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TerminatedNCT04548791Updated Dec 21, 2021

Study of Coagulation Factor VIIa Marzeptacog Alfa (Activated) in Subjects With Inherited Bleeding Disorders

A Phase 1/2 interventional study of Coagulation Factor VIIa variant in Factor VII Deficiency, Glanzmann Thrombasthenia and Hemophilia A With Inhibitor, sponsored by Catalyst Biosciences. Terminated at 20 sites in 5 countries. Open to participants aged 12 Years and older. Per ClinicalTrials.gov, last updated 2021-12-21.

Sponsored by Catalyst Biosciences · Phase 1/2, Interventional, and Treatment

Why this study was terminated
Company decision (not a safety issue)

From the registry’s dates

  • Primary completion was Nov 2021, 4 years 10 months ago, and no results have been posted to the registry.
Phase
Phase 1/2
Study type
Interventional
Enrollment
19
Allocation
Non-randomized
Ages
12 Years and older
Sex
All
01

Study summary

The purpose of the trial is to evaluate the PK, bioavailability, PD, efficacy and safety of MarzAA for on demand treatment and control of bleeding episodes in adult subjects with inherited bleeding disorders.

02

Conditions studied

  • Factor VII Deficiency
  • Glanzmann Thrombasthenia
  • Hemophilia A With Inhibitor
03

In context

Hemostatic Disorders

503 studies on the registry are indexed under Hemostatic Disorders; 71 are open to participants now.

This study's enrollment of 19 is below the median of 51 across 253 interventional studies indexed under Hemostatic Disorders.

Browse Hemostatic Disorders studies →

Lead sponsor

Catalyst Biosciences is the lead sponsor of 8 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
12 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Diagnosis of cohort: FVII deficiency, Glanzmann Thrombasthenia, or hemophilia A with inhibitors
  • Male or female, age 12 or older
  • History of frequent bleeding episodes
  • Affirmation of informed consent with signature confirmation and assent for children between ages 12 to 17 before any study related activities
  • Agreement to use highly effective birth control throughout the study if the subject has childbearing potential

Exclusion criteria

Exclusion Criteria:

  • Genotype of FVIID subjects with identified mutations by central lab at screening
  • Previous participation in a clinical trial evaluating a modified rFVIIa agent
  • Received an investigational drug within 30 days or 5 half-lives or absence of clinical effect, whichever is longer
  • Known hypersensitivity to trial or related product
  • Known positive antibody to FVII or FVIIa detected by central lab at screening
  • Be immunosuppressed
  • Significant contraindication to participate
05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
19 participants (actual)

Study arms

  • Experimental
    Cohort 1

    For Phase 1, a Coagulation Factor VIIa variant by intravenous route, 18 μg/kg, followed by ascending doses by subcutaneous route, 10 μg/kg, 20 μg/kg, 30 μg/kg, 40 μg/kg, and 60 μg/kg, for PK and PD assessment. For Phase 2, Coagulation Factor VIIa, 20 μg/kg by subcutaneous route, administered on demand during bleeding episodes for a maximum of 3 doses as needed for hemostasis.

    Biological: Coagulation Factor VIIa variant

  • Experimental
    Cohort 2

    For Phase 1, a Coagulation Factor VIIa variant by intravenous route, 18 μg/kg, followed by ascending doses by subcutaneous route, 30 μg/kg, 45 μg/kg, 60 μg/kg, 120 μg/kg, and 180 μg/kg, for PK and PD assessment. For Phase 2, Coagulation Factor VIIa, 60 μg/kg by subcutaneous route, administered on demand during bleeding episodes for a maximum of 3 doses as needed for hemostasis.

    Biological: Coagulation Factor VIIa variant

  • Experimental
    Cohort 3

    For Phase 1, a Coagulation Factor VIIa variant by intravenous route, 18 μg/kg, followed by ascending doses by subcutaneous route, 30 μg/kg, 45 μg/kg, 60 μg/kg, 120 μg/kg, and 180 μg/kg, for PK and PD assessment. For Phase 2, Coagulation Factor VIIa, 60 μg/kg by subcutaneous route, administered on demand during bleeding episodes for a maximum of 3 doses as needed for hemostasis.

    Biological: Coagulation Factor VIIa variant

Interventions

  • BiologicalCoagulation Factor VIIa variant

    Single intravenous dose and ascending doses of subcutaneous injection of MarzAA, followed by a fixed dose of MarzAA for the treatment of bleeding episodes

    Also known as: MarzAA

06

What researchers measure

Primary outcomes

  1. Comparative MarzAA activity by dose level/stage and confirm the Phase 2 dose

    Comparative pharmacokinetics by dose level/stage based on examination of AUX for each of the dose groups in each cohort.

    Time frame: Dosing period for each stage in a cohort will be approximately 5 to 11 days

  2. Bleeding episode treatment success

    Proportion of bleeding events treated with MarzAA achieving hemostatic efficacy based on a four-point scale according to the Investigator's assessment

    Time frame: 24 hours after the first administration of study drug

07

Study locations

20 sites
  • UC Davis Medical Center
    Sacramento, California 95817, United States
  • University of California -San Francisco
    San Francisco, California 94143, United States
  • University of Colorado Hemophilia and Thrombosis Center
    Aurora, Colorado 80045, United States
  • Rush University
    Chicago, Illinois 60612, United States
  • Children's Hospital of Michigan
    Detroit, Michigan 48201, United States
  • Michigan State University Center for Bleeding Disorders & Clotting Disorders
    East Lansing, Michigan 49805, United States
  • East Carolina University
    Greenville, North Carolina 27858, United States
  • Mazumdar Shaw Medical Centre
    Bengaluru, India
  • St. John's Medical College Hospital
    Bengaluru, India
  • Amrita Institute of Medical Sciences and Research Centre
    Kochi, India
  • K. J. Somaiya Hospital and Research Centre
    Mumbai, India
  • Sahyadri Super Speciality Hospital
    Pune, India
  • Careggi University Hospital
    Florence, Italy
  • Center for Thrombosis and Haemorrhagic Diseases
    Milan, Italy
  • Maggiore Polyclinic Hospital, IRCCS Ca' Granda
    Milan, Italy
  • Children's Hospital BambiNo Gesù, IRCCS (PEDS)
    Roma, Italy
  • City of Health and Science of Turin
    Turin, Italy
  • Territorial Clinical Hospital
    Barnaul, Russian Federation
  • National Medical Hematology Research Center under the Ministry of Healthcare of the Russian Federation
    Moscow, Russian Federation
  • Institute of Blood Pathology and Transfusion Medicine, Department of Surgery and Clinical Transfusiology
    Lviv, Ukraine
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 21, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04548791
Lead sponsor
Catalyst Biosciences
Responsible party
Sponsor
First posted
Sep 16, 2020
Start date
May 17, 2021
Primary completion
Nov 15, 2021
Completion
Dec 3, 2021
Last update
Dec 21, 2021

Oversight

FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Dec 2021. You cannot join it, but the record below documents what was studied.

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