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https://www.readbyqxmd.com/read/29036630/resequencing-epithelial-sodium-channel-genes-identifies-rare-variants-associated-with-blood-pressure-salt-sensitivity-the-gensalt-study
#1
Xiaoying Gu, Dongfeng Gu, Jiang He, Dabeeru C Rao, James E Hixson, Jichun Chen, Jianxin Li, Jianfeng Huang, Xigui Wu, Treva K Rice, Lawrence C Shimmin, Tanika N Kelly
BACKGROUND: A resequencing study of renal epithelial sodium channel (ENaC) genes was conducted to identify rare variants associated with BP salt-sensitivity. METHODS: The Genetic Epidemiology Network of Salt-Sensitivity (GenSalt) study was conducted among 1,906 participants who underwent a 7-day low-sodium followed by a 7-day high-sodium feeding-study. The 300 most salt-sensitive and 300 most salt-resistant GenSalt participants were selected for the resequencing study...
September 19, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/29028871/high-light-aggravates-functional-limitations-of-cucumber-canopy-photosynthesis-under-salinity
#2
Tsu-Wei Chen, Hartmut Stützel, Katrin Kahlen
Background and Aims: Most crop species are glycophytes, and salinity stress is one of the most severe abiotic stresses reducing crop yields worldwide. Salinity affects plant architecture and physiological functions by different mechanisms, which vary largely between crop species and determine the susceptibility or tolerance of a crop species to salinity. Methods: Experimental data from greenhouse cucumber (Cucumis sativus), a salt-sensitive species, grown under three salinity levels were interpreted by combining a functional-structural plant model and quantitative limitation analysis of photosynthesis...
September 19, 2017: Annals of Botany
https://www.readbyqxmd.com/read/29021382/sustained-activation-of-guanylate-cyclase-a-with-tdt-a-natriuretic-peptide-derivative-exhibits-cardiorenal-protection-in-dahl-salt-sensitive-hypertensive-rats
#3
Shohei Oishi, Naoko Suzuki, Yuri Hasui, Tsuyoshi Homma, Masanori Obana, Takahiro Nagayama, Yasushi Fujio
Heart failure often presents with prognosis-relevant impaired renal function. To investigate whether the chronic activation of guanylate cyclase-A (GC-A) protects both heart and kidney, we examined the effects of TDT, a neprilysin (NEP)-resistant natriuretic peptide (NP) derivative, on cardiac and renal dysfunction in Dahl salt-sensitive hypertensive rats (DS rats). Pretreatment with NEP or NEP inhibitor did not influence GC-A activation by TDT both in vitro and in vivo, resulting in a long-acting profile of TDT compared to native human atrial NP (hANP)...
October 11, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28993450/blood-pressure-genetic-risk-score-predicts-blood-pressure-responses-to-dietary-sodium-and-potassium-the-gensalt-study-genetic-epidemiology-network-of-salt-sensitivity
#4
Jovia L Nierenberg, Changwei Li, Jiang He, Dongfeng Gu, Jichun Chen, Xiangfeng Lu, Jianxin Li, Xigui Wu, C Charles Gu, James E Hixson, Dabeeru C Rao, Tanika N Kelly
We examined the association between genetic risk score (GRS) for blood pressure (BP), based on single nucleotide polymorphisms identified in previous BP genome-wide association study meta-analyses, and salt and potassium sensitivity of BP among participants of the GenSalt study (Genetic Epidemiology Network of Salt Sensitivity). The GenSalt study was conducted among 1906 participants who underwent a 7-day low-sodium (51.3 mmol sodium/d), 7-day high-sodium (307.8 mmol sodium/d), and 7-day high-sodium plus potassium (60 mmol potassium/d) intervention...
October 9, 2017: Hypertension
https://www.readbyqxmd.com/read/28985281/striatin-gene-polymorphic-variants-are-associated-with-salt-sensitive-blood-pressure-in-normotensives-and-hypertensives
#5
Tina Gupta, Molly Connors, Jia Wei Tan, Worapaka Manosroi, Noha Ahmed, Pei Yee Ting, Amanda E Garza, Jose R Romero, Paul N Hopkins, Jonathan S Williams, Gordon H Williams
BACKGROUND: Understanding the interactions between genetics, sodium (Na+) intake, and blood pressure (BP) will help overcome the lack of individual specificity in our current treatment of hypertension. This study had 3 goals: expand on the relationship between striatin gene (STRN) status and salt-sensitivity of BP (SSBP); evaluate the status of Na+ and volume regulating systems by striatin risk allele status; evaluate potential SSBP mechanisms. METHODS: We assessed the relationship between STRN status in humans (HyperPATH cohort) and SSBP and on volume regulated systems in humans and a striatin knockout mouse (STRN+/-)...
