In Vivo Gold Complex Catalysis within Live Mice.

Area of Science:

• Bioinorganic Chemistry
• Chemical Biology
• Biomedical Imaging

Background:

• Metal complex catalysis is restricted in biological systems, mainly to cellular and bacterial environments.
• Developing targeted catalytic systems for complex organisms remains a significant challenge.

Purpose of the Study:

• To design and develop a novel metal complex capable of organ-specific catalysis within a live mammalian system.
• To enable localized protein modification and imaging in vivo using a bio-inspired catalyst.

Main Methods:

• Synthesis and characterization of a glycoalbumin-gold(III) complex.
• In vivo administration of the complex in live mice.
• Utilizing propargyl ester amidation for protein labeling.
• Employing fluorescent probes (Cy7.5 and TAMRA) for imaging targeted reactivity.

Main Results:

• Demonstrated organ-specific, localized propargyl ester amidation of proteins in live mice using the glycoalbumin-Au(III) complex.
• Successfully imaged the targeted catalytic activity via fluorescent probes.
• Established a proof-of-concept for in vivo metal complex catalysis.

Conclusions:

• The developed glycoalbumin-Au(III) complex facilitates targeted protein modification in live animals.
• This system enables visualization of catalytic activity within specific organs.
• The strategy holds potential for advancing metal catalysis in biomedical and clinical settings.