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handle: 10261/257053
El cáncer de páncreas es aún uno de los cánceres con menor tasa de supervivencia. Por ello, buscar nuevas formas de discernir su comportamiento en modelos más complejos antes de pasar a la clínica y a modelos animales es de gran importancia, lo que llevaría a descubrir proteínas, rutas o mecanismos diana que abordar. La bioimpresión 3D ha habilitado una prometedora vía para reproducir ambientes tisulares in vivo con el fin de probar nuevas terapias y fármacos. Al ser tan relativamente nueva, la bioimpresión aún necesita estandarizarse, y definir bien los protocolos de producción para poder trasladar los resultados del laboratorio a aplicaciones clínicas. En este proyecto se ha desarrollado una biotinta de hidrogel con células PANC-1 embebidas, y basado en plasma humano, alginato sódico, metilcelulosa. La biotinta ha sido caracterizada y optimizada para poder crear modelos tumorales simples de cáncer de páncreas. Sus propiedades mecánicas, antes y después del entrecruzado han sido medidas reológicamente, así como la compatibilidad de la biotinta con el proceso de impresión 3D y la viabilidad de los modelos a lo largo del tiempo, una vez impresos y puestos en cultivo. Como resultado, se ha demostrado que la línea celular PANC-1 sobrevive en los modelos impresos durante al menos 15 días. Los materiales de la matriz se desintegran poco a poco, dejando espacio suficiente para que las células migren y produzcan su propia matriz extracelular (ECM), aunque esto último aún se ha de probar en futuros experimentos.
Pancreatic cancer holds still a low survival rate, thus the relevance of finding new ways to unravel its behavior in more complex environments prior to clinical trials and animal models; thence discovering target proteins, pathways, or mechanisms. 3D bioprinting has enabled a promising route for reproducing in vivo tissue environments devoted to therapy and drug testing. As new as 3D bioprinting is, standardization of well-defined protocols compared to more settled techniques is necessary for its translation from the bench to clinical applications. In this project, a suitable PANC-1 cell-laden hydrogel bioink based on human plasma, sodium alginate and methylcellulose are characterized and optimized for modeling simple pancreatic tumor constructs. Mechanical properties of prior and postprinted crosslinked inks are rheologically assessed, along with printability of the bioink and viability of the constructs throughout time once in culture. As a result, PANC-1 cells are viable and proliferate within the printed model for at least 15 days. Materials of the printed scaffold slowly disintegrate, providing cells with enough space to migrate and constitute their own ECM, yet to be proved in further experiments.
AEI/FEDER UE (DPI2017-90147-R)
Peer reviewed
tumor modelling, bioink, bioprinting
tumor modelling, bioink, bioprinting
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