First-in-Human Dose-escalation of GSK4425689A: Safety, Tolerability, and PK in Healthy Adults (NCT07646353) | Clinical Trial Compass
Not Yet RecruitingPhase 1
First-in-Human Dose-escalation of GSK4425689A: Safety, Tolerability, and PK in Healthy Adults
40 participantsStarted 2026-06-12
Plain-language summary
This study will assess the safety, tolerability, and pharmacokinetic properties of GSK4425689A monoclonal antibody (mAb) in healthy adults, when administered by either intravenous (IV) or subcutaneous (SC) routes.
Who can participate
Age range
18 Years – 65 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Participants must be 18 to 65 years of age inclusive, at the time of signing the informed consent.
. Participants must have a body weight between 50 and 100 kg, inclusive and body-mass index (BMI) within the range of 18.0 to 32.0 kg/m\^2.
. Participants must be healthy male or female participant of non-childbearing potential (PONCBP).
. Participants must be capable of giving signed informed consent prior to any study-specific procedures, which include compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.
. Participants must demonstrate the ability to understand and comply with the study requirements, including attendance for all scheduled visits and adherence to protocol-specified procedures and restrictions. Participants must be willing to remain in close contact with study personnel and reliably record data as instructed.
. Participants must be in good general health and have no significant ongoing medical conditions, as determined by comprehensive medical history, thorough physical examination, vital signs assessment, 12-lead ECG, and clinical laboratory evaluations (including hematology, biochemistry, and urinalysis).
Exclusion criteria
. Serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), and total bilirubin levels must be within the normal range at Screening.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Number of participants with adverse events (AEs) overall and by severity
Timeframe: From Day 1 up to Day 364
2
Number of participants with serious adverse events (SAEs) overall and by severity
Timeframe: From Day -28 [informed consent form (ICF) signing] up to Day 364
. Participants with a history of malaria infection or who have previously participated in malaria vaccine trials or studies involving experimental anti-malarial monoclonals, small molecule drugs, or experimental malaria challenge are excluded. Participants who have been vaccinated against malaria with an investigational or approved vaccine (e.g., RTS,S and R21/Matrix-M) are excluded.
. History of allergy to humanized monoclonal antibodies (mAbs) or constituents of the formulation.
. Any history of anaphylaxis or other severe allergic reactions, or food, or drug allergy that may impact participant safety in the opinion of the investigator.
. Recent history of, or presence of a current or suspected chronic disease that may impact participant safety, or impact interpretation of clinical study results. This includes illnesses such as (but not limited to) cardiac disease, autoimmune disease, diabetes, progressive neurological disease, severe malnutrition, hepatic or renal disease, epilepsy, chronic obstructive pulmonary disease or asthma (except resolved childhood asthma, which is acceptable). Conditions that in the opinion of the investigator constitute a risk to the individual when taking the study intervention or likely to interfere with the interpretation of data.
. Have a history of malignant neoplasm (other than localized basal or squamous cell carcinoma of the skin or in situ cervical cancer), treated or untreated, within 5 years of Screening, regardless of whether there is evidence of local recurrence or metastases.
. Current enrolment or participation in another clinical study.
. Participation in another clinical study involving any investigational product within the past 90 days or within a period equivalent to 5 half-lives of the investigational drug, whichever is longer, or receipt of experimental non-malaria vaccines or mAbs within the past 12 months prior to signing the informed consent.