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https://www.readbyqxmd.com/read/28549111/diabetic-db-db-mice-do-not-develop-heart-failure-upon-pressure-overload-a-longitudinal-in-vivo-pet-mri-and-mrs-study-on-cardiac-metabolic-structural-and-functional-adaptations
#1
Desiree Abdurrachim, Miranda Nabben, Verena Hoerr, Michael T Kuhlmann, Philipp Bovenkamp, Jolita Ciapaite, Ilvy M E Geraets, Will Coumans, Joost J F P Luiken, Jan F C Glatz, Michael Schäfers, Klaas Nicolay, Cornelius Faber, Sven Hermann, Jeanine J Prompers
Aim: Heart failure is associated with altered myocardial substrate metabolism and impaired cardiac energetics. Comorbidities like diabetes may influence the metabolic adaptations during heart failure development. We quantified to what extent changes in substrate preference, lipid accumulation, and energy status predict the longitudinal development of hypertrophy and failure in the non-diabetic and the diabetic heart. Methods and results: Transverse aortic constriction (TAC) was performed in non-diabetic ( db /+) and diabetic ( db/db ) mice to induce pressure overload...
May 26, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28548849/de-risking-the-cu-mediated-18f-fluorination-of-heterocyclic-pet-radioligands
#2
Nicholas Taylor, Enrico Emer, Sean Preshlock, Michael Schedler, Matthew Tredwell, Stefan Verhoog, Joël Mercier, Christophe Genicot, Veronique Emilie Gouverneur
Molecules labeled with fluorine 18 (18F) are used in positron emission tomography to visualize, characterize and measure biological processes in the body. Despite recent advances in the incorporation of 18F onto arenes, the development of general and efficient approaches to label radioligands necessary for drug discovery programs remains a significant task. This full account describes a de-risking approach towards the radiosynthesis of heterocyclic PET radioligands using the copper-mediated 18F fluorination of aryl boron reagents with 18F-fluoride as a model reaction...
May 26, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28548372/initial-multicentre-experience-of-68-gallium-psma-pet-ct-guided-robot-assisted-salvage-lymphadenectomy-acceptable-safety-profile-but-oncological-benefit-appears-limited
#3
Amila Siriwardana, James Thompson, Pim J van Leeuwen, Shaela Doig, Anton Kalsbeek, Louise Emmett, Warick Delprado, David Wong, Hemamali Samaratunga, Anne-Maree Haynes, Geoff Coughlin, Phillip Stricker
OBJECTIVES: To evaluate the safety and short-term oncological outcomes for (68) Ga-PSMA PET/CT directed robot-assisted salvage node dissection (RASND) for prostate cancer oligometastatic nodal recurrence. MATERIALS AND METHODS: Between February 2014 and April 2016, 35 patients across two centres underwent RASND for (68) Ga-PSMA PET/CT detected oligometastatic nodal recurrence. RASND was performed by targeted pelvic dissection, unilateral extended pelvic template or bilateral extended pelvic template dissection, depending on previous pelvic treatment and extent/location of nodal disease...
May 26, 2017: BJU International
https://www.readbyqxmd.com/read/28547728/the-protective-effect-of-a-novel-antioxidant-gene-from-mycobacterium-avium-against-nitrosative-and-oxidative-stress-in-e-coli
#4
Shiyi He, Aiyan Wang, Xueping Ning, Dongjun Yang, Min Ling
The production of reactive oxygen intermediates (ROI) and reactive nitrogen intermediates (RNI) is an important host defense mechanism in response to infection by Mycobacterium tuberculosis. A variety of genes have been implicated in resistance to ROI and RNI, including noxR1. However, studies in Mycobacterium avium, an important pathogen among nontuberculous mycobacteria, are limited. We aim to investigate the role of a novel gene cloned from M. avium with high similarity to noxR1, noA, in resistance against RNI and ROI in M...
June 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28547178/clinical-impact-of-pet-ct-imaging-after-adjuvant-therapy-in-patients-with-oral-cavity-squamous-cell-carcinoma
#5
Huan-Chun Lin, Chung-Jan Kang, Shiang-Fu Huang, Hung-Ming Wang, Chien-Yu Lin, Li-Yu Lee, Chun-Ta Liao, Tzu-Chen Yen
PURPOSE: This single-center retrospective study of prospectively collected data was aimed at comparing the clinical outcomes of positron emission tomography/computed tomography (PET/CT) for patients with oral cavity squamous cell carcinoma (OSCC) with symptomatic recurrences identified by PET/CT imaging following adjuvant therapy (Group A) versus those of cases with asymptomatic recurrences diagnosed through periodic post-adjuvant therapy PET/CT surveillance (Group B). We also sought to establish the priority of salvage therapy in the two study groups...
