A Study of Factor Inhibitors in Adult Patients With Hemophilia and Von Willebrand's Disease in Upper Egypt

2019-10-02 07:21:35 | BioPortfolio


Hemophilia A and B are bleeding disorders caused by deficiency of factor VIII and IX, respectively. The deficiency of one of these coagulation factors is due to a mutation on the X chromosome. Accordingly replacement of the deficient factor is currently the main treatment for these disorders. The most disappointing complication of replacement therapy in hemophilia is the development of inhibitors. Unlike haemophilia , inhibitor development in patients with V Willebrand's Disease (VWD) is a rare complication of treatment. Studies on inhibitors whether on hemophilia or VWD are limited in our region.

This study aims to

1. To estimate the prevalence of factor inhibitors in hemophilia and VWD patients in our region.

2. To investigate modifiable risk factors associated with development of inhibitors in both diseases.

3. To correlate the level of inhibitor with the clinical presentation of the patients.

4. To assess influence of factor inhibitors on quality of life in patients who developed factor inhibitors in both diseases.


Individuals with hemophilia are deficient in one of the clotting factor proteins that are vital in the formation of a clot. Classic hemophilia or hemophilia A is a deficiency of factor VIII, while Christmas Disease or Hemophilia B is a deficiency of factor IX. The prevalence of hemophilia A or B varies in different countries and geographic regions.

Patients with either type of hemophilia are at risk for prolonged bleeding, replacement of the deficient protein is the main therapy . The most serious complication of replacement therapy in hemophilia is the development of inhibitors.An inhibitor is a polyclonal high‑affinity immunoglobulin G (IgG) that is directed against the clotting factorI protein. These antibodies can be either inhibitory or non inhibitory.

Inhibitors neutralize the administered clotting factor so that bleeding does not stop. Inhibitors are the most significant risk factor for morbidity and mortality associated with hemophilia, and patients with inhibitors present complex patient management challenges.

Few studies investigated development of factor inhibitor in Egyptian patients, however most of them concentrated on pediatric patients, also data regarding factor inhibitors in Upper Egypt was limited.

VonWillebrand's disease is a bleeding disorder caused by deficiency of VWF. The treatment of VWD is somewhat similar to that of patients with hemophilia which consists of infusions to replace the missing factors as on demand regimen using plasma derived (PD) products which contains both FVIII and VWF. Furthermore, many of the patients are currently on some form of prophylaxis to eliminate or decrease the frequency of bleeding episodes.

Nearly, 7.5 % of VWD patients develop inhibitors to VWF becoming non- responsive to replacement therapy, and prone to develop severe anaphylactic and life threatening reactions when exposed to any product that contains VWF.

Unlike hemophilia clinical presentation of VWD patients who developed inhibitors is not serious.

Again data on factor inhibitors in VWD is deficient in many countries worldwide particularly Egypt . Investigators assumed that this is the first study that well assess factor inhibitors in VWD in Upper Egypt.

Study Design




Not yet recruiting


Assiut University

Results (where available)

View Results


Published on BioPortfolio: 2019-10-02T07:21:35-0400

Clinical Trials [258 Associated Clinical Trials listed on BioPortfolio]

ATHN 7: Hemophilia Natural History Study

This is a real-world study of the safety of the treatments used for people with hemophilia. The study will follow people with hemophilia A or B from across the country for about 4 years as...

Study Evaluating ReFacto in Hemophilia A

To identify the causative mutations in previously untreated patients with hemophilia A enrolled in the ReFacto® clinical safety and efficacy study CTN 93-R833-0XX/C9741-28, using two esta...

Females With Severe or Moderate Hemophilia A or B: A Multi-Center Study

To collect and analyze data on females with hemophilia so as to better define the difference between the study population and the male population with hemophilia.

Covalent Tolerance Induction to Factor VIII-Prediction of Inhibitors in Hemophilia

To correlate the HLA type and genetic defect with hemophilia A.

Epidemiology and Immunology of Hemophilia A Inhibitors

To determine the risk factors associated with inhibitor formation in hemophilia A and to study the mechanism of tolerance in the murine hemophilia A model.

PubMed Articles [113 Associated PubMed Articles listed on BioPortfolio]

Neuropsychological function in children with hemophilia: A review of the Hemophilia Growth and Development Study and introduction of the current eTHINK study.

Almost all of what is known about neurologic and cognitive development in hemophilia derives from the Hemophilia Growth and Development Study, conducted during an era when treatment regimens and comor...

Apparent synonymous mutation F9 c.87A>G causes secretion failure by in-frame mutation with aberrant splicing.

Hemophilia B is an X-linked recessive bleeding disorder caused by coagulation factor IX (FIX) gene (F9) mutations. Several F9 synonymous mutations have been known to cause hemophilia B; however, the d...

Detection of hemophilia by fluorescence spectroscopy: A photodiagnosis approach.

Hemophilia (HP), the deficiency of clotting factors such as VIII (FVIII) and IX, is an inherited blood disorder which is due to the lack of clotting protein. Conventional techniques for detecting hemo...

Concurrent lymphoma and hemophilia B in a pediatric patient: A case report.

Lymphoma is the third most common cancer among children in the United States and Europe. Hemophilia is a congenital bleeding disorder characterized by deficiency of coagulation factor VIII or IX. Hemo...

Epidemiological Profile of Hemophilia in Baghdad-Iraq.

Hemophilia is an inherited bleeding disorder that mainly affects males. Globally, there are about 400 000 people with hemophilia and only 25% of them receive adequate treatment. There is insufficien...

Medical and Biotech [MESH] Definitions

A deficiency of blood coagulation factor IX inherited as an X-linked disorder. (Also known as Christmas Disease, after the first patient studied in detail, not the holy day.) Historical and clinical features resemble those in classic hemophilia (HEMOPHILIA A), but patients present with fewer symptoms. Severity of bleeding is usually similar in members of a single family. Many patients are asymptomatic until the hemostatic system is stressed by surgery or trauma. Treatment is similar to that for hemophilia A. (From Cecil Textbook of Medicine, 19th ed, p1008)

The classic hemophilia resulting from a deficiency of factor VIII. It is an inherited disorder of blood coagulation characterized by a permanent tendency to hemorrhage.

A hereditary deficiency of blood coagulation factor XI (also known as plasma thromboplastin antecedent or PTA or antihemophilic factor C) resulting in a systemic blood-clotting defect called hemophilia C or Rosenthal's syndrome, that may resemble classical hemophilia.

Bleeding into the joints. It may arise from trauma or spontaneously in patients with hemophilia.

Stable blood coagulation factor involved in the intrinsic pathway. The activated form XIa activates factor IX to IXa. Deficiency of factor XI is often called hemophilia C.

More From BioPortfolio on "A Study of Factor Inhibitors in Adult Patients With Hemophilia and Von Willebrand's Disease in Upper Egypt"

Quick Search

Relevant Topic

Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...

Searches Linking to this Trial