Phase 1, Randomized, Double-Blind, Placebo-controlled Study to Evaluate the Safety and Tolerability of an Enterovirus D68-specific Monoclonal Antibody in Healthy Adults

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

COMPLETED

Clinical Phase

PHASE1

Total Enrollment

36 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-06-26

Study Completion Date

2025-04-11

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

This is a Phase 1, randomized, placebo-controlled, double-blinded study to assess the safety and pharmacokinetics of single IV administrations of EV68-228-N in healthy adult volunteers. Three doses (3, 10 and 30 mg/kg) of EV68-228-N will be evaluated in three separate, sequential cohorts in this single dose escalation study. The cohorts will be randomized in a 5:1 randomization scheme. The first two participants in each cohort will serve as sentinels. Sentinel participants may be located at different sites. Sentinel safety data will be collected through Day 3 before submitting to the Protocol Safety Review Team (PSRT) for review. The PSRT is comprised of the Principal Investigator (PI), the DMID Medical Monitor, and the DMID Medical Officer. Data to be reviewed will include clinical data collected from Visits 1, 2 and 3, the results of laboratory testing conducted at these visits, solicited adverse events (AEs) and the passive reporting of adverse events through Day 3. From the time of infusion of the sentinels to at least 48 hours after infusion, no new participants will be given study product or placebo, but screening may continue. If no safety signal is detected in the sentinel group, and after approval from the DMID Medical Monitor, the remaining 10 participants in the cohort will be dosed following the overall 5:1 randomization scheme. All participants will be actively monitored for AEs and safety laboratory data following dosing through Day 8. Data will be reviewed by the PSRT and discussed with the Safety Monitoring Committee (SMC) for their concurrence before advancing to the next cohort. Electronic review of the safety data by the SMC is required prior to the cohort dose escalation when halting rules are met or there are any safety concerns. The primary objective is to evaluate the safety of a single IV infusion of either 3, 10, or 30 mg/kg of EV68-228-N when administered to healthy adults.

Related Clinical Trials

Explore similar clinical trials based on study characteristics and research focus.

Safety and Immunogenicity of Norovirus Bivalent Virus-Like Particle Vaccine in Healthy Adults

NCT02142504

Norovirus Prevention

COMPLETED PHASE2

Bivalent Norovirus Vaccine Study

NCT01168401

Gastroenteritis

COMPLETED PHASE1

Evaluation of the Safety of a Polyvalent Virus in Healthy Adults

NCT00187044

HIV Infection Human Immunodeficiency Virus

COMPLETED PHASE1

Experimental Vaccine for Prevention of Ebola Virus Infection

NCT00374309

Ebola Hemorrhagic Fever Ebola Virus Disease Ebola Virus Vaccines +2 more

COMPLETED PHASE1

Safety and Pharmacokinetics of a Human Monoclonal Antibody, VRC-EBOMAB092-00-AB (MAb114), Administered Intravenously to Healthy Adults

