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Collecting duct

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https://www.readbyqxmd.com/read/28913995/intraoperatively-observed-lacrimal-obstructive-features-and-surgical-outcomes-in-external-dacryocystorhinostomy
#1
Min Joung Lee, Sang In Khwarg, In Hyuk Kim, Jeong Hoon Choi, Youn Joo Choi, Namju Kim, Ho Kyung Choung
PURPOSE: To analyze the features of lacrimal drainage system obstruction confirmed during external dacryocystorhinostomy surgeries and report the surgical outcomes. METHODS: We reviewed the medical records of a total of 769 cases who underwent external dacryocystorhinostomy for primary lacrimal drainage obstruction between 2005 and 2014. Data about detailed location and extent of obstruction were collected intraoperatively. The sites of obstruction were classified into nasolacrimal duct obstruction (NLDO), common canalicular obstruction (CCO), and canalicular obstruction...
August 18, 2017: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/28912914/intraductal-ultrasonography-as-a-local-assessment-before-magnetic-compression-anastomosis-for-obstructed-choledochojejunostomy
#2
Hideaki Kawabata, Misuzu Hitomi, Naonori Inoue, Yukino Kawakatsu, Yuji Okazaki, Masatoshi Miyata
Magnetic compression anastomosis (MCA) has been developed as a non-surgical alternative treatment for biliary obstruction without serious complications. A 70-year-old woman who had undergone pancreaticoduodenectomy with modified Child reconstruction for pancreatic head cancer suffered from obstructed choledochojejunostomy with no recurrent findings 4 months after the operation. Cholangiography using the percutaneous transhepatic cholangiographic drainage (PTCD) and fluoroscopy revealed complete obstruction of the upper common bile duct, and the length of the obstruction was 7 mm...
August 2017: Gastroenterology Research
https://www.readbyqxmd.com/read/28904694/-bellini-duct-carcinoma-a-new-case-study-and-literature-review
#3
Abdessamad El Bahri, Jaouad Chafiki, Nabil Louardi, Omar Jendouzi, Abdellatif Janane, Ahmed Ameur, Mohammed Abbar
Bellini duct carcinoma is a very rare type of renal cell carcinoma (RCC), accounting for less than 1%. It arises from the distal nephron, more specifically from the collecting duct. Its morphological features are extremely variable, making its diagnosis difficult. We report the case of a 62-year old patient admitted with a painless progressive left flank swelling. CT scan showed a huge mass occupying the upper portion of the left kidney. The patient underwent radical nephrectomy. Anatomopathological examination showed collecting duct carcinoma of the kidney...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28889961/analysis-of-the-reversibility-of-biliary-cirrhosis-in-young-rats-submitted-to-biliary-obstruction
#4
Maria Julia de Aro Braz, Leonardo Ervolino Corbi, Ana Cristina Aoun Tannuri, Maria Cecília Mendonça Coelho, Josiane Oliveira Gonçalves, Suellen Serafini, Uenis Tannuri
BACKGROUND/PURPOSE: Biliary atresia and other liver biliary obstructions are relevant conditions in pediatric surgery due to their progression to biliary cirrhosis and indication for liver transplantation. It is known that the period during which biliary obstruction persists determines the development of cirrhosis and its reversibility after a biliary drainage procedure. However, no time or histological markers of biliary cirrhosis reversibility have been established. MATERIALS AND METHODS: One hundred and twenty-nine young Wistar rats underwent surgery for ligation of the common bile duct and were maintained until 8weeks...
August 24, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28883699/minor-endoscopic-sphincterotomy-followed-by-large-balloon-dilation-for-large-choledocholith-treatment
#5
Xiao-Dan Xu, Bo Chen, Jian-Jun Dai, Jian-Qing Qian, Chun-Fang Xu
AIM: To evaluate early and late outcomes of endoscopic papillary large balloon dilation (EPLBD) with minor endoscopic sphincterotomy (mEST) for stone removal. METHODS: A total of 149 consecutive patients with difficult common bile duct (CBD) stones (diameter ≥ 10 mm or ≥ 3 stones) underwent conventional endoscopic sphincterotomy (EST) or mEST plus EPLBD from May 2012 to April 2016. Their demographic, laboratory and procedural data were collected, and pancreaticobiliary complications were recorded...
August 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28883388/retrospective-clinical-study-of-the-effects-of-t-tube-placement-for-bile-duct-stricture
#6
İbrahim Tayfun Şahiner, Murat Kendirci
BACKGROUND T-tube placement in the common bile duct (CBD) is a surgical alternative to bile duct reconstruction in cholecystectomy for cholecysto-choledocholithiasis, or gallstones. The aim of this retrospective clinical study was to investigate the incidence of late complications of T-tube placement. MATERIAL AND METHODS Retrospective review identified 35 patients who had T-tube placement during cholecystectomy. Clinical data were collected on surgical indications, patient demographics, and clinical symptoms...
