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Collecting duct

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https://www.readbyqxmd.com/read/28533091/na-h-exchange-regulatory-factor-1-is-required-for-romk1-k-channel-expression-in-the-surface-membrane-of-cultured-m-1-cortical-collecting-duct-cells
#1
Takashi Suzuki, Kazuyoshi Nakamura, Taira Mayanagi, Kenji Sobue, Manabu Kubokawa
The ROMK1 K(+) channel, a member of the ROMK channel family, is the major candidate for the K(+) secretion pathway in the renal cortical collecting duct (CCD). ROMK1 possesses a PDZ domain-binding motif at its C-terminus that is considered a modulator of ROMK1 expression via interaction with Na(+)/H(+) exchange regulatory factor (NHERF) 1 and NHERF2 scaffold protein. Although NHERF1 is a potential binding partner of the ROMK1 K(+) channel, the interaction between NHERF1 and K(+) channel activity remains unclear...
May 19, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28528853/sarcomatoid-renal-cell-carcinoma-and-collecting-duct-carcinoma-discrimination-from-common-renal-cell-carcinoma-subtypes-and-benign-rcc-mimics-on-multiphasic-mdct
#2
Jonathan R Young, Jocelyn A Young, Daniel J A Margolis, Steven Sauk, James Sayre, Allan J Pantuck, Steven S Raman
RATIONALE AND OBJECTIVES: To investigate whether imaging features on multiphasic multidetector computed tomography (MDCT) can help discriminate sarcomatoid renal cell carcinoma (RCC) and collecting duct carcinoma (CDC) from other solid renal masses. MATERIALS AND METHODS: With institutional review board approval for this HIPAA-compliant study, we derived a cohort of 7 sarcomatoid RCCs, 4 CDCs, 165 clear cell RCCs, 56 papillary RCCs, 22 chromophobe RCCs, 49 oncocytomas, and 16 lipid-poor angiomyolipomas with preoperative multiphasic MDCT with up to four phases (unenhanced, corticomedullary, nephrographic, and excretory)...
May 18, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28522687/integrin-linked-kinase-signaling-promotes-cyst-growth-and-fibrosis-in-polycystic-kidney-disease
#3
Archana Raman, Gail A Reif, Yuqiao Dai, Aditi Khanna, Xiaogang Li, Lindsay Astleford, Stephen C Parnell, James P Calvet, Darren P Wallace
Autosomal dominant polycystic kidney disease (ADPKD) is characterized by innumerous fluid-filled cysts and progressive deterioration of renal function. Previously, we showed that periostin, a matricellular protein involved in tissue repair, is markedly overexpressed by cyst epithelial cells. Periostin promotes cell proliferation, cyst growth, interstitial fibrosis, and the decline in renal function in PKD mice. Here, we investigated the regulation of these processes by the integrin-linked kinase (ILK), a scaffold protein that links the extracellular matrix to the actin cytoskeleton and is stimulated by periostin...
May 18, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28521286/duct-to-mucosa-versus-invagination-pancreaticojejunostomy-after-pancreaticoduodenectomy-a-meta-analysis
#4
Shuisheng Zhang, Zhongmin Lan, Jianwei Zhang, Yingtai Chen, Quan Xu, Qinglong Jiang, Yajie Zhao, Chengfeng Wang, Xiaoning Bi, Xiaozhun Huang
OBJECTIVE: We aimed to compare the two most commonly used pancreatico-jejunostomy reconstruction techniques-duct-to-mucosa and invagination. METHODS: Databases, including MEDLINE, EMBASE, Cochrane Library, and several clinical trial registration centers were searched. Randomized controlled trials that compared duct-to-mucosa and invagination pancreaticojejunostomy techniques after pancreaticoduodenectomy were included and analyzed. RESULTS: In total, seven RCTs were included, involving 850 patients...
April 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28515175/role-for-reactive-oxygen-species-in-flow-stimulated-inner-medullary-collecting-duct-endothelin-1-production
#5
Will Wheatley, Donald E Kohan
Inner medullary collecting duct (IMCD)-derived endothelin-1 (ET-1) is stimulated by volume expansion, in part through augmented luminal flow, whereupon it can elicit natriuresis and diuresis. Since flow can alter nitric oxide (NO) and reactive oxygen species (ROS), both of which can affect collecting duct salt transport, we asked whether NO and/or ROS mediate flow-stimulated IMCD ET-1. Mouse IMCD3 cells were exposed to flow and ET-1/GAPDH mRNA assessed. A shear stress of 10 dyne/cm2 for 1 hr increased ET-1 mRNA by 4-fold compared to no flow (ET-1 flow response)...
