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Collecting duct

Sandra Schöniger, Hilke Gräfe, Franziska Richter, Heinz-Adolf Schoon
The enzyme indoleamine 2,3-dioxygenase 1 (IDO1) acts immunomodulatory and restricts bacterial growth. In the uterus of women and mice, it likely contributes to tissue homeostasis and disease pathogenesis. Pregnancy failure in mares is often caused by endometritis and endometrosis. The pathogenesis of nonsuppurative endometritis and endometrosis is still uncertain. To the authors' knowledge, no information on IDO1 expression in the equine endometrium is published. Aim of this study was to examine the presence of IDO1 as transcripts and proteins in the healthy and diseased endometrium of 25 mares and to determine its cellular expression...
March 5, 2018: Research in Veterinary Science
Kurt A Zimmerman, Cheng Jack Song, Nancy Gonzalez-Mize, Zhang Li, Bradley K Yoder
Hepatorenal fibrocystic disease (HRFCD) is characterized by cysts in the kidney and liver with associated fibrosis and is the result of defects in proteins required for cilia function or assembly. Previous reports indicate that macrophages, mainly M2-like macrophages, contribute to HRFCD, although the origin (yolk-sac derived resident macrophages vs bone-marrow derived infiltrating macrophages) and contribution of these cells to the observed phenotypes is unknown. Herein, we utilize a congenital model of cilia dysfunction (IFT88Orpk ) to study the importance of macrophages in HRFCD...
March 15, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
Sajida Qureshi, Shahriyar Ghazanfar, Mohammad Saeed Quraishy, Roshane Rana
OBJECTIVE: To compare clinically relevant pancreatic fistula rates in patients with stented versus non-stented pancreatico-jejunostomies. METHODS: The randomised comparative clinical trial was conducted at Civil Hospital, Karachi, from September 2009 to August 2015, and comprised patients presenting to the Surgical Unit 4 with a diagnosis of resectable periampullary carcinoma, carcinoma of head of pancreas, duodenal carcinoma involving the second part, and distal cholangiocarcinomas...
March 2018: JPMA. the Journal of the Pakistan Medical Association
Yuan-Yuan Ye, Jia-Wei Mei, Shan-Shan Xiang, Huai-Feng Li, Qiang Ma, Xiao-Ling Song, Zheng Wang, Yi-Chi Zhang, Yong-Chen Liu, Yun-Peng Jin, Yun-Ping Hu, Lin Jiang, Fa-Tao Liu, Yi-Jian Zhang, Ya-Juan Hao, Ying-Bin Liu
Gallbladder carcinoma (GBC), the most common malignant tumour of the bile duct, is highly aggressive and has a poor prognosis. MicroRNA-30a-5p (miR-30a-5p) is an important tumour suppressor that participates in many aspects of carcinogenesis and cancer development. However, the role of miR-30a-5p in GBC development remains to be determined, as do the mechanisms underlying its effects in GBC. Using samples collected from 42 subjects with gallbladder carcinoma (GBC), we showed decreased miR-30a-5p expression in the primary lesions vs...
March 14, 2018: Cell Death & Disease
Yuan Sheng Tao, Shang Guo Piao, Ying Shun Jin, Ji Zhe Jin, Hai Lan Zheng, Hai Yan Zhao, Sun Woo Lim, Chul Woo Yang, Can Li
BACKGROUND: Accumulating evidence suggests that a decrease in brain-derived neurotrophic factor (BDNF) level induces a variety of psychiatric and neurological disorders. However, the expression and role of BDNF in the kidney have not been explored. The present study examined the expression of BDNF and tropomyosin-related kinase (Trk) receptors in an experimental model of chronic cyclosporine A (CsA) nephropathy. METHODS: Sprague-Dawley rats on a salt-deplete diet were treated daily for four weeks with vehicle or CsA...
