Cooperative Study of Factor VIII Inhibitors

Hemophilia A Clinical Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00000582
• Other study ID #: 302
• Status: Completed
• Phase: Phase 3
• First received: October 27, 1999
• Last updated: April 26, 2012
• Start date: July 1978
• Est. completion date: July 1979

Study information

• Verified date: April 2012
• Source: National Heart, Lung, and Blood Institute (NHLBI)
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Federal Government
• Study type: Interventional

Clinical Trial Summary

To test the efficacy of prothrombin complex concentrates (Factor IX) in the treatment of hemophiliac patients who had inhibitors to Factor VIII.

Description:

BACKGROUND:

Despite major advances in the treatment of patients with hemophilia, a serious remaining challenge was presented by the occurrence of circulating inhibitors to Factor VIII. Because of lack of information on the natural course of patients with Factor VIII inhibitors, the relative efficacy of various modes of therapy was not established. The Division of Blood Diseases and Resources decided to sponsor a clinical investigation which would evaluate populations of hemophilia patients for Factor VIII inhibitors, follow up these patients to provide information on the natural history of the inhibitor in the hemophilia patients, and make available a reference center to monitor results and attain uniformity.

Treatment of a patient with a severe inhibitor and consequent bleeding remained a problem. Management included protracted treatment with Factor VIII, use of immunosuppressive agents and prothrombin complex (or Factor IX) concentrates. The rationale for Factor IX was that it bypassed the defect in Factor VIII caused by the inhibitor. This method of therapy attracted wide popularity, but the success was greatly debated. It was intended at the very outset of the Factor VIII study that therapeutic trials involving patients with inhibitors would not be a prime function, but that such studies would be monitored if necessary. A controlled trial of Factor IX concentrates therapy was strongly advised by the DBDR Advisory Committee. Accordingly, during fiscal year 1978, a protocol for a double-blind control study was developed by the Factor VIII inhibitor group. The trial began in the spring of 1978, and the intervention terminated about one year later.

DESIGN NARRATIVE:

Double-blind study; patients served as their own controls. A total of 51 patients each received a single large dose of Konyne, Proplex, or diluted albumin (as a control). Joint bleeding of the elbow, knee, and ankle was evaluated six hours after each dose.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 0
• Est. completion date: July 1979
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 18 Years to 75 Years
• Eligibility: Males with hemophilia, not stratified as to ethnic group.

Study Design

Masking: Double-Blind, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Blood Coagulation Disorders
• Disease
• Hematologic Diseases
• Hemophilia A
• Hemorrhagic Disorders
• Hemostatic Disorders

Intervention

Drug:
• factor ix

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
National Heart, Lung, and Blood Institute (NHLBI)

References & Publications (5)

Eyster ME, Gill FM, Blatt PM, Hilgartner MW, Ballard JO, Kinney TR. Central nervous system bleeding in hemophiliacs. Blood. 1978 Jun;51(6):1179-88. — View Citation

Gerety RJ, Eyster ME, Tabor E, Drucker JA, Lusch CJ, Prager D, Rice SA, Bowman HS. Hepatitis B virus, hepatitis A virus and persistently elevated aminotransferases in hemophiliacs. J Med Virol. 1980;6(2):111-8. — View Citation

Kasper CK. Effect of prothrombin complex concentrates on factor VIII inhibitor levels. Blood. 1979 Dec;54(6):1358-68. — View Citation

Lusher JM, McMillan CW. Severe factor VIII and factor IX deficiency in females. Am J Med. 1978 Oct;65(4):637-48. — View Citation

Lusher JM, Shapiro SS, Palascak JE, Rao AV, Levine PH, Blatt PM. Efficacy of prothrombin-complex concentrates in hemophiliacs with antibodies to factor VIII: a multicenter therapeutic trial. N Engl J Med. 1980 Aug 21;303(8):421-5. — View Citation