keyword
MENU ▼
Read by QxMD icon Read
search

pheromones

keyword
https://www.readbyqxmd.com/read/28102357/a-single-identified-glomerulus-in-the-zebrafish-olfactory-bulb-carries-the-high-affinity-response-to-death-associated-odor-cadaverine
#1
Milan Dieris, Gaurav Ahuja, Venkatesh Krishna, Sigrun I Korsching
The death-associated odor cadaverine, generated by bacteria-mediated decarboxylation of lysine, has been described as the principal activator of a particular olfactory receptor in zebrafish, TAAR13c. Low concentrations of cadaverine activated mainly TAAR13c-expressing olfactory sensory neurons, suggesting TAAR13c as an important element of the neuronal processing pathway linking cadaverine stimulation to a strongly aversive innate behavioral response. Here, we characterized the initial steps of this neuronal pathway...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28100777/structure-activity-relationship-of-%C3%AE-mating-pheromone-from-the-fungal-pathogen-fusarium-oxysporum
#2
Stefania Vitale, Angélica Partida-Hanon, Soraya Serrano, Álvaro Martínez-Del-Pozo, Antonio Di Pietro, David Turrà, Marta Bruix
During sexual development, ascomycete fungi produce two types of peptide pheromones termed a and α. The α pheromone from the budding yeast Saccharomyces cerevisiae, a thirteen residue peptide which elicits cell cycle arrest and chemotropic growth, has served as paradigm for the interaction of small peptides with their cognate G protein-coupled receptors (GPCRs). However, no structural information is currently available for α pheromones from filamentous ascomycetes, which are significantly shorter and share almost no sequence similarity with the S...
January 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28100194/interspecies-transfer-of-vancomycin-erythromycin-and-tetracycline-resistance-among-enterococcus-species-recovered-from-agrarian-sources
#3
M Conwell, V Daniels, P J Naughton, J S G Dooley
BACKGROUND: Enterococci are now well recognised for their ability to transfer antibiotic resistance and for their association with nosocomial infections, but less is known regarding their relevance in the wider environment. Enterococcus faecalis and Enterococcus faecium were isolated from a range of agrarian associated sources (low-flow water, septic tank, poultry litter, high flow water, slurry/soil) and were assessed for latent ability to transfer antimicrobial resistance. RESULTS: The isolates were tested for phenotypic clumping in the presence of cell-free supernatant from other isolates...
January 18, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28098555/nematophagous-fungus-arthrobotrys-oligospora-mimics-olfactory-cues-of-sex-and-food-to-lure-its-nematode-prey
#4
Yen-Ping Hsueh, Matthew R Gronquist, Erich M Schwarz, Ravi David Nath, Ching-Han Lee, Shalha Gharib, Frank C Schroeder, Paul W Sternberg
To study the molecular basis for predator-prey coevolution, we investigated how Caenorhabditis elegans responds to the predatory fungus Arthrobotrys oligospora. C. elegans and other nematodes were attracted to volatile compounds produced by A. oligospora. Gas-chromatographic mass-spectral analyses of A. oligospora-derived volatile metabolites identified several odors mimicking food cues attractive to nematodes. One compound, methyl 3-methyl-2-butenoate (MMB) additionally triggered strong sex- and stage-specific attraction in several Caenorhabditis species...
January 18, 2017: ELife
https://www.readbyqxmd.com/read/28097605/elevated-carbon-dioxide-concentration-reduces-alarm-signaling-in-aphids
#5
Antoine Boullis, Bérénice Fassotte, Landry Sarles, Georges Lognay, Stéphanie Heuskin, Maryse Vanderplanck, Stefan Bartram, Eric Haubruge, Frédéric Francis, François J Verheggen
Insects often rely on olfaction to communicate with conspecifics. While the chemical language of insects has been deciphered in recent decades, few studies have assessed how changes in atmospheric greenhouse gas concentrations might impact pheromonal communication in insects. Here, we hypothesize that changes in the concentration of atmospheric carbon dioxide affect the whole dynamics of alarm signaling in aphids, including: (1) the production of the active compound (E)-β-farnesene (Eβf), (2) emission behavior when under attack, (3) perception by the olfactory apparatus, and (4) the escape response...
