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Ureteral injury

Miguel Fontecha-Barriuso, Diego Martin-Sanchez, Olga Ruiz-Andres, Jonay Poveda, Maria Dolores Sanchez-Niño, Lara Valiño-Rivas, Marta Ruiz-Ortega, Alberto Ortiz, Ana Belén Sanz
Epigenetics refers to heritable changes in gene expression patterns not caused by an altered nucleotide sequence, and includes non-coding RNAs and covalent modifications of DNA and histones. This review focuses on functional evidence for the involvement of DNA and histone epigenetic modifications in the pathogenesis of kidney disease and the potential therapeutic implications. There is evidence of activation of epigenetic regulatory mechanisms in acute kidney injury (AKI), chronic kidney disease (CKD) and the AKI-to-CKD transition of diverse aetiologies, including ischaemia-reperfusion injury, nephrotoxicity, ureteral obstruction, diabetes, glomerulonephritis and polycystic kidney disease...
March 9, 2018: Nephrology, Dialysis, Transplantation
Wesley Baas, Blake O'Connor, Ahmed El-Zawahry
A 57-year-old African American male presented with vague abdominal pain and bilateral flank pain. The patient was found to have bilateral hydronephrosis and significant renal function impairment secondary to pelvic lipomatosis. Pelvic lipomatosis represents a clinically-diagnosed unique cause of ureteral obstruction and subsequent renal impairment. We present a case report of newly diagnosed pelvic lipomatosis, the clinical and imaging characteristics for diagnosis, and its conservative management with serial ureteral stent exchanges...
February 2018: Canadian Journal of Urology
Shouzhe Lin, Dameng Lian, Weihua Liu, Aaron Haig, Ian Lobb, Ahmed Hijazi, Hassan Razvi, Jeremy Burton, Matthew Whiteman, Alp Sener
OBJECTIVES: To assess the effects of slow-releasing H2 S donor GYY4137 on post-obstructive renal function and injury following unilateral ureteral obstruction (UUO) by using the UUO and reimplantation (UUO-R) model in rats and to elucidate potential mechanisms by using an in vitro model of epithelial-mesenchymal transition (EMT). METHODS: Male Lewis rats underwent UUO at the left ureterovesical junction. From post-obstructive day (POD) 1-13, rats received daily intraperitoneal (IP) injection of phosphate buffered saline (PBS, 1 mL) or GYY4137 (200 μmol/kg/day in 1 mL PBS, IP)...
March 6, 2018: Nitric Oxide: Biology and Chemistry
Ozgur Haki Yuksel, Caglar Yildirim, Ahmet Urkmez, Nurver Ozbay, Fatih Uruc, Aytac Sahin, Serkan Akan, Ayhan Verit
OBJECTIVES: The most important treatment strategy for obstructive nephropathy is to protect renal tissue from the deleterious effects of fibrosis. Therefore, we sought to investigate the renoprotective effects of darbepoetin alfa on unilateral ureteral obstructions. METHODS: We used 12 female and 12 male 3-monthold Wistar rats weighing between 250 and 350 g. The rats were divided equally into sham, darbepoetin and control groups. With the exception of the sham group, left unilateral obstructions were applied to all of the rats...
March 2018: Archivos Españoles de Urología
Julio T Chong, Kathleen M Kan, Courtney K Phillips, Alexander Greenstein
Purpose: Placement of pre-operative ureteral catheters for colorectal surgery can aid in the identification of ureteral injuries. This study investigates whether simultaneous ureteral catheterization with surgery skin preparation can minimize operating room times without increasing post-operative complications. Materials and Methods: Patients undergoing simultaneous colorectal surgery skin preparation and placement of pre-operative ureteral catheters (n=21) were compared to those who underwent these events sequentially (n=28)...
