Dose Escalation Trial of Safety, Pharmacokinetic/Pharmacodynamic and Preliminary Clinical Activity of Briquilimab in Adult Patients with Chronic Spontaneous Urticaria (CSU)

Launched by JASPER THERAPEUTICS, INC. · Dec 7, 2023

Keywords

ClinConnect Summary

This clinical trial is studying a new medication called briquilimab for adults with chronic spontaneous urticaria (CSU), a condition that causes persistent itching and hives. The trial aims to find out if briquilimab is safe and effective for people who still experience symptoms despite taking other treatments, like antihistamines or omalizumab. The study is divided into three parts, with the first part open to all participants and the second and third parts being randomized, meaning some participants will receive the medication while others will receive a placebo (a treatment that looks the same but has no active ingredients).

To be eligible for the trial, participants need to be at least 18 years old, have been diagnosed with CSU for at least six months, and have experienced itching and hives for at least eight weeks while on current medications. Participants will need to keep a daily diary to track their symptoms and attend regular visits for testing. It's important to note that certain people, such as those who are pregnant or have other specific medical conditions, may not be able to participate. Overall, this trial offers a potential new treatment option for those struggling with CSU.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • 1. Written informed consent after the nature of the trial has been fully explained and before performing any trial related assessments
• • 2. Males and females, ≥18 years old
• 3. i. For Cohorts 1, 2, 3, 4a, 4b, 5, 5b, 6 and 7: Diagnosis of symptomatic CSU despite treatment as defined by:
• • 1. Diagnosis of CSU for ≥ 6 months
• • 2. The presence of itch and hives for ≥ 8 consecutive weeks at any time prior to Screening despite current use of H1-antihistamines (as reported by the participant)
• • 3. The presence of itch and hives for ≥ 8 consecutive weeks at any time prior to Screening despite treatment with omalizumab or intolerance to omalizumab (as reported by the participant)
• • 4. UAS7 of ≥ 16 and ISS7 of ≥ 8 on 7 consecutive days between Day -10 through Day-1 of Screening
• ii. For Cohorts 8 and 9: Diagnosis of symptomatic CSU despite treatment as defined by:
• • 1. Diagnosis of CSU for ≥ 6 months (as per local and international guidance)
• • 2. The presence of itch and hives for ≥ 8 consecutive weeks at any time prior to Screening despite current use of H1-antihistamines (as reported by the participant)
• • 3. Participants may be omalizumab naïve or have been previously exposed to omalizumab independent of treatment duration or response
• • 4. UAS7 of ≥ 16 and ISS7 of ≥ 8 on 7 consecutive days between Day -10 through Day -1 of Screening
• • 4. Use of H1-antihistamines on stable dose up to four-fold of the approved dose since Screening and not expected to change during first 12 weeks of the trial
• 5. Blood counts at Screening with:
• • 1. Hemoglobin: ≥ 11 g/dl
• • 2. Platelets: ≥ 100,000/mm3
• • 3. Leucocytes: ≥ 3,000/mm3
• • 4. Neutrophils: ≥ 2,000/mm3
• • 6. Willing and able to complete a daily diary for the duration of the trial and adhere to the trial visit schedule
• Exclusion Criteria:
• • 1. Women who are pregnant or nursing or intend to become pregnant during the course of the trial
• • 2. Dominant comorbid chronic urticaria with a clearly defined predominant or sole trigger (chronic inducible urticaria) including urticaria factitia (symptomatic dermographism), cold-, heat-, solar-, pressure-, delayed pressure-, aquagenic-, cholinergic-, or contact urticaria
• • 3. Other active diseases with possible symptoms of urticaria, wheals or angioedema, including urticarial vasculitis, erythema multiforme, cutaneous mastocytosis (urticaria pigmentosa), and hereditary or acquired angioedema (e.g., due to C1 inhibitor deficiency)
• • 4. Any other active skin disease associated with chronic itching that might confound the trial evaluations and results, in the opinion of the Investigator (e.g., atopic dermatitis, bullous pemphigoid, dermatitis herpetiformis, senile pruritus, etc.)
• • 5. History of anaphylaxis
• • 6. Any H2 antihistamine, leukotriene receptor antagonist or tricyclic antidepressant use within 3 days prior to Screening
• • 7. Experimental monoclonal antibody therapy (e.g., dupilumab, ligelizumab, etc.) within 6 months or Janus kinase (JAK) inhibitors within 5 half-lives prior to first IP dosing
• • 8. Immunosuppressive therapy (e.g., systemic corticosteroids, cyclosporine, methotrexate, dapsone, cyclophosphamide, tacrolimus and mycophenolate mofetil, hydroxychloroquine, etc.) within 4 weeks (or 5 half-lives, whichever is longer) prior to first IP dosing
• • 9. Electrocardiogram (ECG) findings at Screening that are considered clinically significant
• • 10. Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \> 1.5 x Upper limit of normal (ULN) at Screening
• • 11. Serum total bilirubin \>1.5 x ULN, unless attributable to Gilbert's syndrome
• • 12. Estimated creatinine clearance (eCrCl) by Cockcroft-Gault equation using total body weight \< 60 mL/min
• • 13. Known HIV+, active hepatitis B or hepatitis C infection, or acute/long-COVID
• • 14. Major abdominal or thoracic surgery within 8 weeks prior to Screening or planned surgery during trial participation
• • 15. Male participants (who are not vasectomized) who are not willing to use highly effective contraceptive methods (when having sexual intercourse with a female partner of childbearing potential, Section 8.2) and who are not willing to abstain from sperm donation during the trial and for at least 150 days after last IP dosing. A male participant is considered vasectomized if he had a vasectomy at least 4 months prior to Screening and if he has received post-surgical medical assessment of the surgical success of the vasectomy.
• • 16. Female participants of childbearing potential not willing to use highly effective contraceptive methods (Section 8.2) during the trial and for at least 150 days after last IP dosing. Women of nonchildbearing potential, must be surgically sterile (i.e., had undergone complete hysterectomy, bilateral oophorectomy, or tubal ligation) or be in menopausal state (at least 1 year without menses).
• • 17. Participation in another research trial involving the use of an IP within the last 30 days (or 5 halflives of IP, whichever is longer) prior to Screening
• • 18. Any known contraindications or hypersensitivity to any component of the IP, drugs of similar chemical classes (i.e., to murine, chimeric or human antibodies) or antihistamines or leukotrienes
• • 19. Any other acute or chronic medical or psychiatric condition or laboratory abnormality that could increase the risk associated with trial participation or IP administration or could interfere with the interpretation of trial results and, in the judgment of the Investigator, would make the participant inappropriate for entry into the trial
• • 20. Participants not willing to abstain from blood donations while being on the trial (until EOT Visit)
• • 21. Close affiliation with the Investigator (e.g., a close relative, financially dependent on the trial site) or participant who is an employee of the Sponsor's company