Fig. 1 Sacrificial writing into functional tissue (SWIFT).

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Presentation transcript:

Fig. 1 Sacrificial writing into functional tissue (SWIFT). Sacrificial writing into functional tissue (SWIFT). (A) Step-by-step illustration of the SWIFT process. (B) (i) Large-scale microwell culture of approximately (ii) 2.5 ml of EB-based OBBs, compacted to form an (iii) OBB tissue matrix composed of approximately half a billion cells. Scale bar, 300 μm (i). Scale bar, is 200 μm (iii). (C) Time-lapse of sacrificial ink (red) writing via embedded 3D printing within an EB matrix observed from beneath the reservoir. (D) Front view of a vertical line of sacrificial ink printed within an EB matrix. Scale bars, 1 mm (C and D). (E) Examples of the SWIFT process for different OBB-based matrices composed of the following: (i) EBs, (ii) cerebral organoids, and (iii) cardiac spheroids. Row 1: Individual OBBs with characteristic markers. Rows 2 and 3: Cross sections [as indicated in (D) by the dashed line] of immunostained slices and bright-field images, respectively, of the OBB types. Scale bars, 50 μm (top row) and 500 μm (middle and bottom rows). (F) Generation of a helical (vascular) feature in an EB matrix via SWIFT: (i) CAD representation of the system and (ii) corresponding image of sacrificial ink writing within an EB matrix, and (iii) image sequence acquired during embedded 3D printing of a sacrificial ink (left), sacrificial ink evacuation upon incubation (middle), and tissue perfusion using media (dyed blue) through the printed helical vascular channels. Mark A. Skylar-Scott et al. Sci Adv 2019;5:eaaw2459 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).