A drug that reverses osteoporosis in mice looks like a promising candidate for treating the human version of the disease. Gerard Karsenty and his colleagues at Columbia University Medical Center have shown that blocking the neurotransmitter serotonin--secreted from the gut--promotes bone growth. The research appears on-line at www.nature.com/naturemedicine - Yadav et al. Nature Medicine, 7 February 2010. DOI: 10.1038/nm.2098
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