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Reflecting on the opportunities that ‘induced pluripotency’ offers for basic research and clinical translation, the 2015 Focus of The EMBO Journal highlights some of the most challenging biological questions studied using advanced iPSC‐based technologies. 相似文献
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In this video we demonstrate how our lab routinely passages HuES human embryonic stem cell lines with trypsin. Human embryonic stem cells are artifacts of cell culture, and tend to acquire karyotypic abnormalities with high population doublings. Proper passaging is essential for maintaining a healthy, undifferentiated, karyotypically normal HuES human embryonic stem cell culture. First, an expanding culture is washed in PBS to remove residual media and cell debris, then cells are overlaid with a minimal volume of warm 0.05% Trypsin-EDTA. Trypsin is left on the cells for up to five minutes, then cells are gently dislodged with a 2mL serological pipette. The cell suspension is collected and mixed with a large volume of HuES media, then cells are collected by gentle centrifugation. The inactivated trypsin media mixture is removed, and cells resuspended in pre-warmed HuES media. An appropriate split ratio is calculated (generally 1:10 to 1:20), and cells re-plated onto a 1-2 day old plate containing a monolayer of irradiated mouse embryonic fibroblast feeder cells. The newly seeded HuES culture plate is left undisturbed for 48 hrs, then media is changed every day thereafter. It is important not to trpsinize down to a single cell suspension, as this increases the risk of introducing karyotypic abnormalities. 相似文献
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Bruno Boivin Kasper C. D. Roet Xuan Huang Kyle W. Karhohs Mohammad H. Rohban Jack Sandoe Ole Wiskow Rie Maeda Alyssa Grantham Mary K. Dornon Jenny Shao Devlin Frost Dylan Baker Kevin Eggan Anne E. Carpenter Clifford J. Woolf 《Molecular biology of the cell》2022,33(6)
Patient stem cell–derived models enable imaging of complex disease phenotypes and the development of scalable drug discovery platforms. Current preclinical methods for assessing cellular activity do not, however, capture the full intricacies of disease-induced disturbances and instead typically focus on a single parameter, which impairs both the understanding of disease and the discovery of effective therapeutics. Here, we describe a cloud-based image processing and analysis platform that captures the intricate activity profile revealed by GCaMP fluorescence recordings of intracellular calcium changes and enables the discovery of molecules that correct 153 parameters that define the amyotrophic lateral sclerosis motor neuron disease phenotype. In a high-throughput screen, we identified compounds that revert the multiparametric disease profile to that found in healthy cells, a novel and robust measure of therapeutic potential quite distinct from unidimensional screening. This platform can guide the development of therapeutics that counteract the multifaceted pathological features of diseased cellular activity. 相似文献