Genes & Cells

Healing broken hearts, tracing Romani migration using genes, and how insulin irregularities may be linked to obesity

By Tina Hesman Saey, 12:50 PM December 10, 2012

MicroRNA treatment mends broken hearts
When it comes to the heart, some old cells can become new again, especially with some prodding. Scientists have known that the heart can regenerate some of its cells, but there has been debate about the exact source of the new cells — whether it’s other heart muscle cells, stem cells or even cells from the heart’s outer lining. Researchers at Harvard Medical School and colleagues analyzed the atomic composition of molecules in newly generated mouse hea...

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