Turning back time: Old stem cells rejuvenate in the presence of younger ones BioTechniques)

The researchers, led by HHMI early career scientist Amy J. Wagers of Harvard Medical School, studied the hematopoietic stem cells in the blood of old mice that had been exposed for several weeks to the blood of young mice. The bone marrow stem cells in the old mice were reduced in number but became more effective at replenishing the blood system, which is characteristic of young stem cells.

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