March 14, 2018: BMC Nephrology
José A Jiménez-Heffernan, Patricia Muñoz-Hernández, Alberto Canca Velasco, Alwalid Freih Fraih, Julián Cuesta, Pilar González-Peramato, Carlos Olivier-García, Blanca Vicandi
BACKGROUND: Differentiation between normal renal cellular structures and renal tumors can be a diagnostic challenge during fine needle aspiration. It is of particular relevance during percutaneous thermal ablation because of the small size of tumors and when performing rapid on-site evaluation. METHODS: A cyto-histological correlation study assisted by immunocytochemistry was performed. The study was based on 10 nephrectomy specimens. For the identification of proximal tubular cells we used CD10 and α-methylacyl coenzyme A racemase (AMACR)...
March 14, 2018: Diagnostic Cytopathology
Hongyan Yu, Esther Ern-Hwei Chan, Pravin Lingam, Jingwen Lee, Winston Wei Liang Woon, Jee Keem Low, Vishal G Shelat
Backgrounds/Aims: Previous studies have evaluated quality of life (QoL) in patients who underwent laparoscopic cholecystectomy (LC) for cholelithiasis. The purpose of this study was to evaluate QoL after index admission LC in patients diagnosed with acute cholecystitis (AC) using the Gastrointestinal Quality of Life Index (GIQLI) questionnaire. Methods: Patients ≥21 years admitted to Tan Tock Seng Hospital, Singapore for AC and who underwent index admission LC between February 2015 and January 2016 were evaluated using the GIQLI questionnaire preoperatively and 30 days postoperatively...
February 2018: Annals of Hepato-Biliary-Pancreatic Surgery
Jennifer M Kolb, Pamela Argiriadi, Karen Lee, Xiaoyu Liu, Emilia Bagiella, Aimee L Lucas, Michelle Kang Kim, Nikhil A Kumta, Satish Nagula, Umut Sarpel, Christopher J DiMaio
BACKGROUND & AIMS: For patients with branch duct intraductal papillary mucinous neoplasms (BD-IPMNs, cysts), it is a challenge to identify those at high risk for malignant lesions. We sought to identify factors associated with development of pancreatic cancer, focusing on neoplasm growth rate. METHODS: We performed a retrospective study of 189 patients with BD-IPMNs who underwent at least 2 contrast-enhanced cross-sectional imaging studies, 1 year or more apart, at a tertiary referral center from January 2003 through 2013...
March 10, 2018: Clinical Gastroenterology and Hepatology
Søren Brandt Poulsen, Kavee Limbutara, Robert Andrew Fenton, Trairak Pisitkun, Birgitte M Christensen
The renal aldosterone-sensitive distal tubule (ASDT) is crucial for sodium reabsorption and blood pressure regulation. The ASDT consists of the late distal convoluted tubule (DCT2), connecting tubule (CNT) and collecting duct. Due to difficulties in isolating epithelial cells from the ASDT in large quantities, few transcriptome studies have been performed on this segment. Moreover, no studies exist on isolated DCT2 and CNT cells (excluding intercalated cells), and the role of aldosterone for regulating the transcriptome of these specific cell types is largely unknown...
March 9, 2018: Physiological Genomics
Satyanarayan T Shanbhag, Bernard Choong, Maxim Petrov, Brett Delahunt, John A Windsor, Anthony R J Phillips
BACKGROUND: Critical illness including severe acute pancreatitis is associated with the multiple organ dysfunction syndrome. The "gut-lymph" hypothesis states that multiple organ dysfunction syndrome is due to release of toxic factors from the intestine into the mesenteric lymph. The aims of this study were to determine the effect of normotensive acute pancreatitis conditioned mesenteric lymph on cardiac function and whether external drainage of mesenteric lymph would protect the heart...
