Safety, Tolerability, and Pharmacokinetics and Pharmacodynamics of TB31F (TB31F)

June 14, 2022 updated by: Radboud University Medical Center

Phase 1 Study to Evaluate the Safety, Tolerability, and Pharmacokinetics and Pharmacodynamics of Monoclonal Antibody TB31F in Healthy Malaria-naïve Adults in the Netherlands

This phase 1 study aims to assess the safety and tolerability of monoclonal antibody TB31F administered intravenously or subcutaneously at escalating dose levels in healthy, malaria naïve, adults. This study will also evaluate the pharmacokinetics of TB31F and the functional activity of mAb TB31F in the standard membrane feeding assay.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This phase 1 study aims to assess the safety and tolerability of monoclonal antibody (mAb) TB31F administered intravenously or subcutaneously in healthy, malaria naïve, adults at the Radboud University Medical Center (Radboudumc). Five groups will receive a single dose of mAb TB31F. Group 1 (n=5) will receive 0.1 mg/kg TB31F, Group 2 (n=5) will receive 1 mg/kg TB31F, group 3 (n=5) will receive 3 mg/kg TB31F, and group 4 (n=5) will receive 10 mg/kg mAb TB31F intravenously. Group 5 will receive 100mg TB31F subcutaneously. Twenty-five (n=25) subjects will be enrolled, as well as 1 reserve subject per group. Safety follow-up will be done at following times: baseline, end of infusion (EOI), 1, 3, 6 and 24 hours and 2, 7, 14, 21, 28, 56 and 84 days after administration. Extra follow-up visits at 4 and 10 days after administration for collection of serum/plasma for pharmacokinetic and pharmacodynamic measurements will be performed in group 5.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
25

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Netherlands
    • Gelderland
      • Nijmegen, Gelderland, Netherlands, 6525 GA
        • Radboud University Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 35 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Subject must sign written informed consent to participate in the trial.
  2. Subject is able to understand planned study procedures and demonstrate comprehension of the protocol procedures and knowledge of study by passing a quiz (assessment of understanding).
  3. In the opinion of the investigator, the subject can and will comply with the requirements of the protocol.
  4. Subjects are available to attend all study visits and are reachable by phone throughout the entire study period from day -1 until day 84 (end of study).
  5. The subject will remain within reasonable travelling distance from the study center from day -1 until day +7 after mAb TB31F infusion.
  6. Subject is a male or non-pregnant and non-lactating female age ≥ 18 and ≤ 35 years and in good health at time of mAb infusion.
  7. Subject agrees to their general practitioner (GP) being informed about participation in the study and agrees to sign a form to request the release by their GP, and medical specialist when necessary, of any relevant medical information concerning possible contra-indications for participation in the study to the investigator(s).
  8. The subject agrees to refrain from blood donation to Sanquin or for other purposes throughout the study period according to current Sanquin guidelines.
  9. Female subjects of non-childbearing potential may be enrolled in the study. Non-childbearing potential is defined as pre-menarche, current bilateral tubal ligation or occlusion, hysterectomy, bilateral ovariectomy or post-menopause. All subjects must agree to use continuous adequate contraception until 2 months after completion of the study. Female subjects must agree not to breastfeed from 30 days prior to mAb infusion until 2 months after completion of the study. Female subject must have a negative pregnancy test at the inclusion visit.

Exclusion Criteria:

  1. Acute or chronic disease at time of TB31F administration, clinically significant pulmonary, cardiovascular, hepatic or renal functional abnormality, as determined by physical examination or laboratory screening tests:

