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Synthesis of Immunotargeted Magneto-plasmonic Nanoclusters
Published on: August 22, 2014
Immunochemical characterization of antibody-coated nanoparticles
F Velge-Roussel1, P Breton, X Guillon
1CJF INSERM 93-09, Equipe associée INRA d'Immunologie Parasitaire, UFR des Sciences Pharmaceutiques, Tours (France).
Experientia
|August 15, 1996
Summary
Researchers used surface plasmon resonance (SPR) to show that anti-CD4 antibody-coated nanoparticles specifically bind to CD4 molecules. This confirms their potential as targeted drug delivery systems (pharmacophores).
Area of Science:
- Biotechnology
- Nanomedicine
- Immunology
Background:
- Antibody-functionalized nanoparticles offer targeted delivery potential.
- Understanding antibody-nanoparticle interactions is crucial for developing effective nanomedicines.
Purpose of the Study:
- To characterize the specific binding of anti-CD4 antibody (IOT4a) adsorbed on poly(methylidene malonate 2.1.2) (PMM 2.1.2) nanoparticles to the CD4 molecule.
- To estimate the number of antibodies per nanoparticle and assess their accessibility.
- To evaluate the suitability of these immunonanoparticles as antibody-targeted pharmacophores.
Main Methods:
- Surface Plasmon Resonance (SPR) using BIAcore instrumentation.
- Immobilization of anti-CD4 monoclonal antibody (IOT4a) onto PMM 2.1.2 nanoparticles.
- Analysis of binding kinetics with CD4 molecules and control antibodies (rabbit anti-mouse Fc).
Main Results:
- Demonstrated specific interaction between IOT4a-PMM 2.1.2 nanoparticles and CD4 molecules.
- Molar ratio (Fc)/(Fab) of 1 indicated accessible epitopes on adsorbed antibodies.
- Estimated 2.6–3 molecules of IOT4a antibody per nanoparticle.
- Observed association rates comparable to free antibodies.
Conclusions:
- IOT4a-PMM 2.1.2 nanoparticles exhibit specific binding to CD4.
- The antibody orientation and accessibility on nanoparticles are suitable for target recognition.
- These antibody-coated nanoparticles show promise as antibody-targeted pharmacophores for drug delivery.
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