Thalassemia Awareness Program by OSF

Delta Thalassemia is the Reason of Hemoglobins Abnormality

Delta-Thalassemia

As well as alpha and beta chains present in hemoglobin, about 3% of adult hemoglobin is made of alpha and delta chains. Just as with beta Thalassemia, mutations that affect the ability of this gene to produce delta chains can occur.

Alpha Thalassemia - Severe Genetical Blood Disorder

Alpha-Thalassemia

The α-Thalassemia involves the genes HBA1 and HBA2, inherited in a Mendelian recessive fashion. Two gene loci and so four alleles exist. It is also connected to the deletion of the 16p chromosome. α Thalassemia result in decreased alpha-globin pro

duction, therefore fewer alpha-globin chains are produced, resulting in an excess of β chains in adults and excess γ chains in newborns. The excess β chains form unstable tetramers (called hemoglobin H or HbH of 4 beta chains), which have abnormal oxygen dissociation curves.

Thalassemia: Signs and symptoms

Abnormality Seems Clear in Thalassemics

Iron overload: People with Thalassemia can get an overload of iron in their bodies, either from the disease itself or from frequent blood transfusions. Too much iron can result in damage to the heart, liver, and endocrine system, which includes glands that produce hormones that regulate processes throughout the body. The damage is characterized by excessive deposits of iron. Without adequate iron chelation therapy, almost all patients with beta-Thalassemia accumulate potentially fatal iron levels.

Infection: People with Thalassemia have an increased risk of infection. This is especially true if the spleen has been removed.

Bone deformities: Thalassemia can make the bone marrow expand, which causes bones to widen. This can result in abnormal bone structure, especially in the face and skull. Bone marrow expansion also makes bones thin and brittle, increasing the risk of broken bones.

Enlarged spleen: The spleen aids in fighting infection and filters unwanted material, such as old or damaged blood cells. Thalassemia is often accompanied by the destruction of a large number of red blood cells and the task of removing these cells causes the spleen to enlarge. Splenomegaly can make anemia worse, and it can reduce the life of transfused red blood cells. Severe enlargement of the spleen may necessitate its removal.

Slowed growth rates: Anemia can cause a child's growth to slow. Puberty also may be delayed in children with Thalassemia.

Heart problems: Diseases, such as congestive heart failure and abnormal heart rhythms, may be associated with severe Thalassemia.