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https://www.readbyqxmd.com/read/29343813/the-drosophila-gr28bd-product-is-a-non-specific-cation-channel-that-can-be-used-as-a-novel-thermogenetic-tool
#1
Aditi Mishra, Autoosa Salari, Benton R Berigan, Kayla C Miguel, Marzie Amirshenava, Abbey Robinson, Benjamin C Zars, Jenna L Lin, Lorin S Milescu, Mirela Milescu, Troy Zars
Extrinsic control of single neurons and neuronal populations is a powerful approach for understanding how neural circuits function. Adding new thermogenetic tools to existing optogenetic and other forms of intervention will increase the complexity of questions that can be addressed. A good candidate for developing new thermogenetic tools is the Drosophila gustatory receptor family, which has been implicated in high-temperature avoidance behavior. We examined the five members of the Gr28b gene cluster for temperature-dependent properties via three approaches: biophysical characterization in Xenopus oocytes, functional calcium imaging in Drosophila motor neurons, and behavioral assays in adult Drosophila...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29328505/substance-p-as-a-putative-efferent-transmitter-mediates-gabaergic-inhibition-in-mouse-taste-buds
#2
Anthony Y Huang, Sandy Y Wu
BACKGROUND AND PURPOSE: Capsaicin-mediated modulation on taste nerve responses is thought to be produced indirectly by actions of neuropeptides, e.g., calcitonin gene-related peptide (CGRP) and substance P (SP), onto taste cells implying playing a role in taste sensitivity. During processing gustatory information in taste buds, CGRP shapes peripheral taste signals via serotonergic signaling. The underlying assumption has been that SP exerts its effects on taste transmitter secretion in taste buds of mice...
January 12, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29324046/gustatory-processing-in-drosophila-melanogaster
#3
Kristin Scott
The ability to identify nutrient-rich food and avoid toxic substances is essential for an animal's survival. Although olfaction and vision contribute to food detection, the gustatory system acts as a final checkpoint control for food acceptance or rejection. The vinegar fly Drosophila melanogaster tastes many of the same stimuli as mammals and provides an excellent model system for comparative studies of taste detection. The relative simplicity of the fly brain and behaviors, along with the molecular genetic and functional approaches available in this system, allow the examination of gustatory neural circuits from sensory input to motor output...
January 7, 2018: Annual Review of Entomology
https://www.readbyqxmd.com/read/29315960/proton-change-of-parotid-glands-after-gustatory-stimulation-examined-by-magnetic-resonance-imaging
#4
Yi-Jui Liu, Yi-Hsiung Lee, Hing-Chiu Chang, Hui-Chu Chiu, Ta-Wei Chiu, Kang Hsu, Cheng-Ming Pen, Hsian-He Hsu, Chun-Jung Juan
The aim of this study was to investigate proton changes of the parotid gland after gustatory stimulation by semi-quantitative parameters and an empirical mathematical model (EMM) using high-temporal-resolution, double-echo, echo-planar imaging (EPI). Approved by a local institutional review board, this study examined 20 parotid glands from 10 healthy volunteers (male:female = 6: 4; age ± standard deviation =35.1 ± 14.1 years) with written informed consent obtained. All participants underwent 1.5-T, double-echo EPI with gustatory stimulation...
January 8, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29306960/decreased-electrogustometric-taste-sensitivity-in-patients-with-acquired-olfactory-dysfunction
#5
P Han, M Georgi, M Cuevas, A Haehner, V Gudziol, T Hummel
BACKGROUND: Cross-modal chemosensory dysfunction between olfaction and gustation is not well known. METHODOLOGY: 180 participants were classified into three groups (60 with olfactory dysfunction, 60 with gustatory dysfunction and 60 healthy controls without chemosensory dysfunction). Olfactory functions were obtained with Sniffin Sticks; gustatory function was measured by suprathreshold gustatory stimuli (taste sprays) and a quasi-threshold measure of taste function (taste strips) for five taste qualities (sweet, salty, sour, bitter and umami)...
January 7, 2018: Rhinology
https://www.readbyqxmd.com/read/29306957/analysis-of-taste-function-in-patients-before-and-after-cochlear-implant-surgery
#6
U Walliczek-Dworschak, C M Knauer, D Murbe, A Mainka, T Hummel
BACKGROUND: Cochlear implantation (CI), the standard therapy for rehabilitation of severe to profound sensorineural hearing loss, exhibits taste dysfunction as a possible postoperative complication. This study aimed to investigate possible postoperative changes in taste and in addition baseline taste function in CI candidates. METHODOLOGY: We included 61 patients (32 male, 29 female) planned to undergo CI surgery and 23 healthy controls (8 male, 15 female). Gustatory function was measured using a chemosensory quasi-threshold test (taste strips) and electrogustometry (EGM)...
