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https://www.readbyqxmd.com/read/28230374/dual-thermoresponsive-aggregation-of-schizophrenic-pdmaema-b-psbma-copolymer-with-an-unrepeatable-ph-response-and-a-recycled-co2-n2-response
#1
Hui Sun, Xiaolu Chen, Xia Han, Honglai Liu
A dual-thermoresponsive block copolymer of poly[2-(dimethylamino)ethyl methacrylate]-block-poly(sulfobetaine methacrylate) (PDMAEMA-b-PSBMA) exhibited reversible schizophrenic aggregation behavior in water because of the upper critical solution temperature (UCST) of the PSBMA block and the lower critical solution temperature (LCST) of the PDMAEMA block. Both the UCST and LCST shifted to lower values with increasing DMAEMA/SBMA block ratios, which was ascribed to the hydrophobic/hydrophilic balance of both blocks...
February 23, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28225041/pvn-blockade-of-p44-42-mapk-pathway-attenuates-salt-induced-hypertension-through-modulating-neurotransmitters-and-attenuating-oxidative-stress
#2
Hong-Li Gao, Xiao-Jing Yu, Kai-Li Liu, Xiao-Lian Shi, Jie Qi, Yan-Mei Chen, Yan Zhang, Juan Bai, Qiu-Yue Yi, Zhi-Peng Feng, Wen-Sheng Chen, Wei Cui, Jin-Jun Liu, Guo-Qing Zhu, Yu-Ming Kang
The imbalance of neurotransmitters and excessive oxidative stress responses contribute to the pathogenesis of hypertension. In this study, we determined whether blockade of p44/42 MAPK pathway in the hypothalamic paraventricular nucleus (PVN) ameliorates the development of hypertension through modulating neurotransmitters and attenuating oxidative stress. Dahl salt-sensitive (S) rats received a high-salt diet (HS, 8% NaCl) or a normal-salt diet (NS, 0.3% NaCl) for 6 weeks and were treated with bilateral PVN infusion of PD-98059 (0...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220030/novel-paradigms-of-salt-and-hypertension
#3
Wenguang Feng, Louis J Dell'Italia, Paul W Sanders
Salt resistance/sensitivity refers specifically to the effect of dietary sodium chloride (salt) intake on BP. Increased dietary salt intake promotes an early and uniform expansion of extracellular fluid volume and increased cardiac output. To compensate for these hemodynamic changes and maintain constant BP in salt resistance, renal and peripheral vascular resistance falls and is associated with an increase in production of nitric oxide. In contrast, the decline in peripheral vascular resistance and the increase in nitric oxide are impaired or absent in salt sensitivity, promoting an increase in BP in these individuals...
February 20, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28214884/transient-receptor-potential-melastatin-4-trpm4-contributes-to-high-salt-diet-mediated-early-stage-endothelial-injury
#4
Xiao-Qing Ding, Tao Ban, Zeng-Yan Liu, Jie Lou, Liang-Liang Tang, Jia-Xin Wang, Wen-Feng Chu, Dan Zhao, Bin-Lin Song, Zhi-Ren Zhang
BACKGROUND/AIMS: The present study investigated whether the transient receptor potential melastatin 4 (TRPM4) channel plays a role in high salt diet (HSD)-induced endothelial injuries. METHODS: Western blotting and immunofluorescence were used to examine TRPM4 expression in the mesenteric endothelium of Dahl salt-sensitive (SS) rats fed a HSD. The MTT, TUNEL, and transwell assays were used to evaluate the cell viability, cell apoptosis, and cell migration, respectively, of human umbilical vein endothelial cells (HUVECs)...
February 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28199472/resequencing-study-identifies-rare-renin-angiotensin-aldosterone-system-variants-associated-with-blood-pressure-salt-sensitivity-the-gensalt-study
#5
Tanika N Kelly, Changwei Li, James E Hixson, Dongfeng Gu, Dabeeru C Rao, Jianfeng Huang, Treva K Rice, Jichun Chen, Jie Cao, Jianxin Li, Christopher E Anderson, Jiang He
No abstract text is available yet for this article.
