Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Microfluidic Live-Imaging Technology to Perform Research Activities in 3D Models

Version 1 : Received: 8 March 2021 / Approved: 9 March 2021 / Online: 9 March 2021 (11:15:30 CET)
Version 2 : Received: 11 March 2021 / Approved: 12 March 2021 / Online: 12 March 2021 (11:29:04 CET)

How to cite: Capuzzo, A.M.; Vigo, D. Microfluidic Live-Imaging Technology to Perform Research Activities in 3D Models. Preprints 2021, 2021030264 (doi: 10.20944/preprints202103.0264.v2). Capuzzo, A.M.; Vigo, D. Microfluidic Live-Imaging Technology to Perform Research Activities in 3D Models. Preprints 2021, 2021030264 (doi: 10.20944/preprints202103.0264.v2).

Abstract

Morphological dissimilarity and its evolution over time are one of the most unexpected variations found when comparing cell cultures in 2D and 3D. Monolayer cells appear to flatten in the lower part of the plate, adhering to and spreading in the horizontal plane while not extending vertically. Consequently, cells developed in two dimensions have a forced apex-basal polarity. Co-cultivation and crosstalking between multiple cell types, which control development and formation in the in vivo counterpart, are possible in 3D cultures. With or without a scaffold matrix, 3D model culture may exhibit more in vivo-like morphology and physiology. 3D cultures mimic relevant physiological cellular processes, transforming them into one-of-a-kind drug screening platforms. The structures and dynamics of regulatory networks, which are increasingly studied with live-imaging microscopy, must be considered to help and guarantee the functional maintenance of a 3D structure. However, commercially available technologies that can be used for current laboratory needs are minimal, despite the need to make it easier to acquire cellular kinetics with high spatial and temporal resolution, in order to improve visual efficiency and, as a result, experimentation performance. The CELLviewer is a newly developed multi-technology instrument that integrates and synchronizes the work of various scientific disciplines. The aim of this study is to test the device using two different models: a single Jurkat cell and an MCF-7 spheroid. The two models are loaded into the microfluidic cartridge for each experiment after they have been grown and captured in time-lapse for a total of 4 hours. The samples used are tracked under the operation of the optics after adaptive autofocus, while slipping inside the cartridge chamber, and the 3D rotation was successfully obtained experimentally. The MitoGreen dye, a fluorescence marker selectively permeable to live cells, was then used to determine cell viability. To measure the model diameter, construct fluorescence intensity graphs along a straight line passing through the cell, and visualize the spatial fluorescence intensity distribution in 3D, ImageJ software was used.

Keywords

Microfluidic; CELLviewer; Spheroids; Imaging; Biomedical;

Comments (1)

Comment 1
Received: 12 March 2021
Commenter: Arnaud Martino Capuzzo
Commenter's Conflict of Interests: Author
Comment: Abstract and Methods section
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