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Editing out fiveparalogs to create a mouse model of genetic emphysema.

Editing out fiveparalogs to create a mouse model of genetic emphysema.
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Borel F, Sun H, Zieger M, Cox A, Cardozo B, Li W, Oliveira G, Davis A, Gruntman A, Flotte TR, Brodsky MH, Hoffman AM, Elmallah MK, Mueller C,


Borel F, Sun H, Zieger M, Cox A, Cardozo B, Li W, Oliveira G, Davis A, Gruntman A, Flotte TR, Brodsky MH, Hoffman AM, Elmallah MK, Mueller C, (click to view)

Borel F, Sun H, Zieger M, Cox A, Cardozo B, Li W, Oliveira G, Davis A, Gruntman A, Flotte TR, Brodsky MH, Hoffman AM, Elmallah MK, Mueller C,

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Proceedings of the National Academy of Sciences of the United States of America 2018 02 16() pii 201713689
Abstract

Chronic obstructive pulmonary disease affects 10% of the worldwide population, and the leading genetic cause is α-1 antitrypsin (AAT) deficiency. Due to the complexity of the murine locus, which includes up to sixparalogs, no genetic animal model of the disease has been successfully generated until now. Here we create a quintupleknockout using CRISPR/Cas9-mediated genome editing. The phenotype recapitulates the human disease phenotype, i.e., absence of hepatic and circulating AAT translates functionally to a reduced capacity to inhibit neutrophil elastase. With age,null mice develop emphysema spontaneously, which can be induced in younger mice by a lipopolysaccharide challenge. This mouse models not only AAT deficiency but also emphysema and is a relevant genetic model and not one based on developmental impairment of alveolarization or elastase administration. We anticipate that this unique model will be highly relevant not only to the preclinical development of therapeutics for AAT deficiency, but also to emphysema and smoking research.

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