Safety, Tolerability and Pharmacokinetics (PK) Investigation of GSK3494245 in Healthy Participants

Study at a glance

From the registry record, last updated by the sponsor on 1 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.

Official title

A Randomized, Double-blind, Placebo-controlled, First Time in Human Study to Evaluate the Safety, Tolerability and Pharmacokinetics of Single (in Both Fed and Fasted States) Doses of GSK3494245 in Healthy Participants

ClinicalTrials.gov ID

NCT04504435

Acronym / sponsor ID

208441

Conditions

Leishmaniasis

Keywords

GSK3494245, Leishmaniasis, Single Ascending Dose, First Time in Human, Pharmacokinetics

Phase

Phase 1

Study type

Interventional

Recruitment status

TerminatedReason stopped: Further development of GSK3494245 has been halted based on assessment of clinical data indicating that predicted efficacious doses cannot be achieved in line with dosing requirements outlined in the target product profile for the proposed indication.

Enrolment

59 participants (actual)

Lead sponsor

GlaxoSmithKlineIndustry (pharma, biotech, devices)

Study start

29 Sep 2020 (actual)

Primary completion

14 Jan 2024 (actual)

Study completion

14 Jan 2024 (actual)

First posted

7 Aug 2020 (actual)

Results

Posted 1 May 2026

Clinical summary

The research question as the sponsor registered it. This describes what the study plans to test, not what it found.

Study design

Primary purpose

Treatment

Allocation

Randomised

Intervention model

Sequential

Masking

Double blind (participant, investigator)

Number of arms

20

Model description

The study consists of sequential and cross-over (SAD part, within cohort) groups.

Who may qualify

Ages

18 to 55 years

Sex

Male only

Healthy volunteers

Accepted

Age groups

Adult

Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.

Interventions

Primary outcome

1. Number of Participants With Adverse Events (AEs)

   Time frame: From Day 1 (first dose) up to 14 days post last dose in each treatment period

   An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention.

2. Number of Participants With Serious Adverse Events (SAEs)

   Time frame: From the signing of the informed consent form (a period starting up to 28 days before the first dose on Day 1) to up to 14 days after the last dose of each treatment period

   A SAE is defined as any untoward medical occurrence that, at any dose: resulted in death, was life threatening, required hospitalization or prolongation of existing hospitalization, resulted in disability/incapacity, congenital anomaly/birth defect or any other situation according to medical or scientific judgment.

3. Number of Participants With Treatment Emergent AEs (TEAEs) and Treatment Emergent SAEs

   Time frame: From Day 1 (first dose) up to 2 days post last dose in each treatment period

   A TEAE and treatment emergent SAE is considered any untoward medical occurrence in a clinical study participant, considered by the investigator to have a causal relationship with study treatment. A SAE is defined as any untoward medical occurrence that, at any dose: resulted in death, was life threatening, required hospitalization or prolongation of existing hospitalization, resulted in disability/incapacity, congenital anomaly/birth defect or any other situation according to medical or scientific judgment.

4. Summary of Change From Baseline in Hematology Parameters: Basophils, Neutrophils, Eosinophils, Lymphocytes, Monocytes and Platelets

   Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

   Blood samples were collected for the assessment of the hematology parameters: basophils, neutrophils, eosinophils, lymphocytes, monocytes and platelets. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. Standard deviation (SD)=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

5. Summary of Change From Baseline in Hematology Parameters: Mean Corpuscular Volume

   Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

   Blood samples were collected for the assessment of the hematology parameters: mean corpuscular volume. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

6. Summary of Change From Baseline in Hematology Parameters: Mean Corpuscular Hemoglobin

   Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

   Blood samples were collected for the assessment of the hematology parameters: mean corpuscular hemoglobin. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

7. Summary of Change From Baseline in Hematology Parameters: Erythrocytes and Reticulocytes

   Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

   Blood samples were collected for the assessment of the hematology parameters: erythrocytes and reticulocytes. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value.

8. Summary of Change From Baseline in Hematology Parameters: Hemoglobin

   Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

   Blood samples were collected for the assessment of the hematology parameters: hemoglobin. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value.

9. Summary of Change From Baseline in Hematology Parameters: Hematocrit and Reticulocytes

   Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

   Blood samples were collected for the assessment of the hematology parameters: hematocrit and reticulocytes. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value.

10. Summary of Change From Baseline in Clinical Chemistry Parameters: Alanine Aminotransferase (ALT), Alkaline Phosphate (ALP), Aspartate Aminotransferase (AST), Creatine Phosphokinase (CPK), and Gamma Glutamyl Transferase (GGT)

    Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

    Blood samples were collected for the assessment of the clinical chemistry parameters: ALT, ALP, AST, CPK, and GGT. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value.

11. Summary of Change From Baseline in Clinical Chemistry Parameters: Albumin, Protein

    Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

    Blood samples were collected for the assessment of the clinical chemistry parameters: albumin and protein. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value.

12. Summary of Change From Baseline in Clinical Chemistry Parameters: Bicarbonate, Calcium Corrected for Albumin, Glucose, Lactic Acid, Magnesium, Phosphate, Potassium, Sodium, Triglycerides, and Urea

    Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

    Blood samples were collected for clinical chemistry parameters: bicarbonate, calcium corrected for albumin, glucose, lactic acid, magnesium, phosphate, potassium, sodium, triglycerides, urea. Baseline was defined as the last non-missing pre-dose assessment for each cohort. Generally, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments on Day 1 lacked timing, the first recorded was used. If one Day 1 assessment lacked timing, the last available from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, Baseline was set to missing. Change from baseline is defined as post-dose value minus baseline value. SD=0.0000 indicates SD below the detectable assay limit, approximated to 0.0000.

