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A quantitative three-dimensional bone mineralisation assay using human dental pulp stem cell spheroids

Matrix mineralisation in three-dimensional (3D) human cell culture is still assessed predominantly by terminal histochemical staining. Alizarin Red S and Von Kossa are destructive, semi-quantitative, and require fixation and dye extraction before a number can be obtained, which precludes longitudinal measurement and makes miniaturised multiwell formats impractical. We describe a scaffold-free…

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Fire, smoke and statesmanship

When choking transboundary haze pushed Singapore and Indonesia to the brink of an economic and diplomatic standoff, pragmatic leadership proved that following the money trail—not nationalist…

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