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https://www.readbyqxmd.com/read/28895150/chemosensory-function-before-and-after-multimodal-treatment-in-chronic-rhinosinusitis-patients
#1
Ute Walliczek-Dworschak, Robert Pellegrino, Franziska Taube, Christian A Mueller, Boris Alexander Stuck, Philipp Dworschak, Christian Güldner, Silke Steinbach
OBJECTIVES/HYPOTHESIS: Olfactory dysfunction is common among the general population, with chronic rhinosinusitis (CRS) as one of the leading causes. Patients affected by CRS often report changes in taste sensations; however, quantitative measurements have not been performed to date. Therefore, the present study aimed to investigate gustatory and olfactory function in CRS patients prior to and after multimodal treatment. STUDY DESIGN: Prospective cohort study. METHODS: Twenty-one patients suffering from CRS with nasal polyps (14 male, seven female) with a mean age of 48 ± 15 years were included in the study...
September 12, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28894232/antennal-transcriptome-and-expression-analyses-of-olfactory-genes-in-the-sweetpotato-weevil-cylas-formicarius
#2
Shu-Ying Bin, Meng-Qiu Qu, Xin-Hua Pu, Zhong-Zhen Wu, Jin-Tian Lin
The sweetpotato weevil, Cylas formicarius (Fabricius), is a serious pest of sweetpotato. Olfaction-based approaches, such as use of synthetic sex pheromones to monitor populations and the bait-and-kill method to eliminate males, have been applied successfully for population management of C. formicarius. However, the molecular basis of olfaction in C. formicarius remains unknown. In this study, we produced antennal transcriptomes from males and females of C. formicarius using high-throughput sequencing to identify gene families associated with odorant detection...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28889974/ionotropic-receptors-mediate-drosophila-oviposition-preference-through-sour-gustatory-receptor-neurons
#3
Yan Chen, Hubert Amrein
Carboxylic acids are present in many foods, being especially abundant in fruits. Yet, relatively little is known about how acids are detected by gustatory systems and whether they have a potential role in nutrition or provide other health benefits. Here we identify sour gustatory receptor neurons (GRNs) in tarsal taste sensilla of Drosophila melanogaster. We find that most tarsal sensilla harbor a sour GRN that is specifically activated by carboxylic and mineral acids but does not respond to sweet- and bitter-tasting chemicals or salt...
August 31, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28888431/thermal-pest-control-in-tannat-grapes-effect-on-anthocyanins-sensory-and-color-of-one-year-old-wines
#4
Taísa Ceratti Treptow, Carine Gláucia Comarella, Fernanda Wouters Franco, Eliseu Rodrigues, Fabrício Domingues, Vivian Caetano Bochi, Cláudia Kaehler Sautter
Thermal pest control (TPC) is a technology that applies heated air in the vineyard to reduce pests. However, it can also alter grape anthocyanin synthesis in answer to temperature stress. The aim of this work was to determine the impact of TPC in 'Tannat' grape vineyards on wine quality. The major makers of quality considered in this study were the wine anthocyanin characterization by HPLC-PDA-MS(n), beverage's sensory evaluation by descriptive analysis, and color parameters by instrumental analysis. A total of three experiments were performed in different harvesting years...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28875566/structure-and-development-of-the-subesophageal-zone-of-the-drosophila-brain-ii-sensory-compartments
#5
Sarah Kendroud, Ali Asgar Bohra, Philipp A Kuert, Bao Nguyen, Oriane Guillermin, Simon G Sprecher, Heinrich Reichert, Krishnaswamy VijayRaghavan, Volker Hartenstein
The subesophageal zone (SEZ) of the Drosophila brain processes mechanosensory and gustatory sensory input from sensilla located on the head, mouth cavity and trunk. Motor output from the SEZ directly controls the movements involved in feeding behavior. In an accompanying paper (Hartenstein et al., 2017) we analyzed the systems of fiber tracts and secondary lineages to establish reliable criteria for defining boundaries between the four neuromeres of the SEZ, as well as discrete longitudinal neuropil domains within each SEZ neuromere...
