Genetic Susceptibility to Factor VIII Inhibitors

This study has been completed.
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) ) Identifier:
First received: June 23, 2006
Last updated: May 8, 2015
Last verified: April 2015

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.


Study Type: Observational
Study Design: Time Perspective: Cross-Sectional
Official Title: Factor VIII Inhibitor Formation: Identifying Predisposing Genetic Factors

Resource links provided by NLM:

Further study details as provided by National Institutes of Health Clinical Center (CC):

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

Estimated Enrollment: 3500
Study Start Date: May 2005
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.

Ages Eligible for Study:   1 Year and older
Genders Eligible for Study:   Both
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.

  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00344435

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

Responsible Party: National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) ) Identifier: NCT00344435     History of Changes
Other Study ID Numbers: 999905160, 05-C-N160
Study First Received: June 23, 2006
Last Updated: May 8, 2015
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):

Additional relevant MeSH terms:
Factor VIII
Hematologic Agents
Pharmacologic Actions
Therapeutic Uses processed this record on November 30, 2015