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https://www.readbyqxmd.com/read/29146141/the-myth-of-water-and-salt-from-aquaretics-to-tenapanor
#1
REVIEW
Luca Visconti, Valeria Cernaro, Sebastiano Calimeri, Antonio Lacquaniti, Francesca De Gregorio, Carlo Alberto Ricciardi, Viviana Lacava, Domenico Santoro, Michele Buemi
The impact of water intake has been studied in several renal diseases. For example, increasing water intake is useful to prevent primary and secondary nephrolithiasis. In autosomal dominant polycystic kidney disease, arginine vasopressin (AVP) is involved in the progression of the disease, and water intake could play a therapeutic role by inhibiting the synthesis of AVP, but its efficacy is still controversial. Conversely, the use of aquaretics, which are antagonists of AVP V2 receptors, results in the reduction of the increase rate of total kidney volume with a slower decline of glomerular filtration rate...
November 14, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/29144825/salt-hypertension-and-immunity
#2
A Justin Rucker, Nathan P Rudemiller, Steven D Crowley
The link between inappropriate salt retention in the kidney and hypertension is well recognized. However, growing evidence suggests that the immune system can play surprising roles in sodium homeostasis, such that the study of inflammatory cells and their secreted effectors has provided important insights into salt sensitivity. As part of the innate immune system, myeloid cells have diverse roles in blood pressure regulation, ranging from prohypertensive actions in the kidney, vasculature, and brain, to effects in the skin that attenuate blood pressure elevation...
November 16, 2017: Annual Review of Physiology
https://www.readbyqxmd.com/read/29143823/salt-responsive-gut-commensal-modulates-th17-axis-and-disease
#3
Nicola Wilck, Mariana G Matus, Sean M Kearney, Scott W Olesen, Kristoffer Forslund, Hendrik Bartolomaeus, Stefanie Haase, Anja Mähler, András Balogh, Lajos Markó, Olga Vvedenskaya, Friedrich H Kleiner, Dmitry Tsvetkov, Lars Klug, Paul I Costea, Shinichi Sunagawa, Lisa Maier, Natalia Rakova, Valentin Schatz, Patrick Neubert, Christian Frätzer, Alexander Krannich, Maik Gollasch, Diana A Grohme, Beatriz F Côrte-Real, Roman G Gerlach, Marijana Basic, Athanasios Typas, Chuan Wu, Jens M Titze, Jonathan Jantsch, Michael Boschmann, Ralf Dechend, Markus Kleinewietfeld, Stefan Kempa, Peer Bork, Ralf A Linker, Eric J Alm, Dominik N Müller
A Western lifestyle with high salt consumption can lead to hypertension and cardiovascular disease. High salt may additionally drive autoimmunity by inducing T helper 17 (TH17) cells, which can also contribute to hypertension. Induction of TH17 cells depends on gut microbiota; however, the effect of salt on the gut microbiome is unknown. Here we show that high salt intake affects the gut microbiome in mice, particularly by depleting Lactobacillus murinus. Consequently, treatment of mice with L. murinus prevented salt-induced aggravation of actively induced experimental autoimmune encephalomyelitis and salt-sensitive hypertension by modulating TH17 cells...
November 15, 2017: Nature
https://www.readbyqxmd.com/read/29140729/gene-expression-and-gene-associations-during-the-development-of-heart-failure-with-preserved-ejection-fraction-in-the-dahl-salt-sensitive-model-of-hypertension
#4
Jeffrey Yim, Hyokeun Cho, Simon W Rabkin
Gene expression and associations were examined in a model of heart failure with preserved ejection fraction (HFpEF), a condition with minimal effective treatment. Genes with at least two studies showing significant changes in Dahl rat with heart failure were examined by meta-analysis. Significantly increased in expression were iNOS, p47phox, ADM, ANP, OPN, ACE, MCP-1, GP91PHOX, ICAM-1, TGF-β1, CTGF, ET-1, p22phox, ETB, BNP, ETA, MMP13, Col1a1, MMP2, TIMP1, Col3a1, Il-1β, β-MHC, ECE1, MMP14, AGT, and MMP9...