NCT03478891

Healthy Adult Immune Responses to Vaccine

COMPLETED PHASE1

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

This is a Phase 1, randomized, placebo-controlled, double-blinded study to assess the safety and pharmacokinetics of single IV administrations of EV68-228-N in healthy adult volunteers. Three doses (3, 10 and 30 mg/kg) of EV68-228-N will be evaluated in three separate, sequential cohorts in this single dose escalation study. The cohorts will be randomized in a 5:1 randomization scheme. The first two participants in each cohort will serve as sentinels. Sentinel participants may be located at different sites. Sentinel safety data will be collected through Day 3 before submitting to the Protocol Safety Review Team (PSRT) for review. The PSRT is comprised of the Principal Investigator (PI), the DMID Medical Monitor, and the DMID Medical Officer. Data to be reviewed will include clinical data collected from Visits 1, 2 and 3, the results of laboratory testing conducted at these visits, solicited adverse events (AEs) and the passive reporting of adverse events through Day 3. From the time of infusion of the sentinels to at least 48 hours after infusion, no new participants will be given study product or placebo, but screening may continue. If no safety signal is detected in the sentinel group, and after approval from the DMID Medical Monitor, the remaining 10 participants in the cohort will be dosed following the overall 5:1 randomization scheme. All participants will be actively monitored for adverse events (AEs) and safety laboratory data following dosing through Day 8. Data will be reviewed by the PSRT and discussed with the Safety Monitoring Committee (SMC) for their concurrence before advancing to the next cohort. Electronic review of the safety data by the SMC is required prior to the cohort dose escalation when halting rules are met or there are any safety concerns. Assuming no safety concerns are identified after review of the first cohort safety data through Day 8, enrollment of Cohort 2 will begin. The dose of EV68-228-N will be increased to 10 mg/kg for the second cohort. The same sentinel design and safety plan will be used to evaluate sentinel participants in Cohort 2 and determine whether to enroll the remaining participants in Cohort 2. In addition, the same sentinel design and safety plan will be used for Cohort 3, which will evaluate the 30 mg/kg dose. Following informed consent, participants will be screened for eligibility, including medical history, physical examination, weight and height measurements, vital signs, screening laboratory tests, and a 12-lead electrocardiogram (ECG). Within 28 days of screening, eligible participants will be seen at the clinical research unit (Day 1) and be randomized to receive either a single intravenous dose of EV68-228-N or placebo (formulation buffer alone). Participants will remain in the unit for at least 5 hours following infusion and return for assessments on Day 2 and Day 3. Participants will have subsequent follow-up clinic visits on Days 8, 15, 29, 61, 91, and 121. Participants will be monitored and assessed for safety and the incidence of adverse events (AEs) at all visits beginning with the dosing visit. An electronic memory aid will be utilized from Day 1 through Day 3 to assist with collecting solicited adverse events (AEs). Safety laboratory studies will be collected at screening and on Days 1, 2, 3, 8, and 29. Concomitant medications taken 28 days before and after dosing will be recorded. Pharmacokinetic (PK) samples will be collected prior to infusion, end of infusion, 1, 3, 5, 24 and 48 hours after end of infusion; and on Days 8, 15, 29, 61, 91, and 121. The single dose pharmacokinetic (PK) parameters to be estimated include maximum observed serum concentration (Cmax), time to Cmax (Tmax), area under the serum concentration-time curve (AUC) from time zero to time t (AUC0-t), from time zero to 48 hours post infusion \[AUC(0-48)\], from time zero to the last measurable concentration \[AUC(0-tlast)\] and extrapolated to infinity \[AUC(0-oo)\], apparent serum terminal elimination phase half-life (t\^1/2), total serum clearance (CL), and volume of distribution during the terminal phase (Vz). PK parameters will be calculated from serum EV68-228-N levels measured using an electrochemiluminescence (ECL) enzyme-linked immunosorbent assay (ELISA). Samples will be collected prior to infusion on Day 1 and on Days 8, 15, 29, 61, 91 and 121 for serum levels of anti-EV68-228-N antibodies. A sample will be collected pre-infusion on Day 1 for hypersensitivity testing in the event that the participant experiences an infusion reaction. These baseline samples will only be analyzed in the event of a hypersensitivity reaction related to the infusion. If a participant experiences anaphylaxis or an anaphylactoid event related to the infusion, three additional samples will be collected: 1) during onset, 2) 2 or more hours after onset, and 3) after resolution of symptoms. The primary objective is to evaluate the safety of a single IV infusion of either 3, 10, or 30 mg/kg of EV68-228-N when administered to healthy adults. The secondary objective is to: 1) characterize the PK of single ascending doses of EV68-228-N for approximately four months following the infusion and 2) measure the occurrence of anti-drug antibodies (ADAs) elicited following a single IV infusion of EV68-228-N in healthy adults.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Enterovirus Infection

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Participants, investigators, study personnel performing any study-related assessments following study product administration, and laboratory personnel will be blinded to treatment assignments.

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

Cohort 1A

Healthy adult participants will be randomized at a 5:1 ratio. 10 participants to receive a 3 mg/kg single intravenous infusion of EV68-228-N and 2 Participants matching Placebo (20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80)

Group Type EXPERIMENTAL

EV68-228-N

Intervention Type BIOLOGICAL

EV68-228-N is a recombinant human monoclonal IgG1 antibody which is produced by genetically engineered plasmids in Nicotiana benthamiana. This intervention is directed against enterovirus EV-D68 capsid protein potentially providing treatments for EV-D68 infection and AMF.

Cohort 1B

Healthy adult participants will be randomized at a 5:1 ratio. 10 participants to receive a 3 mg/kg single intravenous infusion of EV68-228-N and 2 Participants matching Placebo (20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80)

Group Type PLACEBO_COMPARATOR

Placebo for EV68-228-N

Intervention Type OTHER

The placebo is a sterile buffer solution formulated to match the EV68-228-N Drug Product. The formulation is 20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80, with a target pH of 5.5. The placebo will be filled into glass vials at 10 mL per vial. The formulation buffer is a clear colorless liquid.

