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Correction of a Factor VIII genomic inversion with designer recombinasesÃ¯Â»Â¿

ABSTRACT: Despite advances in nuclease-based genome editing technologies, correcting human disease-causing genomic inversions remains a challenge. Here, we describe the potential use of a recombinase-based system to correct the 140 kb inversion of the F8 gene frequently found in patients diagnosed with severe Hemophilia A. Employing substrate-linked directed molecular evolution, we developed a coupled heterodimeric recombinase system (RecF8) achieving 30% inversion of the target sequence in human tissue culture cells. Transient RecF8 treatment of endothelial cells, differentiated from patient derived induced pluripotent stem cells (iPSCs) of a hemophilic donor, resulted in 12% correction of the inversion and restored Factor VIII mRNA expression. Our data suggests that designer-recombinases may represent efficient and specific means towards treatment of monogenic diseases caused by large gene inversions.

PROVIDER: EGAS00001005496 | EGA |

REPOSITORIES: EGA

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Correction of a Factor VIII genomic inversion with designer recombinases

Project description:Despite advances in nuclease-based genome editing technologies, correcting human disease-causing genomic inversions remains a challenge. Here, we describe the potential use of a recombinase-based system to correct a 140 kb int1h inversion frequently found in patients diagnosed with Hemophilia A. With the use of directed molecular evolution, we developed a linked heterodimeric recombinase system (RecF8) achieving 30% inversion of the target sequence in human tissue culture cells. Transient RecF8 treatment of endothelial cells, differentiated from int1h patient derived iPSCs, resulted in prominent correction of the inversion and restored Factor VIII mRNA expression. Our data suggest that the development of designer-recombinases represent an efficient and specific mean towards treatment of large gene inversions causing monogenic diseases.

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