    1. Acute disease is defined as the presence of a moderate or severe illness with or without fever. Subjects with a minor illness on the day of TB31F administration will be (temporarily) excluded from participation, but may be re-evaluated for inclusion at a later date. Subjects with a positive SARS-CoV2 test at inclusion will be (temporarily) excluded from participation but may be re-evaluated for inclusion at a later date (following current Radboudumc guidelines).
    2. Fever is defined as an oral, axillary or tympanic temperature ≥ 38.0°C (100.4°F). The preferred route for recording temperature in this study will be oral.
    3. Any abnormal and clinically significant baseline laboratory screening tests of alanine aminotransferase, aspartate aminotransferase, creatinine, hemoglobin, platelet count or total white blood cell count, as defined in the protocol according to the FDA Toxicity Grading Scale for Healthy Adult and Adolescent Subjects Enrolled in Preventative Vaccine Clinical Trials.
  2. History of malignancy of any organ system (other than localized basal cell carcinoma of the skin), treated or untreated, within the past 5 years.
  3. Chronic use of i) immunosuppressive drugs, iii) or other immune modifying drugs within three months prior to study onset (inhaled and topical corticosteroids and oral anti-histamines exempted) or expected use of such during the study period.
  4. Positive urine toxicology test for cannabis, cocaine or amphetamines at screening or at inclusion.
  5. Screening tests positive for Human Immunodeficiency Virus (HIV), active Hepatitis B Virus (HBV), Hepatitis C Virus (HCV).
  6. Use of any investigational or non-registered product (drug or vaccine) during the study period other than the study product.
  7. Participation in any other clinical study in the 30 days prior to the start of the study or during the study period.
  8. Prior receipt of an investigational antimalarial monoclonal antibody.
  9. History of adverse reactions to monoclonal antibodies.
  10. Administration of immunoglobulin and/or any blood products within the three months preceding the first dose of study mAb or planned administration during the study period.
  11. Any history of malaria, positive serology for P. falciparum, or previous participation in any malaria (vaccine) study or Controlled Human Malaria Infection.
  12. Body weight >= 115 kg
  13. Being an employee or student of the department of Medical Microbiology or Medium Care of the Radboudumc, or a person otherwise related to the investigator other than a professional relationship for clinical trial purpose only.
  14. History of drug or alcohol abuse interfering with normal functioning in the period of one year prior to study onset.
  15. Any other condition or situation that would, in the opinion of the investigator, place the subject at an unacceptable risk of injury or render the subject unable to meet the requirements of the protocol.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Group 1 - 0.1mg/kg TB31F
0.1 mg/kg of monoclonal antibody TB31F is administered intravenously to 5 subjects. Subjects will be observed for the occurrence of any adverse events. There will be a minimum of 48 hours between TB31F administration to each subsequent volunteer. Subjects will be followed-up for 84 days. Escalation to the next higher dosage group will be dependent upon no safety signals arising.
Biological: TB31F
Monoclonal antibody
Experimental: Group 2 - 1mg/kg TB31F
1 mg/kg of monoclonal antibody TB31F is administered intravenously to 5 subjects. TB31F administration will be staggered such that the first subject will be administered mAb TB31F and observed for the occurrence of any adverse events. The second subject will not receive their dose of TB31F sooner than 2 days after the first subject has received TB31F. The remaining three subjects will receive their TB31F dose no sooner than 2 days after the second subject has been administered TB31F, with at least a one hour interval in administration of TB31F between each subject. Subjects will be followed-up for 84 days. Escalation to the next higher dosage group will be dependent upon no safety signals arising.
Biological: TB31F
Monoclonal antibody
Experimental: Group 3 - 3mg/kg TB31F
3 mg/kg of monoclonal antibody TB31F is administered intravenously to 5 subjects. TB31F administration will be staggered such that the first subject will be administered mAb TB31F and observed for the occurrence of any adverse events. The second subject will not receive their dose of TB31F sooner than 2 days after the first subject has received TB31F. The remaining three subjects will receive their TB31F dose no sooner than 2 days after the second subject has been administered TB31F, with at least a one hour interval in administration of TB31F between each subject. Subjects will be followed-up for 84 days. Escalation to the next higher dosage group will be dependent upon no safety signals arising.
Biological: TB31F
Monoclonal antibody
Experimental: Group 4 - 10mg/kg TB31F
10 mg/kg of monoclonal antibody TB31F is administered intravenously to 5 subjects. TB31F administration will be staggered such that the first subject will be administered mAb TB31F and observed for the occurrence of any adverse events. The second subject will not receive their dose of TB31F sooner than 2 days after the first subject has received TB31F. The remaining three subjects will receive their TB31F dose no sooner than 2 days after the second subject has been administered TB31F, with at least a one hour interval in administration of TB31F between each subject. Subjects will be followed-up for 84 days.
Biological: TB31F
Monoclonal antibody
Experimental: Group 5 - 100mg TB31F
100mg of monoclonal antibody TB31F is administered subcutaneously to 5 subjects. TB31F administration will be staggered such that the first subject will be administered mAb TB31F and observed for the occurrence of any adverse events. The second subject will not receive their dose of TB31F sooner than 2 days after the first subject has received TB31F. The remaining three subjects will receive their TB31F dose no sooner than 2 days after the second subject has been administered TB31F, with at least a one hour interval in administration of TB31F between each subject. Subjects will be followed-up for 84 days.
Biological: TB31F
Monoclonal antibody

