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Duong NM, Noclain A, Reichel VE, de Cordovez P, Di Meglio JM, Hersen P, Charron G. A new look at an old classic: implementation of a SERS-based water hardness titration. Analyst 2023. [PMID: 37417475 DOI: 10.1039/d3an00189j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
The routine use of SERS as an analytical technique has been hindered by practical considerations among which the irreproducibility of its signals and the lack of robustness of its calibration. In the present work, we examine a strategy to perform quantitative SERS without the need for calibration. The method reinvests a colorimetric volumetric titration procedure to determine water hardness but involves monitoring the progression of the titration through the SERS signal of a complexometric indicator. Upon reaching the equivalence between the chelating titrant and the metal analytes, the SERS signal abruptly jumps, which conveniently serves as an end-point marker. Three mineral waters spanning divalent metal concentrations varying by a factor of 25 were successfully titrated in this way, with satisfactory accuracy. Remarkably, the developed procedure can be run in less than an hour, without laboratory-grade carrying capacity and would be relevant for field measurements.
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Affiliation(s)
- Ngoc Mai Duong
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75013, Paris, France
| | - Angélina Noclain
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75013, Paris, France
| | - Victoria E Reichel
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75013, Paris, France
| | - Pierre de Cordovez
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75013, Paris, France
| | - Jean-Marc Di Meglio
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75013, Paris, France
| | - Pascal Hersen
- Laboratoire Physico Chimie Curie, UMR 168, Institut Curie, Université PSL, Sorbonne Université, CNRS, 75005 Paris, France
| | - Gaëlle Charron
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75013, Paris, France
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2
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Souchaud A, Boutillon A, Charron G, Asnacios A, Noûs C, David NB, Graner F, Gallet F. Live 3D imaging and mapping of shear stresses within tissues using incompressible elastic beads. Development 2022; 149:274481. [DOI: 10.1242/dev.199765] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 12/17/2021] [Indexed: 12/30/2022]
Abstract
ABSTRACT
To investigate the role of mechanical constraints in morphogenesis and development, we have developed a pipeline of techniques based on incompressible elastic sensors. These techniques combine the advantages of incompressible liquid droplets, which have been used as precise in situ shear stress sensors, and of elastic compressible beads, which are easier to tune and to use. Droplets of a polydimethylsiloxane mix, made fluorescent through specific covalent binding to a rhodamin dye, are produced by a microfluidics device. The elastomer rigidity after polymerization is adjusted to the tissue rigidity. Its mechanical properties are carefully calibrated in situ, for a sensor embedded in a cell aggregate submitted to uniaxial compression. The local shear stress tensor is retrieved from the sensor shape, accurately reconstructed through an active contour method. In vitro, within cell aggregates, and in vivo, in the prechordal plate of the zebrafish embryo during gastrulation, our pipeline of techniques demonstrates its efficiency to directly measure the three dimensional shear stress repartition within a tissue.
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Affiliation(s)
- Alexandre Souchaud
- Matière et Systèmes Complexes, UMR 7057 associée au CNRS et à l'Université de Paris, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
| | - Arthur Boutillon
- Laboratory for Optics and Biosciences, Ecole Polytechnique, CNRS, INSERM, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - Gaëlle Charron
- Matière et Systèmes Complexes, UMR 7057 associée au CNRS et à l'Université de Paris, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
| | - Atef Asnacios
- Matière et Systèmes Complexes, UMR 7057 associée au CNRS et à l'Université de Paris, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
| | - Camille Noûs
- Laboratory Cogitamus, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
| | - Nicolas B. David
- Laboratory for Optics and Biosciences, Ecole Polytechnique, CNRS, INSERM, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - François Graner
- Matière et Systèmes Complexes, UMR 7057 associée au CNRS et à l'Université de Paris, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
| | - François Gallet
- Matière et Systèmes Complexes, UMR 7057 associée au CNRS et à l'Université de Paris, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
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Marsit S, Hénault M, Charron G, Fijarczyk A, Landry CR. The neutral rate of whole-genome duplication varies among yeast species and their hybrids. Nat Commun 2021; 12:3126. [PMID: 34035259 PMCID: PMC8149824 DOI: 10.1038/s41467-021-23231-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 04/19/2021] [Indexed: 11/09/2022] Open
Abstract
Hybridization and polyploidization are powerful mechanisms of speciation. Hybrid speciation often coincides with whole-genome duplication (WGD) in eukaryotes. This suggests that WGD may allow hybrids to thrive by increasing fitness, restoring fertility and/or increasing access to adaptive mutations. Alternatively, it has been suggested that hybridization itself may trigger WGD. Testing these models requires quantifying the rate of WGD in hybrids without the confounding effect of natural selection. Here we show, by measuring the spontaneous rate of WGD of more than 1300 yeast crosses evolved under relaxed selection, that some genotypes or combinations of genotypes are more prone to WGD, including some hybrids between closely related species. We also find that higher WGD rate correlates with higher genomic instability and that WGD increases fertility and genetic variability. These results provide evidence that hybridization itself can promote WGD, which in turn facilitates the evolution of hybrids.
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Affiliation(s)
- S Marsit
- Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, QC, Canada.
- Regroupement Québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines, (PROTEO), Université Laval, Québec, QC, Canada.
- Département de Biologie, Université Laval, Québec, QC, Canada.
- Département de biochimie, microbiologie et bio-informatique, Université Laval, Québec, QC, Canada.
| | - M Hénault
- Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, QC, Canada
- Regroupement Québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines, (PROTEO), Université Laval, Québec, QC, Canada
- Département de Biologie, Université Laval, Québec, QC, Canada
- Département de biochimie, microbiologie et bio-informatique, Université Laval, Québec, QC, Canada
| | - G Charron
- Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, QC, Canada
- Regroupement Québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines, (PROTEO), Université Laval, Québec, QC, Canada
- Département de Biologie, Université Laval, Québec, QC, Canada
| | - A Fijarczyk
- Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, QC, Canada
- Regroupement Québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines, (PROTEO), Université Laval, Québec, QC, Canada
- Département de Biologie, Université Laval, Québec, QC, Canada
- Département de biochimie, microbiologie et bio-informatique, Université Laval, Québec, QC, Canada
| | - C R Landry
- Institut de Biologie Intégrative et des Systèmes, Université Laval, Québec, QC, Canada.
- Regroupement Québécois de Recherche sur la Fonction, l'Ingénierie et les Applications des Protéines, (PROTEO), Université Laval, Québec, QC, Canada.
- Département de Biologie, Université Laval, Québec, QC, Canada.
- Département de biochimie, microbiologie et bio-informatique, Université Laval, Québec, QC, Canada.
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Carboni A, Gelabert A, Charron G, Faucher S, Lespes G, Sivry Y, Benedetti MF. Mobility and transformation of CdSe/ZnS quantum dots in soil: Role of the capping ligands and ageing effect. Chemosphere 2020; 254:126868. [PMID: 32348924 DOI: 10.1016/j.chemosphere.2020.126868] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 04/03/2020] [Accepted: 04/20/2020] [Indexed: 06/11/2023]
Abstract
The increasing application of Quantum Dots (QDs) is cause of concern for the potential negative effects for the ecosystem, especially in soils that may act as a sink. In this study, soil leaching experiments were performed in quartz sand packed columns to investigate the behavior of core-shell CdSe/ZnS QDs coated with either small ligands (TGA-QDs) or more complex polymers (POAMA-QDs). Fluorescence emission was compared to mass spectrometric measurements to assess the nanoparticles (NPs) state in both the leachate (transported species) and porous media (deposited amounts). Although both QDs were strongly retained in the column, large differences were observed depending on their capping ligand stability. Specifically, for TGA-QDs elution was negligible and the retained fraction accumulated in the top-columns. Furthermore, 74% of the NPs were degraded and 38% of the Se was found in the leachate in non-NPs state. Conversely, POAMA-QDs were recovered to a larger extent (78.1%), and displayed a higher transport along the soil profile. Further experiments with altered NPs showed that homo-aggregation of the QDs prior injection determined a reduced mobility but no significant changes in their stability. Eventually, ageing of the NPs in the column (15 days) caused the disruption of up to 92% of the original QDs and the immobilization of NPs and metals. These results indicate that QDs will accumulate in top-soils, where transformations phenomena will determine the overall transport, persistency and degradation of these chemicals. Once accumulated, they may act as a source for potentially toxic Cd and Se metal species displaying enhanced mobility.
