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https://www.readbyqxmd.com/read/28820397/long-term-feeding-with-bioactive-tripeptides-in-aged-hypertensive-and-normotensive-rats-special-focus-on-blood-pressure-and-bradykinin-induced-vascular-reactivity
#1
A Siltari, J Roivanen, R Korpela, H Vapaatalo
Bradykinin is the main player of the kallikrein-kinin system. Bradykinin-induced vasodilatation is age-dependent; this is believed to be associated with the level of expression of the two bradykinin receptors (BR1 and BR2) in the vasculature. The aim of this study was to clarify bradykinin-induced vascular reactivity of spontaneously hypertensive rats (SHR) and age-matched Wistar-Kyoto rats (WKY) after 6 weeks' consumption of a drink containing bioactive tripeptides (Ile-Pro-Pro, Val-Pro-Pro and Leu-Pro-Pro)...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28819188/highly-stabilized-core-satellite-gold-nanoassemblies-in-vivo-dna-directed-self-assembly-peg-modification-and-cell-imaging
#2
Liangfeng Tang, Guiping Yu, Lishan Tan, Min Li, Xiulong Deng, Jianyu Liu, Aiqing Li, Xuandi Lai, Jianqiang Hu
Au nanoparticles (NPs) have important applications in bioimaging, clinical diagnosis and even therapy due to its water-solubility, easy modification and drug-loaded capability, however, easy aggregation of Au NPs in normal saline and serum greatly limits its applications. In this work, highly stabilized core-satellite Au nanoassemblies (CSAuNAs) were constructed by a hierarchical DNA-directed self-assembly strategy, in which satellite Au NPs number could be effectively tuned through varying the ratios of core-AuNPs-ssDNA and satellite-AuNPs-ssDNAc...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815607/a-3d-tri-culture-system-reveals-that-activin-receptor-like-kinase-5-and-connective-tissue-growth-factor-drive-human-glomerulosclerosis
#3
John P Waters, Yvonne C Richards, Jeremy N Skepper, Mark Southwood, Paul D Upton, Nicholas W Morrell, Jordan S Pober, John R Bradley
Glomerular scarring, known as glomerulosclerosis, occurs in many chronic kidney diseases and involves interaction between glomerular endothelial cells (GEC), podocytes and mesangial cells (MCs), leading to signals that promote extracellular matrix deposition and endothelial cell dysfunction and loss. We describe a 3D tri-culture system to model human glomerulosclerosis. In 3D monoculture, each cell type alters its phenotype in response to TGFβ, which has been implicated as an important mediator of glomerulosclerosis...
August 16, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28813008/dietary-fructose-enhances-the-ability-of-low-concentrations-of-angiotensin-ii-to-stimulate-proximal-tubule-na%C3%A2-%C2%BA-reabsorption
#4
Agustin Gonzalez-Vicente, Pablo D Cabral, Nancy J Hong, Jessica Asirwatham, Nianxin Yang, Jessica M Berthiaume, Fernando P Dominici, Jeffrey L Garvin
Fructose-enriched diets cause salt-sensitive hypertension. Proximal tubules (PTs) reabsorb 70% of the water and salt filtered through the glomerulus. Angiotensin II (Ang II) regulates this process. Normally, dietary salt reduces Ang II allowing the kidney to excrete more salt, thereby preventing hypertension. We hypothesized that fructose-enriched diets enhance the ability of low concentrations of Ang II to stimulate PT transport. We measured the effects of a low concentration of Ang II (10(-12) mol/L) on transport-related oxygen consumption (QO₂), and Na/K-ATPase and Na/H-exchange (NHE) activities and expression in PTs from rats consuming tap water (Control) or 20% fructose (FRUC)...
August 16, 2017: Nutrients
https://www.readbyqxmd.com/read/28811684/lead-as-a-risk-factor-for-osteoporosis-in-post-menopausal-women
#5
REVIEW
Anjali Manocha, L M Srivastava, Seema Bhargava
Lead exposure is increasingly becoming an important risk factor for osteoporosis. In adults, approximately 80-90 % of absorbed lead is stored in the bones. These bone lead deposits are released into the blood during periods of enhanced bone resorption like menopause, forming a potential endogenous source of lead exposure. Postmenopausal women are at a higher risk for bone lead release because of hormonal and age related changes in bone metabolism. Estrogen deficiency is associated with increase in osteoclasts number and activity leading to both the early and late form of osteoporosis...
