The Gene: An Intimate History

by Siddhartha Mukherjee

The story comes with a twist. One of the four genes used by Yamanaka to reverse cellular fate is called c-myc. Myc, the rejuvenation factor, is no ordinary gene: it is one of the most forceful regulators of cell growth and metabolism known in biology. Activated abnormally, it can certainly coax an adult cell back into an embryo-like state, thereby enabling Yamanaka’s cell-fate reversal experiment (this function requires the collaboration of the three other genes found by Yamanaka). But myc is also one of the most potent cancer-causing genes known in biology; it is also activated in leukemias and lymphomas, and in pancreatic, gastric, and uterine cancer. As in some ancient moral fable, the quest for eternal youthfulness appears to come at a terrifying collateral cost. The very genes that enable a cell to peel away mortality and age can also tip its fate toward malignant immortality, perpetual growth, and agelessness—the hallmarks of cancer.