Cascade-heterogated proton nanotransistors for multiplex pH-interval imaging.

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Molecular Imaging

Background:

• Strict pH regulation is crucial for organismal homeostasis.
• Pathological conditions often involve distinct pH dysregulation, presenting diagnostic and therapeutic targets.
• Existing methods lack selective reporting for specific acidic pH intervals in biological systems.

Purpose of the Study:

• To design and develop band-pass light-up nanokits (BLINK) for selective reporting of acidic pH intervals.
• To create a nanodevice capable of gating responses to different proton levels.
• To enable precise optical imaging of pathophysiological pH dynamics.

Main Methods:

• Integration of transistor-like polymeric modules for ultra-fast nanophase transitions (<15 ms).
• Utilizing tandem Förster Resonance Energy Transfer (FRET) relay between encoded fluorophores.
• Implementing pH heterogating capacity for selective response to specific pH ranges.

Main Results:

• BLINK nanokits demonstrate selective reporting of acidic intervals with precision up to 0.25 pH units.
• The nanodevice achieves ultra-fast (<15 ms) and cascade nanophase transitions.
• Acidic extracellular or intracellular signals are selectively transformed into exponentially amplified fluorescence readouts.

Conclusions:

• BLINK provides a valuable tool for precise pH sensing in biological environments.
• This technology enables interval-based optical imaging for disease diagnosis and treatment.
• The developed nanokits offer a novel approach for monitoring dynamic pH changes in pathophysiological conditions.