July 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28811672/an-evaluation-of-the-in-vivo-safety-of-nonporous-silica-nanoparticles-ocular-topical-administration-versus-oral-administration
#6
Martha Kim, Joo-Hee Park, Hyejoong Jeong, Jinkee Hong, Woo Sung Choi, Byung-Han Lee, Choul Yong Park
Nonporous silica nanoparticles (SiNPs) have potential as promising carriers for ophthalmic drugs. However, the in vivo safety of ocular topical SiNPs remains unclear. This study investigated the in vivo safety of oral and ocular topical applications of 100 nm-sized SiNPs in Sprague-Dawley rats. The rats were divided into the following four groups: low-dose oral administration (total 100 mg/kg of SiNPs mixed with food for one week), high-dose oral administration (total 1000 mg/kg of SiNPs mixed with food for one week), ocular topical administration (10 mg/ml concentration, one drop, applied to the right eyes four times a day for one month), or a negative control (no SiNP treatment)...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810844/effect-of-tolvaptan-on-renal-handling-of-water-and-sodium-gfr-and-central-hemodynamics-in-autosomal-dominant-polycystic-kidney-disease-during-inhibition-of-the-nitric-oxide-system-a-randomized-placebo-controlled-double-blind-crossover-study
#7
Safa Al Therwani, My Emma Sofie Malmberg, Jeppe Bakkestroem Rosenbaek, Jesper Noergaard Bech, Erling Bjerregaard Pedersen
BACKGROUND: Tolvaptan slows progression of autosomal dominant polycystic kidney disease (ADPKD) by antagonizing the vasopressin-cAMP axis. Nitric oxide (NO) stimulates natriuresis and diuresis, but its role is unknown during tolvaptan treatment in ADPKD. METHODS: Eighteen patients with ADPKD received tolvaptan 60 mg or placebo in a randomized, placebo-controlled, double blind, crossover study. L-NMMA (L-NG-monomethyl-arginine) was given as a bolus followed by continuous infusion during 60 min...
August 15, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28808392/antiurolithiatic-effect-of-sirupeelai-samoola-kudineer-a-polyherbal-siddha-decoction-on-ethylene-glycol-induced-renal-calculus-in-experimental-rats
#8
A Hannah Rachel Vasanthi, V Muthulakshmi, V Gayathri, R Manikandan, S Ananthi, Sarah Kuruvilla
BACKGROUND: Sirupeelai Samoola Kudineer (SK), a polyherbal decoction containing four medicinal plants has been used in Siddha system of medicine, practiced in Southern parts of India for the management of urolithiasis. OBJECTIVE: The present study is carried out to scientifically validate the traditional claim and to study the mechanism of action of the drug. MATERIALS AND METHODS: In the present study, anti-urolithiatic effect of SK was evaluated in Sprague-Dawley rats using ethylene glycol through drinking water and intraperitoneal injection of sodium oxalate...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28808020/kcne1-and-kcne3-modulate-kcnq1-channels-by-affecting-different-gating-transitions
#9
Rene Barro-Soria, Rosamary Ramentol, Sara I Liin, Marta E Perez, Robert S Kass, H Peter Larsson
KCNE β-subunits assemble with and modulate the properties of voltage-gated K(+) channels. In the heart, KCNE1 associates with the α-subunit KCNQ1 to generate the slowly activating, voltage-dependent potassium current (IKs) in the heart that controls the repolarization phase of cardiac action potentials. By contrast, in epithelial cells from the colon, stomach, and kidney, KCNE3 coassembles with KCNQ1 to form K(+) channels that are voltage-independent K(+) channels in the physiological voltage range and important for controlling water and salt secretion and absorption...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807851/toxic-pyrrolizidine-alkaloids-provide-a-warning-sign-to-overuse-of-the-ethnomedicine-arnebia-benthamii
#10
Latif Ahmad, He Yi, Jia-Chen Hao, Andrew Semotiuk, Quan-Ru Liu, Paras Mazari
ETHNOPHARMACOLOGICAL RELEVANCE: From early times man has used medicinal plants for the treatment of various ailments and basic health care needs. The use of herbal medicines has increased day by day and with this, so do reports of adverse events, poisoning, and suspected toxicity. Similarly, the indigenous communities of Neelum Valley in Azad Kashmir commonly use Arnebia benthamii (Wall. ex G.Don) I.M.Johnst. for medicinal purposes to treat various human aliments. Besides their medicinal uses, it also contains hepatotoxic pyrrolizidine alkaloids (PAs)...
