keyword
MENU ▼
Read by QxMD icon Read
search

chloride channel activators

keyword
https://www.readbyqxmd.com/read/28739571/splice-variants-of-ph-sensitive-chloride-channel-identify-a-key-determinant-of-ivermectin-sensitivity-in-the-larvae-of-the-silkworm-bombyx-mori
#1
Daiki Okuhara, Shogo Furutani, Katsuhiko Ito, Makoto Ihara Ihara, Kazuhiko Matsuda
The pH-sensitive chloride channels (pHCls) are broadly expressed in insects, but little is known about their physiological role, diversity and sensitivity to insecticides acting on relevant chloride channels. Here we have sequenced 50 transcripts of the pHCl-1 gene from the brain, third thoracic ganglion (T3G) and midgut of larvae of silkworm Bombyx mori. It was found that >50 variants were expressed with distinct splicing in the T3G compared to the brain and midgut. Of the variants detected, variant 9, which was expressed most abundantly in the larvae, was reconstituted in Xenopus laevis oocytes to characterise its pH- and ivermectin sensitivity...
July 24, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28736919/a-g326e-substitution-in-the-glutamate-gated-chloride-channel-3-glucl3-of-the-two-spotted-spider-mite-tetranychus-urticae-abolishes-the-agonistic-activity-of-macrocyclic-lactones
#2
Catherine Mermans, Wannes Dermauw, Sven Geibel, Thomas Van Leeuwen
BACKGROUND: The macrocyclic lactones abamectin and milbemectin are frequently used to control phytophagous mites such as Tetranychus urticae. Consequently, resistance has developed and was genetically linked with substitutions in the glutamate-gated chloride channel (GluCl) subunits TuGluCl1 and TuGluCl3. Here, we functionally validated a G326E substitution in TuGluCl3 by functional expression in Xenopus laevis oocytes followed by two-electrode voltage-clamp electrophysiology. RESULTS: Homomeric wild-type and mutated GluCl3 were successfully expressed...
July 24, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28736364/-angiotensin-1-7-protects-cardiac-myocytes-against-high-glucose-induced-injury-by-inhibiting-clc-3-chloride-channels
#3
Shao-Ai Ccai, Jing-Fu Chen, Mei-Ji Chen, Jian-Cong Lin, Jian-Qiang Feng, Kai Lin, Xi-Mei Zhi, Wei-Jie Zhang, Wen Wu
OBJECTIVE: To explore whether angiotensin-(1-7) [Ang-(1-7)] protects cardiac myocytes against high glucose (HG)-induced injury by inhibiting ClC-3 chloride channels. METHOD: H9c2 cardiac cells were exposed to 35 mmol/L glucose for 24 h to establish a cell injury model. The cells were treated with Ang-(1-7) or the inhibitor of chloride channel (NPPB) in the presence of HG for 24 h to observe the changes in HG-induced cell injury. Cell counter kit 8 (CCK-8) assay was used to test the cell viability, and the morphological changes of the apoptotic cells were detected using Hoechst 33258 staining and fluorescent microscopy...
July 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28727479/extracellular-chloride-is-required-for-efficient-platelet-aggregation
#4
Kirk A Taylor, Darren G S Wilson, Matthew T Harper, Nicholas Pugh
Anion channels perform a diverse range of functions and have been implicated in ATP release, volume regulation, and phosphatidylserine exposure. Platelets have been shown to express several anion channels but their function is incompletely understood. Due to a paucity of specific pharmacological blockers, we investigated the effect of extracellular chloride substitution on platelet activation using aggregometry and flow cytometry. In the absence of extracellular chloride, we observed a modest reduction of the maximum aggregation response to thrombin or collagen-related peptide...
July 20, 2017: Platelets
https://www.readbyqxmd.com/read/28723651/suppression-of-clc-3-chloride-channel-reduces-the-aggressiveness-of-glioma-through-inhibiting-nuclear-factor-%C3%AE%C2%BAb-pathway
#5
Bing Wang, Jing Xie, Hai-Yong He, En-Wen Huang, Qing-Hua Cao, Lun Luo, Yong-Shi Liao, Ying Guo
CLC-3 chloride channel plays important roles on cell volume regulation, proliferation and migration in normal and cancer cells. Recent growing evidence supports a critical role of CLC-3 in glioma metastasis, however, the mechanism underlying is unclear. This study finds that CLC-3 is upregulated in glioma tissues and positively correlated with WHO histological grade. Patients with high CLC-3 expression had an overall shorter survival time, whereas patients with low expression of CLC-3 had a better survival time...
