2014
Pigment Epithelium-Derived Factor (PEDF) Suppresses IL-1β-Mediated c-Jun N-Terminal Kinase (JNK) Activation to Improve Hepatocyte Insulin Signaling
Gattu AK, Birkenfeld AL, Iwakiri Y, Jay S, Saltzman M, Doll J, Protiva P, Samuel VT, Crawford SE, Chung C. Pigment Epithelium-Derived Factor (PEDF) Suppresses IL-1β-Mediated c-Jun N-Terminal Kinase (JNK) Activation to Improve Hepatocyte Insulin Signaling. Endocrinology 2014, 155: 1373-1385. PMID: 24456163, PMCID: PMC5393334, DOI: 10.1210/en.2013-1785.Peer-Reviewed Original ResearchMeSH KeywordsAdipocytesAnimalsEye ProteinsGene Expression RegulationGlucose Tolerance TestHepatocytesHumansInflammationInsulinInsulin ResistanceInterleukin-1betaJNK Mitogen-Activated Protein KinasesLiverMaleMetabolic SyndromeMetabolomicsMiceMice, Inbred C57BLMice, KnockoutMicrospheresNerve Growth FactorsObesityPalmitic AcidPhenotypeRNA InterferenceSerpinsSignal TransductionSuccinic AcidConceptsPigment epithelium-derived factorKO miceMetabolic syndromeIL-1βC-Jun N-terminal kinase (JNK) activationElevated pigment epithelium-derived factorIL-1β challengeHuman hepatocytesIL-1β expressionHuman metabolic syndromeEpithelium-derived factorPEDF-knockout miceInflammatory markersGlucose intoleranceSerum levelsC-Jun N-terminal kinaseKinase activationAntiinflammatory proteinHepatic insulinKnockout micePigment epitheliumN-terminal kinaseMiceSyndromeMetabolic homeostasis
2013
Determination of mesenchymal stem cell fate by pigment epithelium‐derived factor (PEDF) results in increased adiposity and reduced bone mineral content
Gattu AK, Swenson ES, Iwakiri Y, Samuel VT, Troiano N, Berry R, Church CD, Rodeheffer MS, Carpenter TO, Chung C. Determination of mesenchymal stem cell fate by pigment epithelium‐derived factor (PEDF) results in increased adiposity and reduced bone mineral content. The FASEB Journal 2013, 27: 4384-4394. PMID: 23887690, PMCID: PMC3804749, DOI: 10.1096/fj.13-232900.Peer-Reviewed Original ResearchConceptsPigment epithelium-derived factorMesenchymal stem cell fateHuman MSCsMesenchymal stem cell differentiationStem cell fateStem cell differentiationEpithelium-derived factorCell fateOsteogenesis imperfecta type VISignal transductionMSC differentiationNegative regulatorSERPINF1 geneProtein productsOsteoblast differentiationCell differentiationOsteoblast precursorsHuman diseasesPEDF-knockout micePeroxisome proliferator-activated receptorDifferentiation patternsMurine MSCsProliferator-activated receptorAdipocyte markersControl-treated cells
2011
Pigment Epithelium-Derived Factor Regulates Early Pancreatic Fibrotic Responses and Suppresses the Profibrotic Cytokine Thrombospondin-1
Schmitz JC, Protiva P, Gattu AK, Utsumi T, Iwakiri Y, Neto AG, Quinn M, Cornwell ML, Fitchev P, Lugea A, Crawford SE, Chung C. Pigment Epithelium-Derived Factor Regulates Early Pancreatic Fibrotic Responses and Suppresses the Profibrotic Cytokine Thrombospondin-1. American Journal Of Pathology 2011, 179: 2990-2999. PMID: 21964188, PMCID: PMC3260804, DOI: 10.1016/j.ajpath.2011.08.009.Peer-Reviewed Original ResearchConceptsPigment epithelium-derived factorWild-type miceLoss of PEDFPEDF expressionQuantitative real-time PCRFibrotic responseNormal extracellular matrixWild-type animalsReal-time PCRSmooth muscle actin stainingExtracellular matrixIntragastric feeding modelMice fed ethanolPancreatitis responsesEarly fibrotic responseEpithelium-derived factorMuscle actin stainingSirius red stainingExpression levelsThrombospondin-1Actin stainingFibrogenic markersMore fibrosisPEDF overexpressionEthanol diet