November 15, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29139339/high-prevalence-of-hypertension-and-its-selected-risk-factors-among-adult-tribal-population-in-central-india
#5
Tapas Chakma, Arvind Kavishwar, Ravendra K Sharma, P Vinay Rao
A community based cross-sectional study was carried out to assess the prevalence of hypertension and associated risk factors like salt intake, 24-h urinary sodium excretion and body mass index (BMI) among tribal population of Mandla District, Central India. A total of 3090 individuals, from 1258 house hold drawn from 33 sampled villages and 12 urban wards were studied for blood pressure measurements and clinical examination, while 414 urine samples were collected for estimation of 24-h sodium excretion. Bivariate and multivariate logistic regression were used to assess the associations of BMI, urinary sodium output and other risk factors with hypertension...
October 2017: Pathogens and Global Health
https://www.readbyqxmd.com/read/29138984/11%C3%AE-hydroxysteroid-dehydrogenases-and-hypertension-in-the-metabolic-syndrome
#6
REVIEW
Matthew A Bailey
The metabolic syndrome describes a clustering of risk factors-visceral obesity, dyslipidaemia, insulin resistance, and salt-sensitive hypertension-that increases mortality related to cardiovascular disease, type 2 diabetes, cancer, and non-alcoholic fatty liver disease. The prevalence of these concurrent comorbidities is ~ 25-30% worldwide, and metabolic syndrome therefore presents a significant global public health burden. Evidence from clinical and preclinical studies indicates that glucocorticoid excess is a key causal feature of metabolic syndrome...
November 14, 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/29133363/prevalence-of-hypertensive-phenotypes-after-preeclampsia-a-prospective-cohort-study
#7
Agnès Ditisheim, Grégoire Wuerzner, Belen Ponte, Yvan Vial, Olivier Irion, Michel Burnier, Michel Boulvain, Antoinette Pechère-Bertschi
Preeclampsia is associated with increased cardiovascular and renal risk. The aim of this prospective cohort study was to characterize the early postpartum blood pressure (BP) profile after preeclampsia. We enrolled 115 women with preeclampsia and 41 women with a normal pregnancy in a prospective cohort study. At 6 to 12 week postpartum, we assessed the prevalence of different hypertensive phenotypes using 24-hour ambulatory BP monitoring (ABPM), as well as the risk of salt sensitivity and the variability of BP derived from ABPM parameters...
November 13, 2017: Hypertension
https://www.readbyqxmd.com/read/29132172/can-screening-and-confirmatory-testing-in-the-management-of-patients-with-primary-aldosteronism-be-improved
#8
Michael Stowasser, Ashraf Ahmed, Zeng Guo, Martin Wolley, Jacobus Ungerer, Brett McWhinney, Marko Poglitsch, Richard Gordon
Widespread application of the plasma aldosterone/renin ratio (ARR) as a screening test has led to the recognition that primary aldosteronism (PA) is the most common specifically treatable and potentially curable form of hypertension, accounting for 5-10% of patients. Maximal detection requires accurate diagnostic approaches and awareness and control of factors that confound results, including most antihypertensives, posture, time of day, dietary salt, and plasma potassium. Recent studies have revealed potential for false positives in patients on beta-adrenoceptor blockers, and, when direct renin concentration (but not plasma renin activity) is used to measure renin, in women during the luteal phase of the menstrual cycle or receiving estrogen-containing contraceptives or hormonal replacement therapy...
November 13, 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/29130499/combined-metabolomic-and-correlation-networks-analyses-reveal-fumarase-insufficiency-altered-amino-acids-metabolism
#9
Entai Hou, Xian Li, Zerong Liu, Fuchang Zhang, Zhongmin Tian
Fumarase catalyzes the interconversion of fumarate and L-malate in the tricarboxylic acid cycle. Fumarase insufficiencies were associated with increased level of fumarate and decreased level of malate and exacerbated salt-induced hypertension. To gain insights into the metabolism profiles that induced by fumarase insufficiency and identify key regulatory metabolites, we applied a GC-MS based metabolomics platform coupled with a network approach to analyze fumarase insufficient HUVEC cells and negative controls...
November 11, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29129584/high-salt-loading-induces-urinary-storage-dysfunction-via-upregulation-of-epithelial-sodium-channel-alpha-in-the-bladder-epithelium-in-dahl-salt-sensitive-rats
#10
Seiji Yamamoto, Yuji Hotta, Kotomi Maeda, Tomoya Kataoka, Yasuhiro Maeda, Takashi Hamakawa, Yasuhiro Shibata, Shoichi Sasaki, Shinya Ugawa, Takahiro Yasui, Kazunori Kimura
We aimed to investigate whether high salt intake affects bladder function via epithelial sodium channel (ENaC) by using Dahl salt-resistant (DR) and salt-sensitive (DS) rats. Bladder weight of DR + high-salt diet (HS, 8% NaCl) and DS + HS groups were significantly higher than those of DR + normal-salt diet (NS, 0.3% NaCl) and DS + NS groups after one week treatment. We thereafter used only DR + HS and DS + HS group. Systolic and diastolic blood pressures were significantly higher in DS + HS group than in DR + HS group after the treatment period...
