{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T21:00:58Z","timestamp":1790370058606,"version":"4.1.0"},"reference-count":32,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2019,2,1]],"date-time":"2019-02-01T00:00:00Z","timestamp":1548979200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2019,2,1]],"date-time":"2019-02-01T00:00:00Z","timestamp":1548979200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["The CRISPR Journal"],"published-print":{"date-parts":[[2019,2,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Genome editing is a tool that has many applications, including the validation of potential drug targets. However, performing genome editing in low-passage primary human cells with the greatest physiological relevance is notoriously difficult. High editing efficiency is desired because it enables gene knockouts (KO) to be generated in bulk cellular populations and circumvents the problem of having to generate clonal cell isolates. Here, we describe a single-step workflow enabling &gt;90% KO generation in primary human lung fibroblasts via CRISPR ribonucleoprotein delivery in the absence of antibiotic selection or clonal expansion. As proof of concept, we edited two SMAD family members and demonstrated that in response to transforming growth factor beta, SMAD3, but not SMAD2, is critical for deposition of type I collagen in the fibrotic response. The optimization of this workflow can be readily transferred to other primary cell types.<\/jats:p>","DOI":"10.1089\/crispr.2018.0047","type":"journal-article","created":{"date-parts":[[2019,2,21]],"date-time":"2019-02-21T10:03:35Z","timestamp":1550743415000},"page":"31-40","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":26,"title":["Single-Step, High-Efficiency CRISPR-Cas9 Genome Editing in Primary Human Disease-Derived Fibroblasts"],"prefix":"10.1177","volume":"2","author":[{"given":"Matteo","family":"Martufi","sequence":"first","affiliation":[{"name":"Target Sciences Respiratory Therapy Area, Medicines Research Centre, GlaxoSmithKline R&amp;D, Stevenage, United Kingdom."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert B.","family":"Good","sequence":"additional","affiliation":[{"name":"Fibrosis Discovery Performance Unit, Respiratory Therapy Area, Medicines Research Centre, GlaxoSmithKline 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