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Calcium oxalate stone

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https://www.readbyqxmd.com/read/29142413/antiurolithiatic-potential-of-neeri-against-calcium-oxalate-stones-by-crystallization-inhibition-free-radicals-scavenging-and-nrk-52e-cell-protection-from-oxalate-injury
#1
Parveen Kumar Goyal, Santosh Kumar Verma, Anil Kumar Sharma
Background: Neeri is a well-established polyherbal formulation prescribed for renal stones by the physicians but has not been experimentally evaluated for its antiurolithiatic potential using cell-lines. Objective: This study is aimed to scientifically substantiate the antiurolithiatic effect of Neeri extract (NRE) through calcium oxalate (CaOx) crystallization inhibition, scavenging of free radicals, and protection of renal tubular epithelial NRK-52E cells from oxalate-induced injury...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29132983/relative-supersaturation-of-24-hour-urine-and-likelihood-of-kidney-stones
#2
Megan Prochaska, Eric Taylor, Pietro Manuel Ferraro, Gary Curhan
PURPOSE: Relative supersaturations of calcium oxalate, calcium phosphate, and uric acid are used clinically in kidney stone prevention. The magnitudes of association between relative supersaturation and stone risk require further quantification. MATERIALS AND METHODS: We performed a cross-sectional study using 24-hour urine collections from Nurses' Health Study I (NHS I), Nurses' Health Study II (NHS II), and Health Professional Follow-up Study (HPFS) cohorts to quantify the association between calcium oxalate, calcium phosphate, and uric acid relative supersaturations levels and likelihood of stone formation...
November 10, 2017: Journal of Urology
https://www.readbyqxmd.com/read/29110180/correlation-between-the-molecular-effects-of-mutations-at-the-dimer-interface-of-alanine-glyoxylate-aminotransferase-leading-to-primary-hyperoxaluria-type-i-and-the-cellular-response-to-vitamin-b6
#3
Mirco Dindo, Elisa Oppici, Daniele Dell'Orco, Rosa Montone, Barbara Cellini
Primary hyperoxaluria type I (PH1) is a rare disease caused by the deficit of liver alanine-glyoxylate aminotransferase (AGT). AGT prevents oxalate formation by converting peroxisomal glyoxylate to glycine. When the enzyme is deficient, progressive calcium oxalate stones deposit first in the urinary tract and then at the systemic level. Pyridoxal 5'-phosphate (PLP), the AGT coenzyme, exerts a chaperone role by promoting dimerization, as demonstrated by studies at protein and cellular level. Thus, variants showing a destabilized dimeric structure should, in principle, be responsive to vitamin B6, a precursor of PLP...
November 6, 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/29101428/composition-of-urinary-calculi-in-infants-a-report-from-an-endemic-country
#4
Mirza Naqi Zafar, Salma Ayub, Hafsa Tanwri, Syed Ali Anwar Naqvi, Syed Adibul Hasan Rizvi
Pediatric urolithiasis remains endemic in low-resource countries where infants constitute 17-40% of all children with urolithiasis. This study reports socio-economic factors, medical history and chemical composition of urinary stones in 976 infants of up to 2 years of age. Between 1992 and 2016, 976 infants presented to our institute with 1038 stones. Chemical composition of stones was analyzed by Fourier transformation infrared spectroscopy (FTIR). The mean age of infants was 19.5 ± 5.74 months with a M:F ratio of 5...
November 3, 2017: Urolithiasis
https://www.readbyqxmd.com/read/29095693/reference-intervals-for-stone-risk-factors-in-24-h-urine-among-healthy-adults-of-the-han-population-in-china
#5
Zanlin Mai, Xiaoxia Li, Zelin Cui, Wenqi Wu, Yongda Liu, Lili Ou, Yueping Liang, Zhijian Zhao, Yang Liu, Xing Mai, Wei Zhu, Tao Zhang, Chao Cai, Houmeng Yang, Guohua Zeng
BACKGROUND: The aim of the study was to establish reference intervals for 24-h urinary stone risk factors in the healthy Chinese Han population. METHODS: From May 2013 to July 2014, we collected and analyzed 24-h urine samples from healthy adult Han population during a cross-sectional study across China. The protocol for analysis of 24-h urine included volume, pH, oxalate, citrate, sodium, potassium, chloride, calcium, phosphorous, creatinine, urate, magnesium, the ion activity products of calcium oxalate (AP(CaOx) indexs) and calcium phosphate (AP(CaP) indexs)...
