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https://www.readbyqxmd.com/read/29196502/identifying-the-localization-and-exploring-a-functional-role-for-gprc5c-in-the-kidney
#1
Premraj Rajkumar, Boyoung Cha, Jianyi Yin, Lois J Arend, Teodor G Păunescu, Yoshio Hirabayashi, Mark Donowitz, Jennifer L Pluznick
The investigation of orphan GPCRs (GPRs) has the potential to uncover novel insights into whole animal physiology. In this study, our goal was to determine the renal localization of Gprc5c, a receptor that we previously reported to be highly expressed in murine whole kidney, and to examine physiologic parameters in Gprc5c knockout (KO) mice to gain insight into function. Gprc5c localized to the apical membrane of renal proximal tubules (PTs) in mice, rats, and humans. With the comparison of Gprc5c wild-type (WT) and KO mice, we found that Gprc5c KO mice have altered acid-base homeostasis...
December 1, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29193339/a-rapid-t1-mapping-method-for-assessment-of-murine-kidney-viability-using-dynamic-manganese-enhanced-magnetic-resonance-imaging
#2
Kai Jiang, Hui Tang, Prasanna K Mishra, Slobodan I Macura, Lilach O Lerman
PURPOSE: Dynamic manganese-enhanced MRI (MEMRI) allows assessment of tissue viability by tracing manganese uptake. We aimed to develop a rapid T1 mapping method for dynamic MEMRI to facilitate assessments of murine kidney viability. METHODS: A multi-slice saturation recovery fast spin echo (MSRFSE) was developed, validated, and subsequently applied in dynamic MEMRI at 16.4T on ischemic mouse kidneys after 4 weeks of unilateral renal artery stenosis (RAS). Baseline T1 values and post-contrast R1 (1/T1 ) changes were measured in cortex (CO), outer (OSOM), inner (ISOM) strips of outer medulla, and inner medulla (IM)...
November 28, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29191210/new-clues-to-the-nature-of-immunoglobulin-g4-related-disease-a-retrospective-japanese-multicenter-study-of-baseline-clinical-features-of-334-cases
#3
Kazunori Yamada, Motohisa Yamamoto, Takako Saeki, Ichiro Mizushima, Shoko Matsui, Yuhei Fujisawa, Satoshi Hara, Hiroki Takahashi, Hideki Nomura, Shigeyuki Kawa, Mitsuhiro Kawano
BACKGROUND: The aim was to further characterize immunoglobulin G4-related disease (IgG4-RD) by a large-scale multicenter study of its clinical and laboratory features conducted by multidisciplinary physicians of IgG4-RD in Japan. METHODS: Various specialists retrospectively evaluated IgG4-RD patients diagnosed between 1996 and 2015 in five hospitals by analyzing their baseline clinical features, laboratory, imaging, and pathological test findings, and treatment...
December 1, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29181500/perinatal-diagnosis-management-and-follow-up-of-cystic-renal-diseases-a-clinical-practice-recommendation-with-systematic-literature-reviews
#4
Charlotte Gimpel, Fred E Avni, Carsten Bergmann, Metin Cetiner, Sandra Habbig, Dieter Haffner, Jens König, Martin Konrad, Max C Liebau, Lars Pape, Georg Rellensmann, Andrea Titieni, Constantin von Kaisenberg, Stefanie Weber, Paul J D Winyard, Franz Schaefer
Importance: Prenatal and neonatal cystic kidney diseases are a group of rare disorders manifesting as single, multiple unilateral, or bilateral cysts or with increased echogenicity of the renal cortex without macroscopic cysts. They may be accompanied by grossly enlarged kidneys, renal oligohydramnios, pulmonary hypoplasia, extrarenal abnormalities, and neonatal kidney failure. The prognosis is extremely variable from trivial to very severe or even uniformly fatal, which poses significant challenges to prenatal counseling and management...
November 27, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/29158832/clinical-translation-and-first-in-human-use-of-44-sc-sc-psma-617-for-pet-imaging-of-metastasized-castrate-resistant-prostate-cancer
#5
Elisabeth Eppard, Ana de la Fuente, Martina Benešová, Ambreen Khawar, Ralph A Bundschuh, Florian C Gärtner, Barbara Kreppel, Klaus Kopka, Markus Essler, Frank Rösch
BACKGROUND: Various trivalent radiometals are well suited for labeling of DOTA-conjugated variants of Glu-ureido-based prostate-specific membrane antigen (PSMA) inhibitors. The DOTA-conjugate PSMA-617 has proven high potential in PSMA radioligand therapy (PSMA-RLT) of prostate cancer as well as PET imaging when labeled with lutetium-177 and gallium-68 respectively. Considering the relatively short physical half-life of gallium-68 this positron emitter precludes prolonged acquisition periods, as required for pre-therapeutic dosimetry or intraoperative applications...
