Development and Characterization of a 96‐Well Exposure System for Safety Assessment of Nanomaterials

Abstract

In this study, a 96‐well exposure system for safety assessment of nanomaterials is developed and characterized using an air–liquid interface lung epithelial model. This system is designed for sequential nebulization. Distribution studies verify the reproducible distribution over all 96 wells, with lower insert‐to‐insert variability compared to non‐sequential application. With a first set of chemicals (TritonX), drugs (Bortezomib), and nanomaterials (silver nanoparticles and (non‐)fluorescent crystalline nanocellulose), sequential exposure studies are performed with human lung epithelial cells followed by quantification of the deposited mass and of cell viability. The developed exposure system offers for the first time the possibility of exposing an air–liquid interface model in a 96‐well format, resulting in high‐throughput rates, combined with the feature for sequential dosing. This exposure system allows the possibility of creating dose‐response curves resulting in the generation of more reliable cell‐based assay data for many types of applications, such as safety analysis. In addition to chemicals and drugs, nanomaterials with spherical shapes, but also morphologically more complex nanostructures can be exposed sequentially with high efficiency. This allows new perspectives on in vivo‐like and animal‐free approaches for chemical and pharmaceutical safety assessment, in line with the 3R principle of replacing and reducing animal experiments.

Bridging Smart Nanosystems with Clinically Relevant Models and Advanced Imaging for Precision Drug Delivery

“…Novel ALI-based approaches have been equipped with commercial gaseous exposure systems to test the cellular effect of gases in the gaseous phase for inhaled NPs and drugs, which allows precise exposing dosimetry without any interfering medium. [211] (Figure 12B,C). More importantly, gaseous exposure in ALI-based displayed similar therapeutic efficacy but faster uptake kinetics compared with submerged exposure, [211b] which may pave the way for mimicking inhaled nanomaterials with a potentially more predictive cellular response.…”