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2015 ; 21
(22
): 5008-12
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Molecular Pathways: Targeting Diacylglycerol Kinase Alpha in Cancer
#MMPMID26420856
Purow B
Clin Cancer Res
2015[Nov]; 21
(22
): 5008-12
PMID26420856
show ga
Lipid kinases have largely been neglected as targets in cancer, and an increasing
number of reports suggest diacylglycerol kinase alpha (DGK?) may be one with
promising therapeutic potential. DGK? is one of 10 DGK family members that
convert diacylglycerol (DAG) to phosphatidic acid (PA), and both DAG and PA are
critical lipid second messengers in the plasma membrane. A host of important
oncogenic proteins and pathways affect cancer cells in part through DGK?,
including the c-Met and VEGF receptors. Others partially mediate the effects of
DGK? inhibition in cancer, such as mTOR and HIF-1?. DGK? inhibition can directly
impair cancer cell viability, inhibits angiogenesis, and notably may also boost
T-cell activation and enhance cancer immunotherapies. Although two structurally
similar inhibitors of DGK? were established decades ago, they have seen minimal
in vivo usage, and it is unlikely that either of these older DGK? inhibitors will
have utility for cancer. An abandoned compound that also inhibits serotonin
receptors may have more translational potential as a DGK? inhibitor, but more
potent and specific DGK? inhibitors are sorely needed. Other DGK family members
may also provide therapeutic targets in cancer, but require further
investigation.