2017: Theranostics
https://www.readbyqxmd.com/read/29148253/quantification-of-vascular-damage-in-acute-kidney-injury-with-fluorine-magnetic-resonance-imaging-and-spectroscopy
#6
Jeremy K Moore, Junjie Chen, Hua Pan, Joseph P Gaut, Sanjay Jain, Samuel A Wickline
PURPOSE: To design a fluorine MRI/MR spectroscopy approach to quantify renal vascular damage after ischemia-reperfusion injury, and the therapeutic response to antithrombin nanoparticles (NPs) to protect kidney function. METHODS: A total of 53 rats underwent 45 min of bilateral renal artery occlusion and were treated at reperfusion with either plain perfluorocarbon NPs or NPs functionalized with a direct thrombin inhibitor (PPACK:phenyalanine-proline-arginine-chloromethylketone)...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29146695/first-in-human-her2-targeted-imaging-using-89-zr-pertuzumab-pet-ct-dosimetry-and-clinical-application-in-patients-with-breast-cancer
#7
Gary A Ulaner, Serge K Lyashchenko, Christopher Riedl, Shutian Ruan, Pat B Zanzonico, Diana Lake, Komal Jhaveri, Brian Zeglis, Jason S Lewis, Joseph A O'Donoghue
In this first-in-human study, we evaluate the safety and dosimetry of (89)Zr-pertuzumab PET/CT for HER2-targeted imaging in patients with HER2-postive breast cancer. Materials and Methods: Patients with HER2-positive breast cancer and evidence of distant metastases were enrolled in an Institutional Review Board (IRB)-approved prospective clinical trial. Pertuzumab was conjugated with deferoxamine and radiolabeled with (89)Zr. Patients underwent (89)Zr-pertuzumab PET/CT with 74 MBq of (89)Zr-pertuzumab in a total antibody mass of 20-50 mg of pertuzumab...
November 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29134673/modified-dixon-based-renal-dynamic-contrast-enhanced-mri-facilitates-automated-registration-and-perfusion-analysis
#8
Anneloes de Boer, Tim Leiner, Eva E Vink, Peter J Blankestijn, Cornelis A T van den Berg
PURPOSE: Renal dynamic contrast-enhanced (DCE) MRI provides information on renal perfusion and filtration. However, clinical implementation is hampered by challenges in postprocessing as a result of misalignment of the kidneys due to respiration. We propose to perform automated image registration using the fat-only images derived from a modified Dixon reconstruction of a dual-echo acquisition because these provide consistent contrast over the dynamic series. METHODS: DCE data of 10 hypertensive patients was used...
November 13, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29131810/the-role-of-trapped-bubbles-in-kidney-stone-detection-with-the-color-doppler-ultrasound-twinkling-artifact
#9
Julianna C Simon, Oleg A Sapozhnikov, Wayne Kreider, Michael Breshock, James C Williams, Michael R Bailey
The color Doppler ultrasound twinkling artifact, which highlights kidney stones with rapidly changing color, has the potential to improve stone detection; however, its inconsistent appearance has limited its clinical utility. Recently, it was proposed stable crevice bubbles on the kidney stone surface cause twinkling; however, the hypothesis is not fully accepted because the bubbles have not been directly observed. In this paper, the micron or submicron-sized bubbles predicted by the crevice bubble hypothesis are enlarged in kidney stones of five primary compositions by exposure to acoustic rarefaction pulses or hypobaric static pressures in order to simultaneously capture their appearance by high-speed photography and ultrasound imaging...
November 13, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29127451/development-and-validation-of-3d-printed-virtual-models-for-robot-assisted-radical-prostatectomy-and-partial-nephrectomy-urologists-and-patients-perception
#10
Francesco Porpiglia, Riccardo Bertolo, Enrico Checcucci, Daniele Amparore, Riccardo Autorino, Prokar Dasgupta, Peter Wiklund, Ashutosh Tewari, Evangelos Liatsikos, Cristian Fiori
PURPOSE: To test the face and content validity of 3D virtual-rendered printed models used before robot-assisted prostate cancer and nephron-sparing surgery. METHODS: Patients who underwent live surgery during an international urological meeting organized in January 2017 were enrolled. Those with organ-confined prostate cancer underwent robot-assisted radical prostatectomy. Patients with a single renal tumor underwent minimally invasive nephron-sparing surgery. High-resolution (HR) imaging was obtained for all patients...