January 7, 2018: Rhinology
https://www.readbyqxmd.com/read/29305535/an-insula-central-amygdala-circuit-for-guiding-tastant-reinforced-choice-behavior
#7
Hillary Schiff, Anna Lien Bouhuis, Kai Yu, Mario A Penzo, Haohong Li, Miao He, Bo Li
Predicting which substances are suitable for consumption during foraging is critical for animals to survive. Despite extensive study, the neural circuit mechanisms underlying such adaptive behavior remain poorly understood. Here we examined the anatomical and functional connectivity of the insular cortex (IC) to central amygdala (CeA) circuit and the role of this circuit in the establishment of appropriate behavioral responses in a tastant (sucrose/quinine)-reinforced "go/no-go" task in male and female mice...
January 5, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29304190/enhancement-of-saltiness-perception-by-monosodium-glutamate-taste-and-soy-sauce-odor-a-near-infrared-spectroscopy-study
#8
Takuya Onuma, Hiroaki Maruyama, Nobuyuki Sakai
Previous studies have reported that the umami taste of monosodium L-glutamate (MSG) and salty-smelling odors (e.g., soy sauce, bacon, sardines) enhance the perception of saltiness. This study aimed to investigate the neural basis of the enhancement of saltiness in human participants using functional near-infrared spectroscopy (fNIRS). University students who had passed a taste panel test participated in this study. Sodium chloride solutions were presented with or without either 0.10% MSG or the odor of soy sauce...
January 3, 2018: Chemical Senses
https://www.readbyqxmd.com/read/29304134/identification-of-chemosensory-genes-from-the-antennal-transcriptome-of-indian-meal-moth-plodia-interpunctella
#9
Xiaojian Jia, Xiaofang Zhang, Hongmin Liu, Rongyan Wang, Tao Zhang
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)...
2018: PloS One
https://www.readbyqxmd.com/read/29282595/perceptual-experience-norms-for-506-russian-nouns-modality-rating-spatial-localization-manipulability-imageability-and-other-variables
#10
Alex Miklashevsky
A number of new psycholinguistic variables has been proposed during the last years within embodied cognition framework: modality experience rating (i.e., relationship between words and images of a particular perceptive modality-visual, auditory, haptic etc.), manipulability (the necessity for an object to interact with human hands in order to perform its function), vertical spatial localization. However, it is not clear how these new variables are related to each other and to such traditional variables as imageability, AoA and word frequency...
December 27, 2017: Journal of Psycholinguistic Research
https://www.readbyqxmd.com/read/29281722/cortical-representation-of-different-taste-modalities-on-the-gustatory-cortex-a-pilot-study
#11
Anna Prinster, Elena Cantone, Viviana Verlezza, Mario Magliulo, Giovanni Sarnelli, Maurizio Iengo, Rosario Cuomo, Francesco Di Salle, Fabrizio Esposito
BACKGROUND: Right insular cortex is involved in taste discrimination, but its functional organization is still poorly known. In general, sensory cortices represent the spatial prevalence of relevant features for each sensory modality (visual, auditory, somatosensory) in an ordered way across the cortical space. Following this analogy, we hypothesized that primary taste cortex is organized in similar ordered way in response to six tastes with known receptorial mechanisms (sweet, bitter, sour, salt, umami, CO2)...
2017: PloS One
https://www.readbyqxmd.com/read/29276056/calcium-taste-avoidance-in-drosophila
#12
Youngseok Lee, Seeta Poudel, Yunjung Kim, Dhananjay Thakur, Craig Montell
Many animals, ranging from vinegar flies to humans, discriminate a wide range of tastants, including sugars, bitter compounds, NaCl, and sour. However, the taste of Ca2+ is poorly understood, and it is unclear whether animals such as Drosophila melanogaster are endowed with this sense. Here, we examined Ca2+ taste in Drosophila and showed that high levels of Ca2+ are aversive. The repulsion was mediated by two mechanisms-activation of a specific class of gustatory receptor neurons (GRNs), which suppresses feeding and inhibition of sugar-activated GRNs, which normally stimulates feeding...
December 20, 2017: Neuron
https://www.readbyqxmd.com/read/29243121/neural-processing-of-food-and-monetary-rewards-is-modulated-by-metabolic-state
#13
Mushfa Yousuf, Marcus Heldmann, Martin Göttlich, Thomas F Münte, Nuria Doñamayor
In humans, food is considered a powerful primary reinforcer, whereas money is a secondary reinforcer, as it gains a value through learning experience. Here, we aimed to identify the neural regions supporting the processing of food-related reinforcers, relate it to the neural underpinnings of monetary reinforcers, and explore their modulation by metabolic state (hunger vs satiety). Twenty healthy male participants were tested in two experimental sessions, once hungry and once satiated, using functional magnetic resonance imaging...
December 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29240979/brief-exposures-to-the-taste-of-ethanol-and-quinine-promote-subsequent-acceptance-of-ethanol-in-a-paradigm-that-minimizes-post-ingestive-consequences
#14
Gregory C Loney, Paul J Meyer
BACKGROUND: Aversion to the orosensory properties of concentrated ethanol solutions is often cited as a primary barrier to initiation of drinking and may contribute to abstention. These aversive properties include gustatory processes which encompass both bitter-like taste qualities and trigeminal-mediated irritation. Chronic-intermittent ethanol access (CIA) results in substantial and persistent increases in ethanol consumption, but the degree to which this facilitation involves sensory responding to ethanol and other bitter stimuli is currently undetermined...