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Affiliation(s)
- A Carboni
- Université de Paris, Institut de Physique du Globe de Paris, UMR 7154, CNRS, F-75005, Paris, France; Centre de Recherche et d'Enseignement de Géosciences de l'Environnement, Technopole Environnement Arbois-Mediterranee, BP80, 13545, Aix-en-Provence Cedex 04, Aix-en-Provence, France.
| | - A Gelabert
- Université de Paris, Institut de Physique du Globe de Paris, UMR 7154, CNRS, F-75005, Paris, France
| | - G Charron
- Laboratoire Matière et Systèmes Complexes (MSC), Univ. Paris Diderot, 75013, Paris, France
| | - S Faucher
- Université de Pau et des Pays de l'Adour, CNRS, Institut des Sciences Analytiques et de Physico Chimie pour l'Environnement et les Matériaux (IPREM), UMR 5254, Helioparc, 2 Avenue Pierre Angot, 64053, Pau, France
| | - G Lespes
- Université de Pau et des Pays de l'Adour, CNRS, Institut des Sciences Analytiques et de Physico Chimie pour l'Environnement et les Matériaux (IPREM), UMR 5254, Helioparc, 2 Avenue Pierre Angot, 64053, Pau, France
| | - Y Sivry
- Université de Paris, Institut de Physique du Globe de Paris, UMR 7154, CNRS, F-75005, Paris, France
| | - M F Benedetti
- Université de Paris, Institut de Physique du Globe de Paris, UMR 7154, CNRS, F-75005, Paris, France
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Bell SEJ, Charron G, Cortés E, Kneipp J, Lamy de la Chapelle M, Langer J, Procházka M, Tran V, Schlücker S. Auf dem Weg zur verlässlichen und quantitativen SERS‐Spektroskopie: von Schlüsselparametern zur guten analytischen Praxis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201908154] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Steven E. J. Bell
- School of Chemistry and Chemical Engineering Queen's University Belfast BT9 5AG Großbritannien
| | - Gaëlle Charron
- Laboratoire MSC Université Paris-Diderot 75013 Paris Frankreich
| | - Emiliano Cortés
- Lehrstuhl für hybride Nanosysteme Nano-Institut München Fakultät für Physik Ludwig-Maximilians-Universität München 80539 München Deutschland
| | - Janina Kneipp
- Institut für Chemie Humboldt-Universität zu Berlin 12489 Berlin Deutschland
| | - Marc Lamy de la Chapelle
- IMMM – UMR 6283 CNRS Le Mans Université Avenue Olivier Messiaen 72085 Le Mans, Cedex 9 Frankreich
| | - Judith Langer
- CIC biomaGUNE und CIBER-BBN Paseo de Miramón 182 20014 Donostia-San Sebastian Spanien
| | - Marek Procházka
- Institut für Physik, Fakultät für Mathematik und Physik Karls-Universität Ke Karlovu 5 121 16 Prague 2 Czech Republic
| | - Vi Tran
- Fakultät für Chemie und CENIDE Universität Duisburg-Essen 45141 Essen Deutschland
| | - Sebastian Schlücker
- Fakultät für Chemie und CENIDE Universität Duisburg-Essen 45141 Essen Deutschland
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6
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Bell SEJ, Charron G, Cortés E, Kneipp J, de la Chapelle ML, Langer J, Procházka M, Tran V, Schlücker S. Towards Reliable and Quantitative Surface-Enhanced Raman Scattering (SERS): From Key Parameters to Good Analytical Practice. Angew Chem Int Ed Engl 2020; 59:5454-5462. [PMID: 31588641 PMCID: PMC7154527 DOI: 10.1002/anie.201908154] [Citation(s) in RCA: 202] [Impact Index Per Article: 50.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 09/11/2019] [Indexed: 01/15/2023]
Abstract
Experimental results obtained in different laboratories world-wide by researchers using surface-enhanced Raman scattering (SERS) can differ significantly. We, an international team of scientists with long-standing expertise in SERS, address this issue from our perspective by presenting considerations on reliable and quantitative SERS. The central idea of this joint effort is to highlight key parameters and pitfalls that are often encountered in the literature. To that end, we provide here a series of recommendations on: a) the characterization of solid and colloidal SERS substrates by correlative electron and optical microscopy and spectroscopy, b) on the determination of the SERS enhancement factor (EF), including suitable Raman reporter/probe molecules, and finally on c) good analytical practice. We hope that both newcomers and specialists will benefit from these recommendations to increase the inter-laboratory comparability of experimental SERS results and further establish SERS as an analytical tool.
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Affiliation(s)
- Steven E J Bell
- School of Chemistry and Chemical Engineering, Queen's University, Belfast, BT9 5AG, UK
| | - Gaëlle Charron
- Laboratoire MSC, Université Paris-Diderot, 75013, Paris, France
| | - Emiliano Cortés
- Chair in Hybrid Nano-systems, Nano-institute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539, Munich, Germany
| | - Janina Kneipp
- Department of Chemistry, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
| | - Marc Lamy de la Chapelle
- IMMM-UMR 6283 CNRS, Le Mans Université, Avenue Olivier Messiaen, 72085, Le Mans, Cedex 9, France
| | - Judith Langer
- CIC biomaGUNE and CIBER-BBN, Paseo de Miramón 182, 20014, Donostia-San Sebastian, Spain
| | - Marek Procházka
- Institute of Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16, Prague 2, Czech Republic
| | - Vi Tran
- Department of Chemistry and CENIDE, University of Duisburg-Essen, 45141, Essen, Germany
| | - Sebastian Schlücker
- Department of Chemistry and CENIDE, University of Duisburg-Essen, 45141, Essen, Germany
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Supiandi NI, Charron G, Tharaud M, Benedetti MF, Sivry Y. Tracing multi-isotopically labelled CdSe/ZnS quantum dots in biological media. Sci Rep 2020; 10:2866. [PMID: 32071375 PMCID: PMC7028726 DOI: 10.1038/s41598-020-59206-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 01/27/2020] [Indexed: 11/30/2022] Open
Abstract
The strengths and limits of isotopically labelled Engineered Nanoparticles (spiked ENPs) spread in biological media have been assessed. Multi-spiked CdSe/ZnS quantum dots (QDs), measuring 7 nm and coated with thioglycolic acid (TGA), were synthesized and enriched in 68Zn, 77Se and 111Cd. These QDs were dispersed at very low concentrations (0.1 to 5000 ppt) in diverse biological matrices (synthetic saliva, synthetic urine, plasma and Dulbecco's phosphate buffered saline - DPBS growth medium) and the isotopic compositions were determined by HR-ICP-MS. The initial QDs concentrations were calculated to assess the limit of quantification (QD-LOQ) according to the matrix and the isotopically enriched element. The obtained results demonstrated the advantages of the isotopic labelling method in order to work at very low concentrations: the QD-LOQ values for the spiked Zn, Cd and Se originated from the QDs were 10, 0.3 and 6 ppt, respectively, which is below the conventional LOQ of the HR-ICP-MS used (30, 3 and 60 ppt for Zn, Cd and Se, respectively). Conversely, in complex matrices such as saliva, urine, plasma and DPBS growth medium, the QD-LOQ values increased significantly, with values ranging from 16 to 32 ppt for Cd, 446 to 10598 ppt for Zn and 1618 to 8317 ppt for Se. These QD-LOQs are dependent on factors as the elemental background concentration already present in the matrices, and the dilution factor. In this study, the QD-LOQs are expressed for the first time with respect to the background concentration in biological media (QD-RLOQ), which can be used to better assess and then predict the efficiency of the spiking method.
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Affiliation(s)
- N Izyan Supiandi
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Univ. Paris Diderot, UMR 7154, CNRS, F-7, 5005, Paris, France
| | - G Charron
- Laboratoire Matière et Systèmes Complexes (MSC), Université Paris Diderot, 75013, Paris, France
| | - M Tharaud
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Univ. Paris Diderot, UMR 7154, CNRS, F-7, 5005, Paris, France
| | - M F Benedetti
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Univ. Paris Diderot, UMR 7154, CNRS, F-7, 5005, Paris, France
| | - Y Sivry
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Univ. Paris Diderot, UMR 7154, CNRS, F-7, 5005, Paris, France.
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Brackx G, Guinoiseau D, Duponchel L, Gélabert A, Reichel V, Zrig S, Meglio JMD, Benedetti MF, Gaillardet J, Charron G. A frugal implementation of Surface Enhanced Raman Scattering for sensing Zn 2+ in freshwaters - In depth investigation of the analytical performances. Sci Rep 2020; 10:1883. [PMID: 32024904 PMCID: PMC7002737 DOI: 10.1038/s41598-020-58647-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 01/13/2020] [Indexed: 11/09/2022] Open
Abstract
Surface Enhanced Raman Scattering (SERS) has been widely praised for its extreme sensitivity but has not so far been put to use in routine analytical applications, with the accessible scale of measurements a limiting factor. We report here on a frugal implementation of SERS dedicated to the quantitative detection of Zn2+ in water, Zn being an element that can serve as an indicator of contamination by heavy metals in aquatic bodies. The method consists in randomly aggregating simple silver colloids in the analyte solution in the presence of a complexometric indicator of Zn2+, recording the SERS spectrum with a portable Raman spectrometer and analysing the data using multivariate calibration models. The frugality of the sensing procedure enables us to acquire a dataset much larger than conventionally done in the field of SERS, which in turn allows for an in-depth statistical analysis of the analytical performances that matter to end-users. In pure water, the proposed sensor is sensitive and accurate in the 160-2230 nM range, with a trueness of 96% and a precision of 4%. Although its limit of detection is one order of magnitude higher than those of golden standard techniques for quantifying metals, its sensitivity range matches Zn levels that are relevant to the health of aquatic bodies. Moreover, its frugality positions it as an interesting alternative to monitor water quality. Critically, the combination of the simple procedure for sample preparation, abundant SERS material and affordable portable instrument paves the way for a realistic deployment to the water site, with each Zn reading three to five times cheaper than through conventional techniques. It could therefore complement current monitoring methods in a bid to solve the pressing needs for large scale water quality data.
