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https://www.readbyqxmd.com/read/28994595/pertechnetate-induced-addition-of-sulfide-in-small-olefinic-acids-formation-of-tco-dimercaptosuccinate-2-5-and-tco-mercaptosuccinate-2-3-analogues
#1
Kimberly M Reinig, Rachel Seibert, Daniel Velazquez, Jakob Baumeister, Firouzeh Najafi Khosroshahi, Wei Wycoff, Jeff Terry, John E Adams, Carol A Deakyne, Silvia S Jurisson
Technetium-99 ((99)Tc) is important to the nuclear fuel cycle as a long-lived radionuclide produced in ∼6% fission yield from (235)U or (239)Pu. In its most common chemical form, namely, pertechnetate ((99)TcO4(-)), it is environmentally mobile. In situ hydrogen sulfide reduction of pertechnetate has been proposed as a potential method to immobilize environmental (99)TcO4(-) that has entered the environment. Reactions of (99)TcO4(-) with sulfide in solution result in the precipitation of Tc2S7 except when olefinic acids, specifically fumaric or maleic acid, are present; a water-soluble (99)Tc species forms...
October 10, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28984254/yield-of-imaging-performed-as-per-indian-society-of-pediatric-nephrology-guidelines-in-children-with-urinary-tract-infection
#2
Rajiv Sinha, Devdeep Mukherjee, Jayati Sengupta, Subhasis Saha, Sushmita Banerjee
OBJECTIVE: To assess yield of imaging performed as per Indian Society of Pediatric Nephrology (ISPN) urinary tract infection (UTI) guideline. METHODS: Ultrasonography (USG), voiding cystourethrography (VCUG) and dimercaptosuccinic-acid (DMSA) scintigraphy were performed in 183 children (age 0-5y) with first episode (age 0-1y) of UTI or recurrent (age <5y) UTI, as per ISPN recommendations. RESULTS: Significant abnormalities were detected in 110 (63%), with vesicoureteric reflux (VUR) grades 3-5 in 31% and renal scars in 43%...
September 15, 2017: Indian Pediatrics
https://www.readbyqxmd.com/read/28982546/what-did-we-find-from-imaging-studies-in-childhood-uti-and-which-studies-are-mandatory
#3
Prayong Vachvanichsanong, Pornsak Dissaneewate, Edward McNeil
OBJECTIVE: To evaluate the imaging results of childhood UTI in our setting, and examine if it would be appropriate to apply the recent guideline changes regarding imaging studies as routine practice in Thailand. METHODS: Medical records of UTI children aged 0-15 years were reviewed, with focus on renal ultrasound (RUS), cystogram and (99mTc)dimercaptosuccinic acid (DMSA) renal scan results to determine congenital anomalies of the kidney and urinary tract (CAKUT) and renal damage...
October 2, 2017: Urology
https://www.readbyqxmd.com/read/28981712/patient-specific-dosimetry-for-pediatric-imaging-of-99mtc-dimercaptosuccinic-acid-with-gate-monte-carlo-code
#4
Mahmoud Bagheri, Ali Asghar Parach, Seid Kazem Razavi-Ratki, Reza Nafisi-Moghadam, Mohammad Ali Jelodari
In this study, radiation absorbed dose of 99mTc-dimercaptosuccinic acid (DMSA) in critical organs was calculated using Monte Carlo simulation. Ten child patients with genitourinary abnormalities were imaged using a series of planar, SPECT and MRI, after injection with 99mTc-DMSA. Patient-specific organ segmentation was performed on MRI and used as input in GATE. Organs with substantial uptake included kidneys, bladder and liver. The mean organ absorbed dose coefficients (mGy/MBq) were 0.063, 0.058, 0.018, 0...
August 5, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28979776/usefulness-of-99m-tc-dimercaptosuccinic-acid-renal-scan-in-the-diagnosis-and-follow-up-of-acute-tubulointerstitial-nephritis-in-children
#5
Enrico Vidal, Elisabetta Miorin, Pietro Zucchetta, Elisa Benetti, Germana Longo, Davide Meneghesso, Mattia Parolin, Luisa Murer
BACKGROUND: Symptoms and signs of acute tubulointerstitial nephritis (ATIN) are nonspecific; therefore, renal biopsy is often necessary to clarify the diagnosis. The aim of this study was to evaluate the use of (99m)Tc-dimercaptosuccinic acid (DMSA) scintigraphy in the diagnosis and follow-up of ATIN. METHODS: We retrospectively reviewed the charts of five patients (nine renal units) with a median age of 14 years who underwent DMSA scan after a clinical and/or biopsy-proven diagnosis of ATIN...
