A microelectrode array chip for osteogenic differentiation of mesenchymal stem cells under electrical stimulation
Tianyang Zheng1, Zhizhong Zhang1, Rong Zhu1
1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, China. zr_gloria@mail.tsinghua.edu.cn.
Lab on a Chip
|December 19, 2019
Summary
This study introduces a novel microelectrode array for electrical stimulation (ES) to enhance mesenchymal stem cell (MSC) osteogenic differentiation. The method improves bone healing potential by accelerating cell proliferation and mineralization in situ.
Area of Science:
- Biomedical Engineering
- Stem Cell Biology
- Tissue Engineering
Background:
- Electrical stimulation (ES) is a common method for inducing stem cell differentiation, particularly for osteogenic differentiation of mesenchymal stem cells (MSCs).
- The micro-effects of inhomogeneous electric fields in ES and limitations of ex situ assays for assessing stem cell differentiation are not well understood.
Purpose of the Study:
- To develop and evaluate a novel microelectrode array chip for electrical stimulation to induce osteogenic differentiation of MSCs.
- To investigate the micro-effect of an inhomogeneous electric field on MSC osteogenic differentiation.
- To enable direct in situ assessment of stem cell differentiation.
Main Methods:
- A microelectrode array chip was designed to apply electrical stimulation to MSCs, mimicking natural differentiated cell aggregation patterns.
- In situ alizarin red staining, morphology observation, and immunocytochemistry were used to assess cell proliferation and differentiation.
- A single-chip in situ assessment was developed to compare differentiation with and without ES, controlling for culture variations.
Main Results:
- The proposed ES method significantly accelerated osteoblast proliferation and differentiation within the electrode array region.
- A greater amount of mineralized deposits was observed in the stimulated regions.
- The in situ assessment method effectively compared ES effects, avoiding variations from separate culture environments.
Conclusions:
- The microelectrode array ES method is effective in promoting MSC osteogenic differentiation and mineralization.
- This approach provides a fundamental platform for studying induced stem cell differentiation.
- The integrated in situ assessment enables real-time tracking and analysis of stem cell differentiation processes.