May 17, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28509726/sodium-butyrate-suppresses-angiotensin-ii-induced-hypertension-by-inhibition-of-renal-pro-renin-receptor-and-intrarenal-renin-angiotensin-system
#6
Lei Wang, Qing Zhu, Aihua Lu, Xiaofen Liu, Linlin Zhang, Chuanming Xu, Xiyang Liu, Haobo Li, Tianxin Yang
OBJECTIVES: Butyrate, a short-chain fatty acid, is the end product of the fermentation of complex carbohydrates by the gut microbiota. Recently, sodium butyrate (NaBu) has been found to play a protective role in a number of chronic diseases. However, it is still unclear whether NaBu has a therapeutic potential in hypertension. The present study was aimed to investigate the role of NaBu in angiotensin II (Ang II)-induced hypertension and to further explore the underlying mechanism. METHODS: Ang II was infused into uninephrectomized Sprague-Dawley rats with or without intramedullary infusion of NaBu for 14 days...
May 13, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28508198/role-of-the-low-selective-organic-anion-transport-in-regulation-of-osmotic-balance-of-renal-collecting-duct-principal-cells-under-hypo-osmotic-conditions
#7
G S Baturina, L E Katkova, E I Solenov, L N Ivanova
In the course of adaptation of the rat kidney collecting duct cells to hypo-osmotic medium, the organic anion transporter inhibitor probenecid reduced significantly the regulatory cell volume decrease in response to a hypotonic shock. Both probenecid and hypotonic shock delayed significantly the entry into a cell of the fluorescent dye calcein, which exists as anion at neutral pH. Thus, the organic osmolyte transport plays an important role in the regulatory decrease of the principal cell volume under the hypo-osmotic conditions...
March 2017: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28507753/yield-of-magnetic-resonance-cholangiopancreatography-for-the-investigation-of-bile-duct-dilatation-in-asymptomatic-patients
#8
Shlomit Tamir, Marius Braun, Assaf Issachar, Gil N Bachar, Ofer Benjaminov
BACKGROUND: Biliary dilatation in the asymptomatic patient is a frequent incidental finding in the work-up for which there are no current guidelines. OBJECTIVES: The purpose of this study was to determine the yield of magnetic resonance cholangiopancreatography (MRCP) in asymptomatic patients with an incidental finding of biliary duct dilatation. METHODS: The study included 68 consecutive patients for evaluation of biliary duct dilatation found incidentally on computed tomography (CT) or ultrasound (US)...
April 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28507058/hepatocyte-nuclear-factor-1%C3%AE-regulates-urinary-concentration-and-response-to-hypertonicity
#9
Karam Aboudehen, Lama Noureddine, Patricia Cobo-Stark, Svetlana Avdulov, Shayan Farahani, Micah D Gearhart, Daniel G Bichet, Marco Pontoglio, Vishal Patel, Peter Igarashi
The transcription factor hepatocyte nuclear factor-1β (HNF-1β) is essential for normal kidney development and function. Inactivation of HNF-1β in mouse kidney tubules leads to early-onset cyst formation and postnatal lethality. Here, we used Pkhd1/Cre mice to delete HNF-1β specifically in renal collecting ducts (CDs). CD-specific HNF-1β mutant mice survived long term and developed slowly progressive cystic kidney disease, renal fibrosis, and hydronephrosis. Compared with wild-type littermates, HNF-1β mutant mice exhibited polyuria and polydipsia...