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Affiliation(s)
- Gwennhaël Brackx
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Diderot, Sorbonne Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205, Paris, cedex 13, France
| | - Damien Guinoiseau
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, CNRS UMR 7154, 1 rue Jussieu, 75005, Paris, France
| | - Ludovic Duponchel
- LASIR CNRS UMR 8516, Université de Lille, Sciences et Technologies, 59655, Villeneuve d'Ascq Cedex, France
| | - Alexandre Gélabert
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, CNRS UMR 7154, 1 rue Jussieu, 75005, Paris, France
| | - Victoria Reichel
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Diderot, Sorbonne Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205, Paris, cedex 13, France
| | - Samia Zrig
- ITODYS, UMR 7086, Université Paris Diderot, Sorbonne Paris Cité, CNRS, 15 rue J-A de Baïf, 75205, Paris, cedex 13, France
| | - Jean-Marc Di Meglio
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Diderot, Sorbonne Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205, Paris, cedex 13, France
| | - Marc F Benedetti
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, CNRS UMR 7154, 1 rue Jussieu, 75005, Paris, France
| | - Jérôme Gaillardet
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité, CNRS UMR 7154, 1 rue Jussieu, 75005, Paris, France
| | - Gaëlle Charron
- Laboratoire Matière et Systèmes Complexes, UMR 7057, Université Paris Diderot, Sorbonne Paris Cité, CNRS, 10 rue Alice Domon et Léonie Duquet, 75205, Paris, cedex 13, France.
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Supiandi NI, Charron G, Tharaud M, Cordier L, Guigner JM, Benedetti MF, Sivry Y. Isotopically Labeled Nanoparticles at Relevant Concentrations: How Low Can We Go? The Case of CdSe/ZnS QDs in Surface Waters. Environ Sci Technol 2019; 53:2586-2594. [PMID: 30703329 DOI: 10.1021/acs.est.8b04096] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Analytical barriers impose work at nanoparticles (NPs) concentrations orders of magnitude higher than the expected NPs concentrations in the environment. To overcome these limitations, the use of nontraditional stable isotope tracers incorporated in NPs (spiked-NPs) coupled with HR-ICP-MS has been proposed. The performance and efficiency of this analytical method was assessed in the case of quantum dots (QDs). Multi-isotopically labeled 111Cd77Se/68ZnS QDs were synthesized and their dissemination in natural aquatic matrices (river, estuarine and sea waters) was modeled at very low concentrations (from 0.1 to 5000 ppt). The QD limits of quantification (QD-LOQ) in each matrix were calculated according to the isotopic tracer. In ultrapure and simple medium (HNO3 2%), Zn, Cd, and Se originated from the QDs were quantifiable at concentrations of 10, 0.3, and 6 ppt, respectively, which are lower than the conventional HR-ICP-MS LOQs. In aquatic matrices, the QD-LOQs increase 10-, 130-, and 250-fold for Zn, Cd, and Se, respectively, but remain relevant of environmental concentrations (3.4 ppt ≤ QD-LOQs ≤ 2.5 ppb). These results validate the use of isotopically labeled ENPs at relevant concentrations in experimental studies related to either their fate, behavior, or toxicity in most aquatic matrices.
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Affiliation(s)
- Nurul I Supiandi
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité , Université Paris Diderot , UMR 7154, CNRS , F-75005 Paris , France
| | - G Charron
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 , Université Paris Diderot , Sorbonne Paris Cité , 75013 Paris , France
| | - M Tharaud
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité , Université Paris Diderot , UMR 7154, CNRS , F-75005 Paris , France
| | - L Cordier
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité , Université Paris Diderot , UMR 7154, CNRS , F-75005 Paris , France
| | - J-M Guigner
- Institut de Minéralogie , de Physique des Matériaux et de Cosmochimie (IMPMC) , 75005 Paris , France
| | - M F Benedetti
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité , Université Paris Diderot , UMR 7154, CNRS , F-75005 Paris , France
| | - Y Sivry
- Institut de Physique du Globe de Paris, Sorbonne Paris Cité , Université Paris Diderot , UMR 7154, CNRS , F-75005 Paris , France
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Volatron J, Carn F, Kolosnjaj-Tabi J, Javed Y, Vuong QL, Gossuin Y, Ménager C, Luciani N, Charron G, Hémadi M, Alloyeau D, Gazeau F. Ferritin Protein Regulates the Degradation of Iron Oxide Nanoparticles. Small 2017; 13:1602030. [PMID: 28060465 DOI: 10.1002/smll.201602030] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 09/23/2016] [Indexed: 06/06/2023]
Abstract
Proteins implicated in iron homeostasis are assumed to be also involved in the cellular processing of iron oxide nanoparticles. In this work, the role of an endogenous iron storage protein-namely the ferritin-is examined in the remediation and biodegradation of magnetic iron oxide nanoparticles. Previous in vivo studies suggest the intracellular transfer of the iron ions released during the degradation of nanoparticles to endogenous protein cages within lysosomal compartments. Here, the capacity of ferritin cages to accommodate and store the degradation products of nanoparticles is investigated in vitro in the physiological acidic environment of the lysosomes. Moreover, it is questioned whether ferritin proteins can play an active role in the degradation of the nanoparticles. The magnetic, colloidal, and structural follow-up of iron oxide nanoparticles and proteins in lysosome-like medium confirms the efficient remediation of potentially harmful iron ions generated by nanoparticles within ferritins. The presence of ferritins, however, delays the degradation of particles due to a complex colloidal behavior of the mixture in acidic medium. This study exemplifies the important implications of intracellular proteins in processes of degradation and metabolization of iron oxide nanoparticles.
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Affiliation(s)
- Jeanne Volatron
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205, Paris Cedex 13, France
| | - Florent Carn
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205, Paris Cedex 13, France
| | - Jelena Kolosnjaj-Tabi
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205, Paris Cedex 13, France
| | - Yasir Javed
- Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205, Paris Cedex 13, France
- Department of Physics, University of Agriculture, Faisalabad, Pakistan
| | - Quoc Lam Vuong
- Service de Physique Biomédicale, Université de Mons, 20 Place du Parc, 7000, Mons, Belgium
| | - Yves Gossuin
- Service de Physique Biomédicale, Université de Mons, 20 Place du Parc, 7000, Mons, Belgium
| | - Christine Ménager
- Laboratoire PHENIX, UMR 7195, CNRS/Université Pierre et Marie Curie/ESPCI, 4 place Jussieu, 75252, Paris Cedex 05, France
| | - Nathalie Luciani
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205, Paris Cedex 13, France
| | - Gaëlle Charron
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205, Paris Cedex 13, France
| | - Miryana Hémadi
- ITODYS, Interfaces, Traitements, Organisation et Dynamique des Systèmes, UMR 7086 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, 75205, Paris Cedex 13, France
| | - Damien Alloyeau
- Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205, Paris Cedex 13, France
| | - Florence Gazeau
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS/Université Paris Diderot, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205, Paris Cedex 13, France
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11
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Charron G, Malkin E, Rogez G, Batchelor LJ, Mazerat S, Guillot R, Guihéry N, Barra AL, Mallah T, Bolvin H. Unraveling σ and π Effects on Magnetic Anisotropy incis-NiA4B2Complexes: Magnetization, HF-HFEPR Studies, First-Principles Calculations, and Orbital Modeling. Chemistry 2016; 22:16850-16862. [DOI: 10.1002/chem.201602837] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Gaëlle Charron
- Institut de Chimie Moléculaire et des Matériaux d'Orsay; CNRS; Université de Paris-Sud 11; 91405 Orsay Cedex France
- Laboratoire MSC; Université Paris 7 Diderot; Paris France
| | - Elena Malkin
- Laboratoire de Chimie et Physique Quantiques; CNRS; Université Toulouse III; 118 route de Narbonne 31062 Toulouse France
- CTCC; Department of Chemistry; University of Tromsø; 9037 Tromsø Norway
| | - Guillaume Rogez
- Institut de Physique et Chimie des Matériaux de Strasbourg; Université de Strasbourg; 23 rue du Loess, BP 43 67034 Strasbourg Cedex 2 France
| | - Luke J. Batchelor
- Institut de Chimie Moléculaire et des Matériaux d'Orsay; CNRS; Université de Paris-Sud 11; 91405 Orsay Cedex France
| | - Sandra Mazerat
- Institut de Chimie Moléculaire et des Matériaux d'Orsay; CNRS; Université de Paris-Sud 11; 91405 Orsay Cedex France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay; CNRS; Université de Paris-Sud 11; 91405 Orsay Cedex France
| | - Nathalie Guihéry
- Laboratoire de Chimie et Physique Quantiques; CNRS; Université Toulouse III; 118 route de Narbonne 31062 Toulouse France
| | - Anne-Laure Barra
- Laboratoire National des Champs Magnétiques Intenses; CNRS; 25 rue des Martyrs, B.P. 166 38042 Grenoble Cedex 9 France
| | - Talal Mallah
- Institut de Chimie Moléculaire et des Matériaux d'Orsay; CNRS; Université de Paris-Sud 11; 91405 Orsay Cedex France
| | - Hélène Bolvin
- Laboratoire de Chimie et Physique Quantiques; CNRS; Université Toulouse III; 118 route de Narbonne 31062 Toulouse France
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12
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Nguyen N, Charron G, Roberge D. Blinded Evaluation of Sinogram Affirmed Iterative Reconstruction in Radiation Therapy Planning Images. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Auger T, Mathé J, Viasnoff V, Charron G, Di Meglio JM, Auvray L, Montel F. Zero-mode waveguide detection of flow-driven DNA translocation through nanopores. Phys Rev Lett 2014; 113:028302. [PMID: 25062242 DOI: 10.1103/physrevlett.113.028302] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Indexed: 06/03/2023]
Abstract
We directly measure the flow-driven injection of DNA through nanopores at the level of single molecule and single pore using a modified zero-mode waveguide method. We observe a flow threshold independent of the pore radius, the DNA concentration, and length. We demonstrate that the flow injection of DNA in nanopores is controlled by an energy barrier as proposed in the de Gennes-Brochard suction model. Finally, we show that the height of the energy barrier is modulated by functionalizing the nanopores.
