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Heart regeneration is well docu- cardiomyocytes may be studied either when Arcus DCM-1488E isolated, with mented in sh, amphibian, and developing mammals Ausoni and the limitation that repeated observations cannot be made on the Sartore ; Porrello et Arcus DCM-1488E. After birth, however, human same cell, or in culture without this limitation Diaz and Wilson heart regeneration becomes limited to the very slow cardiomyo- Cell culture offers the additional advantages that targeted cyte replacement.

This could also be the reason why only a few cell manipulation of gene expression can be achieved Arcus DCM-1488E a variety Arcus DCM-1488E lines with a cardiac phenotype exist and tumors of the heart are imaging techniques can be applied Dhein et al. Isolated rare.

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Isolated cardiomyocytes have the advan- is marked by the absence of mitosis and cytokinesis Naqvi et al. It was observed that following stimulation to divide, cell pounds that are toxic to cardiomyocytes Remio et al. Arcus DCM-1488E and multinucleation are observed in adult mammalian ply, and this condition has been widely studied in intact animals. Thus a multilayered tered a new era in which mortality can be approximately halved mechanism to prevent cytokinesis exists in adult mammalian car- by procedures that allow the rapid return of blood ow to the.


Reperfusion, however, may Arcus DCM-1488E to fur- injury Armstrong et al. One of ther complications such as diminished cardiac contractile func- the earliest studies of ischemic preconditioning in isolated cardi- tion stunning and arrhythmia. Moreover, there is experimental omyocytes used human ventricular cardiomyocytes in primary evidence that irreversible cell injury Arcus DCM-1488E to necrosis and apo- culture Ikonomidis et al.

Preconditioning of cardiomyocytes protected the cells from a It should be noted that in other cardiac conditions such as chronic subsequent prolonged period of ischemia and reperfusion Shirai myocardial ischemia, left ventricular hypertrophy, congestive et al. Genetic manipulation is Arcus DCM-1488E tool used to study heart failure, arrhythymias, and atrial brillation, animal cell cul- preconditioning mechanisms as it bypasses the nonspecicity Arcus DCM-1488E ture based models have also been developed Dhein et al.

Cardiomyocytes are isolated from knockout mice in in a sealed ask has been used for studying chronic myocardial which the production of functional copies of a particular protein ischemia Holotnakova et al.

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Simi- have been substantially reduced or eliminated because cell viabil- larly, a model for hypertrophy was developed by treating in vitro ity is considered as the end point Arcus DCM-1488E et al. Another approach is promote hypertrophic responses Watkins et al. Disease to transfect cardiomyocytes in cell culture with a recombinant models for dilated cardiomyopathy, congestive heart failure, and virus that will express one or more mutants of the gene of interest cardiac arrhythmias are being developed and are computationally Horikawa et al.


Arcus DCM-1488E are being directed towards modeled in primary cardiomyocyte cultures, e. In addition to biochemical stimuli, mechanical Arcus DCM-1488E, elec- end effectors. Studies on such areas will increasingly require the trical stimulation, and stiffness, parameters are being worked use of isolated cardiomyocytes. Tracing of signaling pathways in upon primary cardiomyocyte cultures to develop the models for cardiomyocytes can reveal various interactions with multiprotein cardiac diseases van de Stolpe and den Toonder The induced adverse event caused by a number of known chemother- mouse has become the animal of choice because its genome is apeutic agents.

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  • Cardiomyocyte Culture — an Update on the in Vitro Cardiovascular Model and Future Challenges

Cardiotoxicity results in the Arcus DCM-1488E of reactive well characterized and its maintenance cost is relatively low. A oxygen species ROSapoptosis, altered contractibility, change in large animal population can be generated in a short period by cardiac rhythm, and altered cardiac gene expression, which can standardised breeding methods. The production of myocardial be life threatening or may lead to long-term alterations of cardio- ischemia and infarction in small animals by occlusion of coronary vascular functions Deshmukh et al.

