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Rapid and definitive treatment of phenylketonuria in variant-humanized mice with corrective editing

Author

Listed:
  • Dominique L. Brooks

    (Perelman School of Medicine at the University of Pennsylvania
    Perelman School of Medicine at the University of Pennsylvania
    Perelman School of Medicine at the University of Pennsylvania)

  • Manuel J. Carrasco

    (George Mason University)

  • Ping Qu

    (Perelman School of Medicine at the University of Pennsylvania
    Perelman School of Medicine at the University of Pennsylvania
    Perelman School of Medicine at the University of Pennsylvania)

  • William H. Peranteau

    (Children’s Hospital of Philadelphia
    Children’s Hospital of Philadelphia)

  • Rebecca C. Ahrens-Nicklas

    (Children’s Hospital of Philadelphia)

  • Kiran Musunuru

    (Perelman School of Medicine at the University of Pennsylvania
    Perelman School of Medicine at the University of Pennsylvania
    Perelman School of Medicine at the University of Pennsylvania)

  • Mohamad-Gabriel Alameh

    (George Mason University
    Perelman School of Medicine at the University of Pennsylvania)

  • Xiao Wang

    (Perelman School of Medicine at the University of Pennsylvania
    Perelman School of Medicine at the University of Pennsylvania
    Perelman School of Medicine at the University of Pennsylvania)

Abstract

Phenylketonuria (PKU), an autosomal recessive disorder caused by pathogenic variants in the phenylalanine hydroxylase (PAH) gene, results in the accumulation of blood phenylalanine (Phe) to neurotoxic levels. Current dietary and medical treatments are chronic and reduce, rather than normalize, blood Phe levels. Among the most frequently occurring PAH variants in PKU patients is the P281L (c.842C>T) variant. Using a CRISPR prime-edited hepatocyte cell line and a humanized PKU mouse model, we demonstrate efficient in vitro and in vivo correction of the P281L variant with adenine base editing. With the delivery of ABE8.8 mRNA and either of two guide RNAs in vivo using lipid nanoparticles (LNPs) in humanized PKU mice, we observe complete and durable normalization of blood Phe levels within 48 h of treatment, resulting from corrective PAH editing in the liver. These studies nominate a drug candidate for further development as a definitive treatment for a subset of PKU patients.

Suggested Citation

  • Dominique L. Brooks & Manuel J. Carrasco & Ping Qu & William H. Peranteau & Rebecca C. Ahrens-Nicklas & Kiran Musunuru & Mohamad-Gabriel Alameh & Xiao Wang, 2023. "Rapid and definitive treatment of phenylketonuria in variant-humanized mice with corrective editing," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39246-2
    DOI: 10.1038/s41467-023-39246-2
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    References listed on IDEAS

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