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https://www.readbyqxmd.com/read/29351422/body-mass-specific-na-k-atpase-activity-in-the-medullary-thick-ascending-limb-implications-for-species-dependent-urine-concentrating-mechanisms
#1
Mun Aw, Tamara M Armstrong, C Michele Nawata, Sarah N Bodine, Jeeeun J Oh, Guojun Wei, Kristen K Evans, Mohammad Shahidullah, Timo Rieg, Thomas L Pannabecker
In general, mammalian whole body mass-specific metabolic rate correlates positively with maximal urine concentration (Umax) irrespective of whether or not the species have adapted to arid or mesic habitat. Accordingly, we hypothesized that the thick ascending limb (TAL) of a rodent with markedly higher whole body mass-specific metabolism than rat exhibits a substantially higher TAL metabolic rate as estimated by Na+, K+-ATPase activity and Na+, K+-ATPase α1 gene and protein expression. The kangaroo rat inner stripe of the outer medulla exhibits significantly higher mean Na+, K+-ATPase activity (~70%) compared to 2 rat strains (Sprague-Dawley and Munich-Wistar), extending prior studies showing rat activity exceeds rabbit...
January 3, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29351386/protective-effect-of-c-peptide-on-experimentally-induced-diabetic-nephropathy-and-the-possible-link-between-c-peptide-and-nitric-oxide
#2
Eman A Elbassuoni, Neven M Aziz, Nashwa F El-Tahawy
Diabetic nephropathy one of the major microvascular diabetic complications. Besides hyperglycemia, other factors contribute to the development of diabetic complications as the proinsulin connecting peptide, C-peptide. We described the role of C-peptide replacement therapy on experimentally induced diabetic nephropathy, and its potential mechanisms of action by studying the role of Nitric oxide (NO) as a mediator of C-peptide effects by in vivo modulating its production by NG-nitro-L-arginine methyl ester (L-NAME)...
January 19, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29351251/compatibility-with-panax-notoginseng-and-rehmannia-glutinosa-alleviates-the-hepatotoxicity-and-nephrotoxicity-of-tripterygium-wilfordii-via-modulating-the-pharmacokinetics-of-triptolide
#3
Qichun Zhang, Yiqun Li, Mengzhu Liu, Jinao Duan, Xueping Zhou, Huaxu Zhu
Tripterygium wilfordii (TW) and the representative active component triptolide show positive therapeutic effect on the autoimmune disorders and simultaneously ineluctable hepatotoxicity and nephrotoxicity. Combinational application of Panax notoginseng (PN) and Rehmannia glutinosa (RG) weakens the toxicity of TW according the clinical application of traditional Chinese medicine. This article was aimed at the mechanism of decreasing toxicity of TW by the combinational application of PN and RG. Biochemical and pathohistological analysis were utilized to assess the toxicity on liver and kidney in rats administrated with TW, TW-PN, TW-RG and TW-PN-RG for 3 and 7 days...
January 19, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29350718/energy-efficient-electrolytic-hydrogen-production-assisted-by-coupling-urea-oxidation-with-a-ph-gradient-concentration-cell
#4
Genxiang Wang, Junxiang Chen, Yan Li, Jingchun Jia, Pingwei Cai, Zhenhai Wen
An unprecedented asymmetric-electrolyte electrolyzer is proposed using an acidic cathode for the hydrogen evolution reaction (HER) and an alkaline anode for the urea oxidation reaction (UOR), which significantly decreases the electrical energy required for electrolytic hydrogen production.
January 19, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29350716/three-dimensional-multiscale-fiber-matrices-development-and-characterization-for-increased-hepg2-functional-maintenance-for-bio-artificial-liver-application
#5
Surendra Kumar Verma, Akshay Modi, Jayesh Bellare
The development of a cell-growth substrate that provides a nature-like microenvironment, promotes cell adhesion, and maintains the cells' functional activities is a research focus in the field of tissue engineering. In the present study, three-dimensional micro-nano multiscale fiber-based substrates were developed by depositing biocompatible polycaprolactone (PCL)/PCL-Chitosan (C)/PCL-C-Gelatin (G) electrospun nanofibers (NFs) on the outer surface of hollow fiber membranes (HFMs) in one step. A comparison study with regard to physico-chemical characterization, hemocompatibility, cytotoxicity, and cellular functionality was performed with the developed matrices...
