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A large body of evidence supports a correlation between inflammation and cancer, although the molecular mechanisms that govern this process are incompletely understood. Phosphatidylinositol 3-kinase (PI3K) is an enzyme that regulates the immune response and contributes to cell transformation in several tumor types. Here, we address the role of the PI3Kγ isoform in inflammatory bowel disease and in...
To investigate the role of signaling by the small GTPase Ral, we have generated mice deficient for RalGDS, a guanine nucleotide exchange factor that activates Ral. We show that RalGDS is dispensable for mouse development but plays a substantial role in Ras-induced oncogenesis. Lack of RalGDS results in reduced tumor incidence, size, and progression to malignancy in multistage skin carcinogenesis,...
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