Multiphoton Direct Laser Writing and 3D Imaging of Polymeric Freestanding Architectures for Cell Colonization. Issue 27 (30th May 2017)

• Record Type: Journal Article
• Authors: Accardo, Angelo; Blatché, Marie‐Charline; Courson, Rémi; Loubinoux, Isabelle; Thibault, Christophe; Malaquin, Laurent; Vieu, Christophe
• Is Part Of: Small. Volume 13:Issue 27(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-05-30
• Subjects: 3D fabrication -- direct laser writing -- light sheet fluorescence microscopy -- multiphoton confocal imaging -- neuroblastoma cell; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201700621
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract : The realization of 3D architectures for the study of cell growth, proliferation, and differentiation is a task of fundamental importance for both technological and biological communities involved in the development of biomimetic cell culture environments. Here we report the fabrication of 3D freestanding scaffolds, realized by multiphoton direct laser writing and seeded with neuroblastoma cells, and their multitechnique characterization using advanced 3D fluorescence imaging approaches. The high accuracy of the fabrication process (≈200 nm) allows a much finer control of the micro‐ and nanoscale features compared to other 3D printing technologies based on fused deposition modeling, inkjet printing, selective laser sintering, or polyjet technology. Scanning electron microscopy (SEM) provides detailed insights about the morphology of both cells and cellular interconnections around the 3D architecture. On the other hand, the nature of the seeding in the inner core of the 3D scaffold, inaccessible by conventional SEM imaging, is unveiled by light sheet fluorescence microscopy and multiphoton confocal imaging highlighting an optimal cell colonization both around and within the 3D scaffold as well as the formation of long neuritic extensions. The results open appealing scenarios for the use of the developed 3D fabrication/3D imaging protocols in several neuroscientific contexts. Abstract : 3D freestanding polymeric nanostructured scaffolds, fabricated by direct laser writing and characterized by advanced 3D fluorescence imaging techniques, provide favorable conditions for fast‐growing mouse neuroblastoma cell invasion. The high‐resolution imaging analysis reveals optimal colonization of both the external shell and the inner core of the 3D architecture with the formation of long (≈60 µm) neuritic extensions.