July 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28722226/biology-of-slac1-type-anion-channels-from-nutrient-uptake-to-stomatal-closure
#6
REVIEW
Rainer Hedrich, Dietmar Geiger
Contents 1 I. 1 II. 2 III. 5 IV. 8 V. 11 VI. 12 13 13 References 13 SUMMARY: Stomatal guard cells control leaf CO2 intake and concomitant water loss to the atmosphere. When photosynthetic CO2 assimilation is limited and the ratio of CO2 intake to transpiration becomes suboptimal, guard cells, sensing the rise in CO2 concentration in the substomatal cavity, deflate and the stomata close. Screens for mutants that do not close in response to experimentally imposed high CO2 atmospheres identified the guard cell-expressed Slowly activating anion channel, SLAC1, as the key player in the regulation of stomatal closure...
July 19, 2017: New Phytologist
https://www.readbyqxmd.com/read/28713271/luminally-acting-agents-for-constipation-treatment-a-review-based-on-literatures-and-patents
#7
REVIEW
Hong Yang, Tonghui Ma
Constipation is one of the most frequently reported gastrointestinal (GI) disorders that negatively impacts quality of life and is associated with a significant economic burden to the patients and society. Traditional treatments including lifestyle modification and laxatives are often ineffective in the more severe forms of constipation and over the long term. New medications targeting at intestinal chloride channels and colonic serotonin receptors have been demonstrated effective in recent years. Emerging agents focusing on improving intestinal secretion and/or colonic motility have been shown effective in animal models and even in clinical trials...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28706458/electrophysiological-characteristics-of-r47w-and-a298t-mutations-in-clc-1-of-myotonia-congenita-patients-and-evaluation-of-clinical-features
#8
Hyung Jin Chin, Chan Hyeong Kim, Kotdaji Ha, Jin Hong Shin, Dae-Seong Kim, Insuk So
Myotonia congenita (MC) is a genetic disease that displays impaired relaxation of skeletal muscle and muscle hypertrophy. This disease is mainly caused by mutations of CLCN1 that encodes human skeletal muscle chloride channel (CLC-1). CLC-1 is a voltage gated chloride channel that activates upon depolarizing potentials and play a major role in stabilization of resting membrane potentials in skeletal muscle. In this study, we report 4 unrelated Korean patients diagnosed with myotonia congenita and their clinical features...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28680296/distribution-and-function-of-the-bestrophin-1-best1-channel-in-the-brain
#9
REVIEW
Soo-Jin Oh, C Justin Lee
Bestrophin-1 (Best1) is a calcium-activated anion channel identified from retinal pigment epithelium where human mutations are associated with Best's macular degeneration. Best1 is known to be expressed in a variety of tissues including the brain, and is thought to be involved in many physiological processes. This review focuses on the current state of knowledge on aspects of expression and function of Best1 in the brain. Best1 protein is observed in cortical and hippocampal astrocytes, in cerebellar Bergmann glia and lamellar astrocytes, in thalamic reticular neurons, in meninges and in the epithelial cells of the choroid plexus...
June 2017: Experimental Neurobiology
https://www.readbyqxmd.com/read/28670699/the-desert-plant-phoenix-dactylifera-closes-stomata-via-nitrate-regulated-slac1-anion-channel
#10
Heike M Müller, Nadine Schäfer, Hubert Bauer, Dietmar Geiger, Silke Lautner, Jörg Fromm, Markus Riederer, Amauri Bueno, Thomas Nussbaumer, Klaus Mayer, Saleh A Alquraishi, Ahmed H Alfarhan, Erwin Neher, Khaled A S Al-Rasheid, Peter Ache, Rainer Hedrich
Date palm Phoenix dactylifera is a desert crop well adapted to survive and produce fruits under extreme drought and heat. How are palms under such harsh environmental conditions able to limit transpirational water loss? Here, we analysed the cuticular waxes, stomata structure and function, and molecular biology of guard cells from P. dactylifera. To understand the stomatal response to the water stress phytohormone of the desert plant, we cloned the major elements necessary for guard cell fast abscisic acid (ABA) signalling and reconstituted this ABA signalosome in Xenopus oocytes...
