'One-hit' event provides new opportunity for colon cancer prevention, say Fox Chase researchers

More than 30 years ago, Alfred Knudson Jr., M.D., Ph.D., revolutionized the field of cancer genetics by showing that a person must lose both their paternal and maternal copies of a particular class of cancer-inhibiting genes, called tumor-suppressor genes, in order to develop cancer. This theory, called the two-hit hypothesis, guided scientists around the globe in their quest for tumor suppressor genes.

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