September 6, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28870428/retro-and-orthonasal-olfactory-function-in-relation-to-olfactory-bulb-volume-in-patients-with-hypogonadotrophic-hypogonadism
#6
Murat Salihoglu, Onuralp Kurt, Seyid Ahmet Ay, Kamil Baskoy, Aytug Altundag, Muzaffer Saglam, Ferhat Deniz, Hakan Tekeli, Arif Yonem, Thomas Hummel
INTRODUCTION: Idiopathic hypogonadotrophic hypogonadism (IHH) with an olfactory deficit is defined as Kallmann syndrome (KS) and is distinct from normosmic IHH. OBJECTIVE: Because olfactory perception not only consists of orthonasally gained impressions but also involves retronasal olfactory function, in this study we decided to comprehensively evaluate both retronasal and orthonasal olfaction in patients with IHH. METHODS: This case-control study included 31 controls and 45 IHH patients...
August 24, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28866029/similarities-in-smell-and-taste-preferences-in-couples-increase-with-relationship-duration
#7
Agata Groyecka, Agnieszka Sorokowska, Anna Oleszkiewicz, Thomas Hummel, Krystyna Łysenko, Piotr Sorokowski
Numerous studies point to partners' congruence in various domains and note an increase in their compatibility over time. However, none have explored a shift in chemosensory perception related to relationship duration. Here, we examined the relationship between the time heterosexual couples have spent together and the degree to which they share their gustatory and olfactory preferences. Additionally, we investigated whether these preferences are associated with relationship satisfaction. One-hundred couples aged from 18 to 68 years being together for a period between 3 and 540 months rated the pleasantness of a wide variety of olfactory and gustatory stimuli...
August 31, 2017: Appetite
https://www.readbyqxmd.com/read/28861746/trigemino-gustatory-interactions-a-randomized-controlled-clinical-trial-assessing-the-effects-of-selective-anesthesia-of-dental-afferents-on-taste-thresholds
#8
Papa Abdou Lecor, Babacar Touré, Yves Boucher
OBJECTIVES: This study aimed at analyzing the effect of the temporary removal of trigeminal dental afferents on electrogustometric thresholds (EGMt). MATERIAL AND METHODS: EGMt were measured in 300 healthy subjects randomized in three groups, in nine loci on the right and left side (RS, LS) of the tongue surface before and after anesthesia. Group IAN (n = 56 RS, n = 44 LS) received intraosseous local anesthesia of the inferior alveolar nerve (IAN). Group MdN received mandibular nerve (MdN) block targeting IAN before its entrance into the mandibular foramen (n = 60, RS, and n = 40, LS); group MxN receiving maxillary nerve (MxN) anesthesia (n = 56 RS and n = 44 LS) was the control group...
August 31, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28857341/the-multidimensional-ionotropic-receptors-of-drosophila-melanogaster
#9
REVIEW
S Rimal, Y Lee
Ionotropic receptors (IRs), which form ion channels, can be categorized into conserved 'antennal IRs', which define the first olfactory receptor family of insects, and species-specific 'divergent IRs', which are expressed in gustatory receptor neurones. These receptors are located primarily in cell bodies and dendrites, and are highly enriched in the tips of the dendritic terminals that convey sensory information to higher brain centres. Antennal IRs play important roles in odour and thermosensation, whereas divergent IRs are involved in other important biological processes such as taste sensation...
August 31, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28856690/the-transcription-factor-phox2b-distinguishes-between-oral-and-non-oral-sensory-neurons-in-the-geniculate-ganglion
#10
Lisa Ohman-Gault, Tao Huang, Robin Krimm
Many basic characteristics of gustatory neurons remain unknown, partly due to the absence of specific markers. Some neurons in the geniculate ganglion project to taste regions in the oral cavity, whereas others innervate the outer ear. We hypothesized that the transcription factor Phox2b would identify oral cavity-projecting neurons in the geniculate ganglion. To test this possibility, we characterized mice in which Phox2b-Cre mediated gene recombination labeled neurons with tdTomato. Nerve labeling revealed that all taste neurons projecting through the chorda tympani (27%) and greater superficial petrosal nerves (15%) expressed Phox2b during development, whereas non-oral somatosensory neurons (58%) in the geniculate ganglion did not...
