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β thalassemia major (Mediterranean anemia or Cooley anemia) is caused by a β o /β o genotype. No functional β chains are produced, and thus no hemoglobin A can be assembled. This is the most severe form of β-thalassemia; β thalassemia intermedia is caused by a β + /β o or β + /β + genotype. In this form, some hemoglobin A is produced;
Alpha-thalassemia (α-thalassemia, α-thalassaemia) is a form of thalassemia involving the genes HBA1 [5] and HBA2. [6] Thalassemias are a group of inherited blood conditions which result in the impaired production of hemoglobin , the molecule that carries oxygen in the blood. [ 7 ]
Beta thalassemias (β thalassemias) are a group of inherited blood disorders. They are forms of thalassemia caused by reduced or absent synthesis of the beta chains of hemoglobin that result in variable outcomes ranging from severe anemia to clinically asymptomatic individuals. Global annual incidence is estimated at one in 100,000. [4]
Thalassemia patients may also be faced with potential oxidative damage to brain cells as the brain has high oxygen demands, but contains relatively low levels of antioxidant agents for protection against oxidation. The presence of excess iron in the brain may lead to higher concentrations of free radicals.
Sickle cell beta thalassemia. Other names. Sickle cell-β thalassemia. Specialty. Hematology. Sickle cell-beta thalassemia is an inherited blood disorder. The disease may range in severity from being relatively benign and like sickle cell trait to being similar to sickle cell disease. [1][2]
Hemoglobin H disease is a genetic disorder resulting in absent or impaired production of the α-globin protein, a normal component of the hemoglobin. The disease occurs when the α-globin gene expression is reduced to less than 30% of the normal expression. [2] In a healthy individual there are four copies of the gene which encode the alpha ...
Alpha-thalassemia mental retardation syndrome (ATRX), also called alpha-thalassemia X-linked intellectual disability syndrome, nondeletion type or ATR-X syndrome, [1] is an X-linked recessive condition associated with a mutation in the ATRX gene. [2] Males with this condition tend to be moderately intellectually disabled and have physical ...
Alpha-thalassemia: D56.0: 448, 33334, 33678: Alpha-thalassemia (α-thalassemia) is a form of thalassemia involving the genes HBA1 [20] and HBA2. [21] It is condition that causes a reduction of hemoglobin production. There are two types of Alpha-thalassemia, named hemoglobin Bart hydrops fetalis syndrome (also known as Hb Bart syndrome) and HbH ...