Beta thalassemias are a group of inherited blood disorders. They are forms of thalassemia .. to remove the excess iron. Transmission is autosomal recessive; however, dominant mutations and compound heterozygotes have been reported. Thalassemias are inherited blood disorders characterized by abnormal hemoglobin production. The severity of alpha and beta thalassemia depends on how many of the four genes for alpha globin or two genes for beta globin are missing. Beta thalassemia syndromes are a group of hereditary disorders characterized by a genetic deficiency in the synthesis of beta-globin chains. In the homozygous .

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Retrospective, prospective, and randomized clinical studies have shown that combined iron thalassemmie with desferrioxamine and deferiprone rapidly reduces myocardial siderosis, improves cardiac and endocrine function, reduces liver iron and serum ferritin concentration, reduces cardiac mortality, and improves survival; toxicity is manageable [ Tanner et alBet et al ].

Some atypical beta-thalassemia heterozygotes have either normal red cell indices or normal Heterzygote level, or both, with a completely silent hematologic phenotype. Genetic variation on chromosome 6 influences F cell levels in healthy individuals of African descent and HbF levels in sickle cell patients. Popular chelators include deferoxamine and deferiprone.

OMIM is intended for use primarily by physicians and other professionals concerned with genetic disorders, by genetics researchers, and by advanced students in science and medicine.

Nemeth E, Ganz T. Molecular genetic testing if the pathogenic variants in the family are known. The HSCs then have a beta-globin gene added using a lentiviral vector.

Liver ultrasound evaluation and determination of serum alpha-fetoprotein concentration in adults with hepatitis C and iron overload for early detection of hepatocarcinoma. Global epidemiology of haemoglobin disorders and derived service indicators.


A new TATA box mutation detected at prenatal diagnosis for beta-thalassemia. The molecular and clinical tualassemie of the beta-thalassemias were reviewed by Olivieri The diagnosis can be confirmed by demonstrating thalassemia trait in both parents, by globin biosynthetic ratios, or by beta gene screening.

The most promising results in the mouse model have been obtained with lentiviral vectors [ Persons ].


The presence of hyper-unstable hemoglobin should be suspected in any individual with thalassemia intermedia when both parents are hematologically normal or in families with a pattern of autosomal dominant transmission of the thalassemia intermedia phenotype. For example, women with thalassemia intermedia who had never previously received a blood transfusion or who had received a minimal quantity of blood are reported to be at risk for severe alloimmune anemia if blood transfusions are required during pregnancy [ Origa et al ].

Archived from the original on 20 November Overview on practices in thalassemia intermedia management aiming for lowering complication rates across a region of endemicity: Randomized controlled trial of deferiprone or deferoxamine in beta-thalassemia major patients with asymptomatic myocardial siderosis. Bone mineral density BMD was low especially at the lumbar spine.

We are determined to keep this website freely accessible. In most states, these children will be discovered by state screening or occasionally by the obstetrician who makes a diagnosis of thalassemia trait in the mother and obtains a family history of thalassemia or anemia in both parents prior to the birth of the baby. For clinical purposes, beta-thalassemia is divided into thalassemia major transfusion dependentthalassemia intermedia of intermediate severityand thalassemia minor asymptomatic, carrier state.

What is Thalassemia?

Bone marrow transplantation is the only cure and is indicated for patients with severe thalassemia major. J Cardiovasc Magn Reson. Treatment-related adverse events were typical of those associated with autologous stem-cell transplantation. For individuals with thalassemia major, follow up to monitor the effectiveness of transfusion therapy and chelation therapy and their side effects includes the following: Bone marrow transplants can be curative for some children.


Determination of liver iron concentration in a liver biopsy specimen shows a high correlation with total body iron accumulation and is the gold standard for evaluation of liver iron overload.

Cord blood stem cell transplantation for haemoglobinopathies. Evaluation of Relatives at Risk It is appropriate to evaluate apparently asymptomatic older and younger sibs of an affected individual as early as possible. As with about half of all hereditary diseases, [18] an inherited mutation damages the assembly of the messenger-type RNA mRNA that is transcribed from a chromosome.

The effect of these loci on the transfusion-free survival probability and on the age at which the patient started regular transfusions was demonstrated [ Danjou et al ]. The transplantation was considered successful.

Thakassemie novel mutations in the erythroid transcription factor KLF1 gene associated with increased fetal hemoglobin levels in adults. Archived from the original on 20 September Mosby Elsevier, Rapid Review Series. Beta 0 thalassemia trait in Sardinia. Peripheral blood smear shows, in addition to microcytosis and hypochromia, anisocytosis, poikilocytosis spiculated tear drop and elongated cellsand nucleated red blood cells i.

Individuals with thalassemia intermedia do not require regular treatment with blood transfusion. Complete cardiac evaluation, and evaluation of thyroid, endocrine pancreas, parathyroid, adrenal, and pituitary function.