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Myocytes, Cardiac

Cardiac myocytes, also known as cardiomyocytes, are the muscle cells that make up the heart.
These highly specialized cells are responsible for the pumping action of the heart, allowing it to contract and relax in a coordinated manner to circulate blood throughout the body.
Cardiac myocytes are striated, meaning they have a banded appearance under the microscope, and they contain a single, centrally located nucleus.
They are electrically excitable, responding to electrical signals that trigger the contraction of the heart muscle.
Understanding the biology and function of cardiac myocytes is essential for the study of cardiac physiology, development, and disease, as well as the development of therapies for cardiovascular conditions.
Researches on cardiac myocytes often utilize advanced techniques, such as cell culture, electrophysiology, and genetic manipulation, to gain insights into their structure, metabolism, and role in heart function and disease.

Most cited protocols related to «Myocytes, Cardiac»

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Publication 2011
Adult Contracture Digestion Enzymes isolation Muscle Cells Muscle Contraction Myocytes, Cardiac Physical Examination Primary Cell Culture Sarcoplasmic Reticulum Stimulations, Electric Therapies, Investigational Trypan Blue
Chamber-specific ablation and reporter lines were generated using the standard I-SceI meganuclease transgenesis technique (details in Methods). To perform ventricular cardiomyocyte ablation, Tg(vmhc:mCherry-NTR) zebrafish were treated with 5 mM MTZ as previously described9 (link). For lineage tracing experiments, Tg(vmhc:mCherry-NTR;amhc:CreERT2;β-act2:RSG) zebrafish were treated with 10 µM 4-hydroxytamoxifen as previously described5 (link). For Notch inhibition studies, zebrafish were treated with 100 µM DAPT. Live imaging, heart contraction, immunofluorescence, and whole mount in situ hybridization were performed as described in Methods.
Publication 2013
1,2-dilinolenoyl-3-(4-aminobutyryl)propane-1,2,3-triol CCL4 protein, human Fluorescent Antibody Technique Heart Ventricle hydroxytamoxifen In Situ Hybridization Myocardial Contraction Myocytes, Cardiac Psychological Inhibition Zebrafish
All experimental procedures with animals were approved by the Institutional Animal Care and Use Committee at UT Southwestern Medical Center.
Adult TTFs and CFs were isolated by an explanting method in which fibroblasts migrate from minced tissue and grow in fibroblast growth medium. Fibroblasts were transduced with a mixture of polybrene (Sigma; 6μg/ml) and freshly made retroviruses expressing transcription factors generated in Platinum E cells (Cell Biolabs). Twenty-four hours after viral transduction, the viral medium was changed to a cardiac induction medium. Medium was changed every two days. Expression of cardiac genes was analyzed by flow cytometry, microarray, and immunocytochemistry.
Adult mice, 8–10 weeks old, underwent either a sham operation or ligation of the LAD. Concentrated retroviruses (~108~9 pfu viruses) were injected into the border zone using a gastight 1710 syringe (Hamilton). Cardiac function was assessed using echocardiography and MRI. Hearts were harvested from euthanized animals for histological studies.
Isolation of cardiomyocytes, electrophysiological measurements, histology and immunohistochemistry were performed as described previously2 (link), 33 (link)–37 (link).
Publication 2012
Adult Animals Animals, Laboratory Cells Echocardiography Fibroblasts Flow Cytometry Gene Expression Heart Immunocytochemistry Immunohistochemistry Institutional Animal Care and Use Committees isolation Ligation Microarray Analysis Mus Myocytes, Cardiac Platinum Polybrene Retroviridae Syringes Tissues Transcription Factor Virus
All barcodes labelled in the global object as cardiomyocytes, fibroblasts and neural cells were selected for further subpopulation analyses. Additional cell population-specific filtering criteria were applied to nuclei as follows: cardiomyocyte counts (n_counts <12,500), genes (n_genes <4,000), mitochondrial genes (percent_mito <1%), ribosomal genes (percent_ribo <1%) and scrublet score (scrublet_score <0.25); FB mitochondrial genes (percent_mito <1%), ribosomal genes (percent_ribo <1%); neuronal cell genes (n_genes <4000), mitochondrial genes (percent_mito <1%), ribosomal genes (percent_ribo <1%). Total and CD45+ cells were excluded in the atrial and ventricular cardiomyocytes datasets and did not contribute to subpopulation analysis. No further filtering of FBs or neuronal cell total and CD45+ cells was applied. Cardiomyocytes and FBs were then further split into two groupings based on the region of origin: (1) left and right atrium, and (2) left and right ventricles, apex and interventricular septum.
Donor effects were aligned as described in step (1) above. For FB and neuronal cells, sources were aligned as described in step (3) above. Leiden clustering and UMAP visualization were performed for identifying subpopulations and visualization86 (link). Differentially expressed genes were calculated using the Wilcoxon rank sum test. Genes were ranked by score.
Publication 2020
Atrium, Right Cell Nucleus Cells Fibroblasts Genes Genes, Mitochondrial Heart Atrium Heart Ventricle Mitomycin Myocytes, Cardiac Neurons Population Group Reproduction Ribosomes Strains Tissue Donors Ventricles, Right Ventricular Septum
To assign fiber orientation throughout the myocardium according to the rules R1–R6 above, the LDRB algorithm takes four functions as inputs, representing the desired α and β angles within the septum (s) and the ventricular walls (w). The angles α and β are in degrees and d is the transmural depth normalized from 0 to 1.
αs(d)=αendo(1d)αendod
αw(d)=αendo(1d)+αepid
βs(d)=βendo(1d)+βendod
βw(d)=βendo(1d)+βepid
If non-linear interpolation functions are desired, these functions need to satisfy αw(0) = αs(0) = −αs(1) modulo 180° and βw(0) = βs(0) = −βs(1) modulo 180°. These conditions ensure that the coordinate systems used for assigning fiber orientation on the endocardium of Ω will be appropriately oriented, regardless of whether orientations are parametrized in the LV or RV wall.
The LDRB algorithm also requires the definition of the following surfaces in order to assign Dirichlet boundary conditions:

