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Attenuated Mitral Leaflet Enlargement Contributes to Functional Mitral Regurgitation After Myocardial Infarction Superficial Calcium Fracture After PCI as Assessed by OCT Angiographic derived endothelial shear stress: a new predictor of atherosclerotic disease progression Parallel Murine and Human Plaque Proteomics Reveals Pathways of Plaque Rupture OCT guidance during stent implantation in primary PCI: A randomized multicenter study with nine months of optical coherence tomography follow-up Cardiovascular risk prediction in type 2 diabetes: a comparison of 22 risk scores in primary care settings Fate of post-procedural malapposition of everolimus-eluting polymeric bioresorbable scaffold and everolimus-eluting cobalt chromiummetallic stent in human coronary arteries: sequential assessment with optical coherence tomography in ABSORB Japan trial Flow-Regulated Endothelial S1P Receptor-1 Signaling Sustains Vascular Development Feasibility and efficacy of the ultrashort side branch dedicated balloon in coronary bifurcation stenting Fractional flow reserve-guided PCI versus medical therapy in stable coronary disease

Original Research2017 Aug 24;548(7668):413-419.

JOURNAL:Nature. Article Link

Correction of a pathogenic gene mutation in human embryos

Ma H, Marti-Gutierrez N, Mitalipov S et al. Keywords: genome editing; MYBPC3 mutation; inherited hypertrophic cardiomyopathy

ABSTRACT

Genome editing has potential for the targeted correction of germline mutations. Here we describe the correction of the heterozygous MYBPC3 mutation in human preimplantation embryos with precise CRISPR-Cas9-based targeting accuracy and high homology-directed repair efficiency by activating an endogenous, germline-specific DNA repair response. Induced double-strand breaks (DSBs) at the mutant paternal allele were predominantly repaired using the homologous wild-type maternal gene instead of a synthetic DNA template. By modulating the cell cycle stage at which the DSB was induced, we were able to avoid mosaicism in cleaving embryos and achieve a high yield of homozygous embryos carrying the wild-type MYBPC3 gene without evidence of off-target mutations. The efficiency, accuracy and safety of the approach presented suggest that it has potential to be used for the correction of heritable mutations in human embryos by complementing preimplantation genetic diagnosis. However, much remains to be considered before clinical applications, including the reproducibility of the technique with other heterozygous mutations.