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Chae H, Banerjee A, Dussauze M, Albeanu DF. Long-range functional loops in the mouse olfactory system and their roles in computing odor identity. Neuron 2022; 110:3970-3985.e7. [PMID: 36174573 PMCID: PMC9742324 DOI: 10.1016/j.neuron.2022.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 07/12/2022] [Accepted: 09/02/2022] [Indexed: 12/15/2022]
Abstract
Elucidating the neural circuits supporting odor identification remains an open challenge. Here, we analyze the contribution of the two output cell types of the mouse olfactory bulb (mitral and tufted cells) to decode odor identity and concentration and its dependence on top-down feedback from their respective major cortical targets: piriform cortex versus anterior olfactory nucleus. We find that tufted cells substantially outperform mitral cells in decoding both odor identity and intensity. Cortical feedback selectively regulates the activity of its dominant bulb projection cell type and implements different computations. Piriform feedback specifically restructures mitral responses, whereas feedback from the anterior olfactory nucleus preferentially controls the gain of tufted representations without altering their odor tuning. Our results identify distinct functional loops involving the mitral and tufted cells and their cortical targets. We suggest that in addition to the canonical mitral-to-piriform pathway, tufted cells and their target regions are ideally positioned to compute odor identity.
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Affiliation(s)
- Honggoo Chae
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA
| | - Arkarup Banerjee
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA; Cold Spring Harbor Laboratory School for Biological Sciences, Cold Spring Harbor, NY, USA
| | - Marie Dussauze
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA; Cold Spring Harbor Laboratory School for Biological Sciences, Cold Spring Harbor, NY, USA
| | - Dinu F Albeanu
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA; Cold Spring Harbor Laboratory School for Biological Sciences, Cold Spring Harbor, NY, USA.
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Lelchat F, Dussauze M, Lemaire P, Theron M, Toffin L, Le Floch S. Measuring the biological impact of drilling waste on the deep seafloor: An experimental challenge. J Hazard Mater 2020; 389:122132. [PMID: 32062395 DOI: 10.1016/j.jhazmat.2020.122132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 08/29/2019] [Revised: 01/14/2020] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
The depletion of traditional oil fields is driving the oil & gas industry to explore new exploitation sites previously considered as unprofitable. Deep-sea oil fields represent one of these new areas of exploitation. Well drilling during exploration and production operations generate large quantities of drilling waste whose biological impact on the deep-sea floor remains largely unknown. Because of the harsh abiotic factors characterizing this environment, the evaluation of this impact remains challenging. High hydrostatic pressure is the prominent factor which will affect in-situ biological processes. This review will examine the feedback on the various strategies used to evaluate the biological impact of deep-sea drilling waste deposition as well as the current technological limitations. Given the complexity of this issue, a good perspective strategy would be to trend towards the research and development of more relevant bioassays, especially considering the crucial factor of hydrostatic pressure.
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Affiliation(s)
- F Lelchat
- Cedre, 715 rue Alain Colas - CS 41836, 29218 Brest Cedex 2, France; Leo viridis, 140 Avenue Graham Bell, 29280 Plouzané, France.
| | - M Dussauze
- EA 4324 ORPHY, Université de Bretagne Occidentale, Université de Brest, 6 avenue LE GORGEU, CS 93837, 29238 Brest Cedex 3, France
| | - P Lemaire
- TOTAL FLUIDES SAS, 24 cours Michelet - 92800 Puteaux, 342 241 908 RCS Nanterre, France
| | - M Theron
- EA 4324 ORPHY, Université de Bretagne Occidentale, Université de Brest, 6 avenue LE GORGEU, CS 93837, 29238 Brest Cedex 3, France
| | - L Toffin
- Laboratoire de Microbiologie des Environnements Extrêmes, UMR6197, Ifremer Centre de Bretagne, ZI de la pointe du diable, CS 10070, 29280 Plouzané, France
| | - S Le Floch
- Cedre, 715 rue Alain Colas - CS 41836, 29218 Brest Cedex 2, France
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Naudon L, François A, Mariadassou M, Monnoye M, Philippe C, Bruneau A, Dussauze M, Rué O, Rabot S, Meunier N. First step of odorant detection in the olfactory epithelium and olfactory preferences differ according to the microbiota profile in mice. Behav Brain Res 2020; 384:112549. [PMID: 32050097 DOI: 10.1016/j.bbr.2020.112549] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 01/16/2020] [Accepted: 02/08/2020] [Indexed: 02/09/2023]
Abstract
We have previously provided the first evidence that the microbiota modulates the physiology of the olfactory epithelium using germfree mice. The extent to which changes to the olfactory system depend on the microbiota is still unknown. In the present work, we explored if different microbiota would differentially impact olfaction. We therefore studied the olfactory function of three groups of mice of the same genetic background, whose parents had been conventionalized before mating with microbiota from three different mouse strains. Caecal short chain fatty acids profiles and 16S rRNA gene sequencing ascertained that gut microbiota differed between the three groups. We then used a behavioural test to measure the attractiveness of various odorants and observed that the three groups of mice differed in their attraction towards odorants. Their olfactory epithelium properties, including electrophysiological responses recorded by electro-olfactograms and expression of genes related to the olfactory transduction pathway, also showed several differences. Overall, our data demonstrate that differences in gut microbiota profiles are associated with differences in olfactory preferences and in olfactory epithelium functioning.