January 17, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28094781/ultrastructure-of-sensilla-of-antennae-and-ovipositor-of-sitotroga-cerealella-lepidoptera-gelechiidae-and-location-of-female-sex-pheromone-gland
#6
Min Ma, Meng-Meng Chang, Yan Lu, Chao-Liang Lei, Feng-Lian Yang
The Angoumois grain moth, Sitotroga cerealella, is a serious pest of stored grains worldwide. Presently, the best effective control against the moth is to disrupt the sexual communication between sexes. Sexual communication in moths includes two processes in which females produce and release pheromones from the sex pheromone gland and males detect and respond to them with a relatively sophisticated olfactory system in their antennae. To better understand these processes, we studied the ultrastructure of antennal and ovipositor sensilla of S...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28088352/mutations-at-the-darkener-of-apricot-locus-modulate-pheromone-production-and-sex-behavior-in-drosophila-melanogaster
#7
Julien Fumey, Claude Wicker-Thomas
Mutations at the Darkener of Apricot (Doa) locus of Drosophila melanogaster alter sexual differentiation by disrupting sex-specific splicing of doublesex pre-mRNA, a key regulator of sex determination. Here, we study the effect of seven Doa alleles and several trans-heterozygous combinations on pheromones and courtship behavior. The cuticular hydrocarbon (CHC) profile was slightly masculinized in females, with an accumulation of shorter compounds (C23 and C25) and a reduction in longer compounds (C27 and C29)...
January 11, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28078425/odorant-receptors-and-antennal-lobe-morphology-offer-a-new-approach-to-understanding-olfaction-in-the-asian-longhorned-beetle
#8
Robert F Mitchell, Loyal P Hall, Peter F Reagel, Duane D McKenna, Thomas C Baker, John G Hildebrand
The Asian longhorned beetle Anoplophora glabripennis (Motchulsky) is an exotic forest pest that has repeatedly invaded North America and Europe from Asia, and has the potential to kill millions of trees and cause billions of dollars in damage. Traps baited with an attractive mixture of volatile organic compounds from hosts have been of limited success in monitoring invasion sites. We propose that lures might be improved through studying the olfactory system of adult beetles, especially the gene family of odorant receptors (ORs) and the structure of the antennal lobes of the brain...
January 11, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28077617/calcineurin-the-ca2-dependent-phosphatase-regulates-rga2-a-cdc42-gtpase-activating-protein-to-modulate-pheromone-signaling
#9
Nina Ly, Martha S Cyert
Calcineurin, the conserved Ca(2+)/calmodulin-activated phosphatase, is required for viability during prolonged exposure to pheromone, and acts through multiple substrates to down regulate yeast pheromone signaling. Calcineurin regulates Dig2 and Rod1/Art4 to inhibit mating-induced gene expression and activate receptor internalization, respectively. Recent systematic approaches identified Rga2, a GTPase activating protein (GAP) for the Cdc42 Rho-type GTPase, as a calcineurin substrate. Here, we establish a physiological context for this regulation, and show that calcineurin dephosphorylates and positively regulates Rga2 during pheromone signaling...
January 11, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28073837/chronic-co-species-housing-mice-and-rats-increased-the-competitiveness-of-male-mice
#10
Ying-Juan Liu, Lai-Fu Li, Yao-Hua Zhang, Hui-Fen Guo, Min Xia, Meng-Wei Zhang, Xiao-Yuan Jing, Jing-Hua Zhang, Jian-Xu Zhang
Rats are predators of mice in nature. Nevertheless, it is a common practice to house mice and rats in a same room in some laboratories. In this study, we investigated the behavioral and physiological responsively of mice in long-term co-species housing conditions. Twenty-four male mice were randomly assigned to their original raising room (control) or a rat room (co-species-housed) for more than 6 weeks. In the open-field and light-dark box tests, the behaviors of the co-species-housed mice and controls were not different...