January 19, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29350174/automated-peritoneal-dialysis-could-rapidly-improve-left-heart-failure-by-increasing-peritoneal-dialysis-ultrafiltration-a-single-center-observational-clinical-study%C3%A2
#6
Cong Yang, Jixing Liu, Nirong Gong, Yanhong Lin, Yanfang He, Zhixiu Yi, Liping Hu, Jianping Jiang, Jun Ai
Ultrafiltration failure (UFF) is a major cause of water retention, left heart failure (LHF), and peritoneal dialysis (PD) failure. Automated peritoneal dialysis (APD) might have better ultrafiltration (UF) than continuous ambulatory peritoneal dialysis (CAPD). Here, we have studied whether short-term APD could increase UF and improve LHF. 47 patients were included in this study from December 1, 2015, to January 1, 2017. All patients had been treated with CAPD before they came to our center and were treated with APD in the hospital...
January 19, 2018: Clinical Nephrology
https://www.readbyqxmd.com/read/29349553/differential-jnk-p38-and-erk-response-to-renal-injury-in-a-rat-model-of-acute-pancreatitis-in-pregnancy
#7
Fangchao Mei, Teng Zuo, Liang Zhao, Qiao Shi, Mingwei Xiang, Yupu Hong, Man Li, Weixing Wang
OBJECTIVE: The objective of this study was to determine the mechanism of acute renal injury (ARI) in acute necrotizing pancreatitis in late pregnancy (ANPIP). METHODS: Pregnant Sprague-Dawley rats in the third trimester were used for this study, and an ANPIP model was induced by injecting 5% sodium taurocholate into the biliary pancreatic duct. The rats were randomly divided into three groups: the normal, sham-operated (SO) and acute necrotizing pancreatitis (ANP) groups...
January 18, 2018: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29348807/discovery-of-spiro-oxazolidinediones-as-selective-orally-bioavailable-inhibitors-of-p300-cbp-histone-acetyltransferases
#8
Michael R Michaelides, Arthur Kluge, Michael Patane, John H Van Drie, Ce Wang, T Matthew Hansen, Roberto M Risi, Robert Mantei, Carmen Hertel, Kannan Karukurichi, Alexandre Nesterov, David McElligott, Peter de Vries, J William Langston, Philip A Cole, Ronen Marmorstein, Hong Liu, Loren Lasko, Kenneth D Bromberg, Albert Lai, Edward A Kesicki
p300 and its paralog CBP can acetylate histones and other proteins and have been implicated in a number of diseases characterized by aberrant gene activation, such as cancer. A novel, highly selective, orally bioavailable histone acetyltransferase (HAT) domain inhibitor has been identified through virtual ligand screening and subsequent optimization of a unique hydantoin screening hit. Conformational restraint in the form of a spirocyclization followed by substitution with a urea led to a significant improvement in potency...
January 11, 2018: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29345438/evaluation-of-hepatic-glycogen-content-some-haematological-and-biochemical-parameters-of-alloxan-induced-diabetic-rats-treated-with-combinations-of-glibenclamide-and-g-latifolium-extract
#9
Patrick E Aba
Background Diabetes is associated with both biochemical and haematological complications. Combination therapy has been advocated to mitigate some of these complications. Aim This study was designed to investigate the effects of glibenclamide and Gongronema latifolium (GL) on hepatic glycogen content and haemato-biochemical parameters. Methods Thirty male Wistar rats were assigned into five groups of six rats each. Groups 2-5 rats received intraperitoneally, 160 mg/kg of alloxan monohydrate while group 1 rats served as normal control...
May 4, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/29345423/deep-eutectic-solvent-aqueous-solutions-as-efficient-media-for-the-solubilization-of-hardwood-xylans
#10
Eduarda S Morais, Patrícia V Mendonça, Jorge F J Coelho, Mara G Freire, Carmen S R Freire, João A P Coutinho, Armando J D Silvestre
This work contributes to the development of integrated lignocellulosic-based biorefineries by the pioneering exploitation of hardwood xylans by solubilization and extraction in deep eutectic solvents (DES). DES formed by choline chloride and urea or acetic acid were initially evaluated as solvents for commercial xylan as a model compound. The effects of temperature, molar ratio, and concentration of the DES aqueous solutions were evaluated and optimized by using a response surface methodology. The results obtained demonstrated the potential of these solvents, with 328...