August 30, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28846687/%C3%AE-catenin-is-required-for-taste-bud-cell-renewal-and-behavioral-taste-perception-in-adult-mice
#11
Dany Gaillard, Spencer G Bowles, Ernesto Salcedo, Mingang Xu, Sarah E Millar, Linda A Barlow
Taste stimuli are transduced by taste buds and transmitted to the brain via afferent gustatory fibers. Renewal of taste receptor cells from actively dividing progenitors is finely tuned to maintain taste sensitivity throughout life. We show that conditional β-catenin deletion in mouse taste progenitors leads to rapid depletion of progenitors and Shh+ precursors, which in turn causes taste bud loss, followed by loss of gustatory nerve fibers. In addition, our data suggest LEF1, TCF7 and Wnt3 are involved in a Wnt pathway regulatory feedback loop that controls taste cell renewal in the circumvallate papilla epithelium...
August 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28839208/sensory-mutations-in-drosophila-melanogaster-influence-associational-effects-between-resources-during-oviposition
#12
Thomas A Verschut, Mikael A Carlsson, Peter Anderson, Peter A Hambäck
Neighboring resources can affect insect oviposition behavior when the complexity of sensory information obscures information about host resource availability in heterogeneous resource patches. These effects are referred to as associational effects and are hypothesized to occur through constraints in the sensory processing of the insect during host search, resulting into suboptimal resource use. Because the possibilities to study these constraints on naturally occurring animals are limited, we instead used sensory mutants of Drosophila melanogaster to determine the importance of sensory information in the occurrence of associational effects...
August 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28836349/variation-in-floral-characters-particularly-floral-scent-in-sapromyophilous-stemona-species
#13
Gao Chen, Wei-Chang Gong, Jia Ge, Johann Schinnerl, Bin Wang, Wei-Bang Sun
Flowers or inflorescences often deploy various signals, including visual, olfactory, and gustatory cues, that can be detected by their pollinators. In many plants, these cues and their functions are poorly understood. Deciphering the interactions between floral cues and pollinators is crucial for analyzing the reproductive success of flowering plants. In this study, we examined the composition of the fetid floral scents produced by several Stemona species, including nine S. tuberosa populations from across China, using dynamic headspace adsorption, gas chromatography, and mass spectrometry techniques...
August 24, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28833941/ultrastructure-and-distribution-of-antennal-sensilla-of-the-chilli-thrips-scirtothrips-dorsalis-hood-thysanoptera-thripidae
#14
Wenjing Zhu, Shihao Zhou, Shijie Wang, Dongyin Han, Junyu Chen, Yueguan Fu
The chilli thrips, Scirtothrips dorsalis Hood, is a serious pest of numerous important vegetable and ornamental crops. Various signals, especially phytochemical cues, determine the behavior of the phytophagous thrips at host selection. The sensory abilities of S. dorsalis are poorly understood although the antennae of adult are known to possess important sensory structures in orther insects. In this study, the morphology, distribution, and ultrastructure of the antennal sensilla of the S. dorsalis were examined by using scanning and transmission electron microscopy...
August 21, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28831098/rna-seq-analysis-on-chicken-taste-sensory-organs-an-ideal-system-to-study-organogenesis
#15
Xiaogang Cui, Brett Marshall, Ning Shi, Shi-You Chen, Romdhane Rekaya, Hong-Xiang Liu
RNA-Seq is a powerful tool in transcriptomic profiling of cells and tissues. We recently identified many more taste buds than previously appreciated in chickens using molecular markers to stain oral epithelial sheets of the palate, base of oral cavity, and posterior tongue. In this study, RNA-Seq was performed to understand the transcriptomic architecture of chicken gustatory tissues. Interestingly, taste sensation related genes and many more differentially expressed genes (DEGs) were found between the epithelium and mesenchyme in the base of oral cavity as compared to the palate and posterior tongue...
