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Credit: Salk Institute LA JOLLA (April 15, 2021) The ability to grow the cells of one species within an organism of a different species offers scientists a powerful tool for research and medicine. It s an approach that could advance our understanding of early human development, disease onset and progression and aging; provide innovative platforms for drug evaluation; and address the critical need for transplantable organs. Yet developing such capabilities has been a formidable challenge. Researchers led by Salk Professor Juan Carlos Izpisua Belmonte have now come one step closer toward this goal by demonstrating a new integration of human cells into animal tissue. Published in the journal ....