October 10, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29128399/nitric-oxide-production-by-glomerular-podocytes
#11
Oleg Palygin, Daria V Ilatovskaya, Vladislav Levchenko, Bradley T Endres, Aron M Geurts, Alexander Staruschenko
Nitric Oxide (NO), a potent vasodilator and vital signaling molecule, has been shown to contribute to the regulation of glomerular ultrafiltration. However, whether changes in NO occur in podocytes during the pathogenesis of salt-sensitive hypertension has not yet been thoroughly examined. We showed here that podocytes produce NO, and further hypothesized that hypertensive animals would exhibit reduced NO production in these cells in response to various paracrine factors, which might contribute to the damage of glomeruli filtration barrier and development of proteinuria...
November 8, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29126194/central-and-peripheral-slow-pressor-mechanisms-contributing-to
#12
Jiao Lu, Hong-Wei Wang, Monir Ahmad, Marzieh Keshtkar-Jahromi, Mordecai P Blaustein, John Hamlyn, Frans H H Leenen
Aims: High salt intake markedly enhances hypertension induced by angiotensin II (Ang II). We explored central and peripheral slow-pressor mechanisms which may be activated by Ang II and salt. Methods and Results: In Protocol I, Wistar rats were infused subcutaneously with low- dose Ang II (150 ng/kg/min) and fed regular (0.4%) or high salt (2%) diet for 14 days. In Protocol II, Ang II -high salt was combined with intracerebroventricular infusion of mineralocorticoid receptor (MR) blockers (eplerenone, spironolactone), epithelial sodium channel (ENaC) blocker (benzamil), angiotensin II type 1 receptor (AT1R) blocker (losartan) or vehicles...
November 8, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29120957/deletion-of-protein-kinase-b2-preserves-cardiac-function-by-blocking-interleukin-6-mediated-injury-and-restores-blood-pressure-during-angiotensin-ii-high-salt-diet-induced-hypertension
#13
Shuai Yang, Dandan Chen, Fan Chen, Xinmei Zhao, Yubin Zhang, Zhe Li, Liang Jin, Yitao Xu, Daniel Sanchis, Junmei Ye
OBJECTIVE: Protein kinase B2 (AKT2) is implicated in cardiomyocyte survival during various stress conditions. However, the role of AKT2 in heart function, cardiac hypertrophy and blood pressure (BP) control during hypertension is not fully understood. Therefore, we sought to determine whether the deletion of AKT2 protects cardiac function during angiotensin II/high-salt-diet (AngII/HSD) treatment and find out the signaling pathway. METHODS: Male C57BL/6J (wild type), AKT2 knockout and interleukin (IL)-6 knockout mice were fed a 4% NaCl diet for 5 weeks...
November 8, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/29118017/role-of-immune-factors-in-angiotensin-ii-induced-hypertension-and-renal-damage-in-dahl-salt-sensitive-rats
#14
Brittany Wade, Galina Petrova, David L Mattson
The present study assessed the importance of immunity in AngII (5 ng/kg/min, iv)-mediated hypertension in Dahl Salt Sensitive (SS) rats and SS rats deficient in T- and B-lymphocytes (SS (Rag1-/-)) fed a 0.4% NaCl diet. Baseline mean arterial blood pressure (MAP) was not different between groups. AngII infusion significantly increased MAP in both groups; though MAP increased more rapidly in SS, and the maximal MAP achieved in SS (190±3 mmHg) was significantly greater than that in SS(Rag1-/-) (177±3 mmHg) after 12 days...
November 8, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29117620/the-effects-of-a-modified-high-carbohydrate-high-fat-diet-on-metabolic-syndrome-parameters-in-male-rats
#15
Sok Kuan Wong, Kok-Yong Chin, Farihah Hj Suhaimi, Fairus Ahmad, Soelaiman Ima-Nirwana
Metabolic syndrome is a cluster of metabolic abnormalities including central obesity, hyperglycemia, hypertension, and dyslipidemia. A previous study has established that high-carbohydrate high-fat diet (HCHF) can induce MetS in rats. In this study, we modified components of the diet so that it resembled the diet of Southeast Asians. This study aimed to determine the effects of this modified HCHF diet on metabolic parameters in rats. Male Wistar rats (n=14) were randomised into two groups. The normal group was given standard rat chow...
