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Saednia S, Emami S, Molavipordanjani S, Abedi SM, Amiri FT, Hosseinimehr SJ. Synthesis and Biological Evaluation of 99mTc-Labeled Phenylpiperazine Derivatives as Selective Serotonin-7 Receptor Ligands for Brain Tumor Imaging. Mol Pharm 2021; 18:2360-2374. [PMID: 34027660 DOI: 10.1021/acs.molpharmaceut.1c00172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
With a poor prognosis, glioblastoma multiforme is the most aggressive tumor of the central nervous system in humans. The aim of this study was to develop novel tracers for the tumor targeting and imaging of overexpressed serotonin-7 receptors (5-HT7Rs) in U-87 MG glioma xenografted nude mice. Two phenylpiperazine derivatives named as PHH and MPHH were designed, and the corresponding radiotracers 99mTc-PHH and 99mTc-MPHH were synthesized in high radiochemical purity (>95%). 99mTc-MPHH showed a higher affinity to 5-HT7Rs on U-87 MG cells compared to 99mTc-PHH. In biodistribution studies, the radiocomplexes showed good brain uptake at 15 min combined with good radioactivity retention in the brain for 240 min. Regional rabbit brain studies indicated a higher radioactivity concentration in the hippocampus and diencephalon than in the cerebellum. Compared to 99mTc-MPHH, the 99mTc-PHH exhibited a significantly increased tumor uptake at 15 and 60 min, but the rapid blood clearance of 99mTc-MPHH led to enhanced tumor-to-muscle ratios at 240 min. A significant reduction in tumor uptake 60 min after an injection of pimozide (5-HT7 receptor antagonist) confirms the tumor uptake was receptor-mediated specifically. The tumor-to-contralateral muscle tissue ratio of 99mTc-PHH and 99mTc-MPHH in nude mice with U-87 MG xenograft was measured (5.25 and 4.65) at 60 min as well as (6.25 and 6.76) at 240 min, respectively.
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Affiliation(s)
- Shahnaz Saednia
- Department of Radiopharmacy, Faculty of Pharmacy, Pharmaceutical Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran.,Student Research Committee, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Saeed Emami
- Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Sajjad Molavipordanjani
- Department of Radiology and Nuclear Medicine, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Seyed Mohammad Abedi
- Department of Radiology and Nuclear Medicine, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | | | - Seyed Jalal Hosseinimehr
- Department of Radiopharmacy, Faculty of Pharmacy, Pharmaceutical Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran
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Paparidis G, Akrivou M, Tsachouridou V, Shegani A, Vizirianakis IS, Pirmettis I, Papadopoulos MS, Papagiannopoulou D. Synthesis and evaluation of 99mTc/Re-tricarbonyl complexes of the triphenylphosphonium cation for mitochondrial targeting. Nucl Med Biol 2017; 57:34-41. [PMID: 29227814 DOI: 10.1016/j.nucmedbio.2017.11.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 11/09/2017] [Accepted: 11/12/2017] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Lipophilic delocalized cations accumulate in tumor cell mitochondria due to their higher transmembrane potential. In this work, this strategy was adopted for the development of 99mTc tumor-targeted imaging agents. METHODS Two tridentate ligands containing the triphenylphosphonium cation, L1 (S-cysteinyl) and L2 (N-iminodiacetate) as well as the respective 99mTc/ReL1 and 99mTc/ReL2 tricarbonyl complexes were synthesized. The effect of the ligands and the Re complexes on cell growth in U-87 MG glioblastoma cells was assessed. In vitro stability studies and measurement of logP of the 99mTc tracers was performed. The cellular and mitochondrial uptake of the 99mTc tracers in U-87 MG cells was evaluated. Biodistribution of 99mTcL1 and 99mTcL2 were performed on SCID mice bearing U-87 MG tumors. RESULTS The ligands L1, L2 and the Re1 and ReL2 complexes were characterized spectroscopically. Single products 99mTcL1 and 99mTcL2, >90% stable in rat serum, were obtained. LogP was 0.40±0.14 for 99mTcL1 and -0.02±0.07 for 99mTcL2. L1, ReL1 and ReL2 caused no notable cytotoxicity and L2 was found to infer 40% inhibition of cellular growth at 10-5M as well as 80% cell death in culture at 10-4M. The cell uptake of 99mTcL1 and 99mTcL2 over 4h was 1.26±0.08% and 0.06±0.01% respectively, of which 13.41±3.63% and 18.61±6.19% was distributed in the mitochondria respectively. The initial tumor uptake in mice was found to be >1% ID/g for both 99mTc tracers. CONCLUSIONS In vitro mitochondrial and in vivo tumor targeting was observed, better in 99mTcL1, however these properties should be optimized in future studies. Advances in Knowledge and Implications for Patient Care: Continuous efforts in this direction may lead to a suitable mitochondrial-targeted 99mTc imaging agent for tumor detection.
