Modulating reconstituted high density lipoprotein functionality to target the Pseudomonas aeruginosa quorum sensing...

Area of Science:

• Biochemistry
• Molecular Biology
• Nanotechnology

Background:

• Synthetic high density lipoproteins (reconstituted HDL, reHDL) are emerging as versatile therapeutic vectors.
• reHDL can access tissues beyond the vascular compartment, offering broad therapeutic reach.
• Current reHDL applications leverage inherent HDL functions; novel functional modulation is explored.

Purpose of the Study:

• To investigate the modulation of HDL functionality by attaching non-native peptides.
• To determine if engineered HDL can acquire new therapeutic properties.

Main Methods:

• A peptide chimera was constructed by linking the signal peptide of paraoxonase-1 (PON1) to paraoxonase-2 (PON2).
• The chimera's properties, including secretion, HDL binding, and enzymatic activity, were assessed.
• In vitro studies evaluated the engineered HDL's effect on bacterial virulence factors.

Main Results:

• The PON1 signal peptide successfully directed PON2 secretion and HDL binding.
• The resulting chimera protein exhibited stable enzyme activity and hydrolyzed PON2 substrates.
• Engineered HDL significantly reduced Pseudomonas aeruginosa virulence, including biofilm formation and quorum sensing.

Conclusions:

• This study demonstrates proof-of-principle for peptide attachment to HDL to modulate its function.
• Engineered HDL, distributed in extracellular fluids, offers a novel vector for therapeutic strategies.
• This approach holds potential for treating various pathophysiological conditions.