Implantable Light-Powered Human Designer Cells for Electrical Energy Generation

Area of Science:

• Bioelectronics
• Synthetic Biology
• Renewable Energy

Background:

• Conventional power sources for bioelectronic devices face limitations.
• Need for self-sustaining, biocompatible energy solutions for implants and wearables.

Purpose of the Study:

• To develop an implantable, miniature biohybrid device powered by light-activated designer cells.
• To demonstrate the feasibility of a cell-based photovoltaic system.

Main Methods:

• Genetically engineered human designer cells expressing light-activated ion channels and proton pumps.
• Custom-designed polycarbonate chambers with electrodes and a proton-selective membrane.
• Illumination with simulated sunlight to induce ion-gradient formation and electrical current.

Main Results:

• A single solar collection device (SCD) generated ≈0.4 V under simulated sunlight (3 mW cm⁻²).
• Multiple SCDs connected in series and increased cell volume scaled output to power an LED.
• Demonstrated sustained proton gradient and electrical potential generation.

Conclusions:

• Feasibility of a novel photovoltaic system using optogenetically engineered mammalian cells.
• Potential for powering bioelectronic implants and wearable devices.
• Highlights a new avenue in biohybrid energy harvesting.