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Genetic Susceptibility to Factor VIII Inhibitors

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: NCT00344435
Recruitment Status : Completed
First Posted : June 26, 2006
Last Update Posted : April 5, 2018
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) )

Brief Summary:

This international study will identify genetic factors that may influence the development of inhibitory antibodies in patients with hemophilia A after treatment with factor VIII. Bleeding episodes in patients with inhibitors are often more difficult to treat. Previous research indicates that genetic factors play a role in the development of inhibitors. A better understanding of the influence of genes in this treatment complication may be helpful in predicting, treating or preventing inhibitors.

People in families in which one or more members have severe factor VIII deficiency and one or more have a history of an inhibitor may be eligible for this study. Participants fill out a form with questions about the person's relationship to other family members taking part in the study. Those with hemophilia provide a brief medical history, including hemophilia-related information, inhibitor history and the presence of other conditions such as hepatitis C and HIV. All participants have a blood sample taken for laboratory and research tests.

Condition or disease

Detailed Description:
In collaboration with investigators of the Hemophilia Inhibitor Genetic Study (HIGS) multicenter study and the University of Lund, University Hospital, Malmo, Sweden, we propose to assess the role of genetic variants in the process of developing inhibitors to Factor VIII in persons with hemophilia. The discovery of genetic associations offers the potential to direct clinical management in order to prevent inhibitor development and improve clinical care in patients with inhibitors.

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Study Type : Observational
Actual Enrollment : 1187 participants
Observational Model: Family-Based
Time Perspective: Cross-Sectional
Official Title: Factor VIII Inhibitor Formation: Identifying Predisposing Genetic Factors
Study Start Date : May 24, 2005
Study Completion Date : April 5, 2016

Primary Outcome Measures :
  1. Collection from 3500 donors [ Time Frame: Every six months ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   1 Year to 100 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

DNA and relevant clinical data from properly consented hemophiliac subjects and family members (maximum estimated = 3500) will be provided to the LGD for genotyping and analysis.


No available subjects will be excluded to maximize power.

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 identifier (NCT number): NCT00344435

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University Hospital, University of Lund
Malmo, Sweden
Sponsors and Collaborators
National Cancer Institute (NCI)
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Principal Investigator: Janelle Cortner, Ph.D. National Cancer Institute (NCI)

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Responsible Party: National Cancer Institute (NCI) Identifier: NCT00344435     History of Changes
Other Study ID Numbers: 999905160
First Posted: June 26, 2006    Key Record Dates
Last Update Posted: April 5, 2018
Last Verified: April 5, 2016
Keywords provided by National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) ):
Additional relevant MeSH terms:
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Hemophilia A
Blood Coagulation Disorders, Inherited
Blood Coagulation Disorders
Hematologic Diseases
Coagulation Protein Disorders
Hemorrhagic Disorders
Genetic Diseases, Inborn
Factor VIII