Gene therapy can correct forms of severe combined immunodeficiency

Severe combined immunodeficiency is defect in the immune system that results in a loss of the adaptive immune cells known as B cells and T cells. Mutations in several different genes can lead to the development of severe combined immunodeficiency, including mutation of the adenosine deaminase (ADA) gene.

Traditional treatment options, such as , are of limited efficacy, but from a compatible donor leads to a better response. A recent clinical trial indicated that gene therapy to insert the correct ADA gene in the patient's own can also lead to a good response.

However, patients were noted to have defects in B cell tolerance, meaning that some that react to antigens from the body fail to be eliminated, leading to an autoimmune response. Dr. Eric Meffre and colleages at Yale University in New Haven, Connecticut and Alessandro Aiuti in Milan, Italy joined together to better understand why patients developed B cell tolerance problems. They found that loss of the ADA gene directly contributes to B cell tolerance problems and that these defects are mostly corrected after gene therapy.

Their results point to a previously unknown role for ADA in B cell response and support the use of gene therapy as an effective treatment option for ADA-deficient severe combined immunodeficiency patients.

More information: Defective B cell tolerance in adenosine deaminase deficiency is corrected by gene therapy, Journal of Clinical Investigation.

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Research reveals how lymph nodes expand during disease

12 hours ago

Cancer Research UK and UCL scientists have discovered that the same specialised immune cells that patrol the body and spot infections also trigger the expansion of immune organs called lymph nodes, according to a study published ...

Protecting us from our cells

16 hours ago

Our immune system defends us from harmful bacteria and viruses, but, if left unchecked, the cells that destroy those invaders can turn on the body itself, causing auto-immune diseases like type-1 diabetes ...

User comments