November 2, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29091707/transcriptional-study-of-hyperoxaluria-and-calcium-oxalate-nephrolithiasis-in-male-rats-inflammatory-changes-are-mainly-associated-with-crystal-deposition
#6
Sunil Joshi, Wei Wang, Saeed R Khan
Hyperoxaluria associated with renal deposition of calcium oxalate (CaOx) crystals causes renal injury and inflammation leading to number of diseases including chronic kidney disease (CKD). It is however, not been possible to separate the renal consequences of hyperoxaluria from that of CaOx crystal deposition. We decided to utilize ethylene glycol (EG) model where hyperoxaluria and CaOx crystal deposition can be separated in time. To test our hypothesis, male rats were made hyperoxaluric by administering EG, rats were euthanized and kidneys were extracted on day 14, when occasional crystal is seen in the kidneys and day 28, when all animals have developed renal CaOx crystal deposits...
2017: PloS One
https://www.readbyqxmd.com/read/29090382/determinants-of-calcium-and-oxalate-excretion-in-subjects-with-calcium-nephrolithiasis-the-role-of-metabolic-syndrome-traits
#7
Andrea Ticinesi, Angela Guerra, Franca Allegri, Antonio Nouvenne, Gianfranco Cervellin, Marcello Maggio, Fulvio Lauretani, Loris Borghi, Tiziana Meschi
BACKGROUND: The association of metabolic syndrome (MetS) traits with urinary calcium (UCE) or oxalate excretion (UOE) is uncertain in calcium stone formers (CSFs). Our aim was to investigate this association in a large group of Caucasian CSFs. METHODS: We retrospectively reviewed data of CSFs evaluated at our Kidney Stone Clinic from 1984 to 2015. Data on body mass index (BMI), MetS traits defined according to international consensus, family history of urolithiasis, anti-hypertensive treatments, calcemia, renal function, and 24-h urinary profile of lithogenic risk were collected...
October 31, 2017: Journal of Nephrology
https://www.readbyqxmd.com/read/29073223/increased-dietary-long-chain-polyunsaturated-fatty-acids-alter-serum-fatty-acid-concentrations-and-lower-risk-of-urine-stone-formation-in-cats
#8
Jean A Hall, Jeff A Brockman, Stephen J Davidson, Jen M MacLeay, Dennis E Jewell
The lifespan of cats with non-obstructive kidney stones is shortened compared with healthy cats indicating a need to reduce stone formation and minimize chronic kidney disease. The purpose of this study was to investigate the effects of increasing dietary polyunsaturated fatty acids (PUFA) on urine characteristics. Domestic-short-hair cats (n = 12; mean age 5.6 years) were randomized into two groups and fed one of two dry-cat foods in a cross-over study design. For one week before study initiation, all cats consumed control food that contained 0...
2017: PloS One
https://www.readbyqxmd.com/read/29063050/management-of-symptomatic-caliceal-diverticular-calculi-minimally-invasive-percutaneous-nephrolithotomy-versus-flexible-ureterorenoscopy
#9
Xiang Ding, Song-Tao Xu, Yu-Hua Huang, Xue-Dong Wei, Jiang-Lei Zhang, Liang-Liang Wang, Jin-Xian Pu, Jian-Quan Hou, Chun-Yin Yan, Feng-Mei Cui
OBJECTIVE: To retrospectively evaluate appropriate treatment for patients with symptomatic caliceal diverticular calculi, by comparing the therapeutic outcomes for those undergoing minimally invasive percutaneous nephrolithotomy (MPCNL) and flexible ureterorenoscopy (F-URS). METHODS: From March 2009 to May 2014, 36 consecutive patients with caliceal diverticular calculi were divided into 2 groups: 21 patients underwent MPCNL, and 15 were treated by F-URS. All procedures were performed by one surgical group, which ensured relatively constant parameters...
December 2016: Chronic Dis Transl Med
https://www.readbyqxmd.com/read/29054323/human-kidney-stone-matrix-latent-potential-to-restrain-com-induced-cytotoxicity-and-inflammatory-response
#10
Shifa Narula, Simran Tandon, Prakash Baligar, Shrawan Kumar Singh, Chanderdeep Tandon
Kidney stone disease is a multi-factorial disorder resulting from the interplay of various risk factors including lifestyle, environment and genetics along with metabolic activities inside the body. However, it is difficult to determine how these factors converge to promote stone disease. Extensive investigations of kidney stone composition at the molecular level have been carried out however; its impact on the complex mechanism of stone formation is still obscure. Hence, an in vitro study was designed to investigate the attenuation of calcium oxalate toxicity by human kidney stone matrix proteins on NRK-52E cells using flowcytometry, Western blotting, RT-PCR and immunofluorescence assays...