March 2018: Investigative and Clinical Urology
Mallika Ghosh, Shobha Thangada, Oisharya Dasgupta, Kamal M Khanna, Harold T Yamase, Michael Kashgarian, Timothy Hla, Linda H Shapiro, Fernando A Ferrer
Sphingosine Kinase-2 (Sphk2) is responsible for the production of the bioactive lipid Sphingosine-1 Phosphate, a key regulator of tissue repair. Here we address the in vivo significance of Sphingosine Kinase -2 in renal inflammation/fibrosis in response to unilateral ureteral obstruction using both genetic and pharmacological strategies. Obstructed kidneys of Sphk2-/- mice showed reduced renal damage and diminished levels of the renal injury markers TGFβ1 and αSMA when compared to wild type controls. We found a consistently significant increase in anti-inflammatory (M2) macrophages in obstructed Sphk2-/- kidneys by flow cytometry and a decrease in mRNA levels of the inflammatory cytokines, MCP1, TNFα, CXCL1 and ILβ1, suggesting an anti-inflammatory bias in the absence of Sphk2...
2018: PloS One
Cyrille Guillot-Tantay, Emmanuel Chartier-Kastler, Marie-Aimée Perrouin-Verbe, Pierre Denys, Priscilla Léon, Véronique Phé
STUDY DESIGN: Retrospective cohort study. OBJECTIVES: To report the long-term complications of non-continent cutaneous urinary diversion (NCCUD) in adult patients with spinal cord injury (SCI). SETTING: Hospital in Paris, France. METHODS: A retrospective single center study included all adult patients with SCI who underwent an ileal conduit between 1997 and 2014. Early complications were reported according to Clavien-Dindo classification...
March 7, 2018: Spinal Cord
Benjamin West, Mohamed Keheila, Jason C Smith, Alexander Erskine, Samuel R Abourbih, Nazih Khater, D Duane Baldwin
Objective: Cryoablation of renal tumors adjacent to the ureter or pelvicalyceal system carries risks for thermal injury of the collecting system. Although cold antegrade perfusion has been described for radiofrequency ablation, warm saline perfusion for renal cryoablation has not been well-characterized. The purpose of this study was to determine the safety and feasibility of antegrade and retrograde warm saline perfusions during percutaneous renal cryoablation. Material and methods: A retrospective review was performed on 136 patients treated with percutaneous renal cryoablation at a single academic institution between 2009 and 2015...
March 2018: Turkish Journal of Urology
Giovanni Panico, Giuseppe Campagna, Daniela Caramazza, Nicola Amato, Alfredo Ercoli, Giovanni Scambia, Mauro Cervigni, Riccardo Zaccoletti
INTRODUCTION AND HYPOTHESIS: Uterovaginal prolapse treatment is a challenge for the urogynecologist. Surgical management for apical prolapse can be successful with native tissue and uterosacral ligament (USL) fixation. However, some complications have been described, especially with use of the vaginal approach. The aim of this video is to describe an alternative laparoscopic approach to a traditional vaginal procedure to reduce nerve injury and ureteral complications. METHODS: A 75-year-old woman was referred to our unit for symptomatic stage III apical prolapse and underwent laparoscopic USL fixation, according to the technique described herein...
March 2, 2018: International Urogynecology Journal
S J Walton, G Malietzis, S K Clark, E Havranek
The aim of this retrospective cohort study was to review urological complication rates arising from familial adenomatous polyposis associated desmoid tumours and their management. All patients over a 35-year period were identified from a prospectively maintained polyposis registry database and had an intra-abdominal desmoid tumour. Those without ureteric complications (n = 118, group A) were compared to those that developed ureteric obstruction (n = 40, group B) for demographics, treatment interventions and survival outcomes...
February 27, 2018: Familial Cancer
Carlos Gustavo Trujillo, Cristina Domínguez, Daniela Robledo, Juan Ignacio Caicedo, Alejandra Bravo-Balado, Juan Guillermo Cataño, Natalia Cortés, Lina Parra, Wilson Riaño, Eduardo Londoño-Schimmer, Jorge Otero, Gabriel Herrera, Fernando Arias, Mauricio Plata
BACKGROUND: Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS-HIPEC) is associated with significant manipulation of the urinary tract (UT). We aim to describe the urological events and their management in patients who underwent CRS-HIPEC. METHODS: Clinical records of patients who underwent treatment between 2007 and 2015 were reviewed. Urological events and their multidisciplinary management were analyzed. Descriptive statistics were calculated...
