@article{90742289a21945dba74408886677260a,
title = "CRISPR-Based Adenine Editors Correct Nonsense Mutations in a Cystic Fibrosis Organoid Biobank",
abstract = "Adenine base editing (ABE) enables enzymatic conversion from A-T into G-C base pairs. ABE holds promise for clinical application, as it does not depend on the introduction of double-strand breaks, contrary to conventional CRISPR/Cas9-mediated genome engineering. Here, we describe a cystic fibrosis (CF) intestinal organoid biobank, representing 664 patients, of which \textasciitilde{}20\% can theoretically be repaired by ABE. We apply SpCas9-ABE (PAM recognition sequence: NGG) and xCas9-ABE (PAM recognition sequence: NGN) on four selected CF organoid samples. Genetic and functional repair was obtained in all four cases, while whole-genome sequencing (WGS) of corrected lines of two patients did not detect off-target mutations. These observations exemplify the value of large, patient-derived organoid biobanks representing hereditary disease and indicate that ABE may be safely applied in human cells.",
keywords = "Adenine, Biological Specimen Banks, CRISPR-Associated Protein 9/genetics, CRISPR-Cas Systems/genetics, Clustered Regularly Interspaced Short Palindromic Repeats, Codon, Nonsense, Cystic Fibrosis/genetics, Gene Editing, Humans, Organoids/metabolism",
author = "Geurts, \{Maarten H\} and \{de Poel\}, Eyleen and Amatngalim, \{Gimano D\} and Rurika Oka and Meijers, \{Fleur M\} and Evelien Kruisselbrink and \{van Mourik\}, Peter and Gitte Berkers and \{de Winter-de Groot\}, \{Karin M\} and Sabine Michel and Danya Muilwijk and Aalbers, \{Bente L\} and Jasper Mullenders and Boj, \{Sylvia F\} and Suen, \{Sylvia W F\} and Brunsveld, \{Jesse E\} and Janssens, \{Hettie M\} and Mall, \{Marcus A\} and Graeber, \{Simon Y\} and \{van Boxtel\}, Ruben and \{van der Ent\}, \{Cornelis K\} and Beekman, \{Jeffrey M\} and Hans Clevers",
note = "Copyright {\textcopyright} 2020 Elsevier Inc. All rights reserved.",
year = "2020",
month = apr,
day = "2",
doi = "10.1016/j.stem.2020.01.019",
language = "English",
volume = "26",
pages = "503--510.e7",
journal = "Cell stem cell",
issn = "1875-9777",
publisher = "Cell Press",
number = "4",
}