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https://www.readbyqxmd.com/read/28716390/impact-of-cytokine-genetic-polymorphisms-on-the-risk-of-renal-parenchymal-infection-in-children
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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...
June 24, 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
#7
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
#8
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...
June 21, 2017: Aktuelle Urologie
https://www.readbyqxmd.com/read/28612056/critical-appraisal-of-the-top-down-approach-for-vesicoureteral-reflux
#9
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
https://www.readbyqxmd.com/read/28605996/in-vitro-exposure-of-bull-sperm-cells-to-dmsa-coated-maghemite-nanoparticles-does-not-affect-cell-functionality-or-structure
#10
Denise Ferreira Caldeira, Fernanda Paulini, Renata Carvalho Silva, Ricardo Bentes de Azevedo, Carolina Madeira Lucci
Magnetic nanoparticles can be used in different areas of biology. It is therefore important to know the effects of such nanomaterials on germline cells as they may traverse the blood-testis barrier. This work aimed to evaluate the response of bull sperm after exposure to a magnetic fluid containing DMSA-coated maghemite nanoparticles (MNP-DMSA) in order to determine nanotoxicity. Bull sperm was incubated with MNP-DMSA at final concentrations of 0.06, 0.03 or 0.015 mg Fe/mL. Sperm kinetics, plasma membrane integrity and acrosome reaction were evaluated over a four-hour incubation period...
June 12, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28555450/usefulness-of-parametric-renal-clearance-images-in-the-assessment-of-basic-risk-factors-for-renalnal-clearance-images-in-the-assessment-of-basic-risk-factors-for-renal-scarring-in-children-with-recurrent-urinary-tract-infections
#11
Ewa Pietrzak-Stelasiak, Małgorzata Bieńkiewicz, Wojciech Woźnicki, Krystyna Bubińska, Magdalena Kowalewska-Pietrzak, Anna Płachcińska, Jacek Kuśmierek
BACKGROUND: Clinically confirmed incidents of acute pyelonephritis (APN) following recurrent infections of urinary tract (UTI) form basic risk factors for renal scarring in children. Vesico-uretheral reflux (VUR) of higher grade is additional risk factor for this scarring. Opinions on diagnostic value of summed sequential images of renal uptake phase (SUM) of dynamic renal scintigraphy in detection of renal scars are diverse. However, several publications point to higher diagnostic efficacy of clearance parametric images (PAR) generated from this study...
2017: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/28533635/tc-99m-ethylenedicysteine-and-tc-99m-dimercaptosuccinic-acid-scintigraphy-comparison-of-the-two-for-detection-of-scarring-and-differential-cortical-function
#12
Anitha Dharmalingam, Shwetal U Pawar, Sandesh V Parelkar, Suruchi S Shetye, Mangala K Ghorpade, Gundu H Tilve
CONTEXT: The differential cortical function obtained by Tc-99m EC is comparable to that of Tc-99m DMSA. However, identification of scars on Tc-99m EC images needs to be studied. AIMS: The aim of the study is to evaluate role of Tc-99m EC for detection of scarring and differential cortical function by comparing with Tc-99m DMSA. SETTINGS AND DESIGN: Prospective observational study of recurrent UTI; minimum 6 weeks after acute episode; when urine examination is negative for pus cells...
April 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28509132/transient-fanconi-syndrome-in-two-preterm-infants-with-hydronephrosis-and-urinary-tract-infection
#13
Takahiro Tominaga, Takeshi Sato, Yosuke Ichihashi, Naoko Amano, Yasuaki Kobayashi, Midori Awazu
Type IV renal tubular acidosis is known to occur in obstructive uropathy with urinary tract infection. Fanconi syndrome, however, has not been described in these settings. We report two preterm infants who developed Fanconi syndrome associated with hydronephrosis and urinary tract infection. Patient 1 is a boy with 21 trisomy, bilateral renal hypoplasia and bilateral vesicoureteral reflux delivered at 35 weeks' gestation. At postnatal day 42, he developed Fanconi syndrome after urinary tract infection, which persisted until the surgical correction of vesicoureteral reflux...
May 2017: CEN Case Reports
https://www.readbyqxmd.com/read/28488726/prediction-of-renal-cortical-defect-and-scar-using-neutrophil-to-lymphocyte-ratio-in-children-with-febrile-urinary-tract-infection
#14
Jeong Won Lee, Joon Soo Park, Kyeong Bae Park, Gyeong Hee Yoo, Seung Soo Kim, Sang Mi Lee
AIM: This study is aimed to evaluate the predictive value of the neutrophil-to-lymphocyte ratio (NLR) for cortical defect on initial and follow-up Tc-99m dimercaptosuccinic acid (DMSA) scan in children with the first febrile urinary tract infection (UTI). METHODS: We retrospectively enrolled 179 children with the first febrile UTI who underwent DMSA scan and laboratory tests. In patients with abnormal DMSA scan findings, follow-up DMSA scan was performed at least 6 months after the initial scan...