February 23, 2018: Acta Chirurgica Belgica
Volkan Tugcu, Abdulmuttalip Simsek, Ismail Yigitbasi, Mustafa Gurkan Yenice, Selcuk Sahin, Ali Ihsan Tasci
Background: After almost two decades, transabdominal robotic radical prostatectomy techniques have been fully developed and are widely practiced by many robotic urologists. Recently, a transperineal robotic radical prostatectomy, a technique not yet popular to many, was introduced as an alternative approach in patients with previous abdominal surgery. Here, we present our unique experience with robotic perineal radical prostatectomy (r-PRP) on a kidney transplant recipient. Case Presentation: A 71-year-old man who had a kidney transplant 4 months previously was diagnosed with prostate cancer (PCa) and underwent r-PRP using the da Vinci Xi robotic system...
2018: Journal of Endourology Case Reports
Lyne Gagnon, Martin Leduc, Jean-Francois Thibodeau, Ming-Zhi Zhang, Brigitte Grouix, Francois Sarra-Bournet, William Gagnon, Kathy Hince, Mikaël Tremblay, Lilianne Geerts, Christopher R J Kennedy, Richard L Hébert, Alex Gutsol, Chet E Holterman, Eldjonai Kamto, Liette Gervais, Jugurtha Ouboudinar, Jonathan Richard, Alexandra Felton, Alexandre Laverdure, Jean-Christophe Simard, Sylvie Létourneau, Marie-Pier Cloutier, Francois A Leblond, Shaun D Abbott, Christopher Penney, Jean-Simon Duceppe, Boulos Zacharie, Jocelyn Dupuis, Angelino Calderone, Quang Trinh Nguyen, Raymond C Harris, Pierre Laurin
Numerous clinical conditions can lead to organ fibrosis and functional failure. There is a great need for therapies that could effectively target pathophysiological pathways involved in fibrosis. GPR40 and GPR84 are G protein-coupled receptors with free fatty acid ligands and are associated with metabolic and inflammatory disorders. Although GPR40 and GPR84 are involved in diverse physiological processes, no evidence has demonstrated the relevance of GPR40 and GPR84 in fibrosis pathways. Using PBI-4050 (3-pentylbenzeneacetic acid sodium salt), a synthetic analog of a medium-chain fatty acid that displays agonist and antagonist ligand affinity toward GPR40 and GPR84, respectively, we uncovered an antifibrotic pathway involving these receptors...
February 15, 2018: American Journal of Pathology
Mi Ra Noh, Chang-Hoon Woo, Mae-Ja Park, Jee In Kim, Kwon Moo Park
Fibrosis is an undesirable consequence of injury and a critical problem in many diseases. Recent studies have demonstrated an association of C/EBP homologous protein (CHOP) with fibrosis. We investigated the mechanism of CHOP in kidney fibrosis progression after unilateral ureteral obstruction (UUO) using Chop gene-deleted (Chop-/-) mice and their wild-type littermates (Chop+/+). UUO-induced kidney fibrosis was reduced in the Chop-/- than Chop+/+ mice. After UUO, CHOP expression was detected in the cytosol and nucleus of distal tubule cells and collecting duct cells of the kidney...
February 6, 2018: Biochimica et Biophysica Acta
Mitsuru Imamura, Jong-Seok Moon, Kuei-Pin Chung, Kiichi Nakahira, Thangamani Muthukumar, Roman Shingarev, Stefan W Ryter, Augustine Mk Choi, Mary E Choi
Renal fibrosis is a common pathogenic response to injury in chronic kidney disease (CKD). The receptor-interacting protein kinase-3 (RIPK3), a regulator of necroptosis, has been implicated in disease pathogenesis. In mice subjected to unilateral ureteral obstruction-induced (UUO-induced) or adenine diet-induced (AD-induced) renal fibrosis, models of progressive kidney fibrosis, we demonstrate increased kidney expression of RIPK3. Mice genetically deficient in RIPK3 displayed decreased kidney fibrosis and improved kidney function relative to WT mice when challenged with UUO or AD...
