1. Preclinical Study of Radiation on Fat Flap Regeneration under Tissue-engineering Chamber: Potential Consequences for Breast Reconstruction
- Author
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Cleret, D. (Damien), Gradwohl, M. (Marion), Dekerle, L. (Lucie), Drucbert, A-S. (Anne-Sophie), Idziorek, T. (Thierry), Pasquier, D. (David), Blanchemain, N. (Nicolas), Payen, J. (Julien), Guerreschi, P. (Pierre), Marchetti, P. (Philippe), Université de Lille, Inserm, CHU Lille, Cancer Heterogeneity, Plasticity and Resistance to Therapies (CANTHER) - UMR 9020 - UMR 1277, Advanced Drug Delivery Systems (ADDS) - U1008, Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189, Médicaments et biomatériaux à libération contrôlée: mécanismes et optimisation - Advanced Drug Delivery Systems - U 1008 [MBLC - ADDS], Cancer Heterogeneity, Plasticity and Resistance to Therapies - UMR 9020 - U 1277 [CANTHER], Institut de Cancérologie de Lorraine - Alexis Vautrin [Nancy] [UNICANCER/ICL], Centre Hospitalier Régional Universitaire [Lille] [CHRU Lille], Santé Ingénierie Biologie Saint-Etienne (SAINBIOSE), Centre Ingénierie et Santé (CIS-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM), Médicaments et biomatériaux à libération contrôlée: mécanismes et optimisation - Advanced Drug Delivery Systems - U 1008 (MBLC - ADDS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Cancer Heterogeneity, Plasticity and Resistance to Therapies - UMR 9020 - U 1277 (CANTHER), Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Centre National de la Recherche Scientifique (CNRS), Lattice Medical [Loos], Institut de Cancérologie de Lorraine - Alexis Vautrin [Nancy] (UNICANCER/ICL), UNICANCER, Centre Régional de Lutte contre le Cancer Oscar Lambret [Lille] (UNICANCER/Lille), Université de Lille-UNICANCER, and Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)
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[SDV]Life Sciences [q-bio] ,Surgery - Abstract
International audience; Background: Use of a tissue-engineering chamber (TEC) for growth of fat flap is a promising approach for breast reconstruction. Here, we evaluated in a preclinical model the effects of radiation on adipose tissue growth either before or after 3D-printed bioresorbable TEC implantation. Methods: Twenty-eight female Wistar rats were distributed into three groups: TEC implantation as nonirradiated controls (G1), TEC insertion followed by irradiation 3 weeks later (G2), and irradiation 6 weeks before TEC insertion (G3). G2 and G3 received 33.3 Gy in nine sessions of 3.7 Gy. Growth of the fat flap was monitored via magnetic resonance imaging. At 6 months after implantation, fat flaps and TECs were harvested for analysis. Results: Irradiation did not alter the physicochemical features of poly(lactic-co-glycolic acid)-based TECs. Compared with G1, fat flap growth was significantly reduced by 1.6 times in irradiated G2 and G3 conditions. In G2 and G3, fat flaps consisted of mature viable adipocytes sustained by CD31+ vascular cells. However, 37% (3 of 8) of the G2 irradiated adipose tissues presented a disorganized architecture invaded by connective tissues with inflammatory CD68 + cells, and the presence of fibrosis was observed. Conclusions: Overall, this preclinical study does not reveal any major obstacle to the use of TEC in a radiotherapy context. Although irradiation reduces the growth of fat flap under the TEC by reducing adipogenesis and inducing inconsistent fibrosis, it does not impact flap survival and vascularization. These elements must be taken into account if radiotherapy is proposed before or after TEC-based breast reconstruction.
- Published
- 2022
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