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. 2016 Jan 25;2:15069. doi: 10.1038/cddiscovery.2015.69

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Copyright © 2016 Cell Death Differentiation Association

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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Early-stage blebbishields are formed by serpentine and box-braid filopodia, whereas in late-stage blebbishields, filopodia are reduced to microvilli. (a1) Scanning electron microscopy of early-stage blebbishields showed two distinct types of apoptotic bodies (AB), one type with endomembranes (EM) and the other with a plasma membranes (PM). (a2–3) Serpentine filopodia (SF) with a filopodial bulb (FB) provided initial contact between apoptotic bodies (AB). (b1–3) Serpentine filopodia (SF) with a filopodial bulb (FB) formed box-braid filopodia (BBF), formed a BBF network (BFN), and tied apoptotic bodies (AB) together to provide mechanical support for blebbishield construction. MV, microvilli. (c1-3) Late-stage blebbishields had fewer or no serpentine or box-braid filopodia but had smaller microvilli (MV).