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World’s first cloned mouse was created at UH in 1997 and now at Smithsonian museum

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Cumulina, the first cloned mouse, was created in a lab in 1997 using the “Honolulu Technique” developed by an international team led by Ryuzo Yanagimachi at the University of Hawaiʻi School of Medicine. Photo Courtesy: UH

Nearly 24 years after her birth made international headlines, Cumulina, the first cloned mouse and the first cloned mammal in the United States, was sent to the Smithsonian’s National Museum of American History in Washington, DC. 

The most celebrated mouse in scientific history was named for the cumulus cells whose nuclei were used to clone her.

Cumulina was created in a lab in 1997 using the distinctive “Honolulu Technique” developed by an international team led by Ryuzo Yanagimachi at the University of Hawaiʻi John A. Burns School of Medicine (JABSOM).


Yanagimachi’s work helped lay the groundwork for in vitro fertilization in the early 1960s. Although Yanagimachi officially retired in 2005, he continues to be an active researcher at UH Mānoa Institute for Biogenesis Research (IBR), which he founded.

Ryuzo Yanagimachi led an international team at the University of Hawaiʻi John A. Burns School of Medicine to create Cumulina, the world’s first cloned mouse. Photo Courtesy: UH

“I view Cumulina as being an ambassador to the world for the biomedical research that’s done at the University of Hawaiʻi,” said Dr. W. Steven Ward, director of the IBR and JABSOM professor. “The University of Hawaiʻi is a world-class Research 1 university. The discovery that a mouse could be cloned over and over again happened here before it happened anywhere else in the world.”

Cumulina lived to a ripe age of 31 months, equivalent to age 95 in human years. She died of natural causes in 2001 and until she was donated to the museum, had been kept at the UH IBR, part of JABSOM.


“The fact that the Smithsonian Institute so eagerly accepted this gift is confirmation of the place in history that the discovery has,” Ward said. “We are thrilled that the University of Hawaiʻi will now be recognized in the nation’s flagship history museum as having made a major discovery in biomedical science.”

Along with Cumulina, the museum also acquired a sheet of paper streaked with the mouse’s footprints, made one her second birthday, which speaks to the research team’s excitement about the mouse’s normal aging process.

“Cumulina is a wonderful addition to our collection,” Smithsonian curator Kristen Frederick-Frost said. “This tiny mouse will help our audiences explore complex topics, from the science of making copies of organisms to the ethics of doing so. When Cumulina was born, people wondered what, or who, was next. We still wonder. She is a part of the past that pushes us to consider the possibilities of the future.”


Like a celebrity, Cumulina was greeted in her new hometown with a special photoshoot courtesy of the Smithsonian. She’ll be featured in the National Treasure column in the June 2022 issue of Smithsonian Magazine. The mouse will be preserved in the museum’s Medicine and Science Division. 

“I’m happy that more people can see her than here at IBR,” Yanagimachi said “It’s very good for us and for Cumulina, too.”

While the museum is exploring future display opportunities, details about Cumulina will be available on the museum’s website and in the American Treasures column of the Smithsonian Magazine. Cumulina was the first mammal to be cloned more than once and for several generations.

The Yanagimachi Laboratory produced more than 50 carbon-copy mice using what was thought to be a more reliable cloning technique than the one used to create Dolly the Sheep. The clear reproducibility of the Honolulu Technique for cloning mammals convinced the world that cloning was real. 


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