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Affiliation(s)
- Thomas Auger
- Matiére et Systèmes Complexes, Université Paris Diderot & CNRS (UMR 7057), 75205 Paris Cedex 13, France
| | - Jérôme Mathé
- Laboratoire d'Analyse et de Modélisation pour la Biologie et l'Environnement, Université Évry-Val d'Essonne & CNRS (UMR 8587), 91025 Évry Cedex, France
| | - Virgile Viasnoff
- Mechanobiology Institute, National University of Singapore & CNRS (UMI 3639), 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Gaëlle Charron
- Matiére et Systèmes Complexes, Université Paris Diderot & CNRS (UMR 7057), 75205 Paris Cedex 13, France
| | - Jean-Marc Di Meglio
- Matiére et Systèmes Complexes, Université Paris Diderot & CNRS (UMR 7057), 75205 Paris Cedex 13, France
| | - Loïc Auvray
- Matiére et Systèmes Complexes, Université Paris Diderot & CNRS (UMR 7057), 75205 Paris Cedex 13, France
| | - Fabien Montel
- Matiére et Systèmes Complexes, Université Paris Diderot & CNRS (UMR 7057), 75205 Paris Cedex 13, France
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14
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Pelaz B, Charron G, Pfeiffer C, Zhao Y, de la Fuente JM, Liang XJ, Parak WJ, Del Pino P. Interfacing engineered nanoparticles with biological systems: anticipating adverse nano-bio interactions. Small 2013; 9:1573-84. [PMID: 23112130 DOI: 10.1002/smll.201201229] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Indexed: 05/22/2023]
Abstract
The innovative use of engineered nanomaterials in medicine, be it in therapy or diagnosis, is growing dramatically. This is motivated by the current extraordinary control over the synthesis of complex nanomaterials with a variety of biological functions (e.g. contrast agents, drug-delivery systems, transducers, amplifiers, etc.). Engineered nanomaterials are found in the bio-context with a variety of applications in fields such as sensing, imaging, therapy or diagnosis. As the degree of control to fabricate customized novel and/or enhanced nanomaterials evolves, often new applications, devices with enhanced performance or unprecedented sensing limits can be achieved. Of course, interfacing any novel material with biological systems has to be critically analyzed as many undesirable adverse effects can be triggered (e.g. toxicity, allergy, genotoxicity, etc.) and/or the performance of the nanomaterial can be compromised due to the unexpected phenomena in physiological environments (e.g. corrosion, aggregation, unspecific absorption of biomolecules, etc.). Despite the need for standard protocols for assessing the toxicity and bio-performance of each new functional nanomaterial, these are still scarce or currently under development. Nonetheless, nanotoxicology and relating adverse effects to the physico-chemical properties of nanomaterials are emerging areas of the utmost importance which have to be continuously revisited as any new material emerges. This review highlights recent progress concerning the interaction of nanomaterials with biological systems and following adverse effects.
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Affiliation(s)
- Beatriz Pelaz
- Instituto de Nanociencia de Aragon (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain
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15
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Tinguely JC, Charron G, Lau-Truong S, Hohenau A, Grand J, Félidj N, Aubard J, Krenn JR. Template-assisted deposition of CTAB-functionalized gold nanoparticles with nanoscale resolution. J Colloid Interface Sci 2013; 394:237-42. [PMID: 23352701 DOI: 10.1016/j.jcis.2012.12.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 12/20/2012] [Accepted: 12/27/2012] [Indexed: 12/14/2022]
Abstract
In this paper, we demonstrate the template-assisted deposition of cetyltrimethylammonium bromide (CTAB) stabilized gold nanorods at lithographically defined positions on a substrate. Overcoating of the nanoparticles with polystyrenesulfonate allows to switch the original nanoparticles positive surface charge to negative and to apply the template-assisted deposition technique developed for citrate-capped gold nanoparticles also to CTAB stabilized nanoparticles. The successful, selective deposition of gold nanorods in trenches with widths down to 50 nm is demonstrated. Our results indicate the potential of this method for the fabrication of well controlled, reproducible plasmonic biosensing substrates, applicable to the vast palette of anisotropic nanoparticle shapes synthesized with CTAB as the templating agent.
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Affiliation(s)
- Jean-Claude Tinguely
- Institute of Physics, Karl-Franzens University, Universitätsplatz 5, A-8010 Graz, Austria.
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16
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Charron G, Hühn D, Perrier A, Cordier L, Pickett CJ, Nann T, Parak WJ. On the use of pH titration to quantitatively characterize colloidal nanoparticles. Langmuir 2012; 28:15141-15149. [PMID: 23075164 DOI: 10.1021/la302570s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Functional nanoparticles (NPs) for bioapplications have been achieved, thanks to synthesis providing high quality nanocrystals, efficient procedures for transfer in water, and further conjugation of (bio)active molecules. However, these nanomaterials are still subjected to batch-to-batch variability and investigations of their physicochemical properties and chemical reactivity are still in their infancy. This may be due to lack of a routine, cost-effective, and readily available quantitative method for characterizing functional NPs. In this work, we show that pH titrations can be a powerful tool for investigating the surface properties of charged NPs and quantifying their surface functionalities. We demonstrate how this method can be useful in characterizing the colloidal and chemical stability, composition, and purity of the nanomaterial. The method also shows potential for the optimization of conjugation conditions.
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Affiliation(s)
- Gaëlle Charron
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086, 15 rue J-A de Baïf, 75205 Paris Cedex 13, France.
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17
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Magadur G, Lauret JS, Charron G, Bouanis F, Norman E, Huc V, Cojocaru CS, Gómez-Coca S, Ruiz E, Mallah T. Charge Transfer and Tunable Ambipolar Effect Induced by Assembly of Cu(II) Binuclear Complexes on Carbon Nanotube Field Effect Transistor Devices. J Am Chem Soc 2012; 134:7896-901. [DOI: 10.1021/ja301362r] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gurvan Magadur
- Institut de Chimie Moléculaire
et des Matériaux d’Orsay, Université de Paris Sud 11, CNRS, Bât. 420, 15 rue Georges
Clemenceau, 91405 Orsay Cedex, France
| | - Jean-Sébastien Lauret
- Laboratoire de Photonique Quantique et Moléculaire, 61 Avenue
du Président Wilson, 94230 Cachan, France
| | - Gaëlle Charron
- Institut de Chimie Moléculaire
et des Matériaux d’Orsay, Université de Paris Sud 11, CNRS, Bât. 420, 15 rue Georges
Clemenceau, 91405 Orsay Cedex, France
| | - Fatima Bouanis
- Institut de Chimie Moléculaire
et des Matériaux d’Orsay, Université de Paris Sud 11, CNRS, Bât. 420, 15 rue Georges
Clemenceau, 91405 Orsay Cedex, France
- Laboratoire de Physique des Interfaces
et Couches Minces, Ecole Polytechnique,
F-91128 Palaiseau, France
| | - Evgeny Norman
- Laboratoire de Physique des Interfaces
et Couches Minces, Ecole Polytechnique,
F-91128 Palaiseau, France
| | - Vincent Huc
- Institut de Chimie Moléculaire
et des Matériaux d’Orsay, Université de Paris Sud 11, CNRS, Bât. 420, 15 rue Georges
Clemenceau, 91405 Orsay Cedex, France
| | - Costel-Sorin Cojocaru
- Laboratoire de Physique des Interfaces
et Couches Minces, Ecole Polytechnique,
F-91128 Palaiseau, France
| | - Silvia Gómez-Coca
- Departament de Química
Inorgànica and Institut de Recerca de Química Teòrica
i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química
Inorgànica and Institut de Recerca de Química Teòrica
i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Talal Mallah
- Institut de Chimie Moléculaire
et des Matériaux d’Orsay, Université de Paris Sud 11, CNRS, Bât. 420, 15 rue Georges
Clemenceau, 91405 Orsay Cedex, France
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Le Ru EC, Grand J, Sow I, Somerville WRC, Etchegoin PG, Treguer-Delapierre M, Charron G, Félidj N, Lévi G, Aubard J. A scheme for detecting every single target molecule with surface-enhanced Raman spectroscopy. Nano Lett 2011; 11:5013-9. [PMID: 21985399 DOI: 10.1021/nl2030344] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is now a well-established technique for the detection, under appropriate conditions, of single molecules (SM) adsorbed on metallic nanostructures. However, because of the large variations of the SERS enhancement factor on the surface, only molecules located at the positions of highest enhancement, so-called hot-spots, can be detected at the single-molecule level. As a result, in all SM-SERS studies so far only a small fraction, typically less than 1%, of molecules are actually observed. This complicates the analysis of such experiments and means that trace detection via SERS can in principle still be vastly improved. Here we propose a simple scheme, based on selective adsorption of the target analyte at the SERS hot-spots only, that allows in principle detection of every single target molecule in solution. We moreover provide a general experimental methodology, based on the comparison between average and maximum (single molecule) SERS enhancement factors, to verify the efficiency of our approach. The concepts and tools introduced in this work can readily be applied to other SERS systems aiming for detection of every single target molecule.
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Affiliation(s)
- Eric C Le Ru
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand.
