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Na k atpase

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https://www.readbyqxmd.com/read/28925723/expression-patterns-of-members-of-the-isocitrate-dehydrogenase-gene-family-in-murine-inner-ear
#1
Y-R Kim, K-H Kim, S Lee, S-K Oh, J-W Park, K-Y Lee, J-I Baek, U-K Kim
Age-related hearing loss (ARHL) is characterized by an age-dependent decline of auditory function characterized by with loss of sensory hair cells, spiral ganglion neurons, and stria vascularis (SV) cells in the cochlea of the inner ear. Aging and age-related diseases result from accumulated oxidative damage caused by reactive oxygen species (ROS) generated by mitochondria. The isocitrate dehydrogenase (IDH) family includes three enzymes in human cells: IDH1, IDH2, and IDH3. Although all three enzymes catalyze the same enzymatic reaction, that is, oxidative decarboxylation of isocitrate to produce α-ketoglutarate, each IDH enzyme has unique features...
September 19, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28919940/calcitox-aging-counterbalanced-by-endogenous-farnesol-like-sesquiterpenoids-an-undervalued-evolutionarily-ancient-key-signaling-pathway
#2
Arnold De Loof
Cells are powerful miniature electrophoresis chambers, at least during part of their life cycle. They die at the moment the voltage gradient over their plasma membrane, and their ability to drive a self-generated electric current carried by inorganic ions through themselves irreversibly collapses. Senescence is likely due to the progressive, multifactorial damage to the cell's electrical system. This is the essence of the "Fading electricity theory of aging" (De Loof et al., Aging Res. Rev. 2013;12:58-66)...
2017: Communicative & Integrative Biology
https://www.readbyqxmd.com/read/28917815/mitigation-of-nitrite-toxicity-by-increased-salinity-is-associated-with-multiple-physiological-responses-a-case-study-using-an-economically-important-model-species-the-juvenile-obscure-puffer-takifugu-obscurus
#3
Jun Wang, Hengxing Tang, Xingxing Zhang, Xiaofeng Xue, Xuexia Zhu, Yafen Chen, Zhou Yang
Nitrite is a common pollutant in water and is highly toxic to aquatic animals. To reveal the mechanism of salinity in attenuating nitrite toxicity to fish, we measured the physiological responses of juvenile Takifugu obscurus exposed to nitrite concentrations (0, 10, 20, 50, and 100 mg/L) under different salinity levels (0, 10, and 20 ppt) for 96 h. Salinity increased the survival rates of juvenile T. obscurus exposed to nitrite. Changes in key hematological parameters, antioxidant system, malondialdehyde, Na(+)/K(+)-ATPase, and HSP70 indicated that nitrite induced considerable damage to juveniles; salinity mitigated the harmful effects...
September 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28913664/supplementation-of-enzyme-treated-soy-protein-saves-dietary-protein-and-promotes-digestive-and-absorptive-ability-referring-to-tor-signaling-in-juvenile-fish
#4
Weiwei Xiao, Weidan Jiang, Lin Feng, Yang Liu, Pei Wu, Jun Jiang, Yongan Zhang, Xiaoqiu Zhou
This study was conducted to evaluate the effect of enzyme-treated soy protein (ETSP) supplementation in the low-protein diet on growth performance, digestive and absorptive capacities, and related signaling molecules' gene expressions in juvenile Jian carp. The results showed that percent weight gain (PWG), specific growth rate (SGR), and feed intake (FI) were decreased by reducing dietary protein from 34 to 32% (P < 0.05). Supplying low-protein diet with optimal ETSP increased previously mentioned indices of juvenile Jian carp (P < 0...
September 14, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28913548/changes-in-histopathology-enzyme-activities-and-the-expression-of-relevant-genes-in-zebrafish-danio-rerio-following-long-term-exposure-to-environmental-levels-of-thallium
#5
Li-Ping Hou, Yang Yang, Hu Shu, Guang-Guo Ying, Jian-Liang Zhao, Yi-Bing Chen, Yong-Heng Chen, Gui-Zhen Fang, Xin Li, Ji-Sheng Liu
Thallium is a rare-earth element, but widely distributed in water environments, posing a potential risk to our health. This study was designed to investigate the chronic effects of thallium based on physiological responses, gene expression, and changes in the activity of relevant enzymes in adult zebra fish exposed to thallium at low doses. The endpoints assessed include mRNA expression of metallothionein (MT)2 and heat shock protein HSP70; enzymatic activities of superoxide dismutase (SOD) and Na(+)/K(+)-ATPase; and the histopathology of gill, gonad, and liver tissues...