July 3, 2017: New Phytologist
https://www.readbyqxmd.com/read/28670393/chronic-intermittent-hypoxia-decreases-pulmonary-clearance-of-99m-tc-labelled-particulate-matter-in-mice
#11
Cuiping Fu, Huan Lu, Xu Wu, Jie Liu, Chengying Liu, Zilong Liu, Wei Yuan, Jian Zhou, Shanqun Li
BACKGROUND: Obstructive sleep apnea-hypopnea syndrome (OSAHS) could cause systematic inflammation including pulmonary inflammatory response, whereas the influence of OSAHS in pulmonary clearance ability remains unknown. The main pathophysiological feature of OSAHS is chronic intermittent hypoxia (CIH). The goal of this study is to clarify the airway clearance of particulate matter (PM) in CIH mice, and to explore the potential mechanism. METHODS: Balb/c mice were divided into a CIH group and a control group, exposed to intermittent hypoxia and air chamber, respectively...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28668375/transient-receptor-potential-melastatin-2-channels-trpm2-mediate-neonatal-hypoxic-ischemic-brain-injury-in-mice
#12
Sammen Huang, Ekaterina Turlova, Feiya Li, Mei-Hua Bao, Vivian Szeto, Raymond Wong, Ahmed Abussaud, Haitao Wang, Shuzhen Zhu, Xinzheng Gao, Yasuo Mori, Zhong-Ping Feng, Hong-Shuo Sun
Transient receptor potential melastatin 2 (TRPM2), a calcium-permeable non-selective cation channel, is reported to mediate brain damage following ischemic insults in adult mice. However, the role of TRPM2 channels in neonatal hypoxic-ischemic brain injury remains unknown. We hypothesize that TRPM2(+/-) and TRPM2(-/-) neonatal mice have reduced hypoxic-ischemic brain injury. To study the effect of TRPM2 on neonatal brain damage, we used 2,3,5-triphenyltetrazolium chloride (TTC) staining to assess the infarct volume and whole brain imaging to assess morphological changes in the brain...
June 29, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28666267/cell-specific-regulation-of-proliferation-by-ano1-tmem16a-in-breast-cancer-with-different-er-pr-and-her2-status
#13
Huizhe Wu, Hui Wang, Shu Guan, Jing Zhang, Qiuchen Chen, Xiaodong Wang, Ke Ma, Pengfei Zhao, Haishan Zhao, Weifan Yao, Feng Jin, Qinghuan Xiao, Minjie Wei
The calcium-activated chloride channel Ano1 (TMEM16A) is overexpressed in many tumors. However, conflicting data exist regarding the role of Ano1 in cell proliferation. Here, we performed immunohistochemistry to investigate the expression of Ano1 and Ki67 in 403 patients with breast cancer, and analyzed the association between the expression of Ano1 and Ki67 in breast cancer subtypes categorized according to estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2)...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28664138/naringenin-inhibits-pacemaking-activity-in-interstitial-cells-of-cajal-from-murine-small-intestine
#14
Hyun Jung Kim, Byung Joo Kim
BACKGROUND: Naringenin (NRG) is a common dietary polyphenolic constituent of fruits. NRG has diverse pharmacological activities, and is used in traditional medicine to treat various diseases including gastrointestinal (GI) disorders. Interstitial cells of Cajal (ICCs) are pacemaker cells of the GI tract. In this study, the authors investigated the effects of NRG on ICCs and on GI motility in vitro and in vivo. METHODS: ICCs were dissociated from mouse small intestines by enzymatic digestion...
June 2017: Integrative medicine research
https://www.readbyqxmd.com/read/28651800/cellular-mechanisms-underlying-the-inhibitory-effect-of-flufenamic-acid-on-chloride-secretion-in-human-intestinal-epithelial-cells
#15
Pawin Pongkorpsakol, Chantapol Yimnual, Varanuj Chatsudthipong, Vatcharin Rukachaisirikul, Chatchai Muanprasat
Intestinal Cl(-) secretion is involved in the pathogenesis of secretory diarrheas including cholera. We recently demonstrated that flufenamic acid (FFA) suppressed Vibriocholerae El Tor variant-induced intestinal fluid secretion via mechanisms involving AMPK activation and NF-κB-suppression. The present study aimed to investigate the effect of FFA on transepithelial Cl(-) secretion in human intestinal epithelial (T84) cells. FFA inhibited cAMP-dependent Cl(-) secretion in T84 cell monolayers with IC50 of ∼8 μM...