March 5, 2018: Surgery
Jack Braha, Scott Tenner
Pseudocysts evolve from fluid collections and/or disruptions of the pancreatic duct. They may occur secondary to acute pancreatitis, pancreatic trauma, or chronic pancreatitis. Lacking the clinical information, radiologists may inappropriately call a fluid collection or any cystic lesion a pseudocyst. With no clear history of acute pancreatitis or chronic pancreatitis, this is rare. Complications include infection, intracystic hemorrhage, or rupture. Pseudocysts can become painful, especially with chronic pancreatitis, and can cause early satiety and weight loss when their size affects the stomach and bowel...
April 2018: Gastrointestinal Endoscopy Clinics of North America
Daniel Gilsdorf, Jake Henrichsen, Katie Liljestrand, Allison Staheli, Griffin Olsen, Prem Narayanan, Mark Ott, David S Morris, Raymond Price
BACKGROUND: The ideal management of common bile duct (CBD) stones remains controversial, whether with single-stage management using laparoscopic CBD exploration (LCBDE) during laparoscopic cholecystectomy, or with two-stage management using preoperative or postoperative endoscopic retrograde cholangiopancreatography (ERCP). We wished to elucidate the practice patterns within our health system, which includes both large urban referral centers and small rural critical access hospitals. STUDY DESIGN: Retrospective data analysis from our 22-hospital, not-for-profit, integrated healthcare system...
March 5, 2018: Journal of the American College of Surgeons
Ao Li, Yuchen Xu, Song Fan, Jialin Meng, Xufeng Shen, Qian Xiao, Yuan Li, Li Zhang, Xiansheng Zhang, Guanqing Wu, Chaozhao Liang, Dianqing Wu
Autosomal dominant polycystic kidney disease (ADPKD) can be caused by mutations in the PKD1 or PKD2 genes. The PKD1 gene product is a Wnt cell-surface receptor. We previously showed that a lack of the PKD2 gene product, PC2, increases β-catenin signaling in mouse embryonic fibroblasts, kidney renal epithelia, and isolated renal collecting duct cells. However, it remains unclear whether β-catenin signaling plays a role in polycystic kidney disease phenotypes or if a Wnt inhibitor can halt cyst formation in ADPKD disease models...
March 8, 2018: JCI Insight
Omar Toumi, Mohamed Ali Chaouch, Abdesslem Ghedira, Ibtissem Korbi, Mohamed Nasr, Faouzi Noomene, Khadija Zouari, Randa Salem, Badii Hamida, Mondher Golli
INTRODUCTION: Congenital bile duct cysts (CBDC) is a rare congenital malformation. It results from an anomaly of the biliopancreatic junction (AJBP). This condition is often diagnosed at a young age. Although, it can be asymptomatic and discovered only at an advanced age. The aim of our work was to describe the diagnosis, therapeutic and evolutionary aspects of BVCD through a series of 11 cases diagnosed in adult cases. METHODS: This is a descriptive, retrospective and monocentric study...
June 2017: La Tunisie Médicale
Karina Miura Costa, Amulya Kumar Saxena
BACKGROUND: Postoperative chylothorax occurs due to trauma to lymphatic vessels and can occur after any thoracic procedure. This study reviewed recent literature to evaluate the management and outcomes of surgical chylothorax in neonates. METHODS: PubMed database was searched for articles in English, Portuguese and Spanish from 2000 to 2016. Data were collected for surgery, chylothorax management, complications, mortality and length of hospital stay (LOS). RESULTS: Twenty studies offered 107 neonates: congenital diaphragmatic hernia (CDH) (n = 76, 71%), cardiac malformations (n = 25, 23...