October 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28965578/synthesis-and-characterization-of-new-1-hydroxy-2-pyridinethione-derivatives-their-lead-complexes-and-efficacy-in-the-treatment-of-acute-lead-poisoning-in-rats
#6
Manal H Al Khabbas, Samah A Ata, Kamal I Abu-Dari, Maha F Tutunji, Mohammad S Mubarak
A number of new mono- and dihydroxypyridinethione ligands have been synthesized via reaction of dimethylamine and amino acid esters with the active amide obtained from the reaction of 1-hydroxy-2-pyridinethione-4-carboxylic acid (1) and 1,1'-carbonyldiimidazole in DMF. Moreover, the lead complexes of these new ligands were also prepared. Structures of the newly synthesized compounds have been confirmed by different spectroscopic methods such as IR, (1)H NMR, and (13)C NMR, and by elemental analysis. The effect of these synthesized ligands on the excretion of lead, iron, and zinc, and their distribution in kidneys, liver, and bones in acutely intoxicated rats was investigated and results, for lead, were compared with those of the known drug meso-2,3-dimercaptosuccinic acid (DMSA)...
December 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28899359/transcript-profiling-of-the-immunological-interactions-between-actinobacillus-pleuropneumoniae-serotype-7-and-the-host-by-dual-rna-seq
#7
Ping Li, Zhiwen Xu, Xiangang Sun, Yue Yin, Yi Fan, Jun Zhao, Xiyu Mao, Jianbo Huang, Fan Yang, Ling Zhu
BACKGROUND: The complexity of the pathogenic mechanism underlying the host immune response to Actinobacillus pleuropneumonia (App) makes the use of preventive measures difficult, and a more global view of the host-pathogen interactions and new insights into this process are urgently needed to reveal the pathogenic and immune mechanisms underlying App infection. Here, we infected specific pathogen-free Mus musculus with App serotype 7 by intranasal inoculation to construct an acute hemorrhagic pneumonia infection model and isolated the infected lungs for analysis of the interactions by dual RNA-seq...
September 12, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28798828/dimercaptosuccinic-acid-scintigraphy-vs-ultrasound-for-renal-parenchymal-defects-in-children
#8
Maryse Marceau-Grimard, Audrey Marion, Christian Côté, Stephane Bolduc, Marcel Dumont, Katherine Moore
INTRODUCTION: Dimercaptosuccinic acid (DMSA) scintigraphy is the gold standard in the evaluation of renal parenchymal defects and is widely used in the pediatric population. As more recent ultrasound equipment was purchased at our tertiary pediatric centre, our objective was to evaluate if renal ultrasound (US) results are equivalent or sufficient when compared to DMSA scintigraphy in the assessment of renal anomalies. METHODS: The charts of all 463 patients who underwent DMSA scintigraphy between January 2009 and May 2014 at our pediatric tertiary centre were reviewed...
August 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28793929/shifts-in-coastal-sediment-oxygenation-cause-pronounced-changes-in-microbial-community-composition-and-associated-metabolism
#9
Elias Broman, Johanna Sjöstedt, Jarone Pinhassi, Mark Dopson
BACKGROUND: A key characteristic of eutrophication in coastal seas is the expansion of hypoxic bottom waters, often referred to as 'dead zones'. One proposed remediation strategy for coastal dead zones in the Baltic Sea is to mix the water column using pump stations, circulating oxygenated water to the sea bottom. Although microbial metabolism in the sediment surface is recognized as key in regulating bulk chemical fluxes, it remains unknown how the microbial community and its metabolic processes are influenced by shifts in oxygen availability...
August 9, 2017: Microbiome
https://www.readbyqxmd.com/read/28781122/dosimetry-of-99m-tc-dtpa-dmsa-and-mag3-used-in-renal-function-studies-of-newborns-and-children
#10
Marcial Vásquez Arteaga, Víctor Murillo Caballero, Kelman Marín Rengifo
The dose to kidneys of newborns and 1-year old children was calculated using the MIRD methodology. In order to perform renal studies radiopharmaceutical like (99m)Tc-DTPA, (99m) Tc-MAG3 and (99m)Tc-DMSA are used. Here, besides the anatomic and structure information of kidneys another data are provided in benefit of patient, however during the radioisotope decay emitted radiations delivers, totally or partially, their energy. Therefore is important to estimate the internal radiation dose of the organs. The largest dose to kidneys comes from the self-dose and it is due to the charged particles emitted during (99m)Tc decay...
