Jeffrey (Jeff) Miki Ishibashi, a Senior Research Investigator in the Department of Genetics in the Perelman School of Medicine, died in a biking traffic accident on May 8. He was 50.

Born in Hamilton, Ontario, Dr. Ishibashi graduated from the University of Guelph and the University of Ottawa. In 2009, Dr. Ishibashi came to Penn as a Research Investigator in the lab of Patrick Seale in the Institute for Diabetes, Obesity, and Metabolism in the Perelman School of Medicine. In 2020, he became the Associate Director of Research at the Penn Gene Therapy Program. In February 2025, he returned to the Perelman School of Medicine by joining the department of genetics as a Senior Research Investigator in the lab of Klaus Kaestner. He was also a visiting scholar with the Purdue Institute for Cancer Research.

Dr. Ishibashi is survived by his mother, Barbara; father, Robert; brother, Brent (Suzy); nieces, Kirin and Kendra.

In lieu of flowers, donations can be made to a charity of the donor’s choice.