Monitoring Ion Channel Function In Real Time Through Quantum Decoherence

TL;DR

This paper proposes a novel, non-invasive method using quantum nanotechnology, specifically nitrogen-vacancy centers in nano-diamonds, to monitor ion channel activity in real time at millisecond resolution, with potential applications in drug discovery.

Contribution

It is the first to analyze the quantum dynamics of NV probes near ion channels in complex biological environments, enabling real-time detection of ion channel operation.

Findings

Quantum decoherence of NV centers can indicate ion channel activity.

Real-time detection at millisecond resolution is theoretically feasible.

Potential for scalable, array-based biological sensing systems.

Abstract

In drug discovery research there is a clear and urgent need for non-invasive detection of cell membrane ion channel operation with wide-field capability. Existing techniques are generally invasive, require specialized nano structures, or are only applicable to certain ion channel species. We show that quantum nanotechnology has enormous potential to provide a novel solution to this problem. The nitrogen-vacancy (NV) centre in nano-diamond is currently of great interest as a novel single atom quantum probe for nanoscale processes. However, until now, beyond the use of diamond nanocrystals as fluorescence markers, nothing was known about the quantum behaviour of a NV probe in the complex room temperature extra-cellular environment. For the first time we explore in detail the quantum dynamics of a NV probe in proximity to the ion channel, lipid bilayer and surrounding aqueous environment. Our theoretical results indicate that real-time detection of ion channel operation at millisecond resolution is possible by directly monitoring the quantum decoherence of the NV probe. With the potential to scan and scale-up to an array-based system this conclusion may have wide ranging implications for nanoscale biology and drug discovery.