May 10, 2017: Nuklearmedizin. Nuclear Medicine
https://www.readbyqxmd.com/read/28484294/interobserver-variability-in-interpretation-of-planar-and-spect-tc-99m-dmsa-renal-scintigraphy-in-children
#15
Nermina Beslic, Renata Milardovic, Amera Sadija, Lejla Dzananovic, Semra Cavaljuga
OBJECTIVE: This study objective was to evaluate interobserver agreement between individual pairs of three nuclear medicine physicians in interpretation of renal cortical scintigraphy in children with respect to the mode of acquisition (planar vs. SPECT), diagnoses and kidney site (left vs. right). MATERIALS AND METHODS: Thirty children were imaged in planar and SPECT mode per protocol upon the injection of Tc-99m DMSA dose adjusted to their body weight. Patients were classified according to diagnoses into four groups...
March 2017: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/28477320/controversies-regarding-management-of-vesico-ureteric-reflux
#16
Ramesh Babu, Sujit Chowdhary
The primary goal in the management of a child with urinary tract infection (UTI) is to prevent recurrence of UTI and acquired renal damage. Approximately 15% of children develop renal scarring after a first episode of febrile UTI. Vesico-ureteric reflux (VUR) is diagnosed in 30-40% of children imaged after first febrile UTI. The 'top-down' approach involving ultrasound and dimercaptosuccinic acid scan (DMSA) first after an appropriate interval following UTI, can help in avoiding voiding cystourethrogram (VCUG), an invasive test with higher radiation exposure...
July 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28466457/comparison-of-99mtc-dmsa-renal-scintigraphy-with-biochemical-and-histopathological-findings-in-animal-models-of-acute-kidney-injury
#17
Hossein Fatemikia, Mohammad Seyedabadi, Zynab Karimi, Kiarash Tanha, Majid Assadi, Kaveh Tanha
Biochemical and histological assays are currently used for the diagnosis and characterization of kidney injury. The purpose of this study was to compare technetium-99m-labeled dimercaptosuccinic acid ((99m)Tc-DMSA) renal scintigraphy, as a non-invasive method, with common biochemical and histopathological methods in two animal models of acute kidney injury. Nephrotoxicity was induced either by gentamicin (100 mg/kg/day for one week) or unilateral ureteral ligation (UUO). Renal scintigraphy was performed 1 h after intravenous injection of 99mTc-DMSA (3 mCi)...
May 2, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28458233/raman-and-drift-spectra-vibrational-assignments-and-quantum-mechanical-calculations-of-centrosymmetric-meso-2-3-dimercaptosuccinic-acid
#18
Ibrahim A Shaaban, Abdalla Karoyo, Lee D Wilson, Tarek A Mohamed
The Raman spectrum (3700-100cm(-1)) of meso-2,3-Dimercaptosuccinic acid (meso-DMSA; C4H6O4S2) was recorded in the solid phase using 514.5 and 785nm excitation lines. Whereas, the DRIFT spectrum (4000-400cm(-1)) of the sample powdered in KBr was obtained. Moreover, DFT-B3LYP/6-31G(d) geometry optimization and frequency calculations were carried out for centrosymmetric trans (Ci), gauche (C1; G(+)/G(-)) and eclipsed (Cs; Ef and C1; E(+)/E(-)) rotational isomers in favor of a trans conformation, the least energy with real frequencies...
April 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28453880/predicting-postnatal-renal-function-of-prenatally-detected-posterior-urethral-valves-using-fetal-diffusion-weighted-magnetic-resonance-imaging-with-apparent-diffusion-coefficient-determination
#19
Alice Faure, Nicoleta Panait, Michel Panuel, Pierre Alessandrini, Claude D'Ercole, Kathia Chaumoitre, Thierry Merrot
OBJECTIVE: The objective of this study was to evaluate the accuracy of fetal diffusion-weighted magnetic resonance imaging with apparent diffusion coefficient (ADC) determination to predict postnatal renal function (nadir creatinine at 1 year and eGFR) of men with posterior urethral valves (PUV). METHODS: Between 2003 and 2014, 11 MRI were performed on fetuses (between 28 and 32 weeks) in whom second trimester sonography suggested severe bilateral urinary tract anomalies, suspected of PUV...
April 28, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28417852/nuclear-medicine-in-pediatric-nephro-urology-an-overview
#20
REVIEW
Iosif Mendichovszky, Bernardita Troncoso Solar, Naima Smeulders, Marina Easty, Lorenzo Biassoni
In the context of ante-natally diagnosed hydronephrosis, the vast majority of children with a dilated renal pelvis do not need any surgical treatment, as the dilatation resolves spontaneously with time. Slow drainage demonstrated at Tc-99m-mercaptoacetyltriglycine (MAG3) renography does not necessarily mean obstruction. Obstruction is defined as resistance to urinary outflow with urinary stasis at the level of the pelvic-ureteric junction (PUJ) which, if left untreated, will damage the kidney. Unfortunately this definition is retrospective and not clinically helpful...
May 2017: Seminars in Nuclear Medicine
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