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Stone formation

Duncan R Morhardt, Miriam Hadj-Moussa, He Chang, J Stuart Wolf, William W Roberts, John T Stoffel, Gary J Faerber, Anne P Cameron
OBJECTIVE: To evaluate the association of clinical factors on outcomes in SCI patients undergoing ureteroscopy. Immobility, recurrent urinary tract infection, and lower urinary tract dysfunction contribute to renal stone formation in spinal cord injury (SCI) patients. Ureteroscopy is a commonly utilized treatment modality, however, surgical complication rates and outcomes have been poorly defined. Evidence guiding safe and effective treatment of stones in this cohort remains scarce. METHODS: Records were retrospectively reviewed for SCI patients who underwent ureteroscopy for kidney stones from 1996-2014 at a single institution...
March 12, 2018: Urology
Tatenda C Nzenza, Yahya Al-Habbal, Glen R Guerra, S Manolas, Tuck Yong, Trevor McQuillan
BACKGROUND: Endoscopic retrograde cholangiopancreatography (ERCP) with endoscopic sphincterotomy (ES) has become well established as a modality for the management of common bile duct stones (CBDS), especially in the setting of associated cholangitis. Our study aims to determine the rate of long term morbidity of recurrent CBDS post ES. METHODS: A retrospective analysis of patients who underwent ERCP and ES (ERCP+ES) was undertaken on a prospectively maintained database from 1998 to 2012 at the Northern Hospital, Melbourne...
March 15, 2018: BMC Gastroenterology
Emre Turkoz, Antonio Perazzo, Hyoungsoo Kim, Howard A Stone, Craig B Arnold
Understanding jet formation from non-Newtonian fluids is important for improving the quality of various printing and dispensing techniques. Here, we use a laser-based nozzleless method to investigate impulsively formed jets of non-Newtonian fluids. Experiments with a time-resolved imaging setup demonstrate multiple regimes during jet formation that can result in zero, single, or multiple drops per laser pulse. These regimes depend on the ink thickness, ink rheology, and laser energy. For optimized printing, it is desirable to select parameters that result in a single-drop breakup; however, the strain-rate dependent rheology of these inks makes it challenging to determine these conditions a priori...
February 16, 2018: Physical Review Letters
Anthony Atala
No abstract text is available yet for this article.
May 2017: Journal of Urology
Atsushi Okada, Shuzo Hamamoto, Kazumi Taguchi, Rei Unno, Teruaki Sugino, Ryosuke Ando, Kentaro Mizuno, Keiichi Tozawa, Kenjiro Kohri, Takahiro Yasui
BACKGROUND: We investigated the renoprotective ability of healthy people against kidney stone formation. To clarify intratubular crystal kinetics and processing in human kidneys, we performed a quantitative and morphological observation of nephrectomized renal parenchyma tissues. METHODS: Clinical data and pathological samples from 60 patients who underwent radical nephrectomy for renal cancer were collected from June 2004 to June 2010. The patients were retrospectively classified as stone formers (SFs; n = 30, kidney stones detected by preoperative computed tomography) and non-stone formers (NSFs; n = 30, no kidney stone history)...
March 12, 2018: BMC Urology
Luis G Vargas Buonfiglio, Jennifer A Borcherding, Mark Frommelt, Gavin J Parker, Bryce Duchman, Oriana G Vanegas Calderón, Ruth Fernandez-Ruiz, Julio E Noriega, Elizabeth A Stone, Alicia K Gerke, Joseph Zabner, Alejandro P Comellas
BACKGROUND: Smoking is a leading cause of respiratory infections worldwide. Tobacco particulate matter disrupts iron homeostasis in the lungs and increases the iron content in the airways of smokers. The airway epithelia secrete lactoferrin to quench iron required for bacteria to proliferate and cause lung infections. We hypothesized that smokers would have increased bacterial growth and biofilm formation via iron lactoferrin imbalance. METHODS: We collected bronchoalveolar lavage (BAL) samples from non-smokers and smokers...
March 10, 2018: Respiratory Research
Ayse Betul Ergul, Mehmet Kara, Cigdem Karakukcu, Arzu Tasdemir, Humeyra Aslaner, Mehmet Ali Ergul, Sebahattin Muhtaroglu, Gozde Erturk Zararsiz, Yasemin Altuner Torun
Boron plays roles in the metabolism of calcium, vitamin D, steroid hormones, healthy bone development, and maintenance of cell membranes. The biological effects of boron are dose-dependent but follow a U-shaped pattern, rendering it important to define the active range. The studies of Bahadoran et al. on rats and Naghii et al. on humans showed that low doses of boron (3 and 10 mg/day) prevented kidney stone formation. The aim of this study was to determine whether high doses of boron have an anti-urolithiatic or antioxidant effect on nephrolithiasis in an experimental rat model...
