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Study of First TIME Immunotolerance Induction in Severe Hemophilia A Patients With Inhibitor at High Risk of Failure: Comparison With FVIII Concentrates With or Without Von Willebrand Factor - RES.I.S.T. Naive (RESIST NAIVE)

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ClinicalTrials.gov Identifier: NCT01051544
Recruitment Status : Active, not recruiting
First Posted : January 18, 2010
Last Update Posted : April 11, 2017
Information provided by (Responsible Party):

Study Description
Brief Summary:
This is a prospective, controlled, randomized, open label study, aimed at comparing FVIII/VWF concentrates with FVIII concentrates at 200 IU/kg daily in their ability to induce immune tolerance in Haemophilia A patients with high responding inhibitors and poor prognosis for success.

Condition or disease Intervention/treatment
Severe Hemophilia A Drug: FVIII Concentrates Drug: FVIII/VWF concentrates

Detailed Description:

The presence of Factor VIII (FVIII) inhibitor prevents FVIII infusions from working properly and makes treatment of bleeding episodes very difficult. Having an inhibitor is a serious and life-threatening complication in patients with Hemophilia. The usual treatment of patients with FVIII inhibitors involves "immune tolerance induction" (ITI). Immune Tolerance means that the body can accept infused FVIII and that FVIII is again effective in controlling bleeds. ITI involves giving high doses of FVIII regularly until the inhibitor disappears. This treatment is not always effective. The inhibitor persists in about 1 in 5 patients who undergo ITI.

There are 2 types of FVIII concentrates: FVIII concentrates derived from human plasma, which contain the von Willebrand factor, and concentrates of FVIII without VWF (recombinant or plasma derived). Both types of concentrates are commonly used to induce immune tolerance in patients with Hemophilia A. Retrospective studies in subjects with hemophilia and inhibitors at risk for failing ITI, have indicated a higher rate of success if patients were treated with von Willebrand containing factor VIII concentrates. It is not known whether the addition of Von Willebrand factor offers an advantage to achieving immune tolerance.

Study Design

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 148 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Randomised Study of First TIME Immunotolerance Induction in Patients With Severe Type A Haemophilia With Inhibitor at High Risk of Failure: Comparison of Induction of Immune Tolerance With FVIII Concentrates With or Without Von Willebrand Factor Acronym: RES.I.S.T.- Naive
Actual Study Start Date : September 25, 2009
Estimated Primary Completion Date : June 2020
Estimated Study Completion Date : June 2020

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Hemophilia
U.S. FDA Resources

Arms and Interventions

Arm Intervention/treatment
Active Comparator: von Willebrand factor-free FVIII concentrates
Patients treated with FVIII concentrates
Drug: FVIII Concentrates
Patients will be centrally randomized to receive a von Willebrand factor-free FVIII concentrate (recombinant or plasma-derived, monoclonally-purified). The choice of product brand will be based on physician / patients preferences.
Other Names:
  • Including but not limited to:
  • Advate
  • Beriate P
  • Hemofil M
  • Helixate
  • Kogenate
  • Kogenate SF
  • Monarch M
  • Monoclate
  • Recombinate
  • Refacto
  • Replenate
  • Xyntha
Active Comparator: FVIII/VWF concentrates
Patients treated with FVIII/VWF concentrates
Drug: FVIII/VWF concentrates
Patients will be centrally randomized to receive a FVIII/VWF concentrate of 200 IU/Kg by one or two bolus injections daily.The choice of product brand will be based on physician / patients preferences.
Other Names:
  • Including but not limited to:
  • Koate-DVI
  • 8Y
  • Optivate
  • Alphanate
  • Fahndi
  • Haemate P
  • Humate P
  • Haemoctine SDH
  • Octanate
  • Wilate
  • Emoclot DI
  • Factane

Outcome Measures

Primary Outcome Measures :
  1. Primary end point is the success in inducing immune tolerance, defined as: the abolition of the inhibitor to < 0.6 BU within 33 months of ITI with a factor VIII recovery ≥ 66% and half-life ≥ 6 hrs, and measured after a 72-hour washout period. [ Time Frame: 33 months ]

Secondary Outcome Measures :
  1. Absence of relapse, up to 12 months after achievement of Immune Tolerance [ Time Frame: 12 months ]
  2. Time to achieve partial or complete success as defined in the protocol. [ Time Frame: 33 months ]
  3. Safety Compliance to treatment [ Time Frame: 33 months ]
  4. Cost of Care [ Time Frame: 12 months ]

Eligibility Criteria

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. severe hemophilia A (FVIII<1%);
  2. male, any age;
  3. high responders (peak inhibitor levels > 5 BU);
  4. any inhibitor level at study enrolment;
  5. ability and willingness to participate in the study;
  6. at least one of the following risk factors for ITI failure:

    • peak inhibitor titer > 200 BU
    • titer at ITI start > 10 BU
    • age > 7 years
    • time between inhibitor occurrence and ITI > 2 years
  7. absence of high risk of cardiovascular, cerebrovascular or other thromboembolic events as deemed by the treating clinician.

Exclusion Criteria:

  1. concomitant systemic treatment with immunosuppressive drugs;
  2. concomitant experimental treatment;
  3. previous ITI attempt;
  4. previous history of myocardial infarction and/or cerebral stroke.
Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01051544

United States, California
City of Hope Medical Center
Duarte, California, United States, 91010
Sponsors and Collaborators
City of Hope Medical Center
Charta Fondazione
Grifols Biologicals Inc.
CSL Behring
Biotest Pharmaceuticals Corporation
Grifols Therapeutics Inc.
Principal Investigator: Nadia P Ewing, MD Clinical Professor of Pediatrics, City of Hope National Medical Center, Dept. of Pediatrics, 1500 E. Duarte Rd. Duarte, CA 91010
More Information

Additional Information:
Responsible Party: City of Hope Medical Center
ClinicalTrials.gov Identifier: NCT01051544     History of Changes
Other Study ID Numbers: 06201
2008-007016-15 ( EudraCT Number )
First Posted: January 18, 2010    Key Record Dates
Last Update Posted: April 11, 2017
Last Verified: April 2017

Keywords provided by City of Hope Medical Center:
VWF/FVIII Concentrates

Additional relevant MeSH terms:
Hemophilia A
Blood Coagulation Disorders, Inherited
Blood Coagulation Disorders
Hematologic Diseases
Coagulation Protein Disorders
Hemorrhagic Disorders
Genetic Diseases, Inborn
Factor VIII