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https://www.readbyqxmd.com/read/28627754/labeling-and-magnetic-resonance-imaging-of-exosomes-isolated-from-adipose-stem-cells
#1
Alice Busato, Roberta Bonafede, Pietro Bontempi, Ilaria Scambi, Lorenzo Schiaffino, Donatella Benati, Manuela Malatesta, Andrea Sbarbati, Pasquina Marzola, Raffaella Mariotti
Adipose stem cells (ASC) represent a promising therapeutic approach for neurodegenerative diseases. Most biological effects of ASC are probably mediated by extracellular vesicles, such as exosomes, which influence the surrounding cells. Current development of exosome therapies requires efficient and noninvasive methods to localize, monitor, and track the exosomes. Among imaging methods used for this purpose, magnetic resonance imaging (MRI) has advantages: high spatial resolution, rapid in vivo acquisition, and radiation-free operation...
June 19, 2017: Current Protocols in Cell Biology
https://www.readbyqxmd.com/read/28463893/imaging-pathobiology-of-carotid-atherosclerosis-with-ultrasmall-superparamagnetic-particles-of-iron-oxide-an-update
#2
Umar Sadat, Ammara Usman, Jonathan H Gillard
PURPOSE OF REVIEW: To provide brief overview of the developments regarding use of ultrasmall superparamagnetic particles of iron oxide in imaging pathobiology of carotid atherosclerosis. RECENT FINDINGS: MRI is a promising technique capable of providing morphological and functional information about atheromatous plaques. MRI using iron oxide particles, called ultrasmall superparamagnetic iron oxide (USPIO) particles, allows detection of macrophages in atherosclerotic tissue...
July 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28462154/an-explanatory-case-on-the-limitations-of-lymph-node-staging-in-recurrent-prostate-cancer
#3
Marco Bandini, Giorgio Gandaglia, Nicola Fossati, Francesco Montorsi, Alberto Briganti
We describe the case of a 54-year-old man with nodal recurrence prostate cancer after radical prostatectomy, salvage external-beam radiotherapy and salvage lymph node dissection. The patient was evaluated with a lymphotropic ultrasmall superparamagnetic particles of iron oxide (USPIO)-MRI and a (68)Ga radiolabelled prostate specific membrane antigen (Ga68-PSMA) PET-CT scan which enhanced persistent localized nodal disease. The patient was then considered for a second robot-assisted extended S-LND. Differently from preoperative imaging, pathology report revealed a wide nodal involvement mirroring a metastatic disease...
May 2017: Urology Case Reports
https://www.readbyqxmd.com/read/28448604/non-invasive-imaging-assessment-of-the-biodistribution-of-gsk2849330-an-adcc-and-cdc-optimized-anti-her3-mab-and-its-role-in-tumor-macrophage-recruitment-in-human-tumor-bearing-mice
#4
Hasan Alsaid, Tinamarie Skedzielewski, Mary V Rambo, Kristen Hunsinger, Bao Hoang, William Fieles, Edward R Long, James Tunstead, Danielle J Vugts, Matthew Cleveland, Neil Clarke, Christopher Matheny, Beat M Jucker
The purpose of this work was to use various molecular imaging techniques to non-invasively assess GSK2849330 (anti HER3 ADCC and CDC enhanced 'AccretaMab' monoclonal antibody) pharmacokinetics and pharmacodynamics in human xenograft tumor-bearing mice. Immuno-PET biodistribution imaging of radiolabeled 89Zr-GSK2849330 was assessed in mice with HER3 negative (MIA-PaCa-2) and positive (CHL-1) human xenograft tumors. Dose dependency of GSK2849330 disposition was assessed using varying doses of unlabeled GSK2849330 co-injected with 89Zr-GSK2849330...
2017: PloS One
https://www.readbyqxmd.com/read/28411307/ferumoxytol-is-not-retained-in-kidney-allografts-in-patients-undergoing-acute-rejection
#5
Maryam Aghighi, Laura Pisani, Ashok J Theruvath, Anne M Muehe, Jessica Donig, Ramsha Khan, Samantha J Holdsworth, Neeraja Kambham, Waldo Concepcion, Paul C Grimm, Heike E Daldrup-Link
PURPOSE: To evaluate whether ultrasmall superparamagnetic iron oxide nanoparticle (USPIO)-enhanced magnetic resonance imaging (MRI) can detect allograft rejection in pediatric kidney transplant patients. PROCEDURES: The USPIO ferumoxytol has a long blood half-life and is phagocytosed by macrophages. In an IRB-approved single-center prospective clinical trial, 26 pediatric patients and adolescents (age 10-26 years) with acute allograft rejection (n = 5), non-rejecting allografts (n = 13), and normal native kidneys (n = 8) underwent multi-echo T2* fast spoiled gradient-echo (FSPGR) MRI after intravenous injection (p...
April 14, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28396958/the-function-and-magnetic-resonance-imaging-of-immature-dendritic-cells-under-ultrasmall-superparamagnetic-iron-oxide-uspio-labeling
#6
Wei Zhang, Shuihua Zhang, Wan Xu, Min Zhang, Quan Zhou, Wenli Chen
OBJECTIVE: To investigate the effects of ultrasmall superparamagnetic iron oxide (USPIO) labeling on the maturity or immune tolerance of immature dendritic cells (imDCs) as the success of immunotherapy with immature dendritic cells is highly dependent on immune tolerance. RESULTS: The feasibility of tracking implanted USPIO-labeled imDCs in vivo by magnetic resonance imaging (MRI) was explored. The effects of USPIO labeling on the immune tolerance of imDCs was examined...
April 10, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28327075/magnetic-nanobubbles-with-potential-for-targeted-drug-delivery-and-trimodal-imaging-in-breast-cancer-an-in-vitro-study
#7
Weixiang Song, Yindeng Luo, Yajing Zhao, Xinjie Liu, Jiannong Zhao, Jie Luo, Qunxia Zhang, Haitao Ran, Zhigang Wang, Dajing Guo
AIM: The aim of this study was to improve tumor-targeted therapy for breast cancer by designing magnetic nanobubbles with the potential for targeted drug delivery and multimodal imaging. MATERIALS & METHODS: Herceptin-decorated and ultrasmall superparamagnetic iron oxide (USPIO)/paclitaxel (PTX)-embedded nanobubbles (PTX-USPIO-HER-NBs) were manufactured by combining a modified double-emulsion evaporation process with carbodiimide technique. PTX-USPIO-HER-NBs were examined for characterization, specific cell-targeting ability and multimodal imaging...
May 2017: Nanomedicine
https://www.readbyqxmd.com/read/28220818/labeling-adipose-derived-stem-cell-sheet-by-ultrasmall-super-paramagnetic-fe3o4-nanoparticles-and-magnetic-resonance-tracking-in-vivo
#8
Shukui Zhou, Ting Yin, Qingsong Zou, Kaile Zhang, Guo Gao, Joseph G Shapter, Peng Huang, Qiang Fu
Cell sheet therapy has emerged as a potential therapeutic option for reparation and reconstruction of damaged tissues and organs. However, an effective means to assess the fate and distribution of transplanted cell sheets in a serial and noninvasive manner is still lacking. To investigate the feasibility of tracking Adipose derived stem cells (ADSCs) sheet in vivo using ultrasmall super-paramagnetic Fe3O4 nanoparticles (USPIO), canine ADSCs were cultured and incubated with USPIO and 0.75 μg/ml Poly-L-Lysine (PLL) for 12 h...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28176853/quantifying-tumor-associated-macrophages-in-breast-cancer-a-comparison-of-iron-and-fluorine-based-mri-cell-tracking
#9
Ashley V Makela, Jeffrey M Gaudet, Paula J Foster
Tumor associated macrophages (TAMs) are associated with tumor growth and metastasis. MRI can detect TAMs labeled with iron oxide (USPIO) or perfluorocarbon (PFC) agents. This study compared these two cell tracking approaches for imaging TAMs in vivo. 4T1 tumors were imaged with MRI at 4 days or 3 weeks post cell implantation after intravenous (i.v.) administration of either USPIO or PFC. Signal loss was detected within tumors at both time points post USPIO. Images acquired at 4 days demonstrated signal loss encompassing the entire tumor and around the periphery at 3 weeks...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28139203/mri-and-fdg-pet-ct-based-assessment-of-axillary-lymph-node-metastasis-in-early-breast-cancer-a-meta-analysis
#10
X Liang, J Yu, B Wen, J Xie, Q Cai, Q Yang
AIM: To evaluate the accuracy of magnetic resonance imaging (MRI) and combined 2-[(18)F]-fluoro-2-deoxy-d-glucose (FDG) positron-emission tomography/computed tomography (PET/CT) for N staging of breast cancer. MATERIALS AND METHODS: A search for relevant diagnostic studies published between January 2008 and October 2015 was conducted in the MEDLINE and EMBASE databases. The quality of the studies was assessed using Quality Assessment of Diagnostic Accuracy Studies (QUADAS) criteria...
April 2017: Clinical Radiology
https://www.readbyqxmd.com/read/27977143/magnetite-nanoparticles-for-stem-cell-labeling-with-high-efficiency-and-long-term-in-vivo-tracking
#11
Noelia Guldris, Bárbara Argibay, Juan Gallo, Ramón Iglesias-Rey, Enrique Carbó-Argibay, Yury V Kolen'ko, Francisco Campos, Tomás Sobrino, Laura M Salonen, Manuel Bañobre-López, José Castillo, José Rivas
Superparamagnetic iron oxide nanoparticles (SPIO-PAA), ultrasmall iron oxide nanoparticles (USPIO-PAA), and glucosamine-modified iron oxide nanoparticles (USPIO-PAA-GlcN) were studied as mesenchymal stem cell (MSCs) labels for cell tracking applications by magnetic resonance imaging (MRI). Pronounced differences were found in the labeling performance of the three samples in terms of cellular dose and labeling efficiency. In combination with polylysine, SPIO-PAA showed nonhomogeneous cell internalization, while for USPIO-PAA no uptake was found...
February 15, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/27976506/uspio-enhanced-lymph-node-mri-using-3d-multi-echo-gre-in-a-rabbit-model
#12
Sung Hun Kim, Soon Nam Oh, Hyun Seok Choi, Hyun Sil Lee, Jaeseop Jun, Yoonho Nam, Sung Hak Lee, Jin-Kwon Lee, Hae Giu Lee
Ultrasmallsuperparamagnetic iron oxide (USPIO) has been suggested to be a negative MR contrast agent to detect metastatic lymph nodes. Previously reported studies have evaluated the diagnostic performance of USPIO-enhanced MR lymph node imaging based on signal intensity. In this study, we investigate the specific performance of three different parametric approaches (normalized signal intensity, R2 * and susceptibility) using 3D multi-echo gradient echo to quantify the USPIO particles in lymph nodes. Nine rabbits with VX2 tumor implants were scanned before and after USPIO injection...
November 2016: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/27916740/development-of-europium-doped-core-shell-silica-cobalt-ferrite-functionalized-nanoparticles-for-magnetic-resonance-imaging
#13
Bhavesh D Kevadiya, Aditya N Bade, Christopher Woldstad, Benson J Edagwa, JoEllyn M McMillan, Balasrinivasa R Sajja, Michael D Boska, Howard E Gendelman
The size, shape and chemical composition of europium (Eu(3+)) cobalt ferrite (CFEu) nanoparticles were optimized for use as a "multimodal imaging nanoprobe" for combined fluorescence and magnetic resonance bioimaging. Doping Eu(3+) ions into a CF structure imparts unique bioimaging and magnetic properties to the nanostructure that can be used for real-time screening of targeted nanoformulations for tissue biodistribution assessment. The CFEu nanoparticles (size ∼7.2nm) were prepared by solvothermal techniques and encapsulated into poloxamer 407-coated mesoporous silica (Si-P407) to form superparamagnetic monodisperse Si-CFEu nanoparticles with a size of ∼140nm...
December 1, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27895477/noninvasive-monitoring-of-early-antiangiogenic-therapy-response-in-human-nasopharyngeal-carcinoma-xenograft-model-using-mri-with-rgd-conjugated-ultrasmall-superparamagnetic-iron-oxide-nanoparticles
#14
Yanfen Cui, Caiyuan Zhang, Ran Luo, Huanhuan Liu, Zhongyang Zhang, Tianyong Xu, Yong Zhang, Dengbin Wang
PURPOSE: Arginine-glycine-aspartic acid (RGD)-based nanoprobes allow specific imaging of integrin αvβ3, a protein overexpressed during angiogenesis. Therefore, this study applied a novel RGD-coupled, polyacrylic acid (PAA)-coated ultrasmall superparamagnetic iron oxide (USPIO) (referred to as RGD-PAA-USPIO) in order to detect tumor angiogenesis and assess the early response to antiangiogenic treatment in human nasopharyngeal carcinoma (NPC) xenograft model by magnetic resonance imaging (MRI)...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27881291/assessment-of-carotid-plaque-inflammation-in-diabetic-and-nondiabetic-patients-an-exploratory-ultrasmall-superparamagnetic-iron-oxide-enhanced-magnetic-resonance-imaging-study
#15
Ammara Usman, Andrew J Patterson, Umar Sadat, Tjun Y Tang, Martin J Graves, Jonathan H Gillard
BACKGROUND: Ultrasmall superparamagnetic iron oxide (USPIO)-enhanced magnetic resonance (MR) imaging enables the identification of inflammation within the atheroma, predominantly by USPIO uptake by macrophages present in atherosclerotic tissue. Diabetic patients, however, may have dysfunctional macrophage activity, which may affect utilization of USPIO in identifying plaque inflammation in this patient cohort. METHODS: Fifteen diabetic and fifteen nondiabetic patients underwent USPIO-enhanced carotid MR imaging using 1...
April 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27868069/early-inflammatory-response-following-traumatic-brain-injury-in-rabbits-using-uspio-and-gd-enhanced-mri
#16
Lin Ouyang, Si Zeng, Gang Zheng, Guang Ming Lu
Purpose. To monitor the inflammatory response (IR) following traumatic brain injury (TBI) before and after the rehabilitation of the blood-brain barrier (BBB) in rabbits using USPIO- and Gd-enhanced MRI. Materials and Methods. Twenty white big-eared rabbits with mild TBI (mTBI) were randomly and equally divided into four groups. Rabbits were sacrificed for the brain specimens immediately after the last MRI-monitoring. Sequences were tse-T1WI, tse-T2WI, Gd-T1WI, and USPIO-T1WI. Dynamical MRI presentations were evaluated and compared with pathological findings for each group...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27864037/early-monitoring-and-quantitative-evaluation-of-macrophage-infiltration-after-experimental-traumatic-brain-injury-a-magnetic-resonance-imaging-and-flow-cytometric-analysis
#17
Sushanta Kumar Mishra, B S Hemanth Kumar, Subash Khushu, Ajay K Singh, Gurudutta Gangenahalli
The inflammatory response following traumatic brain injury (TBI) is regulated by phagocytic cells. These cells comprising resident microglia and infiltrating macrophages play a pivotal role in the interface between early detrimental and delayed beneficial effects of inflammation. The aim of the present study was to monitor the early effect of monocyte/phagocytic accumulation and further to explore its kinetics in TBI mice. Localized macrophage population was monitored using ultrasmall superparamagnetic iron oxide (USPIO) nanoparticle enhanced in vivo serial magnetic resonance imaging (MRI)...
January 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/27781154/intranodal-signal-suppression-in-pelvic-mr-lymphography-of-prostate-cancer-patients-a-quantitative-comparison-of-ferumoxtran-10-and-ferumoxytol
#18
Oscar A Debats, Ansje S Fortuin, Hanneke J M Meijer, Thomas Hambrock, Geert J S Litjens, Jelle O Barentsz, Henkjan J Huisman
OBJECTIVES: The key to MR lymphography is suppression of T2* MR signal in normal lymph nodes, while retaining high signal in metastatic nodes. Our objective is to quantitatively compare the ability of ferumoxtran-10 and ferumoxytol to suppress the MR signal in normal pelvic lymph nodes. METHODS: In 2010, a set of consecutive patients who underwent intravenous MR Lymphography (MRL) were included. Signal suppression in normal lymph nodes in T2*-weighted images due to uptake of USPIO (Ultra-Small Superparamagnetic Particles of Iron Oxide) was quantified...
2016: PeerJ
https://www.readbyqxmd.com/read/27779713/a-novel-blood-pooling-mr-contrast-agent-carboxymethyl-diethylaminoethyl-dextran-magnetite
#19
Akinaga Sonoda, Norihisa Nitta, Keiko Tsuchiya, Ayumi Nitta-Seko, Shinichi Ohta, Hideji Otani, Kiyoshi Murata
Gadofosveset trisodium is available as a prolonged pooling vascular contrast agent for magnetic resonance imaging. As gadolinium (Gd)-based agents may increase the risk for nephrogenic systemic fibrosis in patients with severe renal insufficiency, the present study synthesized carboxymethyl-diethylaminoethyl dextran magnetite (CMEADM) particles as a blood-pooling, non-Gd‑based contrast agent. CMEADM particles carry a negative or positive charge due to the binding of amino and carboxyl groups to the hydroxyl group of dextran...
December 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27775841/evaluation-of-an-fmri-uspio-based-assay-in-healthy-human-volunteers
#20
Richard Baumgartner, William Cho, Alexandre Coimbra, Christopher Chen, Zaiqi Wang, Arie Struyk, Narayanaswamy Venketasubramanian, May Low, Cindy Gargano, Fuqiang Zhao, Donald Williams, Torsten Reese, Stephanie Seah, Dai Feng, Sonya Apreleva, Esben Petersen, Jeffrey L Evelhoch
PURPOSE: To present the testretest and contrast dose effect results of cerebral blood volume (CBV) functional MRI (fMRI) in healthy human volunteers using ferumoxytol (Feraheme), an ultrasmall-superparamagnetic iron oxide (USPIO) nanoparticle. MATERIALS AND METHODS: This was an open-label, two-period, fixed-sequence study in healthy young volunteers. In eight subjects, using a 3 Tesla field strength system, blood oxygen level dependent (BOLD) and CBV fMRI were acquired in response to a visual black-and-white checkboard stimulation paradigm using an escalating ferumoxytol dose design (250, 350, and 510 mg iron)...
October 24, 2016: Journal of Magnetic Resonance Imaging: JMRI
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