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Olfaction

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https://www.readbyqxmd.com/read/27905879/transcriptome-profiling-in-the-damselfly-ischnura-elegans-identifies-genes-with-sex-biased-expression
#1
Pallavi Chauhan, Maren Wellenreuther, Bengt Hansson
BACKGROUND: Sexual dimorphism occurs widely across the animal kingdom and has profound effects on evolutionary trajectories. Here, we investigate sex-specific gene expression in Ischnura elegans (Odonata: dragonflies and damselflies), a species with pronounced sexual differences including a female-limited colour polymorphism with two female-like gynochrome morphs and one male-mimicking, androchrome morph. Whole-organism transcriptome profiling and sex-biased gene expression analysis was conducted on adults of both sexes (pooling all females as well as separating the three morphs) to gain insights into genes and pathways potentially associated with sexual development and sexual conflict...
December 1, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27905542/defining-an-olfactory-receptor-function-in-airway-smooth-muscle-cells
#2
William H Aisenberg, Jessie Huang, Wanqu Zhu, Premraj Rajkumar, Randy Cruz, Lakshmi Santhanam, Niranjana Natarajan, Hwan Mee Yong, Breann De Santiago, Jung Jin Oh, A-Rum Yoon, Reynold A Panettieri, Oliver Homann, John K Sullivan, Stephen B Liggett, Jennifer L Pluznick, Steven S An
Pathways that control, or can be exploited to alter, the increase in airway smooth muscle (ASM) mass and cellular remodeling that occur in asthma are not well defined. Here we report the expression of odorant receptors (ORs) belonging to the superfamily of G-protein coupled receptors (GPCRs), as well as the canonical olfaction machinery (Golf and AC3) in the smooth muscle of human bronchi. In primary cultures of isolated human ASM, we identified mRNA expression for multiple ORs. Strikingly, OR51E2 was the most highly enriched OR transcript mapped to the human olfactome in lung-resident cells...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27896310/preservation-of-essential-odor-guided-behaviors-and-odor-based-reversal-learning-after-targeting-adult-brain-serotonin-synthesis
#3
Kaitlin S Carlson, Meredith S Whitney, Marie A Gadziola, Evan S Deneris, Daniel W Wesson
The neurotransmitter serotonin (5-HT) is considered a powerful modulator of sensory system organization and function in a wide range of animals. The olfactory system is innervated by midbrain 5-HT neurons into both its primary and secondary odor-processing stages. Facilitated by this circuitry, 5-HT and its receptors modulate olfactory system function, including odor information input to the olfactory bulb. It is unknown, however, whether the olfactory system requires 5-HT for even its most basic behavioral functions...
September 2016: ENeuro
https://www.readbyqxmd.com/read/27888645/olfaction-in-patients-with-allergic-rhinitis-an-indicator-of-successful-mp-azeflu-therapy
#4
Ludger Klimek, Sophia C Poletti, Annette Sperl, Magdalena Spielhaupter, Cornel Bardenhewer, Joaquim Mullol, Karl Hörmann, Thomas Hummel
BACKGROUND: The purpose of this study was to investigate the effect of MP-AzeFlu on olfaction and the interaction between severity of allergic rhinitis and olfactory improvement after therapy. METHODS: A prospective, multicenter, observational study was performed on 47 patients with persistent allergic rhinitis. Duration and severity of allergic rhinitis was diagnosed and classified using the modified Allergic Rhinitis and its Impact on Asthma (ARIA) criteria and the proof of allergen sensitization from positive skin-prick tests, specific immonoglobulin E (IgE) in serum, and nasal provocation response...
November 26, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27888336/ocean-acidification-alters-temperature-and-salinity-preferences-in-larval-fish
#5
Jennifer C A Pistevos, Ivan Nagelkerken, Tullio Rossi, Sean D Connell
Ocean acidification alters the way in which animals perceive and respond to their world by affecting a variety of senses such as audition, olfaction, vision and pH sensing. Marine species rely on other senses as well, but we know little of how these might be affected by ocean acidification. We tested whether ocean acidification can alter the preference for physicochemical cues used for dispersal between ocean and estuarine environments. We experimentally assessed the behavioural response of a larval fish (Lates calcarifer) to elevated temperature and reduced salinity, including estuarine water of multiple cues for detecting settlement habitat...
