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First Personalized Gene Therapy Using Base Editing Shows Promising Results in Baby with Rare Disorder

  • Researchers treated a Pennsylvania baby with a rare genetic disorder using a personalized gene editing therapy in early 2025.
  • The baby, diagnosed with severe CPS1 deficiency shortly after birth, received a custom therapy created within six months to fix his faulty gene.
  • The treatment used lipid nanoparticles to deliver CRISPR-based editing to liver cells, and the infant showed improved eating, recovery from colds, and reduced medication.
  • Dr. Kiran Musunuru noted the therapy's cost was comparable to an $800,000 liver transplant and expected costs to fall as development speeds and economies of scale improve.
  • Experts predicted this milestone could accelerate treatments for rare genetic diseases within five to ten years, potentially helping millions left behind by current genetic medicine.
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Nature broke the news in United Kingdom on Thursday, May 15, 2025.
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