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Affiliation(s)
- Georgios Paparidis
- Department of Pharmaceutical Chemistry, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Melpomeni Akrivou
- Laboratory of Pharmacology, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Vicky Tsachouridou
- Laboratory of Pharmacology, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Antonio Shegani
- Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, National Centre for Scientific Research "Demokritos", Ag. Paraskevi, 15310 Athens, Greece
| | - Ioannis S Vizirianakis
- Laboratory of Pharmacology, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Ioannis Pirmettis
- Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, National Centre for Scientific Research "Demokritos", Ag. Paraskevi, 15310 Athens, Greece
| | - Minas S Papadopoulos
- Institute of Nuclear and Radiological Sciences and Technology, Energy and Safety, National Centre for Scientific Research "Demokritos", Ag. Paraskevi, 15310 Athens, Greece
| | - Dionysia Papagiannopoulou
- Department of Pharmaceutical Chemistry, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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Gao X, Jin W. The emerging role of tumor-suppressive microRNA-218 in targeting glioblastoma stemness. Cancer Lett 2014; 353:25-31. [PMID: 25042866 DOI: 10.1016/j.canlet.2014.07.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 07/09/2014] [Accepted: 07/09/2014] [Indexed: 01/17/2023]
Abstract
Glioblastoma multiforme (GBM) is by far the most common and most aggressive malignant primary tumor in humans and has poor outcomes despite many advances in treatment using combinations of surgery, radiotherapy and chemotherapy. Recent studies demonstrate that GBM contains a subpopulation of cancer cells with stem cell characteristics, including self-renewal and multipotentiality, and that these cancer stem cells contribute to disease progression. MicroRNAs (miRNAs) are small non-coding regulatory RNA molecules that regulate a variety of cellular processes, including stem cell maintenance. An accumulating body of evidence shows that miR-218 may act as a tumor suppressor by inhibiting glioblastoma invasion, migration, proliferation and stemness through its different targets, indicating the great potential and relevance of miR-218 as a novel class of therapeutic target in glioblastoma.
