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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Inositol hexaphosphate represses telomerase activity and translocates TERT from the nucleus in mouse and human prostate cancer cells via the deactivation of Akt and PKCalpha.

Inositol hexaphosphate (IP6) has anti-proliferative effects on a variety of cancer cells, including prostate cancer. However, the molecular mechanism of anti-proliferative effects of IP6 is not entirely understood. Since the activation of telomerase is crucial for cells to gain immortality and proliferation ability, we examined the role of IP6 in the regulation of telomerase activity in prostate cancer cells. Here, we show that IP6 represses telomerase activity in mouse and human prostate cancer cells dose-dependently. In addition, IP6 prevents the translocation of TERT to the nucleus. Since phosphorylation of TERT by Akt and/or PKCalpha is necessary for nuclear translocation, we examined phosphorylation of Akt and PKCalpha after IP6 treatments. Our results show that IP6 inhibits phosphorylation of Akt and PKCalpha. These results show for the first time that IP6 represses telomerase activity in prostate cancer cells by posttranslational modification of TERT via the deactivation of Akt and PKCalpha.[1]

References

  1. Inositol hexaphosphate represses telomerase activity and translocates TERT from the nucleus in mouse and human prostate cancer cells via the deactivation of Akt and PKCalpha. Jagadeesh, S., Banerjee, P.P. Biochem. Biophys. Res. Commun. (2006) [Pubmed]
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