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Urolithiasis

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https://www.readbyqxmd.com/read/29980798/high-prevalence-of-pediatric-urinary-tract-stones-in-xinjiang-uyghur
#1
Jian Huang, Hamulati Tusong, Abudukahaer Batuer, Aierken Tuerxun, Hans-Göran Tiselius, Wenqi Wu
The aim of the study was to report the characteristics of urolithiasis in Uyghur patients from Xinjiang, China. The composition of stones collected from 1863 patients in the Uyghur region of Xinjiang was analyzed. The median age of patients was 17 years [25th and 75th percentiles: 2, 36]. The stones were delivered by 1299 males (69.7%) and 564 females (30.3%). Calcium oxalate was the predominant stone component in 42.1% of the patients, followed by ammonium urate in 20.6%. Females had formed more stones of magnesium ammonium phosphate 8...
July 6, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29980797/protective-effect-of-pentoxifylline-on-oxidative-renal-cell-injury-associated-with-renal-crystal-formation-in-a-hyperoxaluric-rat-model
#2
Hayrettin Ozturk, Ayhan Cetinkaya, Tulin Siviloglu Firat, Buket Kin Tekce, Selma Erdogan Duzcu, Hulya Ozturk
The aim of the study is to investigate the effects of pentoxifylline (PTX) on the renal tubular cell injury and stone formation in a hyperoxaluric rat model induced by ethylene glycol and its possible underlying mechanisms. The study was performed with 30 male Wistar rats and randomized into three groups of teen. The sham-control (group 1) received only drinking water orally. The EG/untreated (group 2) received drinking water containing 0.75% EG for 4 weeks orally. The EG/PTX treated (group 3) received drinking water containing 0...
July 6, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29974193/impact-of-surgeon-s-experience-on-outcome-parameters-following-ureterorenoscopic-stone-removal
#3
I Wolff, S Lebentrau, A Miernik, T Ecke, C Gilfrich, B Hoschke, M Schostak, M May
Within the BUSTER trial, we analyzed the surgeon's amount of experience and other parameters associated with URS procedures regarding the stone-free rate, complication rate, and operative time. Patient characteristics and surgical details on 307 URS procedures were prospectively documented according to a standardized study protocol at 14 German centers 01-04/2015. Surgeon's experience was correlated to clinical characteristics, and its impact on the stone-free rate, complication rate, and operative time subjected to multivariate analysis...
July 4, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29959479/combined-antegrade-and-retrograde-access-to-difficult-ureters-revisiting-the-rendezvous-technique
#4
S R Keoghane, S J Deverill, J Woodhouse, V Shennoy, T Johnston, P Osborn
INTRODUCTION: Complex ureteric strictures present a significant challenge to the endourologist and uro-radiologist. Multiple separate interventions to try to cross the stricture are often attempted. We describe our experience managing a heterogenous patient group using the 'rendezvous' procedure. METHODS AND MATERIALS: 16 patients and 18 ureters (one bilateral procedure, and two separate procedures in one patient) underwent rendezvous procedures. Seven patients had coexisting ureteric calculi treated...
June 29, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29959478/testing-the-dogma-that-total-phospholipid-fatty-acid-composition-of-blood-plays-a-role-in-kidney-stone-pathogenesis-using-a-high-low-risk-human-model-results-from-a-pilot-study
#5
Allen L Rodgers, Dalielah Jappie-Mahomed, Paul J van Jaarsveld
Previous studies have suggested that ω-3 and ω-6 polyunsaturated fatty acid (PUFA) composition in plasma and red blood cell (RBC) total phospholipids plays a role in urolithiasis. Our aim was to test the robustness of this dogma by retrospectively comparing baseline profiles of these parameters in subjects from high- and low-stone-risk groups. The documented difference in stone occurrence in white (relatively common) (W) and black (rare) (B) subjects prompted us to select these groups as the high-low risk model for the study...
June 29, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29926136/association-between-vitamin-d-receptor-gene-polymorphisms-and-idiopathic-hypocitraturia-in-a-chinese-bai-population
#6
Kangjian Li, Yuhui Luo, Yin Mo, Jihong Shen, Xiaodong Liu, Hao Li
Idiopathic hypocitraturia (IH) is a risk factor for urolithiasis. IH is associated with vitamin D receptor (VDR) gene single nucleotide polymorphisms (SNPs) in a Chinese Han population. However, this association between VDR SNPs and IH has not been recapitulated in a Chinese Bai population. The aim of this study is to investigate the association between VDR SNPs and IH in a Chinese Bai population. A total of 320 participants comprising of 200 Chinese Bai patients with IH and 120 Chinese Bai control participants with normal urinary citrate level were enrolled for this study...