September 8, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28879225/preoperative-biliary-drainage-by-plastic-or-self-expandable-metal-stents-in-patients-with-periampullary-tumors-results-of-a-randomized-clinical-study
#7
Greger Olsson, Farshad Frozanpor, Lars Lundell, Lars Enochsson, Christoph Ansorge, Marco Del Chiaro, Marcus Reuterwall-Hansson, Alysha Shetye, Urban Arnelo
BACKGROUND AND STUDY AIMS : Preoperative biliary drainage in patients with periampullary tumors and jaundice has been popularized to improve the quality of life and minimize the risks associated with subsequent radical surgery. The aim of this study was to investigate the possible superiority of self-expandable metal stents (SEMS) over plastic stents, by comparing the amount of bacteria in intraoperatively collected bile and using this variable as a proxy for the efficacy of the respective biliary drainage modalities...
September 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28877883/versatility-of-nacl-transport-mechanisms-in-the-cortical-collecting-duct
#8
Aurélie Edwards, Gilles Crambert
The cortical collecting duct (CCD) forms part of the aldosterone-sensitive distal nephron and plays an essential role in maintaining the NaCl balance and acid-base status. The CCD epithelium comprises principal cells as well as different types of intercalated cells. Until recently, transcellular Na+ transport was thought to be restricted to principal cells, while (acid-secreting) type A and (bicarbonate-secreting) type B intercalated cells were associated with the regulation of acid-base homeostasis. This review describes how this traditional view has been upended by several discoveries in the last decade...
September 6, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28877879/uninephrectomy-and-apical-fluid-shear-stress-decrease-enac-abundance-in-collecting-duct-principal-cells
#9
Thomas Ernandez, Khalil Udwan, Alexandra Chassot, Pierre-Yves Martin, Eric Feraille
Acute nephron reduction such as after living kidney donation may increase the risk of hypertension. Uninephrectomy induces major hemodynamic changes in the remaining kidney resulting in rapid increase of single nephron GFR and fluid delivery in the distal nephron. Decreased sodium (Na) fractional reabsorption after the distal tubule has been reported after uninephrectomy in animals preserving volume homeostasis. In the present study, we thought to specifically explore the effect of unilateral nephrectomy on ENaC subunits expression in mice...
September 6, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28877065/hpv-related-multiphenotypic-sinonasal-carcinoma-an-expanded-series-of-49-cases-of-the-tumor-formerly-known-as-hpv-related-carcinoma-with-adenoid-cystic-carcinoma-like-features
#10
Justin A Bishop, Simon Andreasen, Jen-Fan Hang, Martin J Bullock, Tiffany Y Chen, Alessandro Franchi, Joaquin J Garcia, Douglas R Gnepp, Carmen R Gomez-Fernandez, Stephan Ihrler, Ying-Ju Kuo, James S Lewis, Kelly R Magliocca, Stefan Pambuccian, Ann Sandison, Emmanuelle Uro-Coste, Edward Stelow, Katalin Kiss, William H Westra
Human papillomavirus (HPV)-related multiphenotypic sinonasal carcinoma (HMSC), originally known as HPV-related carcinoma with adenoid cystic carcinoma-like features, is a peculiar neoplasm that is restricted to the sinonasal tract, exhibits features of both a surface-derived and salivary gland carcinoma (particularly adenoid cystic carcinoma), and is associated with high-risk HPV. Given the limited number of published cases, the full clinicopathologic spectrum of this neoplasm is unclear. Here, we present an updated experience of 49 cases...
September 4, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28873086/anti-mullerian-hormone-and-endometrial-cancer-a-multi-cohort-study
#11
Renée T Fortner, Helena Schock, Seungyoun Jung, Naomi E Allen, Alan A Arslan, Louise A Brinton, Brian L Egleston, Roni T Falk, Marc J Gunter, Kathy J Helzlsouer, Annika Idahl, Theron S Johnson, Rudolf Kaaks, Vittorio Krogh, Eva Lundin, Melissa A Merritt, Carmen Navarro, N Charlotte Onland-Moret, Domenico Palli, Xiao-Ou Shu, Patrick M Sluss, Paul N Staats, Antonia Trichopoulou, Elisabete Weiderpass, Anne Zeleniuch-Jacquotte, Wei Zheng, Joanne F Dorgan
BACKGROUND: The Mullerian ducts are the embryological precursors of the female reproductive tract, including the uterus; anti-Mullerian hormone (AMH) has a key role in the regulation of foetal sexual differentiation. Anti-Mullerian hormone inhibits endometrial tumour growth in experimental models by stimulating apoptosis and cell cycle arrest. To date, there are no prospective epidemiologic data on circulating AMH and endometrial cancer risk. METHODS: We investigated this association among women premenopausal at blood collection in a multicohort study including participants from eight studies located in the United States, Europe, and China...