May 26, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28547177/guideline-for-pet-ct-imaging-of-neuroendocrine-neoplasms-with-68-ga-dota-conjugated-somatostatin-receptor-targeting-peptides-and-18-f-dopa
#6
Murat Fani Bozkurt, Irene Virgolini, Sona Balogova, Mohsen Beheshti, Domenico Rubello, Clemens Decristoforo, Valentina Ambrosini, Andreas Kjaer, Roberto Delgado-Bolton, Jolanta Kunikowska, Wim J G Oyen, Arturo Chiti, Francesco Giammarile, Stefano Fanti
PURPOSE & METHODS: Neuroendocrine neoplasms are a heterogenous group of tumours, for which nuclear medicine plays an important role in the diagnostic work-up as well as in the targeted therapeutic options. This guideline is aimed to assist nuclear medicine physicians in recommending, performing, reporting and interpreting the results of somatostatin receptor (SSTR) PET/CT imaging using (68)Ga-DOTA-conjugated peptides, as well as (18)F-DOPA imaging for various neuroendocrine neoplasms...
May 25, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28547176/metabolic-volume-performs-better-than-suvmax-in-the-detection-of-left-ventricular-assist-device-driveline-infection
#7
Nemanja Avramovic, Angelo Maria Dell'Aquila, Matthias Weckesser, Danka Milankovic, Alexis Vrachimis, Jürgen R Sindermann, Christian Wenning
PURPOSE: A continuous-flow left ventricular assist device (LVAD) is a new and highly promising therapy in supporting end-stage heart failure patients, either bridging them to heart transplantation or as a destination therapy. Infection is one of the major complications associated with LVAD implants. (18)F-FDG PET/CT has already been shown to be useful in the detection of LVAD infection. The goal of this study was to compare the diagnostic accuracy of different PET analysis techniques (visual grading versus SUVmax and metabolic volume)...
May 25, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28547129/quantitative-analysis-of-dynamic-18-f-fdg-pet-ct-for-measurement-of-lung-inflammation
#8
Christopher Coello, Marie Fisk, Divya Mohan, Frederick J Wilson, Andrew P Brown, Michael I Polkey, Ian Wilkinson, Ruth Tal-Singer, Philip S Murphy, Joseph Cheriyan, Roger N Gunn
BACKGROUND: An inflammatory reaction in the airways and lung parenchyma, comprised mainly of neutrophils and alveolar macrophages, is present in some patients with chronic obstructive pulmonary disease (COPD). Thoracic fluorodeoxyglucose ((18)F-FDG) positron emission tomography (PET) has been proposed as a promising imaging biomarker to assess this inflammation. We sought to introduce a fully quantitative analysis method and compare this with previously published studies based on the Patlak approach using a dataset comprising (18)F-FDG PET scans from COPD subjects with elevated circulating inflammatory markers (fibrinogen) and matched healthy volunteers (HV)...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28546782/neoadjuvant-ifosfamide-and-epirubicin-in-the-treatment-of-malignant-peripheral-nerve-sheath-tumors
#9
Angela C Hirbe, Pippa F Cosper, Sonika Dahiya, Brian A Van Tine
Background and Objectives. Malignant peripheral nerve sheath tumors (MPNSTs) are aggressive soft tissue sarcomas with poor overall survival. Response to chemotherapy has been debated for these tumors. Methods. We performed a retrospective analysis of the patients at our institution with a biopsy-proven diagnosis of MPNST that underwent neoadjuvant chemotherapy prior to surgery. Results. We retrospectively identified five patients who received neoadjuvant chemotherapy with epirubicin and ifosfamide that demonstrated a 30% reduction in tumor growth and a 60% response rate by RECIST criteria...
2017: Sarcoma
https://www.readbyqxmd.com/read/28546337/pet-guided-evaluation-and-optimization-of-internalized-antibody-drug-conjugates-targeting-erythropoietin-producing-hepatoma-a2-receptor
#10
Orit Jacobson, Haojun Chen, Gang Niu, Dale O Kiesewetter, Qing Li, Gengcheng Yang, Kimberly Cook, Lan Xu, William Dall'Acqua, Ping Tsui, Li Peng, Xiaoyuan Chen
The erythropoietin producing hepatoma A2 receptor (EphA2) is a tyrosine kinase overexpressed by tumor stroma and cancer cells. High expression level of EphA2 predicts poor prognosis, correlating with disease progression and metastasis. Therefore, EphA2 is a relevant therapeutic target for human cancer. Antibodies, selectively bound to EphA2 receptor, can induce rapid receptor phosphorylation that results in antibody internalization and degradation. This internalization mechanism has been exploited with the development of antibody-drug conjugates (ADC) for cancer chemotherapy...
