Selective intracellular delivery and intracellular recordings combined on MEA biosensors

TL;DR

This paper presents a multifunctional biosensor platform that combines intracellular recording of large cell populations with targeted intracellular delivery, enabling advanced studies of cell communication and drug effects.

Contribution

It introduces a novel device integrating microfluidics and 3D nanostructures for simultaneous intracellular recording and selective delivery on MEA biosensors.

Findings

Recorded intracellular-like signals from cardiomyocyte ensembles.

Achieved targeted delivery of molecules into single cells.

Demonstrated potential for studying drug effects on cell networks.

Abstract

Biological studies on in vitro cell cultures are of fundamental importance to investigate cells response to external stimuli, such as new drugs for treatment of specific pathologies, or to study communication between electrogenic cells. Although three-dimensional (3D) nanostructures brought tremendous improvements on biosensors used for various biological in vitro studies, including drug delivery and electrical recording, there is still a lack of multifunctional capabilities that could help gaining deeper insights in several bio-related research fields. In this work, the electrical recording of large cell ensembles and the intracellular delivery of few selected cells are combined on the same device by integrating microfluidics channels on the bottom of a multi-electrode array decorated with 3D hollow nanostructures. The novel platform allows to record intracellular-like action potentials from large ensembles of cardiomyocytes derived from human Induced Pluripotent Stem Cells (hiPSC) and from the HL-1 line, while different molecules are selectively delivered into single/few targeted cells. The proposed approach shows high potential for enabling new comprehensive studies that can relate drug effects to network level cell communication processes.