May 15, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28495554/collecting-duct-carcinoma-of-the-kidney-disease-characteristics-and-treatment-outcomes-from-the-national-cancer-database
#10
Wilson Sui, Justin T Matulay, Dennis J Robins, Maxwell B James, Ifeanyi C Onyeji, Arindam RoyChoudhury, Sven Wenske, Guarionex Joel DeCastro
OBJECTIVE: To use a large population-level database to assess survival outcomes for collecting duct renal cell carcinoma (CDRCC). MATERIALS AND METHODS: The National Cancer Database was queried for all cases of CDRCC and clear cell renal cell carcinoma (CCRCC) from 2004 to 2013. After removing patients with other cancer diagnoses, the analytic cohort was composed of 201,686 CCRCC and 577 CDRCC cases. Kaplan-Meier and cox proportional hazards analysis were employed to model survival...
May 8, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28495544/modeling-glucose-metabolism-and-lactate-production-in-the-kidney
#11
Ying Chen, Brendan C Fry, Anita T Layton
The metabolism of glucose provides most of the ATP required for energy-dependent transport processes. In the inner medulla of the mammalian kidney, limited blood flow and O2 supply yield low oxygen tension; therefore, a substantial fraction of the glucose metabolism in that region is anaerobic. Lactate is considered to be a waste product of anaerobic glycolysis, which yields two lactate molecules for each glucose molecule consumed, thereby likely leading to the production and accumulation of a significant amount of lactate in the inner medulla...
May 8, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/28489662/metastasis-of-a-renal-collecting-duct-adenocarcinoma-to-the-oral-cavity-after-tooth-extraction
#12
Suna Erkilic, Aydin Keskinruzgar, Zehra Bozdag, Omer Gunhan
Metastatic tumors rarely occur in the oral cavity. The most common of the oral metastases are lung cancers in males, and breast and genital cancers in females. The most common primary tumor metastasis to the oral cavity is from the lung, kidney, liver, prostate, and colorectal cancers. The metastatic lesions are similar to oral lesions such as pyogenic granuloma, giant cell lesions, gingival polyps, hemangioma, peripheral fibroma, and adenoid squamous cell carcinoma. Therefore, the diagnosis of primary tumors is challenging...
May 9, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28488091/outcomes-of-endoscopic-retrograde-cholangiopancreatography-ercp-and-sphincterotomy-for-suspected-sphincter-of-oddi-dysfunction-sod-post-roux-en-y-gastric-bypass
#13
Chin Hong Lim, Cyrus Jahansouz, Martin L Freeman, Daniel B Leslie, Sayeed Ikramuddin, Stuart K Amateau
BACKGROUND: Sphincter of Oddi dysfunction (SOD) is thought to be a cause of chronic abdominal pain post Roux-en-Y gastric bypass, and current practice of performing endoscopic retrograde cholangiopancreatography (ERCP) with or without sphincterotomy is not supported by evidence. In addition to the complexity and risks of the procedure in patients with Roux-en-Y anatomy, the outcomes are uncertain and debatable. We performed a retrospective review and analysis of post-gastric bypass patients who had undergone ERCP with sphincterotomy to determine the effectiveness in patients with suspected SOD...
May 9, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28486425/the-structure-and-nephroprotective-activity-of-oligo-porphyran-on-glycerol-induced-acute-renal-failure-in-rats
#14
Jing Wang, Yun Hou, Delin Duan, Quanbin Zhang
Porphyran is a sulfate galactan in the cell wall of Porphyra. Its acid hydrolysis product, oligo-porphyran (OP), was prepared and the structure studied by electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS). This oligosaccharide was mainly composed of monosulfate-oligo-galactan, disufate-oligo-galactan, trisulfate-oligo-galactan, trisulfate oligo-methyl-galactan, and 3,6-anhydrogalactose with the degree of polymerization ranging from 1 to 8. The effects of OP were investigated in the glycerol-induced acute renal failure (ARF) model...
May 9, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28485735/the-mechanism-of-eccrine-sweat-pore-plugging-by-aluminium-salts-using-microfluidics-combined-with-small-angle-x-ray-scattering
#15
Alice Bretagne, Franck Cotot, Mireille Arnaud-Roux, Michael Sztucki, Bernard Cabane, Jean-Baptiste Galey
Aluminium salts are widely used to control sweating for personal hygiene purposes. Their mechanism of action as antiperspirants was previously thought to be a superficial plugging of eccrine sweat pores by the aluminium hydroxide gel. Here we present a microfluidic T junction device that mimics sweat ducts, and is designed for the real time study of interactions between sweat and ACH (Aluminium Chloro Hydrate) under conditions that lead to plug formation. We used this device to image and measure the diffusion of aluminium polycationic species in sweat counter flow...
