Event Abstract Back to Event Bioengineered uterine tissue to support pregnancy in a rat model Mats Hellstrom1, Juan M. Moreno-Moya1, Sara Bandstein1, Eva Bom1, Randa R. El-Akouri1, Kaoru Miyazaki2, Tetsuo Maruyama2 and Mats Brännström1 1 Sahlgrenska Academy, University of Gothenburg, Dept. of Obstetrics and Gynecology, Sweden 2 School of Medicine, Keio University, Dept. of Obstetrics and Gynecology, Japan Introduction: Absolute uterine factor infertility due to congenital/surgical absence of the uterus, or due to malformation or intrauterine adhesions affects about 1:500 women. Our group reported the first ever live birth after human uterus transplantation last year and this has now been followed by more births. Thus, this previously untreatable condition can now effectively be cured although with associated problems of risky donor surgery, organ shortage and side-effects of immunosuppression. The creation of a bioengineered uterus would circumvent these issues. In our animal-based research towards a human bioengineered uterus we initially use the rat model. In this study we have explored the creation of bioengineered uterine patches for tests in vivo as a step towards the creation of a complete bioengineered uterus, but also to test this patch-concept as a way of uterine-repair of a partially defect uterus. Methods: Decellularization was achieved by whole-uterus perfusion through the uterine arteries with buffered/non-buffered Triton-X100/DMSO (Group 1/2) or sodium deoxycholate (Group 3). Recellularization was achieved by injecting GFP labelled mesenchymal stem cells and uterus primary cells into the patches (5x10mm). Three days later one patch per uterus was transplanted into SD-rats to repair created uterus defects, and 6 weeks later the animals were mated. The experiments were terminated 16-20 days after mating to assess pregnancy results (number and sites of fetuses; immunohistochemistry; qPCR). Results and Discussion: Successful recellularization was confirmed by fluorescence and immunohistochemistry, but revealed limited cell distribution. Pregnancy and fetal development was normal in Group 1 and 2, with fetal development over patch areas. Group 3 showed a significant reduction in fetal numbers and no fetal development in the graft area. qPCR and immunohistochemistry revealed uterus-like tissue in the patches, with a remodulation by infiltrating host cells. Conclusion: The functionality of the reccellularized Triton-X100/DMSO-generated scaffolds was near normal and these protocols should be explored further towards the development of bioengineered uterine patches to treat partially defect uteri. Keywords: Regenerative Medicine, Tissue Regeneration, in vivo tissue engineering, acellullar matrix Conference: 10th World Biomaterials Congress, Montréal, Canada, 17 May - 22 May, 2016. Presentation Type: New Frontier Oral Topic: Biomaterials in constructing tissue substitutes Citation: Hellstrom M, Moreno-Moya JM, Bandstein S, Bom E, El-Akouri RR, Miyazaki K, Maruyama T and Brännström M (2016). Bioengineered uterine tissue to support pregnancy in a rat model. Front. Bioeng. Biotechnol. Conference Abstract: 10th World Biomaterials Congress. doi: 10.3389/conf.FBIOE.2016.01.01405 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 27 Mar 2016; Published Online: 30 Mar 2016. Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Mats Hellstrom Juan M Moreno-Moya Sara Bandstein Eva Bom Randa R El-Akouri Kaoru Miyazaki Tetsuo Maruyama Mats Brännström Google Mats Hellstrom Juan M Moreno-Moya Sara Bandstein Eva Bom Randa R El-Akouri Kaoru Miyazaki Tetsuo Maruyama Mats Brännström Google Scholar Mats Hellstrom Juan M Moreno-Moya Sara Bandstein Eva Bom Randa R El-Akouri Kaoru Miyazaki Tetsuo Maruyama Mats Brännström PubMed Mats Hellstrom Juan M Moreno-Moya Sara Bandstein Eva Bom Randa R El-Akouri Kaoru Miyazaki Tetsuo Maruyama Mats Brännström Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.