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Japanese researchers have transplanted human induced pluripotent stem cells (iPSCs) in a primate model of myocardial infarction and were able to restore heart muscle and function in monkeys. Developed by Tokyo-based Heartseed Inc., the grafted iPSCs consist of clusters of purified heart muscle cells (cardiomyocyte spheroids) that are injected into the myocardial layer of the heart. Published in Circulation on April 26, 2024, the study showed that the cardiomyocyte spheroids survived long term and showed improved contractile function with low occurrence of post-transplant arrhythmias. ....
The laboratory culture of human stem cells seeks to capture a cellular state as an in vitro surrogate of a biological system. For the results and outputs from this research to be accurate, meaningful, and durable, standards that ensure reproducibility and reliability of the data should be applied. Although such standards have been previously proposed for repositories and distribution centers, no widely accepted best practices exist for laboratory research with human pluripotent and tissue stem cells. To fill that void, the International Society for Stem Cell Research has developed a set of recommendations, including reporting criteria, for scientists in basic research laboratories. These criteria are designed to be technically and financially feasible and, when implemented, enhance the reproducibility and rigor of stem cell research. ....
Researchers injected altered human pluripotent stem cells into genetically engineered pig embryos to produce early kidney structures made of both human and pig cells. ....
One of the key advances in regenerative medicine has been the engraftment of external epithelial stem cells to supplement or replace damaged native cells. However, the difficulty in engrafting internal tissues has hindered the long-term rescue of diseased internal epithelia, such as those in the respiratory airways. ....
Induced pluripotent stem cells show great promise for age-related macular degeneration, as revealed by recent research published in the New England Journal of Medicine. ....