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Affiliation(s)
- Laurent Naudon
- Université Paris-Saclay, INRAE, AgroParisTech, CNRS, Micalis Institute, 78350, Jouy-en-Josas, France.
| | - Adrien François
- Université Paris-Saclay, UVSQ, INRAE, NBO, 78350, Jouy-en-Josas, F-78350, France
| | | | - Magali Monnoye
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Catherine Philippe
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Aurélia Bruneau
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Marie Dussauze
- Université Paris-Saclay, UVSQ, INRAE, NBO, 78350, Jouy-en-Josas, F-78350, France
| | - Olivier Rué
- Université Paris-Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France
| | - Sylvie Rabot
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Nicolas Meunier
- Université Paris-Saclay, UVSQ, INRAE, NBO, 78350, Jouy-en-Josas, F-78350, France
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Lepicard A, Cardinal T, Fargin E, Adamietz F, Rodriguez V, Richardson K, Dussauze M. Micro-structuring the surface reactivity of a borosilicate glass via thermal poling. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.09.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Petit Y, Royon A, Marquestaut N, Dussauze M, Fargues A, Veber P, Jubera V, Cardinal T, Canioni L. Two-photon excited fluorescence in the LYB:Eu monoclinic crystal: towards a new scheme of single-beam dual-voxel direct laser writing in crystals. Opt Express 2013; 21:822-833. [PMID: 23388975 DOI: 10.1364/oe.21.000822] [Citation(s) in RCA: 2] [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: 06/01/2023]
Abstract
We report on two-photon excited fluorescence in the oriented Eu(3+)doped LYB monoclinic crystal under femtosecond laser tight focusing. Due to spatial walk-off, the two polarization modes of the incident femtosecond beam simultaneously provide the independent excitation of two distinct focuses, leading to a single-beam dual-voxel nonlinear excitation of fluorescence below material modification threshold. These observations emphasize on the anisotropy of both two-photon absorption as well as fluorescence emission. They demonstrate the localized control of the nonlinear energy deposit, thanks to the adjustment of both the input power and polarization, by properly balancing the injected energy in each voxel. Such approach should be considered for future direct laser writing of waveguides in propagation directions out of the dielectric axes, so as to optimally cope with the highly probable anisotropy of laser-induced material modification thresholds in these crystals. These results open new ways for further potential developments in direct laser writing as the simultaneous inscription of double-line structures for original waveguides processes.
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Affiliation(s)
- Y Petit
- Université Bordeaux, LOMA, UMR 5798, F-33400 Talence, France.
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Dussauze M, Giannoudakos A, Velli L, Varsamis CPE, Kompitsas M, Kamitsos EI. Structure and optical properties of amorphous lead-germanate films developed by pulsed-laser deposition. J Chem Phys 2007; 127:034704. [PMID: 17655452 DOI: 10.1063/1.2752503] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Lead-germanate materials are attractive systems for photonics applications. In this context, amorphous lead-germanate films were grown by pulsed-laser deposition at different substrate temperatures and oxygen pressures using a glassy target of composition 0.4PbO-0.6GeO(2). Optical and infrared measurements showed that the substrate temperature has a strong influence on the optical quality and stability of the deposited films. An accurate characterization of films was achieved by comparing experimental and simulated transmittance spectra in the infrared, and allowed to probe the structural evolution and variations in composition as a function of oxygen pressure. The results showed that the difference in reactivity of lead and germanium toward oxygen in the laser-produced plasma allows for composition adjustments in the lead-germanate films by varying the oxygen pressure in the deposition chamber.
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Affiliation(s)
- M Dussauze
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
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Ducasse L, Dussauze M, Grondin J, Lassègues JC, Naudin C, Servant L. Spectroscopic study of poly(ethylene oxide)6: LiX complexes (X = PF6, AsF6, SbF6, ClO4). Phys Chem Chem Phys 2002. [DOI: 10.1039/b211166g] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [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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