Bishop, J. Michael

Bishop, J. Michael

▪ American scientist
in full  John Michael Bishop 
born Feb. 22, 1936, York, Pa., U.S.

      American virologist and co-winner (with Harold Varmus (Varmus, Harold)) of the Nobel Prize for Physiology or Medicine in 1989 for achievements in clarifying the origins of cancer.

      Bishop graduated from Gettysburg College (Pa.) in 1957 and from Harvard Medical School in 1962. After spending two years in internship and residency at Massachusetts General Hospital, Boston, he became a researcher in virology at the National Institutes of Health, Bethesda, Md. In 1968 he joined the faculty of the University of California Medical Center in San Francisco, becoming a full professor in 1972. From 1981 he also served as director of the university's George F. Hooper Research Foundation. In 1998 Bishop was elected chancellor of the University of California, San Francisco.

      In 1970 Bishop teamed up with Varmus, and they set out to test the theory that healthy body cells contain dormant viral oncogenes (oncogene) that, when triggered, cause cancer. Working with the Rous sarcoma virus, known to cause cancer in chickens, Bishop and Varmus found that a gene similar to the cancer-causing gene within the virus was also present in healthy cells.

      In 1976 Bishop and Varmus, together with two colleagues—Dominique Stehelin and Peter Vogt—published their findings, concluding that the virus had taken up the gene responsible for the cancer from a normal cell. After the virus had infected the cell and begun its usual process of replication, it incorporated the gene into its own genetic material. Subsequent research showed that such genes can cause cancer in several ways. Even without viral involvement, these genes can be converted by certain chemical carcinogens into a form that allows uncontrolled cellular growth.

      Because the mechanism described by Bishop and Varmus seemed common to all forms of cancer, their work proved invaluable to cancer research. Today, scientists suspect that nearly 1 percent of the human genome, which contains approximately 25,000 genes, is made up of proto-oncogenes—genes that when altered or mutated from their original form have the ability to cause cancer in animals (see oncogene).

      Bishop was awarded the National Medal of Science in 2003. That same year, he published How to Win the Nobel Prize: An Unexpected Life in Science, a reflection on his life and work that also touches on historical aspects of science and on the intellectual environment of modern-day research.

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Universalium. 2010.

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