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Charron G, Giusti A, Mazerat S, Mialane P, Gloter A, Miserque F, Keita B, Nadjo L, Filoramo A, Rivière E, Wernsdorfer W, Huc V, Bourgoin JP, Mallah T. Assembly of a magnetic polyoxometalate on SWNTs. Nanoscale 2010; 2:139-144. [PMID: 20648376 DOI: 10.1039/b9nr00190e] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Recently, the organisation of magnetic molecules on carbon nanotubes has raised much interest due to their possible interesting contribution to molecular spintronics. In this paper, we describe the assembly on SWNTs of a magnetic polyoxometalate encompassing a single cobalt ion (CoPOM) and its isostructural diamagnetic zinc analogue (ZnPOM). The simple magnetic behaviour of CoPOM and the availability of its diamagnetic counterpart render these POM@NTs systems interesting model compounds for the study of molecular electronics devices based on carbon nanotubes and magnetic molecules. The success and rate of the grafting have been investigated by electron microscopy, electron energy loss spectroscopy, X-ray photoelectron spectroscopy, cyclic voltammetry, Raman scattering and magnetisation measurements. These characterisations altogether demonstrate the preservation of the structural and magnetic properties of the molecules upon functionalisation and the existence of an electronic communication between the molecules and the nanotubes.
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Affiliation(s)
- Gaëlle Charron
- School of Chemical Sciences-Energy Material Lab, University of East Anglia, Norwich, UK.
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Giusti A, Charron G, Mazerat S, Compain JD, Mialane P, Dolbecq A, Rivière E, Wernsdorfer W, Ngo Biboum R, Keita B, Nadjo L, Filoramo A, Bourgoin JP, Mallah T. Magnetic Bistability of Individual Single-Molecule Magnets Grafted on Single-Wall Carbon Nanotubes. Angew Chem Int Ed Engl 2009; 48:4949-52. [DOI: 10.1002/anie.200901806] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Giusti A, Charron G, Mazerat S, Compain JD, Mialane P, Dolbecq A, Rivière E, Wernsdorfer W, Ngo Biboum R, Keita B, Nadjo L, Filoramo A, Bourgoin JP, Mallah T. Magnetic Bistability of Individual Single-Molecule Magnets Grafted on Single-Wall Carbon Nanotubes. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200901806] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Charron G, Mazerat S, Erdogan M, Gloter A, Filoramo A, Cambedouzou J, Launois P, Rivière E, Wernsdorfer W, Bourgoin JP, Mallah T. Insights into the mechanism of the gas-phase purification of HiPco SWNTs through a comprehensive multi-technique study. NEW J CHEM 2009. [DOI: 10.1039/b900373h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rebilly JN, Charron G, Rivière E, Guillot R, Barra AL, Serrano M, van Slageren J, Mallah T. Large Magnetic Anisotropy in Pentacoordinate NiII Complexes. Chemistry 2008; 14:1169-77. [DOI: 10.1002/chem.200701243] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gélinas R, Bouchard B, McDuff J, Charron G, Des Rosiers C. Metabolic alterations beyond fatty acid oxidation in PPAR alpha null mice hearts: Effect of workload and fasting. J Mol Cell Cardiol 2007. [DOI: 10.1016/j.yjmcc.2007.03.783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Charron G, Bellot F, Cisnetti F, Pelosi G, Rebilly JN, Rivière E, Barra AL, Mallah T, Policar C. Glycoligands Tuning the Magnetic Anisotropy of NiII Complexes. Chemistry 2007; 13:2774-82. [PMID: 17295363 DOI: 10.1002/chem.200601560] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two organic ligands based on a sugar-scaffold derived from galactose and possessing three O-CH(2)-pyridine pendant arms at the 3-, 4-, and 5-positions of the galactopyranose that act as chelates afford mononuclear complexes when reacted with a Ni(II) salt. The magnetization behavior in the form of M=f(H/T) plots suggests the presence of appreciable magnetic anisotropy within the two complexes. The analysis of the EPR spectra performed at two different temperatures (7 and 17 K) and at three frequencies (190, 285, and 380 GHz) leads to the conclusion that the anisotropy has a high degree of axiality (E/D=0.17 for the two complexes), but with a different sign of the D parameter. The spin hamiltonian parameters D and E were reproduced for the two complexes by using calculations based on the angular overlap model (AOM). The structural difference between the two complexes responsible of the sign of the D parameters was also determined using AOM calculations. A thorough analysis of the structures showed that the structural differences in the coordination sphere of the two complexes responsible of the different D parameter sign result from the nature of the sugar scaffolds. In complex 1, the sugar scaffold imposes an intramolecular hydrogen bond with one of the atoms linked to Ni(II); this arrangement leads to a distorted coordination sphere and positive D value, while the absence of such a hydrogen bond in complex 2 leads to a less distorted environment around the Ni center and to a negative D value.
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Affiliation(s)
- Gaëlle Charron
- ICMMO UMR CNRS 8182, Equipe Chimie Inorganique, Univ Paris Sud, 91405 Orsay, France
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27
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Rebilly JN, Catala L, Charron G, Rogez G, Rivière E, Guillot R, Thuéry P, Barra AL, Mallah T. Magnetic anisotropy of two trinuclear and tetranuclear CrIIINiIIcyanide-bridged complexes with spin ground states S = 4 and 5. Dalton Trans 2006:2818-28. [PMID: 16751890 DOI: 10.1039/b517417a] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trinuclear and the tetranuclear complexes [[iPrtacnCr(CN)3]2[Ni(cyclam)]](NO3)2.5H2O 1 (cyclam = 1,4,8,11-tetraazacyclotetradecane, iPrtacn = 1,4,7-tris-isopropyl-1,4,7-triazacyclononane) and [[iPrtacnCr(CN)3Ni(Me2bpy)2]2](ClO4)4.2CH3CN 2 (Me2bpy = 4,4-dimethyl-2,2-bipyridine) were synthesized by reacting (iPrtacn)Cr(CN)3 with [Ni(cyclam)](NO3)2 and [Ni(Me2bpy)2(H2O)2](ClO4)2, respectively. The crystallographic structure of the two compounds was solved. The molecular structure of complex 1 consists of a linear Cr-Ni-Cr arrangement with a central Ni(cyclam) unit surrounded by two Cr(iPrtacn)(CN)3 molecules through bridging cyanides. Each peripheral chromium complex has two pending CN ligands. Complex 2 has a square planar arrangement with the metal ions occupying the vertices of the square. Each Cr(iPrtacn)(CN)3 molecule has two bridging and one non-bridging cyanide ligands. The magnetic properties of the two complexes were investigated by susceptibility vs. temperature and magnetization vs. field studies. As expected from the orthogonality of the magnetic orbitals between Cr(III) (t2g3) and Ni(II) (e(g)2) metal ions, a ferromagnetic exchange interaction occurs leading to a spin ground states S = 4 and 5 for 1 and 2, respectively. The magnetization vs. field studies at T = 2, 3 and 4 K showed the presence of a magnetic anisotropy within the ground spin states leading to zero-field splitting parameters obtained by fitting the data D4 = 0.36 cm(-1) and D5 = 0.19 cm(-1) (the indices 4 and 5 refer to the ground states of complexes 1 and 2, respectively). In order to quantify precisely the magnitude of the axial (D) and the rhombic (E) anisotropy parameters, High-field high frequency electron paramagnetic resonance (HF-HFEPR) experiments were carried out. The best simulation of the experimental spectra (at 190 and 285 GHz) gave the following parameters for 1: D4 = 0.312 cm(-1), E4/D4 = 0.01, g4x = 2.003, g4y = 2.017 and g4z = 2.015. For complex 2 two sets of parameters could be extracted from the EPR spectra because a doubling of the resonances were observed and assigned to the presence of complexes with slightly different structures at low temperature: D5 = 0.154 (0.13) cm(-1), E5/D5 = 0.31 (0.31) cm(-1), g4x = 2.04 (2.05), g4y = 2.05 (2.05) and g4z = 2.03 (2.02). The knowledge of the magnetic anisotropy parameters of the mononuclear Cr(iPrtacn)(CN)3, Ni(cyclam)(NCS)2 and Ni(bpy)2(NCS)2 complexes by combining HF-HFEPR studies and calculation using a software based on the angular overlap model (AOM) allowed to determine the orientation of the local D tensors of the metal ions forming the polynuclear complexes. We, subsequently, show that the anisotropy parameters of the polynuclear complexes computed from the projection of the local tensors are in excellent agreement with the experimental ones extracted from the EPR experiments.
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Affiliation(s)
- Jean-Noël Rebilly
- ICMMO-Equipe Chimie Inorganique, CNRS UMR 8182, Université Paris-Sud, Bât 420, F-91405, Orsay, France
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Charron G, Furlan V, Bernier-Cardou M, Doyon G. Response of onion plants to arbuscular mycorrhizae : 2. Effects of nitrogen fertilization on biomass and bulb firmness. Mycorrhiza 2001. [PMID: 24595434 DOI: 10.1007/s005720100121] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The effects of N fertilization on growth and root colonization of preinoculated onion (Allium cepa L. cv. Improved Autumn Spice) were studied. Onion transplants, inoculated with either Glomus intraradices, G. versiforme or nothing at sowing, were grown under three levels of N in soils which had either been irradiated, irradiated and amended with nonmycorrhizal microflora, or not irradiated. Interactions between inoculation and soil treatment had a significant effect on dry biomass and final bulb diameter. Control plants cultivated in non-irradiated natural soil grew normally because of the presence of indigenous arbuscular mycorrhizae, but control plants in irradiated soils were stunted. There was no such difference among inoculated plants. In non-irradiated natural soil, bulbs of onions inoculated with G. intraradices or G. versiforme were significantly firmer than bulbs of control plants. Bulb firmness decreased as N fertilization level increased. In non-irradiated natural soil, tissue P concentration of onion plants preinoculated with either fungus was significantly higher than that of control plants. In all soil types, N, P, and Zn concentrations were higher in onion plants colonized by G. versiforme than in those colonized by G. intraradices. The opposite was true of Mn tissue concentration.
