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Article Dans Une Revue Analog Integrated Circuits and Signal Processing Année : 2008

Nanobiosensors based on individual olfactory receptors

Vladimir Akimov
  • Fonction : Auteur
Iryna V. Benilova
  • Fonction : Auteur
  • PersonId : 852950
Ignacio Casuso Paramo
  • Fonction : Auteur
Abdelhamid Errachid
  • Fonction : Auteur
  • PersonId : 839395
Giorgio Ferrari
  • Fonction : Auteur
Nicole Jaffrezic-Renault
Claude Martelet
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  • PersonId : 839306
Cecilia Pennetta
  • Fonction : Auteur
Mateu Pla-Roca
  • Fonction : Auteur
Santiago Rodriguez-Segui
  • Fonction : Auteur
Oscar Ruiz
  • Fonction : Auteur
Josep Samitier
  • Fonction : Auteur
  • PersonId : 839307

Résumé

The animal olfactory system represents the gold standard of biosensors, due to its ability to identify and discriminate thousands of odorant compounds with very low thresholds. Using olfactory receptors (ORs) as sensing elements instead of chemical sensors, biosensors would benefit the naturally optimized molecular recognition of odorants to develop a new generation of bioelectronic noses. The purpose of SPOT-NOSED European project was the development of nanobiosensors based on single ORs anchored between nanoelectrodes, to mimic the performances of natural olfactory system. Nanobiosensors arrays could then increase odorant sensitivity or widen the odorant detection spectrum. ORs were expressed in yeasts plasmic membrane, and their functionality tested in whole yeasts. Then, nanosomes bearing the ORs were prepared from S. cerevisiae, and Surface Plasmon Resonance was performed on nanosomes for quantitative evaluation of OR response to odorant stimulation. ORs retain full activity and discrimination power in immobilized nanosomes, thus allowing their use in the fabrication of the nanobiosensors. Nanoelectrodes were fabricated using conventional photolithography and focused ion beam milling, with sizes in adequation with the nanosomes. ORs borne by nanosomes were specifically immobilized onto conducting substrates via mixed Self Assembled Monolayers, neutravidin and specific antibody to the ORs. The process was optimized by microcontact printing, and the anchored nanovesicles visualized by Atomic Force Microscopy. A transimpedance preamplifier suited for low-noise wide-bandwidth measurements was designed to be directly connected to the nanoelectrodes. Electrochemical Impedancemetric Spectroscopy detected significant changes upon electrodes functionalization, grafting of ORs carried by nanosomes, and ORs conformational change induced by odorant binding.

Domaines

Chimie

Dates et versions

hal-02105336 , version 1 (20-04-2019)

Identifiants

Citer

Vladimir Akimov, Eleonora Alfinito, Joan Bausells, Iryna V. Benilova, Ignacio Casuso Paramo, et al.. Nanobiosensors based on individual olfactory receptors. Analog Integrated Circuits and Signal Processing, 2008, 57 (3), pp.197-203. ⟨10.1007/s10470-007-9114-0⟩. ⟨hal-02105336⟩
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