September 14, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28912873/phospholemman-a-major-regulator-of-skeletal-muscle-na-k-atpase-is-not-mutated-in-probands-with-hypokalemic-periodic-paralysis
#6
Ying-Ying Chen, Xiao-Ying Wang, Qiu-Xia Fu, Yi Kang, He-Bin Yao
The pathogenesis of hypokalemic periodic paralysis (HypoPP) remains unclear. Though some mutations in skeletal muscle ion channels were revealed previously, the exact mechanism remains to be fully elucidated. Increased Na(+)/K(+)-ATPase activity in skeletal muscle is postulated to contribute to attacks of HypoPP. Before the link between Na(+)/K(+)-ATPase dysfunction and these ion channel mutations is established, mutations in Na(+)/K(+)-ATPase and their regulators are the first to be excluded. Phospholemman, which is a protein encoded by the FXYD domain-containing ion transport regulator 1 (FXYD1) gene, is predominantly expressed in skeletal muscle and is the major regulator of Na(+)/K(+)-ATPase...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28912799/triportheus-albus-cope-1872-in-the-blackwater-clearwater-and-whitewater-of-the-amazon-a-case-of-phenotypic-plasticity
#7
José D A Araújo, Andrea Ghelfi, Adalberto L Val
The Amazon basin includes 1000s of bodies of water, that are sorted according to their color in three types: blackwater, clearwater, and whitewater, which significantly differ in terms of their physicochemical parameters. More than 3,000 species of fish live in the rivers of the Amazon, among them, the sardine, Triportheus albus, which is one of the few species that inhabit all three types of water. The purpose of our study was to analyze if the gene expression of T. albus is determined by the different types of water, that is, if the species presents phenotypic plasticity to live in blackwater, clearwater, and whitewater...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28912106/vascular-activation-of-k-channels-and-na-k-atpase-activity-of-estrogen-deficient-female-rats
#8
Rogério Faustino Ribeiro, Jonaina Fiorim, Vinicius Bermond Marques, Karoline de Sousa Ronconi, Tatiani Botelho, Marcella D Grando, Lusiane M Bendhack, Dalton Valentim Vassallo, Ivanita Stefanon
The goal of the present study was to evaluate vascular potassium channels and Na(+)-K(+)-ATPase activity in estrogen deficient female rats. Female rats that underwent ovariectomy were assigned to receive daily treatment with placebo (OVX) or estrogen replacement (OVX+E2, 1mg/kg, once a week, i.m.). Aortic rings were used to examine the involvement of K(+) channels and Na(+)-K(+)-ATPase in vascular reactivity. Acetylcholine (ACh)-induced relaxation was analyzed in the presence of L-NAME (100μM) and K(+) channels blockers: tetraethylammonium (TEA, 5mM), 4-aminopyridine (4-AP, 5mM), iberiotoxin (IbTX, 30nM), apamin (0...
September 11, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28911973/novel-oxolane-derivative-dmtd-mitigates-high-glucose-induced-erythrocytes-apoptosis-by-regulating-oxidative-stress
#9
Swamy Jagadish, Mahadevappa Hemshekhar, Somanathapura K NaveenKumar, Kothanahally S Sharath Kumar, Mahalingam S Sundaram, Basappa, Kesturu S Girish, Kanchugarakoppal S Rangappa
Chronic hyperglycemia is one of the characteristic conditions associated with Diabetes Mellitus (DM), which often exerts deleterious effects on erythrocyte morphology and hemodynamic properties leading to anemia and diabetes-associated vascular complications. High glucose-induced over production of reactive oxygen species (ROS) can alter the blood cell metabolism and biochemical functions subsequently causing eryptosis (red blood cell death), yet another complication of concern in DM. Therefore, blocking high glucose-induced oxidative damage and subsequent eryptosis is of high importance in the better management of DM and associated vascular complications...
September 11, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28911739/role-of-inward-rectifier-potassium-channels-in-salivary-gland-function-and-sugar-feeding-of-the-fruit-fly-drosophila-melanogaster
#10
Daniel R Swale, Zhilin Li, Felix Guerrero, Adalberto A Pérez De León, Lane D Foil
The arthropod salivary gland is of critical importance for horizontal transmission of pathogens, yet a detailed understanding of the ion conductance pathways responsible for saliva production and excretion is lacking. A superfamily of potassium ion channels, known as inward rectifying potassium (Kir) channels, is overexpressed in the Drosophila salivary gland by 32-fold when compared to the whole body mRNA transcripts. Therefore, we aimed to test the hypothesis that pharmacological and genetic depletion of salivary gland specific Kir channels alters the efficiency of the gland and reduced feeding capabilities using the fruit fly Drosophila melanogaster as a model organism that could predict similar effects in arthropod disease vectors...
