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Some clinicians and researchers hope that individuals with inherited diseases (such as cystic fibrosis and recessive Stargardt disease, which causes progressive loss of sight) might one day be cured by providing them with a corrected version of their disease-causing faulty gene, i.e., by gene therapy.
In gene therapy, the curative gene is packaged in an agent known as a vector, which carries the gene into cells where it is required. One of the most common vectors is derived from a virus, adeno-associated virus (AAV).
However, for some diseases, such as recessive Stargardt disease, one barrier to successful gene therapy is that AAV is not able to accommodate the large size of the curative gene. New data, generated by Alberto Auricchio and colleagues, at the Telethon Institute of Genetics and Medicine, Italy, has revealed that vectors derived from a specific form of AAV known as AAV5 can accommodate large genes, including that missing in a mouse model of recessive Stargardt disease.
In the study, it was found that much larger genes could be packaged into vectors derived from AAV5 than from vectors derived from other forms of AAV. Further, it was shown that AAV5 could be used to induce cells to successfully convert the information in the large genes into protein. When AAV5 containing the mouse gene Abca4, which is the mouse correlate of the gene mutated in individuals with recessive Stargardt disease, was injected into the eye of mice lacking Abca4, improvement in the function of the eye was observed. The authors therefore concluded that vectors derived from AAV5 could be useful for treating individuals with recessive Stargardt disease.
Journal reference: Serotype-dependent packaging of large genes in adeno-associated viral vectors results in effective gene delivery in mice. Journal of Clinical Investigation. April 16, 2008.
Adapted from materials provided by , via EurekAlert!, a service of AAAS.
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The life of Marie Schlau, a German Jewish girl born in 1833 hides great unsolved mysteries: accidents, disappearances, enigmas, unknown diagnoses, disturbing murders, love, tenderness, greed, lies, death ... alternatively a different story unfolds every time and takes us closer to the present. Thus, there are two parallel stories unravelling, each in a different age and place, which surprisingly converge in a revelatory chapter.
Paperback and Kindle versions for "The legacy of Marie Schlau" available for sale at Amazon now!
Currently, BabelFAmily is financing two promising research projects aimed at finding a cure for Friedreich's Ataxia. Whenever you make a donation to us or purchase a copy of "The legacy of Marie Schlau", this is where all funds raised will be devoted to:
1) Gene Therapy for Friedreich's Ataxia research project:
The project is the result of an initiative of Spanish people affected by this rare disease who are grouped in GENEFA in collaboration with the Spanish Federation of Ataxias and the BabelFAmily. The Friedreich’s Ataxia Research Alliance (FARA), one of the main patients’ associations in the United States now joins the endeavour.
2) Frataxin delivery research project:
The associations of patients and families Babel Family and the Asociación Granadina de la Ataxia de Friedreich (ASOGAF) channel 80,000 euros of their donations (50% from each organisation) into a new 18-month project at the Institute for Research in Biomedicine (IRB Barcelona). The project specifically aims to complete a step necessary in order to move towards a future frataxin replacement therapy for the brain, where the reduction of this protein causes the most damage in patients with Friedreich’s Ataxia.
The study is headed by Ernest Giralt, head of the Peptides and Proteins Lab, who has many years of experience and is a recognised expert in peptide chemistry and new systems of through which to delivery drugs to the brain, such as peptide shuttles—molecules that have the capacity to carry the drug across the barrier that surrounds and protects the brain. Since the lab started its relation with these patients’ associations in 2013*, it has been developing another two projects into Friedrich’s Ataxia.