@article{SunStarlyDalyetal.2020,
  author    = {Sun, Wei and Starly, Binil and Daly, Andrew C and Burdick, Jason A and Groll, J{\"u}rgen and Skeldon, Gregor and Shu, Wenmiao and Sakai, Yasuyuki and Shinohara, Marie and Nishikawa, Masaki and Jang, Jinah and Cho, Dong-Woo and Nie, Minghao and Takeuchi, Shoji and Ostrovidov, Serge and Khademhosseini, Ali and Kamm, Roger D and Mironov, Vladimir and Moroni, Lorenzo and Ozbolat, Ibrahim T},
  title     = {The bioprinting roadmap},
  series = {Biofabrication},
  volume    = {12},
  journal   = {Biofabrication},
  number    = {2},
  doi       = {10.1088/1758-5090/ab5158},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-254027},
  year      = {2020},
  abstract  = {This bioprinting roadmap features salient advances in selected applications of the technique and highlights the status of current developments and challenges, as well as envisioned advances in science and technology, to address the challenges to the young and evolving technique. The topics covered in this roadmap encompass the broad spectrum of bioprinting; from cell expansion and novel bioink development to cell/stem cell printing, from organoid-based tissue organization to bioprinting of human-scale tissue structures, and from building cell/tissue/organ-on-a-chip to biomanufacturing of multicellular engineered living systems. The emerging application of printing-in-space and an overview of bioprinting technologies are also included in this roadmap. Due to the rapid pace of methodological advancements in bioprinting techniques and wide-ranging applications, the direction in which the field should advance is not immediately clear. This bioprinting roadmap addresses this unmet need by providing a comprehensive summary and recommendations useful to experienced researchers and newcomers to the field.},
  language  = {en}
}
@article{LotzKiesewetterSchmidetal.2018,
  author    = {Lotz, C. and Kiesewetter, L. and Schmid, F. F. and Hansmann, J. and Walles, H. and Groeber-Becker, F.},
  title     = {Replacing the Draize eye test: impedance spectroscopy as a 3R method to discriminate between all GHS categories for eye irritation},
  series = {Scientific Reports},
  volume    = {8},
  journal   = {Scientific Reports},
  number    = {15049},
  doi       = {10.1038/s41598-018-33118-2},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-177492},
  year      = {2018},
  abstract  = {Highly invasive animal based test procedures for risk assessment such as the Draize eye test are under increasing criticism due to poor transferability for the human organism and animal-welfare concerns. However, besides all efforts, the Draize eye test is still not completely replaced by alternative animal-free methods. To develop an in vitro test to identify all categories of eye irritation, we combined organotypic cornea models based on primary human cells with an electrical readout system that measures the impedance of the test models. First, we showed that employing a primary human cornea epithelial cell based model is advantageous in native marker expression to the primary human epidermal keratinocytes derived models. Secondly, by employing a non-destructive measuring system based on impedance spectroscopy, we could increase the sensitivity of the test system. Thereby, all globally harmonized systems categories of eye irritation could be identified by repeated measurements over a period of 7 days. Based on a novel prediction model we achieved an accuracy of 78\% with a reproducibility of 88.9\% to determine all three categories of eye irritation in one single test. This could pave the way according to the 3R principle to replace the Draize eye test.},
  language  = {en}
}
@article{KressBaurOttoetal.2018,
  author    = {Kress, Sebastian and Baur, Johannes and Otto, Christoph and Burkard, Natalie and Braspenning, Joris and Walles, Heike and Nickel, Joachim and Metzger, Marco},
  title     = {Evaluation of a miniaturized biologically vascularized scaffold in vitro and in vivo},
  series = {Scientific Reports},
  volume    = {8},
  journal   = {Scientific Reports},
  number    = {4719},
  doi       = {10.1038/s41598-018-22688-w},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-176343},
  year      = {2018},
  abstract  = {In tissue engineering, the generation and functional maintenance of dense voluminous tissues is mainly restricted due to insufficient nutrient supply. Larger three-dimensional constructs, which exceed the nutrient diffusion limit become necrotic and/or apoptotic in long-term culture if not provided with an appropriate vascularization. Here, we established protocols for the generation of a pre-vascularized biological scaffold with intact arterio-venous capillary loops from rat intestine, which is decellularized under preservation of the feeding and draining vascular tree. Vessel integrity was proven by marker expression, media/blood reflow and endothelial LDL uptake. In vitro maintenance persisted up to 7 weeks in a bioreactor system allowing a stepwise reconstruction of fully vascularized human tissues and successful in vivo implantation for up to 4 weeks, although with time-dependent decrease of cell viability. The vascularization of the construct lead to a 1.5× increase in cellular drug release compared to a conventional static culture in vitro. For the first time, we performed proof-of-concept studies demonstrating that 3D tissues can be maintained within a miniaturized vascularized scaffold in vitro and successfully implanted after re-anastomosis to the intrinsic blood circulation in vivo. We hypothesize that this technology could serve as a powerful platform technology in tissue engineering and regenerative medicine.},
  language  = {en}
}