13. Summary of Change From Baseline in Clinical Chemistry Parameters: Bilirubin, Creatinine, Direct Bilirubin

    Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

    Blood samples were collected for the assessment of the clinical chemistry parameters: bilirubin, creatinine, direct bilirubin. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

14. Summary of Change From Baseline in Clinical Chemistry Parameters: C-reactive Protein (CRP)

    Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

    Blood samples were collected for the assessment of the clinical chemistry parameters: CRP. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

15. Summary of Change From Baseline in Clinical Chemistry Parameters: pH

    Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

    Blood samples were collected for the assessment of the clinical chemistry parameters: pH. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value.

16. Number of Participants With Worst-case Urinalysis Results

    Time frame: From Day 1 up to 14 Days post last dose

    Urine samples were collected for the assessment of urinalysis parameters, which include pH, glucose, protein, blood, ketones, bilirubin, urobilinogen, nitrite, leukocyte esterase by dipstick.

17. Summary of Change From Baseline in Physical Examinations: Body Mass Index (BMI)

    Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

    Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

18. Summary of Change From Baseline in Vital Signs: Respiratory Rate

    Time frame: At Day 1 (30 minutes, 1 hour [h], 1.5h, 2h, 2.5h, 4h, 8h, 12h), Day 2 (24h), Day 3 (48h), and Day 4 in each treatment period compared to Baseline (pre-dose)

    Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

19. Summary of Change From Baseline in Vital Signs: Supine Diastolic Blood Pressure, Supine Systolic Blood Pressure

    Time frame: At Day 1 (30 minutes, 1 hour [h], 1.5h, 2h, 2.5h, 4h, 8h, 12h), Day 2 (24h), Day 3 (48h), and Day 4 in each treatment period compared to Baseline (pre-dose)

    Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

20. Summary of Change From Baseline in Vital Signs: Supine Pulse Rate

    Time frame: At Day 1 (30 minutes, 1 hour [h], 1.5h, 2h, 2.5h, 4h, 8h, 12h), Day 2 (24h), Day 3 (48h), and Day 4 in each treatment period compared to Baseline (pre-dose)

    Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

21. Summary of Change From Baseline in Vital Signs: Tympanic Membrane Temperature

    Time frame: At Day 1 (30 minutes, 1 hour [h], 1.5h, 2h, 2.5h, 4h, 8h, 12h), Day 2 (24h), Day 3 (48h), and Day 4 in each treatment period compared to Baseline (pre-dose)

    Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

22. Summary of Change From Baseline in Physical Examinations: Weight

    Time frame: At Day 2 and Day 4 in each treatment period compared to Baseline

    Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value. SD=0.0000 is defined as SD resulted below the detectable limit of the assay and approximate to 0.0000.

23. Summary of Change From Baseline in Electrocardiogram (ECG) Parameters: Heart Rate

    Time frame: At Day 1 (30 minutes, 1 hour [h], 1.5h, 2h, 2.5h, 4h, 8h, 12h), Day 2 (24h), Day (48h), and Day 4 in each treatment period compared to Baseline (pre-dose)

    Triplicate 12-lead ECGs were obtained using an ECG machine that automatically calculated the heart rate. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value.

24. Summary of Change From Baseline in ECG Parameters: PR Interval, QRS Interval, QT Interval, Corrected QT (QTc) Interval, QT Interval Corrected Using Bazett's Formula, QT Interval Corrected, Using Fridericia's Formula

    Time frame: At Day 1 (30 minutes, 1 hour [h], 1.5h, 2h, 2.5h, 4h, 8h, 12h), Day 2 (24h), Day (48h), and Day 4 in each treatment period compared to Baseline (pre-dose)

    Triplicate 12-lead ECGs were obtained using an ECG machine that automatically measured the PR interval, QRS interval, QT interval, and QTc interval. Baseline was defined as the last non-missing pre-dose assessment for each cohort. In general, assessments on Study Day 1 taken before the first dose were used as Baseline. If multiple assessments were captured on Day 1 but the time of the first assessment was missing, the first recorded assessment was used. If only one Day 1 assessment lacked timing, the last available assessment from Day -1 or earlier was used. If no Day 1 assessments were available, the most recent data from Day -1 or screening was used. If all pre-dose data were missing, no derivation was performed, and Baseline was set to missing. Change from baseline value is defined as post-dose value minus baseline value.

25. Number of Participants With Abnormal Cardiac Telemetry Findings

    Time frame: Up to 24 hours post first dose on Day 1

    Telemetry is defined as the continuous monitoring of a participant's heart rate and rhythm from a remote location.

Results and safety

Loading the posted results from ClinicalTrials.gov…

Research links

• Official record on ClinicalTrials.govLast updated by the sponsor 1 May 2026.
• Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
• Derived from this study: PubMed 42127151Moodley M, Kostapanos M, Iavarone L, Bracher M, Lavezzi SM, Davy M, Singh P, Bhat R, Wong D, Sharma H, Tan LK, Miles TJ. Safety and pharmacokinetics of GSK3494245, a highly selective Leishmaniasis kinetoplastid proteasome inhibitor for the treatment of visceral leishmaniasis: A Phase 1, randomized, single ascending dose escalation study in healthy participants. PLoS Negl Trop Dis. 2026 May 13;20(5):e0014181. doi: 10.1371/journal.pntd.0014181. eCollection 2026 May.
• Individual participant dataSharing planned: Yes. IPD for this study will be made available via the Clinical Study Data Request site.

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Referral and contact

AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.

1 site in 1 country: see every site and its status.