Cohort 2A

Healthy adult participants will be randomized at a 5:1 ratio to receive a single intravenous infusion of EV68-228-N and Placebo (20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80) 10 mg/kg. N=2

Group Type EXPERIMENTAL

EV68-228-N

Intervention Type BIOLOGICAL

EV68-228-N is a recombinant human monoclonal IgG1 antibody which is produced by genetically engineered plasmids in Nicotiana benthamiana. This intervention is directed against enterovirus EV-D68 capsid protein potentially providing treatments for EV-D68 infection and AMF.

Cohort 2B

Healthy adult participants will be randomized at a 5:1 ratio to receive a single intravenous infusion of EV68-228-N and Placebo (20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80) 10 mg/kg. N=2

Group Type PLACEBO_COMPARATOR

Placebo for EV68-228-N

Intervention Type OTHER

The placebo is a sterile buffer solution formulated to match the EV68-228-N Drug Product. The formulation is 20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80, with a target pH of 5.5. The placebo will be filled into glass vials at 10 mL per vial. The formulation buffer is a clear colorless liquid.

Cohort 3A

Healthy adult participants will be randomized at a 5:1 ratio to receive a single intravenous infusion of EV68-228-N N=10 and Placebo (20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80) 30 mg/kg. N=2

Group Type EXPERIMENTAL

EV68-228-N

Intervention Type BIOLOGICAL

EV68-228-N is a recombinant human monoclonal IgG1 antibody which is produced by genetically engineered plasmids in Nicotiana benthamiana. This intervention is directed against enterovirus EV-D68 capsid protein potentially providing treatments for EV-D68 infection and AMF.

Cohort 3B

Healthy adult participants will be randomized at a 5:1 ratio to receive a single intravenous infusion of EV68-228-N N=10 and Placebo (20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80) 30 mg/kg. N=2

Group Type PLACEBO_COMPARATOR

Placebo for EV68-228-N

Intervention Type OTHER

The placebo is a sterile buffer solution formulated to match the EV68-228-N Drug Product. The formulation is 20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80, with a target pH of 5.5. The placebo will be filled into glass vials at 10 mL per vial. The formulation buffer is a clear colorless liquid.

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

EV68-228-N

EV68-228-N is a recombinant human monoclonal IgG1 antibody which is produced by genetically engineered plasmids in Nicotiana benthamiana. This intervention is directed against enterovirus EV-D68 capsid protein potentially providing treatments for EV-D68 infection and AMF.

Intervention Type BIOLOGICAL

Placebo for EV68-228-N

The placebo is a sterile buffer solution formulated to match the EV68-228-N Drug Product. The formulation is 20mM Citrate + 10 mM Glycine, 8% Sucrose, and 0.01% Polysorbate 80, with a target pH of 5.5. The placebo will be filled into glass vials at 10 mL per vial. The formulation buffer is a clear colorless liquid.

Intervention Type OTHER

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

1. Provides written informed consent prior to initiation of any study procedures.
2. Is able to understand and agrees to adhere to planned study procedures and is available for all study visits.
3. Adult volunteers 18 to 49 years of age, inclusive.
4. Females who are of childbearing potential must agree not to become pregnant. Not of childbearing potential includes post-menopausal females (defined as no menses for at least 12 months without an alternative medical cause for amenorrhea) or surgically sterile females with documented history of hysterectomy, bilateral oophorectomy, tubal ligation/salpingectomy, or Essure(R) placement.
5. Females who have sexual intercourse with male partners must agree to use at least one acceptable form of contraception for the duration of the study.

Acceptable methods of birth control include long-acting reversible contraception (LARC), combined pill, progestin-only pill, hormone-releasing transdermal patch or vaginal ring, and depot medroxyprogesterone acetate (DMPA) injection. Participants who choose to use a licensed hormonal product should use them for a minimum of 28 days prior to study infusion. True sexual abstinence or a monogamous relationship with a vasectomized partner who has been vasectomized for 180 days or more prior to the participant's first infusion are also acceptable contraceptive methods.

Participants who report practicing true abstinence, defined as no heterosexual vaginal-penile intercourse, need to practice true abstinence at all times during the study. Periodic abstinence (e.g., calendar, ovulation, symptothermal, post-ovulation methods) and the withdrawal method are not acceptable methods of contraception.
6. Females of childbearing potential must agree to not donate ova or oocytes during the study.