∂Ωapex: the apex of the ventricles

∂Ωbase: the base of the ventricles

∂Ωepi: the epicardial surface of the ventricles

∂Ωlv: the endocardial surface of the LV

∂Ωrv: the endocardial surface of the RV

For most studies, the surface ∂Ωbase can be extracted by taking a cutting plane at the apicobasal junction, and the surface ∂Ωapex can be extracted by finding the point lying closest to the ventricular apex of Ω. The surfaces ∂Ωepi, ∂Ωlv, and ∂Ωrv can then be extracted by choosing an arbitrary point on the epicardium, LV endocardium, and RV endocardium, then iteratively expanding from these three points along the surface of Ω until intersection with ∂Ωbase.
Publication 2012
Endocardium Epicardium Fibrosis Heart Ventricle Mental Orientation Myocytes, Cardiac

Most recents protocols related to «Myocytes, Cardiac»

The cellular uptake of Cy5.5-CNPs was investigated in three types of normal cells, such as breast cancer cells (4T1), rat cardiomyocytes (H9C2), mouse fibroblasts (L929) and macrophages (Raw264.7). Each cell was incubated with Cy5.5-CNPs (100, 225 or 900 μg/ml) for 4 or 24 h. After treatment, cells were fixed with 4% paraformaldehyde for 15 min, and stained with 4′,6-diamidino-2-phenylindole (DAPI) for 10 min. The cellular uptake was observed using a Leica TCS SP8 confocal laser-scanning microscope (CLSM; Leica Microsystems GmbH; Wetzlar, Germany). Quantitative analyses of the fluorescence images were performed using ImageJ software (NIH, Bethesda, MD, USA). The cytotoxicity was assessed by the Cell Counting Kit-8 (CCK-8) assay. Briefly, 5 × 104 4T1, H9C2, L929 and Raw264.7 cells were seeded into 96-well cell culture plates. Then, each cell was treated with different concentration of Cy5.5-CNPs ranging from 0 to 900 μg/ml. After 24 h of incubation, the cells were further incubated with cell culture medium containing 10% of CCK-8 solution for 20 min. Finally, the cell viability was analyzed using a microplate reader (VERSAmaxTM; Molecular Devices Corp., USA) with a wavelength of 450 nm.
Publication 2023
Biological Assay Breast Carcinoma Cell Culture Techniques Cells Cell Survival Culture Media CY5.5 cyanine dye Cytotoxin Fibroblasts Fluorescence Macrophage Medical Devices Microscopy, Confocal Mus Myocytes, Cardiac paraform RAW 264.7 Cells
Glycol chitosan (Mw = 250 kDa, 5β-cholanic acid, 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) were purchased from Sigma Aldrich (St. Louis, MO, USA). Flamma 648 NHS ester was purchased from BioActs (Incheon, Republic of Korea). Cell counting kit-8 (CCK-8) was purchased from Vitascientific (Beltsville, MD, USA). Tem grid (Carbon Film 200 Mesh copper) was purchased from Electron Microscopy Sciences (Hatfield, PA, USA). H9C2 (Rat cardiomyocyte), L929 (mouse fibroblast) and Raw264.7 (macrophage) cell lines were purchased from American Type Culture Collection (ATCC; Manassas, VA, USA). Fetal bovine serum (FBS), streptomycin, penicillin and RPMI 1640 medium were purchased from WELGENE Inc. (Daegu, Republic of Korea). Antibodies against mouse TNF-α (cat# 109,828), mouse IL1b, mouse IL6 and mouse β-actin were purchased from BioLegend (San Diego, CA, USA).
Publication 2023
Actins Antibodies Carbodiimides Carbon Cell Lines cholanic acid Copper Electron Microscopy Esters Fetal Bovine Serum Fibroblasts glycol-chitosan Interleukin-1 Macrophage Mus Myocytes, Cardiac N-hydroxysuccinimide Penicillins Streptomycin Tumor Necrosis Factor-alpha