June 20, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29947996/an-in-vitro-evaluation-of-laser-settings-and-location-in-the-efficiency-of-the-popcorn-effect
#7
Daniel A Wollin, Westin R Tom, Ruiyang Jiang, W Neal Simmons, Glenn M Preminger, Michael E Lipkin
To examine different locations and laser settings' effects on the efficiency of the "popcorn" method of laser lithotripsy, which consists of placing the laser in a group of small stones and firing continuously to break them into smaller particles. Pre-fragmented BegoStones were created between 2 and 4 mm to mimic typical popcorning conditions. A 0.5 g collection of fragments was placed into 3D-printed models (a spherical calyx and ellipsoid pelvis model) and a 200-µm laser fiber was positioned above the stones...
June 15, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29947995/analyses-of-long-non-coding-rna-and-mrna-profiling-using-rna-sequencing-in-calcium-oxalate-monohydrate-stimulated-renal-tubular-epithelial-cells
#8
Zhu Wang, Jian-Wen Zhang, Ying Zhang, Sheng-Ping Zhang, Qi-Yi Hu, Hui Liang
To study the expression profiles of lncRNA and mRNA in the calcium oxalate monohydrate-attached HK-2 cells, and investigate the association between critical lncRNA expression level and renal injury. The HK-2 cells were treated with crystal suspension of calcium oxalate. The effects of calcium oxalate crystals on the growth of HK-2 cells were determined by MTT assay. Total RNA was extracted and the lncRNA and mRNA expression profiles were analyzed by high-throughput transcriptase sequencing platform HiSeq 2500...
June 15, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29947994/the-role-of-super-mini-percutaneous-nephrolithotomy-smp-in-the-treatment-of-symptomatic-lower-pole-renal-stones-lpss-after-the-failure-of-shockwave-lithotripsy-swl-or-retrograde-intrarenal-surgery-rirs
#9
Junhong Fan, Tao Zhang, Wei Zhu, Alberto Gurioli, Irene Raphael Ketegwe, Guohua Zeng
To assess the safety and efficacy of super-mini percutaneous nephrolithotomy (SMP) in the treatment of symptomatic lower pole renal stones (LPSs) after the failure of shockwave lithotripsy (SWL) or retrograde intrarenal surgery (RIRS), we retrospectively evaluated 44 patients with symptomatic LPSs with previously failed SWL or RIRS and consequently underwent SMP from October 2014 to March 2016. The percutaneous renal access was performed 12-14F with C-arm fluoroscopy or ultrasonographic guidance. Stone disintegration was performed using either Holmium laser or pneumatic lithotripter...
June 15, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29947993/oxalate-transport-by-the-mouse-intestine-in-vitro-is-not-affected-by-chronic-challenges-to-systemic-acid-base-homeostasis
#10
Jonathan M Whittamore, Marguerite Hatch
In rats, we recently showed how a chronic metabolic acidosis simultaneously reduced urinary oxalate excretion and promoted oxalate secretion by the distal colon leading to the proposition that acid-base disturbances may trigger changes to renal and intestinal oxalate handling. The present study sought to reproduce and extend these observations using the mouse model, where the availability of targeted gene knockouts (KOs) would offer future opportunities to reveal some of the underlying transporters and mechanisms involved...
June 14, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29947992/amelioration-of-hyperoxaluria-induced-kidney-dysfunction-by-chemical-chaperone-4-phenylbutyric-acid
#11
Richa Randhawa, Rishi Bhardwaj, Tanzeer Kaur
Hyperoxaluria is characterized by an increased excretion of urinary oxalate which is caused by inherited disorders or high oxalate intake leading to renal stone ailment. Until date, reactive oxygen species and inflammation has been convicted for the progression of kidney stones for which antioxidant therapy has been employed. However, recent studies have linked the association of endoplasmic reticulum stress and oxidative imbalance in the progression of renal diseases. Considering oxidative stress being at forefront in causing hyperoxaluric consequences, current study was designed to correlate the impact of hyperoxaluria and regulation of oxidative imbalance via inhibition of endoplasmic reticulum stress by 4-phenylbutyric acid (4-PBA)...
June 13, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29869684/new-techniques-on-uropaleopathology
#12
LETTER
Maximillien Gilles Baron, Nadia Benmoussa, Dominique Bazin, Isabelle Abadie, Michel Daudon, Philippe Charlier
No abstract text is available yet for this article.
June 5, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29869167/does-leaving-residual-fragments-after-percutaneous-nephrolithotomy-in-patients-with-positive-stone-culture-and-or-renal-pelvic-urine-culture-increase-the-risk-of-infectious-complications
#13
Tansu Degirmenci, Ibrahim Halil Bozkurt, Serdar Celik, Serkan Yarimoglu, Ismail Basmaci, Ertugrul Sefik
The residual fragments in patients with preoperative and intraoperative culture positivity may serve as an infection focus. The aim of this study was to assess the importance of residual fragments for developing SIRS in patients with stone culture and/or RPUC positivity. After obtaining institutional review board approval, a total of 729 patients who undergone PCNL for renal stones were included in this study. Residual fragments accepted to be positive if any fragment was detected irrespective of size. All patients were followed-up postoperatively for SIRS criteria...
