0000000001177409

AUTHOR

Yusu Gu

showing 2 related works from this author

Heart-targeted overexpression of caspase3 in mice increases infarct size and depresses cardiac function

2001

Up-regulation of proapoptotic genes has been reported in heart failure and myocardial infarction. To determine whether caspase genes can affect cardiac function, a transgenic mouse was generated. Cardiac tissue-specific overexpression of the proapoptotic gene Caspase3 was induced by using the rat promoter of α-myosin heavy chain, a model that may represent a unique tool for investigating new molecules and antiapoptotic therapeutic strategies. Cardiac-specific Caspase3 expression induced transient depression of cardiac function and abnormal nuclear and myofibrillar ultrastructural damage. When subjected to myocardial ischemia–reperfusion injury, Caspase3 transgenic mice showed increased inf…

Genetically modified mouseCardiac function curveDNA ComplementaryTransgeneRecombinant Fusion ProteinsMyocardial InfarctionMyocardial IschemiaCaspase 3ApoptosisMice TransgenicMyocardial Reperfusion InjuryDNA FragmentationContractilityMiceVentricular Dysfunction LeftmedicineAnimalsHumansGenetic Predisposition to DiseaseMyocardial infarctionCaspaseMultidisciplinarybiologyCaspase 3MyocardiumBiological Sciencesmedicine.diseasePhenotypeGene Expression RegulationEchocardiographyOrgan SpecificityHeart failureCaspasesCancer researchbiology.proteincardiovascular system
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Akt induces enhanced myocardial contractility and cell size in vivo in transgenic mice

2002

The serine-threonine kinase Akt seems to be central in mediating stimuli from different classes of receptors. In fact, both IGF-1 and IL6-like cytokines induce hypertrophic and antiapoptotic signals in cardiomyocytes through PI3K-dependent Akt activation. More recently, it was shown that Akt is involved also in the hypertrophic and antiapoptotic effects of β-adrenergic stimulation. Thus, to determine the effects of Akt on cardiac function in vivo, we generated a model of cardiac-specific Akt overexpression in mice. Transgenic mice were generated by using the E40K, constitutively active mutant of Akt linked to the rat α-myosin heavy chain promoter. The effects of cardiac-selective Akt overex…

Gene ExpressionTransgenicGlycogen Synthase Kinase 3MiceGSK-3Receptorsgenetics/physiologycytology/metabolismMultidisciplinaryBiological SciencesProtein-Serine-Threonine KinasesDNA-Binding Proteinsenzymology/genetics/pathologyAdrenergicPhosphorylationSignal transductionMitogen-Activated Protein KinasesSignal Transductionmedicine.medical_specialtyCardiomyopathyAnimals; Calcium-Calmodulin-Dependent Protein Kinases; metabolism; Cardiomyopathy; Hypertrophic; enzymology/genetics/pathology; Cell Size; physiology; DNA-Binding Proteins; GATA4 Transcription Factor; Gene Expression; Glycogen Synthase Kinase 3; Mice; Transgenic; Mitogen-Activated Protein Kinases; Myocardial Contraction; Myocardium; cytology/metabolism; Point Mutation; Protein-Serine-Threonine Kinases; Proto-Oncogene Proteins c-akt; Proto-Oncogene Proteins; genetics/physiology; Rats; Receptors; Adrenergic; beta; Signal Transduction; Transcription FactorsMice TransgenicBiologyProtein Serine-Threonine KinasesContractilityIn vivoInternal medicineProto-Oncogene ProteinsReceptors Adrenergic betamedicineAnimalsPoint MutationGlycogen synthaseProtein kinase BPI3K/AKT/mTOR pathwayCell SizeMyocardiumCardiomyopathy HypertrophicMyocardial ContractionGATA4 Transcription FactorRatsEndocrinologyHypertrophicphysiologyCalcium-Calmodulin-Dependent Protein Kinasesbiology.proteinbetametabolismProto-Oncogene Proteins c-aktTranscription Factors
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