Genetic repair of a human induced pluripotent cell line from patient with Dutch-type cerebral amyloid angiopathy.

Dutch-type cerebral amyloid angiopathy (D-CAA), also known as hereditary cerebral haemorrhage with amyloidosis-Dutch type (HCHWA-D), is an autosomal dominant disorder caused by a G to C transversion in codon 693 of the amyloid precursor protein (APP) that results in a Gln-to-Glu amino acid substitution. CRISPR-Cas9 editing was used for genetic correction of the mutation in a human induced pluripotent stem cell (hiPSC-) line established previously. The isogenic hiPSCs generated showed typical pluripotent stem cell morphology, expressed all markers of undifferentiated state, displayed a normal karyotype and had the capacity to differentiate into the three germ layers.