July 28, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28779895/whole-cell-bioreporters-and-risk-assessment-of-environmental-pollution-a-proof-of-concept-study-using-lead
#11
Xiaokai Zhang, Boqiang Qin, Jianming Deng, Mona Wells
As the world burden of environmental contamination increases, it is of the utmost importance to develop streamlined approaches to environmental risk assessment in order to prioritize mitigation measures. Whole-cell biosensors or bioreporters and speciation modeling have both become of increasing interest to determine the bioavailability of pollutants, as bioavailability is increasingly in use as an indicator of risk. Herein, we examine whether bioreporter results are able to reflect expectations based on chemical reactivity and speciation modeling, with the hope to extend the research into a wider framework of risk assessment...
October 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28716390/impact-of-cytokine-genetic-polymorphisms-on-the-risk-of-renal-parenchymal-infection-in-children
#12
Almontaser Hussein, Eman Askar, Ahlam Badawy, Khaled Saad, Asmaa Zahran, Ahmad A Elderwy
BACKGROUND: Acute pyelonephritis is associated with renal scarring in up to 30% of patients. Renal scarring may cause significant long-term morbidity. The pathogenesis of acute pyelonephritis remains unclear, although it involves interaction among uroepithelium, the immune system cells, and the locally produced cytokines. That some UTI-prone children develop acute pyelonephritis, and eventually renal parenchymal scarring, suggests a genetic role. Interleukin-6, interleukin-8, chemokine receptor-1 (CXCR1), and tumor necrosis factor-alpha (TNFα), the key regulators of the host immune responses, are proteins whose secretion is controlled by genes...
July 3, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28711547/interobserver-variability-for-interpretation-of-dmsa-scans-in-the-rivur-trial
#13
Tej K Mattoo, Steven J Skoog, Lisa Gravens-Mueller, Russell W Chesney, Alejandro Hoberman, Ranjiv Mathews, Marva Moxey-Mims, Anastasia Ivanova, Saul P Greenfield, Myra A Carpenter
INTRODUCTION: Technetium-99m dimercaptosuccinic acid (DMSA) renal scans are used in the diagnosis of renal scarring. In the Randomized Intervention for Children with Vesicoureteral Reflux (RIVUR) trial that randomized 607 children, DMSA renal scans were used for evaluating the presence and the severity of renal scarring. OBJECTIVE: The aim was to determine interobserver variability in reporting of DMSA renal scans in the RIVUR trial. STUDY DESIGN: We compared DMSA renal scan reports for renal scarring and acute pyelonephritis from all non-reference local radiologists (ALRs) at study sites with adjudicated as well as non-adjudicated reports from two reference radiologists (RRs) of the RIVUR trial...
June 1, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28689965/ph-and-nir-light-responsive-magnetic-iron-oxide-nanoparticles-for-mitochondria-mediated-apoptotic-cell-death-induced-by-chemo-photothermal-therapy
#14
Yunok Oh, Jae-Young Je, Madhappan Santha Moorthy, Hansoo Seo, Won Ho Cho
Recently, various therapeutic strategies in anticancer drug development are focused to reduce adverse side effects and to enhance the therapeutic efficacy. Mostly, the iron oxide (Fe3O4) nanoparticles have widely been utilized as an efficient drug delivery system towing to their unique properties such as excellent magnetic behavior, considerably low toxicity, easy surface modification and high drug-loading efficacy. In the present study, we synthesized a multifunctional, DMSA coated, water soluble Fe3O4 nanoparticles (Fe3O4@DMSA/DOX) for an effective pH and NIR-light triggered delivery of anticancer drug (DOX) in cancer therapy...
July 6, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28681079/urinary-tract-infection-in-small-children-the-evolution-of-renal-damage-over-time
#15
Svante Swerkersson, Ulf Jodal, Rune Sixt, Eira Stokland, Sverker Hansson
BACKGROUND: Our objective was to analyze the evolution of kidney damage over time in small children with urinary tract infection (UTI) and factors associated with progression of renal damage. METHODS: From a cohort of 1003 children <2 years of age with first-time UTI, a retrospective analysis of 103 children was done. Children were selected because of renal damage at index (99m)Tc-dimercaptosuccinic acid (DMSA) scintigraphy at least 3 months after UTI, and a late DMSA scan was performed after at least 2 years...