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Affiliation(s)
- Xingchun Gao
- School of Basic Medical Sciences, Xi'an Medical University, Xi'an 710021, China; Institute of Nano Biomedicine and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Department of Instrument Science and Engineering, School of Electronic Information and Electronic Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Weilin Jin
- School of Basic Medical Sciences, Xi'an Medical University, Xi'an 710021, China; Institute of Nano Biomedicine and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Department of Instrument Science and Engineering, School of Electronic Information and Electronic Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
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Comparison of diffusion tensor, dynamic susceptibility contrast MRI and (99m)Tc-Tetrofosmin brain SPECT for the detection of recurrent high-grade glioma. Magn Reson Imaging 2014; 32:854-9. [PMID: 24848292 DOI: 10.1016/j.mri.2014.04.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 04/05/2014] [Accepted: 04/15/2014] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Treatment induced necrosis is a relatively frequent finding in patients treated for high-grade glioma. Differentiation by imaging modalities between glioma recurrence and treatment induced necrosis is not always straightforward. This is a comparative study of diffusion tensor imaging (DTI), dynamic susceptibility contrast MRI and (99m)Tc-Tetrofosmin brain single-photon emission computed tomography (SPECT) for differentiation of recurrent glioma from treatment induced necrosis. METHODS A prospective study was made of 30 patients treated for high-grade glioma who had suspected recurrent tumor on follow-up MRI. All had been treated by surgical resection of the tumor followed by standard postoperative radiotherapy with chemotherapy. No residual tumor had been found on brain imaging immediately after the initial treatment. All the patients were studied with dynamic susceptibility contrast brain MRI and, within a week, (99m)Tc-Tetrofosmin brain SPECT. RESULTS Both (99m)Tc-Tetrofosmin brain SPECT and dynamic susceptibility contrast MRI could discriminate between tumor recurrence and treatment induced necrosis with 100% sensitivity and 100% specificity. An apparent diffusion coefficient (ADC) ratio cut-off value of 1.27 could differentiate recurrence from treatment induced necrosis with 65% sensitivity and 100% specificity and a fractional anisotropy (FA) ratio cut-off value of 0.47 could differentiate recurrence from treatment induced necrosis with 57% sensitivity and 100% specificity. A significant correlation was demonstrated between (99m)Tc-Tetrofosmin uptake ratio and rCBV (P=0.003). CONCLUSIONS Dynamic susceptibility contrast MRI and brain SPECT with (99m)Tc-Tetrofosmin had the same accuracy and may be used to detect recurrent tumor following treatment for glioma. DTI also showed promise for the detection of recurrent tumor, but was inferior to both dynamic susceptibility contrast MRI and brain SPECT.
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Alexiou GA, Zikou A, Tsiouris S, Goussia A, Kosta P, Papadopoulos A, Voulgaris S, Kyritsis AP, Fotopoulos AD, Argyropoulou MI. Correlation of diffusion tensor, dynamic susceptibility contrast MRI and (99m)Tc-Tetrofosmin brain SPECT with tumour grade and Ki-67 immunohistochemistry in glioma. Clin Neurol Neurosurg 2013; 116:41-5. [PMID: 24309151 DOI: 10.1016/j.clineuro.2013.11.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/03/2013] [Accepted: 11/09/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Assessment of the grade and type of glioma is of paramount importance for prognosis. Tumour proliferative potentials may provide additional information on the behaviour of the tumour, its response to treatment and prognosis. The purpose of this study was to investigate the correlation between diffusion tensor imaging (DTI), dynamic susceptibility contrast (DSC) magnetic resonance imaging (MRI) and (99m)Tc-Tetrofosmin brain single-photon emission computed tomography (SPECT), and the tumour grade and Ki-67 labelling index in newly diagnosed gliomas. METHODS Study was made of patients with suspected glioma on brain MRI between December 2010 and January 2012, by DTI, DSC MRI and (99m)Tc-Tetrofosmin brain SPECT. The proliferative activity of each tumour was measured by deriving the Ki-67 proliferation index from immunohistochemical staining of tumour specimens. RESULTS Glioma was newly diagnosed in 25 patients (17 men, 8 women, aged 19-79 years, median 55 years). The Ki-67 index ranged from 1% to 80% (mean 19.4%). On evaluation of the relationship between the (99m)Tc-Tetrofosmin tumour uptake by gliomas was found to be significantly correlated with cellular proliferation (rho=0.924, p<0.0001). Regarding DTI, significant negative correlation was demonstrated between the apparent diffusion coefficient (ADC) ratio and the Ki-67 index (rho=-0.545, p=0.0087). Significant correlation was also observed between the fractional anisotropy (FA) ratio and the Ki-67 index (rho=0.489, p=0.02). Strong correlation was found between relative cerebral blood volume (rCBV) and Ki-67 index (rho=0.853, p<0.0001), and between the (99m)Tc-Tetrofosmin lesion-to-normal (L/N) uptake ratio and rCBV (rho=0.808, p ≤ 0.0001). Significant negative correlation was demonstrated between the (99m)Tc-Tetrofosmin L/N ratio and ADC ratio (rho=-0.513, p=0.014). These imaging techniques were able to distinguish between low-grade and high-grade gliomas. CONCLUSIONS Findings on DSC MRI and brain SPECT with (99m)Tc-Tetrofosmin metrics were more closely correlated with glioma cellular proliferation.