September 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/28905315/preliminary-studies-of-acute-cadmium-administration-effects-on-the-calcium-activated-potassium-skca-and-bkca-channels-and-na-k-atpase-activity-in-isolated-aortic-rings-of-rats
#11
Dalton V Vassallo, Camila C P Almenara, Gilson Brás Broseghini-Filho, Ariane Calazans Teixeira, David Chaves F da Silva, Jhuli K Angeli, Alessandra S Padilha
Cadmium is an environmental pollutant closely linked with cardiovascular diseases that seems to involve endothelium dysfunction and reduced nitric oxide (NO) bioavailability. Knowing that NO causes dilatation through the activation of potassium channels and Na(+)/K(+)-ATPase, we aimed to determine whether acute cadmium administration (10 μM) alters the participation of K(+) channels, voltage-activated calcium channel, and Na(+)/K(+)-ATPase activity in vascular function of isolated aortic rings of rats. Cadmium did not modify the acetylcholine-induced relaxation...
September 13, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28905075/ouabain-attenuates-ovalbumin-induced-airway-inflammation
#12
José Guilherme F M Galvão, Luiz Henrique Agra Cavalcante-Silva, Deyse Cristina M Carvalho, Laércia Karla D P Ferreira, Talissa Mozzini Monteiro, Adriano Francisco Alves, Larissa Adilis M P Ferreira, Francisco Allysson A F Gadelha, Marcia Regina Piuvezam, Sandra Rodrigues-Mascarenhas
PURPOSE: Ouabain, an Na(+)/K(+)-ATPase inhibitor hormone, presents immunomodulatory actions, including anti-inflammatory effect on acute inflammation models. METHODS: In the present study, the effect of ouabain in a model of allergic airway inflammation induced by ovalbumin (OVA) was assessed. RESULTS: Initially, it was observed that ouabain treatment inhibited cellular migration induced by OVA on bronchoalveolar lavage fluid (BALF), mostly granulocytes, without modulating macrophage migration...
September 13, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/28904341/erratum-identification-of-na-k-atpase-inhibition-independent-proarrhythmic-ionic-mechanisms-of-cardiac-glycosides
#13
Cai Hong Koh, Jianjun Wu, Ying Ying Chung, Zhenfeng Liu, Rong-Rong Zhang, Ketpin Chong, Vladimir Korzh, Sherwin Ting, Steve Oh, Winston Shim, Hai-Yan Tian, Heming Wei
A correction to this article has been published and is linked from the HTML version of this paper. The error has been fixed in the paper.
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28900798/phenotypic-plasticity-in-gene-expression-and-physiological-response-in-red-drum-sciaenops-ocellatus-exposed-to-a-long-term-freshwater-environment
#14
Mariel Gullian Klanian, Omar Zapata Pérez, Miguel Angel Vela-Magaña
Red drum (Sciaenops ocellatus) is a euryhaline fish commonly found in the Gulf of Mexico and along the Atlantic coast of North America. Because of high commercial demand and its euryhaline characteristics, aquaculture of this species has diversified from marine to low-salinity aquaculture systems. In recent years, interest in the feasibility of producing red drum in inland freshwater systems has grown and this prompted us to investigate its osmoregulatory capacity after rearing for 8 months in a freshwater aquaculture system...
September 12, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28893470/elucidation-of-antimicrobial-activity-and-mechanism-of-action-by-n-substituted-carbazole-derivatives
#15
Johannes D Clausen, Lasse Kjellerup, Karen O'Hanlon Cohrt, John Bondo Hansen, William Dalby-Brown, Anne-Marie L Winther
Compounds belonging to a carbazole series have been identified as potent fungal plasma membrane proton adenosine triphophatase (H(+)-ATPase) inhibitors with a broad spectrum of antifungal activity. The carbazole compounds inhibit the adenosine triphosphate (ATP) hydrolysis activity of the essential fungal H(+)-ATPase, thereby functionally inhibiting the extrusion of protons and extracellular acidification, processes that are responsible for maintaining high plasma membrane potential. The compound class binds to and inhibits the H(+)-ATPase within minutes, leading to fungal death after 1-3h of compound exposure in vitro...