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Affiliation(s)
- G Charron
- DREPA, 555 boulevard Roland-Therrien, Longueuil, Québec, J4H 3Y9 Canada , Canada
| | - V Furlan
- Agriculture and Agri-Food Canada, ECORC - K.W. Neatby 2057, Central Experimental Farm, Ottawa, Ontario, K1A 0C6 Canada, Canada
| | - M Bernier-Cardou
- Natural Resources Canada, 1055 rue du P.E.P.S., C.P. 3800, Sainte-Foy, Québec, G1V 4C7 Canada, Canada
| | - G Doyon
- Food Research and Development Centre, 3600 boulevard Casavant Ouest, Saint-Hyacinthe, Québec, J2S 8E3 Canada, Canada
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Charron G, Furlan V, Bernier-Cardou M, Doyon G. Response of onion plants to arbuscular mycorrhizae : 2. Effects of nitrogen fertilization on biomass and bulb firmness. Mycorrhiza 2001; 11:145-150. [PMID: 24595434 DOI: 10.1007/s005720100122] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/30/2001] [Indexed: 06/03/2023]
Abstract
The effects of N fertilization on growth and root colonization of preinoculated onion (Allium cepa L. cv. Improved Autumn Spice) were studied. Onion transplants, inoculated with either Glomus intraradices, G. versiforme or nothing at sowing, were grown under three levels of N in soils which had either been irradiated, irradiated and amended with nonmycorrhizal microflora, or not irradiated. Interactions between inoculation and soil treatment had a significant effect on dry biomass and final bulb diameter. Control plants cultivated in non-irradiated natural soil grew normally because of the presence of indigenous arbuscular mycorrhizae, but control plants in irradiated soils were stunted. There was no such difference among inoculated plants. In non-irradiated natural soil, bulbs of onions inoculated with G. intraradices or G. versiforme were significantly firmer than bulbs of control plants. Bulb firmness decreased as N fertilization level increased. In non-irradiated natural soil, tissue P concentration of onion plants preinoculated with either fungus was significantly higher than that of control plants. In all soil types, N, P, and Zn concentrations were higher in onion plants colonized by G. versiforme than in those colonized by G. intraradices. The opposite was true of Mn tissue concentration.
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Affiliation(s)
- G Charron
- DREPA, 555 boulevard Roland-Therrien, Longueuil, Québec, J4H 3Y9 Canada , Canada
| | - V Furlan
- Agriculture and Agri-Food Canada, ECORC - K.W. Neatby 2057, Central Experimental Farm, Ottawa, Ontario, K1A 0C6 Canada, Canada
| | - M Bernier-Cardou
- Natural Resources Canada, 1055 rue du P.E.P.S., C.P. 3800, Sainte-Foy, Québec, G1V 4C7 Canada, Canada
| | - G Doyon
- Food Research and Development Centre, 3600 boulevard Casavant Ouest, Saint-Hyacinthe, Québec, J2S 8E3 Canada, Canada
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Michaud J, Fajardo R, Charron G, Sauvageau A, Berrada F, Ramla D, Dilhuydy H, Robitaille Y, Kessous-Elbaz A. Neuropathology of NFHgp160 transgenic mice expressing HIV-1 env protein in neurons. J Neuropathol Exp Neurol 2001; 60:574-87. [PMID: 11398834 DOI: 10.1093/jnen/60.6.574] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The physiopathology of HIV-1 dementia remains largely hypothetical. Although several sets of evidence point towards an indirect multicellular inflammatory pathway, gp120, one of the HIV-1 env products, was shown to be very cytotoxic for neurons in vitro. To explore a direct pathway in the physiopathology of dementia in AIDS, we developed transgenic mouse models carrying the HIV-1 env proteins gp 120 and gp 41 (gp 160) under the control of the human light neurofilament and murine heavy neurofilament promoters. To date, this is the first mouse model in which the HIV-1 env protein can be detected in neurons by immunohistochemistry. The expression is found in several brainstem and spinal cord gray structures and in the cerebellum in one of the mouse lines bearing the NFHgp160 transgene. The morphological findings at 3 months are subtle and are dominated by a watery, dendritic degeneration and a reactive gliosis. At 12 months, the evidence of neuronal degeneration and loss is present along with various degenerative phenomena involving synapses, dendrites and axons, including axonal swellings. Cytoskeletal abnormalities were found by immunohistochemistry. Chronic inflammation was also observed in the leptomeninges of the spinal cord and brainstem and in the cerebellar white matter. These models thus offer an exciting sequence of morphological findings initiated by the neuronal expression of the HIV-1 env proteins and offer a different tool to explore the neuronal dysfunction in AIDS.
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Affiliation(s)
- J Michaud
- Department of Pathology and Cellular Biology, University of Montreal, Canada
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Martin-Negrier M, Charron G, Bloch B. Agonist stimulation provokes dendritic and axonal dopamine D(1) receptor redistribution in primary cultures of striatal neurons. Neuroscience 2000; 99:257-66. [PMID: 10938431 DOI: 10.1016/s0306-4522(00)00187-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
To investigate the influence of neurotransmitter on G-protein-coupled receptor trafficking and compartimentalization in neurons, we have developed a model of primary neuronal cultures from fetal rat striatum on which we have studied the cellular and subcellular distribution and trafficking of the D(1) dopaminergic receptor. This receptor is known to be somatodendritic and axonal targeted in vivo, mostly to extrasynaptic locations. Immunohistochemical studies at the light and electron microscopic levels showed that, in cultures, the D(1) dopaminergic receptor is expressed in the absence of dopamine stimulation. The pattern of D(1) dopaminergic receptor immunostaining after stimulation by the D(1) dopaminergic receptor agonist SKF 82958 (1 microM) is dramatically modified with a decrease of the number of labeled D(1) dopaminergic receptor puncta (-40%) and an increase of their size in both dendrites (+120%) and axons (+240%). Seven hours after removal of the agonist, return to normal pattern was observed. The D(1) dopaminergic receptor antagonist SCH 23390 (2 microM) abolishes the effect of SKF 82958. Electron microscopy demonstrated, in dendrites, a translocation of the labeling from the plasma membrane to endosomes. Axonal D(1) dopaminergic receptor redistribution after acute stimulation indicates that the D(1) dopaminergic receptor is membrane targeted and responsive to stimulation. These results validate primary culture of striatal neurons to study subcellular localization and intraneuronal trafficking of G-protein-coupled receptors. This preparation will be useful to address various questions concerning the behavior and the trafficking of these receptors in neurons in relation to the neurotransmitter environment.
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Affiliation(s)
- M Martin-Negrier
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5541, Laboratoire d'Histologie-Embryologie, Universite V. Segalen-Bordeaux II, 146 rue Leo Saignat, 33076 Cedex, Bordeaux, France.
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Cassy S, Charlier M, Bélair L, Guillomot M, Charron G, Bloch B, Djiane J. Developmental expression and localization of the prolactin receptor (PRL-R) gene in ewe mammary gland during pregnancy and lactation: estimation of the ratio of the two forms of PRL-R messenger ribonucleic acid. Biol Reprod 1998; 58:1290-6. [PMID: 9603266 DOI: 10.1095/biolreprod58.5.1290] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
In this study, we have analyzed the developmental expression of the prolactin receptor (PRL-R) gene in the ewe mammary gland during pregnancy and lactation. Using Northern and slot-blot analysis and in situ hybridization, we showed that the level of PRL-R mRNA in mammary epithelial cells increased during the second half of pregnancy, decreased at the end of pregnancy, and remained relatively stable during lactation with a level above that observed at the beginning of pregnancy. As shown by RNase protection assay, the ratio of the long to the short form of the PRL-R mRNA was always above 1. This ratio increased between Day 70 of pregnancy and term and decreased progressively during lactation. The high level of PRL-R mRNA before the induction of alphaS1-casein gene expression suggests that PRL may be involved in the growth and development of the mammary gland. More precisely, the increase of the ratio of the long to the short form of the PRL-R during lactogenesis suggests that the latter form may have a dominant negative action in the activation of milk protein gene transcription. Thus the long/short-form ratio of the PRL-R may play a key role in the shift between growth and differentiation of the mammary gland.
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MESH Headings
- Animals
- Female
- Gene Expression Regulation, Developmental/genetics
- Gene Expression Regulation, Developmental/physiology
- Immunoblotting
- In Situ Hybridization
- Lactation/genetics
- Lactation/metabolism
- Mammary Glands, Animal/growth & development
- Mammary Glands, Animal/metabolism
- Pregnancy
- Pregnancy, Animal/genetics
- Pregnancy, Animal/metabolism
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Receptors, Prolactin/biosynthesis
- Receptors, Prolactin/genetics
- Ribonucleases/metabolism
- Sheep
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Affiliation(s)
- S Cassy
- Unité d'Endocrinologie moléculaire, Institut National de la Recherche Agronomique, Jouy-en-Josas, France
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Brana C, Aubert I, Charron G, Pellevoisin C, Bloch B. Ontogeny of the striatal neurons expressing the D2 dopamine receptor in humans: an in situ hybridization and receptor-binding study. Brain Res Mol Brain Res 1997; 48:389-400. [PMID: 9332736 DOI: 10.1016/s0169-328x(97)00114-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
D2 dopamine receptor (D2R) gene expression was analyzed by in situ hybridization and D2R ligand autoradiography in the human striatum during ontogeny. D2R mRNA and ([3H]YM-09151-2)-binding sites were detected in the striatum from week 12 of fetal life. At this time, D2R mRNA and binding sites were predominant in the putamen and occurred in a pattern of clusters. D2R-binding sites displayed a similar pattern. The signal in the caudate nucleus was weak from weeks 12 to 16. From week 20 of fetal life, D2R mRNA and D2R-binding sites signals became intense in the ventral striatum. At birth, D2R mRNA became homogeneously distributed while D2R-binding sites kept an heterogeneously distribution. Comparative topological and temporal analysis of the D2R, enkephalin and D1 dopamine receptor (D1R) mRNAs showed a distinct developmental pattern for each mRNA. Before birth, the neurons expressing enkephalin and D1R mRNAs were preferentially distributed in the matrix and in the striosomes, respectively, while the neurons expressing D2R mRNA did not display a preferential localization. At birth, high levels of enkephalin mRNA were restricted to the matrix; D1R mRNA level was homogeneous throughout the striatum. D2R mRNA was heterogeneously distributed in the whole striatum with high signals located both in the striosomes and the matrix. These results demonstrate that functional D2R are expressed as early as week 12 in the striatum with a heterogeneous distribution. Our findings also demonstrate that, in contrast to what was expected from similar studies in rodents, D2R mRNA and enkephalin mRNA do not display identical, overlapping expression patterns in striatal neurons during human ontogeny.