November 10, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/29124930/dual-internal-standards-with-metals-and-molecules-for-maldi-imaging-of-kidney-lipids
#11
Sarah Ahmed Aboulmagd, Diego Esteban-Fernández, Estefania Moreno-Gordaliza, Boris Neumann, Ahmed H El-Khatib, Alberto Lazaro, Alberto Tejedor, M Milagros Gómez-Gómez, Michael W Linscheid
The quest for internal standards useful in MALDI imaging studies goes on to get not only lateral distribution but also reliable abundance of ions, thus quantitative information. We developed a procedure based on application of matrix and dual internal standards to allow intra- and inter-sample normalization of lipids intensities in kidney sections of control and cisplatin-treated Wistar rats. An inkjet printer was used to deposit a custom-prepared ink with DHB as MALDI matrix, a primary lipids-based internal standard, and a spiked lanthanide as a secondary internal standard...
November 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29104950/-89-zr-cobalamin-pet-tracer-synthesis-cellular-uptake-and-use-for-tumor-imaging
#12
Akhila N W Kuda-Wedagedara, Jayme L Workinger, Ebba Nexo, Robert P Doyle, Nerissa Viola-Villegas
Vitamin B12, or cobalamin (Cbl), is an essential nutrient. Acquisition, transport, and cellular internalization of Cbl are dependent on specific binding proteins and associated receptors. The circulating transport protein transcobalamin (TC) promotes cellular uptake via binding to specific receptors such as CD320, a receptor upregulated in several cancer cell lines. In this study, we report the successful synthesis of (89)Zirconium-labeled Cbl that was derivatized with desferrioxamine ((89)Zr-Cbl). We document the purity of the tracer and its binding to TC compared with that of unmodified cyano-Cbl (CN-Cbl)...
October 31, 2017: ACS Omega
https://www.readbyqxmd.com/read/29042169/percutaneous-cryoablation-of-renal-cell-carcinoma-with-sinus-vein-involvement-based-on-preprocedural-imaging
#13
Thomas D Atwell, A Nicholas Kurup, Stephen A Boorjian, John J Schmitz, R Houston Thompson, Bradley C Leibovich, Grant D Schmit
PURPOSE: To assess feasibility, safety, and oncologic outcomes of cryoablation in treatment of renal cell carcinoma (RCC) with extension into adjacent renal sinus vein. MATERIALS AND METHODS: Review of an internally maintained renal ablation registry identified 7 patients (4 men and 3 women; median age 62 y; age range, 45-91 y) who underwent percutaneous cryoablation of RCC with imaging consistent with extension of tumor into an immediately adjacent renal sinus vein...
October 14, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/29031230/astatine-211-labeled-anti-her2-5f7-single-domain-antibody-fragment-conjugates-radiolabeling-and-preliminary-evaluation
#14
Jaeyeon Choi, Ganesan Vaidyanathan, Eftychia Koumarianou, Choong Mo Kang, Michael R Zalutsky
INTRODUCTION: Derived from heavy chain only camelid antibodies, ~15-kDa single-domain antibody fragments (sdAbs) are an attractive platform for developing molecularly specific imaging probes and targeted radiotherapeutics. The rapid tumor accumulation and normal tissue clearance of sdAbs might be ideal for use with (211)At, a 7.2-h half-life α-emitter, if appropriate labeling chemistry can be devised to trap (211)At in cancer cells after sdAb binding. This study evaluated two reagents, [(211)At]SAGMB and iso-[(211)At]SAGMB, for this purpose...
September 19, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28986933/liquid-tissue-surrogates-for-x-ray-and-ct-phantom-studies
#15
Paul F FitzGerald, Robert E Colborn, Peter M Edic, Jack W Lambert, Peter J Bonitatibus, Benjamin M Yeh
PURPOSE: To develop a simple method for producing liquid-tissue-surrogate (LTS) materials that accurately represent human soft tissues in terms of density and X-ray attenuation coefficient. METHODS AND MATERIALS: We evaluated hypothetical mixtures of water, glycerol, butanol, methanol, sodium chloride, and potassium nitrate; these mixtures were intended to emulate human adipose, blood, brain, kidney, liver, muscle, pancreas, and skin. We compared the hypothetical densities, effective atomic numbers (Zeff ), and calculated discrete-energy CT attenuation (Hounsfield Units (HU)) of the proposed materials with those of human tissue elemental composition as specified in International Commission on Radiation Units (ICRU) Report 46...
