2010
Activation of Hedgehog Signaling by the Environmental Toxicant Arsenic May Contribute to the Etiology of Arsenic-Induced Tumors
Fei D, Li H, Kozul C, Black K, Singh S, Gosse J, DiRenzo J, Martin K, Wang B, Hamilton J, Karagas M, Robbins D. Activation of Hedgehog Signaling by the Environmental Toxicant Arsenic May Contribute to the Etiology of Arsenic-Induced Tumors. Cancer Research 2010, 70: 1981-1988. PMID: 20179202, PMCID: PMC2831120, DOI: 10.1158/0008-5472.can-09-2898.Peer-Reviewed Original ResearchConceptsArsenic exposureBladder cancerEnvironmental toxicant arsenicBladder cancer patientsSignificant health problemVariety of tumorsHedgehog signalingCancer patientsHealth problemsHigh levelsTumor samplesCancerHedgehog activitySame cancerHuman carcinogenesisMillions of peopleEtiologyTumorsExposureProgressionHedgehogTissue culture cellsActivationSignalingPatients
2006
Rapamycin inhibits cell motility by suppression of mTOR-mediated S6K1 and 4E-BP1 pathways
Liu L, Li F, Cardelli J, Martin K, Blenis J, Huang S. Rapamycin inhibits cell motility by suppression of mTOR-mediated S6K1 and 4E-BP1 pathways. Oncogene 2006, 25: 7029-7040. PMID: 16715128, DOI: 10.1038/sj.onc.1209691.Peer-Reviewed Original ResearchMeSH KeywordsAdaptor Proteins, Signal TransducingAnimalsCattleCell Cycle ProteinsCell LineCell MovementCytoprotectionDown-RegulationEnzyme ActivationHumansInsulin-Like Growth Factor IMicePhosphoproteinsPhosphorylationProtein KinasesRibosomal Protein S6 Kinases, 70-kDaSerumSignal TransductionSirolimusTOR Serine-Threonine KinasesTranscription FactorsConceptsCell motilityRNA interferenceEukaryotic initiation factor 4EDownregulation of RaptorType I insulin-like growth factorMTOR kinase activityInitiation factor 4ES6 kinase 1Rapamycin inhibitionTumor cell motilityResistant mutantsSuppression of mTORP70 S6K1Kinase activityKinase 1S6K1Mammalian targetRapamycinProtein 1Effect of rapamycinConsequence of inhibitionCell linesMutantsRaptorsMotility
2005
Endothelial cell activation of the smooth muscle cell phosphoinositide 3-kinase/Akt pathway promotes differentiation
Brown D, Rzucidlo E, Merenick B, Wagner R, Martin K, Powell R. Endothelial cell activation of the smooth muscle cell phosphoinositide 3-kinase/Akt pathway promotes differentiation. Journal Of Vascular Surgery 2005, 41: 509-516. PMID: 15838487, DOI: 10.1016/j.jvs.2004.12.024.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAorta, ThoracicCattleCell DifferentiationCells, CulturedCoculture TechniquesEndothelial CellsMuscle, Smooth, VascularMyocytes, Smooth MusclePhenotypePhosphatidylinositol 3-KinasesProtein Serine-Threonine KinasesProtein-Tyrosine KinasesProto-Oncogene ProteinsProto-Oncogene Proteins c-aktSignal TransductionConceptsEC/SMCDifferentiated SMC phenotypeSMC phenotypeSMC differentiationSmooth muscle cellsAkt pathwayProtein markersProtein kinase AktAdenoviral overexpressionContractile protein markersDominant-negative AktEndothelial cellsOpposite endothelial cellsBlood vessel developmentRapid Akt phosphorylationPI3K/Akt pathwayMuscle cellsWestern blottingKinase AktAbility of ECsActive AktPhosphoinositide 3Kinase activityMolecular signalsSynthetic phenotype
2003
The mTOR/p70 S6K1 pathway regulates vascular smooth muscle cell differentiation
Martin K, Rzucidlo E, Merenick B, Fingar D, Brown D, Wagner R, Powell R. The mTOR/p70 S6K1 pathway regulates vascular smooth muscle cell differentiation. American Journal Of Physiology - Cell Physiology 2003, 286: c507-c517. PMID: 14592809, DOI: 10.1152/ajpcell.00201.2003.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAorta, ThoracicBiomarkersCattleCell Cycle ProteinsCell DifferentiationCells, CulturedCyclin-Dependent Kinase Inhibitor p21Cyclin-Dependent Kinase Inhibitor p27CyclinsEndothelium, VascularExtracellular Matrix ProteinsImmunosuppressive AgentsMuscle ContractionMuscle, Smooth, VascularPhenotypeProtein KinasesRibosomal Protein S6 Kinases, 70-kDaSignal TransductionSirolimusTOR Serine-Threonine KinasesTumor Suppressor ProteinsConceptsVascular smooth muscle cellsVSMC differentiationVascular smooth muscle cell differentiationSmooth muscle cell differentiationVSMC gene expressionRapamycin-sensitive mTORMuscle cell differentiationContractile morphologyCyclin-dependent kinase inhibitorCell cycle withdrawalExtracellular matrix protein synthesisContractile proteinsMTOR pathway inhibitor rapamycinMuscle alpha-actinTranscriptional controlMatrix protein synthesisNovel functionGene expressionMigratory phenotypeRapamycin inductionMultiple speciesCell differentiationInhibitor rapamycinS6K1 pathwayProtein synthesis