In Vitro Electrophysiological Drug Testing on Neuronal Networks Derived from Human Induced Pluripotent Stem Cells

Overview

Journal Stem Cell Res Ther

Publisher Biomed Central

Date 2024 Nov 17

PMID 39551784

Authors

Giulia Parodi

Giorgia Zanini

Linda Collo

Roberta Impollonia

Chiara Cervetto

Monica Frega

Michela Chiappalone

Sergio Martinoia

Affiliations

Soon will be listed here.

Abstract

Background: In vitro models for drug testing constitute a valuable and simplified in-vivo-like assay to better comprehend the biological drugs effect. In particular, the combination of neuronal cultures with Micro-Electrode Arrays (MEAs) constitutes a reliable system to investigate the effect of drugs aimed at manipulating the neural activity and causing controlled changes in the electrophysiology. While chemical modulation in rodents' models has been extensively studied in the literature, electrophysiological variations caused by chemical modulation on neuronal networks derived from human induced pluripotent stem cells (hiPSCs) still lack a thorough characterization.

Methods: In this work, we created three different configurations of hiPSCs-derived neuronal networks composed of fully glutamatergic neurons (100E), 75% of glutamatergic and 25% of GABAergic neurons (75E25I) and fully GABAergic neurons (100I). We focused on the effects caused by antagonists of three of the most relevant ionotropic receptors of the human brain, i.e., 2-amino-5-phosphonovaleric (APV, NMDA receptors antagonist), 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX, AMPA receptors antagonist), and bicuculline, picrotoxin and pentylenetetrazole (BIC, PTX, and PTZ, respectively, GABA receptors antagonists).

Results: We found that APV and CNQX completely abolished the network bursting activity and caused major changes in the functional connectivity. On the other hand, the effect of BIC, PTX and PTZ mostly affected configurations in which the inhibitory component was present by increasing the firing and network bursting activity as well as the functional connectivity.

Conclusions: Our work revealed that hiPSCs-derived neuronal networks are very sensitive to pharmacological manipulation of the excitatory ionotropic glutamatergic and inhibitory ionotropic GABAergic transmission, representing a preliminary and necessary step forward in the field of drug testing that can rely on pathological networks of human origin.

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