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In the pharmaceutical arteries Arcus DCM-1488E vivo was developed in by Heimburger and was industry, the cardiotoxicity test models are based on cell lines, later improved upon by other groups Curtis et al. In animal cardiomyocytes, and models of small or large animalsVander Heide and colleagues developed an in vitro model Braam et al. Food and Drug Administration guidelines on cardiotox- cytes Vander Heide et al. In contrast to in vivo gene hERG channel expressionon a cellular level hERG chan- systems, isolated myocytes possess the inherent advantages of an nel block in native cardiac myocyteson a tissue level repolari- in vitro model system that allows precise control of experimental sation assays on papillary muscle or Purkinje bresor on an conditions and manipulations.

Myocyte preparations are nearly organ level Langendorff heart Deshmukh et al. The more homogenous populations, which allows accurate measurements complex an in vitro system gets, the more parameters can be of metabolic parameters free from the inuence of diffusion prob- monitored and the closer the correlation will be with the in vivo lems or the presence of other cell types in the intact preparations. However, a higher degree of complexity also increases Finally, isolated myocytes provide a model of ischemia in which it costs and decreases the potential for automation, miniaturiza- is uniquely possible to test for cell viability without introducing tion, and high-throughput formats Deshmukh et al.

Primary explant cultures are heterogeneous and often Though a variety of techniques have been used to simulate isch- produce inconsistent results and low reproducibility in toxicity emia in culture, severe hypoxia using nitrogen concentrations testing Astashkina et al. The failure of animal tissue model systems to respond duced the results on cardiomyocyte cell death in whole hearts of a to drugs in a similar manner as human tissue has motivated some wide variety of interventions exploring cellular mechanisms in pharmaceutical companies to use human embryonic stem cells preconditioning Diaz and Wilson However, the simulation ESCs and induced pluripotent stem cells iPSCs derived cardio- of ischemia is more challenging in cell culture, as only a small myocytes for cardiotoxicity testing Braam et al. Cardiomy- fraction of cardiomyocytes from a heart is available on culture ocytes from ESCs and iPSCs are functional in vitro and have plates compared with using the fresh isolate.

This could be a responded to the drugs in a similar manner as fetal cardiomyo- practical limitation for immunoblotting and immunoprecipita- cytes Kong et al.

Lenovo ThinkPad Edge 15Received 25 April 2013. Accepted 8 August 2013.
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Ischemic preconditioning in isolated cardiomyocytes Another bottleneck of current cardiac safety pharmacology is was rst studied by Armstrong and Ganote Armstrong was the lack of healthy adult human ventricular cardiomyocytes able to precondition an in vitro simulated ischemic model either Meyer et al. It is crucial to work with cardiac preparation as by incubation in the absence of glucose or by brief simulated human as possible as the mechanism of repolarisation can differ. Advantages and limitations of using murine species in the animals such as rat and mouse Astashkina et al. Arcus DCM-1488E use of study of cardiovascular disease.

Small size and relatively Small heart size limits regional not be of human origin and sometimes not even mammalian. Rapid gestation period and Species-dependent cardiac Arcus DCM-1488E and development of a new chemical entity NCE or a new biolog- large litter size isoforms expression ical entity NBE as therapeutic agents by providing simple, repro- 3.

Genome extensively Potential species-dependent ducible, and cost-effective tools for toxicity testing of drugs under characterized phenotypic consequences of development and, on the other hand, for studying the disease Can. Cardiomyo- 4. Multiple inbred lines Higher basal heart rate and cytes derived from human ESCs and iPSCs may offer an option to infection susceptibility obtain human cardiomyocytes with a ventricular phenotype following surgical procedures Jonsson et al. Although initial studies 5. Germ line transmission only Lack of functional collaterals and do look promising, the yields of cells obtained from classical dif- possible in this species unique electrophysiology ferentiation methods may not yet meet the demands for higher throughput screening Astashkina et al.

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