Volume 5, Issue 4, Pages (October 2015)

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Volume 5, Issue 4, Pages 609-620 (October 2015) Computational Image Analysis Reveals Intrinsic Multigenerational Differences between Anterior and Posterior Cerebral Cortex Neural Progenitor Cells  Mark R. Winter, Mo Liu, David Monteleone, Justin Melunis, Uri Hershberg, Susan K. Goderie, Sally Temple, Andrew R. Cohen  Stem Cell Reports  Volume 5, Issue 4, Pages 609-620 (October 2015) DOI: 10.1016/j.stemcr.2015.08.002 Copyright © 2015 The Authors Terms and Conditions

Stem Cell Reports 2015 5, 609-620DOI: (10.1016/j.stemcr.2015.08.002) Copyright © 2015 The Authors Terms and Conditions

Figure 1 Overview of Approach Starting with an initial segmentation, cells are tracked through the image data and a lineage is obtained. The parent-daughter relationships in the lineage are validated by the human observer. The validated lineage is then used to refine the segmentation and tracking under supervision. This refine and then validate process is repeated for each image, achieving a significant reduction in the segmentation error rate. Stem Cell Reports 2015 5, 609-620DOI: (10.1016/j.stemcr.2015.08.002) Copyright © 2015 The Authors Terms and Conditions

Figure 2 Lineage Trees for the 78 Clones of Posterior Progenitor Cells and 82 Clones of Anterior Progenitor Cells Analyzed Here Note the differences in lineage tree shape within and between regions. Stem Cell Reports 2015 5, 609-620DOI: (10.1016/j.stemcr.2015.08.002) Copyright © 2015 The Authors Terms and Conditions

Figure 3 All of the Images Together with the Results Can Be Browsed from an Easy to Use Web Application Called CloneView CloneView lists summary information for each clone (left) and allows the images to be explored, with segmentation and tracking optionally overlaid (right), CloneView: http://n2t.net/ark:/87918/d91591. Stem Cell Reports 2015 5, 609-620DOI: (10.1016/j.stemcr.2015.08.002) Copyright © 2015 The Authors Terms and Conditions

Figure 4 Resegmentation Using a Known Number of Cells Segmentation examples (top and bottom) starting from initial segmentations that incorrectly identify the number of cells (A and E). We use the lineage tree to correctly establish the number of cells, improving over traditional methods such as the watershed transform (B and F). Partitioning of the pixels into cells (C and G) is improved by using an elliptical shape model (D and H). The scale bars represent 10 μm, CloneView top: http://n2t.net/ark:/87918/d91591?3 and bottom: http://n2t.net/ark:/87918/d91591?4. Stem Cell Reports 2015 5, 609-620DOI: (10.1016/j.stemcr.2015.08.002) Copyright © 2015 The Authors Terms and Conditions

Figure 5 Lineage Information Resolves Visual Ambiguities The segmentations marked with red arrows (gray outlines) are cell processes, not cells. These structures persist for over 20 frames and are indistinguishable from actual segmentations in isolated frames. The lineage tree (right) shows that there are 21 cells (colored outlines) in the current frame, allowing the correct segmentations to be automatically identified. The scale bars represent 20 μm, CloneView: http://n2t.net/ark:/87918/d91591?5. Stem Cell Reports 2015 5, 609-620DOI: (10.1016/j.stemcr.2015.08.002) Copyright © 2015 The Authors Terms and Conditions

Figure 6 Differences in Characteristics and Behavior of Anterior versus Posterior Cerebral Cortex Progenitor Cells Plots comparing all cells (left) and separating cells by generation (right) are shown for total posterior (P) cells (red), total anterior (A) cells (blue), fast dividing anterior (FD) cells (green), and slow dividing (SD) anterior cells (purple). The whiskers represent the 95% CI. Stem Cell Reports 2015 5, 609-620DOI: (10.1016/j.stemcr.2015.08.002) Copyright © 2015 The Authors Terms and Conditions

Figure 7 Immunohistochemistry Used to Display Fate Commitment by Generation on the Lineage Tree Stain images for β-Tubulin (red, neuron) (A) and Nestin (cyan, neural progenitor cell, NPC, B). The final frame of live-cell time-lapse sequence (C) with segmentation and tracking overlaid and stain results blended. The cell fate commitment is shown on the lineage tree colored by the generation (in parenthesis) when all offspring take on the same fate. Stem Cell Reports 2015 5, 609-620DOI: (10.1016/j.stemcr.2015.08.002) Copyright © 2015 The Authors Terms and Conditions