Title : Regulation of insulin action by ceramide: dual mechanisms linking ceramide accumulation to the inhibition of Akt/protein kinase B.

Pub. Date : 2004 Aug 27

PMID : 15220355






9 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 Regulation of insulin action by ceramide: dual mechanisms linking ceramide accumulation to the inhibition of Akt/protein kinase B. Ceramides AKT serine/threonine kinase 1 Homo sapiens
2 Regulation of insulin action by ceramide: dual mechanisms linking ceramide accumulation to the inhibition of Akt/protein kinase B. Ceramides AKT serine/threonine kinase 1 Homo sapiens
3 Herein we utilized deletion constructs encoding two different functional domains of Akt/PKB to identify which region of the enzyme conferred responsiveness to ceramide. Ceramides AKT serine/threonine kinase 1 Homo sapiens
4 Surprisingly the findings obtained with these separate domains reveal that ceramide blocks insulin stimulation of Akt/PKB by two independent mechanisms. Ceramides AKT serine/threonine kinase 1 Homo sapiens
5 Surprisingly the findings obtained with these separate domains reveal that ceramide blocks insulin stimulation of Akt/PKB by two independent mechanisms. Ceramides AKT serine/threonine kinase 1 Homo sapiens
6 First, using the isolated pleckstrin homology domain, we found that ceramide specifically blocks the translocation of Akt/PKB, but not its upstream activator phosphoinositide-dependent kinase-1, to the plasma membrane. Ceramides AKT serine/threonine kinase 1 Homo sapiens
7 Second, using a construct lacking this pleckstrin homology domain, which does not require translocation for activation, we found that ceramide stimulates the dephosphorylation of Akt/PKB by protein phosphatase 2A. Ceramides AKT serine/threonine kinase 1 Homo sapiens
8 Second, using a construct lacking this pleckstrin homology domain, which does not require translocation for activation, we found that ceramide stimulates the dephosphorylation of Akt/PKB by protein phosphatase 2A. Ceramides AKT serine/threonine kinase 1 Homo sapiens
9 Moreover the results obtained provide a unifying theory to account for the numerous dissenting reports investigating the actions of ceramide toward Akt/PKB. Ceramides AKT serine/threonine kinase 1 Homo sapiens