Peter Nowell, Co-Discoverer of the Philadelphia Chromosome, Dies

The tumor biologist’s landmark discovery provided the first clear evidence that genetic mutations could lead to cancer, and gave rise to a crucial cancer drug.

Written byDiana Kwon
| 1 min read

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Peter Nowell (left) and colleague David Hungerford (right). Courtesy of Alice Hungerford

Peter Nowell, an acclaimed cancer researcher, died of Alzheimer’s disease complications on December 26 at age 88. Nowell is best known for co-discovering the Philadelphia chromosome while at the University of Pennsylvania with his colleague, David Hungerford of the Fox Chase Cancer Center.

While investigating leukemic cells in 1960, the two men isolated an abnormally small variant of chromosome 22 from chronic myelogenous leukemia (CML) patients. This finding, later dubbed the Philadelphia chromosome, was the first clear evidence that genetic mutations could lead to cancer. Researchers now know that the defect in the Philadelphia chromosome was the result of translocation, the movement of genetic material between chromosomes. This revelation led to subsequent discoveries of a similar mechanism in many other forms of cancer, and provided ...

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  • Diana is a freelance science journalist who covers the life sciences, health, and academic life. She’s a regular contributor to The Scientist and her work has appeared in several other publications, including Scientific American, Knowable, and Quanta. Diana was a former intern at The Scientist and she holds a master’s degree in neuroscience from McGill University. She’s currently based in Berlin, Germany.

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