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Cell-Derived Therapy May Help Repair Abnormal Heart Rhythm Ventricular tachycardia, revealed in this printout of a electrocardiogram, is a type of abnormal heart rhythm, or arrhythmia, that occurs when the heart's lower chambers beat too fast. Photo by Getty.
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Victoria Lopez Member
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Emergency Cardiology and Intensive Care. Tape ECG with paroxysmal ventricular tachycardia
Cedars-Sinai Investigators Found It Also Reduced Scarred Heart Tissue in Animals Vesicles secreted from human heart cells may repair damaged tissue and prevent lethal heart rhythm disorders, according to a new study from investigators in the Smidt Heart Institute at Cedars-Sinai.
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Scarlett Brown 6 minutes ago
The research, published in the European Heart Journal, could lead to a new way to treat a heart rhyt...
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Andrew Wilson 2 minutes ago
Current treatment options for ventricular arrhythmias caused by heart attacks are far from ideal. ...
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Ryan Garcia Member
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The research, published in the European Heart Journal, could lead to a new way to treat a heart rhythm problem called ventricular arrhythmia—a top cause of sudden cardiac death. In an accompanying editorial, experts describe the research as “poised to turn this entire field on its head.”
Repairing a Damaged Heart 
Ventricular arrhythmias can occur after a heart attack damages tissue, causing chaotic electrical patterns in the heart’s lower chambers. The heart ends up beating so rapidly that it cannot support the circulation, leading to a lack of blood flow and, if untreated, death.
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Charlotte Lee 2 minutes ago
Current treatment options for ventricular arrhythmias caused by heart attacks are far from ideal. ...
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Liam Wilson 2 minutes ago
Recurrence rates are, unfortunately, high for all of these. “Ablation is a counterintuitive approa...
Current treatment options for ventricular arrhythmias caused by heart attacks are far from ideal. These include medications with major side effects, implanted devices to provide an internal shock, and a procedure called radiofrequency ablation in which parts of the heart are purposely destroyed to interrupt disruptive electrical signals.
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Evelyn Zhang 3 minutes ago
Recurrence rates are, unfortunately, high for all of these. “Ablation is a counterintuitive approa...
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Alexander Wang 1 minutes ago
“We asked ourselves, ‘What if instead of destroying damaged tissue, we tried to repair it?’”...
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Charlotte Lee Member
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Recurrence rates are, unfortunately, high for all of these. “Ablation is a counterintuitive approach because you are destroying heart muscle in an already weakened heart,” said Eugenio Cingolani, MD, director of the Cardiogenetics-Familial Arrhythmia Program at the Smidt Heart Institute at Cedars-Sinai, and senior author of the study.
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Kevin Wang Member
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“We asked ourselves, ‘What if instead of destroying damaged tissue, we tried to repair it?’”
With that in mind, the team sought to try a different approach in laboratory pigs that experienced a heart attack. They injected some of the laboratory pigs with tiny, balloon-like vesicles, called exosomes, produced by cardiosphere-derived cells (CDCs), which are progenitor cells derived from human heart tissue.
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James Smith 4 minutes ago
Exosomes are hardy particles containing molecules and the molecular instructions to make various pro...
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Charlotte Lee Member
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Exosomes are hardy particles containing molecules and the molecular instructions to make various proteins, thus they are easier to handle and transfer than the parent cells, or CDCs. CDCs were first developed and characterized by Eduardo Marbán, MD, PhD, executive director of the Smidt Heart Institute at Cedars-Sinai and the Mark S.
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Noah Davis 2 minutes ago
Siegel Family Foundation Distinguished Professor. They have been used in multiple clinical trials fo...
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Alexander Wang 2 minutes ago
Marbán, who is a co-author on the study. The animals were evaluated by MRI and tests to assess elec...
Siegel Family Foundation Distinguished Professor. They have been used in multiple clinical trials for a variety of diseases, most recently Duchenne muscular dystrophy.
One group of pigs received an injection of CDC-derived exosomes in their hearts and the other a placebo. “The exosomes reduced the amount of scar tissue formed in the injured regions of the heart, normalizing the rhythm without weakening the heart,” said Dr.
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Audrey Mueller 36 minutes ago
Marbán, who is a co-author on the study. The animals were evaluated by MRI and tests to assess elec...
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Lucas Martinez 6 minutes ago
A Novel Therapy 
In an editorial published in the same issue of the European Heart Journal,...
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Kevin Wang Member
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Marbán, who is a co-author on the study. The animals were evaluated by MRI and tests to assess electrical stability of the heart. Four to six weeks after injection, the laboratory pigs that had received the exosome therapy showed markedly improved heart rhythms and less scarring in their hearts.
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Victoria Lopez 2 minutes ago
A Novel Therapy 
In an editorial published in the same issue of the European Heart Journal,...
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Ella Rodriguez 1 minutes ago
The authors note the approach used by Cedars-Sinai is novel in how it seeks to repair scarring in th...
A Novel Therapy 
In an editorial published in the same issue of the European Heart Journal, Marine Cacheux, PhD, and Fadi G. Akar, PhD, both of Yale University, summarize the pros and cons of various experimental gene- and cell-based approaches being studied for cardiac arrhythmias. Cedars-Sinai investigators “appear to have successfully combined the best features of cell and gene therapies to address a major unmet clinical need,” according to Cacheux and Akar.
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Emma Wilson 3 minutes ago
The authors note the approach used by Cedars-Sinai is novel in how it seeks to repair scarring in th...
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The authors note the approach used by Cedars-Sinai is novel in how it seeks to repair scarring in the heart, and describe the study as “a paradigm-shifting body of work.”
The investigators plan additional studies. “More studies are needed to to know if the benefits observed in this study persist over a longer period of time,” said James F.
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Dawkins, DVM, a research scientist at Cedars-Sinai and first author of the study, “however, these ...
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Dawkins, DVM, a research scientist at Cedars-Sinai and first author of the study, “however, these preliminary results suggest the possibility for a nondestructive alternative to treating ventricular arrhythmias.”
Funding: This study was funded by the National Institutes of Health under award numbers 1K01HL133510-01A1, R01HL135866 and R01HL14750. Read more on the Cedars-Sinai Blog: Is It a Heart Attack or Panic Attack?
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