February 8, 2018: JCI Insight
Vasileios I Sakalis, Rachel Oliver, Peter J Guy, Melissa C Davies
CONTEXT/OBJECTIVE: Vesico-ureteric reflux(VUR) is a known complication of neuropathic bladder in spinal cord injury(SCI) population. Bulking agents such as Macroplastique are new minimally-invasive treatment option for VUR with good results. The aim of this study is to assess the efficacy of Macroplastique alone or in combination with Botox(BTX-A), in managing VUR in SCI population with presumed healthy bladders and correlate the pre-and post-injection urodynamic findings with the outcome...
February 7, 2018: Journal of Spinal Cord Medicine
Kyo Chul Koo, Jun-Ho Yoon, No-Cheol Park, Hye Sun Lee, Hyun Kyu Ahn, Kwang Suk Lee, Do Kyung Kim, Kang Su Cho, Byung Ha Chung, Chang Hee Hong
PURPOSE: Excessive bulking force during primary access of the ureteral access sheath (UAS) may induce ureteral injury. To investigate the efficacy of preoperative α-blockade for reducing UAS insertion forces (UASIF) and to determine the upper limit required to avoid ureteral injury. MATERIALS AND METHODS: In a randomized controlled trial, 135 patients from a single institution, who had ureteropelvic junction or renal pelvis stones and were planned to undergo retrograde intrarenal surgery (RIRS), were prospectively enrolled from December 2015 to January 2017...
February 1, 2018: Journal of Urology
Robert H Blackwell, Eric J Kirshenbaum, Arpeet S Shah, Paul C Kuo, Gopal N Gupta, Thomas M T Turk
PURPOSE: Ureteral injury represents an uncommon but potentially morbid complication surgical complication. This study sought to characterize the complications of iatrogenic ureteral injury and assess the effect of recognized vs delayed recognition on patient outcomes. MATERIALS AND METHODS: Hysterectomy patients were identified in the Healthcare Cost and Utilization Project State Inpatient Database for California, years 2007-2011. Ureteral injuries were identified and categorized as recognized (diagnosed/repaired the day of hysterectomy) and unrecognized (diagnosed/repaired postoperatively)...
February 2, 2018: Journal of Urology
Yongping Wang, Chengji J Zhou, Youhua Liu
Wnt signal cascade is an evolutionarily conserved, developmental pathway that regulates embryogenesis, injury repair, and pathogenesis of human diseases. It is well established that Wnt ligands transmit their signal via canonical, β-catenin-dependent and noncanonical, β-catenin-independent mechanisms. Mounting evidence has revealed that Wnt signaling plays a key role in controlling early nephrogenesis and is implicated in the development of various kidney disorders. Dysregulations of Wnt expression cause a variety of developmental abnormalities and human diseases, such as congenital anomalies of the kidney and urinary tract, cystic kidney, and renal carcinoma...
January 2018: Progress in Molecular Biology and Translational Science
Thomas Sewell, Hannah Courtney, Sherif Tawfeek, Reda Afifi
OBJECTIVE: To investigate the feasibility and safety of transvaginal bilateral salpingo-oophorectomy (BSO). METHODS: The present retrospective case series included consecutive women who underwent transvaginal BSO at a single general gynecology unit at Weston General Hospital, Weston-super-Mare, UK, between February 1, 2011, and July 31, 2014. Transvaginal BSO procedures were performed by an experienced surgeon. Feasibility and safety outcomes were reviewed from patient case notes...
February 1, 2018: International Journal of Gynaecology and Obstetrics
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