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JST-018

Phase 1

Antiviral Drug | Monoclonal antibody | Infectious Disease |Evotec SE|Trials Updated: Aug 5, 2026

JST-018 target and mechanism

Molecular targetorthopoxviruses
Target classVirus
ModalityMonoclonal antibody

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment48

FDA Designations

No designations recorded

JST-018 clinical trials

JST-018 · 1 trial · 1 indication

Phase 1 1
NCT07595458Phase 1 Study on the Safety, Tolerability, and Pharmacokinetics of JST-018 in Healthy AdultsAntiviral Drug
RECRUITING48 Analytics
PHASE1RECRUITING
Phase 1 Study on the Safety, Tolerability, and Pharmacokinetics of JST-018 in Healthy Adults
Antiviral DrugUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety and tolerability of of JST-018 administered intramuscularly (IM)
From injection to Day 7

Incidence of solicited local (injection site) and systemic AEs post-injection through Day 7 (with the inpatient and outpatient participant diaries being collected on Day 3 and Day 8, respectively)

Safety and tolerability of of JST-018 administered IM
From injection to final visit at Week 48

Incidence of unsolicited AEs through end of study (EOS)

Safety and tolerability of JST-018 administered as IM
From injection to final visit at Week 48

Incidence of Clinically Significant Changes in Vital Sign Measurements

Secondary Endpoints

Pharmacokinetic Cmax of JST-018
From enrollment to the end of study at 48 weeks
Pharmacokinetic Tmax of JST-018
Time Frame: From enrollment to the end of study at 48 weeks
Pharmacokinetic Tlast of JST-018
From enrollment to the end of study at 48 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
JST-018 Investigational ProductACTIVE_COMPARATOR -
JST-017 PlaceboPLACEBO_COMPARATOR -

Interventions

NameTypeDescription
JST-018 combination of 3 monoclonal antibodiesBIOLOGICALMonoclonal antibodies
PlaceboDRUGPlacebo Comparator
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Eligibility Criteria

Age Range18 Years to 55 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. Healthy men or women 18 to 55 years of age 2. BMI between 18 and 32 kg/m2 3. Negative serum pregnancy test 4. 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 5. In g...

Countries:United States
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Recent Changes (Last 90 Days)

LOWAug 5, 2026NCT07595458startDate: changed
LOWAug 3, 2026NCT07595458Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 3, 2026NCT07595458Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 3, 2026NCT07595458Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about JST-018

What is JST-018?

JST-018 is an investigational monoclonal antibody combination developed by Evotec SE for antiviral use in infectious disease. It is a combination of three monoclonal antibodies and is currently in Phase 1 clinical development. It has not been approved by the FDA and remains under study in healthy adult volunteers.

What is JST-018 used for?

JST-018 is being developed as an antiviral drug for infectious disease, specifically targeting orthopoxviruses. Its only clinical study to date enrolls healthy adult volunteers rather than patients, so its use in treating any specific condition has not yet been established. It remains investigational.

What does JST-018 target?

JST-018 targets orthopoxviruses. It is a monoclonal antibody combination made up of three monoclonal antibodies directed at this virus class, which places it in the antiviral therapeutic area. Targeting the virus itself is the basis for its development as an infectious disease treatment.

Who is developing JST-018?

Evotec SE, which trades under the ticker EVO, is the developer of JST-018. The company is advancing the monoclonal antibody combination as an antiviral candidate for orthopoxviruses. It is the sole developer named for this asset.

What phase is JST-018 in?

JST-018 is in Phase 1 clinical development. It is investigational and has not been approved by the FDA. The program has one active trial and no completed trials, with a total planned enrollment of 48 participants across that study.

What clinical trials is JST-018 in?

JST-018 is being studied in NCT07595458, a Phase 1 trial titled a study on the safety, tolerability, and pharmacokinetics of JST-018 in healthy adults. The trial is recruiting in the United States, is randomized, double blind, and placebo controlled, and plans to enroll 48 participants aged 18 years and older.