major surgery within 8 weeks prior to Baseline (Day 0) or has a major surgery planned during the study.
6. Subject has any clinically significant medical condition including ongoing infections, or physical/laboratory/ECG/vital signs abnormality that would, in the opinion of the investigator, put the subject at undue risk or interfere with interpretation of study results.
7. Subject has alanine aminotransferase (ALT) or aspartate aminotransferase (AST) values ≥ 2 times the upper limit of normal (ULN) at Screening.
8. Subject has absolute neutrophil count ≤ 1.5 X 109/L or platelet count ≤ 100 X 109/L at Screening.
9. Subject has a history of clinically significant anemia or hemoglobin (Hgb) value ≤ 10 g/dL (6.21 mmol/dL) at Screening.
10. Subject has a creatine clearance ≤ 60 mL/min at Screening (calculated with Cockcroft-Gault formula).
11. Subject with positive results for hepatitis B surface antigens (HBsAg), anti-hepatitis B core antibodies (anti-HBc), hepatitis C virus (HCV), or human immunodeficiency virus (HIV).
12. Subject has a known or suspected allergy to RGRN-305 or any component of the investigational product.
13. Subject has a history of clinically significant drug or alcohol abuse in the last year prior to Baseline (Day 0) Visit.
14. Subject is currently receiving an investigational product or device or has received one within 4 weeks prior to Baseline (Day 0) Visit.
15. Subject has received a live attenuated vaccine within 4 weeks prior to Baseline (Day 0) Visit or plan to receive a live attenuated vaccine during the study and up to 1 month after the last study drug administration.
16. Subject has a history of an allergic reaction or significant sensitivity to lidocaine or other local anesthetics.
17. Subject has a history of hypertrophic scarring or keloid formation in scars or suture sites.
18. Known inability or unavailability of a subject to complete required study visits during study participation.
19. A psychiatric condition (e.g., suicidal ideation), chronic alcohol, or drug abuse problem, determined from the subject's medical history, which, in the opinion of the investigator, may pose a threat to subject compliance.

Study Plan

How is the study designed?

Design Details

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

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: RGRN-305; 1 tablet of 250mg RGRN-305 once daily for 16 weeks	Drug: RGRN-305; Heat shock protein 90 inhibitor
Placebo Comparator: Placebo; 1 tablet of placebo once daily for 16 weeks	Drug: Placebo; Placebo (blinded)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Percentage of subjects achieving Hidradenitis Suppurativa Clinical Response 50 (HiSCR-50) score	Week 16

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percentage of subjects with Hidradenitis Suppurativa Physician's Global Assessment (HS-PGA) scores of clear or minimal		Week 2, 4, 8, 12, 14, 16, and 20.
Percentage of subjects achieving HiSCR-50, HiSCR-75, and HiSCR-90		Week 2, 4, 8, 12, 14, 16, and 20.
Changes from Baseline in the Dermatology Life Quality Index (DLQI) total score	Minimum score: 0 (no effect at all on patient's life) Maximum score: 30 (extremely large effect on patient's life)	Week 4, 8, 12, 16, and 20.
Changes from Baseline in the Pain Numerical Ranging score	Minimum score: 0 (No pain) Maximum score: 10 (worst pain)	Weeks 4, 8, 12, 16, and 20
Change and percent change from Baseline in lesion counts (abscess count, inflammatory nodule count, AN count, and draining tunnel count).		Week 2, 4, 8, 12, 14, 16, and 20.
Change from Baseline in skin biomarkers		Week 16.
Change from Baseline in blood biomarkers		Week 4, 8, 12, and 16.
Incidence of treatment-emergent adverse events (TEAEs).		Week 20
Incidence of related TEAEs.		Week 20

Collaborators and Investigators

• Sponsor: Aarhus University Hospital

Study record dates

Study Major Dates

• Study Start (Actual): September 1, 2021
• Primary Completion (Actual): August 29, 2022
• Study Completion (Actual): August 29, 2022

Study Registration Dates

• First Submitted: March 10, 2022
• First Submitted That Met QC Criteria: March 10, 2022
• First Posted (Actual): March 18, 2022

Study Record Updates

• Last Update Posted (Actual): January 31, 2023
• Last Update Submitted That Met QC Criteria: January 30, 2023
• Last Verified: January 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Sweat Gland Diseases; Skin Diseases; Infections; Bacterial Infections; Bacterial Infections and Mycoses; Skin Diseases, Infectious; Suppuration; Skin Diseases, Bacterial; Hidradenitis Suppurativa; Hidradenitis
• Other Study ID Numbers: RGRN-305-002; 2021-000881-13 (EudraCT Number)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

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