June 4, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29858913/comparison-of-miniaturized-percutaneous-nephrolithotomy-and-standard-percutaneous-nephrolithotomy-for-the-treatment-of-large-kidney-stones-a-randomized-prospective-study
#14
Ali Güler, Akif Erbin, Burak Ucpinar, Metin Savun, Omer Sarilar, Mehmet Fatih Akbulut
We aimed to compare the outcomes of mini-percutaneous nephrolithotomy (mPNL) and standard PNL techniques in the treatment of renal stones ≥ 2 cm. The study was designed as a randomized prospective study between January 2016 and April 2017. The patients with a kidney stone ≥ 2 cm were included in the study. Patients who had uncorrectable bleeding diathesis, abnormal renal anatomy, skeletal tract abnormalities, pregnant patients and pediatric patients (< 18 years old) were excluded from the study...
June 1, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29777258/development-of-a-two-stage-in-vitro-model-system-to-investigate-the-mineralization-mechanisms-involved-in-idiopathic-stone-formation-stage-1-biomimetic-randall-s-plaque-using-decellularized-porcine-kidneys
#15
Archana C Lovett, Saeed R Khan, Laurie B Gower
Idiopathic calcium oxalate (CaOx) stone formers form stones that are commonly attached to calcium phosphate (CaP) deposits in the renal tissue, known as Randall's plaques (RP). Plaques are suggested to originate in the renal tubular basement membrane, where they exhibit a morphology of concentrically laminated apatitic spherules, while in the interstitial regions, the collagen fibrils and vesicles become mineralized. We hypothesize that these minerals might form by non-classical crystallization mechanisms, such as via amorphous precursors, some of which might originate from a polymer-induced liquid-precursor (PILP) process...
May 18, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29700572/long-term-effects-of-anatrophic-nephrolithotomy-on-selective-renal-function
#16
Ahmed R El-Nahas, Amr A Elsawy, Ahmed Abdelhalim, Mohamed M Elsaadany, Yasser Osman
To evaluate the long-term changes of selective renal function after anatrophic nephrolithotomy (ANL). A retrospective study was conducted for patients who underwent ANL between January 1995 and December 2016. Inclusion criteria were availability of preoperative and follow-up (1 year or more) radio-isotopic renal scans. Stone-free status was evaluated after 1 month with KUB and ultrasonography or NCCT. Renal isotope scans using 99mTc MAG3 were performed to measure the changes in selective function of the affected kidney (GFR%)...
April 26, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29696300/journey-of-a-cystinuric-patient-with-a-long-term-follow-up-from-a-medical-stone-clinic-necessity-to-be-safer-stone-and-fragments-entirely-removed
#17
Sacha L Moore, Bhaskar K Somani, Paul Cook
There is a lack of studies looking at the longitudinal follow-up of patients with cystine stones. We wanted to assess the journey of cystinuric patients through our specialist metabolic stone clinic to improve the understanding of episodes, interventions and current outcomes in this patient cohort. After ethical approval, all patients who attended our metabolic stone clinic from 1994 to 2014 with at least one cystine stone episode were included in our study. Data were retrospectively analysed for patient demographics, stone episodes or intervention, clinical parameters and patient compliance...
April 25, 2018: Urolithiasis
https://www.readbyqxmd.com/read/29619532/in-memory-of-professor-loris-borghi-1949-2018
#18
EDITORIAL
Giovanni Gambaro, Alberto Trinchieri
No abstract text is available yet for this article.
June 2018: Urolithiasis
https://www.readbyqxmd.com/read/28776078/sarna-mediated-activation-of-trpv5-reduces-renal-calcium-oxalate-deposition-in-rat-via-decreasing-urinary-calcium-excretion
#19
Tao Zeng, Xiaolu Duan, Wei Zhu, Yang Liu, Wenqi Wu, Guohua Zeng
Hypercalciuria is a main risk factor for kidney stone  formation. TRPV5 is the gatekeeper protein for mediating calcium transport and reabsorption in the kidney. In the present study, we tested the effect of TRPV5 activation with small activating RNA (saRNA), which could induce gene expression by targeting the promoter of the gene, on ethylene glycol (EG)-induced calcium oxalate (CaOx) crystals formation in rat kidney. Five pairs of RNA activation sequences targeting the promoter of rat TRPV5 were designed and synthesized...
June 2018: Urolithiasis
https://www.readbyqxmd.com/read/28674784/vitamin-b6-intake-and-the-risk-of-incident-kidney-stones
#20
Pietro Manuel Ferraro, Eric N Taylor, Giovanni Gambaro, Gary C Curhan
Higher vitamin B6 intake might reduce urinary excretion of oxalate, one of the major determinants of risk for calcium oxalate kidney stones. Previous studies investigating the association between intake of vitamin B6 and risk of stones found conflicting results. We sought to investigate the association in three large prospective cohorts. We prospectively examined the association in the Health Professionals Follow-up Study (HPFS; n = 42,919 men), Nurses' Health Study I (NHS I; n = 60,003 older women), and Nurses' Health Study II (NHS II; n = 90,629 younger women)...
June 2018: Urolithiasis
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