September 5, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28869389/the-use-of-imaging-in-acute-pancreatitis-in-united-kingdom-hospitals-findings-from-a-national-quality-of-care-study
#12
Simon John McPherson, Derek A O'Reilly, Martin T Sinclair, Neil Smith
OBJECTIVE: To assess use of imaging in patients admitted to UK hospitals with acute pancreatitis (AP). METHODS: 4,479 patients had a diagnosis AP in the first 6 months of 2014. The National Confidential Enquiry into Patient Outcome and Death Patients (NCEPOD) selected patients with more severe AP for case review. Clinicians completed 712 questionnaires and case reviewers assessed 418 cases. The use of imaging in patients with AP is reported. RESULTS: The common causes of AP were gallstones (46...
September 4, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28867673/bmp7-dose-dependently-stimulates-proliferation-and-cadherin-11-expression-via-erk-and-p38-in-a-murine-metanephric-mesenchymal-cell-line
#13
Midori Awazu, Michio Nagata, Mariko Hida
BMP7 is expressed in ureteric buds and cap mesenchyme of the fetal kidney, mediating branching morphogenesis and survival and priming of metanephric mesenchyme. Although dose-dependent effects of BMP7 in collecting duct cells have been reported, studies in metanephric mesenchymal cells are lacking. We examined the effects of BMP7 on MAP kinase activation, proliferation, and expression of cadherins in a metanephric mesenchymal cell line MS7 by thymidine incorporation, immunoblot analysis, and quantitative real-time PCR The levels of phosphorylated ERK (P-ERK) and phosphorylated p38 (P-p38) were not altered at 10 min, 1 h, and 6 h with low-dose BMP7 (0...
August 2017: Physiological Reports
https://www.readbyqxmd.com/read/28867623/colonization-resistance-to-bile-and-virulence-properties-of-escherichia-coli-strains-unusual-characteristics-associated-with-biliary-tract-diseases
#14
Maryam Razaghi, Elahe Tajeddin, Leila Ganji, Masoud Alebouyeh, Amir Houshang Mohammad Alizadeh, Amir Sadeghi, Mohammad Reza Zali
Escherichia coli is the species that is most frequently isolated from bile of patients with biliary tract diseases. This study was aimed to investigate any association between resistance and virulence properties of these isolates with occurrence of the diseases. A total of 102 bile samples were obtained from patients subjected to endoscopic retrograde cholangiopancreatography for different biliary diseases. Clinical data were collected and culture of the bile samples was done on selective media. Resistance of characterized Escherichia coli isolates to deoxycholate sodium (0-7%) and nineteen antibiotics was determined and PCR using 16 pairs of primers targeting stx1, stx2, exhA, eae, bfp, agg, pcvd432, lt, st, ipaH, pic, pet, ast, set, sen, and cdtB genes was done...
September 1, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28861610/inhibitors-of-the-proteasome-stimulate-the-epithelial-sodium-channel-enac-through-sgk1-and-mimic-the-effect-of-aldosterone
#15
Morag K Mansley, Christoph Korbmacher, Marko Bertog
The epithelial sodium channel (ENaC) marks the tightly regulated, rate-limiting step of sodium re-absorption in the aldosterone-sensitive distal nephron (ASDN). Stimulation of ENaC activity by aldosterone involves the serum and glucocorticoid-induced kinase 1 (SGK1) and is mediated via complex mechanisms including inhibition of channel retrieval. Retrieved channels may be recycled or degraded, e.g. by the proteasomal pathway. The aim of the present study was to investigate whether inhibitors of the proteasome affect ENaC activity and surface expression, and to explore a possible involvement of SGK1...
August 31, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28859164/tss-seq-analysis-of-low-ph-induced-gene-expression-in-intercalated-cells-in-the-renal-collecting-duct
#16
Yuichiro Izumi, Hideki Inoue, Yushi Nakayama, Koji Eguchi, Yukiko Yasuoka, Naomi Matsuo, Hiroshi Nonoguchi, Yutaka Kakizoe, Takashige Kuwabara, Masashi Mukoyama
Metabolic acidosis often results from chronic kidney disease; in turn, metabolic acidosis accelerates the progression of kidney injury. The mechanisms for how acidosis facilitates kidney injury are not fully understood. To investigate whether low pH directly affects the expression of genes controlling local homeostasis in renal tubules, we performed transcription start site sequencing (TSS-Seq) using IN-IC cells, a cell line derived from rat renal collecting duct intercalated cells, with acid loading for 24 h...
