Phase 1 Study on the Safety, Tolerability, and Pharmacokinetics of JST-018 in Healthy Adults (NCT07595458) | Clinical Trial Compass
RecruitingPhase 1
Phase 1 Study on the Safety, Tolerability, and Pharmacokinetics of JST-018 in Healthy Adults
United States48 participantsStarted 2026-06-11
Plain-language summary
The goal of this clinical trial is to learn if a single dose of the study drug, JST-018, is safe and tolerable when administered by injection into the arm or thigh muscle of healthy men and women aged 18 to 55. The main questions it aims to answer are:
* Is a single administration of JST-018 safe?
* What is the concentration of the JST-018 in the blood over time?
* Do antibodies to JST-018 develop following a dose of JST-018? Researchers will compare JST-018 to Placebo to see if there are any differences in the safety and tolerability of a single dose at different dose levels.
Participants will be confined to the clinic for the first 3 days. They will receive an injection on the second day, and then return for 9 more visits over the period of 1 year for:
* Physical exam with vital signs
* Electro-cardiogram (ECG)
* Bood collection for clinical labs and research samples
* Urine sample
* Assessment of potential adverse effects and medications taken
Who can participate
Age range
18 Years – 55 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
. Healthy men or women 18 to 55 years of age
. BMI between 18 and 32 kg/m2
. Negative serum pregnancy test
. Use of highly effective birth control method(s) for a minimum of 60 days prior to consent and is willing to continue use for at least 12 months, or abstinence
. In good general health as determined by medical history, exams and tests
Exclusion criteria
. Acute illness or fever (≥100.4°F) within 7 days prior to dosing
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
Safety and tolerability of of JST-018 administered intramuscularly (IM)
Timeframe: From injection to Day 7
2
Safety and tolerability of of JST-018 administered IM
Timeframe: From injection to final visit at Week 48
3
Safety and tolerability of of JST-018 administered IM
Timeframe: From injection to final visit at Week 48
4
Safety and tolerability of of JST-018 administered IM
Timeframe: From injection to final visit at Week 48
5
Safety and tolerability of JST-018 administered as IM
Timeframe: From injection to final visit at Week 48
6
Safety and tolerability of JST-018 administered as IM
Timeframe: From injection to final visit at Week 48
. Any history of receiving treatment, vaccine, or monoclonal antibodies (mAbs) against smallpox, monkeypox, or other orthopox viruses.
. Receipt of any vaccine within 30 days prior to Screening, planned receipt of any vaccine prior to Day 1, or planned receipt of any vaccines before 45 days post-injection.
. Any medical condition for which IM injections would be contraindicated in the opinion of the investigator (eg, bleeding disorders, anticoagulant therapy, and severe thrombocytopenia)
. History of congenital or acquired immunodeficiency syndrome, , including positive human immunodeficiency virus (HIV-1/-2) antibody result
. Prior solid organ or bone marrow transplant
. Clinically significant corneal or lens abnormality as determined by history, clinical examination, or diagnostic imaging. Including, but not limited to:
. Use of immunosuppressive agents, anticoagulants, or antiarrhythmics within 1 year prior to Screening. Nasal steroid use is permissible.