January 10, 2017: Chemical Senses
https://www.readbyqxmd.com/read/28073700/the-yeast-ste2p-g-protein-coupled-receptor-dimerizes-on-the-cell-plasma-membrane
#11
Orkun Cevheroğlu, Gözde Kumaş, Melinda Hauser, Jeffrey M Becker, Çağdaş D Son
Dimerization of G protein-coupled receptors (GPCR) may play an important role in maturation, internalization, signaling and/or pharmacology of these receptors. However, the location where dimerization occurs is still under debate. In our study, variants of Ste2p, a yeast mating pheromone GPCR, were tagged with split EGFP (enhanced green fluorescent protein) fragments inserted between transmembrane domain seven and the C-terminus or appended to the C-terminus. Bimolecular Fluorescence Complementation (BiFC) assay was used to determine where receptor dimerization occurred during protein trafficking by monitoring generation of EGFP fluorescence, which occurred upon GPCR dimerization...
January 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28072816/systematic-analysis-of-transcriptional-and-post-transcriptional-regulation-of-metabolism-in-yeast
#12
Emanuel Gonçalves, Zrinka Raguz Nakic, Mattia Zampieri, Omar Wagih, David Ochoa, Uwe Sauer, Pedro Beltrao, Julio Saez-Rodriguez
Cells react to extracellular perturbations with complex and intertwined responses. Systematic identification of the regulatory mechanisms that control these responses is still a challenge and requires tailored analyses integrating different types of molecular data. Here we acquired time-resolved metabolomics measurements in yeast under salt and pheromone stimulation and developed a machine learning approach to explore regulatory associations between metabolism and signal transduction. Existing phosphoproteomics measurements under the same conditions and kinase-substrate regulatory interactions were used to in silico estimate the enzymatic activity of signalling kinases...
January 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28070757/rnai-induced-electrophysiological-and-behavioral-changes-reveal-two-pheromone-binding-proteins-of-helicoverpa-armigera-involved-in-the-perception-of-the-main-sex-pheromone-component-z11-16-ald
#13
Kun Dong, Liang Sun, Jing-Tao Liu, Shao-Hua Gu, Jing-Jiang Zhou, Ruo-Nan Yang, Khalid Hussain Dhiloo, Xi-Wu Gao, Yu-Yuan Guo, Yong-Jun Zhang
Pheromone binding proteins (PBPs) are thought to play key roles in insect sex pheromone recognition; however, there is little in vivo evidence to support this viewpoint in comparison to abundant biochemical data in vitro. In the present study, two noctuid PBP genes HarmPBP1 and HarmPBP2 of the serious agricultural pest, Helicoverpa armigera were selected to be knocked down by RNA interference, and then the changes in electrophysiological and behavioral responses of male mutants to their major sex pheromone component (Z)-11-hexadecenal (Z11-16:Ald) were recorded...
January 9, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28067325/free-flight-odor-tracking-in-drosophila-effect-of-wing-chemosensors-sex-and-pheromonal-gene-regulation
#14
Benjamin Houot, Vincent Gigot, Alain Robichon, Jean-François Ferveur
The evolution of powered flight in insects had major consequences for global biodiversity and involved the acquisition of adaptive processes allowing individuals to disperse to new ecological niches. Flies use both vision and olfactory input from their antennae to guide their flight; chemosensors on fly wings have been described, but their function remains mysterious. We studied Drosophila flight in a wind tunnel. By genetically manipulating wing chemosensors, we show that these structures play an essential role in flight performance with a sex-specific effect...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28065711/a-comparison-of-the-effects-of-male-pheromone-priming-and-optogenetic-inhibition-of-accessory-olfactory-bulb-forebrain-inputs-on-the-sexual-behavior-of-estrous-female-mice
#15
E A McCarthy, T Kunkhyen, W J Korzan, A Naik, A Maqsudlu, J A Cherry, M J Baum
Previous research has shown that repeated testing with a stimulus male is required for ovariectomized, hormone-primed female mice to become sexually receptive (show maximal lordosis quotients; LQs) and that drug-induced, epigenetic enhancement of estradiol receptor function accelerated the improvement in LQs otherwise shown by estrous females with repeated testing. We asked whether pre-exposure to male pheromones ('pheromone priming') would also accelerate the improvement in LQs with repeated tests and whether optogenetic inhibition of accessory olfactory bulb (AOB) projection neurons could inhibit lordosis in sexually experienced estrous female mice...
