PMID- 10576741 OWN - NLM STAT- MEDLINE DCOM- 19991214 LR - 20190619 IS - 0036-8075 (Print) IS - 0036-8075 (Linking) VI - 286 IP - 5445 DP - 1999 Nov 26 TI - Differentiation stage-specific inhibition of the Raf-MEK-ERK pathway by Akt. PG - 1738-41 AB - Extracellular signals often result in simultaneous activation of both the Raf-MEK-ERK and PI3K-Akt pathways (where ERK is extracellular-regulated kinase, MEK is mitogen-activated protein kinase or ERK kinase, and PI3K is phosphatidylinositol 3-kinase). However, these two signaling pathways were shown to exert opposing effects on muscle cell hypertrophy. Furthermore, the PI3K-Akt pathway was shown to inhibit the Raf-MEK-ERK pathway; this cross-regulation depended on the differentiation state of the cell: Akt activation inhibited the Raf-MEK-ERK pathway in differentiated myotubes, but not in their myoblast precursors. The stage-specific inhibitory action of Akt correlated with its stage-specific ability to form a complex with Raf, suggesting the existence of differentially expressed mediators of an inhibitory Akt-Raf complex. FAU - Rommel, C AU - Rommel C AD - Regeneron Pharmaceuticals, 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA. FAU - Clarke, B A AU - Clarke BA FAU - Zimmermann, S AU - Zimmermann S FAU - Nunez, L AU - Nunez L FAU - Rossman, R AU - Rossman R FAU - Reid, K AU - Reid K FAU - Moelling, K AU - Moelling K FAU - Yancopoulos, G D AU - Yancopoulos GD FAU - Glass, D J AU - Glass DJ LA - eng PT - Journal Article PL - United States TA - Science JT - Science (New York, N.Y.) JID - 0404511 RN - 0 (Cdkn1a protein, mouse) RN - 0 (Cyclin-Dependent Kinase Inhibitor p21) RN - 0 (Cyclins) RN - 0 (Enzyme Inhibitors) RN - 0 (Flavonoids) RN - 0 (Myog protein, mouse) RN - 0 (Myogenin) RN - 0 (Proto-Oncogene Proteins) RN - 67763-96-6 (Insulin-Like Growth Factor I) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.11.1 (Protein-Serine-Threonine Kinases) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-raf) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - SJE1IO5E3I (2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one) SB - IM MH - Animals MH - Cell Differentiation MH - Cell Line MH - Cyclin-Dependent Kinase Inhibitor p21 MH - Cyclins/genetics MH - Enzyme Activation MH - Enzyme Inhibitors/pharmacology MH - Flavonoids/pharmacology MH - Insulin-Like Growth Factor I/pharmacology MH - MAP Kinase Signaling System/drug effects MH - Mice MH - Mitogen-Activated Protein Kinases/*antagonists & inhibitors/metabolism MH - Muscle, Skeletal/*cytology/*metabolism MH - Myogenin/genetics MH - Phenotype MH - Phosphatidylinositol 3-Kinases/metabolism MH - Phosphorylation MH - Protein-Serine-Threonine Kinases/*metabolism MH - Proto-Oncogene Proteins/*metabolism MH - Proto-Oncogene Proteins c-akt MH - Proto-Oncogene Proteins c-raf/*antagonists & inhibitors/metabolism MH - Signal Transduction MH - Transfection MH - Transgenes EDAT- 1999/11/27 00:00 MHDA- 1999/11/27 00:01 CRDT- 1999/11/27 00:00 PHST- 1999/11/27 00:00 [pubmed] PHST- 1999/11/27 00:01 [medline] PHST- 1999/11/27 00:00 [entrez] AID - 8036 [pii] AID - 10.1126/science.286.5445.1738 [doi] PST - ppublish SO - Science. 1999 Nov 26;286(5445):1738-41. doi: 10.1126/science.286.5445.1738.