2017: PloS One
https://www.readbyqxmd.com/read/28857089/-ercp-procedures-as-a-source-of-radiation-risk-to-a-single-gastroenterologist
#17
Maria A Staniszewska, Krzysztof Kujawski, Renata Kopeć, Krzysztof Sasak
BACKGROUND: One of the numerous sub-areas of interventional radiology is the use of X-rays in gastroenterology. X-ray fluoroscopy is applied in therapeutic procedures, including endoscopic retrograde cholangiopancreatography (ERCP) that is frequently performed. The ERCP procedure is aimed at imaging the pancreatic duct and biliary tracts. MATERIAL AND METHODS: In this paper radiation risk to the gastrenterologist performing ERCP procedures was investigated. The procedures were performed by a single gastroenterologist in the ERCP Laboratory, University Clinical Hospital Military Memorial Medical Academy - Central Veterans' Hospital in Łódź, Poland...
August 31, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28846946/surgical-treatment-for-the-excluded-bile-leakage-from-spiegel-lobe-after-right-hemihepatectomy-a-case-report
#18
Haruhi Fukuhisa, Masahiko Sakoda, Kiyokazu Hiwatashi, Satoshi Iino, Koji Minami, Motoyuki Hashiguchi, Yota Kawasaki, Hiroshi Kurahara, Yuko Mataki, Kosei Maemura, Hiroyuki Shinchi, Shinichi Ueno, Shoji Natsugoe
INRODUCTION: The treatments of excluded bile duct leakage after hepatectomy are not easy and various strategies have been reported, such as surgery, ethanol or fibrin glue injection, and portal vein embolization. PRESENTATION OF CASE: A 72-year-old man with a surgical history of laparoscopic ileocecal resection for diverticular bleeding was diagnosed as having hepatocellular carcinoma. Right hemihepatectomy was performed, and computed tomography examination on postoperative day 9 showed abdominal fluid collection in the right subphrenic space...
August 18, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28843412/single-tubule-rna-seq-uncovers-signaling-mechanisms-that-defend-against-hyponatremia-in-siadh
#19
Jae Wook Lee, Mohammad Alsady, Chung-Lin Chou, Theun de Groot, Peter M T Deen, Mark A Knepper, Carolyn M Ecelbarger
In the syndrome of inappropriate antidiuretic hormone secretion (SIADH), hyponatremia is limited by onset of vasopressin-escape caused by loss of the water channel aquaporin-2 in the renal collecting duct despite high circulating vasopressin. Here, we use the methods of systems biology in a well-established rat model of SIADH to identify signaling pathways activated at the onset of vasopressin-escape. Using single-tubule RNA-Seq, full transcriptomes were determined in microdissected cortical collecting ducts of vasopressin-treated rats at 1, 2, and 4 days after initiation of oral water loading in comparison to time-control rats without water loading...
August 23, 2017: Kidney International
https://www.readbyqxmd.com/read/28839277/quercetin-prevents-hepatic-fibrosis-by-inhibiting-hepatic-stellate-cell-activation-and-reducing-autophagy-via-the-tgf-%C3%AE-1-smads-and-pi3k-akt-pathways
#20
Liwei Wu, Qinghui Zhang, Wenhui Mo, Jiao Feng, Sainan Li, Jingjing Li, Tong Liu, Shizan Xu, Wenwen Wang, Xiya Lu, Qiang Yu, Kan Chen, Yujing Xia, Jie Lu, Ling Xu, Yingqun Zhou, Xiaoming Fan, Chuanyong Guo
The aim of this study was to investigate the effect of quercetin on hepatic fibrosis, a characteristic response to acute or chronic liver injury. Mice were randomized to bile duct ligation (BDL) or carbon tetrachloride (CCl4) cirrhosis models. Quercetin (100 mg/kg or 200 mg/kg daily) was administered by gavage for 2 or 4 weeks. Liver tissue and blood samples were collected for histological and molecular analysis. The results of our experiments showed that quercetin reduced BDL or CCl4 liver fibrosis, inhibited extracellular matrix formation, and regulated matrix metallopeptidase (MMP)-9 and tissue inhibitor of metalloproteinase (TIMP)-1...
August 24, 2017: Scientific Reports
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