August 11, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28806149/detection-of-nanophyetus-salmincola-in-water-snails-and-fish-tissues-by-quantitative-pcr
#11
Maureen K Purcell, Rachel L Powers, Bonnie L Besijn, Paul K Hershberger
We report the development and validation of two quantitative polymerase chain reaction (qPCR) assays to detect N. salmincola DNA in water samples and fish and snail tissues. Analytical and diagnostic validation demonstrated good sensitivity, specificity and repeatability of both qPCR assays. N. salmincola DNA copy number in kidney tissue was significantly correlated with metacercariae counts based on microscopy. Extraction methods were optimized for the sensitive qPCR detection of N. salmincola DNA in settled water samples...
August 14, 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28805266/hypothermic-pulsatile-preservation-of-kidneys-from-uncontrolled-deceased-donors-after-cardiac-arrest
#12
Xavier Matillon, Fabrice Danjou, Palmina Petruzzo, Olivier Thaunat, Thomas Rimmele, Claire Delsuc, Alexandre Faure, Maud Rabeyrin, Vannary Meas Yedid, William Hanf, Emmanuel Morelon, Lionel Badet, Ricardo Codas
Kidneys from uncontrolled donors after cardiac arrest (uDCD) suffer from a period of warm ischemia between cardiac arrest and cold flushing. Aim of the study was to evaluate renal outcomes of uDCD kidneys selected on the basis of renal Resistance Index (RI) and its influence on graft function and survival. The study included 44 kidneys procured from 26 uDCD starting 1.1.2006 until 31.12.2013. The donors (Maastricht category II) underwent cardiopulmonary resuscitation by assisted ventilation and chest compression; the organs were preserved with "in situ" cold perfusion or a normothermic regional perfusion...
August 14, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28798081/a-role-for-tight-junction-associated-marvel-proteins-in-larval-sea-lamprey-petromyzon-marinus-osmoregulation
#13
Dennis Kolosov, Phuong Bui, Andrew Donini, Mike P Wilkie, Scott P Kelly
This study reports on tight junction-associated MARVEL proteins of larval sea lamprey (Petromyzon marinus) and their potential role in ammocoete osmoregulation. Two Occludin isoforms (designated Ocln and Ocln-a) and a tricellulin (Tric) were identified. Transcripts encoding ocln, ocln-a, and tric were broadly expressed in larval lamprey, with greatest abundance of ocln in gut, liver and kidney, ocln-a in the gill and skin, and tric in the kidney. Ocln and Ocln-a resolved as ∼63 kDa and ∼35 kDa MW proteins respectively while Tric resolved as a ∼50 kDa protein...
August 10, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28797815/structure-of-a-pectic-polysaccharide-from-pseudostellaria-heterophylla-and-stimulating-insulin-secretion-of-ins-1-cell-and-distributing-in-rats-by-oral
#14
Jinlong Chen, Wensheng Pang, Yongjun Kan, Li Zhao, Zhaodong He, Wentao Shi, Bin Yan, Hong Chen, Juan Hu
A water-soluble, pectic polysaccharide named as 0.5MSC-F isolated from Pseudostellaria Heterophylla with a molecular weight of 4.8×10(4) Da that was composed of rhamnose, galactose, arabinose, and galacturonic acid which the major monosaccharide contents range up to 63.20%. Where the main chain was consists of 1,4-linked galacturonic acid and a small amount of 1,2-linked rhamnose was embedded into backbone to connect alternative galacturonic acid in the form of Rhamnogalacturonan I (RG-I) structure. 1, 5-linked arabinose through C-4 of 1, 2-linked rhamnose, another 1, 3 or 1,6-linked galactose through C-4 of 1, 2-linked rhamnose, was interconnected to branch chain...
August 7, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28797668/salinity-stress-enhancing-basal-and-induced-immune-responses-in-striped-catfish-pangasianodon-hypophthalmus-sauvage
#15
Mélodie Schmitz, Tamar Ziv, Arie Admon, Sébastien Baekelandt, Syaghalirwa N M Mandiki, Maëlenn L'Hoir, Patrick Kestemont
In the Mekong Delta, striped catfish are faced with chronic salinity stress related to saltwater intrusion induced by global climatic changes. In this study, striped catfish juveniles were submitted to a prolonged salinity stress (up to 10ppt) over three weeks followed by infection with a virulent bacterial strain, Edwardsiella ictaluri. Osmoregulatory parameters were investigated. In addition, a label free quantitative proteomics workflow was performed on kidneys. The workflow consisted of an initial global profiling of relative peptide abundances (by LC/MS, peak area quantification based on extracted ion currents), followed by identification (by MS/MS)...
