Correction of the Marfan Syndrome Pathogenic FBN1 Mutation by Base Editing in Human Cells and Heterozygous Embryos

Molecular Therapy : the Journal of the American Society of Gene Therapy
Yanting ZengXingxu Huang

Abstract

There are urgent demands for efficient treatment of heritable genetic diseases. The base editing technology has displayed its efficiency and precision in base substitution in human embryos, providing a potential early-stage treatment for genetic diseases. Taking advantage of this technology, we corrected a Marfan syndrome pathogenic mutation, FBN1T7498C. We first tested the feasibility in mutant cells, then successfully achieved genetic correction in heterozygous human embryos. The results showed that the BE3 mediated perfect correction at the efficiency of about 89%. Importantly, no off-target and indels were detected in any tested sites in samples by high-throughput deep sequencing combined with whole-genome sequencing analysis. Our study therefore suggests the efficiency and genetic safety of correcting a Marfan syndrome (MFS) pathogenic mutation in embryos by base editing.

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Methods Mentioned

BETA
transfection
genotyping
fluorescence activated cell sorting
PCR
flow cytometry

Software Mentioned

BE
BWA
GATK HaplotypeCaller
IndelRealigner
GATK
Genome Analysis Toolkit ( GATK
Sambamba

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