September 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28888452/inactivation-mechanism-of-vibrio-parahaemolyticus-via-supercritical-carbon-dioxide-treatment
#16
Feiyue Xu, Xiaomei Feng, Xiao Sui, Hong Lin, Yuqian Han
The effects of supercritical carbon dioxide (SC-CO2) treatments on Vibrio parahaemolyticus cells were determined using viable plate count method at different treatment times (10 and 40min), pressures (10-25MPa), and temperature (40°C). Using the changes in the physical (absorbance, transmission electron microscope and contents of fatty acids) and chemical indexes (pH value, activity of Na(+)K(+)-ATPase, SDS-PAGE) were for further understand the mechanisms of bacterial inactivation under SC-CO2. The result showed that 25MPa treatment for 40min in 40°C could significantly (P<0...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28887671/histamine-2-receptor-antagonism-elicits-protection-against-doxorubicin-induced-cardiotoxicity-in-rodent-model
#17
Sundar Kumar Kondru, Ajay Godwin Potnuri, Lingesh Allakonda, Prasad Konduri
Doxorubicin (DOX), an anthracycline-based antibiotic, is regularly used in the management of carcinomas, and haematological malignancies have been downplayed in chemotherapy because of its ability to induce dilated cardiomyopathy (DCM). Dexrazoxane is approved to combat the cardiotoxicity, but limited by its adverse effects. Redox imbalance and reactive oxygen species generation plays major role in DOX-induced cardiotoxicity. Histamine, known to mediate various cardiovascular effects, but nevertheless the role of histamine or its receptors in DOX-induced DCM is remained obscure...
September 8, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28886701/the-loss-of-function-disease-mutation-g301r-in-the-na-k-atpase-%C3%AE-2-isoform-decreases-lesion-volume-and-improves-functional-outcome-after-acute-spinal-cord-injury-in-mice
#18
Ditte Gry Ellman, Toke Jost Isaksen, Minna Christiansen Lund, Safinaz Dursun, Martin Wirenfeldt, Louise Helskov Jørgensen, Karin Lykke-Hartmann, Kate Lykke Lambertsen
BACKGROUND: The Na(+)/K(+)-ATPases are transmembrane ion pumps important for maintenance of ion gradients across the plasma membrane that serve to support multiple cellular functions, such as membrane potentials, regulation of cellular volume and pH, and co-transport of signaling transmitters in all animal cells. The α2Na(+)/K(+)-ATPase subunit isoform is predominantly expressed in astrocytes, which us the sharp Na(+)-gradient maintained by the sodium pump necessary for astroglial metabolism...
September 8, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28885690/global-analysis-of-gene-expression-profiles-in-the-submandibular-salivary-gland-of-klotho-knockout-mice
#19
Sung-Min Kwon, Soo-A Kim, Jung-Hoon Yoon, Jong-In Yook, Sang-Gun Ahn
Salivary dysfunction commonly occurs in many older adults and is considered a physiological phenomenon. However, the genetic changes in salivary glands during aging have not been characterized. The present study analyzed the gene expression profile in salivary glands from accelerated aging klotho deficient mice (klotho -/-, 4 weeks old). Microarray analysis showed that 195 genes were differentially expressed (z-score > 2 in two independent arrays) in klotho null mice compared to wild-type mice. Importantly, alpha2-Na(+) /K(+) -ATPase (Atp1a2), Ca(2+) -ATPase (Atp2a1), epidermal growth factor (EGF), and nerve growth factor (NGF), which have been suggested to be regulators of submandibular salivary gland function, were significantly decreased...
September 8, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28881573/histopathological-findings-of-renal-tissue-induced-by-oxidative-stress-due-to-different-concentrations-of-fluoride
#20
Qin Luo, Hengmin Cui, Huidan Deng, Ping Kuang, Huan Liu, Yujiao Lu, Jing Fang, Zhicai Zuo, Junliang Deng, Yinglun Li, Xun Wang, Ling Zhao
It has been reported that excessive intake of fluoride can induce renal lesions. However, its pathogenesis is still less understood. Therefore, this study was conducted to investigate oxidative damage and the relationships between the oxidative damage and renal lesions in fluoride-treated mice by using the methods of histopathology, biochemistry, flow cytometry and quantitative real-time polymerase chain reaction (qRT-PCR). A total of 240 ICR mice were randomly divided into four equal groups (sodium fluoride was given orally at the dose of 0, 12, 24 and 48 mg/kg body weight for 42 days, respectively)...
August 1, 2017: Oncotarget
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