March 8, 2018: Biological Trace Element Research
Ho Won Kang, Kang Su Cho, Won Sik Ham, Dong Hyuk Kang, Hae Do Jung, Jong Kyou Kwon, Young Deuk Choi, Joo Yong Lee
Purpose: This study aims to assess the predictive factors and treatment outcomes of Steinstrasse formation following shock wave lithotripsy (SWL) for ureter stone. Materials and Methods: The medical records of 1,418 ureter stone patients who underwent one-session SWL from November 2005 to May 2013 at our medical institute were retrospectively reviewed. Finally, 551 patients met inclusion criteria. Maximal length and location of stone, stone attenuation (Hounsfield units), and skin-to-stone distance (SSD) were determined on pretreatment non-contrast computed tomography...
March 2018: Investigative and Clinical Urology
Ho Young Ryu, You Kyoung Lee, Juhyun Park, Hwancheol Son, Sung Yong Cho
Purpose: Dietary factors are one of the main causes of urolithiasis. However, little research has evaluated dietary factors related to urolithiasis in Korea. We investigated the various dietary risk factors for urinary stone formation in Korean people. Materials and Methods: We conducted a prospective case-control pilot study. A total of 27 patients newly diagnosed with urolithiasis and 20 applicants without urolithiasis were designated as the patients and the control group, respectively...
March 2018: Investigative and Clinical Urology
Mina Cheraghi Nirumand, Marziyeh Hajialyani, Roja Rahimi, Mohammad Hosein Farzaei, Stéphane Zingue, Seyed Mohammad Nabavi, Anupam Bishayee
Kidney stones are one of the oldest known and common diseases in the urinary tract system. Various human studies have suggested that diets with a higher intake of vegetables and fruits play a role in the prevention of kidney stones. In this review, we have provided an overview of these dietary plants, their main chemical constituents, and their possible mechanisms of action. Camellia sinensis (green tea), Rubus idaeus (raspberry), Rubia cordifolia (common madder), Petroselinum crispum (parsley), Punica granatum (pomegranate), Pistacia lentiscus (mastic), Solanum xanthocarpum (yellow-fruit nightshade), Urtica dioica (stinging nettle), Dolichos biflorus ( horse gram ), Ammi visnaga (khella), Nigella sativa (black-cumin), Hibiscus sabdariffa (roselle), and Origanum vulgare (oregano) have received considerable interest based on scientific evidence...
March 7, 2018: International Journal of Molecular Sciences
Tilahun Alelign, Beyene Petros
Kidney stone disease is a crystal concretion formed usually within the kidneys. It is an increasing urological disorder of human health, affecting about 12% of the world population. It has been associated with an increased risk of end-stage renal failure. The etiology of kidney stone is multifactorial. The most common type of kidney stone is calcium oxalate formed at Randall's plaque on the renal papillary surfaces. The mechanism of stone formation is a complex process which results from several physicochemical events including supersaturation, nucleation, growth, aggregation, and retention of urinary stone constituents within tubular cells...
2018: Advances in Urology
Tomoki Sakakida, Hideki Sato, Toshifumi Doi, Takumi Kawakami, Yoshikazu Nakatsugawa, Ken Nishimura, Shinya Yamada, Hideki Fujii, Naoya Tomatsuri, Yusuke Okuyama, Hiroyuki Kimura, Norimasa Yoshida
We report a rare case of bile duct stone formation around an ingested fish bone as a nidus after pancreatoduodenectomy. A 78-year-old woman was admitted to our department for fever and epigastric pain. Abdominal computed tomography revealed an elongated bile duct stone containing a linearly shaped foreign body of bone density. Enteroscopic lithotomy was performed using single balloon enteroscopy to safely remove the stone and foreign body from the bile duct. The foreign body was determined to be a fish bone by pathological examination and component analysis...
January 2018: Case Reports in Gastroenterology
Florence F Wagner, Lina Benajiba, Arthur J Campbell, Michel Weïwer, Joshua R Sacher, Jennifer P Gale, Linda Ross, Alexandre Puissant, Gabriela Alexe, Amy Conway, Morgan Back, Yana Pikman, Ilene Galinsky, Daniel J DeAngelo, Richard M Stone, Taner Kaya, Xi Shi, Matthew B Robers, Thomas Machleidt, Jennifer Wilkinson, Olivier Hermine, Andrew Kung, Adam J Stein, Damodharan Lakshminarasimhan, Michael T Hemann, Edward Scolnick, Yan-Ling Zhang, Jen Q Pan, Kimberly Stegmaier, Edward B Holson
Glycogen synthase kinase 3 (GSK3), a key regulatory kinase in the wingless-type MMTV integration site family (WNT) pathway, is a therapeutic target of interest in many diseases. Although dual GSK3α/β inhibitors have entered clinical trials, none has successfully translated to clinical application. Mechanism-based toxicities, driven in part by the inhibition of both GSK3 paralogs and subsequent β-catenin stabilization, are a concern in the translation of this target class because mutations and overexpression of β-catenin are associated with many cancers...
