Base de dados : MEDLINE
Pesquisa : A13.093 [Categoria DeCS]
Referências encontradas : 815 [refinar]
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  1 / 815 MEDLINE  
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[PMID]:29351552
[Au] Autor:Kropf J; Rössler W
[Ad] Endereço:Behavioral Physiology and Sociobiology (Zoology II), Biozentrum, University of Würzburg, Würzburg, Germany.
[Ti] Título:In-situ recording of ionic currents in projection neurons and Kenyon cells in the olfactory pathway of the honeybee.
[So] Source:PLoS One;13(1):e0191425, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The honeybee olfactory pathway comprises an intriguing pattern of convergence and divergence: ~60.000 olfactory sensory neurons (OSN) convey olfactory information on ~900 projection neurons (PN) in the antennal lobe (AL). To transmit this information reliably, PNs employ relatively high spiking frequencies with complex patterns. PNs project via a dual olfactory pathway to the mushroom bodies (MB). This pathway comprises the medial (m-ALT) and the lateral antennal lobe tract (l-ALT). PNs from both tracts transmit information from a wide range of similar odors, but with distinct differences in coding properties. In the MBs, PNs form synapses with many Kenyon cells (KC) that encode odors in a spatially and temporally sparse way. The transformation from complex information coding to sparse coding is a well-known phenomenon in insect olfactory coding. Intrinsic neuronal properties as well as GABAergic inhibition are thought to contribute to this change in odor representation. In the present study, we identified intrinsic neuronal properties promoting coding differences between PNs and KCs using in-situ patch-clamp recordings in the intact brain. We found very prominent K+ currents in KCs clearly differing from the PN currents. This suggests that odor coding differences between PNs and KCs may be caused by differences in their specific ion channel properties. Comparison of ionic currents of m- and l-ALT PNs did not reveal any differences at a qualitative level.
[Mh] Termos MeSH primário: Abelhas/citologia
Abelhas/fisiologia
Condutos Olfatórios/citologia
Condutos Olfatórios/fisiologia
[Mh] Termos MeSH secundário: Potenciais de Ação
Animais
Antenas de Artrópodes/citologia
Antenas de Artrópodes/fisiologia
Encéfalo/citologia
Encéfalo/fisiologia
Fenômenos Eletrofisiológicos
Canais Iônicos/fisiologia
Transporte de Íons
Corpos Pedunculados/citologia
Corpos Pedunculados/fisiologia
Neurônios Receptores Olfatórios/citologia
Neurônios Receptores Olfatórios/fisiologia
Técnicas de Patch-Clamp
Olfato/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Ion Channels)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180120
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191425


  2 / 815 MEDLINE  
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[PMID]:29194737
[Au] Autor:Takada T; Sasaki T; Sato R; Kikuta S; Inoue MN
[Ad] Endereço:Graduate School of Bio-Applications and Systems Engineering (BASE), Tokyo University of Agriculture and Technology, Koganei, Japan.
[Ti] Título:Differential expression of a fructose receptor gene in honey bee workers according to age and behavioral role.
[So] Source:Arch Insect Biochem Physiol;97(2), 2018 Feb.
[Is] ISSN:1520-6327
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Honey bee (Apis mellifera) workers contribute to the maintenance of colonies in various ways. The primary functions of workers are divided into two types depending on age: young workers (nurses) primarily engage in such behaviors as cleaning and food handling within the hive, whereas older workers (foragers) acquire floral nutrients beyond the colony. Concomitant with this age-dependent change in activity, physiological changes occur in the tissues and organs of workers. Nurses supply younger larvae with honey containing high levels of glucose and supply older larvae with honey containing high levels of fructose. Given that nurses must determine both the concentration and type of sugar used in honey, gustatory receptors (Gr) expressed in the chemosensory organs likely play a role in distinguishing between sugars. Glucose is recognized by Gr1 in honey bees (AmGr1); however, it remains unclear which Gr are responsible for fructose recognition. This study aimed to identify fructose receptors in honey bees and reported that AmGr3, when transiently expressed in Xenopus oocytes, responded only to fructose, and to no other sugars. We analyzed expression levels of AmGr3 to identify which tissues and organs of workers are involved in fructose recognition and determined that expression of AmGr3 was particularly high in the antennae and legs of nurses. Our results suggest that nurses use their antennae and legs to recognize fructose, and that AmGr3 functions as an accurate nutrient sensor used to maintain food quality in honey bee hives.
[Mh] Termos MeSH primário: Antenas de Artrópodes/metabolismo
Abelhas/metabolismo
Frutose/metabolismo
Proteínas de Insetos/metabolismo
Receptores de Superfície Celular/metabolismo
[Mh] Termos MeSH secundário: Fatores Etários
Animais
Abelhas/genética
Comportamento Animal
Xenopus
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Insect Proteins); 0 (Receptors, Cell Surface); 30237-26-4 (Fructose)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180216
[Lr] Data última revisão:
180216
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171202
[St] Status:MEDLINE
[do] DOI:10.1002/arch.21437


