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Definitions for adult stem cells debated p.328

Adult tissues must maintain themselves and regenerate after damage. But are these crucial functions mediated by dedicated populations of stem cells, or do differentiated cells adopt stem-cell-like properties according to an organ’s needs? Here, two scientists present evidence from both sides of the debate.

doi: 10.1038/d41586-018-07175-6

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Gut microbes alter the walking activity of fruit flies p.331

A gut bacterium has been found to modulate locomotor activity in the fruit fly Drosophila melanogaster. This effect is mediated by the level of a sugar and the activity of neurons that produce the molecule octopamine.

doi: 10.1038/d41586-018-07080-y

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