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Birket, Susan E; Davis, Joy M; Fernandez-Petty, Courtney M; Henderson, Alexander G; Oden, Ashley M; Tang, LiPing; Wen, Hui; Hong, Jeong; Fu, Lianwu; Chambers, Andre; Fields, Alvin; Zhao, Gojun; Tearney, Guillermo J; Sorscher, Eric J; Rowe, Steven M
American journal of respiratory and critical care medicine, 11/2020, Letnik: 202, Številka: 9Journal Article
Animal models have been highly informative for understanding the characteristics, onset, and progression of cystic fibrosis (CF) lung disease. In particular, the CFTR rat has revealed insights into the airway mucus defect characteristic of CF but does not replicate a human-relevant CFTR (cystic fibrosis transmembrane conductance regulator) variant. We hypothesized that a rat expressing a humanized version of CFTR and harboring the ivacaftor-sensitive variant G551D could be used to test the impact of CFTR modulators on pathophysiologic development and correction. In this study, we describe a humanized-CFTR rat expressing the G551D variant obtained by zinc finger nuclease editing of a human complementary DNA superexon, spanning exon 2-27, with a 5' insertion site into the rat gene just beyond intron 1. This targeted insertion takes advantage of the endogenous rat promoter, resulting in appropriate expression compared with wild-type animals. The bioelectric phenotype of the epithelia recapitulates the expected absence of CFTR activity, which was restored with ivacaftor. Large airway defects, including depleted airway surface liquid and periciliary layers, delayed mucus transport rates, and increased mucus viscosity, were normalized after the administration of ivacaftor. This model is useful to understand the mechanisms of disease and the extent of pathology reversal with CFTR modulators.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Vir: Osebne bibliografije
in: SICRIS
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