August 7, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28796300/apelin-apj-system-a-novel-potential-therapy-target-for-kidney-disease
#16
REVIEW
Zhen Huang, Lele Wu, Linxi Chen
Apelin is an endogenous ligand of seven-transmembrane G protein-coupled receptor APJ. Apelin and APJ are distributed in various tissues, including the heart, lung, kidney, and even in tumor tissues. Studies show that apelin mRNA is highly expressed in the inner stripe of kidney outer medulla, which plays an important role in process of water and sodium balance. Additionally, more studies also indicate that apelin/APJ system exerts a broad range of activities in kidney. Therefore, we review the role of apelin/APJ system in kidney diseases such as renal fibrosis, renal ischemia/reperfusion injury, diabetic nephropathy, polycystic kidney disease and hemodialysis...
August 10, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28795025/sub-chronic-safety-evaluation-of-aqueous-extract-of-alangium-salvifolium-l-f-wangerin-leaves-in-rats
#17
Bhupinder Kapoor, Gagandeep Kaur, Mukta Gupta, Reena Gupta
Conventionally, the juice and extract of Alangium salvifolium leaves have been used for the treatment of diabetes, wound healing, dog bite, and as a poultice in rheumatism. To carry out the sub-chronic toxicity and thereafter safety evaluation of A. salvifolium leaves. The aqueous extract of A. salvifolium leaves was administered orally at the doses of 200, 400, and 800 mg/kg/day for 90 days. All the animals were observed daily for general behavior, changes in body weight, food, and water consumption. At the end of the treatment period, biochemical and hematological parameters were analyzed; and the animals were sacrificed for histopathological examination of heart, lungs, liver, and kidney...
July 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/28794292/cross-linked-polyelectrolyte-and-its-function-in-adsorption-of-fluid-and-excess-nitrogen-waste-products-an-experimental-study-on-dialysate-effluent-fluid
#18
Hamid Tayebi Khosroshahi, Behzad Abedi, Sabalan Daneshvar, Effat Alizadeh, Mohammadreza Khalilzadeh, Yaghoub Abedi
INTRODUCTION: One of the most important issues in patients with chronic kidney disease is fluid retention and volume overload accompanied by retention of nitrogenous waste products and some electrolytes. Bowel fluid contains high levels of urea, creatinine, uric acid, and electrolytes, which make it a potential candidate for intestinal excretion of nitrogen wastes and electrolytes. Cross-linked polyelectrolyte (CLP) is a polymer that, given orally, absorbs excess fluid, electrolyte, and nitrogenous waste products...
July 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/28780813/-delayed-effect-of-liver-injury-and-metabolism-of-dimethylformamide-after-high-exposures-in-rats
#19
Z J Wu, M Y Guan, M Zheng, M Zhang, W J Zhao, L J Shao, Y C Zhai, Y L Zhu, J Cheng
Objective: To investigate the delayed effect of liver injury and metabolism of dimethylformamide (DMF) after high exposures in rats. Methods: A total of 12 rats were randomly divided into four groups and 3 rats were in each group. Rats in 1d DMF+2 d delayed group were dosed for 1 day and rested for 2 days, and sacrificed at the 4th day. Rats in 3 d DMF group were dosed for 3 days and sacrificed at the 4th day. Rats in 3 d DMF+3 d delayed group were dosed for 3 days and rested for 3 days, and sacrificed at the 7th day...
June 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28780041/quinine-induced-thrombotic-microangiopathy-a-report-of%C3%A2-19%C3%A2-patients
#20
Evaren E Page, Dustin J Little, Sara K Vesely, James N George
BACKGROUND: Quinine can cause diverse and severe immune-mediated adverse reactions, including thrombotic microangiopathy (TMA). Our objective was to describe the presenting features and long-term outcomes of patients with quinine-induced TMA. STUDY DESIGN: A case series of 19 patients with quinine-induced TMA treated with plasma exchange. SETTING & PARTICIPANTS: Patients with quinine-induced TMA initially suspected of having thrombotic thrombocytopenic purpura (TTP) were identified among patients enrolled in the Oklahoma TTP-Hemolytic Uremic Syndrome Registry...
August 3, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
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