A Study to Evaluate the Safety and Tolerability of Raxibacumab in Healthy Subjects

November 13, 2018 updated by: Human Genome Sciences Inc.

A Randomized, Single-blind, Placebo-controlled Study to Evaluate the Safety and Tolerability of Raxibacumab (Human Monoclonal Antibody to B. Anthracis Protective Antigen) in Healthy Subjects

To evaluate the safety and tolerability of raxibacumab in healthy subjects.

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.

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.
322

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 3

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

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Key Inclusion Criteria:

  • Male or female, 18 years of age or older
  • Normal laboratory (blood test) results
  • Subjects are eligible to enter the study if they are not pregnant or nursing, are sterile or of non-childbearing potential, or are willing to practice abstinence or use appropriate birth control methods during the study (about 2 months)

Key Exclusion Criteria:

  • History of significant, acute or chronic diseases (ie, heart, lung, gastrointestinal, liver, kidney, neurological or infectious diseases).
  • Prior immunization with anthrax vaccine adsorbed (AVA), prior treatment with investigational anthrax therapies, prior treatment for anthrax exposure, or prior anthrax infection.
  • History of Type I hypersensitivity reaction to food or drugs, IV contrast agents, antihistamines, or history of hives.
  • A current drug or alcohol addiction.
  • Positive for human immunodeficiency virus (HIV-1), Hepatitis B surface antigen, or Hepatitis C antibody.
  • Cancer within the last 5 years (with the exception of adequately treated basal cell carcinoma of the skin or in situ carcinoma of the cervix).
  • Participation within 60 days of intiating study or refusal to refrain from participation during the study in any other clinical trials of an investigational compound.
  • Previous exposure to raxibacumab.

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

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: 1
Drug: raxibacumab
40 mg/kg intravenously, double dose (day 0 and 14), Group 1
Drug: raxibacumab
40 mg/kg intravenously, single dose, day 0, Group 2
Experimental: 2
Drug: raxibacumab
40 mg/kg intravenously, double dose (day 0 and 14), Group 1
Drug: raxibacumab
40 mg/kg intravenously, single dose, day 0, Group 2
Placebo Comparator: 4
Drug: placebo
40 mg/kg intravenously, double dose (day 0 and 14), Group 3
Drug: placebo
40 mg/kg placebo, single dose (day 0), Group 4
Placebo Comparator: 3
Drug: placebo
40 mg/kg intravenously, double dose (day 0 and 14), Group 3
Drug: placebo
40 mg/kg placebo, single dose (day 0), Group 4

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 of Participants With Any Adverse Event (AE) or Any Serious Adverse Event (SAE) During the Treatment Period
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
An AE is defined as any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. This includes worsening (eg, increase in frequency or severity) of pre-existing conditions. A serious adverse event (SAE) is defined as any untoward medical occurrence that, at any dose, results in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or is a congenital anomaly/birth defect. Medical or scientific judgment should be exercised in deciding whether reporting is appropriate in other situations. Refer to the General Adverse AE/SAE module for a complete list of AEs and SAEs.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With Hematological Toxicities of the Indicated Grade
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Clinical hematological parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With at Least a 2-grade Worsening From Baseline in Hematological Toxicities
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
The number of participants with at least a 2-grade worsening from Baseline in hematological toxicities were assessed. Clinical hematological parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With Liver Toxicities of the Indicated Grade
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Liver function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With at Least a 2-grade Worsening From Baseline in Liver Toxicities
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
The number of participants with at least a 2-grade worsening from Baseline in liver toxicities were assessed. Liver function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With Electrolyte Toxicities of the Indicated Grade
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Electrolyte function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte Toxicities
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
The number of participants with at least a 2-grade worsening from Baseline in electrolyte toxicities were assessed. Electrolyte function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With Other Chemistry Toxicities of the Indicated Grade
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Other chemistry parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry Toxicities
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
The number of participants with at least a 2-grade worsening from Baseline in other chemistry toxicities were assessed. Other clinical chemistry parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With Thyroid Toxicities of the Indicated Grade
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Clinical thyroid parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With Urinalysis Toxicities of the Indicated Grade
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Urinaysis parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants With at Least a 2-grade Worsening From Baseline in Urinalysis Toxicities
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Urinalysis parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of Participants Who Developed an Anti-raxibacumab Antibody Response
Time Frame: From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)
Number of participants who developed an anti-raxibacumab antibody response during the study were assessed. .Immunogenicity testing was performed to determine if raxibacumab induced an anti-raxibacumab immune response. Testing comprised of 2 assays (screening and confirmatory). The screening assay (direct binding) was an electrochemiluminescence (ECL)-based bridging assay. A rabbit polyclonal antibody was used as a positive control. Samples above the assay cut point were considered positive. Samples identified as positive in the screening assay were confirmed positive in a confirmatory assay. Samples must have demonstrated a significant percent drop in the confirmatory inhibition of binding assay to be considered positive. The inhibition of binding confirmatory assay was performed identically to the direct binding screening assay with the exception that the samples were tested in parallel with excess unlabeled raxibacumab.
From the day of the first dose of study agent (Day 0) until Day 56 (single-dose) or until Day 70 (double-dose)

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
Mean Raxibacumab Concentration-time Following a Single IV Infusion Dose
Time Frame: Pre-dose on Day 0, at 30 minutes and 2 to 6 hours after completion of raxibacumab infusion, and at 14, 28, and 56 days after the raxibacumab dose
Blood was collected from each participant at selected times post dose, and serum specimens were analyzed for raxibacumab using a validated electrochemiluminescense-based assay. The individual serum raxibacumab concentration data were summarized by nominal collection time and treatment group using descriptive statistics. Blood samples for serum raxibacumab concentration measurement were collected from participants who received a single-dose prior to administration of the raxibacumab and diphenhydramine doses on Day 0, at 30 minutes and 2 to 6 hours after completion of the raxibacumab infusion, and at 14, 28, and 56 days after the raxibacumab dose.
Pre-dose on Day 0, at 30 minutes and 2 to 6 hours after completion of raxibacumab infusion, and at 14, 28, and 56 days after the raxibacumab dose
Mean Raxibacumab Concentration-time Following Two IV Infusion Doses
Time Frame: Pre-dose on Days 0 and 14, at 30 minutes and 2 to 6 hours after completion of each raxibacumab infusion, and at 28, 42, 56, and 70 days after the 1st raxibacumab dose
Blood was collected from each participant at selected times post dose, and serum specimens were analyzed for raxibacumab using a validated electrochemiluminescense-based assay. The individual serum raxibacumab concentration data were summarized by nominal collection time and treatment group using descriptive statistics. For the participants that received two doses, blood samples for serum raxibacumab concentration measurement were collected from participants prior to administration of the raxibacumab and diphenhydramine doses on Days 0 and 14, at 30 minutes and 2 to 6 hours after completion of each raxibacumab infusion, and at 28, 42, 56, and 70 days after the 1st raxibacumab dose.
Pre-dose on Days 0 and 14, at 30 minutes and 2 to 6 hours after completion of each raxibacumab infusion, and at 28, 42, 56, and 70 days after the 1st raxibacumab dose

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.
Human Genome Sciences Inc.

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.
GlaxoSmithKline
Emergent BioSolutions

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

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.
March 1, 2008

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.
July 1, 2008

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.
September 1, 2008

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).
March 13, 2008

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.
March 19, 2008

First Posted (Estimate)

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.
March 20, 2008

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.
November 15, 2018

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.
November 13, 2018

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, 2014

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.
  • HGS1021-C1063

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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