|
|
|
| Registros recuperados: 26 | |
|
| |
|
|
| Barrozo, R.B.; Couton, L.; Lazzari, C.R.; Insauti, T.C.; Minoli, S.A.; Fresquet, N.; Rospars, J.P.; Anton, S.. |
| The haematophagous bug Rhodnius prolixus has been a model system in insect physiology for a long time. Recently, several studies have been devoted to its sensory systems, including olfaction. However, few data are available on the basic organisation of the nervous system in this species. By means of neuronal backfills, histology, confocal microscopy and three-dimensional reconstruction methods, we have characterized the projection patterns of antennal sensory neurons within the central nervous system of this disease-vector insect. We established the first partial three-dimensional map of the antennal lobe (AL) of a hemipteran insect. The ALs of this species are relatively diffuse structures, which nevertheless show a glomerular organisation. Based on... |
| Tipo: Journal Article |
Palavras-chave: RHODNIUS PROLIXUS; ARTHROPODA; HEXAPODA; INSECTE; HEMIPTERA; SYSTEME NERVEUX CENTRAL; NEURONE; OLFACTION; HISTOLOGIE; MICROSCOPIE CONFOCALE; CARTE TRIDIMENSIONNELLE; LOBE ANTENNAIRE; GLOMERULE; HETEROPTERA; REDUVIIDAE ANTENNAL LOBE; THREE-DIMENSIONAL RECONSTRUCTION; QUANTITATIVE ANALYSIS; DISEASE-VECTOR INSECT; ANTENNAL PROJECTIONS. |
| Ano: 2009 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010f9cf078d&uri=/notices/prodinra1/2010/11/ |
| |
|
| |
|
| |
|
| |
|
|
| Duportets, L.; Barrozo, R.B.; Bozzolan, F.; Gaertner, C.; Anton, S.; Gadenne, C.; Debernard, S.. |
| In the male moth Agrotis ipsilon behavioural response and antennal lobe (AL) neuron sensitivity to the female-produced sex pheromone increase with age and juvenile hormone (JH) level. We recently showed that the neuromodulator, octopamine (OA), interacts with JH in this age-dependent olfactory plasticity. To further elucidate its role, we cloned a full cDNA encoding a protein that presents biochemical features essential to OA/tyramine receptor (AipsOAR/TAR) function. The AipsOAR/TAR transcript was detected predominantly in the antennae, the brain and, more specifically, in ALs where its expression level varied concomitantly with age. This expression plasticity indicates that AipsOAR/TAR might be involved in central processing of the pheromone signal during... |
| Tipo: Journal Article |
Palavras-chave: LOBE ANTENNAIRE; LEPIDOPTERA; NOCTUIDAE; AGROPIS IPSILON; RECEPTEUR; OLFACTION; MITE; INSECTE; MATURATION SEXUELLE; ARTHROPODA; HEXAPODA; NEURONE; PHEROMONE; HORMONE; ADNC; CLONAGE; COMPORTEMENT SEXUEL; ATTRACTIF SEXUEL ANTENNAL LOBE; OCTOPAMINE/TYRAMINE RECEPTOR; OLFACTORY PROCESSING; MATURATION; EXPRESSION PLASTICITY. |
| Ano: 2010 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20102d18e75d&uri=/notices/prodinra1/2011/02/ |
| |
|
|
| Rospars, J.P.; Lansky, P.; Chaput, M.; Duchamp-Viret, P.. |
| Most olfactory receptor neurons (ORNs) express a single type of olfactory receptor that is differentially sensitive to a wide variety of odorant molecules. The diversity of possible odorant-receptor interactions raises challenging problems for the coding of complex mixtures of many odorants, which make up the vast majority of real world odors. Pure competition, the simplest kind of interaction, arises when two or more agonists can bind to the main receptor site, which triggers receptor activation, although only one can be bound at a time. Noncompetitive effects may result from various mechanisms, including agonist binding to another site, which modifies the receptor properties at the main binding site. Here, we investigated the electrophysiological... |
| Tipo: Journal Article |
Palavras-chave: CODAGE; MODELE; OLFACTION; NEURONE; RECEPTEUR; ODEUR; INTERACTION MOLECULAIRE; CONCENTRATION; ANALYSE STATISTIQUE SENSORY CODING; OLFACTORY RECEPTOR NEURON; IN VIVO; SIGNAL TRANSDUCTION; ALLOSTERY; MIXTURE INTERACTION. |
| Ano: 2008 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20105031bac0&uri=/notices/prodinra1/2010/10/ |
| |
|
|
| Gu, Y.; Lucas, P.; Rospars, J.P.. |
