Novel cell-based odorant sensor elements based on insect odorant receptors

Area of Science:

• Biotechnology
• Biosensor Development
• Chemical Sensing

Background:

• Cell-based odorant sensors require high sensitivity, selectivity, and long-term stability for practical use.
• Existing cell-based sensors often suffer from short operational lifespans, limiting their applicability.

Purpose of the Study:

• To develop a novel cell-based odorant sensor element with enhanced sensitivity, selectivity, and long-term stability.
• To demonstrate the feasibility of integrating these sensor elements into a microfluidic chip for compact odor detection.

Main Methods:

• Utilized Sf21 cell lines engineered to express insect odorant receptors.
• Assessed sensor sensitivity to odorants in solution, down to tens of parts per billion.
• Evaluated selective odorant discrimination based on expressed receptor properties.
• Monitored sensor responsiveness and stability over an extended period (at least 2 months).
• Integrated the engineered cell lines into a microfluidic chip to create a compact sensor.

Main Results:

• The developed odorant sensor elements exhibit high sensitivity (tens of parts per billion) and selectivity.
• Consistent sensor responsiveness was maintained for at least 2 months, significantly improving lifespan.
• Response times were recorded at approximately 13 seconds.
• A compact odorant sensor chip was successfully developed by integrating the cell lines into a microfluidic device.

Conclusions:

• The novel cell-based odorant sensor demonstrates significant improvements in sensitivity, selectivity, and long-term stability.
• The established methodology, leveraging insect odorant receptors, provides a robust platform for developing practical cell-based odor sensors.
• This technology holds promise for diverse applications in food administration and health management.