resumo
Grooved topography and inherent cell contact guidance has shown promising results regarding cell proliferation, morphology, and lineage-specific differentiation. Yet these approaches are limited to 2D applications. Sandwich-culture conditions are developed to bridge the gap between 2D and 3D culture, enabling both ventral and dorsal cell surface stimulation. The effect of grooved surface topography is accessed on cell orientation and elongation in a highly controlled manner, with simultaneous and independent stimuli on two cell sides. Nanogrooved and non-nanogrooved substrates are assembled into quasi-3D systems with variable relative orientations. A plethora of sandwich-culture conditions are created by seeding cells on lower, upper, or both substrates. Software image analysis demonstrates that F-actin of cells acquires the orientation of the substrate on which cells are initially seeded, independently from the orientation of the second top substrate. Contrasting cell morphologies are observed, with a higher elongation for nanogrooved 2D substrates than nanogrooved sandwich-culture conditions. Correlated with an increased pFAK activity and vinculin staining for sandwich-culture conditions, these results point to an enhanced cell surface stimulation versus control conditions. The pivotal role of initial cell-biomaterial contact on cellular alignment is highlighted, providing important insights for tissue engineering strategies aiming to guide cellular response through mechanotransduction approaches.
palavras-chave
MESENCHYMAL STEM-CELLS; MICROENVIRONMENTS; DIFFERENTIATION; YAP/TAZ; DORSAL
categoria
Chemistry; Science & Technology - Other Topics; Materials Science; Physics
autores
Bjorge, IM; Salmeron-Sanchez, M; Correia, CR; Mano, JF
nossos autores
Clara R. Correia
Investigador
João Mano
Vice-DiretorProjectos
agradecimentos
I.M.Bjorge acknowledges financial support by the Portuguese Foundation for Science and Technology (FCT) with doctoral grant SFRH/BD/129224/2017. This work was supported by the European Research Council grant agreement for the project ATLAS (ERC-2014-ADG-669858) and the FCT project CIRCUS (PTDC/BTM-MAT/31064/2017). This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. Image acquisition was performed by Dr. A. Sofia Silva in the LiM facility of iBiMED, a node of PPBI (Portuguese 4 Platform of BioImaging): POCI-01-0145-FEDER-022122.