Hemophilia Research Papers

Hemophilia A is an X-linked disorder caused by a deficient or defective clotting factor VIII (FVIII) protein, and characterized by spontaneous or traumatic bleeding into joints and muscles [Ragni]. It causes afflicted individuals to not be able to coagulate their blood very efficiently or at all when getting an injury in which blood is exposed either internally or externally. This disease can be very dangerous and fatal because major blood loss can occur if the patient has not received treatment.

According to the National Hemophilia Foundation (n.d.), von Willebrand disease (VWD) is a genetic disorder caused by missing or defective von Willebrand factor (VWF), a clotting protein. VWF binds factor VIII, a key clotting protein, and platelets in blood vessel walls, which help form a platelet plug during the clotting process. The condition is named after Finnish physician Erik von Willebrand, who first described it in the 1920s (National Hemophilia Foundation, n.d.). The seriousness of the bleeding varied between family

Hemophilia A is a known X-linked recessive disorder. This condition or bleeding disorder is characterized by a deficiency in the activity of a coagulation factor, which in this case is F8 or coagulation factor VIII. This condition is clinically known to be heterogeneous and its severity depends on the plasma level of the coagulation factor VIII. Varying levels of hemophilia exist which are categorized based on percentage of coagulation factor within blood plasma compared to normal levels.

Hemophilia is an X-linked recessive disease in which blood lacks blood-clotting proteins. Females have two X chromosomes, indicating that they are generally carriers and transmit the gene to their sons. People with mild hemophilia bleed after surgery, injury, or trauma. Severe hemophilia produces spontaneous internal bleeding in joints and muscles. Fortunately, medicines and lifestyle changes offers hemophiliacs fairly normal lives. Through learning about hemophilia, I became interested in genetic diseases and finding a cure for those

3. What is it about the inheritance pattern of factor viii deficiency seen in Greg and Olga’s pedigree that point toward it not being an autosomal recessive trait?

The genetic disorder of Hemophilia is where the clotting factors of the blood are absent or deficient, causing it to be a dangerous disorder to the people who have it. This disorder is where the people who have it will bleed easily and accessibly. Different types of hemophilia are classified by different deficient clotting factors in the blood. Treatments for hemophilia are available, including transfusions of frozen

The normal mother has two X chromosomes, one of which carries the gene for the abnormal condition; but if her son inherits her X chromosome with the abnormal gene, he will be affected with the condition. HEMOPHILIA is inherited in this matter. Multifactorial Defects Many common birth defects do not occur in a pattern that indicates simple Mendelian inheritance. They seem to result from an interaction of genes and the environment, including the intrauterine environment, and each factor includes a number of different hereditary and environmental influences; hence, these defects are called multifactorial.

Hemophilia A is classified as a hereditary blood disorder (NCBI, 2011), and is caused by a lack of blood clotting protein, known as factor VIII (NCBI, 2011). The specific gene that codes for factor VIII is known as the HEMA gene (NCBI, 2011). Factor VIII is mainly synthesized in the liver (NCBI, 2011). Any lack of factor VIII

Hemophilia, once called the royal disease is a problem with the clotting of blood. When a cut or bruise occurs it can bleed causing problems with people who suffer from hemophilia. Patients with hemophilia will continually bleed longer than a normal individual. This bleeding can lead to harmful levels of blood loss to internal bleeding. Hemophilia is very rare occurring once every five thousand people. Rare, however it is the most common x linked trait. When an injury occurs, blood cells called platelets plug the wound. Then fibrins seal it up. Hemophilia splits into two groups hemophilia A and hemophilia B. People who have hemophilia A have low levels of blood clotting factor 8. Hemophilia B patients have low levels of blood clotting factor

Hemophilia is the oldest known hereditary bleeding disorder. There are two types of hemophilia, A and B (Christmas Disease). Low levels or complete absence of a blood protein essential for clotting causes both. Patients with hemophilia A lack the blood clotting protein, factor VIII, and those with hemophilia B lack factor IX. A person with severe hemophilia has less than 1% of the normal amount of a clotting factor - either Factor VIII (8) or Factor IX (9). People without hemophilia have between 50-150% of the normal level of factor VIII or IX. There are about 20,000 hemophilia patients in the United States. Each year, about 400 babies are born with this disorder. Approximately 85% have hemophilia A and the remainder has hemophilia B.

Mutations in this factor lead to Hemophilia B2. Two vectors—AAV-CMV-F.IX and AAV-EIFα-F.IX—were inserted into the muscle, each having a similar role2. Both vectors were responsible for inducing the activity of the coagulation factor IXa, which is absent in patients exhibiting Hemophilia B, and plays a crucial role in blood clotting2. The results of this study showed that while the two vectors played similar roles, there were important distinctions between the two that determined the AAV-CMV-F.IX vector was more useful for XI factor deficiency2. A potential downfall of using AAV was the issue of tumors being caused in animals due to the vectors2. More studies will have to be completed to address this issue

Hemophilia has 2 types: Hemophilia A, and Hemophilia B. Hemophilia A is also known as “Factor VIII Deficiency” and Hemophilia B is also known as “Factor IX Deficiency”. Hemophilia A is more common than Hemophilia B. Hemophilia A means that the body does not have enough clotting for Factor VIII.

Factor V Leiden is the most common inherited form of thrombophilia (Stammers, Dorion, Trowbridge, Yen, Klayman, Murdock & Gilbert, 2005). Between 3 and 8 percent of people with European ancestry carry one copy of the factor V Leiden mutation in each cell, and about 1 in 5,000 people have two copies of the mutation (Stammers, Dorion, Trowbridge, Yen, Klayman, Murdock & Gilbert, 2005). People who inherit two copies of the mutation, one from each parent, have a higher risk of developing a clot than people who inherit one copy of the mutation. Considering that about 1 in 1,000 people per year in the general population will develop an abnormal blood clot, the presence of one copy of the factor V Leiden mutation increases that risk to 3 to 8 in 1,000, and having two copies of the mutation may raise the risk to as high as 80 in 1,000 (Stammers, Dorion, Trowbridge, Yen, Klayman, Murdock & Gilbert, 2005). Although, only about 10 percent of individuals with the factor V Leiden mutation ever develop

Hemophilia is a problem with the blood in a person that causes them to bleed not any faster than normal, but they often bleed for a longer period. Their blood is missing the clotting factor (a protein in the bloodstream that works to control bleeding). Hemophilia is quite rare; roughly 1 in every 10,000 persons are born with it. Rarely, hemophilia can be an acquired disease which just means a person is not born with it, but will develop it during their lifetime. This rarity occurs when a person's immune system forms antibodies that attack the clotting factor in the blood. The entire antibody population fights against the blood to prevent the clotting factors from working properly.

There are three types of hemophilia (hemophilia A, hemophilia B, hemophilia C). Hemophilia A is more common and it is caused by a deficiency of factor VIII (Carson-DeWitt, 2014). This deficiency can vary in severity. This is why each case of Hemophilia varies in each case. Most people have severe Hemophilia which means that the factor is functioning at a hundredth of what it should be.