Cellular prostheses: functional abiotic nanosystems to probe, manipulate, and endow function in live cells

Area of Science:

• Nanotechnology
• Cellular Biology
• Biophysics

Background:

• Nanoscale structures (1-10 nm) are being developed to interact directly with live cells.
• Photovoltaic functional abiotic nanosystems (PV-FANs) are introduced as a novel class of cellular-level prostheses.
• These systems can probe, manipulate, and endow functions to cells.

Purpose of the Study:

• To illustrate the concept of cellular prostheses using light-activated nanoscale photodiodes.
• To investigate the modulation of voltage-gated ion channels in excitable cells via local electric fields generated by PV-FANs.
• To examine the feasibility of PV-FANs in activating action potentials by exceeding the 10 mV depolarization threshold.

Main Methods:

• Modeling the membrane potential modulation using an equivalent circuit.
• Analyzing the dynamics of photovoltaic functional abiotic nanosystems (PV-FANs).
• Discussing various approaches for implementing PV-FANs.

Main Results:

• Light-activated nanoscale photodiodes can create local electric fields.
• These fields modulate existing voltage-gated ion channels in excitable cells.
• The potential to exceed the 10 mV depolarization threshold for action potential activation was examined.

Conclusions:

• Photovoltaic functional abiotic nanosystems (PV-FANs) serve as effective cellular prostheses.
• PV-FANs offer a paradigm-changing opportunity at the frontiers of nanomedicine.
• These systems can provide diverse functions in response to various stimuli.