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Affiliation(s)
- George A Alexiou
- Department of Neurosurgery, University Hospital of Ioannina, Ioannina, Greece.
| | - Anastasia Zikou
- Department of Radiology, University Hospital of Ioannina, Ioannina, Greece
| | - Spyridon Tsiouris
- Department of Nuclear Medicine, University Hospital of Ioannina, Ioannina, Greece
| | - Anna Goussia
- Department of Pathology, University Hospital of Ioannina, Ioannina, Greece
| | - Paraskevi Kosta
- Department of Radiology, University Hospital of Ioannina, Ioannina, Greece
| | | | - Spyridon Voulgaris
- Department of Neurosurgery, University Hospital of Ioannina, Ioannina, Greece
| | | | - Andreas D Fotopoulos
- Department of Nuclear Medicine, University Hospital of Ioannina, Ioannina, Greece
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Diffusion tensor and dynamic susceptibility contrast MRI in glioblastoma. Clin Neurol Neurosurg 2012; 114:607-12. [DOI: 10.1016/j.clineuro.2011.12.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 12/06/2011] [Accepted: 12/13/2011] [Indexed: 11/19/2022]
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Baba K, Ishibashi M, Kaida H, Fujii T, Hiromatsu Y, Kawahara A, Kage M, Hayabuchi N. Relation between (99m)Tc-tetrofosmin thyroid scintigraphy and mitogen-activated protein kinase in papillary thyroid cancer patients. Jpn J Radiol 2011; 29:533-9. [PMID: 21927994 DOI: 10.1007/s11604-011-0592-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Accepted: 03/22/2011] [Indexed: 12/01/2022]
Abstract
PURPOSE The aim of this study was to investigate the relation between (99m)Tc-tetrofosmin uptake and extracellular signal-regulated kinase mitogen-activated protein kinase (ERK MAPK) expression in papillary thyroid cancer patients. MATERIALS AND METHODS Our study population consisted of 14 patients. The histopathological findings for all patients were confirmed by surgery. Patients were administ 740 MBq of (99m)Tc-tetrofosmin. The tumor/background (T/B) ratios in regions of interest (ROIs) were measured at 10 min, 1 h, and 3 h to determine the uptake by papillary cancer. Immunohistopathological staining was performed, and the expression of phospho-ERK MAPK in papillary cancer was investigated. The relation between the expression of phospho-ERK MAPK and the T/B ratio was examined using the Mann-Whitney U-test. RESULTS (99m)Tc-tetrofosmin uptake was positive in all patients. There was a statistically significant relation between the T/B ratio (at 3 h) and the expression of phospho-ERK MAPK but not with the T/B ratio at 10 min or 1 h: T/B ratio at 10 min (P = 0.32), at 1 h (P = 0.62), and at 3 h (P = 0.0072). CONCLUSION Our results suggest that the relation between (99m)Tc-tetrofosmin uptake (3 h T/B ratio) may lead us to assume cell proliferation of papillary cancer.
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Affiliation(s)
- Kenkichi Baba
- Division of Nuclear Medicine, PET Center, Department of Radiology, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan.
