Detection and classification of dendritic spines in transfected hippocampal neurons. Detection and classification of dendritic spines in transfected hippocampal.

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Detection and classification of dendritic spines in transfected hippocampal neurons. Detection and classification of dendritic spines in transfected hippocampal neurons. (A) Neurons were co-transfected with the indicated constructs together with mCherry, fixed 5 days later and images of mCherry fluorescence were acquired by confocal microscopy. The figure shows maximal intensity projections of confocal image stacks. Control: empty pcDNA3 vector. The boxed regions in a–d (scale bar: 20 μm) were scanned at higher magnification in a1–d1 (scale bar: 5 μm). (B) Stacks of optical slices acquired in A served to generate 3D models of the dendrite, using the surface-defining Ray Burst algorithm implemented in NeuronStudio (Rodriguez et al., 2006). The dimensions of the modelled structures were automatically measured as described previously (Rodriguez et al., 2006) and used to identify and classify spines. Left: surface rendering of a segment from the dendrite shown in b1. Middle: maximal intensity projection of optical sections from the same segment. Right: automated spine detection and classification. Appropriately coloured dots are superimposed onto the spines. Yellow (t): thin spines; red (m): mushroom spines; blue (s): stubby spines. Agnès Belly et al. J Cell Sci 2010;123:2943-2954 © 2010.