January 18, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29345406/helicobacter-pylori-infection-and-occurrence-of-celiac-disease-in-subjects-hla-dq2-dq8-positive-a-prospective-study
#11
Maria P Dore, Roberta Salis, Maria F Loria, Vincenzo Villanacci, Gabrio Bassotti, Giovanni M Pes
BACKGROUND: Celiac disease (CD) occurs in subjects positive for HLA-DQ2 and/or DQ8 gene loci at any age following ingestion of gluten-containing food. An increased permeability of the mucosa allows interactions between gliadin macromolecules and genetic factors. It has been observed that Helicobacter pylori has the ability to modulate the integrity of the duodenal epithelium. We aimed to determine whether H. pylori infection may enhance the occurrence of CD in genetically susceptible subjects...
January 18, 2018: Helicobacter
https://www.readbyqxmd.com/read/29345378/self-calibrating-mechanochromic-fluorescent-polymers-based-on-encapsulated-excimer-forming-dyes
#12
Céline Calvino, Anirvan Guha, Christoph Weder, Stephen Schrettl
While mechanochemical transduction principles are omnipresent in nature, mimicking these in artificial materials is challenging. The ability to reliably detect the exposure of man-made objects to mechanical forces is, however, of great interest for many applications, including structural health monitoring and tamper-proof packaging. A useful concept to achieve mechanochromic responses in polymers is the integration of microcapsules, which rupture upon deformation and release a payload causing a visually detectable response...
January 18, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29345244/in-vitro-physical-and-biological-characterization-of-biodegradable-elastic-polyurethane-containing-ferulic-acid-for-small-caliber-vascular-grafts
#13
Shiva Asadpour, Jafar Ai, Parivash Davoudi, Masoud Ghorbani, Marzieh Jalali, Hossein Ghanbari
Demand for small diameter vascular grafts is growing. Main limitations of these grafts include induced thrombotic events, lack of in-situ endothelialization, intimal hyperplasia and poor mechanical properties which impair the graft patency rate in long term applications. Most of the used antithrombotic modification methods usually conflict with formation of endothelial cell monolayer on the grafts. Here, we synthesized a novel biodegradable elastic poly (ester ether urethane urea) (PEEUU) using poly (ethylene glycol) (PEG) and poly (diethylene glycol adipate) (PDEGA) as soft segments...
January 18, 2018: Biomedical Materials
https://www.readbyqxmd.com/read/29345135/the-deposition-and-elimination-of-glucosinolates-metabolites-derived-from-rapeseed-meal-in-eggs-of-laying-hens
#14
Liping Zhu, Jianping Wang, Xuemei Ding, Shiping Bai, Qiufeng Zeng, Zhuowei Su, Yue Xuan, Keying Zhang
This study was to investigate the deposition and elimination of glucosinolates metabolites including 5-vinyl-1,3-oxazolidine-2-thione (5-VOT) and thiocyanate ion (SCN-) derived from rapeseed meal (RSM) in hen eggs. During 12 weeks accumulation phase, the serum triiodothyronine, thyronine, blood urea nitrogen, kidney index and thyroid index linearly increased with the RSM at week 12 (P < 0.05). The thyroid histopathology revealed a sign of hyperplastic goiter in hens fed with 17.64-29.40% RSM. The 5-VOT content of eggs (Y, ng/g) was correlated with 5-VOT intake (X2, µg/d...
January 18, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29344901/imaging-characteristics-and-first-experience-of-68ga-thp-psma-a-novel-probe-for-rapid-kit-based-ga-68-labeling-and-pet-imaging-comparative-analysis-with-68ga-psma-i-t
#15
Thorsten Derlin, Sebastian Schmuck, Cathleen Juhl, Steffi Teichert, Johanna Zörgiebel, Hans-Jürgen Wester, Sophie M Schneefeld, Almut C A Walte, James T Thackeray, Tobias L Ross, Frank M Bengel
PURPOSE: [68Ga]Trishydroxypyridinone (THP)-prostate-specific membrane antigen (PSMA) is a novel tracer that can be labeled in one step by cold reconstitution of a kit with unprocessed generator eluate, targeting PSMA via the lysine-urea-glutamate (KuE) motif. The aim of this study was to evaluate the human imaging characteristics of [68Ga]THP-PSMA. PROCEDURES: [68Ga]THP-PSMA positron emission tomography (PET)/x-ray computed tomography (CT) was performed in 25 patients with biochemical recurrence after radical prostatectomy for prostate cancer...