IPSc-derived cardiomyocytes were cultured on glass slides coated with Synthemax II-SC (Corning) in RPMI-1640/B-27 with Y27632 (5 μM) media for 2 days. Cells were fixed with 4% formaldehyde for 15 min at room temperature. Fixed cells were blocked in antibody buffer (5% BSA, 0.1% Tween-20 in PBS) for 1 h at room temperature. Following blocking, cells were incubated overnight at 4 °C with cardiac troponin-T antibody (abcam, ab45932, 1:200), α-Actinin antibody (Sigma, A7811, 1:800), and/or Connexin 43 (Cell Signaling Technology, 1:100) in antibody buffer. After the overnight incubation, cells were washed three times in antibody buffer. Following washing, cells were incubated with Alexa-Fluor conjugated secondary antibodies (Thermo Fisher Scientific, Alexa 488 Donkey anti-Rabbit IgG and Alexa 594 Goat anti-Ms IgG1) at a 1:1,000 dilution in antibody buffer for 1 h at room temperature. Nuclei were stained by DAPI at 1 μg/ml and Wheat Germ Agglutinin (Thermo Fisher Scientific, W21404) was used to stain cell membrane for 10 min at room temperature in antibody buffer. Following washing in PBS to remove unbound complexes, sarcomeres were analyzed using a Zeiss LSM510 confocal microscope. Images were processed with Zeiss software (Axiovision Rel4.8 and Zen Blue). Circularity measurements were made by comparing cardiomyocyte length to width and were expressed as a circularity index whereby circularity index = width/length15 (link). Sarcomere distance measurements were made with ImageJ15 (link). All measurements were made with a double-blinding method.
Publication 2023
Actinin Alexa594 anti-IgG Antibodies Buffers Cardiac Arrest Cell Nucleus DAPI Equus asinus Formaldehyde GJA1 protein, human Goat Heart IgG1 Immunoglobulins Induced Pluripotent Stem Cells Microscopy, Confocal Myocytes, Cardiac Plasma Membrane Rabbits Sarcomeres Stains Technique, Dilution Troponin T Tween 20 Wheat Germ Agglutinins Y 27632
IPSc-derived cardiomyocytes were cultured on glass slides coated with BG iMatrix-511 (Biogems, 0.5 μg/cm2) in RPMI-1640/B-27 with Y27632 (5 μM) media for 2 days. The microelectrodes (Sutter Instruments, BF150-110-10) were made via a micropipette puller (Sutter Instrument, P-87) to create electrodes at ~ 3 MΩ in Tyrode's solution (140 mM NaC1, 5.4 mM KCl, 1.8 mM CaCl2, 1.05 mM MgCl2, 0.33 mM NaH2PO4, 5 mM HEPES and 10 mM glucose; pH was adjusted to 7.4 with NaOH). Current-clamp mode was used to record action potential via an Axopatch 200B amplifier running software Calmpex 8.2.
Publication 2023
Action Potentials Glucose HEPES Induced Pluripotent Stem Cells Magnesium Chloride Microelectrodes Myocytes, Cardiac Tyrode's solution Y 27632
iPSc-derived cardiomyocytes were removed from the tissue culture plate with Trypsin–EDTA (Thermo Fisher Scientific, 0.25%) and fixed in a solution containing 1% formaldehyde (Thermo Fisher Scientific) and 90% methanol (Sigma). Fixed cells were incubated with antibodies for cardiac troponin-T (Thermo Fisher Scientific, MA5-12,960, 1:200) or MLC2v-PE (Mitenyi Biotec, 130–119-581, 1:50) in FACS buffer (PBS with 0.5% BSA) for 45 min at room temperature. Where necessary, primary antibodies were removed and the cells incubated with an Alexa 488 Goat anti-Ms IgG1 (Thermo Fisher Scientific, A-21121, 1:1,000) in FACS buffer for an additional 30 min at room temperature. Cells were washed three times in FACS buffer and analyzed on a BD Sciences FACSCantoII. Compensation was performed by FlowJo. Singlets were analyzed via gating on the FSC-H and FSC-L channels.
Publication 2023
Antibodies Buffers Cells Edetic Acid Formaldehyde Goat Heart IgG1 Induced Pluripotent Stem Cells Methanol Myocytes, Cardiac Tissues Troponin T Trypsin

