In Vitro Multiparametric Cellular Analysis by Micro Organic Charge-modulated Field-effect Transistor Arrays
September 20th, 2021
Here, we present the fabrication protocol of an organic charge-modulated field-effect transistor (OCMFET)-based device for in vitro cellular interfacing. The device, called a micro OCMFET array, is a flexible, low-cost, and reference-less device, which will enable the monitoring of the electrical and metabolic activities of electroactive cell cultures.
Overview
This article presents a fabrication protocol for an organic charge-modulated field-effect transistor (OCMFET)-based device designed for in vitro cellular interfacing. The micro OCMFET array is a flexible, low-cost device that enables the monitoring of electrical and metabolic activities in electroactive cell cultures.
Key Study Components
Area of Science
- Neuroscience
- Biomedical Engineering
- Cellular Biology
Background
- Current cellular analysis methods lack suitable recording systems.
- Multiparametric, biocompatible, and low-cost solutions are needed.
- In vitro systems can reduce reliance on in vivo animal experimentation.
- OCMFET technology allows integration of various sensors for biomarker detection.
Purpose of Study
- To develop a device for monitoring both electrical and metabolic activities of cells.
- To provide a versatile tool for biomedical applications.
- To enhance the analysis of electroactive cell cultures.
Methods Used
- Fabrication of micro OCMFET arrays using a series of deposition and etching techniques.
- Utilization of photolithography for patterning the devices.
- Application of various cleaning and drying methods to prepare substrates.
- Integration of different sensing capabilities into a single device.
Main Results
- The micro OCMFET array successfully monitors electrical and metabolic activities.
- Demonstrated versatility in integrating additional sensors.
- Proved to be a low-cost and flexible solution for cellular interfacing.
- Potential applications in personalized medicine and neurodegenerative disease studies.
Conclusions
- The developed device addresses the need for advanced cellular analysis tools.
- It offers a promising alternative to traditional methods.
- Future studies could expand its applications in various biomedical fields.
Frequently Asked Questions
Executive Industry Relevance
Micro organic charge-modulated field-effect transistor arrays (MOAs) enable multiparametric, in vitro analysis of electrogenic cells, addressing the need for flexible, low-cost, and biocompatible platforms in early drug discovery. By simultaneously monitoring electrical and metabolic activities, these devices support predictive confidence and mechanistic de-risking at the target validation and assay development stages. Their integration potential and scalability position MOAs as reusable assets for portfolio-wide R&D workflows.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Enables direct interrogation of cellular electrical and metabolic responses for functional target validation.
- Supports mechanistic de-risking by distinguishing between spontaneous and induced cellular activities.
- Facilitates pathway clarification through multiparametric readouts in disease-relevant cell models.
Screening & Assay Development
- Provides standardized, reproducible platforms for quantitative measurement of compound effects on cardiomyocytes and neurons.
- Delivers assay-ready systems with integrated electrical and metabolic sensing for high-content screening.
- Supports scalability and platform reuse across multiple cell types and experimental conditions.
Translational & Preclinical Research
- Aligns in vitro cellular responses with translational biomarker strategies for neurodegenerative and cardiac disease models.
- Enables continuity from early discovery through preclinical validation by supporting multiparametric data collection.
- Reduces reliance on in vivo models, supporting risk-adjusted advancement decisions.
Pipeline & Workflow Integration
MOAs fit within the discovery continuum from early hypothesis testing and target validation to lead identification and preclinical research, providing a bridge between mechanistic studies and translational endpoints.
- Discovery Biology: Supports hypothesis testing and pathway analysis by enabling simultaneous monitoring of electrical and metabolic cell activities.
- Screening: Offers reproducible, quantitative outputs for compound evaluation in disease-relevant systems.
- Analytics: Provides high signal-to-noise measurements and multiparametric readouts for robust statistical comparison.
- Translational Research: Facilitates biomarker alignment and preclinical continuity by capturing relevant cellular phenotypes.
- Enterprise Reuse: Delivers a flexible, scalable platform adaptable to diverse R&D programs.
Operational & Enterprise Impact
- Scientific Value: Increases predictive confidence and reduces mechanistic ambiguity in early-stage research.
- Operational Value: Enhances standardization, reproducibility, and scalability of in vitro assays.
- Strategic Value: Improves go/no-go decision quality and capital efficiency by enabling robust, multiparametric data collection.
- Portfolio Impact: Supports risk-adjusted prioritization and advancement across therapeutic areas.
Implementation Considerations
- Requires expertise in organic electronics and cellular electrophysiology for optimal deployment.
- Demands access to photolithography, deposition, and analytical instrumentation for device fabrication and readout.
- Benefits from cross-team standardization to ensure reproducibility and data comparability.
- Adaptable to various cell models with appropriate functionalization and assay design.
- Yield and device performance depend on careful substrate inspection and process control.
Biopharma FAQs
Chapters in this video
0:04
Introduction
1:12
Substrate Selection, Preparation, and Floating Gates (FG): Titanium Deposition
2:11
FG Patterning and Gate Dielectric Deposition
3:55
Opening of the Sensing Areas of the OCMFET for Electrical Activity Recording and Formation of the Vias to Access the Back of the FGs
4:46
Self-Alignment of Source and Drain with the FG
5:15
Gold Deposition, Channel Formation, and Patterning of the Sources, Drains, and Control Gates
6:50
Deposition and Activation of the Parylene C for pH Sensing
7:57
Semiconductor Deposition, Culturing Chamber Placing, and Final Cut-Out of the Device from the PET
8:22
Results: Cellular Electrical and Metabolic Activity Recordings with Micro OCMFET Arrays (MOA)
9:27
Conclusion
