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Recombinant Human Antithrombin (rhAT) in Patients With Hereditary Antithrombin Deficiency Undergoing Surgery or Delivery

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00110513
Recruitment Status : Completed
First Posted : May 11, 2005
Results First Posted : May 11, 2012
Last Update Posted : August 17, 2012
Information provided by (Responsible Party):
rEVO Biologics

Tracking Information
First Submitted Date  ICMJE May 10, 2005
First Posted Date  ICMJE May 11, 2005
Results First Submitted Date  ICMJE March 19, 2012
Results First Posted Date  ICMJE May 11, 2012
Last Update Posted Date August 17, 2012
Study Start Date  ICMJE April 2005
Actual Primary Completion Date May 2008   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: April 13, 2012)
Incidence of Thromboembolic Events Acute Deep Venous Thrombosis (DVT) and/or Thromboembolic Events Other Than Acute Deep Venous Thrombosis (DVT) [ Time Frame: During treatment and follow up period of 7 days ]
To assess the incidence of thromboembolic events acute deep venous thrombosis (DVT) and/or thromboembolic events other than acute deep venous thrombosis (DVT) by clinical signs and symptoms of venous thromboembolism (VTE), confirmed by diagnostic assessments.
Original Primary Outcome Measures  ICMJE Not Provided
Change History Complete list of historical versions of study NCT00110513 on Archive Site
Current Secondary Outcome Measures  ICMJE Not Provided
Original Secondary Outcome Measures  ICMJE Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE Recombinant Human Antithrombin (rhAT) in Patients With Hereditary Antithrombin Deficiency Undergoing Surgery or Delivery
Official Title  ICMJE A Multicenter, Multinational Study to Assess the Safety and Efficacy of Antithrombin Alfa in Hereditary Antithrombin (AT) Deficient Patients in High-Risk Situations for Thrombosis
Brief Summary Patients with hereditary antithrombin deficiency are at increased risk of venous thrombosis and pulmonary embolism, particularly during certain high risk procedures. The trial focused on patients with confirmed hereditary antithrombin deficiency who were undergoing a surgical procedure or induced/spontaneous labor and delivery, and/or caesarean section. The study assessed the incidence of thromboembolic events following prophylactic intravenous administration of recombinant human antithrombin (rhAT) to patients with hereditary antithrombin (AT) deficiency in situations usually associated with a high risk for thromboembolic events.
Detailed Description

GTC Biotherapeutics established clinical trial sites in Europe, Canada, Australia, Austria and Canada. GTC Biotherapeutics provided an international clinical team to support site registration requirements once a patient was identified for treatment. GTC Biotherapeutics also provided consultation to help evaluate patient eligibility.

In September 2006, GTC Biotherapeutics modified exclusion criteria 1 (below) to allow for the participation of previously excluded patients with the hereditary thrombophilic disorders Factor V Leiden and prothrombin gene mutation (G20210A).

Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 3
Study Design  ICMJE Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Condition  ICMJE Antithrombin III Deficiency
Intervention  ICMJE Biological: Recombinant human antithrombin (rhAT)
Up to 24 hours prior to the scheduled elective surgical procedure, caesarean section, or delivery induction, each patient will receive an initial intravenous loading dose followed by a continuous intravenous infusion of recombinant human antithrombin (rhAT) that will target and maintain an AT activity that is > 80% and < 120% of normal. The dosing objective for all study patients is maintenance of the AT activity at > 80% and < 120% of normal during the high-risk period for thromboembolic events. Dosing and dose adjustments will be based on the results of AT activity determinations performed prior to and during treatment.
Other Name: Recombinant human antithrombin (Tradename: ATryn)
Study Arms  ICMJE Experimental: Recombinant Human Antithrombin (rhAT) Infusion
Intravenous infusion of rhAT.
Intervention: Biological: Recombinant human antithrombin (rhAT)
Publications * DeJongh J, Frieling J, Lowry S, Drenth HJ. Pharmacokinetics of recombinant human antithrombin in delivery and surgery patients with hereditary antithrombin deficiency. Clin Appl Thromb Hemost. 2014 May;20(4):355-64. doi: 10.1177/1076029613516188. Epub 2013 Dec 11.

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Completed
Actual Enrollment  ICMJE
 (submitted: April 13, 2012)
Original Enrollment  ICMJE Not Provided
Actual Study Completion Date  ICMJE July 2008
Actual Primary Completion Date May 2008   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion Criteria:

  1. Have hereditary antithrombin deficiency (HD) with a personal history of venous thromboembolic events.
  2. Have a history of HD that includes 2 or more plasma AT activity values ≤ 60%.
  3. Be scheduled to have an elective procedure(s) known to be associated with a high risk for occurrence for DVT. This will include non-pregnant surgical patients or pregnant patients scheduled for caesarean section or delivery induction.
  4. Be at least 18 years of age, not exceeding 80 years of age.
  5. Have signed an informed consent form.
  6. Have a negative serum pregnancy test at screening and a negative urine pregnancy test at baseline. This applies only to female non-pregnant surgical patients of childbearing potential.
  7. Are able to comply with the requirements of the study protocol.

In addition, hospitalized pregnant HD patients in active labor and eligible HD patients previously treated with rhAT were allowed entry into the study.

Exclusion Criteria:

  1. Patients who have a diagnosis of another hereditary thrombophilic disorder (e.g. activated protein C(APC) resistance/Factor V Leiden, Protein S or C deficiency, prothrombin gene mutation (G20210A), or acquired (lupus anticoagulant) thrombophilic disorder).
  2. Patients who have a baseline bilateral ultrasound positive for acute DVT or baseline diagnostic testing (if required) that is positive for a thromboembolic event other than acute DVT.
  3. Patients who have a known allergy to goats or goat products.
  4. Patients who have participated in a study employing a different investigational drug within 30 days of the start of their participation in the current trial.
  5. Patients using fondaparinux sodium or the oral thrombin inhibitor, ximelagatran, or are expected to be treated with fondaparinux sodium or ximelagatran during the study period (up to 7 days after stop of treatment).
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 18 Years to 80 Years   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Australia,   Austria,   Canada,   France,   Germany,   Italy,   United Kingdom,   United States
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT00110513
Other Study ID Numbers  ICMJE GTC AT HD 012-04
Has Data Monitoring Committee No
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party rEVO Biologics
Study Sponsor  ICMJE rEVO Biologics
Collaborators  ICMJE Not Provided
Investigators  ICMJE
Principal Investigator: Robert C Tait, MD Glasgow Royal Infirmary
PRS Account rEVO Biologics
Verification Date August 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP