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Completed

NCT Number: NCT06716879

A Study to Evaluate Safety, Tolerability, and Pharmacokinetics of a Single Dose of Donzakimig in Healthy Chinese and Japanese Participants

The purpose of the study is to investigate the safety, tolerability, and pharmacokinetic parameters of 2 dose strengths of donzakimig, each administered subcutaneously as a single dose, in healthy Chinese and Japanese study participants.

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Key information

Conditions

Healthy Participants

Age range

18 year–55 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1

Primary location

UP0142 1

Anaheim, California, 92801, United States

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Study participant must be 18 to 55 years of age inclusive at the time of signing the informed consent form (ICF)
  • Study participant who is overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, and cardiac assessment
  • Chinese study participant who is of Chinese descent as evidenced in appearance and verbal confirmation of familial heritage and is of Chinese descent with all 4 grandparents, OR Japanese study participant who is of Japanese descent as evidenced in appearance and verbal confirmation of familial heritage and is of Japanese descent with all 4 grandparents
  • Study participant has a body mass index within the range of 18 to 30kg/m2 (inclusive)
  • Study participant can be male or female

Exclusion criteria

  • Study participant has clinically significant multiple or severe drug allergies (including to humanized monoclonal antibodyies (mAbs), intolerance to topical corticosteroids, severe post-treatment hypersensitivity reactions (including, but not limited to, erythema multiforme major, linear immunoglobulin A dermatosis, toxic epidermal necrolysis, and exfoliative dermatitis), known relevant allergy (not including mild seasonal hay fever and/or conjunctivitis or low grade food intolerances), pre-existing history of a relevant allergic condition, or a predisposition for an allergic reaction, as judged by the Investigator
  • Study participant has a recent history (within 6 months prior to Screening) or currently active clinically-significant bacterial, fungal, endoparasite (including the presence of ova, cysts, or parasites detected in stool sample provided at Screening), or viral (including hospitalization for coronavirus disease 2019 [COVID-19]) infection, as judged by the Investigator
  • Study participant has a history of inflammatory bowel disease (eg, Crohn's disease or ulcerative colitis)
  • Study participant has a history of diabetes
  • Study participant has received any vaccination within 8 weeks for live vaccines (including attenuated) and 4 weeks for nonlive vaccines prior to the Baseline Visit or is anticipated to do so within 60 days after the dose of IMP
  • Study participant has received Bacillus Calmette-Guerin vaccinations within 1 year prior to the Baseline Visit or will receive them within 90 days after the dose of IMP
  • Study participant has participated in another study of an IMP or has received any biologic agent within the 30 days prior to Screening (or 5 half-lives, whichever is longer)
  • Study participant has had a positive human immunodeficiency virus (HIV) antibody test
  • Study participant has the presence of either hepatitis B core antibody or hepatitis B surface antigen at Screening or within 3 months prior to dosing
  • Study participant has a positive hepatitis C antibody test result at Screening or within 3 months prior to Screening.
  • Study participant has a positive hepatitis C ribonucleic acid (RNA) test result at Screening or within 3 months prior to Screening

Treatment and study plan

Donzakimig

Drug

Drug: Donzakimig Pharmaceutical form: Subcutaneous solution

Other names: UCB1381

Placebo

Drug

Drug: Placebo Pharmaceutical form: Subcutaneous solution

Primary outcomes

  1. Occurrence of treatment-emergent adverse events (TEAEs)

    Time frame: From Baseline to End of Study visit (up to Day 57)

    An Adverse Event (AE) is any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product, which does not necessarily have a causal relationship with this treatment. Treatment emergent adverse events (TEAEs) are adverse events not present prior to the pharmaceutical product administration or an already present event that worsens either in intensity or frequency

  2. Occurrence of serious treatment-emergent adverse events (serious TEAEs)

    Time frame: From Baseline to End of Study visit (up to Day 57)

    A serious treatment-emergent adverse event (serious TEAE) is defined as any untoward medical occurrence that, at any dose:

    Results in death Is life-threatening Requires inpatient hospitalization or prolongation of existing hospitalization Results in persistent disability/incapacity Is a congenital anomaly/birth defect Important medical events

  3. Maximum plasma concentration (Cmax) of donzakimig

    Time frame: Sampling timepoints will be on Day 1 (D1): at predose and 6 hours (h), 24h (D2), 72h (D4), 120h (D6), D8, D15, D22, D36, and D57 after investigational medicinal product (IMP) administration.

    Cmax: Maximum plasma concentration of donzakimig

  4. Area under the plasma concentration-time curve from time 0 to t of donzakimig

    Time frame: Sampling timepoints will be on Day 1 (D1): at predose and 6 hours (h), 24h (D2), 72h (D4), 120h (D6), D8, D15, D22, D36, and D57 after investigational medicinal product (IMP) administration.

    AUC0-t: Area under the plasma concentration-time curve from from 0 to the time (t) of the last quantifiable concentration.

  5. Area under the plasma concentration-time curve from zero to infinity of donzakimig

    Time frame: Sampling timepoints will be on Day 1 (D1): at predose and 6 hours (h), 24h (D2), 72h (D4), 120h (D6), D8, D15, D22, D36, and D57 after investigational medicinal product (IMP) administration.

    AUC: Area under the plasma concentration-time curve from zero to infinity of donzakimig

Sponsors and collaborators

Lead sponsor

UCB Biopharma SRL

Industry

Registry information

Official study title

A Single-Center, Randomized, Investigator- and Participant-Blind, Placebo-Controlled, Phase 1 Study to Evaluate Safety, Tolerability, and Pharmacokinetics After a Single Dose of Donzakimig in Healthy Chinese and Japanese Participants

Important dates

Study start
2024
Primary completion
2025
Study completion
2025
First posted
Dec 4, 2024
Registry last updated
Feb 18, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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