Gene-edited pseudogene resurrection corrects p47phox-deficient chronic granulomatous disease.

ABSTRACT: Pseudogenes are duplicated genes with mutations rendering them nonfunctional. For single-gene disorders with homologous pseudogenes, the pseudogene might be a target for genetic correction. Autosomal-recessive p47phox-deficient chronic granulomatous disease (p47-CGD) is a life-threatening immune deficiency caused by mutations in NCF1, a gene with 2 pseudogenes, NCF1B and NCF1C. The most common NCF1 mutation, a GT deletion (?GT) at the start of exon 2 (>90% of alleles), is constitutive to NCF1B and NCF1C. NCF1 ?GT results in premature termination, undetectable protein expression, and defective production of antimicrobial superoxide in neutrophils. We examined strategies for p47-CGD gene correction using engineered zinc-finger nucleases targeting the exon 2 ?GT in induced pluripotent stem cells or CD34+ hematopoietic stem cells derived from p47-CGD patients. Correction of ?GT in NCF1 pseudogenes restores oxidase function in p47-CGD, providing the first demonstration that targeted restoration of pseudogene function can correct a monogenic disorder.

SUBMITTER: Merling RK 

PROVIDER: S-EPMC5727772 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature