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https://www.readbyqxmd.com/read/28335193/facile-synthesis-of-gd-functionalized-gold-nanoclusters-as-potential-mri-ct-contrast-agents
#1
Wenjun Le, Shaobin Cui, Xin Chen, Huanhuan Zhu, Bingdi Chen, Zheng Cui
Multi-modal imaging plays a key role in the earlier detection of disease. In this work, a facile bioinspired method was developed to synthesize Gd-functionalized gold nanoclusters (Gd-Au NCs). The Gd-Au NCs exhibit a uniform size, with an average size of 5.6 nm in dynamic light scattering (DLS), which is a bit bigger than gold clusters (3.74 nm, DLS), while the fluorescent properties of Gd-Au NCs are almost the same as that of Au NCs. Moreover, the Gd-Au NCs exhibit a high longitudinal relaxivity value (r1) of 22...
April 9, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334940/aav9-delivered-bispecific-nanobody-attenuates-amyloid-burden-in-the-gelsolin-amyloidosis-mouse-model
#2
Adriaan Verhelle, Nisha Nair, Inge Everaert, Wouter Van Overbeke, Lynn Supply, Olivier Zwaenepoel, Cindy Peleman, Jo Van Dorpe, Tony Lahoutte, Nick Devoogdt, Wim Derave, Marinee K Chuah, Thierry Vanden Driessche, Jan Gettemans
Gelsolin amyloidosis is a dominantly inherited, incurable type of amyloidosis. A single point mutation in the gelsolin gene (G654A is most common) results in the loss of a Ca2+  binding site in the second gelsolin domain. Consequently, this domain partly unfolds and exposes an otherwise buried furin cleavage site at the surface. During secretion of mutant plasma gelsolin consecutive cleavage by furin and MT1-MMP results in the production of 8 and 5 kDa amyloidogenic peptides. Nanobodies that are able to (partly) inhibit furin or MT1-MMP proteolysis have previously been reported...
February 21, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28333011/utility-of-deep-inspiration-breath-hold-for-left-sided-breast-radiation-therapy-in-preventing-early-cardiac-perfusion-defects-a-prospective-study
#3
Timothy M Zagar, Orit Kaidar-Person, Xiaoli Tang, Ellen E Jones, Jason Matney, Shiva K Das, Rebecca L Green, Arif Sheikh, Amir H Khandani, William H McCartney, Jorge Daniel Oldan, Terence Z Wong, Lawrence B Marks
PURPOSE: To evaluate early cardiac single photon computed tomography (SPECT) findings after left breast/chest wall postoperative radiation therapy (RT) in the setting of deep inspiration breath hold (DIBH). METHODS AND MATERIALS: We performed a prospective single-institution single-arm study of patients who were planned for tangential RT with DIBH to the left breast/chest wall (± internal mammary nodes). The DIBH was done by use of a controlled surface monitoring technique (AlignRT, Vision RT Ltd, London, UK)...
April 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28332488/parkinson-disease
#4
REVIEW
Werner Poewe, Klaus Seppi, Caroline M Tanner, Glenda M Halliday, Patrik Brundin, Jens Volkmann, Anette-Eleonore Schrag, Anthony E Lang
Parkinson disease is the second-most common neurodegenerative disorder that affects 2-3% of the population ≥65 years of age. Neuronal loss in the substantia nigra, which causes striatal dopamine deficiency, and intracellular inclusions containing aggregates of α-synuclein are the neuropathological hallmarks of Parkinson disease. Multiple other cell types throughout the central and peripheral autonomic nervous system are also involved, probably from early disease onwards. Although clinical diagnosis relies on the presence of bradykinesia and other cardinal motor features, Parkinson disease is associated with many non-motor symptoms that add to overall disability...
March 23, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28327190/primary-pain-generator-identification-by-ct-spect-in-a-patient-with-low-back-pain-a-case-report
#5
Gabriel Tender, Adriana Constantinescu, Andrew Conger, Anthony DiGiorgio
BACKGROUND: Chronic low back pain is one of the most common conditions encountered in the middle-age population. Identifying the primary pain generator is notoriously difficult. The computed tomography-single-photon emission computed tomography (CT-SPECT) is emerging as a new diagnostic modality for this purpose. CASE PRESENTATION: This 68-year-old Caucasian male presented with intractable low back pain refractory to maximal conservative treatment, including medication and extensive physical therapy...
March 21, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28320195/combined-use-of-dopamine-transporter-imaging-dat-spect-and-123-i-metaiodobenzylguanidine-mibg-myocardial-scintigraphy-for-diagnosing-parkinson-s-disease
#6
Fumihito Yoshii, Masafuchi Ryo, Yasuhiko Baba, Takashi Koide, Jun Hashimoto
BACKGROUND: To examine whether combined use of (123)I-FP-CIT dopamine transporter single photon emission computed tomography (DAT-SPECT) and (123)I-MIBG myocardial scintigraphy (MIBG) is superior to either modality alone for diagnosing Parkinson's disease (PD). METHODS: Patients with probable PD (n=120) who underwent both DAT-SPECT and MIBG myocardial scintigraphy within short intervals were enrolled. Specific binding ratio (SBR) of DAT-SPECT images and heart-to-mediastinum (H/M) ratio of MIBG images were used as quantitative measures...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319503/myocardial-infarction-in-a-patient-with-hypertrophic-cardiomyopathy-but-normal-coronary-arteries
#7
Shuheng Li, Xiaoxin Sun, Zongyao Zhang, Zuo-Xiang He
A 57-year-old man with a history of hypertrophic cardiomyopathy diagnosed by echocardiography experienced atypical chest pain and dyspnea for 6 months. A rest Tc-MIBI myocardial SPECT imaging and a F-FDG myocardial PET/CT imaging were performed, which showed multiple matched myocardial perfusion/metabolism defects in the left ventricle, indicating scar tissue. Surprisingly, subsequent contrast coronary angiography revealed no significant coronary artery stenosis.
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28315799/venous-phase-timing-does-not-predict-spect-results-during-balloon-test-occlusion-of-the-internal-carotid-artery
#8
Brian M Snelling, Samir Sur, Sumedh S Shah, Racheal I Wolfson, Sudheer Ambekar, Dileep R Yavagal, Mohamed S Elhammady, Eric C Peterson
INTRODUCTION: The purpose of this study is to evaluate the role of venous phase timing when compared to Technetium-99m Single Photon Emission Computed Tomography (SPECT) during angiographic balloon test occlusion of the internal carotid artery (ICA) and subsequent sacrifice of the ICA. METHODS: Fifty-six patients underwent formal BTO from April 2008, to February 2014, at our institution. Venous phase timing was calculated for each patient. SPECT imaging for each patient was interpreted by the nuclear medicine radiologist...
March 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28315063/the-effect-of-regadenoson-on-the-integrity-of-the-human-blood-brain-barrier-a-pilot-study
#9
Sadhana Jackson, Richard T George, Martin A Lodge, Anna Piotrowski, Richard L Wahl, Sachin K Gujar, Stuart A Grossman
Regadenoson is an FDA approved adenosine receptor agonist which increases blood-brain barrier (BBB) permeability in rodents. Regadenoson is used clinically for pharmacologic cardiac stress testing using SPECT or CT imaging agents that do not cross an intact BBB. This study was conducted to determine if standard doses of regadenoson transiently disrupt the human BBB allowing higher concentrations of systemically administered imaging agents to enter the brain. Patients without known intracranial disease undergoing clinically indicated pharmacologic cardiac stress tests were eligible for this study...
March 17, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28303474/respiratory-motion-reduction-with-a-dual-gating-approach-in-myocardial-perfusion-spect-effect-on-left-ventricular-functional-parameters
#10
Matti J Kortelainen, Tuomas M Koivumäki, Marko J Vauhkonen, Marja K Hedman, Satu T J Kärkkäinen, Juanita Niño Quintero, Mikko A Hakulinen
BACKGROUND: Respiratory motion (RM) complicates the analysis of myocardial perfusion (MP) single-photon emission computed tomography (SPECT) images. The effects of RM on left ventricular (LV) functional variables have not been thoroughly investigated. METHODS AND RESULTS: Thoracic electrical bioimpedance and electrocardiographic signals were recorded from eighteen patients undergoing the rest phase of a 1-day stress/rest cardiac-gated MP-SPECT examination. The signals and list-mode emission data were retrospectively processed to yield standard cardiac- and dual-gated (respiratory and cardiac gating) image sets applying a novel algorithm...
March 16, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28302763/phase-2-study-of-99m-tc-trofolastat-spect-ct-to-identify-and-localize-prostate-cancer-in-intermediate-and-high-risk-patients-undergoing-radical-prostatectomy-and-extended-pelvic-lymph-node-dissection
#11
Karolien E Goffin, Steven Joniau, Peter Tenke, Kevin Slawin, Eric A Klein, Nancy Stambler, Thomas Strack, John Babich, Thomas Armor, Vivien Wong
Rationale:(99m)Tc-trofolastat ((99m)Tc-MIP-1404), a small-molecule inhibitor of prostate-specific membrane antigen (PSMA), shows high potential to detect prostate cancer (PCa) non-invasively using single-photon-emission-computed-tomography (SPECT). We therefore wanted to assess the performance of (99m)Tc-trofolastat SPECT/CT in a phase 2 multi-center, multi-reader prospective study in patients with intermediate- and high-grade PCa, prior to radical prostatectomy and extended pelvic lymph node dissection, with histopathology as gold standard...
March 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28302758/atlas-of-spect-ct
#12
E Edmund Kim
No abstract text is available yet for this article.
March 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28302035/translational-multimodality-neuroimaging
#13
Sushil K Sharma
Recently high-resolution, noninvasive, multimodality in-vivo molecular imaging with PET, SPECT, CT and MRI, employing fusion algorithms has revolutionized personalized medicine. However, specific radiopharmaceuticals (RPs) for the accurate diagnosis and effective treatment of progressive neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, drug addiction, and other cognitive impairments still remain in developmental phase. Currently, multimodality fusion neuroimaging is utilized for the determination of: pharmacokinetics and pre-clinical development of radiopharmaceuticals (RPs); in-vivo monitoring of stem cell transplantation therapy; nicotinic acetylcholine receptors (nAChRs) investigations; and regional cerebral blood flow and glucose metabolism in cognitively-impaired subjects employing noninvasive microPET and nano-SPECT imaging...
March 15, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28301261/a-radiolabeled-fully-human-antibody-to-human-aspartyl-asparaginyl-%C3%AE-hydroxylase-is-a-promising-agent-for-imaging-and-therapy-of-metastatic-breast-cancer
#14
Ekaterina Revskaya, Zewei Jiang, Alfred Morgenstern, Frank Bruchertseifer, Muctarr Sesay, Susan Walker, Steven Fuller, Michael S Lebowitz, Claudia Gravekamp, Hossein A Ghanbari, Ekaterina Dadachova
There is a need for novel effective and safe therapies for metastatic breast cancer based on targeting tumor-specific molecular markers of cancer. Human aspartyl (asparaginyl) β-hydroxylase (HAAH) is a highly conserved enzyme that hydroxylates epidermal growth factor-like domains in transformation-associated proteins and is overexpressed in a variety of cancers, including breast cancer. A fully human monoclonal antibody (mAb) PAN-622 has been developed to HAAH. In this study, they describe the development of PAN-622 mAb as an agent for imaging and radioimmunotherapy of metastatic breast cancer...
March 2017: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28301223/antitumor-effect-of-nanoparticle-131-i-labeled-arginine-glycine-aspartate-bovine-serum-albumin-polycaprolactone-in-lung-cancer
#15
Hui Ming, Lei Fang, Jingmei Gao, Chengxia Li, Yanhui Ji, Yiming Shen, Yiming Hu, Ning Li, Jin Chang, Wei Li, Jian Tan
OBJECTIVE: The aim of the present study is to investigate the biologic effects of internal irradiation and the therapeutic effectiveness of (131)I-labeled arginine-glycine-aspartate (RGD)-bovine serum albumin (BSA)-polycaprolactone (PCL) ((131)I-RGD-BSA-PCL) in murine lung cancer models. MATERIALS AND METHODS: The target binding and cellular uptake of NCI-H460 lung cancer cells overexpressing integrin αvβ3 were observed by confocal microscopy. Flow cytometry was used to assay apoptosis...
