Project description:Background and Aims: It is known that inflammatory processes are activated in heart failure, but the regulation of cytokines and their role in the pathogenesis of the disease are not well understood. We have identified fractalkine as a possible novel mediator in HF development. To address this issue, we have performed microarray analysis of cardiomyocytes treated with different isoforms of fractalkine. Methods: Cardiomyocytes isolated from adult rat hearts and treated with different forms of fractalkine for 24 hours. Control cells were treated with BSA. Molecular alterations in myocardial tissue were measured by using cDNA microarrays. Molecular pathways affected were identified by the Ingenuity Pathway Analysis software. Results: Several molecular pathways were affected upon fractalkine stimulation of adult cardiomyocytes. Keywords: Fractalkines effect on cardiomyocytes
Project description:Background and Aims: It is known that inflammatory processes are activated in heart failure, but the regulation of cytokines and their role in the pathogenesis of the disease are not well understood. We have identified fractalkine as a possible novel mediator in HF development. To address this issue, we have performed microarray analysis of cardiomyocytes treated with different isoforms of fractalkine. Methods: Cardiomyocytes isolated from adult rat hearts and treated with different forms of fractalkine for 24 hours. Control cells were treated with BSA. Molecular alterations in myocardial tissue were measured by using cDNA microarrays. Molecular pathways affected were identified by the Ingenuity Pathway Analysis software. Results: Several molecular pathways were affected upon fractalkine stimulation of adult cardiomyocytes. Experiment Overall Design: Cardiomyocytes isolated from adult rat hearts at three different timepoints. Five fractalkine treated samples and five control samples were pairwise analyzed. The cells were from three different isolations. Treated and untreated cells from the same isolation were compared on each microarray.
Project description:Expression profiles of microRNAs in neonatal (isolated from day0 newborn rats) and adult rat cardiomyocytes (isolated from 2month old rats) Two condition experiment; Biological replicates: 7 samples of cardiomyocytes from neonatal rats (from independent isolations); 6 samples of cardiomyocytes isolated from adult animals (from independent isolations)
Project description:Analysis of the effect of electrical field stimulation frequency at the gene expression level. Electrical stimulation has been shown to mature nascent cardiomyocytes and alter their beating properties. The purpose of the array was to identify potential mediators of these effects. Total RNA was isolated from cardiomyocytes subjected to 0.5 Hz, 1 Hz, or 2 Hz continuous electrical stimulation for 7 days, compared to an unstimulated control. Three samples from each group were analyzed
Project description:Genome-wide gene expression analysis at different stages of cardiomyocyte differentiation (undifferentiated mouse embryonic stem cells, neonatal mouse cardiomyocytes and adult mouse cardiomyocytes). Results provide important information on the differential expressed genes between undifferentiated mouse embrionic stem cells (mES) and mouse cardiomyocytes (CM) and also between cardiomyocytes from neonatal (CMp) and adult stages (CMa). This dataset allowed us to compare the expression profile of mES, CMp and CMa with the epigenetic profile of histone methylation generated with ChIP-seq experiments. Total RNA was obtained from biological triplicate of undifferentiated mouse embryonic stem cells (mES), neonatal mouse cardiomyocytes (CMp) and adult mouse cardiomyocytes (CMa)
Project description:Study on changes in gene expression in primary cultures of neonatal rat ventricular cardiomyocytes to electric stimulation. Through comparing non-stimulated, stimulated and blebbistatin supplemented and stimulated cultures we set out to identify the genes that are specifically activated by electric pulsing separate from cardiomyocyte contractions. After initial recovery phase, primary cultures of neonatal rat ventricular cardiomyocytes were cultured for 3 days without pulsing, with electric pulsing or with electric pulsing combined with blebbistatin. Per treatment: 3 arrays, with samples obtained from 3 separate series of cardiomyocyte isolation and culturing. Per array: sample prepared from pooled (1:1) RNA from duplicate experiments.
Project description:We addressed the question of which protein kinases are expressed in cardiomyocytes. We assessed the changes during postnatal development, comparing profiles in rat neonatal ventricular cardiomyocytes (NVMs) with adult ventricular cardiomyocytes (AVMs). Neonatal and adult rat ventricular cardiomyocytes prepared according to established procedures (Marshall et al. PLoS ONE 2010 5(4):e10027; Fuller and Sugden, FEBs Lett. 1989 247:209-12; Rodrigues and Severson In Biochemical Techniques in the Heart (McNeill, J. H., Ed.) pp 101-115, CRC Press, New York.). mRNA expression profiles compared using Affymetrix rat genome 230 2.0 arrays.