September 13, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28978980/role-of-bardoxolone-methyl-a-nuclear-factor-erythroid-2-related-factor-2-activator-in-aldosterone-and-salt-induced-renal-injury
#6
Mikako Hisamichi, Atsuko Kamijo-Ikemori, Takeshi Sugaya, Seiko Hoshino, Kenjiro Kimura, Yugo Shibagaki
The aim of this study was to investigate the renoprotective effect of bardoxolone methyl (BM), a nuclear factor erythroid 2-related factor 2 (Nrf2) activator with an antioxidant effect, in a salt-sensitive hypertension model induced by aldosterone (Ald) and salt. Tubulointerstitial damage with urinary liver-type fatty acid-binding protein (L-FABP) was evaluated using human L-FABP chromosomal transgenic (L-FABP(+/-)) male mice. The mice in the Ald group (n=7) received systemic Ald infusions via an osmotic minipump and were given 1% NaCl water for 35 days...
October 5, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28978533/non-invasive-measurement-of-renal-blood-flow-by-magnetic-resonance-imaging-mri-in-rats
#7
Cesar A Romero, Glauber Cabral, Robert A Knight, Guangliang Ding, Edward L Peterson, Oscar A Carretero
Renal blood flow (RBF) provides important information regarding renal physiology and nephropathies. Arterial spin labeling-magnetic resonance imaging (ASL-MRI) is a non-invasive method of measuring blood flow without exogenous contrast media. However, low signal/noise ratio and respiratory motion artifacts are challenges for RBF measurements in small animals. Our objective was to evaluate the feasibility and reproducibility of RBF measures by ASL-MRI using respiratory-gating and navigator correction methods to reduce motion artifacts...
October 4, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28974519/delayed-repolarization-underlies-ventricular-arrhythmias-in-rats-with-heart-failure-and-preserved-ejection-fraction
#8
Jae Hyung Cho, Rui Zhang, Peter J Kilfoil, Romain Gallet, Geoffrey de Couto, Catherine Bresee, Joshua I Goldhaber, Eduardo Marbán, Eugenio Cingolani
Background -Heart failure with preserved ejection fraction (HFpEF) represents approximately half of heart failure, and its incidence continues to increase. The leading cause of mortality in HFpEF is sudden death, but little is known about the underlying mechanisms. Methods -Dahl salt-sensitive rats were fed a high-salt diet (8% NaCl) from 7 weeks of age to induce HFpEF (n=38). Rats fed a normal-salt diet (0.3% NaCl) served as controls (n=13). Echocardiograms were performed to assess systolic and diastolic function from 14 weeks of age...
October 3, 2017: Circulation
https://www.readbyqxmd.com/read/28969799/hormonal-dynamics-during-salt-stress-responses-of-salt-sensitive-arabidopsis-thaliana-and-salt-tolerant-thellungiella-salsuginea
#9
Sylva Prerostova, Petre I Dobrev, Alena Gaudinova, Petr Hosek, Petr Soudek, Vojtech Knirsch, Radomira Vankova
Salt stress responses in salt-sensitive Arabidopsis thaliana (2-150mM NaCl) and the closely related salt-tolerant Thellungiella salsuginea (Eutrema halophila, 150-350mM NaCl) were compared to identify hormonal and transcriptomic changes associated with enhanced stress tolerance. Phytohormone levels, expression of selected genes, membrane stability, and Na(+) and K(+) concentrations were measured in shoot apices, leaves, and roots. Thellungiella exhibited higher salt stress tolerance associated with elevated basal levels of abscisic acid and jasmonic acid, and lower levels of active cytokinins (excluding cis-zeatin) in shoot apices...
November 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28968260/central-antihypertensive-effects-of-chronic-treatment-with-rb150-an-orally-active-aminopeptidase-a-inhibitor-in-deoxycorticosterone-acetate-salt-rats
#10
Yannick Marc, Reda Hmazzou, Fabrice Balavoine, Adrien Flahault, Catherine Llorens-Cortes
BACKGROUND AND OBJECTIVE: Hyperactivity of the brain renin-angiotensin (Ang) system has been implicated in the development and maintenance of hypertension. AngIII, one of the main effector peptides of the brain renin-Ang system, exerts a tonic stimulatory control over blood pressure (BP) in hypertensive rats. Aminopeptidase A (APA), the enzyme generating brain AngIII, represents a new therapeutic target for the treatment of hypertension. We developed RB150, a prodrug of the specific and selective APA inhibitor, EC33...