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Affiliation(s)
- C Brana
- UMR 5541, Laboratoire d'Histologie-Embryologie, Université V. Segalen Bordeaux II, France
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Garret M, Bascles L, Boue-Grabot E, Sartor P, Charron G, Bloch B, Margolskee RF. An mRNA encoding a putative GABA-gated chloride channel is expressed in the human cardiac conduction system. J Neurochem 1997; 68:1382-9. [PMID: 9084408 DOI: 10.1046/j.1471-4159.1997.68041382.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
GABA-gated chloride channels are the main inhibitory neurotransmitter receptors in the CNS. Conserved domains among members of previously described GABAA receptor subunits were used to design degenerate sense and antisense oligonucleotides. A PCR product from this amplification was used to isolate a full-length cDNA. The predicted protein has many of the features shared by other members of the ligand-gated ion channel family. This channel subunit has significant amino acid identity (25-40%) with members of GABAA and GABAC receptor subunits and thus may represent a new subfamily of the GABA receptor channel. Although we cannot rule out that this clone encodes a receptor for an unidentified ligand, it was termed GABA chi. This gene is mainly expressed in placenta and in heart; however, placenta appears to express only an unspliced mRNA. In situ hybridization reveals that the GABA chi subunit mRNA is present in the electrical conduction system of the human heart. Our results suggest that novel GABA receptors expressed outside of the CNS may regulate cardiac function.
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Affiliation(s)
- M Garret
- Laboratoire de Neurophysiologie, Université de Bordeaux 2, France
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Abstract
We studied D1 dopamine receptor (D1R) gene expression in the human striatum during ontogeny by in situ hybridization, immunohistochemistry, and D1R ligand autoradiography. D1R mRNA, protein, and binding sites ([3H]SCH 23390) were detected in the striatum from week 12 of fetal life. At this time, D1R mRNA was predominant in the striosomal neurons; D1R immunoreactivity (D1R-IR) and D1R binding sites displayed a pattern similar to D1R mRNA. D1R-IR was essentially present in striosomal cell bodies and neuropil, whereas only a few cell bodies were detected in the matrix. From week 20 of fetal life, D1R gene expression developed in the matrix neurons as well, thus leading to an even D1R mRNA expression throughout striosomes and matrix compartments at birth. Comparative analysis of the expression of D1R and dynorphin mRNA show the same developmental patchy pattern up to week 26. Indeed, neurons expressing the D1R gene contain dynorphin mRNA; in contrast, they do not express the preproenkephalin A gene. At birth, the pattern of D1R mRNA expression level was sharply different from that of dynorphin (DYN) gene expression. High DYN mRNA expression was restricted to the striosomes, whereas high D1R mRNA expression was present in the whole striatum. These results demonstrate that, during human ontogeny, functional D1 receptors are expressed as early as week 12 in the striatum, developing initially in the striosomal neurons containing high dynorphin mRNA content. Toward the end of fetal life, there is a dissociation between D1R and DYN expression levels, suggesting that neuroanatomical or neurochemical modifications occur at this period, which may contribute to the regulation of the tone of the striatal D1R and DYN gene with topological specificity.
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Affiliation(s)
- C Brana
- UMR CNRS 5541-Laboratoire d'Histologie-Embryologie, Université de Bordeaux II, France
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Abstract
To define DNA regions involved in the neuron-specific expression of the neurofilament light (NF-L) gene, we generated transgenic mice bearing different NF-L constructs. A 4.9-kilobase human NF-L fragment including -292 base pairs of 5'-flanking sequences contained sufficient elements for nervous system expression in transgenic mice. Deletion of introns 1 and 2 from this 4.9-kilobase DNA fragment resulted in reduced levels of transgene expression in the cortex, while deletion of intron 3 had little effect. Both introns 1 and 2 could act independently as enhancers to confer neuronal expression of the basal heat shock promoter (hsp68) fused to lacZ in transgenic mice. The hNF-L basal promoter (-292 base pairs) was found to contain elements for directing neuronal expression of either the lacZ reporter gene or an intronless hNF-L construct. Sequence comparison revealed that intron 1, intron 2, and the basal human NF-L promoter all contain an ETS-like motif, CAGGA, present in a variety of genes expressed in the nervous system.
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Affiliation(s)
- G Charron
- Centre for Research in Neuroscience, McGill University, Montreal General Hospital Research Institute, Quebec, Canada
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Charron G, Julien JP, Bibor-Hardy V. Neuron specificity of the neurofilament light promoter in transgenic mice requires the presence of DNA unwinding elements. J Biol Chem 1995; 270:25739-45. [PMID: 7592755 DOI: 10.1074/jbc.270.43.25739] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Three reporter genes, the chloramphenicol acetyltransferase (CAT), the lacZ, and the intronless NF-L DNA, were used to test the activity of the proximal promoter region (-292 bp) of the human neurofilament light (hNF-L) gene in transgenic mice. Surprisingly, the hNF-L/CAT construct was highly sensitive to position effect, and its expression was found at low levels in several tissues of adult transgenic mice (Beaudet, L., Charron, G., Houle, D., Tretjakoff, I. Peterson, A., and Julien, J.-P. (1992) Gene (Amst.) 116, 205-214). In contrast, the hNF-L/lacZ or the hNF-L/intronless constructs were expressed exclusively in the nervous system during embryonic development and in adult animals. The DNA sequences analysis of the different reporter genes revealed the presence of matrix attachment regions (MARs) within the 3'-untranslated regions of all three transgenes. DNA unwinding elements were found within the MARs of lacZ and hNF-L gene constructs but not in the CAT gene construct. When this element was removed from the lacZ construct, expression of the hNF-L/lacZ transgene became susceptible to position effect and was no longer tissue-specific. These results indicate that DNA unwinding elements are essential for position effect independence conferred by MARs to the hNF-L basal promoter.
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Affiliation(s)
- G Charron
- Montreal General Hospital Research Institute, Quebec, Canada
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Dahmane N, Charron G, Lopes C, Yaspo ML, Maunoury C, Decorte L, Sinet PM, Bloch B, Delabar JM. Down syndrome-critical region contains a gene homologous to Drosophila sim expressed during rat and human central nervous system development. Proc Natl Acad Sci U S A 1995; 92:9191-5. [PMID: 7568099 PMCID: PMC40950 DOI: 10.1073/pnas.92.20.9191] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Many features of Down syndrome might result from the overdosage of only a few genes located in a critical region of chromosome 21. To search for these genes, cosmids mapping in this region were isolated and used for trapping exons. One of the trapped exons obtained has a sequence very similar to part of the Drosophila single-minded (sim) gene, a master regulator of the early development of the fly central nervous system midline. Mapping data indicated that this exonic sequence is only present in the Down syndrome-critical region in the human genome. Hybridization of this exonic sequence with human fetal kidney poly(A)+ RNA revealed two transcripts of 6 and 4.3 kb. In situ hybridization of a probe derived from this exon with human and rat fetuses showed that the corresponding gene is expressed during early fetal life in the central nervous system and in other tissues, including the facial, skull, palate, and vertebra primordia. The expression pattern of this gene suggests that it might be involved in the pathogenesis of some of the morphological features and brain anomalies observed in Down syndrome.
