Principles of responsive lanthanide-based luminescent probes for cellular imaging

Area of Science:

• Chemical Biology
• Biochemistry
• Molecular Imaging

Background:

• Organic dyes and fluorescent proteins have revolutionized cellular imaging.
• Lanthanide-based probes represent a novel class of responsive luminescent probes for cellular processes.
• The full potential of lanthanide probes in scientific research remains largely unrecognized.

Purpose of the Study:

• To elucidate the principles behind the development of lanthanide-based probes for cellular imaging.
• To highlight the advantages of lanthanide probes over existing imaging technologies.
• To provide a framework for designing novel lanthanide sensors for specific analytes.

Main Methods:

• Rational design of lanthanide complexes by manipulating luminescence parameters.
• Utilizing long luminescence lifetimes for time-gated quantitative measurements.
• Engineering narrow, non-overlapping emission bands for multiplexed detection.
• Investigating sensors based on inner-sphere water molecules, antenna-lanthanide distance, excited state energies, and photoinduced electron transfer (PeT) switches.

Main Results:

• Lanthanide probes enable quantitative spatial determination of intracellular analyte concentration via time-gating.
• Simultaneous detection of multiple analytes without cross-interference is achievable due to narrow, distinct emission bands.
• The design of lanthanide sensors can be rationally controlled by modifying key luminescent properties.

Conclusions:

• Lanthanide probes offer significant advantages for cellular imaging, including quantitative analysis and multiplexing capabilities.
• Further exploration and application of lanthanide probes are warranted to fully leverage their potential in biological and biochemical research.
• This work provides foundational principles for the rational design of advanced lanthanide-based sensing platforms.