June 10, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28649232/ion-channels-of-pituitary-gonadotrophs-and-their-roles-in-signaling-and-secretion
#16
REVIEW
Stanko S Stojilkovic, Ivana Bjelobaba, Hana Zemkova
Gonadotrophs are basophilic cells of the anterior pituitary gland specialized to secrete gonadotropins in response to elevation in intracellular calcium concentration. These cells fire action potentials (APs) spontaneously, coupled with voltage-gated calcium influx of insufficient amplitude to trigger gonadotropin release. The spontaneous excitability of gonadotrophs reflects the expression of voltage-gated sodium, calcium, potassium, non-selective cation-conducting, and chloride channels at their plasma membrane (PM)...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28648509/pendred-syndrome
#17
REVIEW
Jean-Louis Wémeau, Peter Kopp
Pendred syndrome is an autosomal recessive disorder that is classically defined by the combination of sensorineural deafness/hearing impairment, goiter, and an abnormal organification of iodide with or without hypothyroidism. The hallmark of the syndrome is the impaired hearing, which is associated with inner ear malformations such as an enlarged vestibular aqueduct (EVA). The thyroid phenotype is variable and may be modified by the nutritional iodine intake. Pendred syndrome is caused by biallelic mutations in the SLC26A4/PDS gene, which encodes the multifunctional anion exchanger pendrin...
March 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28631282/biosynthesis-of-complex-indole-alkaloids-elucidation-of-the-concise-pathway-of-okaramines
#18
Chen-Yu Lai, I-Wen Lo, Ranuka T Hewage, Yi-Chen Chen, Chien-Ting Chen, Chi-Fang Lee, Steven Lin, Man-Cheng Tang, Hsiao-Ching Lin
The okaramines are a class of complex indole alkaloids isolated from Penicillium and Aspergillus species. Their potent insecticidal activity arises from selectively activating glutamate-gated chloride channels (GluCls) in invertebrates, not affecting human ligand-gated anion channels. Okaramines B (1) and D (2) contain a polycyclic skeleton, including an azocine ring and an unprecedented 2-dimethyl-3-methyl-azetidine ring. Owing to their complex scaffold, okaramines have inspired many total synthesis efforts, but the enzymology of the okaramine biosynthetic pathway remains unexplored...
June 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28620305/comparative-effects-of-chloride-channel-inhibitors-on-lrrc8-vrac-mediated-chloride-conductance
#19
Jonas Friard, Michel Tauc, Marc Cougnon, Vincent Compan, Christophe Duranton, Isabelle Rubera
Chloride channels play an essential role in a variety of physiological functions and in human diseases. Historically, the field of chloride channels has long been neglected owing to the lack of powerful selective pharmacological agents that are needed to overcome the technical challenge of characterizing the molecular identities of these channels. Recently, members of the LRRC8 family have been shown to be essential for generating the volume-regulated anion channel (VRAC) current, a chloride conductance that governs the regulatory volume decrease (RVD) process...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28611584/glial-and-neuronal-glutamate-transporters-differ-in-the-na-requirements-for-activation-of-the-substrate-independent-anion-conductance
#20
Christopher B Divito, Jenna E Borowski, Nathan G Glasgow, Aneysis D Gonzalez-Suarez, Delany Torres-Salazar, Jon W Johnson, Susan G Amara
Excitatory amino acid transporters (EAATs) are secondary active transporters of L-glutamate and L- or D-aspartate. These carriers also mediate a thermodynamically uncoupled anion conductance that is gated by Na(+) and substrate binding. The activation of the anion channel by binding of Na(+) alone, however, has only been demonstrated for mammalian EAAC1 (EAAT3) and EAAT4. To date, no difference has been observed for the substrate dependence of anion channel gating between the glial, EAAT1 and EAAT2, and the neuronal isoforms EAAT3, EAAT4 and EAAT5...
2017: Frontiers in Molecular Neuroscience
keyword
keyword
72220
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"