May 24, 2017: Soft Matter
https://www.readbyqxmd.com/read/28483640/characterization-of-constitutive-and-acid-induced-outwardly-rectifying-chloride-currents-in-immortalized-mouse-distal-tubular-cells
#16
William C Valinsky, Rhian M Touyz, Alvin Shrier
Thiazides block Na(+) reabsorption while enhancing Ca(2+) reabsorption in the kidney. As previously demonstrated in immortalized mouse DCT (MDCT) cells, chlorothiazide application induced a robust plasma membrane hyperpolarization, which increased Ca(2+) uptake. This essential thiazide-induced hyperpolarization was prevented by the Cl(-) channel inhibitor 5-Nitro-2-(3-phenylpropylamino) benzoic acid (NPPB), implicating NPPB-sensitive Cl(-) channels, however the nature of these Cl(-) channels has been rarely described in the literature...
May 5, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28479376/extracellular-vesicles-in-bile-as-markers-of-malignant-biliary-stenoses
#17
Valeria Severino, Jean-Marc Dumonceau, Myriam Delhaye, Solange Moll, Isabelle Annessi-Ramseyer, Xavier Robin, Jean-Louis Frossard, Annarita Farina
BACKGROUND & AIMS: Algorithms for diagnosis of malignant common bile duct (CBD) stenoses are complex and lack accuracy. Malignant tumors secrete large numbers of extracellular vesicles (EVs) into surrounding fluids; EVs might therefore serve as biomarkers for diagnosis. We investigated whether concentrations of EVs in bile could discriminate malignant from nonmalignant CBD stenoses. METHODS: We collected bile and blood samples from 50 patients undergoing therapeutic endoscopic retrograde cholangiopancreatography at university hospitals in Europe for CBD stenosis of malignant (pancreatic cancer, n=20 or cholangiocarcinoma, n=5) or nonmalignant (chronic pancreatitis [CP], n=15) origin...
May 4, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28479086/hydraulic-separation-of-plastic-wastes-analysis-of-liquid-solid-interaction
#18
Monica Moroni, Emanuela Lupo, Floriana La Marca
The separation of plastic wastes in mechanical recycling plants is the process that ensures high-quality secondary raw materials. An innovative device employing a wet technology for particle separation is presented in this work. Due to the combination of the characteristic flow pattern developing within the apparatus and density, shape and size differences among two or more polymers, it allows their separation into two products, one collected within the instrument and the other one expelled through its outlet ducts...
May 4, 2017: Waste Management
https://www.readbyqxmd.com/read/28476004/pcdd-f-emissions-during-startup-and-shutdown-of-a-hazardous-waste-incinerator
#19
Min Li, Chao Wang, Kefa Cen, Mingjiang Ni, Xiaodong Li
Compared with municipal solid waste incineration, studies on the PCDD/F emissions of hazardous waste incineration (HWI) under transient conditions are rather few. This study investigates the PCDD/F emission level, congener profile and removal efficiency recorded during startup and shutdown by collecting flue gas samples at the bag filter inlet and outlet and at the stack. The PCDD/F concentration measured in the stack gas during startup and shutdown were 0.56-4.16 ng I-TEQ Nm(-3) and 1.09-3.36 ng I-TEQ Nm(-3), respectively, far exceeding the present codes in China...
April 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28474177/evaluation-of-biliary-ductal-anatomy-in-potential-living-liver-donors-comparison-between-mrcp-and-gd-eob-dtpa-enhanced-mri
#20
D Santosh, A Goel, I W Birchall, A Kumar, K H Lee, V H Patel, G Low
PURPOSE: To compare magnetic resonance cholangiopancreatography (MRCP) and Gd-EOB-DTPA-enhanced MRI in the evaluation of the biliary anatomy in potential living liver donors (LLDs). METHODS: A retrospective study was conducted in a tertiary care liver transplant center after obtaining ethics and institutional approvals. A total of 42 potential LLD MRI examinations were performed between November 2013 and March 2016. All patients underwent a standard MRI protocol which included MRCP and Gd-EOB-DTPA-enhanced MRI sequences in a single session...
May 4, 2017: Abdominal Radiology
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