Abstract:
:Pluripotent stem cell-derived cardiomyocyte grafts can remuscularize substantial amounts of infarcted myocardium and beat in synchrony with the heart, but in some settings cause ventricular arrhythmias. It is unknown whether human cardiomyocytes can restore cardiac function in a physiologically relevant large animal model. Here we show that transplantation of ∼750 million cryopreserved human embryonic stem cell-derived cardiomyocytes (hESC-CMs) enhances cardiac function in macaque monkeys with large myocardial infarctions. One month after hESC-CM transplantation, global left ventricular ejection fraction improved 10.6 ± 0.9% vs. 2.5 ± 0.8% in controls, and by 3 months there was an additional 12.4% improvement in treated vs. a 3.5% decline in controls. Grafts averaged 11.6% of infarct size, formed electromechanical junctions with the host heart, and by 3 months contained ∼99% ventricular myocytes. A subset of animals experienced graft-associated ventricular arrhythmias, shown by electrical mapping to originate from a point-source acting as an ectopic pacemaker. Our data demonstrate that remuscularization of the infarcted macaque heart with human myocardium provides durable improvement in left ventricular function.
journal_name
Nat Biotechnoljournal_title
Nature biotechnologyauthors
Liu YW,Chen B,Yang X,Fugate JA,Kalucki FA,Futakuchi-Tsuchida A,Couture L,Vogel KW,Astley CA,Baldessari A,Ogle J,Don CW,Steinberg ZL,Seslar SP,Tuck SA,Tsuchida H,Naumova AV,Dupras SK,Lyu MS,Lee J,Hailey DW,Reinecdoi
10.1038/nbt.4162subject
Has Abstractpub_date
2018-08-01 00:00:00pages
597-605issue
7eissn
1087-0156issn
1546-1696pii
nbt.4162journal_volume
36pub_type
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