Journal
ACS SENSORS
Volume 4, Issue 9, Pages 2524-2535Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.9b01322
Keywords
biocompatibility; cytotoxicity tests; ion-selective electrodes; biomedical applications; point-of-care
Funding
- KTH Royal Institute of Technology [K-2017-0371]
- Swedish Research Council [VR-2017-4887]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [792824]
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We present the most complete study to date comprising in vitro cytotoxicity tests of ion-selective membranes (ISMs) in terms of cell viability, proliferation, and adhesion assays with human dermal fibroblasts. ISMs were prepared with different types of plasticizers and ionophores to be tested in combination with assays that focus on the medium-term and long-term leaching of compounds. Furthermore, the ISMs were prepared in different configurations considering (i) inner-filling solution-type electrodes, (ii) all-solid-state electrodes based on a conventional drop-cast of the membrane, (iii) peeling after the preparation of a wearable sensor, and (iv) detachment from a microneedle-based sensor, thus covering a wide range of membrane shapes. One of the aims of this study, other than the demonstration of the biocompatibility of various ISMs and materials tested herein, is to create an awareness in the scientific community surrounding the need to perform biocompatibility assays during the the very first steps of any sensor development with an intended biomedical application. This will foster meeting the requirements for subsequent on-body application of the sensor and avoiding further problems during massive validations toward the final in vivo use and commercialization of such devices.
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