keyword
MENU ▼
Read by QxMD icon Read
search

Bitter taste receptors

keyword
https://www.readbyqxmd.com/read/29323774/obesity-impairs-oligopeptide-amino-acid-induced-ghrelin-release-and-smooth-muscle-contractions-in-the-human-proximal-stomach
#1
L Vancleef, T Thijs, F Baert, L J Ceulemans, E Canovai, Q Wang, S Steensels, A Segers, R Farré, J Pirenne, M Lannoo, J Tack, I Depoortere
SCOPE: The satiation properties of proteins involve effects on gut peptide release and gastrointestinal motility which may be altered during obesity. This study compared the in vitro response and role of amino acid (AA) taste receptors (TASR) in the effect of AAs and a casein hydrolysate on ghrelin release and smooth muscle (SM) contractions in the proximal gut of lean and obese patients. METHODS AND RESULTS: Basal ghrelin release, measured from mucosal segments, was maximal in the fundus and decreased distally...
January 11, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29320397/in-silico-analysis-of-the-association-relationship-between-neuroprotection-and-flavors-of-traditional-chinese-medicine-based-on-the-mglurs
#2
Xu Zhang, Liansheng Qiao, Yankun Chen, Bowen Zhao, Yu Gu, Xiaoqian Huo, Yanling Zhang, Gongyu Li
The metabotropic glutamate receptors (mGluRs) are known as both synaptic receptors and taste receptors. This feature is highly similar to the Property and Flavor theory of Traditional Chinese medicine (TCM), which has the pharmacological effect and flavor. In this study, six ligand based pharmacophore (LBP) models, seven homology modeling models, and fourteen molecular docking models of mGluRs were built based on orthosteric and allosteric sites to screening potential compounds from Traditional Chinese Medicine Database (TCMD)...
January 10, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29311514/the-utility-of-the-artificial-taste-sensor-in-evaluating-the-bitterness-of-drugs-correlation-with-responses-of-human-taste2-receptors-htas2rs
#3
Tamami Haraguchi, Takahiro Uchida, Miyako Yoshida, Honami Kojima, Masaaki Habara, Hidekazu Ikezaki
The purpose of this study was to examine the ability of the artificial taste sensor to evaluate the bitterness of drugs by comparing the responses of the taste sensor with documented responses of human TASTE2 receptors (hTAS2Rs). For this purpose 22 bitter compounds, used as ingredients of pharmaceutical medicines in Japan and known ligands of hTAS2Rs, were selected for testing. Their solutions (0.01, 0.03, 0.1 mM) were evaluated by five different taste sensors (AC0, AN0, BT0, C00, AE1). Correlations between physicochemical parameters of the compounds and the responses of the taste sensors and hTAS2Rs were evaluated...
2018: Chemical & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29311301/trpm4-and-trpm5-are-both-required-for-normal-signaling-in-taste-receptor-cells
#4
Debarghya Dutta Banik, Laura E Martin, Marc Freichel, Ann-Marie Torregrossa, Kathryn F Medler
Peripheral taste receptor cells use multiple signaling pathways to transduce taste stimuli into output signals that are sent to the brain. Transient receptor potential melastatin 5 (TRPM5), a sodium-selective TRP channel, functions as a common downstream component in sweet, bitter, and umami signaling pathways. In the absence of TRPM5, mice have a reduced, but not abolished, ability to detect stimuli, suggesting that a TRPM5-independent pathway also contributes to these signals. Here, we identify a critical role for the sodium-selective TRP channel TRPM4 in taste transduction...
January 8, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29282878/is-food-refusal-in-autistic-children-related-to-tas2r38-genotype
#5
Maria Pia Riccio, Chiara Franco, Rossella Negri, Roberta Ida Ferrentino, Roberta Maresca, Elisa D'alterio, Luigi Greco, Carmela Bravaccio
Several studies suggest that atypical eating behaviors, in particular food selectivity, are more frequent in children with autism spectrum disorder (ASD). A link between bitter taste perception, namely PROP/PTC sensitivity and food preferences is known in healthy children. The aim of this study is to investigate whether genetic variants of the TAS2R38 taste receptor responsible for different bitter sensitivity could affect foods preferences and consequently food refusal in ASD children. We recruited 43 children with ASD and 41 with normotypic development (TD) with or without food selectivity, aged between 2 and 11 years...
December 28, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/29278699/perinatal-development-of-bitter-taste-avoidance-behavior-in-mice-is-associated-with-actin-dependent-localization-of-bitter-taste-receptors-to-the-microvilli-of-taste-cells
#6
Atsuko Yamashita, Kaori Kondo, Yoshimi Kunishima, Sachiko Iseki, Takashi Kondo, Masato S Ota
Bitter taste avoidance behavior (BAB) plays a fundamental role in the avoidance of toxic substances with a bitter taste. However, the molecular basis underlying the development of BAB is unknown. To study critical developmental events by which taste buds turn into functional organs with BAB, we investigated the early phase development of BAB in postnatal mice in response to bitter-tasting compounds, such as quinine and thiamine. Postnatal mice started to exhibit BAB for thiamine and quinine at postnatal day 5 (PD5) and PD7, respectively...