November 25, 2016: Oecologia
https://www.readbyqxmd.com/read/27886011/odor-identification-screening-improves-diagnostic-classification-in-incipient-alzheimer-s-disease
#6
Megan Quarmley, Paul J Moberg, Dawn Mechanic-Hamilton, Sushila Kabadi, Steven E Arnold, David A Wolk, David R Roalf
BACKGROUND: Measurements of olfaction may serve as useful biomarkers of incipient dementia. Here we examine the improvement in diagnostic accuracy of Alzheimer's disease (AD) and mild cognitive impairment (MCI) when assessing both cognitive functioning and odor identification. OBJECTIVE: To determine the utility of odor identification as a supplementary screening test in incipient AD. METHODS: Sniffin' Sticks Odor Identification Test (SS-OIT) and the Montreal Cognitive Assessment (MoCA) were administered in 262 AD, 174 MCI [150 amnestic (aMCI), and 24 non-amnestic (naMCI)], and 292 healthy older adults (HOA)...
November 18, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27884734/nitric-oxide-coupled-signaling-in-odor-elicited-molecular-events-in-the-olfactory-center-of-the-terrestrial-snail-helix-pomatia
#7
Zoltán Serfőző, Kálmán Nacsa, Zoltán Veréb, Izabella Battonyai, Csaba Hegedűs, Csilla Balogh, Károly Elekes
Olfaction, a chemosensory modality, plays a pivotal role in the orientation and behavior of invertebrates. The central olfactory processing unit in terrestrial stylomatophoran snails is the procerebrum, which contains NO synthesizing interneurons, whose oscillatory currents are believed to be the base of odor evoked memory formation. Nevertheless, in this model the up- and downstream events of molecular cascades that trigger and follow NO release, respectively, have not been studied. Immunocytochemistry and flow cytometry studies performed on procerebral neural perikarya isolated from the snail Helix pomatia revealed cell populations with discrete DAF-2 fluorescence, indicating the release of different amounts of NO...
November 21, 2016: Cellular Signalling
https://www.readbyqxmd.com/read/27875418/nonclassic-features-of-pseudohypoparathyroidism-type-1a
#8
Ashley H Shoemaker, Harald Jüppner
PURPOSE OF REVIEW: To provide readers with a review of contemporary literature describing the evolving understanding of the pseudohypoparathyroidism type 1A (PHP1A) phenotype. RECENT FINDINGS: The classic features of PHP1A include multihormone resistance and the Albright Hereditary Osteodystrophy phenotype (round facies, short stature, subcutaneous ossifications, brachydactyly, and early-onset obesity. Obesity may be because of a decrease in resting energy expenditure because most patients do not report significant hyperphagia...
November 21, 2016: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/27872308/atomistic-insight-into-lipid-translocation-by-a-tmem16-scramblase
#9
Neville P Bethel, Michael Grabe
The transmembrane protein 16 (TMEM16) family of membrane proteins includes both lipid scramblases and ion channels involved in olfaction, nociception, and blood coagulation. The crystal structure of the fungal Nectria haematococca TMEM16 (nhTMEM16) scramblase suggested a putative mechanism of lipid transport, whereby polar and charged lipid headgroups move through the low-dielectric environment of the membrane by traversing a hydrophilic groove on the membrane-spanning surface of the protein. Here, we use computational methods to explore the membrane-protein interactions involved in lipid scrambling...
November 21, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27868477/association-between-olfaction-and-higher-cortical-functions-in-alzheimer-s-disease-mild-cognitive-impairment-and-healthy-older-adults
#10
Amanda M Ward, Matthew Calamia, Erin Thiemann, Jamie Dunlap, Daniel Tranel
INTRODUCTION: Neural regions important for smell are proximal and closely connected to cortical areas that have been strongly implicated in higher order functions of value-based decision making and emotional memory. The integrity of these neural regions are affected in aging and neurodegenerative conditions. Two specific predictions follow from these neuroanatomical arrangements-namely, that olfaction would be associated with value-based decision making and with emotional memory. METHOD: To test these predictions, we measured these different capacities in participants with presumed varying degrees of integrity of the relevant brain structures: specifically, 13 patients with Alzheimer's disease, 8 patients with mild cognitive impairment, and 20 healthy older adults...