  3 / 815 MEDLINE  
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[PMID]:29317624
[Au] Autor:Clemens J; Ozeri-Engelhard N; Murthy M
[Ad] Endereço:Princeton Neuroscience Institute, Princeton University, Princeton, NJ, 08540, USA.
[Ti] Título:Fast intensity adaptation enhances the encoding of sound in Drosophila.
[So] Source:Nat Commun;9(1):134, 2018 01 09.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:To faithfully encode complex stimuli, sensory neurons should correct, via adaptation, for stimulus properties that corrupt pattern recognition. Here we investigate sound intensity adaptation in the Drosophila auditory system, which is largely devoted to processing courtship song. Mechanosensory neurons (JONs) in the antenna are sensitive not only to sound-induced antennal vibrations, but also to wind or gravity, which affect the antenna's mean position. Song pattern recognition, therefore, requires adaptation to antennal position (stimulus mean) in addition to sound intensity (stimulus variance). We discover fast variance adaptation in Drosophila JONs, which corrects for background noise over the behaviorally relevant intensity range. We determine where mean and variance adaptation arises and how they interact. A computational model explains our results using a sequence of subtractive and divisive adaptation modules, interleaved by rectification. These results lay the foundation for identifying the molecular and biophysical implementation of adaptation to the statistics of natural sensory stimuli.
[Mh] Termos MeSH primário: Adaptação Fisiológica
Antenas de Artrópodes/fisiologia
Drosophila/fisiologia
Mecanorreceptores/fisiologia
Vocalização Animal
[Mh] Termos MeSH secundário: Animais
Feminino
Audição/fisiologia
Mecanotransdução Celular
Comportamento Sexual Animal
Som
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180111
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02453-9


  4 / 815 MEDLINE  
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[PMID]:29287108
[Au] Autor:Germinara GS; Ganassi S; Pistillo MO; Di Domenico C; De Cristofaro A; Di Palma AM
[Ad] Endereço:Department of the Sciences of Agriculture, Food and Environment, University of Foggia, Foggia, Italy.
[Ti] Título:Antennal olfactory responses of adult meadow spittlebug, Philaenus spumarius, to volatile organic compounds (VOCs).
[So] Source:PLoS One;12(12):e0190454, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The meadow spittlebug, Philaenus spumarius L. (Hemiptera, Aphrophoridae) is a commonly found vector of Xylella fastidiosa Wells et al. (1987) strain subspecies pauca associated with the "Olive Quick Decline Syndrome" in Italy. To contribute to the knowledge of the adult P. spumarius chemoreceptivity, electroantennographic (EAG) responses of both sexes to 50 volatile organic compounds (VOCs) including aliphatic aldehydes, alcohols, esters, and ketones, terpenoids, and aromatics were recorded. Measurable EAG responses were elicited by all compounds tested. In both sexes, octanal, 2-octanol, 2-decanone, (E)-2-hexenyl acetate, and vanillin elicited the strongest antennal amplitude within the chemical groups of aliphatic saturated aldehydes, aliphatic alcohols, aliphatic acetates and aromatics, respectively. Male and female EAG responses to sulcatol, (±)linalool, and sulcatone were higher than those to other terpenoinds. In both sexes, the weakest antennal stimulants were phenethyl alcohol and 2-pentanone. Sexual differences in the EAG amplitude were found only for four of test compounds suggesting a general similarity between males and females in antennal sensitivity. The olfactory system of both sexes proved to be sensitive to changes in stimulus concentration, carbon chain length, and compound structure. Compounds with short carbon chain length (C5-C6) elicited lower EAG amplitudes than compounds with higher carbon chain length (C9-C10) in all classes of aliphatic hydrocarbons with different functional groups. The elucidation of the sensitivity profile of P. spumarius to a variety of VOCs provides a basis for future identification of behaviorally-active compounds useful for developing semiochemical-based control strategies of this pest.
[Mh] Termos MeSH primário: Antenas de Artrópodes/fisiologia
Hemípteros/fisiologia
Olfato/fisiologia
Compostos Orgânicos Voláteis
[Mh] Termos MeSH secundário: Animais
Feminino
Masculino
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Volatile Organic Compounds)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180207
[Lr] Data última revisão:
180207
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171230
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190454