July 5, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28657753/complete-ag4m2-dmsa-4-m-ni-pd-pt-dmsa-dimercaptosuccinic-acid-cluster-series-optical-properties-stability-and-structural-characterization
#16
Scott R Biltek, Arthur C Reber, Shiv N Khanna, Ayusman Sen
The cluster series Ag4M2(DMSA)4 (M = Ni, Pd, Pt) has been synthesized and the optical spectra and stability have been examined as a function of the metal, M. We have also obtained the structure of Ag4Ni2(DMSA)4 using X-ray crystallography, confirming the previously calculated structure. In the optical spectrum, there is a significant blue shift as the substituted metal M progresses down the periodic table. Theoretical calculations suggest that the blue shift is due to the lowering in energy of the d orbitals of the transition metal, M; however the expected metal-metal excitations are optically weak, and the spectra are dominated by metal-ligand excitations...
July 10, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28650887/a-pediatric-case-of-well-functioning-supernumerary-kidney-relative-renal-function-assessment-using-radionuclide-imaging
#17
Milena Pizzoferro, Cristina Lo Zupone, Mario De Gennaro, Maria Felicia Villani, Maria Carmen Garganese
We present an interesting image of a well-functioning supernumerary kidney evaluated with DMSA (dimercaptosuccinic acid) renal scintigraphy in a 14-year-old girl. At 2 years of age, the patient had a diagnosis of supernumerary kidney. She remained asymptomatic up to childhood age, and then a DMSA study was required to guide the following adequate surveillance strategy. DMSA study provided a clear imaging of supernumerary kidney in the left side of the abdomen showing a regular uptake and a normal function in relation to its own size...
September 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28648300/the-effects-of-2-3-dimercapto-1-propanesulfonic-acid-dmps-and-meso-2-3-dimercaptosuccinic-acid-dmsa-on-the-nephrotoxicity-in-the-mouse-during-repeated-cisplatin-cddp-treatments
#18
Y Yajima, M Kawaguchi, M Yoshikawa, M Okubo, E Tsukagoshi, K Sato, A Katakura
Previously, we reported that specific lower dose of sodium 2,3-dimercapto-1-propanesulfonic acid (DMPS) which is an antidote to heavy metal intoxication, inversely enhanced cisplatin (CDDP)-induced antitumor activity to S-180 cell-bearing mouse. This activity was only weak with meso-2,3-dimercaptosuccinic acid (DMSA), however. This study investigated the effects of lower doses of DMPS or DMSA on the nephrotoxicity and kinetics of CDDP. Kidney and blood isolated from female mice which received CDDP with or without DMPS or DMSA once daily for 4 days were provided for measuring levels of blood urea nitrogen (BUN) and transporter proteins (OCT2: organic cation transporter; MATE1: multidrug and toxin extrusion) mRNA, and CDDP-originated platinum, and TUNEL staining of renal tubular cells...
June 3, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28637056/-urosepsis-in-children
#19
Josef Oswald
Urinary tract infections (UTI) are the most common infectious diseases in children. Urosepsis in childhood, though rare, is the most complicated possible variant. In newborns and infants, unspecific symptoms are a significant barrier to a fast and reliable diagnosis, which is crucial to successful treatment. In addition to urine and laboratory tests as well as non-invasive examinations (ultrasound), there may be an indication for invasive examinations of the kidneys (DMSA scans) in cases of a severe infection...
September 2017: Aktuelle Urologie
https://www.readbyqxmd.com/read/28612056/critical-appraisal-of-the-top-down-approach-for-vesicoureteral-reflux
#20
REVIEW
Ahmed Abdelhalim, Antoine E Khoury
Vesicoureteral reflux (VUR) has been linked to recurrent urinary tract infections (UTIs), renal scarring, hypertension, renal insufficiency and end-stage kidney disease. Different imaging strategies have been proposed to approach children presenting with UTI to sort out patients with significant VUR while minimizing patient morbidity, radiation exposure and financial burden. None of these imaging strategies is universally accepted. The"top-down approach" (TDA) aims at restricting the number of voiding cystourethrograms (VCUGs) and its associated morbidity while identifying patients with clinically-significant reflux...
June 2017: Investigative and Clinical Urology
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