Keio University · Medicine
Professor Shinsuke Yuasa's research lab specializes in regenerative medicine and stem cell biology, with a focus on induced pluripotent stem cells (iPSCs) and their applications in disease modeling, drug screening, and personalized medicine. The lab investigates cardiac and skeletal muscle development, emphasizing the role of key transcriptional regulators like Zac1 in cardiogenesis and congenital heart disease. Using advanced technologies such as deep learning and single-cell analysis, the lab develops innovative, staining-free methods to identify and characterize stem cell-derived cell types, including endothelial cells. The lab also explores epigenetic mechanisms—particularly oocyte-specific factors like H1foo—that enhance iPSC reprogramming and improve the quality and functionality of pluripotent stem cells.
Figures are computed from collected data and may differ slightly.
This study demonstrated that iPSCs could be useful to characterize LQTS disease as well as drug responses in the LQTS patient with a novel mutation. Such analyses may in turn lead to future progress in personalized medicine.
Skeletal muscle comprises 30-40% of the weight of a healthy human body and is required for voluntary movements in humans. Mature skeletal muscle is formed by multinuclear cells, which are called myofibers. Formation of myofibers depends on the proliferation, differentiation, and fusion of muscle progenitor cells during development and after injury. Muscle progenitor cells are derived from muscle satellite (stem) cells (MuSCs), which reside on the surface of the myofiber but beneath the basement
Deep learning technology is rapidly advancing and is now used to solve complex problems. Here, we used deep learning in convolutional neural networks to establish an automated method to identify endothelial cells derived from induced pluripotent stem cells (iPSCs), without the need for immunostaining or lineage tracing. Networks were trained to predict whether phase-contrast images contain endothelial cells based on morphology only. Predictions were validated by comparison to immunofluorescence
Zac1 plays an essential role in the cardiac gene regulatory network. Our data provide a potential mechanistic link between Zac1 in cardiogenesis and congenital heart disease manifestations associated with genetic or epigenetic defects in an imprinted gene network.
Embryonic stem cells (ESCs) are a hallmark of ideal pluripotent stem cells. Epigenetic reprogramming of induced pluripotent stem cells (iPSCs) has not been fully accomplished. iPSC generation is similar to somatic cell nuclear transfer (SCNT) in oocytes, and this procedure can be used to generate ESCs (SCNT-ESCs), which suggests the contribution of oocyte-specific constituents. Here, we show that the mammalian oocyte-specific linker histone H1foo has beneficial effects on iPSC generation. Induct
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