resumo
Inspired by native extracellular matrix (ECM) together with the multilevel architecture observed in nature, a material which topography recapitulates topographic features of the ECM and the internal architecture mimics the biological materials organization is engineered. The nanopatterned design along the XY plane is combined with a nanostructured organization along the Z axis on freestanding membranes prepared by layer-by-layer deposition of chitosan and chondroitin sulfate. Cellular behavior is monitored using two different mammalian cell lines, fibroblasts (L929) and myoblasts (C2C12), in order to perceive the response to topography. Viability, proliferation, and morphology of L929 are sensitively controlled by topography; also differentiation of C2C12 into myotubes is influenced by the presence of nanogrooves. This kind of nanopatterned structure has also been associated with strong cellular alignment. To the best of the knowledge, it is the first time that such a straightforward and inexpensive strategy is proposed to produce nanopatterned freestanding multilayer membranes. Controlling cellular alignment plays a critical role in many human tissues, such as muscles, nerves, or blood vessels, so these membranes can be potentially useful in specific tissue regeneration strategies.
palavras-chave
CHITOSAN
categoria
Engineering; Science & Technology - Other Topics; Materials Science
autores
Sousa, MP; Caridade, SG; Mano, JF
nossos autores
João Mano
Vice-Diretor
Maria Sousa
Estudante de doutoramento
Sofia Caridade
Bolseiro de pós-Doutoramentoagradecimentos
Maria P. Sousa acknowledges the Portuguese Foundation for Science and Technology (FCT) for financial support through Grant No. SFRH/BD/97606/2013 and Sofia G. Caridade through Grant No. SFRH/BPD/96797/2013. This work was also supported by the European Research Council Grant Agreement ERC-2014-ADG-669858 for project "ATLAS", as well as by the H2020-TWINN-2015 - Twinning European project "CHEM2NATURE" (Grant Agreement no. 692333). The acknowledgements Section of this article was updated August 9.