Exclusion Criteria

8. Must agree to refrain from donating blood or blood products during the study. This includes whole blood cells, red blood cells, platelets, plasma, and plasma derivatives collected and donated outside of the study blood draws.
9. Body mass index (BMI) 18 kg/m2 to 32 kg/m2, inclusive, and a weight of 125 kg or less at time of screening.
10. Must have adequate venous access for intravenous (IV) infusion and blood sampling.

1. Positive pregnancy test at screening or prior to infusion.
2. Female participant who is lactating.
3. Presence of significant psychiatric condition, that in the opinion of the site PI or appropriate sub-investigator, precludes study participation.
4. History of drug abuse or alcohol abuse within 6 months of enrollment that, in the opinion of the site PI or appropriate sub-investigator, precludes study participation.
5. Has a significant acute illness (with or without fever), as determined by the site PI or appropriate sub-investigator, within 72 hours prior to infusion.

If the participant meets all other eligibility criteria, they may be enrolled and dosed once they meet this eligibility criterion. If the illness resolves within the 28-day screening window, they do not need to be rescreened, otherwise they will need to be rescreened.
6. Currently enrolled in or plans to participate in another clinical trial with an investigational agent that will be received during the study-reporting period.
7. Has a history of significant hypersensitivity, intolerance, or allergy to any drug compound, vaccine, food, or other substance, unless approved by the Investigator (or designee).

Sensitivity to glycine, citric acid, trisodium citrate, sorbitol, or polysorbate 80 (components of the study product) is exclusionary.
8. Any history of an infusion reaction to any biologic product.
9. Receipt of a monoclonal antibody in the 180 days prior to infusion.
10. Receipt of a blood product within 120 days prior to infusion.
11. Received any live-attenuated vaccine in the 28 days prior or any other vaccine in the 14 days prior to infusion.
12. Has used any prohibited medication within 30 days prior to Day 1 or plans to use prohibited medication during the study.

Prohibited medications include systemic immunosuppressive drugs, immune modulators (except acetaminophen or non-steroidal anti-inflammatory drugs), oral corticosteroids, and systemic anti-neoplastic agents. Topical, inhaled, and intranasal steroids, as well as topical anti-neoplastic agents are acceptable.
13. Has clinically significant findings on 12-lead electrocardiogram. Clinical significance will be determined by a cardiologist. Examples of findings that will lead to exclusion are significant left ventricular hypertrophy, right or left bundle branch block, advanced A-V heart block, non-sinus rhythm (excluding isolated premature atrial contractions), pathologic Q wave abnormalities, significant ST-T wave changes, and prolonged QTc interval. Long QT interval is defined in males as a median QTcB greater than 450 msec or in females as a median QTcB greater than 460 msec (Bazett's correction) at screening.
14. Abnormal vital signs (Grade 1 or higher) at screening or on Day 1.

Grade 1 or higher is equivalent to:

Systolic blood pressure (SBP) \> 140 mmHg or \< 85 mmHg Diastolic blood pressure (DBP) \> 90 mmHg Oral temperature \>/= 38.0 degrees Celsius (100.4 degrees Fahrenheit)
15. Abnormal laboratory results that are Grade 1 or worse at screening based on the Toxicity Tables in Appendix B7.

Creatinine, alanine transaminase (ALT), hemoglobin (Hgb), platelets (PLT), white blood cell count (WBC), and total bilirubin (T bili).

Laboratory studies can be repeated once if an alternative, transient etiology for abnormal laboratory values is identified.
16. Known, current human immunodeficiency virus (HIV), hepatitis B Virus (HBV), or hepatitis C virus (HCV) infection
17. Has any medical disease or condition that, in the opinion of the site PI or appropriate sub-investigator, precludes study participation.

Medical conditions include, but are not limited to, kidney disease with creatinine clearance \< 90 mL/min/1.73 cm2 (CKD-EPI method); known active liver disease including steatosis; ischemic heart disease, clinically significant cardiac conduction disorder, arrhythmia requiring treatment, congenital long QT syndrome, uncompensated heart failure; diabetes requiring insulin; neuropathy or myopathy; and malignancy (not including squamous cell skin cancer, basal cell skin cancer, or cervical low-grade squamous intraepithelial lesions).

Participation may be precluded due to safety concerns or inability to adequately evaluate clinical trial endpoints.

Minimum Eligible Age

18 Years

Maximum Eligible Age

49 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes