期刊
SCIENCE TRANSLATIONAL MEDICINE
卷 11, 期 488, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/scitranslmed.aav8375
关键词
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资金
- NIH [2 T32 HL007586, HL134745, HL132999, HL119436]
- National Center for Advancing Translational Sciences of the NIH
- Institute for Translational Medicine and Therapeutics at the University of Pennsylvania [UL1-TR001878]
- Orphan Disease Center at the University of Pennsylvania [GE-16-001-IU]
- U.S. Department of Veterans Affairs (VA Merit Review) [1I01BX001176]
- Pulmonary Fibrosis Foundation
- Nemours Foundation
Monogenic lung diseases that are caused by mutations in surfactant genes of the pulmonary epithelium are marked by perinatal lethal respiratory failure or chronic diffuse parenchymal lung disease with few therapeutic options. Using a CRISPR fluorescent reporter system, we demonstrate that precisely timed in utero intra-amniotic delivery of CRISPR-Cas9 gene editing reagents during fetal development results in targeted and specific gene editing in fetal lungs. Pulmonary epithelial cells are predominantly targeted in this approach, with alveolar type 1, alveolar type 2, and airway secretory cells exhibiting high and persistent gene editing. We then used this in utero technique to evaluate a therapeutic approach to reduce the severity of the lethal interstitial lung disease observed in a mouse model of the human SFTPCI73T mutation. Embryonic expression of Sftpc(I73T) alleles is characterized by severe diffuse parenchymal lung damage and rapid demise of mutant mice at birth. After in utero CRISPR-Cas9-mediated inactivation of the mutant Sftpc(I73T) gene, fetuses and postnatal mice showed improved lung morphology and increased survival. These proof-of-concept studies demonstrate that in utero gene editing is a promising approach for treatment and rescue of monogenic lung diseases that are lethal at birth.
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