| All sensory neurons transduce their natural stimulus, whether a molecule, a photon, or a mechanical force, in an electrical current flowing through their sensory membrane via similar molecular and ionic mechanisms. Olfactory receptor neurons (ORNs), whose stimuli are volatile molecules, are no exception, including one of the best known: the exquisitely sensitive ORNs of male moths that detect the sexual pheromone released by conspecific females. We provide a detailed computational model of the intracellular molecular mechanisms at work in this ORN type. We describe qualitatively and quantitatively how the initial event, the interaction of pheromone molecules with specialized receptors at the ORN surface, is amplified through a sequence of linked... |
| Tipo: Journal Article |
Palavras-chave: MODELE; INSECTE; PHEROMONE; NEURONE; RECEPTEUR; MITE; PROTEINE; ACTIVITE ENZYMATIQUE; CANAL A CALCIUM; CANAL A POTASSIUM; PROTEINE KINASE C; CALMODULINE; OLFACTION OLFACTORY RECEPTOR NEURONS; PROTEIN-KINASE-C; DROSOPHILA ODORANT RECEPTORS; ANTHERAEA-POLYPHEMUS; CHLORIDE CURRENT; PHOSPHOLIPASE-C; BOMBYX-MORI; SENSILLA TRICHODEA; DEGRADING ENZYME; CATION CHANNELS. |
| Ano: 2009 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010634023e&uri=/notices/prodinra1/2010/10/ |
| |
|
| |
|
| |
|
|
| Trujillo-Cenóz, O.; Melamed, J.. |
| The pedunculate bodies consist of three fibrillar regions: calyces, stalk, and roots. A group of small association neurons (the globule cells) lies within and around the calyces. The synaptic region of the calyces shows, under the phase contrast microscope, small, dense circumscribed areas of neuropil corresponding to the so-called “glomeruli” of light microscopists. The electron microscope demonstrated that each glomerulus consists of a large central nerve ending and several thin peripheral fibers. The central ending is filled with small vesicles. Mitochondria and dense granules are found intermixed with the vesicular material. The peripheral fibers contain mitochondria, slender tubules, and a few vesicles. The origin of the central ending and... |
| Tipo: Journal Article-postprint |
Palavras-chave: INSECT; BRAIN; NEURONE; PEDUNCULATE BODY; CALYCE; ELECTRON MICROSCOPE; INSECTE; CERVEAU. |
| Ano: 1962 |
URL: http://hdl.handle.net/2174/513 |
| |
|
| |
|
|
| Palin, K.; Moreau, M. L..; Sauvant, J.; Orcel, H.; Nadjar, A.; Duvoid-Guillou, A.; Dudit, J.; Rabié, A.; Moos, F.. |
| The increase of plasma arginin-vasopressin (AVP) release, which translates hypothalamic AVP neuron activation in response to immune challenge, appears to occur independently of plasma osmolality or blood pressure changes. Many studies have shown that major inflammatory mediators produced in response to peripheral inflammation, such as prostaglandin (PG)-E2 and interleukin (IL)-1β, excite AVP neurons. However, in vivo electrical activation of AVP neurons was still not assessed in relation to plasma AVP release, osmolality, or blood pressure or to the expression and role of inflammatory molecules like PG-E2, IL-1β, IL-6, and tumor necrosis factor-{alpha} (TNF{alpha}). This study aims at elucidating those factors that underlie the activation of AVP neurons in... |
| Tipo: Journal Article |
Palavras-chave: HORMONE ANTIDIURÉTIQUE; NEURONE; CERVEAU; DIURÈSE; OSMOLALITÉ; PRESSION ARTÉRIELLE; NOYAU SUPRA-OPTIQUE; PLASMA; PROSTAGLANDINE; INTERLEUKINE; FACTEUR DE NÉCROSE TUMORALE; ACTIVATION DES NEURONES LIPOPOLYSACCHARIDE INDUCED-HYPOTHALAMIC VASOPRESSIN NEURON ACTIVATION; BRAIN CYTOKINES; DIURESIS; PLASMA OSMOLALITY; BLOOD PRESSURE. |
| Ano: 2009 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009179193ce&uri=/notices/prodinra1/2010/09/ |
| |
|
|
| Barrozo, R.; Jarriault, D.; Simeone, X.; Gaertner, C.; Gadenne, C.; Anton, S.. |
| In the male moth, Agrotis ipsilon, mating induces a transient inhibition of behavioural and central nervous responses to sex pheromone. Newly mated males are not attracted to sex pheromone, and the sensitivity of their antennal lobe (AL) neurons is lower than in virgin males. This rapid transient olfactory inhibition prevents them from re-mating unsuccessfully until they have refilled their sex glands. We hypothesized that this olfactory ‘switch off’ might be controlled by neuromodulators such as biogenic amines. To test our hypothesis, we studied the effects of octopamine (OA) and serotonin (5-hydroxytryptamine, 5-HT) on the coding properties of pheromone-sensitive AL neurons in virgin and newly mated males. We show that AL neuron sensitivity increased in... |