January 5, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28065658/functional-plasticity-of-the-agrc-receptor-histidine-kinase-required-for-staphylococcal-virulence
#16
Boyuan Wang, Aishan Zhao, Qian Xie, Paul Dominic Olinares, Brian T Chait, Richard P Novick, Tom W Muir
Staphylococcus aureus employs the receptor histidine kinase (RHK), AgrC, to detect quorum-sensing (QS) pheromones, the autoinducer peptides (AIPs), which regulate the virulence of the bacterium. Variation in the QS circuit divides S. aureus into four subgroups, each producing a specific AIP-AgrC pair. While the timing of QS induction is known to differ among these subgroups, the molecular basis of this phenomenon is unknown. Here, we report the successful reconstitution of several AgrC variants and show that the agonist-induced activity of the receptors varies in a manner that accounts for these temporal differences in QS induction...
January 19, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28059141/the-molecular-sensory-machinery-of-a-chagas-disease-vector-expression-changes-through-imaginal-moult-and-sexually-dimorphic-features
#17
Jose Manuel Latorre-Estivalis, Hugh M Robertson, Kimberly K O Walden, Jerônimo Ruiz, Leilane Oliveira Gonçalves, Alessandra A Guarneri, Marcelo Gustavo Lorenzo
The triatomine bug Rhodnius prolixus is a main vector of Chagas disease, which affects several million people, mostly in Latin-America. Host searching, pheromone communication, and microclimatic preferences are aspects of its behaviour that depend on multimodal sensory inputs. The molecular bases of these sensory processes are largely unknown. The expression levels of genes transcribed in antennae were compared between 5(th) instar larvae, and female and male adults by means of RNA-Seq. The antennae of R. prolixus showed increased expression of several chemosensory-related genes in imaginal bugs, while both sexes had similar expression patterns for most target genes...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28056777/age-influences-the-olfactory-profiles-of-the-migratory-oriental-armyworm-mythimna-separate-at-the-molecular-level
#18
Yue-Qiu He, Bo Feng, Qian-Shuang Guo, Yongjun Du
BACKGROUND: The oriental armyworm Mythimna separata (Walk) is a serious migratory pest; however, studies on its olfactory response and its underlying molecular mechanism are limited. To gain insights to the olfactory mechanism of migration, olfactory genes were identified using antennal transcriptome analysis. The olfactory response and the expression of olfactory genes for 1-day and 5-day-old moths were respectively investigated by EAG and RT-qPCR analyses. RESULTS: Putative 126 olfactory genes were identified in M...
January 5, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28053210/monitoring-mexican-rice-borer-lepidoptera-crambidae-populations-in-sugarcane-and-rice-with-conventional-and-electronic-pheromone-traps
#19
B E Wilson, J M Beuzelin, M T VanWeelden, T E Reagan, M O Way
The Mexican rice borer, Eoreuma loftini (Dyar), is a major pest of sugarcane, Saccharum spp., rice, Oryza sativa L., and other graminaceous crops in Texas and Louisiana. The ability of conventional and electronic pheromone traps to monitor E. loftini in sugarcane and rice habitats was evaluated in two separate 2-yr field studies. Bucket traps baited with a synthetic female sex pheromone monitored E. loftini populations in commercial sugarcane fields in Calcasieu and Jefferson Davis Parishes throughout the 2014 and 2015 growing seasons...
January 4, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28049774/synchronization-and-arrest-of-the-budding-yeast-cell-cycle-using-chemical-and-genetic-methods
#20
Adam P Rosebrock
The cell cycle of budding yeast can be arrested at specific positions by different genetic and chemical methods. These arrests enable study of cell cycle phase-specific phenotypes that would be missed during examination of asynchronous cultures. Some methods for arrest are reversible, with kinetics that enable release of cells back into a synchronous cycling state. Benefits of chemical and genetic methods include scalability across a large range of culture sizes from a few milliliters to many liters, ease of execution, the absence of specific equipment requirements, and synchronization and release of the entire culture...
January 3, 2017: Cold Spring Harbor Protocols
keyword
keyword
119556
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"