September 28, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28960144/blood-pressure-regulation-reviewing-evidence-for-interplay-between-common-dietary-sugars-and-table-salt
#11
Harry G Preuss, Dallas Clouatre, Anand Swaroop, Manashi Bagchi, Debasis Bagchi, Gilbert R Kaats
A popular concept is that the significant global progression in prevalence and intensification of elevated blood pressure (BP) levels is due in part to dietary indiscretions. Excess intake of several food sources causing overweight/obesity plays an important role in BP perturbations. However, certain nutrients are involved in ways other than via body fat accumulation, particularly table salt (sodium chloride) and popular refined carbohydrates like dietary sugars (sucrose, fructose, high fructose corn syrup)...
September 29, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28953589/salt-sensitivity-state-of-the-science
#12
Michael H Alderman
No abstract text is available yet for this article.
November 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28947705/identification-of-quantitative-trait-loci-for-salinity-tolerance-in-rice-oryza-sativa-l-using-ir29-hasawi-mapping-population
#13
J B Bizimana, A Luzi-Kihupi, Rosemary W Murori, R K Singh
Salinity is the second most important abiotic stress after drought that hampers rice production, especially in south and Southeast Asia. Breeding approach supplemented with molecularmarkers-assisted selection is the most promising approach in terms of efficiency to increase the productivity under salt-affected soils. Thirty-day-old rice seedlings of 300 F5:6 recombinant-inbred lines derived from a cross between the salt sensitive, IR29 (indica), and a salt tolerant, Hasawi (aus), were used to identify quantitative trait loci (QTLs) linked to salinity tolerance...
September 2017: Journal of Genetics
https://www.readbyqxmd.com/read/28940950/rosuvastatin-pretreatment-suppresses-distant-organ-injury-following-unilateral-renal-ischemia-reperfusion-in-hypertensive-dahl-salt-sensitive-rats
#14
Makoto Kanno, Masaaki Nakayama, Wan-Jun Zhu, Yoshimitsu Hayashi, Junichiro James Kazama
AIM: Ischemia-reperfusion (I/R) induces distant organ injury (DOI) via inflammation and oxidative stress. Statins have anti-inflammatory and anti-oxidant effects independent of their cholesterol-lowering properties. To clarify whether statins could suppress DOI, we investigated the effect of rosuvastatin (RO) on the contralateral kidney following unilateral renal I/R. METHODS: Dahl salt-sensitive rats (6-week-old) were randomly divided into four groups: sham, sham with RO, I/R, and I/R with RO...
September 22, 2017: Nephrology
https://www.readbyqxmd.com/read/28938457/the-association-of-estrogen-receptor-%C3%AE-gene-variation-with-salt-sensitive-blood-pressure
#15
Worapaka Manosroi, Jia Wei Tan, Chevon M Rariy, Bei Sun, Mark O Goodarzi, Aditi R Saxena, Jonathan S Williams, Luminita H Pojoga, Jessica Lasky-Su, Jinrui Cui, Xiuqing Guo, Kent D Taylor, Yii-Der I Chen, Anny H Xiang, Willa A Hsueh, Leslie J Raffel, Thomas A Buchanan, Jerome I Rotter, Gordon H Williams, Ellen W Seely
Context: Hypertension in young women is uncommon compared to young men and older women. Estrogen appears to protect most women against hypertension with incidence increasing after menopause. Since some premenopausal women develop hypertension, estrogen may play a different role in these women. Genetic variations in the estrogen receptor (ER) are associated with cardiovascular disease. ER-β, encoded by ESR2, is the ER predominantly expressed in vascular smooth muscle. Objective: To determine an association of single nucleotide polymorphisms (SNPs) in ESR2 with salt-sensitivity of blood pressure (SSBP) and estrogen status in women...