March 16, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28294159/to-find-a-better-dosimetric-parameter-in-the-predicting-of-radiation-induced-lung-toxicity-individually-ventilation-perfusion-or-ct-based
#16
Lin-Lin Xiao, Guoren Yang, Jinhu Chen, Xiaohui Wang, Qingwei Wu, Zongwei Huo, Qingxi Yu, Jinming Yu, Shuanghu Yuan
This study aimed to find a better dosimetric parameter in predicting of radiation-induced lung toxicity (RILT) in patients with non-small cell lung cancer (NSCLC) individually: ventilation(V), perfusion (Q) or computerized tomography (CT) based. V/Q single-photon emission computerized tomography (SPECT) was performed within 1 week prior to radiotherapy (RT). All V/Q imaging data was integrated into RT planning system, generating functional parameters based on V/Q SPECT. Fifty-seven NSCLC patients were enrolled in this prospective study...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28291381/selimetry-a-multicentre-i-131-dosimetry-trial-a-clinical-perspective
#17
Jonathan Wadsley, Rebecca Gregory, Glenn Flux, Kate Newbold, Yong Du, Laura Moss, Andrew Hall, Louise Flanagan, Sarah R Brown
Treatment options for patients with thyroid cancer that is no longer sensitive to iodine therapy are limited. Those treatments which currently exist are associated with significant toxicity. The SELIMETRY trial (EudraCT No 2015-002269-47) aims to investigate the role of the MEK inhibitor Selumetinib in re-sensitising advanced iodine refractory differentiated thyroid cancer to radioiodine therapy. Patients deemed to have sufficient iodine uptake in previously iodine refractory lesions after 4 weeks of Selumetinib therapy will be given an empirical activity of 5...
March 14, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28291009/a-family-with-von-hippel-lindau-syndrome-the-findings-of-indium-111-somatostatin-receptor-scintigraphy-iodine-123-metaiodobenzylguanidine-scintigraphy-and-single-photon-emission-computerized-tomography
#18
Pelin Arıcan, Berna Okudan Tekin, Seniha Naldöken, Rıza Şefizade, Dilek Berker
Von Hippel-Lindau syndrome (VHLS) is an autosomal dominant hereditary familial disorder characterized by development of malignant and benign neoplasms. Differential diagnosis of the adrenal and pancreatic masses are difficult in patients with VHLS. Iodine-123 metaiodobenzylguanidine (I-123 MIBG) and indium-111 somatostatin receptor scintigraphies (In-111 SRS) have important roles in the differential diagnosis of adrenal and pancreatic masses in those patients. In this case report, we present the findings of I-123 MIBG single-photon emission computerized tomography (SPECT/CT) and In-111 SRS SPECT/CT in three members of a family with VHLS...
February 5, 2017: Molecular Imaging and Radionuclide Therapy
https://www.readbyqxmd.com/read/28289629/neurocognitive-dysfunction-according-to-hypoperfusion-territory-in-patients-with-moyamoya-disease
#19
Chang Gu Kang, Min Ho Chun, Jung-A Kang, Kyung Hee Do, Su Jin Choi
OBJECTIVE: To demonstrate the prevalence of cerebral hypoperfusion without focal cerebral lesions in patients with Moyamoya disease (MMD), and the relationship between areas of hypoperfusion and cognitive impairment. METHODS: Twenty-six MMD patients were included. Patients were categorized according to the presence/absence of hypoperfusion in the frontal, parietal, temporal, and occipital lobes on brain single-photon-emission computed tomography (SPECT) after acetazolamide challenge...
February 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28288044/the-accessory-sacroiliac-joint-diagnosed-with-bone-spect-ct
#20
Ji-Hun Kang, Min-Woo Kim, Eun Ha Moon, Young Jun Kim, Ki Pi Yu
The accessory sacroiliac (SI) joint is not rare and can be one of the causes of lower back pain. We present a case of a 35-year-old woman with chronic lower back pain. Conventional radiography was equivocal, and bone scintigraphy showed a focus of mildly increased uptake in left SI joint region. SPECT/CT revealed increased uptakes in the accessory articulations between both sacral alae and iliac bones, and confirmed the diagnosis of accessory SI joint. This case illustrates the SPECT/CT findings of the accessory SI joint...
March 10, 2017: Clinical Nuclear Medicine
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