January 17, 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29344107/managing-hyponatremia-in-lung-cancer-latest-evidence-and-clinical-implications
#16
REVIEW
Ilaria Fiordoliva, Tania Meletani, Maria Giuditta Baleani, Silvia Rinaldi, Agnese Savini, Marzia Di Pietro Paolo, Rossana Berardi
Hyponatremia is the most common electrolyte disorder in lung cancer patients. This condition may be related to many causes including incidental medications, concurrent diseases and side effects of antineoplastic treatments or the disease itself. Although not frequently life-threatening, it is usually associated with prolonged hospitalization, delays in scheduled chemotherapy, worsening of patient performance status and quality of life and may also negatively affect treatment response and survival. Most of the available data focus on thoracic tumors, especially small-cell lung cancer (SCLC), where hyponatremia is frequently related to the syndrome of inappropriate secretion of antidiuretic hormone (SIADH)...
November 2017: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/29344027/plasma-volume-and-renal-function-predict-six-month-survival-after-hospitalization-for-acute-decompensated-heart-failure
#17
Kenneth C Bilchick, Nathaniel Chishinga, Alex M Parker, David X Zhuo, Mitchell H Rosner, LaVone A Smith, Hunter Mwansa, Jacob N Blackwell, Peter A McCullough, Sula Mazimba
Background: Plasma volume (PV) is contracted in stable patients with heart failure (HF) due to decongestion strategies. On the other hand, increased PV can adversely affect the trajectory of HF. We therefore examined the effects of increased percentage change in PV (%ΔPV), blood urea nitrogen (BUN), and %ΔPV stratified by BUN and glomerular filtration rate (GFR) on survival after discharge in patients hospitalized for acute decompensated HF (ADHF). Methods: We used the Strauss-Davis-Rosenbaum formula to calculate the %ΔPV between baseline and hospital discharge in a cohort from the Evaluation Study of Congestive Heart Failure and Pulmonary Artery Catheterization Effectiveness trial (ESCAPE)...
December 2017: Cardiorenal Medicine
https://www.readbyqxmd.com/read/29343451/biochemical-characterization-of-halophilic-alkalithermophilic-amylopullulanase-puld7-and-truncated-amylopullulanases-puld7%C3%AE-n-and-puld7%C3%AE-c
#18
Noha M Mesbah, Juergen Wiegel
A pullulanase, PulD7, was identified in the genome of the halophilic, alkalithermophilic isolate Alkalilimnicola sp. NM-DCM-1. PulD7 is 701 amino acids large with a carbohydrate binding module (CBM) 48 at the N-terminal. The full length PulD7 and N- and C-terminal truncated versions were cloned, heterologously expressed and functionally characterized. PulD7 displayed maximal activity at 55 °C, pH 9.5 and 2 M NaCl. PulD7 had good thermal stability, with a half-life of 693 min at 50 °C. PulD7 is an amylopullulanase, hydrolyzing both α‑1,4‑ and α‑1,6‑glycosidic bonds in soluble starch and pullulan, respectively...
January 14, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29343091/terminalia-chebula-supplementation-attenuates-cisplatin-induced-nephrotoxicity-in-wistar-rats-through-modulation-of-apoptotic-pathway
#19
Prerna Kalra, Ritu Karwasra, Yogendra Kumar Gupta, Subrata Basu Ray, Surender Singh
In the present study, we have evaluated the nephroprotective effect of hydroalcoholic extract of Terminalia chebula in cisplatin-induced nephrotoxicity model. Standardised extract was orally administered to Wistar rats for 10 days at different doses. On day 7, 8 mg/kg of cisplatin was administered intra-peritoneally to rats in all groups. T. chebula, in a dose-dependent manner significantly inhibited the elevation of serum creatinine, blood urea nitrogen and oxidant stress markers. The immunohistochemical analysis revealed the increased levels of apoptotic markers and cytokines in cisplatin group were significantly lowered by T...
January 17, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29343032/-incidence-and-short-term-outcomes-of-acute-kidney-injury-in-very-elderly-patients
#20
Q L Li, K Li, X D Wang, M Zhao
Objectives: To study the incidence, clinical characteristics, and prognostic impact of acute kidney injury (AKI) in very elderly patients. Methods: The very elderly patients (≥75 years) from the Geriatric Department of the Chinese PLA General Hospital between January 2007 and December 2015 were retrospectively enrolled. AKI was defined according to the 2012 Kidney Disease Improving Global Outcomes (KDIGO) criteria. AKI patients were divided into survivor group and non-survivor group by their outcomes within 90 days after AKI...
January 9, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
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