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99mTc-Tetrofosmin SPECT for the evaluation of cerebral lesions. Eur J Nucl Med Mol Imaging 2010; 37:2403-4. [DOI: 10.1007/s00259-010-1602-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2010] [Accepted: 08/11/2010] [Indexed: 11/27/2022]
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Alexiou GA, Tsiouris S, Kyritsis AP, Fotakopoulos G, Goussia A, Voulgaris S, Fotopoulos AD. The Value of 99mTc-Tetrofosmin Brain SPECT in Predicting Survival in Patients with Glioblastoma Multiforme. J Nucl Med 2010; 51:1923-6. [DOI: 10.2967/jnumed.110.080929] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Alexiou GA, Tsiouris S, Kyritsis AP, Argyropoulou MI, Voulgaris S, Fotopoulos AD. Assessment of glioma proliferation using imaging modalities. J Clin Neurosci 2010; 17:1233-8. [PMID: 20638283 DOI: 10.1016/j.jocn.2010.03.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Revised: 01/30/2010] [Accepted: 03/07/2010] [Indexed: 11/30/2022]
Abstract
The assessment of glioma proliferation rate is important to predict tumor behavior, response to therapy and prognosis. Various methods, largely involving immunohistological markers in tissue samples, have been proposed to this aim; however, they all require tissue removal through a biopsy or during a surgical procedure. Consequently, non-invasive imaging modalities that could reliably assess the proliferative potential of intracranial space-occupying lesions in vivo would be of obvious significance. In the present study we review the contribution of MRI, positron emission tomography and single-photon emission CT for the assessment of the proliferative potential of gliomas.
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Affiliation(s)
- George A Alexiou
- Department of Neurosurgery, University Hospital of Ioannina, P.O. Box 1186, Ioannina 45110, Greece.
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Alexiou GA, Goussia A, Kyritsis AP, Tsiouris S, Ntoulia A, Malamou-Mitsi V, Voulgaris S, Fotopoulos AD. Influence of Glioma's Multidrug Resistance Phenotype on 99mTc-Tetrofosmin Uptake. Mol Imaging Biol 2010; 13:348-51. [DOI: 10.1007/s11307-010-0369-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Characterization of intracranial space-occupying lesions by 99mTc-Tetrofosmin SPECT. J Neurooncol 2010; 101:83-9. [DOI: 10.1007/s11060-010-0230-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Accepted: 05/11/2010] [Indexed: 11/26/2022]
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Glioma recurrence versus radiation necrosis: accuracy of current imaging modalities. J Neurooncol 2009; 95:1-11. [DOI: 10.1007/s11060-009-9897-1] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2008] [Accepted: 04/06/2009] [Indexed: 01/09/2023]
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Alexiou GA, Voulgaris S, Polyzoidis K, Fotopoulos AD, Tsiouris S, Kyritsis AP. Comment on "Differentiation of tumour recurrence from radiation necrosis in high-grade gliomas using (201)Tl-SPECT". J Clin Neurosci 2009; 16:1112. [PMID: 19477130 DOI: 10.1016/j.jocn.2008.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2008] [Accepted: 11/10/2008] [Indexed: 11/19/2022]
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99mTc-Tetrofosmin SPECT for Glioma Evaluation. Mol Imaging Biol 2009; 11:223. [DOI: 10.1007/s11307-009-0202-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 10/24/2008] [Indexed: 10/21/2022]
