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Novel method produces highest-ever signals for human embryonic stem cell detection

Molybdenum disulphide sheets used to achieve cell signals two-orders of magnitude higher than previous electrical-based detection methods

Date:
September 26, 2018
Source:
Singapore University of Technology and Design
Summary:
Researchers have developed a way to achieve an ultra-high bioelectric signal from human embryonic stem cells. Using direct current-voltage methods and few-layered 2D molybdenum disulphide (MoS2) sheets, they produced cell signals two-orders of magnitude higher than previous electrical-based detection methods. This method can be combined with complementary metal-oxide-semiconductor circuits to produce a broadly applicable, fast and damage-free stem cell detection method to identify stem cell pluripotency.
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A new method developed by researchers at Singapore University of Technology and Design (SUTD) can potentially ensure patient safety for future stem cell-based therapies, by enhancing native stem cell bioelectric signals.

Reliable methods to monitor and validate stem cell pluripotency are required to advance stem cell therapies and ensure patient safety. Electrical-based detection (EBD) methods are non-invasive and can be used to detect stem cell pluripotency in real-time, and avoid the cost and cell-damaging issues caused by traditional detection methods. However, past EBD methods have produced low current signals, preventing commercialisation.

SUTD researchers PhD candidate Sophia Chan and Dr Desmond Loke, together with colleagues from Nanyang Technological University (NTU) and the Agency for Science, Technology and Research (A*STAR) have developed a method to achieve ultra-high bioelectric signals from human embryonic stem cells (hESCs).

Recently published in ACS Applied Bio Materials, the research team achieved a 1.828 mA cell signal using direct current-voltage measurements and two-dimensional molybdenum disulphide sheets. This is two-orders of magnitude higher than previous EBD methods.

"Stem cells are promising starting materials for currently untreated and life-threatening diseases. However, they are limited by readily available methods to ensure therapeutic safety. Our method is able to enhance native stem cell signals feasible for commercialisation to ensure therapeutic safety." says Chan.

The researchers also demonstrate that the 2D-MoS¬2 sheets enhanced bioelectric signals without affecting the native characteristics of the stem cells. From molecular dynamics (MD) simulations, the group deduced that the increased current flow was a result of the spontaneous interactions formed between the sheets and the cells.


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Materials provided by Singapore University of Technology and Design. Note: Content may be edited for style and length.


Journal Reference:

  1. Sophia S. Y. Chan, Yaw Sing Tan, Kan-Xing Wu, Christine Cheung, Desmond K. Loke. Ultra-High Signal Detection of Human Embryonic Stem Cells Driven by Two-Dimensional Materials. ACS Applied Bio Materials, 2018; 1 (2): 210 DOI: 10.1021/acsabm.8b00085

Cite This Page:

Singapore University of Technology and Design. "Novel method produces highest-ever signals for human embryonic stem cell detection." ScienceDaily. ScienceDaily, 26 September 2018. <www.sciencedaily.com/releases/2018/09/180926110954.htm>.
Singapore University of Technology and Design. (2018, September 26). Novel method produces highest-ever signals for human embryonic stem cell detection. ScienceDaily. Retrieved April 19, 2024 from www.sciencedaily.com/releases/2018/09/180926110954.htm
Singapore University of Technology and Design. "Novel method produces highest-ever signals for human embryonic stem cell detection." ScienceDaily. www.sciencedaily.com/releases/2018/09/180926110954.htm (accessed April 19, 2024).

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