February 11, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28197417/basal-and-activated-calcium-sensitization-mediated-by-rhoa-rho-kinase-pathway-in-rats-with-genetic-and-salt-hypertension
#6
Michal Behuliak, Michal Bencze, Ivana Vaněčková, Jaroslav Kuneš, Josef Zicha
Calcium sensitization mediated by RhoA/Rho kinase pathway can be evaluated either in the absence (basal calcium sensitization) or in the presence of endogenous vasoconstrictor systems (activated calcium sensitization). Our aim was to compare basal and activated calcium sensitization in three forms of experimental hypertension with increased sympathetic tone and enhanced calcium entry-spontaneously hypertensive rats (SHR), heterozygous Ren-2 transgenic rats (TGR), and salt hypertensive Dahl rats. Activated calcium sensitization was determined as blood pressure reduction induced by acute administration of Rho kinase inhibitor fasudil in conscious rats with intact sympathetic nervous system (SNS) and renin-angiotensin system (RAS)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28193784/impaired-myogenic-response-of-the-afferent-arteriole-contributes-to-the-increased-susceptibility-to-renal-disease-in-milan-normotensive-rats
#7
Ying Ge, Fan Fan, Sean P Didion, Richard J Roman
Milan normotensive (MNS) rats are more susceptible to the development of renal disease than Milan hypertensive (MHS) rats, but the genes and pathways involved are unknown. This study compared the myogenic response of isolated perfused afferent arterioles (Af-Art) and autoregulation of renal blood flow (RBF) and glomerular capillary pressure (Pgc) in 6-9-week-old MNS and MHS rats. The diameter of the Af-Art of MHS rats decreased significantly from 14.3 ± 0.5 to 11.5 ± 0.6 μm when perfusion pressure was elevated from 60 to 120 mmHg...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28191739/itraq-based-quantitative-proteomic-analysis-of-wheat-roots-in-response-to-salt-stress
#8
Qiyan Jiang, Xiaojuan Li, Fengjuan Niu, Xianjun Sun, Zheng Hu, Hui Zhang
Salinity is a major abiotic stress that affects plant growth and development. Plant roots are the sites of salt uptake. Here, an isobaric tag for a relative and absolute quantitation (iTRAQ)-based proteomic technique was employed to identify the differentially expressed proteins (DEPs) from seedling roots of the salt-tolerant genotype Han 12 and the salt-sensitive genotype Jimai 19 in response to salt treatment. A total of 121 NaCl-responsive DEPs were observed in Han 12 and Jimai 19. The main DEPs were ubiquitination-related proteins, transcription factors, pathogen-related proteins, membrane intrinsic protein transporters and antioxidant enzymes, which may work together to obtain cellular homeostasis in roots and determine the overall salt tolerance of different wheat varieties in response to salt stress...
February 13, 2017: Proteomics
https://www.readbyqxmd.com/read/28190873/the-role-of-uric-acid-in-hypertension-of-adolescents-prehypertension-and-salt-sensitivity-of-blood-pressure
#9
Yang Wang, Jia-Wen Hu, Yong-Bo Lv, Chao Chu, Ke-Ke Wang, Wen-Ling Zheng, Yu-Meng Cao, Zu-Yi Yuan, Jian-Jun Mu
Uric acid is the end product of purine metabolism. Metabolic disorders of uric acid are associated with many disease states. Substantial evidence suggests the possible role of uric acid as a mediator of high blood pressure. Elevated uric acid is closely associated with new onset essential hypertension in adolescents and prehypertension; and urate-lowering agents can significantly improve these early stages of hypertension. Uric acid also influences salt sensitivity of blood pressure through two phases. Local renin-angiotensin-aldosterone system activation initiates renal damage, arteriolopathy, and endothelium dysfunction, which is followed by the dysregulation of sodium homeostasis, thereby leading to increased salt sensitivity...
February 13, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28179101/molecular-phylogenomic-study-and-the-role-of-exogenous-spermidine-in-the-metabolic-adjustment-of-endogenous-polyamine-in-two-rice-cultivars-under-salt-stress
#10
Jayita Saha, Kalyan Giri
Compelling evidences anticipated the well acclamation of involvement of exogenous and endogenous polyamines (PAs) in conferring salt tolerance in plants. Intracellular PA's anabolism and catabolism should have contributed to maintain endogenous PAs homeostasis to induce stress signal networks. In this report, the evolutionary study has been conducted to reveal the phylogenetic relationship of genes encoding enzymes of the anabolic and catabolic pathway of PAs among the five plant lineages including green algae, moss, lycophyte, dicot and monocot along with their respective exon-intron structural patterns...