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Alexiou GA, Polyzoidis KS, Voulgaris S, Tsiouris S, Fotopoulos AD, Kyritsis AP. Technetium Tc99m tetrofosmin single-photon emission CT for the assessment of glioma proliferation. AJNR Am J Neuroradiol 2008; 29:e96. [PMID: 19008320 DOI: 10.3174/ajnr.a1183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Alexiou GA, Tsiouris S, Kyritsis AP, Polyzoidis KS, Fotopoulos AD. Brain SPECT by 99mTc-Tetrofosmin for the Differentiation of Tumor Recurrence from Radiation Injury. J Nucl Med 2008; 49:1733-4; author reply 1734. [DOI: 10.2967/jnumed.108.054494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Alexiou GA, Tsiouris S, Kyritsis AP, Polyzoidis KS, Fotopoulos AD. 99mTc-Tetrofosmin SPECT for the detection of glioma recurrence. Eur J Nucl Med Mol Imaging 2008; 35:1571-2. [DOI: 10.1007/s00259-008-0824-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2008] [Indexed: 10/22/2022]
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Alexiou GA, Vartholomatos G, Tsiouris S, Papadopoulos A, Kyritsis AP, Polyzoidis KS, Voulgaris S, Fotopoulos AD. Evaluation of meningioma aggressiveness by 99mTc-Tetrofosmin SPECT. Clin Neurol Neurosurg 2008; 110:645-8. [DOI: 10.1016/j.clineuro.2008.03.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2007] [Revised: 03/14/2008] [Accepted: 03/21/2008] [Indexed: 11/16/2022]
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Alexiou GA, Tsiouris S, Polyzoidis KS, Fotopoulos AD, Kyritsis AP. Re: Delayed diagnosis of cerebellar hemangioblastoma after intracerebellar hemorrhage (Lee et al Surg Neurol 2007;67:419-421) Technetium (99m)Tc tetrofosmin brain single-photon emission computed tomography in the evaluation of posterior fossa lesions. SURGICAL NEUROLOGY 2008; 70:108-109. [PMID: 18313731 DOI: 10.1016/j.surneu.2007.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Accepted: 12/19/2007] [Indexed: 05/26/2023]
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Alexiou GA, Tsiouris S, Goussia A, Polyzoidis KS, Fotopoulos AD, Kyritsis AP. 99mTc-Tetrofosmin SPECT for the assessment of meningioma malignancy. J Clin Neurosci 2008; 15:721-2; author reply 722-3. [DOI: 10.1016/j.jocn.2007.08.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2007] [Revised: 07/25/2007] [Accepted: 08/07/2007] [Indexed: 11/26/2022]
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99mTc-Tetrofosmin brain SPECT in the assessment of meningiomas—correlation with histological grade and proliferation index. J Neurooncol 2008; 89:225-30. [DOI: 10.1007/s11060-008-9611-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2007] [Accepted: 04/22/2008] [Indexed: 11/25/2022]
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Alexiou GA, Tsiouris S, Goussia A, Polyzoidis KS, Fotopoulos AD, Kyritsis AP. Non-invasive assessment of meningioma Ki-67 proliferative index by99mTc-Tetrofosmin brain scintigraphy. Neuropathology 2008; 28:106-7. [DOI: 10.1111/j.1440-1789.2007.00848.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Alexiou GA, Tsiouris S, Polyzoidis KS, Kyritsis AP, Fotopoulos AD. 99mTc-Tetrofosmin brain SPECT in prognostic assessment of high-grade gliomas. Radiother Oncol 2008; 86:290. [PMID: 18207267 DOI: 10.1016/j.radonc.2007.12.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2007] [Revised: 12/29/2007] [Accepted: 12/29/2007] [Indexed: 11/30/2022]
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Alexiou GA, Tsiouris S, Kyritsis AP, Polyzoidis KS, Fotopoulos AD. Classic tumour imaging agents for glioma evaluation: 99mTc-tetrofosmin. Eur J Nucl Med Mol Imaging 2007; 34:2143-4. [PMID: 17891392 DOI: 10.1007/s00259-007-0590-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Alexiou GA, Tsiouris S, Kyritsis AP, Polyzoidis KS, Fotopoulos AD. The use of PET scan in glioblastoma multiforme. J Neurooncol 2007; 86:359-60. [PMID: 17634740 DOI: 10.1007/s11060-007-9454-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2007] [Accepted: 06/22/2007] [Indexed: 10/23/2022]
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