October 18, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29034196/protective-effect-of-ethyl-acetate-fraction-of-biophytum-sensitivum-extract-against-sodium-oxalate-induced-urolithiasis-in-rats
#11
Anil T Pawar, Niraj S Vyawahare
The methanolic whole plant extract of Biophytum sensitivum (gǎnyìng cǎo) has been found to possess antiurolithiatic effect. The present study was undertaken to evaluate the antiurolithiatic effect of some fractions of methanolic whole plant extract of B. sensitivum (MBS) in rats as a step toward activity-directed isolation of antiurolithiatic component. The MBS was successively extracted with dichloromethane, ethyl acetate, ethanol and water to obtain fractions. Sodium oxalate (70 mg/kg, i.p.) was administered to rats for seven days to develop calcium oxalate urolithiasis...
October 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/28992903/use-of-purina-pro-plan-veterinary-diet-ur-urinary-st-ox-to-dissolve-struvite-cystoliths
#12
Camille Torres-Henderson, Jamie Bunkers, Elena T Contreras, Emily Cross, Michael R Lappin
The objective of this study was to determine the efficacy of feeding the commercially available diet, Purina Pro Plan Veterinary Diets UR Urinary St/Ox, for the dissolution of struvite cystoliths in cats with naturally occurring disease. Twelve cats with clinical signs of lower urinary tract disease and cystoliths confirmed via radiographs were enrolled. The cats were fed the study diet ad libitum and assessed by abdominal radiographs weekly. Cats with cystoliths that resolved based on radiographs and confirmatory ultrasound examination were considered diet successes...
June 2017: Topics in Companion Animal Medicine
https://www.readbyqxmd.com/read/28975110/nephrolithiasis-as-a-common-urinary-system-manifestation-of-inflammatory-bowel-diseases-a-clinical-review-and-meta-analysis
#13
REVIEW
Mahboube Ganji-Arjenaki, Hamid Nasri, Mahmoud Rafieian-Kopaei
CONTEXT: The extra-intestinal manifestations of inflammatory bowel disease (IBD) are common and involve other organs or systems for example; urinary system. EVIDENCE ACQUISITIONS: For this review, we used a variety of sources by searching through Web of Science, PubMed, EMBASE, Scopus and directory of open access journals (DOAJ). RESULTS: Urinary complications may occur in up to 22% of patients and nephrolithiasis or renal/kidney stones have been suggested to be a common manifestation of disease in forms of uric acid, calcium phosphate or calcium oxalate...
July 2017: Journal of Nephropathology
https://www.readbyqxmd.com/read/28974672/a-non-classical-view-on-calcium-oxalate-precipitation-and-the-role-of-citrate
#14
Encarnación Ruiz-Agudo, Alejandro Burgos-Cara, Cristina Ruiz-Agudo, Aurelia Ibañez-Velasco, Helmut Cölfen, Carlos Rodriguez-Navarro
Although calcium oxalates are relevant biominerals, their formation mechanisms remain largely unresolved. Here, we investigate the early stages of calcium oxalate formation in pure and citrate-bearing solutions. Citrate is used as a well-known oxalate precipitation inhibitor; moreover, it resembles the functional domains of the biomolecules that modulate biomineralization. Our data suggest that calcium oxalate forms after Ca(2+) and C2O4(2-) association into polynuclear stable complexes that aggregate into larger assemblies, from which amorphous calcium oxalate nucleates...
October 3, 2017: Nature Communications
https://www.readbyqxmd.com/read/28966756/preventive-kidney-stones-continue-medical-education
#15
REVIEW
Farahnak Assadi, Mastaneh Moghtaderi
Nephrolithiasis is a common health problem across the globe with a prevalence of 15%-20%. Idiopathic hypercalciuria is the most common cause of nephrolithiasis, and calcium oxalate stones are the most common type of stones in idiopathic hypercalciuric patients. Calcium phosphate stones are frequently associated with other diseases such as renal tubular acidosis type 1, urinary tract infections, and hyperparathyroidism. Compared with flat abdominal film and renal sonography, a noncontrast helical computed tomography scan of the abdomen is the diagnostic procedure of choice for detection of small and radiolucent kidney stones with sensitivity and specificity of nearly 100%...
