Nanoparticle
Nanoparticle — A particle between 1 and 100 nanometers in size, used as a delivery vehicle for peptides to improve stability, targeting, and bioavailability.
What Are Nanoparticles in Peptide Research?
Nanoparticles are particles with dimensions between 1 and 1000 nm used as delivery vehicles for peptide compounds. They protect encapsulated peptides from enzymatic degradation, enable controlled release over extended periods, improve cellular uptake, and can be targeted to specific tissues through surface modification with targeting ligands.
Nanoparticle Types for Peptide Delivery
- PLGA nanoparticles: Biodegradable polymer particles (100-300 nm). FDA-approved polymer. Sustained release over days to weeks
- Liposomes: Lipid bilayer vesicles (50-200 nm) that encapsulate hydrophilic peptides in the aqueous core or embed hydrophobic peptides in the membrane
- Self-assembling peptide nanoparticles: Peptide amphiphiles that spontaneously form nanofibers, micelles, or vesicles
- Gold nanoparticles: Surface-conjugated with peptides for imaging, diagnostics, and photothermal therapy
Characterization
Size by dynamic light scattering, morphology by electron microscopy, encapsulation efficiency by HPLC after extraction, release kinetics by dialysis, and surface charge by zeta potential. Peptide integrity must be verified after encapsulation by mass spectrometry.
Frequently Asked Questions
What is Nanoparticle?
A particle between 1 and 100 nanometers in size, used as a delivery vehicle for peptides to improve stability, targeting, and bioavailability.
Why is Nanoparticle important in peptide research?
Nanoparticle is a fundamental concept in technology as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.