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Address: POB 245024
Tucson, AZ 85724-5044
Phone: (520) 626-4250
E-Mail: jmartinez@azcc.arizona.edu

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Research Interests

My overall interest is in the dysregulated signaling that occurs during tumor development and in applying the knowledge gained from our investigations to interfering with or circumventing those dysregulated pathways as a means for treating or preventing cancer. My diverse interests have resulted in the pursuit of three projects that each focus on different aspects of cancer signaling and tumor development. The first of these investigates the role that bile acids may have in promoting colon cancer. Here we are examining the effects that bile acids have on the cell signaling using molecular and cellular biology approaches as well as animal models to identify bile acid-activated signaling pathways which may be targets for preventive strategies. The second project examines the mechanisms that regulate activation of the p53 tumor suppressor protein. Our approach employes a genetic screen for mutant cell lines that are incapable of activating p53 in an effor to identify novel pathways that regulate the protein’s function and which may be targeted for inactivation during tumorigenesis. The third project focuses on a novel observation made while characterizing the interaction between p53 and the scaffolding protein 14-3-3 gamma. In these studies we are examining the possibility that 14-3-3 gamma may be instrumental in causing aneuploidy in lung cancers which frequently overexpress this protein and that wild-type p53 may act to downregulate this activity. Here the eventual goal is to develop agents for imaging and treating lung cancer.

Selected Publications