Covalent cell surface functionalization of human fetal osteoblasts for tissue engineering

Area of Science:

• Biochemistry
• Cell Biology
• Chemical Biology

Background:

• Cell-surface protein functionalization is crucial for targeted therapies and diagnostics.
• Bioorthogonal chemistry offers precise methods for modifying biomolecules in living systems.

Purpose of the Study:

• To investigate the chemical functionalization of human primary fetal bone cells.
• To develop click chemistry pathways for attaching specific ligands to cell-surface proteins.

Main Methods:

• Developed chemical pathways for click reaction-mediated coupling of alkyne derivatives with cellular azido-expressing proteins.
• Incorporated a tetraethylene glycol linker with a dipeptide and biotin reporter.
• Utilized click chemistry for functionalization of living human fetal osteoblasts.

Main Results:

• Successfully demonstrated proof of concept for introducing cell-specific peptide ligands.
• Enabled tracking of the chemical reaction in living cells using a biotin reporter.
• Achieved chemical functionalization of osteoblasts with excellent cell survival by tuning click reaction conditions.

Conclusions:

• Chemical functionalization of cell-surface proteins is feasible using bioorthogonal click chemistry.
• This approach allows for the targeted introduction of functional molecules onto bone cells.
• The method preserves cell viability, paving the way for in vivo applications.