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MESH Headings
- Amino Acid Sequence
- Animals
- Base Sequence
- Basic Helix-Loop-Helix Transcription Factors
- Central Nervous System/embryology
- Chromosomes, Human, Pair 21
- Cosmids
- DNA-Binding Proteins/biosynthesis
- DNA-Binding Proteins/genetics
- Down Syndrome/genetics
- Drosophila/embryology
- Drosophila/genetics
- Drosophila Proteins
- Embryonic and Fetal Development
- Exons
- Gene Expression
- Genes, Insect
- Genes, Regulator
- Genome, Human
- Helix-Loop-Helix Motifs
- Humans
- In Situ Hybridization, Fluorescence
- Kidney/embryology
- Kidney/metabolism
- Molecular Sequence Data
- Nuclear Proteins/biosynthesis
- Nuclear Proteins/genetics
- Oligonucleotide Probes
- Organ Specificity
- RNA, Messenger/analysis
- RNA, Messenger/biosynthesis
- Rats
- Sequence Homology, Amino Acid
- Sequence Homology, Nucleic Acid
- Sequence Tagged Sites
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Affiliation(s)
- N Dahmane
- Unité de Recherche Associée 1335 Centre National de la Recherche Scientifique, Hôpital Necker, Paris, France
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Brana C, Charron G, Aubert I, Carles D, Martin-Negrier ML, Trouette H, Fournier MC, Vital C, Bloch B. Ontogeny of the striatal neurons expressing neuropeptide genes in the human fetus and neonate. J Comp Neurol 1995; 360:488-505. [PMID: 8543654 DOI: 10.1002/cne.903600310] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The distribution patterns of neurons expressing mRNAs for four neuropeptides in the human striatum were studied during ontogeny by the use of in situ hybridization. The results of our study demonstrate that somatostatin, enkephalin, dynorphin, and substance P mRNAs are present in striatal neuronal populations from week 12 of fetal life. Each neuronal population undergoes a specific differentiation. Neurons containing somatostatin mRNA are scattered throughout the caudate-putamen up until birth. Neurons containing enkephalin, dynorphin, or substance P mRNAs evolve throughout fetal life in relation to caudate-putamen and patch-matrix compartmentalization. Neurons containing enkephalin mRNA (distinct from those containing substance P or dynorphin mRNAs) are present in the matrix from week 12 of fetal life. These neurons are preferentially distributed in the matrix and, at birth, display higher enkephalin mRNA content in the matrix than in the patches. Dynorphin mRNA is found in the caudate and putamen, preferentially in the patch neurons; nevertheless, a low level of dynorphin mRNA is also present in neurons of the caudate matrix. Substance P mRNA is initially restricted to caudate neurons. At birth, both substance P and dynorphin mRNAs are expressed at high levels in the patches. These results demonstrate that each neuropeptide gene is expressed during human fetal life in neurons with a specific topology and pace of development in relation to caudate-putamen and patch-matrix differentiation. These results also contribute evidence that neurochemical evolution of the striatal neuronal populations is not complete at birth in humans.
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Affiliation(s)
- C Brana
- EP CNRS 74-Laboratoire d'Histologie-Embryologie, Université de Bordeaux II, France
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Simonin F, Gavériaux-Ruff C, Befort K, Matthes H, Lannes B, Micheletti G, Mattéi MG, Charron G, Bloch B, Kieffer B. kappa-Opioid receptor in humans: cDNA and genomic cloning, chromosomal assignment, functional expression, pharmacology, and expression pattern in the central nervous system. Proc Natl Acad Sci U S A 1995; 92:7006-10. [PMID: 7624359 PMCID: PMC41460 DOI: 10.1073/pnas.92.15.7006] [Citation(s) in RCA: 163] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Using the mouse delta-opioid receptor cDNA as a probe, we have isolated genomic clones encoding the human mu- and kappa-opioid receptor genes. Their organization appears similar to that of the human delta receptor gene, with exon-intron boundaries located after putative transmembrane domains 1 and 4. The kappa gene was mapped at position q11-12 in human chromosome 8. A full-length cDNA encoding the human kappa-opioid receptor has been isolated. The cloned receptor expressed in COS cells presents a typical kappa 1 pharmacological profile and is negatively coupled to adenylate cyclase. The expression of kappa-opioid receptor mRNA in human brain, as estimated by reverse transcription-polymerase chain reaction, is consistent with the involvement of kappa-opioid receptors in pain perception, neuroendocrine physiology, affective behavior, and cognition. In situ hybridization studies performed on human fetal spinal cord demonstrate the presence of the transcript specifically in lamina II of the dorsal horn. Some divergences in structural, pharmacological, and anatomical properties are noted between the cloned human and rodent receptors.
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MESH Headings
- Adenylyl Cyclases
- Aged
- Amino Acid Sequence
- Base Sequence
- Central Nervous System/chemistry
- Central Nervous System/physiology
- Chromosome Mapping
- Chromosomes, Human, Pair 8/genetics
- Cloning, Molecular
- DNA, Complementary/genetics
- Exons/genetics
- Genomic Library
- Humans
- In Situ Hybridization
- Ligands
- Middle Aged
- Molecular Sequence Data
- RNA, Messenger/isolation & purification
- Receptors, Opioid, kappa/genetics
- Receptors, Opioid, kappa/isolation & purification
- Receptors, Opioid, kappa/metabolism
- Receptors, Opioid, mu/genetics
- Receptors, Opioid, mu/isolation & purification
- Receptors, Opioid, mu/metabolism
- Recombinant Proteins/metabolism
- Sequence Homology, Amino Acid
- Signal Transduction
- Tissue Distribution
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Affiliation(s)
- F Simonin
- Ecole Supérieure de Biotechnologie, Parc d'innovation, Boulevard Sébastien Brandt, Illkirch-Graffenstaden, France
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Beaudet L, Charron G, Houle D, Tretjakoff I, Peterson A, Julien JP. Intragenic regulatory elements contribute to transcriptional control of the neurofilament light gene. Gene 1992; 116:205-14. [PMID: 1634118 DOI: 10.1016/0378-1119(92)90517-s] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To date, no DNA regions involved in the neuron-specific expression of the neurofilament light gene (NF-L) have been defined using transfection assays in cultured cells. To identify those regulatory regions in the human NF-L gene, we generated transgenic mice with a construct containing the basal NF-L promoter (-292 to +15) fused to the cat gene and with three DNA fragments of 21.5, 7.6 and 4.9 kb each, including NF-L with different lengths of either 5'- or 3'-flanking sequences. We show that the proximal NF-L 5' region (0.3 kb) constitutes a weak promoter and that it lacks information to confer neural specificity. However, appropriate expression in the nervous system occurred when this minimal promoter was combined with either 7.3 or 4.6 kb of NF-L sequences downstream from the transcription start point. We conclude that the intragenic NF-L region contains cis-acting elements conferring cell-type-specific regulation on the basal activity of the NF-L promoter. Interestingly, AP-2 motifs were found within homologously placed introns of all three NF genes, as well as in the promoter regulatory regions of many neuronal genes. We propose that the acquisition of introns by an ancestral intronless IF gene may have contributed to the emergence of a lineage of IF genes expressed in the nervous system.
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Affiliation(s)
- L Beaudet
- Montreal General Hospital Research Institute, Quebec, Canada
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Abstract
The human neurofilament light (hNF-L) gene yields two major species of mRNAs of 2.4 and 3.8 kilobases (kb) in size. To investigate the origin of these two mRNAs, we have analyzed in transgenic mice the expression of hNF-L DNA fragments including different lengths of 5'-flanking regions. The finding that the 3.8-kb mRNA species is produced by a hNF-L transgene that includes only the proximal promoter region (-0.3 kb) demonstrates that both the 2.4- and 3.8-kb mRNAs are derived from the same site of transcription initiation. Sequencing of the 3' untranslated region of the hNF-L gene revealed the presence of multiple AATAAA polyadenylation signals. We conclude from Northern blotting experiments using probes spanning various regions of the hNF-L gene that the 2.4- and 3.8-kb mRNAs originate from the selective use of polyadenylation signals located 1.4 kb apart.
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Affiliation(s)
- L Beaudet
- Centre for Research in Neuroscience, McGill University, Montréal, Que., Canada
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Charron G, Souloumiac J, Fournier MC, Canivenc R. Pineal rhythm of N-acetyltransferase activity and melatonin in the male badger, Meles meles L, under natural daylight: relationship with the photoperiod. J Pineal Res 1991; 11:80-5. [PMID: 1757888 DOI: 10.1111/j.1600-079x.1991.tb00460.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The rhythmicity of melatonin secretion and of pineal NAT activity was compared in male badger kept in natural daylight during two distinctly different photoperiods (January and June). The hormone and its enzyme follow the same pattern with a nighttime elevation and a low level during the day, demonstrating the presence of a nyctohemeral rhythm. The high correlation found between the NAT activity and the melatonin concentration suggests that NAT is the rate-limiting enzyme in melatonin synthesis in the badger. Peak amplitudes were similar under the two photoperiods. Melatonin secretion occurred in the first part of the night irrespective of the photoperiod. The rhythm of melatonin secretion is modified by the photoperiod. The duration of high nighttime levels varies; it is longer (8 h) when the night is long (16 h) in January, and shorter (6 h) when the night is short (8 h) in June. In the badger, differences in the duration of high level melatonin at night may reflect variations in day length and convey to the animal the photoperiodic information.
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Affiliation(s)
- G Charron
- Laboratoire d'Endocrinologie Expérimentale (U.F.R. II), Université de Bordeaux II, France
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Bonnin M, Martin B, Charron G, Audy MC, Canivenc R. C21 steroids and transcortin-type protein during delayed implantation in the European badger Meles meles L. J Steroid Biochem 1984; 20:575-80. [PMID: 6708540 DOI: 10.1016/0022-4731(84)90126-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A high-affinity corticosteroid-binding protein (CBG) roughly resembling a transcortin-type protein is present in badger plasma. Plasma CBG, corticosteroid and progesterone (P) concentrations were measured in relation to delayed implantation, true progestation and gestation. Two significant CBG increases were observed during pregnancy. The first, in the second half of embryonic diapause coincides with an increase in plasma corticosteroid concentration and the second, during true progestation and gestation, with an increase in P concentration. Relationship of CBG increases with pregnancy in badger are discussed.
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Bonnin M, Canivenc R, Charron G. [Changes in plasma progesterone levels in the female badger after removal of the pregnant uterus]. C R Seances Acad Sci III 1981; 293:143-5. [PMID: 6794864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In the European badger Meles meles L., the progesterone profile during the gestational phase shows two successive periods. The first, corresponding to implantation could be due to pituitary stimulation and seems not to have any relation with embryos. The second seems to be due to the presence of the placenta. Indeed, after hysterectomy the levels of plasma progesterone are significantly lower.
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Charron G, Charron P. [History of the SERENA team and the thermal symptoms method]. Cah Nurs 1968; 61:239-40. [PMID: 5187380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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