March 5, 2018: World Journal of Pediatrics: WJP
Rong Liu, Guo-Dong Zhao, Wen-Bo Tang, Ke-di Zhang, Zhi-Ming Zhao, Yuan-Xing Gao, Ming-Gen Hu, Cheng-Gang Li, Xiang-Long Tan, Xuan Zhang
OBJECTIVE: To assess the safety and advantages of robotic pancreatic surgery (RPS) based on the single-team experience with 1010 cases. METHODS: The clinical data of 1010 cases of RPS performed by a single team from November, 2011 to September, 2017 in our hospital were collected prospectively and analyzed. In most of cases the surgeries were performed using the third-generation da Vinci robotic surgical system. RESULTS: The 1010 cases receiving RPS included 417 cases of robotic pancreatoduodenectomy (RPD), 428 cases of robotic distal pancreatectomy, 60 cases of robotic central pancreatectomy, 53 cases of robotic pancreatic tumor enucleation, 3 cases of Appleby procedure, and 49 cases of other operations (including 4 cases of innovative robotic retroperitoneal laparoscopic surgery, 4 cases of robotic pancreatic tumor enucleation combined with main pancreatic duct bridging repair, 1 case of single incision robotic pancreatic tumor enucleation, and 2 cases of robotic central pancreatectomy combined with end-to-end anastomosis reconstruction)...
February 20, 2018: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
C M McQueen, E E Schmitt, T R Sarkar, J Elswood, R P Metz, D Earnest, M Rijnkels, W W Porter
The molecular clock plays key roles in daily physiological functions, development, and cancer. Period 2 (PER2) is a repressive element, which inhibits transcription activated by positive clock elements, resulting in diurnal cycling of genes. However, there are gaps in our understanding of the role of the clock in normal development outside of its time keeping function. Here we show that PER2 has a non-circadian function that is critical to mammary gland development. Virgin Per2 deficient mice, Per2 -/- , have underdeveloped glands containing fewer bifurcations and terminal ducts...
February 28, 2018: Development
Nicholas Chua, Konrad Wolfe, Sampi Mehta, Richard N Lodge, Sidath H Liyanage
We describe a rare case of renal lymphangioma presenting as a focal unilateral multicystic renal mass and document the first reported use of triparametric ultrasound (B-mode, Doppler, and contrast-enhanced ultrasound) in its diagnosis and discrimination from other focal multicystic lesions. Renal lymphangiomas are rare, benign, typically developmental lesions composed of cystic dilatation of the lymphatic ducts, usually occurring bilaterally as perinephric collections or parapelvic cysts mimicking hydronephrosis...
December 2017: Radiology case reports
Autumn N Harris, P Richard Grimm, Hyun-Wook Lee, Eric Delpire, Lijuan Fang, Jill W Verlander, Paul A Welling, I David Weiner
Background Hyperkalemia in association with metabolic acidosis that are out of proportion to changes in glomerular filtration rate defines type 4 renal tubular acidosis (RTA), the most common RTA observed, but the molecular mechanisms underlying the associated metabolic acidosis are incompletely understood. We sought to determine whether hyperkalemia directly causes metabolic acidosis and, if so, the mechanisms through which this occurs. Methods We studied a genetic model of hyperkalemia that results from early distal convoluted tubule (DCT)-specific overexpression of constitutively active Ste20/SPS1-related proline-alanine-rich kinase (DCT-CA-SPAK)...
February 26, 2018: Journal of the American Society of Nephrology: JASN
Hyun-Wook Lee, Gunars Osis, Autumn N Harris, Lijuan Fang, Michael F Romero, Mary E Handlogten, Jill W Verlander, I David Weiner
Renal ammonia metabolism is the primary mechanism through which the kidneys maintain acid-base homeostasis, but the molecular mechanisms regulating renal ammonia generation are unclear. In these studies, we evaluated the role of the proximal tubule basolateral plasma membrane electrogenic sodium bicarbonate cotransporter 1 variant A (NBCe1-A) in this process. Deletion of the NBCe1-A gene caused severe spontaneous metabolic acidosis in mice. Despite this metabolic acidosis, which normally causes a dramatic increase in ammonia excretion, absolute urinary ammonia concentration was unaltered...
February 26, 2018: Journal of the American Society of Nephrology: JASN
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