November 20, 2016: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/27865828/associations-between-former-exposure-to-manganese-and-olfaction-in-an-elderly-population-results-from-the-heinz-nixdorf-recall-study
#11
Swaantje Casjens, Beate Pesch, Sibylle Robens, Benjamin Kendzia, Thomas Behrens, Tobias Weiss, Nadin Ulrich, Marina Arendt, Lewin Eisele, Noreen Pundt, Anja Marr, Christoph van Thriel, Rainer Van Gelder, Michael Aschner, Susanne Moebus, Nico Dragano, Karl-Heinz Jöckel, Thomas Brüning
Occupational exposure to manganese (Mn) has been associated with impairments in olfaction and motor functions, but it has yet to be determined if such effects persist upon cessation of exposure. The objective of this study was to evaluate the influence of former occupational Mn exposure on olfaction within the framework of a prospective cohort study among an elderly German population. Information on job tasks with recognized Mn exposure and data on odor identification assessed with Sniffin' sticks was collected during the second follow-up of the Heinz Nixdorf Recall Study...
November 16, 2016: Neurotoxicology
https://www.readbyqxmd.com/read/27863163/surgical-therapy-vs-continued-medical-therapy-for-medically-refractory-chronic-rhinosinusitis-a-systematic-review-and-meta-analysis
#12
Zara M Patel, Andrew Thamboo, Luke Rudmik, Jayakar V Nayak, Timothy L Smith, Peter H Hwang
BACKGROUND: The currently accepted treatment paradigm of treating chronic rhinosinusitis (CRS) first with appropriate medical therapy (AMT) and then with surgery if patients are refractory to AMT, has been criticized for lack of evidence. The objective of this study was to reassess the literature and establish the highest level of evidence possible regarding further management of CRS patients refractory to AMT. METHODS: This study was a systematic review (SR) with meta-analysis (MA)...
November 11, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27860366/the-effect-of-intranasal-sodium-citrate-on-olfaction-in-post-infectious-loss-results-from-a-prospective-placebo-controlled-trial-in-49-patients
#13
K L Whitcroft, M Ezzat, M Cuevas, P Andrews, T Hummel
OBJECTIVES: Free calcium plays an integral role in peripheral olfactory processing, including feedback inhibition. It has therefore been suggested that reduction of intranasal free calcium with buffer solutions such as sodium citrate may improve olfactory function in patients with smell impairment. Several previous studies have supported this hypothesis, particularly in post-infectious olfactory loss. We therefore aimed to determine whether treatment with intranasal sodium citrate improves olfactory function in patients with post-infectious impairment...
November 10, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27859959/when-preschoolers-follow-their-eyes-and-older-children-follow-their-noses-visuo-olfactory-social-affective-matching-in%C3%A2-childhood
#14
Annachiara Cavazzana, Christiane Wesarg, Julia Parish-Morris, Johan N Lundström, Valentina Parma
Recognition of emotional facial expressions is a crucial skill for adaptive behavior that most often occurs in a multi-sensory context. Affective matching tasks have been used across development to investigate how people integrate facial information with other senses. Given the relative affective strength of olfaction and its relevance in mediating social information since birth, we assessed olfactory-visual matching abilities in a group of 140 children between the ages of 3 and 11 years old. We presented one of three odor primes (rose, fish and no-odor, rated as pleasant or unpleasant by individual children) before a facial choice task (happy vs...
November 17, 2016: Developmental Science
https://www.readbyqxmd.com/read/27853595/finding-flowers-in-the-dark-nectar-feeding-bats-integrate-olfaction-and-echolocation-while-foraging-for-nectar
#15
Tania P Gonzalez-Terrazas, Carlos Martel, Paulo Milet-Pinheiro, Manfred Ayasse, Elisabeth K V Kalko, Marco Tschapka
Nectar-feeding bats depend mainly on floral nectar to fulfil their energetic requirements. Chiropterophilous flowers generally present strong floral scents and provide conspicuous acoustic echoes to attract bats. While floral scents are assumed to attract bats over long distances, acoustic properties of flower structures may provide detailed information, thus supporting the localization of a flower at close ranges. So far, to our knowledge, there is no study trying to understand the relative importance as well as the combination of these generally coupled cues for detection (presence) and localization (exact position) of open flowers in nature...