  5 / 815 MEDLINE  
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[PMID]:29304134
[Au] Autor:Jia X; Zhang X; Liu H; Wang R; Zhang T
[Ad] Endereço:Institute of Plant Protection, Hebei Academy of Agriculture and Forestry Sciences/Integrated Pest Management Center of Hebei Province/Key Laboratory of IPM on Crops in Northern Region of North China, Ministry of Agriculture, Baoding, P. R. China.
[Ti] Título:Identification of chemosensory genes from the antennal transcriptome of Indian meal moth Plodia interpunctella.
[So] Source:PLoS One;13(1):e0189889, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Olfaction plays an indispensable role in mediating insect behavior, such as locating host plants, mating partners, and avoidance of toxins and predators. Olfactory-related proteins are required for olfactory perception of insects. However, very few olfactory-related genes have been reported in Plodia interpunctella up to now. In the present study, we sequenced the antennae transcriptome of P. interpunctella using the next-generation sequencing technology, and identified 117 candidate olfactory-related genes, including 29 odorant-binding proteins (OBPs), 15 chemosensory proteins (CSPs), three sensory neuron membrane proteins (SNMPs), 47 odorant receptors (ORs), 14 ionotropic receptors (IRs) and nine gustatory receptors (GRs). Further analysis of qRT-PCR revealed that nine OBPs, three CSPs, two SNMPs, nine ORs and two GRs were specifically expressed in the male antennae, whereas eight OBPs, six CSPs, one SNMP, 16 ORs, two GRs and seven IRs significantly expressed in the female antennae. Taken together, our results provided useful information for further functional studies on insect genes related to recognition of pheromone and odorant, which might be meaningful targets for pest management.
[Mh] Termos MeSH primário: Antenas de Artrópodes/metabolismo
Mariposas/genética
Olfato/genética
Transcriptoma
[Mh] Termos MeSH secundário: Animais
Proteínas de Insetos/metabolismo
Reação em Cadeia da Polimerase em Tempo Real
Células Receptoras Sensoriais/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Insect Proteins)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180129
[Lr] Data última revisão:
180129
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180106
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189889


  6 / 815 MEDLINE  
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[PMID]:28745638
[Au] Autor:Xu X; You Y; Zhang L
[Ad] Endereço:Department of Entomology, China Agricultural University.
[Ti] Título:Localization of Odorant Receptor Genes in Locust Antennae by RNA In Situ Hybridization.
[So] Source:J Vis Exp;(125), 2017 Jul 13.
[Is] ISSN:1940-087X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Insects have evolved sophisticated olfactory reception systems to sense exogenous chemical signals. These chemical signals are transduced by Olfactory Receptor Neurons (ORNs) housed in hair-like structures, called chemosensilla, of the antennae. On the ORNs' membranes, Odorant Receptors (ORs) are believed to be involved in odor coding. Thus, being able to identify genes localized to the ORNs is necessary to recognize OR genes, and provides a fundamental basis for further functional in situ studies. The RNA expression levels of specific ORs in insect antennae are very low, and preserving insect tissue for histology is challenging. Thus, it is difficult to localize an OR to a specific type of sensilla using RNA in situ hybridization. In this paper, a detailed and highly effective RNA in situ hybridization protocol particularly for lowly expressed OR genes of insects, is introduced. In addition, a specific OR gene was identified by conducting double-color fluorescent in situ hybridization experiments using a co-expressing receptor gene, Orco, as a marker.
[Mh] Termos MeSH primário: Antenas de Artrópodes/patologia
Gafanhotos/metabolismo
RNA/metabolismo
Receptores Odorantes/genética
[Mh] Termos MeSH secundário: Animais
Antenas de Artrópodes/metabolismo
Imuno-Histoquímica
Hibridização in Situ Fluorescente
Microscopia Confocal
Neurônios Receptores Olfatórios/metabolismo
Neurônios Receptores Olfatórios/patologia
Oligonucleotídeos Antissenso/química
Oligonucleotídeos Antissenso/metabolismo
Receptores Odorantes/metabolismo
Gravação em Vídeo
[Pt] Tipo de publicação:JOURNAL ARTICLE; VIDEO-AUDIO MEDIA
[Nm] Nome de substância:
0 (Oligonucleotides, Antisense); 0 (Receptors, Odorant); 63231-63-0 (RNA)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180126
[Lr] Data última revisão:
180126
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170727
[St] Status:MEDLINE
[do] DOI:10.3791/55924


