Molecular On-off Switches for Cancer and Autoimmunity Defined

"We hope the ideas put forward in this article will stimulate additional experiments to test these novel concepts," said Arnold Levine, Ph.D., co-author of the study from the Institute for Advanced Study in Princeton, New Jersey. "Among those experiments are the synthesis of new drugs to inhibit pathways that could change the course of a disease."

After a review of existing experimental literature, Levine and colleagues concluded that a new class of drugs could be developed to address the conflicting nature of oncogenes and tumor suppressor genes. Specifically, the research paper published in The FASEB Journal examines the roles of the p53 tumor suppressor and the oncogene, NF-kappaB. The p53 suppressor limits the consequences of stress by initiating cell death and promoting metabolic patterns in the cell. The oncogene NF-kappaB on the other hand, promotes cell division resulting in the synthesis of substrates for cell division. These two cellular responses, both of which have evolved to handle different types of stress, have adopted opposite strategies and cannot function in the same cell at the same time. As a result, Levine and colleagues speculate that drugs could be developed to take advantage of the fact that if one factor is activated, the other is rendered inactive. This could be achieved at several places in both the p53 and NF-kappaB pathways where regulatory proteins act on both with opposite functional consequences.

"Our cells use the p53 and NF-kappaB pathways to respond to cellular stress: one controls cancer, the other immunity. If they get out of balance, we're in trouble.," said Gerald Weissmann, M.D., Editor-in-Chief of The FASEB Journal. "Thanks to this work we can start restore the balance by means of new drugs."