December 23, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29276056/calcium-taste-avoidance-in-drosophila
#7
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/29234667/a-matter-of-taste-lineage-specific-loss-of-function-of-taste-receptor-genes-in-vertebrates
#8
REVIEW
Marco Antinucci, Davide Risso
Vertebrates can perceive at least five different taste qualities, each of which is thought to have a specific role in the evolution of different species. The avoidance of potentially poisonous foods, which are generally bitter or sour tasting, and the search for more nutritious ones, those with high-fat and high-sugar content, are two of the most well-known examples. The study of taste genes encoding receptors that recognize ligands triggering taste sensations has helped to reconstruct several evolutionary adaptations to dietary changes...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/29231818/molecular-basis-of-fatty-acid-taste-in-drosophila
#9
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/29222887/relationship-between-umami-taste-acuity-with-sweet-or-bitter-taste-acuity-and-food-selection-in-japanese-women-university-students
#10
Masaru Kubota, Chikako Toda, Ayako Nagai-Moriyama
BACKGROUND AND OBJECTIVES: Although there are many studies on the umami receptor and its signaling pathway, literature on the effect of umami taste acuity on dietary choices in healthy subjects is limited. The current study aims to clarify the relationship between umami taste acuity with sweet or bitter taste acuity, food preference and intake. METHODS AND STUDY DESIGN: Forty-two healthy Japanese female university students were enrolled. The acuity for umami, sweet, and bitter tastes was evaluated using the filter-paper disc method...
2018: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29218733/a-gene-driven-recovery-mechanism-drosophila-larvae-increase-feeding-activity-for-post-stress-weight-recovery
#11
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/29216297/skn-1a-pou2f3-functions-as-a-master-regulator-to-generate-trpm5-expressing-chemosensory-cells-in-mice
#12
Junpei Yamashita, Makoto Ohmoto, Tatsuya Yamaguchi, Ichiro Matsumoto, Junji Hirota
Transient receptor potential channel M5 (Trpm5)-expressing cells, such as sweet, umami, and bitter taste cells in the oropharyngeal epithelium, solitary chemosensory cells in the nasal respiratory epithelium, and tuft cells in the small intestine, that express taste-related genes function as chemosensory cells. Previous studies demonstrated that Skn-1a/Pou2f3, a POU homeodomain transcription factor is expressed in these Trpm5-expressing chemosensory cells, and is necessary for their generation. Trpm5-expressing cells have recently been found in trachea, auditory tube, urethra, thymus, pancreatic duct, stomach, and large intestine...
2017: PloS One
https://www.readbyqxmd.com/read/29188655/-taste-signal-transduction-and-the-role-of-taste-receptors-in-the-regulation-of-microbial-infection
#13
Lu Yangyu, Xi Ranhui, Zheng Xin, He Jinzhi, Xu Xin
Taste receptors guide individuals to consume nutrients while avoiding potentially noxious substances. Interestingly, recent studies have shown that taste receptors are also expressed beyond the taste buds, including brain, respiratory system, and digestive system, etc. These extragustatory taste receptors play important roles in microbial infection, nutrient uptake and host homeostasis. Mang extragustatory taste receptors have been proposed to sense microorganisms and regulate host innate defense. More importantly, polymorphisms of genes encoding taste receptor, particularly bitter taste receptor, are linked to different innate defensive responses...
October 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29178505/expression-levels-of-taste-related-genes-in-palate-and-tongue-tip-and-involvement-of-transient-receptor-potential-subfamily-m-member-5-trpm5-in-taste-sense-in-chickens
#14
Yuta Yoshida, Fuminori Kawabata, Yuko Kawabata, Shotaro Nishimura, Shoji Tabata
The elucidation of the mechanisms underlying the taste sense of chickens will contribute to improvements in poultry feeding, because the molecular mechanism of chickens' taste sense defines the feeding behavior of chickens. Here we focused on the gene expressions in two different oral tissues of chickens - the palate, which contains many taste buds, and the tongue tip, which contains few taste buds. Using the quantitative real-time polymerase chain reaction method, we found that the molecular markers for taste buds of chickens, that is α-gustducin and vimentin, were expressed significantly highly in the palate compared to the tongue tip...