December 14, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29240785/deet-as-a-feeding-deterrent
#15
WeiYu Lu, Justin K Hwang, Fangfang Zeng, Walter S Leal
The insect repellent N,N-diethyl-3-methylbenzamide (DEET), is a multimodal compound that acts as a spatial repellent as well as an irritant (contact repellent), thus being perceived by the insect's olfactory and gustatory systems as an odorant and a tastant, respectively. Soon after DEET was developed, almost 6 decades ago, it was reported that it reduced mosquito feeding on blood mixed with this repellent. It is now known that the mosquito proboscis senses contact repellents with the tips (labella) of the labium, which remain in direct contact with the outer layers of the skin, while the stylets, including the feeding deterrent sensor (labrum), penetrate the skin...
2017: PloS One
https://www.readbyqxmd.com/read/29232497/evaluation-of-olfaction-and-taste-function-in-type-2-diabetic-patients-with-and-without-peripheral-neuropathy
#16
Semih Yazla, Süay Özmen, Sinem Kıyıcı, Demet Yıldız, Mehmet Haksever, Sündüz Gencay
AIMS: Olfaction and gustation in patients with diabetes mellitus (DM) have great significance on quality of life and their impairment may result in possible hazards. A limited number of studies have been performed to determine the alteration of both gustatory and olfactory function in type 2 diabetic patients with diabetic peripheral neuropathy (DPN). The aim of this study was to determine whether type 2 diabetic patients, with and without DPN, exhibit major olfactory and gustatory dysfunction using validated and dependable techniques...
December 12, 2017: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/29231818/molecular-basis-of-fatty-acid-taste-in-drosophila
#17
Ji-Eun Ahn, Yan Chen, Hubert O Amrein
Behavioral studies have established that Drosophila appetitive taste responses to towards fatty acids are mediated by sweet sensing Gustatory Receptor Neurons (GRNs). Here we show that sweet GRN activation requires the function of the IonotropicReceptor genes IR25a, IR76b and IR56d. The former two IR genes are expressed in several neurons per sensilla, while IR56d expression is restricted to sweet GRNs. Importantly, loss of appetitive behavioral responses to fatty acids in IR25a and IR76b mutant flies can be completely rescued by expression of respective transgenes in sweet GRNs...
December 12, 2017: ELife
https://www.readbyqxmd.com/read/29218733/a-gene-driven-recovery-mechanism-drosophila-larvae-increase-feeding-activity-for-post-stress-weight-recovery
#18
Masasuke Ryuda, Miku Tabuchi, Hitoshi Matsumoto, Takashi Matsumura, Masanori Ochiai, Yoichi Hayakawa
Recovery from weight loss after stress is important for all organisms, although the recovery mechanisms are not fully understood. We are working to clarify these mechanisms. Here, we recorded enhanced feeding activity of Drosophila melanogaster larvae from 2 to 4 h after heat stress at 35°C for 1 h. During the post-stress period, expression levels of sweet taste gustatory receptor genes (Grs), Gr5a, Gr43a, Gr64a, and Gr64f, were elevated, whereas bitter taste Grs, Gr66a, and Gr33a, were decreased in expression and expression of a non-typical taste receptor Gr, Gr68a, was unchanged...
December 8, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29216270/generation-and-characterization-of-kctd15-mutations-in-zebrafish
#19
Alison Heffer, Gregory D Marquart, Allisan Aquilina-Beck, Nabil Saleem, Harold A Burgess, Igor B Dawid
Potassium channel tetramerization domain containing 15 (Kctd15) was previously found to have a role in early neural crest (NC) patterning, specifically delimiting the region where NC markers are expressed via repression of transcription factor AP-2a and inhibition of Wnt signaling. We used transcription activator-like effector nucleases (TALENs) to generate null mutations in zebrafish kctd15a and kctd15b paralogs to study the in vivo role of Kctd15. We found that while deletions producing frame-shift mutations in each paralog showed no apparent phenotype, kctd15a/b double mutant zebrafish are smaller in size and show several phenotypes including some affecting the NC, such as expansion of the early NC domain, increased pigmentation, and craniofacial defects...
2017: PloS One
https://www.readbyqxmd.com/read/29209962/effects-of-location-and-extent-of-spine-clustering-on-synaptic-integration-in-striatal-medium-spiny-neurons-a-computational-study
#20
Mrunal Rane, Rohit Manchanda
The nucleus accumbens (NAc) is known widely for its role in the reward circuit, which is dysregulated in a number of psychological disorders. Recent evidence also suggests the contribution of this structure in spatial and gustatory memories. Because of its role in different types of memories, similar to the hippocampus, we assumed the formation of spine clusters, which are engrams of memory, to be present on dendrites of medium spiny neurons (MSNs). We found that the activation of clustered inputs resulted in sublinear summation when clusters were present on the same branch and also when inputs were distributed on different branches...
December 6, 2017: Medical & Biological Engineering & Computing
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