TY - JOUR TI - A thermo-responsive collagen-nanocellulose hydrogel for the growth of intestinal organoids AU - Curvello, Rodrigo AU - Alves, Diana AU - Abud, Helen E. AU - Garnier, Gil T2 - Materials Science and Engineering: C AB - Three-dimensional (3D) cell culture systems include bioengineered microenvironments that mimic the complexity of human tissues and organs in vitro. Robust biological models, like organoids and spheroids, rely on biomaterials to emulate the biochemical and biomechanical properties found in the extracellular matrix (ECM). Collagen (COL) is the main protein component of the ECM and has been used to generate fibrous matrices for 3D cell culture. Whilst neat COL gels are commonly blended with inert polymers to improve their poor mechanical properties, whether nanocellulose fibers interact or can develop some synergic bioactive effect to support organoid systems has never been demonstrated. Here, we investigate collagen-nanocellulose (COL-NC) hydrogels as a thermo-responsive matrix for the formation and growth of intestinal organoids. Cellulose nanofibres grafted with fibronectin-like adhesive sites form a porous network with type I collagen, presenting a sol-gel transition and viscoelastic profile similar to those of standard animal-based matrices. Crypts embedded in COL-NC form organoids with evidence of epithelial budding. Cell viability and metabolic activity are preserved as well as the expression of key cell markers. The stiffness of COL-NC hydrogels is shown to be a key determinant for the formation and development organoids. COL-NC hydrogels provide an affordable, performant thermo-responsive and sustainable matrix for organoid growth. DA - 2021/03/24/ PY - 2021 DO - 10.1016/j.msec.2021.112051 DP - ScienceDirect SP - 112051 J2 - Materials Science and Engineering: C LA - en SN - 0928-4931 UR - https://www.sciencedirect.com/science/article/pii/S0928493121001909 Y2 - 2021/03/26/22:36:09 KW - Collagen KW - Hydrogel KW - Nanocellulose KW - Organoids KW - Stiffness KW - Thermo-responsive ER -