15. Mayapple: Testicular Cancer Treatment
Native Americans used this North American plant topically for skin conditions. Its rhizomes contain podophyllotoxin, which scientists modified to create etoposide and teniposide. These semi-synthetic derivatives target DNA topoisomerase II, disrupting cancer cell division. Chemical modifications improved water solubility and reduced toxicity. Etoposide plays a critical role in treating testicular cancer, small-cell lung cancer, and certain leukemias. These treatments have significantly improved survival rates for these once-deadly cancers.