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Updated: Jun 26, 2026
Real Time Measurements of Membrane Protein:Receptor Interactions Using Surface Plasmon Resonance (SPR)
Published on: November 29, 2014
Use of a surface plasmon resonance method to investigate antibiotic and plasma protein interactions
Françoise Banères-Roquet1, Maxime Gualtieri, Philippe Villain-Guillot
1CNRS-CPBS/UMR 5236, Faculté de Pharamcie, Montpellier Cedex 5, France. Jean-Paul.Leonetti@univ-montpl.fr
Abstract:
The pharmacologic effect of an antibiotic is directly related to its unbound concentration at the site of infection. Most commercial antibiotics have been selected in part for their low propensity to interact with serum proteins. These nonspecific interactions are classically evaluated by measuring the MIC in the presence of serum. As higher-throughput technologies tend to lose information, surface plasmon resonance (SPR) is emerging as an informative medium-throughput technology for hit validation. Here we show that SPR is a useful automatic tool for quantification of the interaction of model antibiotics with serum proteins and that it delivers precise real-time kinetic data on this critical parameter.
Insights
Surface plasmon resonance (SPR) precisely quantifies how antibiotics bind to serum proteins. This method offers valuable real-time kinetic data for drug development and understanding antibiotic efficacy.
Area of Science:
- Pharmacology
- Biochemistry
- Analytical Chemistry
Background:
- Antibiotic efficacy depends on unbound drug concentration at infection sites.
- Interactions with serum proteins can reduce the effective concentration of antibiotics.
- Traditional methods for evaluating these interactions, like MIC testing in serum, can be limited.
Purpose of the Study:
- To evaluate Surface Plasmon Resonance (SPR) as a tool for quantifying antibiotic-serum protein interactions.
- To demonstrate SPR's ability to provide real-time kinetic data on these interactions.
Main Methods:
- Utilized Surface Plasmon Resonance (SPR) technology.
- Employed model antibiotics and serum proteins.
- Quantified the real-time kinetics of antibiotic-serum protein binding.
Main Results:
- SPR accurately quantified the interaction between model antibiotics and serum proteins.
- SPR provided precise, real-time kinetic data on these critical binding events.
- SPR emerged as a useful medium-throughput technology for hit validation.
Conclusions:
- Surface Plasmon Resonance (SPR) is an effective automated tool for measuring antibiotic-serum protein interactions.
- SPR offers valuable kinetic insights crucial for understanding and optimizing antibiotic pharmacologic effects.
- SPR is a promising technology for drug development and validation processes.