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Number and Severity of Adverse Events After TB31F Administration
Time Frame: Throughout study: solicited local adverse events (day 0 - day 7); solicited general adverse events and clinically significant laboratory abnormalities (day 0 - day 28); unsolicited adverse events (day 0 - day 84), serious adverse events (day 0 - day 84)
  • Number and severity of solicited local adverse events of all severities from first product administration through day 7;
  • Number and severity of solicited general adverse events and clinically significant hematological and biochemical laboratory abnormalities from first product administration through day 28;
  • Number and severity of unsolicited adverse events from first product administration through end of study;
  • Occurrence of serious adverse events from first product administration through end of study
Throughout study: solicited local adverse events (day 0 - day 7); solicited general adverse events and clinically significant laboratory abnormalities (day 0 - day 28); unsolicited adverse events (day 0 - day 84), serious adverse events (day 0 - day 84)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Serum Concentration of TB31F
Time Frame: All groups: 6 hours, 24 hours, 48 hours, day 7, day 14, day 21, day 28, day 56, day 84. Groups 1-4 only: end of infusion, 1 hour, 3 hours. Group 5 only: day 4 and day 10.
The serum concentration of TB31F will be measured in all subjects throughout the study (until day 84) by Pfs48/45 antigen ELISA.
All groups: 6 hours, 24 hours, 48 hours, day 7, day 14, day 21, day 28, day 56, day 84. Groups 1-4 only: end of infusion, 1 hour, 3 hours. Group 5 only: day 4 and day 10.
Pharmacodynamics/Functional Transmission-reducing Activity of TB31F
Time Frame: Groups 1 to 4: throughout study until day 84 (baseline, end of infusion, day 7, day 28, day 56, day 84). Group 5: baseline, day 2, day 4, day 7. day 10, day 14, day 28, day 56, day 84.
Transmission-reducing activity (TRA) of serum TB31F will be assessed in all subjects throughout the study (until day 84) by standard membrane feeding assays (SMFA). TRA is expressed as the percentage reduction in oocysts in mosquitoes fed on gametocytes in the presence of participants' serum, compared to oocysts in mosquitoes fed on gametocytes in the presence of pooled naïve serum (control). Given the limited precision of low TRA estimates and the historical threshold value of >80% TRA to support clinical development of transmission-blocking vaccines, TRA >80% was pre-defined as the efficacy threshold of interest.
Groups 1 to 4: throughout study until day 84 (baseline, end of infusion, day 7, day 28, day 56, day 84). Group 5: baseline, day 2, day 4, day 7. day 10, day 14, day 28, day 56, day 84.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Radboud University Medical Center

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
The PATH Malaria Vaccine Initiative (MVI)

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 14, 2020

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
March 4, 2021

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 4, 2021

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 23, 2019

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 22, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 23, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 27, 2023

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 14, 2022

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • NL69779.091.19

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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