March 7, 2018: Science Translational Medicine
Jihua Wu, Zhiwei Tao, Yaoliang Deng, Quan Liu, Yunlong Liu, Xiaofeng Guan, Xiang Wang
Calcifying nanoparticles (CNPs) play an important role in kidney stone formation, but the mechanism(s) are unclear. CNPs were isolated and cultured from midstream urine of patients with kidney stones. CNP morphology and characteristics were examined by electron microscopy and electrophoresis analysis. Chemical composition was analyzed using energy-dispersive X-ray microanalysis and Western blotting. Human renal proximal convoluted tubule cell (HK-2) cultures were exposed to CNPs for 0, 12 and 72 h, and production of reactive oxygen species (ROS), mitochondrial membrane potential and apoptosis levels were evaluated...
March 6, 2018: Urolithiasis
Serdar Yalcin, Yusuf Kibar, Theodoros Tokas, Elif Gezginci, Armagan Günal, Mahmut Taha Ölcücü, Ibrahim Yasar Ozgok, Ali Serdar Gozen
OBJECTIVE: To compare the barbed polyglyconate suture (BPS) with two commonly used conventional sutures, this prospective randomized trial was designed. The sutures applied in the urinary collecting system, in terms of long-term histopathological and macroscopic suture material features. MATERIAL AND METHODS: Eight female and 6 male New Zeeland rabbits were included in the study. Each animal served as its own control and was subjected to cystotomy. Watertight running cystorrhaphies were performed utilizing three different sutures in a randomized fashion, namely MonocrylTM , VicrylTM , and V-LocTM 90...
March 2, 2018: Urology
Muhammed A P Manzoor, M Mujeeburahiman, Punchappady-Devasya Rekha
Urinary stones are complex mineralogical formations in the urinary system often impairing the kidney function. Several studies have attempted to understand the mechanisms of stone formation and growth; however, it remains to be fully explored. Here, we present a detailed investigation on the morphological and mineralogical characterizations of urinary stones. Structural properties of different types of urinary stones were done by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and field-emission scanning electron microscope (FE-SEM) analyses...
March 5, 2018: Urolithiasis
Hironari Hayama, Kenji Fueki, Juro Wadachi, Noriyuki Wakabayashi
PURPOSE: It remains unclear whether digital impressions obtained using an intraoral scanner are sufficiently accurate for use in fabrication of removable partial dentures. We therefore compared the trueness and precision between conventional and digital impressions in the partially edentulous mandible. METHODS: Mandibular Kennedy Class I and III models with soft silicone simulated-mucosa placed on the residual edentulous ridge were used. The reference models were converted to standard triangulated language (STL) file format using an extraoral scanner...
March 1, 2018: Journal of Prosthodontic Research
Daniel J Lama, Shoaib Safiullah, Albert Yang, Zhamshid Okhunov, Jaime Landman, Ralph V Clayman
The concept of adipose tissue as an organ unto itself represents a new medical construct; already differences in the volume of perirenal fat around a tumor-bearing kidney have been described. We hypothesized that renal calculi may have similar impact on perirenal fat or alternatively abnormalities in urinary metabolites may be the result of perirenal fat affecting renal metabolism and subsequent stone formation. Accordingly, we conducted a study utilizing three-dimensional imaging software to evaluate perirenal fat volume (PFV) in patients with nephrolithiasis...
March 2, 2018: Urolithiasis
Shumei Li, Xueqiang Su, Qing Jin, Guohui Li, Yanming Sun, Muhammad Abdullah, Yongping Cai, Yi Lin
Most pears in Anhui Province are a kind of self-incompatible fruit whose quality is strongly influenced by the male pollen. The proteomic variation of Dangshan Su pollinated by different varieties was analysed using the isobaric tag for relative and absolute quantitation (iTRAQ) to investigate the effect of pollination by different varieties on the pear lignin pathway. Among the 3980 proteins identified from the two samples, 139 proteins were identified as differentially expressed proteins (DEPs). Of these proteins, laccase-4 (LAC4), was found to be related with lignin synthesis, and β-glucosidase 15 (BGLU15) and peroxidase 47 (PER47) were involved in the phenylpropanoid pathway...
March 1, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Yunlong Liu, Quan Liu, Xiang Wang, Ziqi He, Derong Li, Xiaofeng Guan, Zhiwei Tao, Yaoliang Deng
BACKGROUND/AIMS: Nephrolithiasis is a common and frequently occurring disease, its exact pathogenesis is remains unclear. Emerging data suggest that autophagy plays a vital role in the pathophysiological processes of kidney diseases. Therefore, this study was designed to investigate the potential role of autophagy in the formation of calcium oxalate (CaOx) kidney stones in rat model. METHODS: Thirty-two rats were randomly divided into four groups (eight rats/group): untreated control group, stone model group, rapamycin-treated group, chloroquine-treated group...
February 22, 2018: Kidney & Blood Pressure Research
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