Title : Oleanane triterpenoid CDDO-Me inhibits Akt activity without affecting PDK1 kinase or PP2A phosphatase activity in cancer cells.

Pub. Date : 2012 Jan 6

PMID : 22177954






14 Functional Relationships(s)
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1 Oleanane triterpenoid CDDO-Me inhibits Akt activity without affecting PDK1 kinase or PP2A phosphatase activity in cancer cells. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
2 Our previous studies have shown that methyl-2-cyano-3,12-dioxooleana-1,9(11)-dien-28-oate (CDDO-Me), a oleanane synthetic triterpenoid induces apoptosis in prostate cancer cells by inhibiting the Akt/NF-kappaB/mTOR signaling cascade; however, the mechanism by which CDDO-Me inhibits Akt/NF-kappaB/mTOR signaling has remained undetermined. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
3 Our previous studies have shown that methyl-2-cyano-3,12-dioxooleana-1,9(11)-dien-28-oate (CDDO-Me), a oleanane synthetic triterpenoid induces apoptosis in prostate cancer cells by inhibiting the Akt/NF-kappaB/mTOR signaling cascade; however, the mechanism by which CDDO-Me inhibits Akt/NF-kappaB/mTOR signaling has remained undetermined. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
4 Present studies show that Akt plays a critical role in the response of prostate cancer cells to CDDO-Me. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
5 Silencing of Akt sensitized PC-3 cells to CDDO-Me, whereas its overexpression rendered them resistant to CDDO-Me. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
6 Evaluation of the effect of CDDO-Me on Akt which lies upstream of NF-kappaB and mTOR showed that CDDO-Me directly inhibits the Akt kinase activity in cell-free kinase activity assay and in vivo without modulating the activity of PDK1, the upstream kinase that phosphorylates and activates Akt. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
7 Evaluation of the effect of CDDO-Me on Akt which lies upstream of NF-kappaB and mTOR showed that CDDO-Me directly inhibits the Akt kinase activity in cell-free kinase activity assay and in vivo without modulating the activity of PDK1, the upstream kinase that phosphorylates and activates Akt. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
8 Evaluation of the effect of CDDO-Me on Akt which lies upstream of NF-kappaB and mTOR showed that CDDO-Me directly inhibits the Akt kinase activity in cell-free kinase activity assay and in vivo without modulating the activity of PDK1, the upstream kinase that phosphorylates and activates Akt. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
9 Evaluation of the effect of CDDO-Me on Akt which lies upstream of NF-kappaB and mTOR showed that CDDO-Me directly inhibits the Akt kinase activity in cell-free kinase activity assay and in vivo without modulating the activity of PDK1, the upstream kinase that phosphorylates and activates Akt. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
10 Evaluation of the effect of CDDO-Me on Akt which lies upstream of NF-kappaB and mTOR showed that CDDO-Me directly inhibits the Akt kinase activity in cell-free kinase activity assay and in vivo without modulating the activity of PDK1, the upstream kinase that phosphorylates and activates Akt. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
11 Evaluation of the effect of CDDO-Me on Akt which lies upstream of NF-kappaB and mTOR showed that CDDO-Me directly inhibits the Akt kinase activity in cell-free kinase activity assay and in vivo without modulating the activity of PDK1, the upstream kinase that phosphorylates and activates Akt. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
12 Further, inhibition of p-Akt by CDDO-Me was not attributable to an increase in the activity of protein phosphatase 2A (PP2A) or PH domain/leucine-rich repeat protein phosphatase1 (PHLPP1) both of which dephosphorylate p-Akt. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
13 These findings show that Akt is a direct target of CDDO-Me in the Akt/NF-kappaB/mTOR prosurvival signaling axis. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens
14 These findings show that Akt is a direct target of CDDO-Me in the Akt/NF-kappaB/mTOR prosurvival signaling axis. bardoxolone methyl AKT serine/threonine kinase 1 Homo sapiens