April 20, 2017: Gene
https://www.readbyqxmd.com/read/28177594/investigation-of-chemosensitivity-during-and-after-an-acute-cold
#11
Robert Pellegrino, Ute Walliczek-Dworschak, Gudrun Winter, David Hull, Thomas Hummel
BACKGROUND: Viral rhinitis (the "common" cold) is a frequent worldwide disease. Olfactory dysfunction is one complication that arises during infection, which in most cases heals up spontaneously upon recovery, whereas in some cases it may persist as a partial or total loss of olfaction. The aim of this prospective study was to investigate the change of other chemosensory systems during a cold. METHODS: Fifty-eight patients (age 18 to 69 years) with an acute cold were compared to a healthy control group (n = 59; age 19 to 63 years)...
February 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28163836/how-far-cardio-metabolic-and-psychological-factors-affect-salt-sensitivity-in-normotensive-adult-population
#12
Masoumeh Sadeghi, Hamidreza Roohafza, Masoud Pourmoghaddas, Omid Behnamfar, Zahra Pourmoghaddas, Ebrahim Heidari, Zahra Mahjoor, Mehdi Mousavi, Ahmad Bahonar, Nizal Sarrafzadegan
AIM: To evaluate the prevalence of salt sensitivity and the impact of cardiometabolic and psychological characteristics on salt sensitivity in normotensive population. METHODS: Of all participants, anthropometric measurements and fasting venous blood samples were collected, and study questionnaires were completed. Salt Sensitivity was defined based on the difference in mean arterial pressure with infusion of 2 L of normal saline followed by a low sodium diet and administration of three doses of oral furosemide the day after...
January 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28122029/characterization-of-two-antimicrobial-peptides-from-antarctic-fishes-notothenia-coriiceps-and-parachaenichthys-charcoti
#13
Seung Chul Shin, In Hye Ahn, Do Hwan Ahn, Yung Mi Lee, Jungeun Lee, Jun Hyuck Lee, Han-Woo Kim, Hyun Park
We identified two antimicrobial peptides (AMPs) with similarity to moronecidin in Antarctic fishes. The characteristics of both AMPs were determined using moronecidin as a control. Moronecidin, which was first isolated from hybrid striped bass, is highly salt-resistant, and possesses broad-spectrum activity against various microbes. The moronecidin-like peptide from Notothenia coriiceps exhibited a narrower spectrum of activity and a higher salt sensitivity than moronecidin. The AMP from Parachaenichthys charcoti exhibited similar antimicrobial activity to moronecidin, and similar salt sensitivity...
2017: PloS One
https://www.readbyqxmd.com/read/28118075/dietary-spermidine-for-lowering-high-blood-pressure
#14
Tobias Eisenberg, Mahmoud Abdellatif, Andreas Zimmermann, Sabrina Schroeder, Tobias Pendl, Alexandra Harger, Slaven Stekovic, Julia Schipke, Christoph Magnes, Albrecht Schmidt, Christoph Ruckenstuhl, Christopher Dammbrueck, Angelina S Gross, Viktoria Herbst, Didac Carmona-Gutierrez, Federico Pietrocola, Thomas R Pieber, Stephan J Sigrist, Wolfgang A Linke, Christian Mühlfeld, Junichi Sadoshima, Joern Dengjel, Stefan Kiechl, Guido Kroemer, Simon Sedej, Frank Madeo
Loss of cardiac macroautophagy/autophagy impairs heart function, and evidence accumulates that an increased autophagic flux may protect against cardiovascular disease. We therefore tested the protective capacity of the natural autophagy inducer spermidine in animal models of aging and hypertension, which both represent major risk factors for the development of cardiovascular disease. Dietary spermidine elicits cardioprotective effects in aged mice through enhancing cardiac autophagy and mitophagy. In salt-sensitive rats, spermidine supplementation also delays the development of hypertensive heart disease, coinciding with reduced arterial blood pressure...
January 24, 2017: Autophagy
https://www.readbyqxmd.com/read/28110201/influence-of-soil-types-and-osmotic-pressure-on-growth-and-137-cs-accumulation-in-blackgram-vigna-mungo-l
#15
Khin Thuzar Win, Aung Zaw Oo, Sonoko Dorothea Bellingrath-Kimura
A pot experiment was conducted to study the effects of soil types and osmotic levels on growth and (137)Cs accumulation in two blackgram varieties differing in salinity tolerance grown in Fukushima contaminated soils. The contamination levels of the sandy clay loam and clay soil were 1084 and 2046 Bq kg(-1) DW, respectively. The (137)Cs activity was higher in both plants grown on the sandy clay loam than on the clay soil regardless of soil (137)Cs activity concentration. No significant differences were observed in all measured growth parameters between the two varieties under optimal water conditions for both types of soil...
