CRISPR prime editing performed directly inside a human body for first time

· Science

Nature News reports a first for CRISPR: powerful prime editing has been used to alter DNA directly inside the human body. Prime editing is a newer form of gene editing that can insert, delete or rewrite short stretches of DNA without making full double-strand breaks, and it has until now been studied mainly in cells and laboratory animals. Moving the tool into a living patient marks a step beyond earlier in-body editing approaches, which relied on older CRISPR enzymes. The item gives no details on the patient, the disease targeted, the dose or the trial sponsor. The immediate effect is to open a new phase of clinical testing in which editing machinery is delivered to a patient's own cells rather than to cells removed and modified outside the body.

Why it matters：If in-body prime editing proves safe, gene editing shifts from ex vivo procedures toward direct treatments for genetic disease, reshaping clinical trial design and the regulatory path for gene therapies.

Key points

  • Prime editing can rewrite DNA without full double-strand breaks
  • Earlier in-body editing used older CRISPR enzymes
  • No patient, disease or trial details were disclosed

Sources (original reporting)

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