October 7, 2017: Medical Physics
https://www.readbyqxmd.com/read/28965904/nephrogenic-systemic-fibrosis-a-survey-of-the-use-of-gadolinium-based-contrast-agents-in-ghana
#16
A D Piersson, P N Gorleku
INTRODUCTION: The aim of this study is to identify current practice of administration of gadolinium-based contrast agents (GBCAs) in Ghana. METHOD: A total of 13 MRI (magnetic resonance imaging) facilities were sent a survey questionnaire to request information on their current practice with the use of GBCAs. RESULTS: Gadodiamide, a high risk GBCA accounted for 67% of first line agents. 5 (42%) had a departmental protocol on the administration of GBCAs with regards to its association with nephrogenic systemic fibrosis (NSF)...
November 2017: Radiography
https://www.readbyqxmd.com/read/28962659/polysplenia-syndrome-with-duodenal-and-pancreatic-dysplasia-in-a-holstein-calf-a-case-report
#17
Daisuke Kondoh, Tomomi Kawano, Tomoaki Kikuchi, Kaoru Hatate, Kenichi Watanabe, Motoki Sasaki, Norio Yamagishi, Hisashi Inokuma, Nobuo Kitamura
BACKGROUND: Laterality disorders of the abdominal organs include situs inversus totalis that mirrors the arrangements of all internal organs and heterotaxy syndrome (situs ambiguus) in which the thoracic or abdominal organs are abnormally arranged. Heterotaxy is often accompanied by multiple congenital malformations, and it generally comprises asplenia and polysplenia syndromes. To our knowledge, polysplenia syndrome has been reported in only three cattle, and computerized tomographic (CT) images of these animals were not obtained...
September 29, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28953210/99mtc-exendin-9-39-octreotide-biokinetics-and-radiation-dosimetry-in-healthy-individuals
#18
Blanca E Ocampo-García, Clara L Santos-Cuevas, Myrna A Luna-Gutiérrez, Eleazar Ignacio-Alvarez, Martha Pedraza-López, Cesar Manzano-Mayoral
AIM: About 90% of insulinomas are benign and 5-15% are malignant. Benign insulinomas express the glucagon-like peptide-1 receptor (GLP-1R, which recognizes exendin-4 and low levels of the somatostatin receptor (SSTR, which recognizes octreotide), whereas malignant insulinomas overexpress SSTR and low levels of GLP-1R. Recently, Lys(Tc-EDDA/HYNIC)-exendin(9-39)/Tc-EDDA/HYNIC-Tyr-octreotide was formulated to detect 100% of insulinomas. The aim of this study was to estimate the biokinetics and dosimetry of Tc-exendin(9-39)/octreotide in four healthy individuals...
November 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28924629/a-psma-ligand-labeled-with-cobalt-55-for-pet-imaging-of-prostate-cancer
#19
Johan Hygum Dam, Birgitte Brinkmann Olsen, Christina Baun, Poul Flemming Høilund-Carlsen, Helge Thisgaard
PURPOSE: Prostate-specific membrane antigen (PSMA) comprises a recognized target for molecular imaging of prostate cancer. As such, radiolabeled PSMA inhibitors are of great value for diagnosis and staging of this disease. Herein, we disclose the preclinical characterization of [(55)Co]PSMA-617 for positron emission tomography (PET)/x-ray computed tomography (CT) imaging of prostate cancer lesions. PROCEDURES: By the application of microwave heating, PSMA-617 in acetate buffer (0...
December 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28921631/validation-of-highly-accelerated-real-time-cardiac-cine-mri-with-radial-k-space-sampling-and-compressed-sensing-in-patients-at-1-5t-and-3t
#20
Hassan Haji-Valizadeh, Amir A Rahsepar, Jeremy D Collins, Elwin Bassett, Tamara Isakova, Tobias Block, Ganesh Adluru, Edward V R DiBella, Daniel C Lee, James C Carr, Daniel Kim
PURPOSE: To validate an optimal 12-fold accelerated real-time cine MRI pulse sequence with radial k-space sampling and compressed sensing (CS) in patients at 1.5T and 3T. METHODS: We used two strategies to reduce image artifacts arising from gradient delays and eddy currents in radial k-space sampling with balanced steady-state free precession readout. We validated this pulse sequence against a standard breath-hold cine sequence in two patient cohorts: a myocardial infarction (n = 16) group at 1...
September 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
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