August 2016: Royal Society Open Science
https://www.readbyqxmd.com/read/27852677/processing-of-intraoral-olfactory-and-gustatory-signals-in-the-gustatory-cortex-of-awake-rats
#16
Chad L Samuelsen, Alfredo Fontanini
: The integration of gustatory and olfactory information is essential to the perception of flavor. Human neuroimaging experiments have pointed to the gustatory cortex (GC) as one of the areas involved in mediating flavor perception. While GC's involvement in encoding the chemical identity and hedonic value of taste stimuli is well studied, it is unknown how single GC neurons process olfactory stimuli emanating from the mouth. In this study, we relied on multi-electrode recordings to investigate how single GC neurons respond to intraorally delivered tastants and tasteless odorants dissolved in water and whether/how these two modalities converge in the same neurons...
November 16, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27851741/the-odour-of-sex-sex-related-differences-in-volatile-compound-composition-among-barn-swallow-eggs-carrying-embryos-of-either-sex
#17
Alessandra Costanzo, Sara Panseri, Annamaria Giorgi, Andrea Romano, Manuela Caprioli, Nicola Saino
Avian communication has been traditionally believed to be mainly mediated by visual and auditory channels. However, an increasing number of studies are disclosing the role of olfaction in the interaction of birds with their social environment and with other species, as well as in other behaviors such as nest recognition, food location and navigation. Olfaction has also been suggested to play a role in parent-offspring communication not only in the post- but also in the pre-hatching period. Volatile compounds produced during embryogenesis and passively released through the eggshell pores may indeed represent the only cue at parents' disposal to assess offspring quality, including the sex composition of their clutch before hatching...
2016: PloS One
https://www.readbyqxmd.com/read/27849216/olfactory-function-and-quality-of-life-after-olfaction-rehabilitation-in-total-laryngectomees
#18
Christiane Gouvêa Dos Santos, Anke Bergmann, Kaliani Lima Coça, Angela Albuquerque Garcia, Tânia Cristina de Oliveira Valente
Purpose: To evaluate the effects of olfaction rehabilitation in the olfactory function and quality of life of total laryngectomized patients. Methods: Pre-post intervention clinical study conducted with total laryngectomees submitted to olfaction rehabilitation by means of the Nasal Airflow-Inducing Maneuver (NAIM) using the University of Pennsylvania Smell Identification Test (UPSIT), Olfactory Acuity Questionnaires, a Monitoring Questionnaire, and the University of Washington Quality of Life Questionnaire (UW-QOL)...
November 16, 2016: CoDAS
https://www.readbyqxmd.com/read/27849027/evolutionarily-conserved-odorant-receptor-function-questions-ecological-context-of-octenol-role-in-mosquitoes
#19
Amir Dekel, Ronald J Pitts, Esther Yakir, Jonathan D Bohbot
Olfaction is a key insect adaptation to a wide range of habitats. In the last thirty years, the detection of octenol by blood-feeding insects has been primarily understood in the context of animal host-seeking. The recent discovery of a conserved octenol receptor gene in the strictly nectar-feeding elephant mosquito Toxorhynchites amboinensis (TaOr8) suggests a different biological role. Here, we show that TaOR8 is a functional ortholog of its counterparts in blood-feeding mosquitoes displaying selectivity towards the (R)-enantiomer of octenol and susceptibility to the insect repellent DEET...
November 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27845440/odour-induced-analgesia-mediated-by-hypothalamic-orexin-neurons-in-mice
#20
Shogo Tashiro, Ran Yamaguchi, Sodemi Ishikawa, Takeshi Sakurai, Katsuko Kajiya, Yuichi Kanmura, Tomoyuki Kuwaki, Hideki Kashiwadani
Various folk remedies employ certain odorous compounds with analgesic effects. In fact, linalool, a monoterpene alcohol found in lavender extracts, has been found to attenuate pain responses via subcutaneous, intraperitoneal, intrathecal, and oral administration. However, the analgesic effects of odorous compounds mediated by olfaction have not been thoroughly examined. We performed behavioural pain tests under odourant vapour exposure in mice. Among six odourant molecules examined, linalool significantly increased the pain threshold and attenuated pain behaviours...
November 15, 2016: Scientific Reports
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