November 8, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/29114946/reported-gum-disease-as-a-cardiovascular-risk-factor-in-adults-with-intellectual-disabilities
#16
K Hsieh, S Murthy, T Heller, J H Rimmer, G Yen
BACKGROUND: Several risk factors for cardiovascular disease (CVD) have been identified among adults with intellectual disabilities (ID). Periodontitis has been reported to increase the risk of developing a CVD in the general population. Given that individuals with ID have been reported to have a higher prevalence of poor oral health than the general population, the purpose of this study was to determine whether adults with ID with informant reported gum disease present greater reported CVD than those who do not have reported gum disease and whether gum disease can be considered a risk factor for CVD...
November 8, 2017: Journal of Intellectual Disability Research: JIDR
https://www.readbyqxmd.com/read/29113921/antihypertensive-responses-of-vasoactive-androgens-in-an-in-vivo-experimental-model-of-preeclampsia
#17
Mercedes Perusquía, Andrea E Hanson, Claudia M Meza, Cris Kubli, Nieves Herrera, John N Stallone
Dehydroepiandrosterone (DHEA), testosterone (TES) and its 5-reduced metabolites induce a nongenomic vasorelaxation in several vascular beds of mammals; similarly these hormones produce systemic hypotensive and antihypertensive responses in normotensive and hypertensive male rats. Thus, it was hypothesized that the antihypertensive response of androgens, whose levels are elevated during gestation, protect against gestational hypertension. An animal model of preeclampsia was induced in female Wistar rats using DOCA-salt-treated pregnant (PT) and normal pregnant (NP) rats...
November 4, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29110801/enhanced-electrical-field-stimulated-nitrergic-and-purinergic-vasoreactivity-in-distal-vs-proximal-internal-pudendal-arteries
#18
Michael R Odom, Elena S Pak, David A Brown, Johanna L Hannan
BACKGROUND: The internal pudendal arteries (IPAs) supply blood to the penis and are highly susceptible to vascular remodeling in rodent models of diabetes, hypertension, aging, and chronic kidney disease, thus contributing to erectile dysfunction. Interestingly, vascular remodeling primarily occurs in the distal and not in the proximal IPA, suggesting distinct local physiologic signaling differences within the IPA. AIM: To examine the role of purinergic signaling and neurotransmitter release by electrical field stimulation (EFS) in the regulation of proximal and distal IPA vascular tone...
November 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29109190/trpv4-transient-receptor-potential-vanilloid-4-mediates-endothelium-dependent-contractions-in-the-aortae-of-hypertensive-mice
#19
Peng Zhang, Chunyuan Sun, Hongjuan Li, Chunlei Tang, Hao Kan, Zhenyu Yang, Aiqin Mao, Xin Ma
The role of TRPV4 (transient receptor potential vanilloid 4) in regulating vascular contraction in hypertensive mice is poorly established. We tested the hypothesis that TRPV4 regulates endothelium-dependent contractions in aortae from hypertensive mice through the activation of cytosolic cPLA2 (phospholipase A2) and COX2 (cyclooxygenase 2) and identified the possible endothelium-derived contracting factor generated by COX2. Using myography, we demonstrated that GSK1016790A (a TRPV4 agonist) and acetylcholine (ACh) trigger endothelium-dependent contractions in aortae from hypertensive mice, and the contractions were abolished with TRPV4 deletion...
November 6, 2017: Hypertension
https://www.readbyqxmd.com/read/29098651/excess-body-weight-insulin-resistance-and-isolated-systolic-hypertension-potential-pathophysiological-links
#20
Lanfranco D'Elia, Pasquale Strazzullo
Isolated systolic hypertension, the most common form of hypertension in the elderly, but also detectable among young and middle-aged subjects, is independently associated with higher risk of cardiovascular events and all-cause mortality. Among various pathophysiological changes associated with aging, excess body weight and insulin resistance may predispose to this type of hypertension. Overweight or frank obesity and their frequent companion insulin resistance could mediate the development of isolated systolic hypertension through increase in the renin-angiotensin-aldosterone system activity, in the sympathetic tone and in salt-sensitivity, all in turn leading to endothelial dysfunction, arterial stiffness and increase in blood pressure...
November 2, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
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