September 5, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28938454/11%C3%AE-hsd2-sumoylation-modulates-cortisol-induced-mineralocorticoid-receptor-nuclear-translocation-independently-of-effects-on-transactivation
#16
Rubén Jiménez-Canino, Fabián Lorenzo-Díaz, Alex Odermatt, Matthew A Bailey, Dawn E W Livingstone, Frederic Jaisser, Nicolette Farman, Diego Alvarez de la Rosa
The enzyme 11β-hydroxysteroid dehydrogenase type 2 (11β-HSD2) has an essential role in aldosterone target tissues, conferring aldosterone selectivity for the mineralocorticoid receptor (MR) by converting 11β-hydroxyglucocorticoids to inactive 11-ketosteroids. Congenital deficiency of 11β-HSD2 causes a form of salt-sensitive hypertension known as the syndrome of apparent mineralocorticoid excess. The disease phenotype, which ranges from mild to severe, correlates well with reduction in enzyme activity. Furthermore, polymorphisms in the 11β-HSD2 coding gene (HSD11B2) have been linked to high blood pressure and salt-sensitivity, major cardiovascular risk factors...
September 15, 2017: Endocrinology
https://www.readbyqxmd.com/read/28931751/essential-role-of-kir5-1-channels-in-renal-salt-handling-and-blood-pressure-control
#17
Oleg Palygin, Vladislav Levchenko, Daria V Ilatovskaya, Tengis S Pavlov, Oleh M Pochynyuk, Howard J Jacob, Aron M Geurts, Matthew R Hodges, Alexander Staruschenko
Supplementing diets with high potassium helps reduce hypertension in humans. Inwardly rectifying K+ channels Kir4.1 (Kcnj10) and Kir5.1 (Kcnj16) are highly expressed in the basolateral membrane of distal renal tubules and contribute to Na+ reabsorption and K+ secretion through the direct control of transepithelial voltage. To define the importance of Kir5.1 in blood pressure control under conditions of salt-induced hypertension, we generated a Kcnj16 knockout in Dahl salt-sensitive (SS) rats (SSKcnj16-/-). SSKcnj16-/- rats exhibited hypokalemia and reduced blood pressure, and when fed a high-salt diet (4% NaCl), experienced 100% mortality within a few days triggered by salt wasting and severe hypokalemia...
September 21, 2017: JCI Insight
https://www.readbyqxmd.com/read/28929577/salt-intake-and-blood-pressure-response-to-percutaneous-renal-denervation-in-resistant-hypertension
#18
Esther de Beus, Rosa L de Jager, Martine M Beeftink, Margreet F Sanders, Wilko Spiering, Evert-Jan Vonken, Michiel Voskuil, Michiel L Bots, Peter J Blankestijn
The effect of lowering sympathetic nerve activity by renal denervation (RDN) is highly variable. With the exception of office systolic blood pressure (BP), predictors of the BP-lowering effect have not been identified. Because dietary sodium intake influences sympathetic drive, and, conversely, sympathetic activity influences salt sensitivity in hypertension, we investigated 24-hour urinary sodium excretion in participants of the SYMPATHY trial. SYMPATHY investigated RDN in patients with resistant hypertension...
September 19, 2017: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/28929450/intrarenal-angiotensin-converting-enzyme-the-old-and-the-new
#19
REVIEW
Silas Culver, Caixia Li, Helmy M Siragy
PURPOSE OF REVIEW: The intrarenal renin-angiotensin-aldosterone system (RAS) is an independent paracrine hormonal system with an increasingly prominent role in hypertension and renal disease. Two enzyme components of this system are angiotensin-converting enzyme (ACE) and more recently discovered ACE2. The purpose of this review is to describe recent discoveries regarding the roles of intrarenal ACE and ACE2 and their interaction. RECENT FINDINGS: Renal tubular ACE contributes to salt-sensitive hypertension...
September 19, 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/28927022/salt-stress-response-mechanisms-using-de-novo-transcriptome-sequencing-of-salt-tolerant-and-sensitive-corchorus-spp-genotypes
#20
Zemao Yang, Ruike Lu, Zhigang Dai, An Yan, Qing Tang, Chaohua Cheng, Ying Xu, Wenting Yang, Jianguang Su
High salinity is a major environmental stressor for crops. To understand the regulatory mechanisms underlying salt tolerance, we conducted a comparative transcriptome analysis between salt-tolerant and salt-sensitive jute (Corchorus spp.) genotypes in leaf and root tissues under salt stress and control conditions. In total, 68,961 unigenes were identified. Additionally, 11,100 unigenes (including 385 transcription factors (TFs)) exhibited significant differential expression in salt-tolerant or salt-sensitive genotypes...
September 18, 2017: Genes
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