| Tipo: Journal Article |
Palavras-chave: AGROTIS IPSILON; INSECTE; MITE; OLFACTION; ODEUR; LOBE ANTENNALE; PHEROMONE SEXUELLE; ATTRACTIF SEXUEL; SEROTONINE; PLASTICITE; SYSTEME NERVEUX CENTRAL; NEURONE; RECEPTEUR; OCTOPAMINE; NOCTUIDAE; LEPIDOPTERA OLFACTORY CODING; MOTH; ANTENNAL LOBE; SEX PHEROMONE; PROJECTION NEURON; MATING; OCTOPAMINE; SEROTONIN; PLASTICITY. |
| Ano: 2010 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010e7ad9fc3&uri=/notices/prodinra1/2010/09/ |
| |
|
| |
|
|
| Montagné, N.; Desdevises, Y.; Soyez, D.; Toullec, J.-Y.. |
| Background: Crustacean Hyperglycemic Hormone (CHH) family peptides are neurohormones known to regulate several important functions in decapod crustaceans such as ionic and energetic metabolism, molting and reproduction. The structural conservation of these peptides, together with the variety of functions they display, led us to investigate their evolutionary history. CHH family peptides exist in insects (Ion Transport Peptides) and may be present in all ecdysozoans as well. In order to extend the evolutionary study to the entire family, CHH family peptides were thus searched in taxa outside decapods, where they have been, to date, poorly investigated. Results: CHH family peptides were characterized by molecular cloning in a branchiopod crustacean, Daphnia... |
| Tipo: Journal Article |
Palavras-chave: HORMONE; GLYCEMIE; TENEUR EN SUCRE; HYPERGLYCEMIE; PROTEINE; ANALYSE PHYLOGENETIQUE; VITELLOGENESE; NEURONE; PEPTIDE; TENEUR EN PROTEINE; CLONAGE MOLECULAIRE; SEQUENCE NUCLEOTIDIQUE; PHYLOGENIE; PCR; ACIDE AMINE; BRACHIOPODA; COLLEMBOLA; EUCARYOTE; DAPHNIA MAGNA; FOLSOMIA CANDIDA; ECDYSOZOA VITELLOGENESIS-INHIBITING ACTIVITY; ARMADILLIDIUM-VULGARE CRUSTACEA; SHRIMP LITOPENAEUS-VANNAMEI; TRANSPORT PEPTIDE ITP; MAXIMUM-LIKELIHOOD; NUCLEOTIDE SUBSTITUTION; PHYLOGENETIC ANALYSIS; PERIPHERAL NEURONS; PROTEIN EVOLUTION; EYESTALK REMOVAL. |
| Ano: 2010 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20107696ebf9&uri=/notices/prodinra1/2010/10/ |
| |
|
| |
|
| |
|
|
| Lansky, P.; Rospars, J.P.. |
| The temporal patterns of action potentials fired by a two-point stochastic neuron model were investigated. In this model the membrane potential of the dendritic compartment follows the Orstein-Uhlenbeck process and is not affected by the spiking activity. The axonal compartment, corresponding to the spike initiation site, is described by a simplified RC circuit. Estimators of the mean and variance of the input, based on a sampling of the axonal membrane potential, were derived and applied to simulated data. The dependencies of the mean firing frequency and of the coefficient of variation and serial correlation of interspike intervals on the mean and variance of the input were also studied by computer simulation in both 1- and 2-point models. The main... |
| Tipo: Journal Article |
Palavras-chave: FREQUENCE LINEAIRE; NEURONE; BRUIT. |
| Ano: 1995 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9600003053057621&uri=/notices/prodinra1/2010/11/ |
| |
|
|
| Jarriault, D.; Gadenne, C.; Rospars, J.P.; Anton, S.. |
| To find a mating partner, moths rely on pheromone communication. Released in very low amounts, female sex pheromones are used by males to identify and localize females. Depending on the physiological state (i.e. age, reproductive state), the olfactory system of the males of the noctuid moth Agrotis ipsilon is `switched on or off'. To understand the neural basis of this behavioural plasticity, we performed a detailed characterization of the qualitative, quantitative and temporal aspects of pheromone coding in the primary centre of integration of pheromonal information, the macroglomerular complex (MGC) of the antennal lobe. MGC neurons were intracellularly recorded and stained in sexually mature virgin males. When stimulating antennae of males with the... |
| Tipo: Journal Article |
Palavras-chave: AGROTIS IPSILON; ARTHROPODA; HEXAPODA; INSECTE; PHEROMONE; MITE; PLASTICITE; ATTRACTIF SEXUEL; NEURONE; OLFACTION; LOBE ANTENNAIRE OLFACTORY CODING; MOTH; ANTENNAL LOBE; SEX-PHEROMONE; PROJECTION NEURON; SPIKE TRAIN ANALYSIS. |
| Ano: 2009 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010352d8cb4&uri=/notices/prodinra1/2010/10/ |
| |
| Registros recuperados: 26 | |
|
|
|