August 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28827648/taste-of-breath-the-temporal-order-of-taste-and-smell-synchronized-with-breathing-as-a-determinant-for-taste-and-olfactory-integration
#16
Yuya Kakutani, Takuji Narumi, Tatsu Kobayakawa, Takayuki Kawai, Yuko Kusakabe, Satomi Kunieda, Yuji Wada
Many studies have reported that subjective taste intensity is enhanced by odors which are congruent, for example a sweet taste and a vanilla odor. Some reports have suggested that subjective taste is more strongly enhanced by retronasal than by orthonasal odors; others have suggested that taste enhancements by both odor routes are identical. Differences between the two routes include the direction of airflow accompanying breath. Thus, it is possible that the order of gustatory and olfactory stimuli when breathing through either route while drinking is a determining factor for taste-odor integration...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28825966/molecular-characterization-of-sugar-taste-receptors-in-cotton-bollworm-helicoverpa-armigera
#17
Wei Xu, Nai-Yong Liu, Yalin Liao, Alisha Anderson
Insects utilize sugars as their essential energy and nutrient sources; therefore, the sense of sugar detection plays a critical role in insect behaviours. Previously using genomic and transcriptomic approaches, we identified eight putative sugar gustatory receptor (GR) genes from the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae). Here we further validated these annotated sugar receptor genes (HarmGr4-8 and 10-12) and found HarmGr10 may be a pseudogene carrying a stop codon in the open reading frame (ORF)...
August 21, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28812416/role-of-branchiomotor-neurons-in-controlling-food-intake-of-zebrafish-larvae
#18
James R Allen, Kiran D Bhattacharyya, Emilia Asante, Badr Almadi, Kyle Schafer, Jeremy Davis, Jane Cox, Mark Voigt, John A Viator, Anand Chandrasekhar
The physical act of eating or feeding involves the coordinated action of several organs like eyes and jaws, and associated neural networks. Moreover, the activity of the neural networks controlling jaw movements (branchiomotor circuits) is regulated by the visual, olfactory, gustatory and hypothalamic systems, which are largely well characterized at the physiological level. By contrast, the behavioral output of the branchiomotor circuits and the functional consequences of disruption of these circuits by abnormal neural development are poorly understood...
August 16, 2017: Journal of Neurogenetics
https://www.readbyqxmd.com/read/28805439/ratios-and-effect-size
#19
Jasper Robinson
Responding to a related pair of measurements is often expressed as a single discrimination ratio. Authors have used various discrimination ratios; yet, little information exists to guide their choice. A second use of ratios is to correct for the influence of a nuisance variable on the measurement of interest. I examine 4 discrimination ratios using simulated data sets. Three ratios, of the form a/(a + b), b/(a + b), and (a - b)/(a + b), introduced distortions to their raw data. The fourth ratio, (b - a)/b largely avoided such distortions and was the most sensitive at detecting statistical differences...
August 14, 2017: Journal of Experimental Psychology. Animal Learning and Cognition
https://www.readbyqxmd.com/read/28803876/distasteful-nectar-deters-floral-robbery
#20
Sarah E Barlow, Geraldine A Wright, Carolyn Ma, Marta Barberis, Iain W Farrell, Emily C Marr, Alice Brankin, Bruce M Pavlik, Philip C Stevenson
Toxic nectar is an ecological paradox [1, 2]. Plants divert substantial resources to produce nectar that attracts pollinators [3], but toxins in this reward could disrupt the mutualism and reduce plant fitness [4]. Alternatively, such compounds could protect nectar from robbers [2], provided that they do not significantly alter pollinator visitation to the detriment of plant fitness [1, 5-8]. Indeed, very few studies have investigated the role of plant toxins in nectar for defense against nectar robbers [4, 9, 10]...
August 21, 2017: Current Biology: CB
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