November 27, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/29168616/lineage-specific-evolution-of-bitter-taste-receptor-genes-in-the-giant-and-red-pandas-implies-dietary-adaptation
#15
Lei Shan, Qi Wu, Le Wang, Lei Zhang, Fuwen Wei
Bitter taste receptor genes (TAS2Rs) mediate bitterness perception in mammals. It is believed that these genes evolved in response to species-specific diets. The giant panda (Ailuropoda melanoleuca) and red panda (Ailurus fulgens styani) in the order Carnivora are specialized herbivores with an almost exclusive bamboo diet (>90% bamboo). Because bamboo is full of bitter tasting compounds, we hypothesized that adaptive evolution have occurred at TAS2R genes in giant and red pandas throughout the course of their dietary shift...
November 23, 2017: Integrative Zoology
https://www.readbyqxmd.com/read/29163209/the-role-of-cholecystokinin-in-peripheral-taste-signaling-in-mice
#16
Ryusuke Yoshida, Misa Shin, Keiko Yasumatsu, Shingo Takai, Mayuko Inoue, Noriatsu Shigemura, Soichi Takiguchi, Seiji Nakamura, Yuzo Ninomiya
Cholecystokinin (CCK) is a gut hormone released from enteroendocrine cells. CCK functions as an anorexigenic factor by acting on CCK receptors expressed on the vagal afferent nerve and hypothalamus with a synergistic interaction between leptin. In the gut, tastants such as amino acids and bitter compounds stimulate CCK release from enteroendocrine cells via activation of taste transduction pathways. CCK is also expressed in taste buds, suggesting potential roles of CCK in taste signaling in the peripheral taste organ...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29163195/members-of-bitter-taste-receptor-cluster-tas2r143-tas2r135-tas2r126-are-expressed-in-the-epithelium-of-murine-airways-and-other-non-gustatory-tissues
#17
Shuya Liu, Shun Lu, Rui Xu, Ann Atzberger, Stefan Günther, Nina Wettschureck, Stefan Offermanns
The mouse bitter taste receptors Tas2r143, Tas2r135, and Tas2r126 are encoded by genes that cluster on chromosome 6 and have been suggested to be expressed under common regulatory elements. Previous studies indicated that the Tas2r143/Tas2r135/Tas2r126 cluster is expressed in the heart, but other organs had not been systematically analyzed. In order to investigate the expression of this bitter taste receptor gene cluster in non-gustatory tissues, we generated a BAC (bacterial artificial chromosome) based transgenic mouse line, expressing CreERT2 under the control of the Tas2r143 promoter...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29133786/heterogeneity-in-the-drosophila-gustatory-receptor-complexes-that-detect-aversive-compounds
#18
Ha Yeon Sung, Yong Taek Jeong, Ji Yeon Lim, Hyeyon Kim, Soo Min Oh, Sun Wook Hwang, Jae Young Kwon, Seok Jun Moon
Animals must detect aversive compounds to survive. Bitter taste neurons express heterogeneous combinations of bitter receptors that diversify their response profiles, but this remains poorly understood. Here we describe groups of taste neurons in Drosophila that detect the same bitter compounds using unique combinations of gustatory receptors (GRs). These distinct complexes also confer responsiveness to non-overlapping sets of additional compounds. While either GR32a/GR59c/GR66a or GR22e/GR32a/GR66a heteromultimers are sufficient for lobeline, berberine, and denatonium detection, only GR22e/GR32a/GR66a responds to strychnine...
November 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29130618/the-taste-of-toxicity-a-quantitative-analysis-of-bitter-and-toxic-molecules
#19
Ido Nissim, Ayana Dagan-Wiener, Masha Y Niv
The role of bitter taste-one of the few basic taste modalities-is commonly assumed to signal toxicity and alert animals against consuming harmful compounds. However, it is known that some toxic compounds are not bitter and that many bitter compounds have negligible toxicity while having important health benefits. Here we apply a quantitative analysis of the chemical space to shed light on the bitterness-toxicity relationship. Using the BitterDB dataset of bitter molecules, The BitterPredict prediction tool, and datasets of toxic compounds, we quantify the identity and similarity between bitter and toxic compounds...
November 11, 2017: IUBMB Life
https://www.readbyqxmd.com/read/29113930/bitter-taste-responses-of-gustducin-positive-taste-cells-in-mouse-fungiform-and-circumvallate-papillae
#20
Ryusuke Yoshida, Shingo Takai, Keisuke Sanematsu, Robert F Margolskee, Noriatsu Shigemura, Yuzo Ninomiya
Bitter taste serves as an important signal for potentially poisonous compounds in foods to avoid their ingestion. Thousands of compounds are estimated to taste bitter and presumed to activate taste receptor cells expressing bitter taste receptors (Tas2rs) and coupled transduction components including gustducin, phospholipase Cβ2 (PLCβ2) and transient receptor potential channel M5 (TRPM5). Indeed, some gustducin-positive taste cells have been shown to respond to bitter compounds. However, there has been no systematic characterization of their response properties to multiple bitter compounds and the role of transduction molecules in these cells...
November 4, 2017: Neuroscience
keyword
keyword
51258
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"