Extended analysis of intratumoral heterogeneity of primary osteosarcoma tissue using 3D-in-vivo-tumor-model
Issue title: Selected papers of the 39th Conference of the German Society for Clinical Microcirculation and Hemorheology, 6-7 November 2020, Hannover, Germany
Guest editors: B. Hiebl, A. Krüger-Genge and F. Jung
Affiliations: [a] Institute for Molecular and Cellular Anatomy, University of Regensburg, Regensburg, Germany
| [b] Center of Plastic, Aesthetic, Hand and Reconstructive Surgery, University of Regensburg, Regensburg, Germany
| [c] Department of Orthopaedics and Sportorthopaedics, Technical University of Munich, Klinikum rechts der Isar, Munich, Germany
| [d] Sarcoma and Musculoskeletal Oncoplastic Division, Department of Orthopaedic Surgery, University of Medicine, Mandalay, Myanmar
Correspondence:
[*]
Corresponding author: Prof. Dr. Silke Härteis, Institute for Molecular and Cellular Anatomy, University of Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany. Tel.: +49 0 941 943 2879; Fax: +49 0 941 943 2868; E-mail: silke.haerteis@ur.de.
Abstract: BACKGROUND:Osteosarcomas are a rare, heterogeneous and malignant group of bone tumors that have a high potential for metastasis and aggressive growth patterns. Treatment of metastasized osteosarcoma is often insufficient and research is compromised by problems encountered when culturing cells or analyzing genetic alterations due to the high level of intratumoral and intertumoral heterogeneity. The chick chorioallantoic membrane (CAM) model, a 3D-in-vivo-tumor-model, could potentially facilitate the investigation of osteosarcoma heterogeneity at an individual and highly specified level. OBJECTIVE:Objective was to establish the grafting and transplantation of different primary osteosarcoma tissue parts onto several consecutive CAMs for tumor profiling and investigation of osteosarcoma heterogeneity. METHODS:Various parts of primary osteosarcoma tissue were grafted onto CAMs and were transplanted onto another CAM for five to seven consecutive times, enabling further experimental analyzes. RESULTS:Primary osteosarcoma tissue parts exhibited satisfactory growth patterns and displayed angiogenic development on the CAM. It was possible to graft and transplant different tumor parts several times while the tissue viability was still high and tumor profiling was performed. CONCLUSIONS:Primary osteosarcoma tissue grew on several different CAMs for an extended time period and neovascularization of serial transplanted tumor parts was observed, improving the versatility of the 3D-in-vivo-tumor-model.
