Although originally intended as an antidiabetic, vincristine at small doses was found to kill leukemia cells. Rapidly growing cells, such as those of leukemia, typically create a skeletal scaffold of proteins (called microtubules) that allows two daughter cells to separate from each other and thereby complete cell division. Vincristine works by binding to the end of these microtubules and then paralyzing the cellular skeleton in its grip—thus, quite literally, evoking the Latin word after which it was originally named.
