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Completed

NCT Number: NCT05682352

Investigating the Safety of LEO 158968 in Healthy Volunteers

The purpose of this study is to investigate what side effects the new compound LEO 158968 might cause and how well it is tolerated when it is used by healthy participants. It will also investigate how quickly and to what extent LEO 158968 is distributed and eliminated from the body and if LEO 158968 causes the body to make antibodies.

In the single ascending dose (SAD) cohorts, participants will receive escalating doses of LEO 158968 if the safety and tolerability results of the initial participants up to 48 hours (or 4 days for SC dosing) following dosing are acceptable to the Investigator.

In the multiple ascending dose (MAD) cohorts, the dose of LEO 158968 will be determined based on results derived from the earlier SAD cohorts and additional preclinical data from a 5-week good laboratory practice (GLP) cynomolgus monkey toxicology study.

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Key information

Conditions

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1

Primary location

LEO Pharma Investigational Site

Groningen, 9728, Netherlands

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Age: 18 to 60 years, inclusive, at screening
  • Sex: Male or female
  • Body mass index: 18.0 kg/m^2 to 32.0 kg/m^2, inclusive, at screening
  • Health status: In good health as judged by the Investigator based on medical history, physical examination, electrocardiogram (ECG), hematology, biochemistry, and urinalysis.

Exclusion criteria

A participant who meets any of the following exclusion criteria will not be eligible for inclusion in the study:

  • Male participants sexually active with a woman of childbearing potential who are not willing to use a barrier method of contraception (eg, condom) from the time of first dose of investigational medicinal product (IMP) until 16 weeks after the last dose, in conjunction with this female partner using a highly effective form of contraception.
  • Female participants who are pregnant, lactating, or planning to become pregnant during the time of the trial.
  • Participants with any surgical or medical condition which might significantly alter the distribution, metabolism, or excretion of any drug.
  • Positive polymerase chain reaction (PCR) test for coronavirus disease-19 (COVID-19) on Day -1, or contact with COVID-19 positive (or suspected) persons within 14 days prior to first dose.
  • ECG with QT-interval corrected for heart rate (QTc) using Fridericia's formula (QTcF) >450 msec for men, >460 msec for women, confirmed by repeat measurement at screening.
  • Treatment with any prescribed or nonprescribed systemic or topical medication within 7 days prior to the first dose of IMP (excluding paracetamol; including herbal remedies), unless, in the opinion of the Investigator and the Sponsor, the medication will not interfere with the trial procedures or compromise safety.

Treatment and study plan

LEO 158968

Drug

IV infusion or SC injection

Placebo

Drug

IV infusion or SC injection

Primary outcomes

  1. Number of Treatment-emergent Adverse Events (TEAEs) Reported for Each Participant

    Time frame: Day 1 to Day 113

    Any clinically significant changes from baseline in clinical laboratory parameters, vital signs including systolic and diastolic blood pressure, and abnormal clinically significant findings from physical examinations following first dose will be recorded as TEAEs.

Secondary outcomes

  1. Area Under the Serum Concentration-time Curve from Time 0 to Infinity (AUC0-∞) of LEO 158968

    Time frame: Day 1 to Day 85

  2. Area Under the Serum Concentration-time Curve from 0 Hours to 168 Hours (AUC0-168h) of LEO 158968

    Time frame: Day 1 to Day 85

  3. Area Under the Serum Concentration-time Curve from t=0 to t (AUC0-t) of LEO 158968

    Time frame: Day 1 to Day 85

    Where t corresponds to the last observed quantifiable concentration calculated by the linear up - logarithmic down trapezoidal rule.

  4. Serum Concentration Observed at 168 Hours Post-dose (C168h) of LEO 158968

    Time frame: Day 1 to Day 85

  5. Maximum Observed Serum Concentration (Cmax) of LEO 158968

    Time frame: Day 1 to Day 85

  6. Apparent Terminal Half-life (t1/2) of LEO 158968

    Time frame: Day 1 to Day 85

  7. Time of Last Quantifiable Concentration (tlast) of LEO 158968

    Time frame: Day 1 to Day 85

  8. Time of Cmax (tmax) of LEO 158968

    Time frame: Day 1 to Day 85

  9. Area Under the Serum Concentration-time Curve Over the Dosing Interval τ (ie, 168 hours) (AUCτ) of LEO 158968

    Time frame: Day 1 to Day 113

  10. AUC0-t of LEO 158968

    Time frame: Day 1 to Day 113

  11. Trough Serum Concentration Observed at the End of a Dosing Interval (168 hours post-dose) (Cτ) of LEO 158968

    Time frame: Day 1 to Day 113

  12. Cmax of LEO 158968

    Time frame: Day 1 to Day 113

  13. t1/2 of LEO 158968

    Time frame: Day 1 to Day 113

  14. tlast of LEO 158968

    Time frame: Day 1 to Day 113

  15. tmax of LEO 158968

    Time frame: Day 1 to Day 113

  16. Number of Participants with Antidrug Antibodies (ADA)

    Time frame: Day 1 to Day 113

Sponsors and collaborators

Lead sponsor

LEO Pharma

Industry

Registry information

Official study title

A Randomized, Double-Blind, Placebo-Controlled, Single- And Multiple Ascending Dose Trial To Evaluate The Safety, Tolerability, And Pharmacokinetics Of Leo 158968 In Healthy Subjects

Important dates

Study start
2023
Primary completion
2024
Study completion
2024
First posted
Jan 12, 2023
Registry last updated
Apr 28, 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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