May 25, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28546336/the-value-of-18-f-fdg-pet-ct-in-diagnosis-and-during-follow-up-in-273-patients-with-chronic-q-fever
#11
Ilse Kouijzer, Linda Kampschreur, Peter Wever, Corneline Hoekstra, Marjo van Kasteren, Monique de Jager-Leclercq, Marrigje Nabuurs-Franssen, Marjolijn Wegdam-Blans, Heidi Ammerlaan, Jacqueline Buijs, Lioe-Fee de Geus-Oei, Wim Oyen, Chantal Bleeker-Rovers
In 1-5% of all acute Q fever infections, chronic Q fever develops, mostly manifesting as endocarditis, infected aneurysms, or infected vascular prostheses. In this study, we investigated the diagnostic value of (18)F-fluorodeoxyglucose positron emission tomography/computed tomography ((18)F-FDG-PET/CT) in chronic Q fever at diagnosis and during follow-up. Methods: All Dutch adult patients suspected of chronic Q fever who were diagnosed since 2007 were retrospectively included until March 2015 when at least one (18)F-FDG-PET/CT was performed...
May 25, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28546334/motion-corrected-imaging-of-the-aortic-valve-with-18-f-naf-pet-ct-and-pet-mr-a-feasibility-study
#12
Mhairi Katrina Doris, Mathieu Rubeaux, Tania Pawade, Yuka Otaki, Yibin Xie, Debiao Li, Balaji K Tamarappoo, David Newby, Daniel S Berman, Marc R Dweck, Piotr J Slomka, Damini Dey
Introduction: We investigated whether motion correction of gated (18)F-fluoride PET-CT and PET-MR of the aortic valve could improve PET quantitation and image quality. Methods: A diffeomorphic, mass-preserving, anatomy-guided registration algorithm was used to align PET images from 4 cardiac gates, preserving all counts, and applied to PET-MR and PET-CT data of six patients with aortic stenosis. Measured Signal-to-Noise Ratios (SNRs) and Target-to-Background Ratios (TBRs) were compared with the standard method of utilizing only the diastolic gate...
May 25, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28546332/establishing-177-lu-psma-617-radioligand-therapy-in-a-syngeneic-model-of-murine-prostate-cancer
#13
Wolfgang P Fendler, Andreea D Stuparu, Susan Evans-Axelsson, Katharina Lückerath, Liu Wei, Woosuk Kim, Soumya Poddar, Jonathan Said, Caius G Radu, Matthias Eiber, Johannes Czernin, Roger Slavik, Ken Herrmann
Clinical (177)Lu-PSMA-617 radioligand therapy (RLT) is applied in advanced stage prostate cancer. However, to the best of our knowledge murine models to study the biological effects of various activity levels have not been established. AIM: To optimize specific and total activity for (177)Lu-PSMA-617 RLT in a syngeneic model of murine prostate cancer. Methods: 0.1x106 murine reconstituted, oncogene-driven prostate cancer cells (RM1), transduced to express human prostate-specific membrane antigen (PSMA), were injected into the left flank of C57Bl6 immunocompetent mice...
May 25, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28546331/evaluation-of-dual-time-point-imaging-18-f-fdg-pet-ct-for-lymph-node-staging-in-vulvar-cancer
#14
Angela Collarino, Giorgia Garganese, Renato A Valdés Olmos, Antonella Stefanelli, Germano Perotti, Paoletta Mirk, Simona M Fragomeni, Francesco P Ieria, Giovanni Scambia, Alessandro Giordano, Vittoria Rufini
This study aimed to assess the value of dual time point (DTP) (18)F-FDG-PET/CT in the prediction of lymph node (LN) status in patients with invasive vulvar cancer (VC) scheduled for inguinofemoral lymph node dissection (IFLD). Methods: From April 2013 to July 2015, all consecutive patients with VC scheduled for IFLD were prospectively enrolled. All patients underwent a preoperative whole-body (18)F-FDG-PET/CT scan at 1-hour (standard exam) and an additional scan from T11 to the groins at 3-hour (delayed exam) after (18)F-FDG injection...
May 25, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28546330/exploring-new-multimodal-quantitative-imaging-indices-for-the-assessment-of-osseous-tumour-burden-in-prostate-cancer-using-68-ga-psma-pet-ct
#15
Marie Bieth, Markus Krönke, Robert Tauber, Marielena Dahlbender, Margitta Retz, Stephan G Nekolla, Bjoern Menze, Tobias Maurer, Matthias Eiber, Markus Schwaiger
Positron-emission-tomography (PET) combined with computed-tomography (CT) and prostate-specific-membrane-antigen (PSMA) ligands has gained significant interest for staging prostate cancer (PC). In this study, we propose two multimodal quantitative indices as imaging biomarker for the assessment of osseous tumour burden using (68)Ga-PSMA-PET/CT and present preliminary clinical data. We define two Bone-PET-Indices (BPI) that incorporate anatomical information from CT and functional information from (68)Ga-PSMA-PET: BPIVOL is the percental bone volume affected by tumour...
