The compelling evidence that chronic use of aspirin or certainnonsteroidal antiinflammatory drugs (NSAIDs) can substantiallylower the risk of colon cancer has important implications, especiallybecause colon cancer is the second leading cause of cancer death.Aspirin and nonselective NSAIDs each inhibit the generationof prostaglandins by inhibiting the two cyclooxygenase (COX)enzymes that initiate prostaglandin synthesis, COX-1 and COX-2.NSAIDs that are selective for COX-2 also inhibit the generationof prostaglandins. COX-1 is constitutively expressed in thecolon, but COX-2 is inducible and markedly up-regulated in manycolon cancers. Interventional trials have shown a decreasedrisk of the . . . [Full Text of this Article]
Source Information
From the Department of Medicine and Ireland Cancer Center, Case Western Reserve University School of Medicine and Case Medical Center, Cleveland, and the Howard Hughes Medical Institute, Chevy Chase, MD.