Green Fluorescent Terbium (III) Complex Doped Silica Nanoparticles

Area of Science:

• Biomaterials Science
• Nanotechnology
• Molecular Imaging

Background:

• Conventional organic dyes lack photostability.
• Cadmium-based quantum dots exhibit toxicity.
• Need for advanced probes for biological labelling.

Purpose of the Study:

• Develop novel fluorescent probes for in vitro and in vivo labelling.
• Investigate silica nanoparticle-based lanthanide probes for translocator protein (TSPO) targeting.
• Utilize TSPO receptor detection for early diagnosis and therapy of diseases.

Main Methods:

• Fabrication of fluorescent lanthanide probes using silica nanoparticles.
• Encapsulation of terbium(III)-calix[4]arene complexes within silica nanoparticles.
• Surface functionalization with amine groups and conjugation with TSPO ligands.

Main Results:

• Successful transfer of terbium complex photophysical properties to nanoarchitectures.
• Demonstrated high biocompatibility via cell viability assays.
• Proven selectivity towards TSPO mitochondrial membrane receptors through subcellular fractional studies.

Conclusions:

• The developed nanostructure shows promise for in vitro labelling of mitochondria.
• Highlights the potential of this probe for targeting TSPO in pathological states.
• Offers a biocompatible and photostable alternative for biological imaging.