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More about "Myocytes, Cardiac"

Cardiomyocytes, also known as cardiac muscle cells or myocytes, are the specialized cells that make up the heart's muscular tissue.
These highly intricate cells are responsible for the heart's pumping action, allowing it to contract and relax in a coordinated manner to circulate blood throughout the body.
Cardiomyocytes have a striated, banded appearance under the microscope and contain a single, centrally located nucleus.
They are electrically excitable, responding to electrical signals that trigger the contraction of the heart muscle.
Understanding the biology and function of cardiomyocytes is essential for the study of cardiac physiology, development, and disease, as well as the development of therapies for cardiovascular conditions.
Researchers often utilize advanced techniques, such as cell culture, electrophysiology, and genetic manipulation, to gain insights into the structure, metabolism, and role of cardiomyocytes in heart function and disease.
Techniques like FBS (fetal bovine serum), DMEM (Dulbecco's Modified Eagle Medium), Lipofectamine 2000, Penicillin/Streptomycin, TRIzol reagent, Collagenase type II, and In Situ Cell Death Detection Kit are commonly used in cardiomyocyte research to support cell growth, transfection, and analysis.
Additionally, Penicillin and Streptomycin are commonly used antibiotics to prevent bacterial contamination, while Trypsin is employed for cell detachment and passaging.
By leveraging these advanced tools and techniques, researchers can optimize their myocyte and cardiac studies, enhance reproducibility and accuracy, and drive progress in the understanding and treatment of cardiovascular conditions.