Correction: Evidence for inhibition of cholinesterases in insect and mammalian nervous systems by the insect repellent deet

  • Vincent Corbel1, 3Email author,

    Affiliated with

    • Maria Stankiewicz2,

      Affiliated with

      • Cédric Pennetier1, 4,

        Affiliated with

        • Didier Fournier5,

          Affiliated with

          • Jure Stojan6,

            Affiliated with

            • Emmanuelle Girard7,

              Affiliated with

              • Mitko Dimitrov5,

                Affiliated with

                • Jordi Molgó7,

                  Affiliated with

                  • Jean-Marc Hougard3 and

                    Affiliated with

                    • Bruno Lapied4

                      Affiliated with

                      BMC Biology201210:86

                      DOI: 10.1186/1741-7007-10-86

                      Received: 3 October 2012

                      Accepted: 31 October 2012

                      Published: 31 October 2012

                      Correction

                      After the publication of this work [1] it was brought to our attention that there were insufficient details given on the final composition of the experimental and control samples used in some experiments in this study. We would like to clarify that the statement made in the methods, "Final dilutions in physiological saline contained at most 0.1% DMSO and absolute ethanol" applies to the electrophysiological experiments done on insect preparations, but not to those on mammalian preparations. Note that 0.1% DMSO has no effect on insect synaptic transmission. We supply all previously missing details in this correction.

                      For the experiment recording endplate potentials in a mouse hemidiaphragm preparation (Figure two d), in which 500 μM deet was applied, the final concentration of DMSO was 5% in both the sample treated with deet and the control (traces 1 and 2, Figure two d). For the experiment looking at the interaction between DEET and the insecticide neostigmine on a mouse hemidiaphragm preparation (Figure four d and e), the concentration of DMSO was 5% in both control samples and those bathed in 500 μM deet.

                      For the experiment looking at the effects of deet and propoxur on cockroach synaptic activity (Figure four c), deet and propoxur were prepared in dimethylsulfoxide (DMSO, stock solution 10 mM) and absolute ethanol (stock solution 10 mM), respectively, and diluted in normal cockroach saline to give 0.5 μM deet (D1), 1 μM deet (D2) and 0.2 μM propoxur (P) in the experimental samples, whereas control samples were maintained in normal cockroach saline alone. Final dilutions in physiological saline contained at most 0.1% DMSO and absolute ethanol. These concentrations of solvents had no effect on synaptic transmission.

                      We would also like to clarify that for the biochemical experiments in Figure three, the deet was diluted from a 2 M stock solution in absolute ethanol, so that for the maximum concentration of deet used (20 mM, Figure three d), the concentration of ethanol was 1%. Control samples did not contain ethanol, but we have found in other experiments that 1% ethanol has no effect on the kinetics of several acetylcholinesterases (see [2]).

                      Authors’ Affiliations

                      (1)
                      Laboratoire de Lutte contre les Insectes Nuisibles, Institut de Recherche pour le Développement
                      (2)
                      Institute of General & Molecular Biology, N. Copernicus University
                      (3)
                      Institut de Recherche pour le Développement/Centre de Recherches Entomologiques de Cotonou
                      (4)
                      Laboratoire Récepteurs et Canaux Ioniques Membranaires (RCIM), UPRES EA 2647/USC INRA 2023, IFR 149 QUASAV, Université d’Angers, UFR Sciences
                      (5)
                      Groupe de Biotechnologie des protéines, Université de Toulouse
                      (6)
                      Institute of Biochemistry, Medical Faculty, University of Ljubljana
                      (7)
                      Laboratoire de Neurobiologie Cellulaire et Moléculaire - UPR9040, CNRS, Institut de Neurobiologie Alfred Fessard - FRC2118

                      References

                      1. Corbel V, Stankiewicz M, Pennetier C, Fournier D, Stojan J, Girard E, Dimitrov M, Molgo J, Hougard JM, Lapied B: Evidence for inhibition of cholinesterases in insect and mammalian nervous systems by the insect repellent deet. BMC Biol 2009, 7:47.PubMedView Article
                      2. Fekonja O, Zorec-Karlovsek M, El Kharbili M, Fournier D, Stojan J: Inhibition and protection of cholinesterases by methanol and ethanol. J Enzyme Inhib Med Chem 2007,22(4):407–415.PubMedView Article

                      Copyright

                      © Corbel et al; licensee BioMed Central Ltd. 2012

                      This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://​creativecommons.​org/​licenses/​by/​2.​0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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