  7 / 815 MEDLINE  
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[PMID]:29194457
[Au] Autor:Jacob V; Monsempès C; Rospars JP; Masson JB; Lucas P
[Ad] Endereço:Institute of Ecology and Environmental Sciences, INRA, route de St Cyr, Versailles, France.
[Ti] Título:Olfactory coding in the turbulent realm.
[So] Source:PLoS Comput Biol;13(12):e1005870, 2017 Dec.
[Is] ISSN:1553-7358
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Long-distance olfactory search behaviors depend on odor detection dynamics. Due to turbulence, olfactory signals travel as bursts of variable concentration and spacing and are characterized by long-tail distributions of odor/no-odor events, challenging the computing capacities of olfactory systems. How animals encode complex olfactory scenes to track the plume far from the source remains unclear. Here we focus on the coding of the plume temporal dynamics in moths. We compare responses of olfactory receptor neurons (ORNs) and antennal lobe projection neurons (PNs) to sequences of pheromone stimuli either with white-noise patterns or with realistic turbulent temporal structures simulating a large range of distances (8 to 64 m) from the odor source. For the first time, we analyze what information is extracted by the olfactory system at large distances from the source. Neuronal responses are analyzed using linear-nonlinear models fitted with white-noise stimuli and used for predicting responses to turbulent stimuli. We found that neuronal firing rate is less correlated with the dynamic odor time course when distance to the source increases because of improper coding during long odor and no-odor events that characterize large distances. Rapid adaptation during long puffs does not preclude however the detection of puff transitions in PNs. Individual PNs but not individual ORNs encode the onset and offset of odor puffs for any temporal structure of stimuli. A higher spontaneous firing rate coupled to an inhibition phase at the end of PN responses contributes to this coding property. This allows PNs to decode the temporal structure of the odor plume at any distance to the source, an essential piece of information moths can use in their tracking behavior.
[Mh] Termos MeSH primário: Comportamento Apetitivo/fisiologia
Antenas de Artrópodes/fisiologia
Condutos Olfatórios/fisiologia
Neurônios Receptores Olfatórios/fisiologia
Feromônios/metabolismo
[Mh] Termos MeSH secundário: Animais
Antenas de Artrópodes/citologia
Biologia Computacional/métodos
Masculino
Mariposas/fisiologia
Neurônios Receptores Olfatórios/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Pheromones)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180102
[Lr] Data última revisão:
180102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171202
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pcbi.1005870


  8 / 815 MEDLINE  
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[PMID]:28993484
[Au] Autor:Ai H; Kai K; Kumaraswamy A; Ikeno H; Wachtler T
[Ad] Endereço:Department of Earth System Science, Fukuoka University, Fukuoka 814-0180, Japan, ai@fukuoka-u.ac.jp.
[Ti] Título:Interneurons in the Honeybee Primary Auditory Center Responding to Waggle Dance-Like Vibration Pulses.
[So] Source:J Neurosci;37(44):10624-10635, 2017 Nov 01.
[Is] ISSN:1529-2401
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Female honeybees use the "waggle dance" to communicate the location of nectar sources to their hive mates. Distance information is encoded in the duration of the waggle phase (von Frisch, 1967). During the waggle phase, the dancer produces trains of vibration pulses, which are detected by the follower bees via Johnston's organ located on the antennae. To uncover the neural mechanisms underlying the encoding of distance information in the waggle dance follower, we investigated morphology, physiology, and immunohistochemistry of interneurons arborizing in the primary auditory center of the honeybee ( ). We identified major interneuron types, named DL-Int-1, DL-Int-2, and bilateral DL-dSEG-LP, that responded with different spiking patterns to vibration pulses applied to the antennae. Experimental and computational analyses suggest that inhibitory connection plays a role in encoding and processing the duration of vibration pulse trains in the primary auditory center of the honeybee. The waggle dance represents a form of symbolic communication used by honeybees to convey the location of food sources via species-specific sound. The brain mechanisms used to decipher this symbolic information are unknown. We examined interneurons in the honeybee primary auditory center and identified different neuron types with specific properties. The results of our computational analyses suggest that inhibitory connection plays a role in encoding waggle dance signals. Our results are critical for understanding how the honeybee deciphers information from the sound produced by the waggle dance and provide new insights regarding how common neural mechanisms are used by different species to achieve communication.
[Mh] Termos MeSH primário: Comunicação Animal
Córtex Auditivo/fisiologia
Dança/fisiologia
Interneurônios/fisiologia
Vibração
[Mh] Termos MeSH secundário: Animais
Antenas de Artrópodes/fisiologia
Córtex Auditivo/citologia
Abelhas
Feminino
Atividade Motora/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171113
[Lr] Data última revisão:
171113
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171011
[St] Status:MEDLINE
[do] DOI:10.1523/JNEUROSCI.0044-17.2017


