🛠️ Invention or technique

Transgenic mouse by DNA microinjection (Gordon and Ruddle; supermouse)

Ratón transgénico por microinyección de ADN (Gordon y Ruddle; supermouse)

Date
1980-1982 · confidence medium
Place
Yale University, New Haven, Connecticut, United States
Credited to
Jon W. Gordon, Frank Ruddle and colleagues; Richard Palmiter and Ralph Brinster
Field
Life & health

⚠️ Disputed: the sources disagree.

What it is

Gordon and Ruddle injected DNA into the pronucleus of fertilised mouse eggs and obtained animals that integrated it and passed it on. In 1982 Palmiter and Brinster used the rat growth hormone gene to create the “supermice”, twice as large.

There are priority claims: Jaenisch and Mintz (1974) integrated SV40 DNA into mouse embryos (mosaic animals) and Jaenisch obtained germline transmission with retroviruses in 1976; Costantini and Lacy, and Wagner et al. published in 1981 almost simultaneously. The pronuclear microinjection that named the “transgenic mouse” is Gordon's (1980).

What it led to

  • animal models of human disease and oncomice
  • gene therapy and production of proteins in transgenic milk
  • technical basis of CRISPR-edited animals
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Sources✓ verified 2026-11-04