2017: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28964820/effect-of-stone-size-and-composition-on-ultrasonic-propulsion-ex-vivo
#16
Karmon M Janssen, Timothy C Brand, Michael R Bailey, Bryan W Cunitz, Jonathan D Harper, Mathew D Sorensen, Barbrina Dunmire
OBJECTIVE: To evaluate in more detail the effectiveness of a new designed more efficient ultrasonic propulsion for large stones and specific stone compositions in a tissue phantom model. In the first clinical trial of noninvasive ultrasonic propulsion, urinary stones of unknown compositions and sizes up to 10 mm were successfully repositioned. MATERIAL AND METHODS: The study included 8-12 mm stones of four different primary compositions (calcium oxalate monohydrate, ammonium acid urate, calcium phosphate, and struvite) and a renal calyx phantom consisting of a 12 mm x 30 mm well in a 10 cm block of tissue mimicking material...
September 27, 2017: Urology
https://www.readbyqxmd.com/read/28952687/-mineralogical-composition-of-urinary-stones-risk-factors-and-metabolic-disturbances-in-patients-with-calcium-oxalate-urolithiasis
#17
A V Kustov, A I Strelnikov, M A Moryganov, A O Airapetyan, P R Smirnov, E V Lyalyakina, S R Toms
AIM: To identify the most likely metabolic disturbances and risk factors for stone formation in a group of patients with calcium oxalate urolithiasis, and to establish the relationship between the mineralogical composition of calculi and impaired excretion of inhibitors and promoters of stone formation. MATERIALS AND METHODS: Fifty patients with calcium oxalate urolithiasis were tested using a complex of physicochemical methods. Patients assessment included evaluation of quantitative mineralogical composition of calculi, daily urine pH profile and daily urinary excretion of urates, calcium, magnesium, oxalate, phosphate and citrate ions...
September 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28952007/rapid-kv-switching-single-source-dual-energy-ct-ex-vivo-renal-calculi-characterization-using-a-multiparametric-approach-refining-parameters-on-an-expanded-dataset
#18
J Scott Kriegshauser, Robert G Paden, Miao He, Mitchell R Humphreys, Steven I Zell, Yinlin Fu, Teresa Wu, Mark D Sugi, Alvin C Silva
PURPOSE: We aimed to determine the best algorithms for renal stone composition characterization using rapid kV-switching single-source dual-energy computed tomography (rsDECT) and a multiparametric approach after dataset expansion and refinement of variables. METHODS: rsDECT scans (80 and 140 kVp) were performed on 38 ex vivo 5- to 10-mm renal stones composed of uric acid (UA; n = 21), struvite (STR; n = 5), cystine (CYS; n = 5), and calcium oxalate monohydrate (COM; n = 7)...
September 26, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28951890/the-induction-of-oxalate-metabolism-in-vivo-is-more-effective-with-functional-microbial-communities-than-with-functional-microbial-species
#19
Aaron W Miller, Colin Dale, M Denise Dearing
For mammals, oxalate enters the body through the diet or is endogenously produced by the liver; it is removed by microbial oxalate metabolism in the gut and/or excretion in feces or urine. Deficiencies in any one of the these pathways can lead to complications, such as calcium oxalate urinary stones. While considerable research has been conducted on individual oxalate-degrading bacterial isolates, interactions between oxalate and the gut microbiota as a whole are unknown. We examined the reduction in oxalate excretion in a rat model following oral administration of fecal microbes from a mammalian herbivore adapted to a high oxalate diet or to fecal transplants consisting of two different formulations of mixed oxalate-degrading isolates...
September 2017: MSystems
https://www.readbyqxmd.com/read/28943700/dual-energy-ct-kidney-stone-differentiation-in-photon-counting-computed-tomography
#20
R Gutjahr, C Polster, A Henning, S Kappler, S Leng, C H McCollough, M U Sedlmair, B Schmidt, B Krauss, T G Flohr
This study evaluates the capabilities of a whole-body photon counting CT system to differentiate between four common kidney stone materials, namely uric acid (UA), calcium oxalate monohydrate (COM), cystine (CYS),and apatite (APA) ex vivo. Two different x-ray spectra (120 kV and 140 kV) were applied and two acquisition modes were investigated; The macro-mode generates two energy threshold based image-volumes and two energy bin based image-volumes. In the chesspattern-mode, however, four energy thresholds are applied...
March 2017: Proceedings of SPIE
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