  9 / 815 MEDLINE  
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[PMID]:28973484
[Au] Autor:Lin X; Zhang L; Jiang Y
[Ad] Endereço:College of Life Sciences, China Jiliang University, Hangzhou 310018, China.
[Ti] Título:Characterization of Spodoptera litura (Lepidoptera: Noctuidae) Takeout Genes and Their Differential Responses to Insecticides and Sex Pheromone.
[So] Source:J Insect Sci;17(4), 2017 Jul 01.
[Is] ISSN:1536-2442
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Spodoptera litura (S. litura) is one of the most serious agricultural insect pests worldwide. Takeout (TO) is involved in a variety of physiological and biochemical pathways and performs various biological functions. We characterized 18 S. litura TO genes and investigated their differential responses to insecticides and sex pheromones. All predicted TO proteins have two Cysteines that are unique to the N-terminal of the TO family proteins and contain four highly conserved Prolines, two Glycines, and one Tyrosine. The expression levels of seven TO genes in the male antennae were higher than those in the female antennae, although the expression levels of 10 TO genes in the female were higher than those in the male. We investigated the effects of the sex pheromone and three insecticides, that is, chlorpyrifos (Ch), emamectin benzoate (EB), and fipronil (Fi), on the expression levels of the TO genes in the antennae. The results showed that the insecticides and sex pheromone affect the expression levels of the TO genes. One day after the treatment, the expression levels of SlTO15 and SlTO4 were significantly induced by the Ch/EB treatment. Two days after the S. litura moths were treated with Fi, the expression of SlTO4 was significantly induced (28.35-fold). The expression of SlTO10 changed significantly after the Ch and EB treatment, although the expression of SlTO12 and SlTO15 was inhibited by the three insecticides after two days of treatment. Our results lay a foundation for studying the role of TO genes in the interaction between insecticides and sex pheromone.
[Mh] Termos MeSH primário: Resistência a Inseticidas/genética
Atrativos Sexuais/fisiologia
Spodoptera/genética
[Mh] Termos MeSH secundário: Animais
Antenas de Artrópodes/metabolismo
Feminino
Expressão Gênica
Genes de Insetos
Masculino
Família Multigênica
Análise de Sequência de DNA
Spodoptera/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Sex Attractants)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171025
[Lr] Data última revisão:
171025
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171004
[St] Status:MEDLINE
[do] DOI:10.1093/jisesa/iex061


  10 / 815 MEDLINE  
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[PMID]:28943231
[Au] Autor:Azevedo AW; Wilson RI
[Ad] Endereço:Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.
[Ti] Título:Active Mechanisms of Vibration Encoding and Frequency Filtering in Central Mechanosensory Neurons.
[So] Source:Neuron;96(2):446-460.e9, 2017 Oct 11.
[Is] ISSN:1097-4199
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:To better understand biophysical mechanisms of mechanosensory processing, we investigated two cell types in the Drosophila brain (A2 and B1 cells) that are postsynaptic to antennal vibration receptors. A2 cells receive excitatory synaptic currents in response to both directions of movement: thus, twice per vibration cycle. The membrane acts as a low-pass filter, so that voltage and spiking mainly track the vibration envelope rather than individual cycles. By contrast, B1 cells are excited by only forward or backward movement, meaning they are sensitive to vibration phase. They receive oscillatory synaptic currents at the stimulus frequency, and they bandpass filter these inputs to favor specific frequencies. Different cells prefer different frequencies, due to differences in their voltage-gated conductances. Both Na and K conductances suppress low-frequency synaptic inputs, so cells with larger voltage-gated conductances prefer higher frequencies. These results illustrate how membrane properties and voltage-gated conductances can extract distinct stimulus features into parallel channels.
[Mh] Termos MeSH primário: Antenas de Artrópodes/fisiologia
Encéfalo/fisiologia
Mecanotransdução Celular/fisiologia
Neurônios/fisiologia
Vibração
[Mh] Termos MeSH secundário: Animais
Animais Geneticamente Modificados
Antenas de Artrópodes/citologia
Encéfalo/citologia
Drosophila
Potenciais da Membrana/fisiologia
Canais de Potássio de Abertura Dependente da Tensão da Membrana/fisiologia
Canais de Sódio Disparados por Voltagem/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Potassium Channels, Voltage-Gated); 0 (Voltage-Gated Sodium Channels)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171020
[Lr] Data última revisão:
171020
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170926
[St] Status:MEDLINE



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BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde