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Multifunctional roles of PKC?: Opportunities for targeted therapy in human disease #MMPMID27179744
Reyland ME; Jones DN
Pharmacol Ther 2016[Sep]; 165 (ä): 1-13 PMID27179744show ga
The serine?threonine protein kinase, protein kinase C-? (PKC?), is emerging as a bi-functional regulator of cell death and proliferation. Studies in PKC??/? mice have confirmed a pro-apoptotic role for this kinase in response to DNA damage and a tumor promoter role in some oncogenic contexts. In non-transformed cells, inhibition of PKC? suppresses the release of cytochrome c and caspase activation, indicating a function upstream of apoptotic pathways. Data from PKC??/? mice demonstrate a role for PKC? in the execution of DNA damage-induced and physiologic apoptosis. This has led to the important finding that inhibitors of PKC? can be used therapeutically to reduce irradiation and chemotherapy-induced toxicity. By contrast, PKC? is a tumor promoter in mouse models of mammary gland and lung cancer, and increased PKC? expression is a negative prognostic indicator in Her2+ and other subtypes of human breast cancer. Understanding how these distinct functions of PKC? are regulated is critical for the design of therapeutics to target this pathway. This review will discuss what is currently known about biological roles of PKC? and prospects for targeting PKC? in human disease.