January 19, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28102497/regulated-partitioning-of-fixed-carbon-14-c-sodium-na-potassium-k-and-glycine-betaine-determined-salinity-stress-tolerance-of-gamma-irradiated-pigeonpea-cajanus-cajan-l-millsp
#16
Pankaj Kumar, Vasundhara Sharma, Chobhe Kapil Atmaram, Bhupinder Singh
Soil salinity is a major constraint that limits legume productivity. Pigeonpea is a salt sensitive crop. Seed gamma irradiation at a very low dose (2.5 Gy) is known to enhance seedling establishment, plant growth and yield of cereals and other crops. The present study conducted using two genetically diverse varieties of pigeonpea viz., Pusa-991 and Pusa-992 aimed at establishing the role of pre-sowing seed gamma irradiation at 0, 0.0025, 0.005, 0.01, 0.02, 0.05 and 0.1 kGy on plant growth, seed yield and seed quality under salt stress at 0, 80 and 100 mM NaCl (soil solution EC equivalent 1...
January 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28097484/different-physiobiochemical-and-transcriptomic-reactions-of-rice-oryza-sativa-l-cultivars-differing-in-terms-of-salt-sensitivity-under-salinity-stress
#17
Mojtaba Kordrostami, Babak Rabiei, Hassan Hassani Kumleh
Salinity stress is the most important and common environmental stresses throughout the world, including Iran. The aim of this study was to investigate the expression of several important genes involved in the salinity tolerance of the rice cultivars differing in salt sensitivity. In this research, the expression of four mitochondrial genes, H2O2, malondialdehyde (MDA), proline, sodium, potassium and superoxide dismutase (SOD), was measured in Iranian rice cultivars and two well-known international varieties as checks in response to 100 mM salt stress...
January 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28069662/endoplasmic-reticulum-stress-inhibition-limits-the-progression-of-chronic-kidney-disease-in-the-dahl-salt-sensitive-rat
#18
Victoria Yum, Rachel E Carlisle, Chao Lu, Elise Brimble, Jasmine Chahal, Chandak Upagupta, Kjetil Ask, Jeffrey G Dickhout
Proteinuria is one of the primary risk factors for the progression of chronic kidney disease (CKD) and has been implicated in the induction of endoplasmic reticulum (ER) stress. We hypothesized that the suppression of ER stress with a low molecular weight chemical chaperone, 4-phenylbutyric acid (4-PBA), would reduce the severity of CKD and proteinuria in the Dahl salt-sensitive (SS) hypertensive rat. To induce hypertension and CKD, 12-wk-old male rats were placed on a high-salt (HS) diet for 4 wk with or without 4-PBA treatment...
January 1, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28067240/cd8-t-cells-stimulate-na-cl-co-transporter-ncc-in-distal-convoluted-tubules-leading-to-salt-sensitive-hypertension
#19
Yunmeng Liu, Tonya M Rafferty, Sung W Rhee, Jessica S Webber, Li Song, Benjamin Ko, Robert S Hoover, Beixiang He, Shengyu Mu
Recent studies suggest a role for T lymphocytes in hypertension. However, whether T cells contribute to renal sodium retention and salt-sensitive hypertension is unknown. Here we demonstrate that T cells infiltrate into the kidney of salt-sensitive hypertensive animals. In particular, CD8(+) T cells directly contact the distal convoluted tubule (DCT) in the kidneys of DOCA-salt mice and CD8(+) T cell-injected mice, leading to up-regulation of the Na-Cl co-transporter NCC, p-NCC and the development of salt-sensitive hypertension...
January 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28062568/renal-collectrin-protects-against-salt-sensitive-hypertension-and-is-downregulated-by-angiotensin-ii
#20
Pei-Lun Chu, Joseph C Gigliotti, Sylvia Cechova, Gabor Bodonyi-Kovacs, Fang Chan, Donna Lee Ralph, Nancy Howell, Kambiz Kalantari, Alexander L Klibanov, Robert M Carey, Alicia A McDonough, Thu H Le
Collectrin, encoded by the Tmem27 gene, is a transmembrane glycoprotein with approximately 50% homology with angiotensin converting enzyme 2, but without a catalytic domain. Collectrin is most abundantly expressed in the kidney proximal tubule and collecting duct epithelia, where it has an important role in amino acid transport. Collectrin is also expressed in endothelial cells throughout the vasculature, where it regulates L-arginine uptake. We previously reported that global deletion of collectrin leads to endothelial dysfunction, augmented salt sensitivity, and hypertension...
January 6, 2017: Journal of the American Society of Nephrology: JASN
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