May 25, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28545932/the-association-between-tau-pet-and-retrospective-cortical-thinning-in-clinically-normal-elderly
#16
Molly R LaPoint, Jasmeer P Chhatwal, Jorge Sepulcre, Keith A Johnson, Reisa A Sperling, Aaron P Schultz
Tau pathology has been associated with neuronal loss at autopsy, but the temporal evolution of tau pathology and atrophy remains unclear. Here, we investigate the association between cross-sectional AV-1451-PET as a marker of tau pathology and cortical thickness cross-sectionally. We also investigated retrospective rates of cortical thinning over the three years preceding the AV-1451 scan in a clinically normal cohort of 103 older adults from the Harvard Aging Brain Study. Tau measurements were Geometric Transfer Matrix partial volume corrected standardized uptake value ratios (SUVRs) with a cerebellar grey reference region...
May 22, 2017: NeuroImage
https://www.readbyqxmd.com/read/28545900/environmental-contamination-with-toxocara-spp-eggs-in-public-parks-and-playground-sandpits-of-greater-lisbon-portugal
#17
David Otero, Ana Margarida Alho, Rolf Nijsse, Jeroen Roelfsema, Paul Overgaauw, Luís Madeira de Carvalho
Toxocarosis is a zoonotic parasitic disease transmitted from companion animals to humans. Environmental contamination with Toxocara eggs is considered to be the main source of human infections. In Portugal, knowledge regarding the current situation, including density, distribution and environmental contamination by Toxocara spp., is largely unknown. The present study investigated environmental contamination with Toxocara spp. eggs, in soil and faecal samples collected from public parks and playground sandpits in Greater Lisbon, Portugal...
May 22, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28545563/additional-value-of-18-f-fdg-pet-ct-response-evaluation-in-axillary-nodes-during-neoadjuvant-therapy-for-triple-negative-and-her2-positive-breast-cancer
#18
Mette S van Ramshorst, Suzana C Teixeira, Bas B Koolen, Kenneth E Pengel, Kenneth G Gilhuijs, Jelle Wesseling, Sjoerd Rodenhuis, Renato A Valdés Olmos, Emiel J Rutgers, Wouter V Vogel, Gabe S Sonke, Marie-Jeanne T Vrancken Peeters
BACKGROUND: (18)F-FDG PET/CT can monitor metabolic activity in early breast cancer during neoadjuvant systemic therapy (NST), but it is unknown if the metabolic breast and axillary response differ. We evaluated the correlation between metabolic breast and axillary response at various time points during NST. Furthermore, we analysed if the combined metabolic response improves pathologic complete response (pCR) prediction compared to using the metabolic breast response alone. METHODS: (18)F-FDG PET/CT was performed at baseline (PET1), 2-3 weeks (PET2), and 6-8 weeks (PET3) of NST in patients with triple-negative (TN) and HER2-positive node-positive breast cancer...
May 25, 2017: Cancer Imaging: the Official Publication of the International Cancer Imaging Society
https://www.readbyqxmd.com/read/28545366/role-of-positron-emission-tomography-for-central-nervous-system-involvement-in-systemic-autoimmune-diseases-status-and-perspectives
#19
Daniele Mauro, Gaetano Barbagallo, Salvatore D'Angelo, Sannino Pasqualina, Saverio Naty, Caterina Bruno, Ignazio Olivieri, Rosa Daniela Grembiale, Francesco Ursini
In the last years, an increasing interest in molecular imaging has been raised by the extending potential of positron emission tomography (PET). The role of PET imaging, originally confined to the oncology setting, is continuously extending thanks to the development of novel radiopharmaceutical and to the implementation of hybrid imaging techniques, where PET scans are combined with computed tomography (CT) or magnetic resonance imaging(MRI) in order to improve spatial resolution. Early preclinical studies suggested that 18F-FDG PET can detect neuroinflammation; new developing radiopharmaceuticals targeting more specifically inflammation-related molecules are moving in this direction...
May 23, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28545084/feasibility-study-of-tspo-quantification-with-18f-feppa-using-population-based-input-function
#20
Rostom Mabrouk, Antonio P Strafella, Dunja Knezevic, Christine Ghadery, Romina Mizrahi, Avideh Gharehgazlou, Yuko Koshimori, Sylvain Houle, Pablo Rusjan
PURPOSE: The input function (IF) is a core element in the quantification of Translocator protein 18 kDa with positron emission tomography (PET), as no suitable reference region with negligible binding has been identified. Arterial blood sampling is indeed needed to create the IF (ASIF). In the present manuscript we study individualization of a population based input function (PBIF) with a single arterial manual sample to estimate total distribution volume (VT) for [18F]FEPPA and to replicate previously published clinical studies in which the ASIF was used...
2017: PloS One
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