Abstract:
PURPOSE:In Alzheimer's disease (AD), increased metabolism of monoamines by monoamine oxidase type B (MAO-B) leads to the production of toxic reactive oxygen species (ROS), which are thought to contribute to disease pathogenesis. Inhibition of the MAO-B enzyme may restore brain levels of monoaminergic neurotransmitters, reduce the formation of toxic ROS and reduce neuroinflammation (reactive astrocytosis), potentially leading to neuroprotection. Sembragiline (also referred as RO4602522, RG1577 and EVT 302 in previous communications) is a potent, selective and reversible inhibitor of MAO-B developed as a potential treatment for AD. METHODS:This study assessed the relationship between plasma concentration of sembragiline and brain MAO-B inhibition in patients with AD and in healthy elderly control (EC) subjects. Positron emission tomography (PET) scans using [11C]-L-deprenyl-D2 radiotracer were performed in ten patients with AD and six EC subjects, who received sembragiline each day for 6-15 days. RESULTS:At steady state, the relationship between sembragiline plasma concentration and MAO-B inhibition resulted in an Emax of ∼80-90 % across brain regions of interest and in an EC50 of 1-2 ng/mL. Data in patients with AD and EC subjects showed that near-maximal inhibition of brain MAO-B was achieved with 1 mg sembragiline daily, regardless of the population, whereas lower doses resulted in lower and variable brain MAO-B inhibition. CONCLUSIONS:This PET study confirmed that daily treatment of at least 1 mg sembragiline resulted in near-maximal inhibition of brain MAO-B enzyme in patients with AD.
journal_name
Eur J Nucl Med Mol Imagingauthors
Sturm S,Forsberg A,Nave S,Stenkrona P,Seneca N,Varrone A,Comley RA,Fazio P,Jamois C,Nakao R,Ejduk Z,Al-Tawil N,Akenine U,Halldin C,Andreasen N,Ricci Bdoi
10.1007/s00259-016-3510-6subject
Has Abstractpub_date
2017-03-01 00:00:00pages
382-391issue
3eissn
1619-7070issn
1619-7089pii
10.1007/s00259-016-3510-6journal_volume
44pub_type
杂志文章,多中心研究abstract:PURPOSE:Depression is a common symptom in patients suffering from Parkinson's disease (PD) and markedly reduces their quality of life. As post-mortem studies have shown, its presence may reflect extensive cell loss in the midbrain and brainstem with imbalances in monoaminergic neurotransmitters. However, in vivo eviden...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-008-0979-7
更新日期:2009-03-01 00:00:00
abstract:PURPOSE:Tau accumulation is a core pathologic change in various neurodegenerative diseases including Alzheimer's disease and frontotemporal lobar degeneration-tau. Recently, tau positron emission tomography tracers such as [18F] AV-1451 and [18F] THK5351 have been developed to detect tau deposition in vivo. In the pres...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-017-3876-0
更新日期:2018-03-01 00:00:00
abstract:PURPOSE:The future significance of peptide radiopharmaceuticals in diagnostic imaging with PET will be dependent on methodological aspects, as well as other requirements such as availability of the radionuclide and cost-effectiveness of its production. The aim of this study was to evaluate whether recent improvements i...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-004-1582-1
更新日期:2004-12-01 00:00:00
abstract:PURPOSE:The objective of this study was to determine the incremental staging information provided by positron emission tomography/computed tomography (PET/CT) and its impact on management plans in patients with untreated stage III-IV head and neck squamous cell carcinoma (HNSCC). METHODS:We prospectively studied, betw...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-015-3071-0
更新日期:2015-08-01 00:00:00
abstract:PURPOSE:To explore the potential complementary value of PET/CT and dynamic contrast-enhanced MRI in predicting pathological response to neoadjuvant chemotherapy (NAC) of breast cancer and the dependency on breast cancer subtype. METHODS:We performed (18)F-FDG PET/CT and MRI examinations before and during NAC. The imag...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-014-2770-2
更新日期:2014-08-01 00:00:00
abstract:PURPOSE:[(18)F]Fluoro-3'-deoxy-3'-L-fluorothymidine ([(18)F]FLT) is a tissue proliferation marker which has been widely validated as a tumour-specific imaging tracer for PET. [(18)F]FLT uptake in breast cancer is generally quantified at the region level or through first-order statistical descriptors (mean or maximum va...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-014-2757-z
更新日期:2014-09-01 00:00:00
abstract:PURPOSE:Low sensitivity can become a major problem when very small pinholes are used in SPECT imaging. Although a larger pinhole aperture will improve the sensitivity, this will be at the cost of the spatial resolution. With a view to improving the resolution-sensitivity trade-off, this paper explores an iterative reco...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-006-0225-0
更新日期:2007-02-01 00:00:00
abstract:PURPOSE:The purpose of this study was to evaluate and compare, by means of dynamic PET, the pharmacokinetics of 68Ga-DOTATOC, a tracer which reflects the expression of somatostatin receptors (SSTRs), and of [18F]FDG, a marker of tumour viability, in patients with metastatic neuroendocrine tumours (NETs) in whom 90Y-DOT...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-006-0110-x
更新日期:2006-10-01 00:00:00
abstract:PURPOSE:Reduced presynaptic dopaminergic activity plays an important role in the development of levodopa-induced dyskinesia (LID) in Parkinson's disease (PD). In this study, we investigated whether dopaminergic function in the nigrostriatal system is associated with the timing of LID onset. METHODS:From among 412 drug...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-017-3844-8
更新日期:2018-03-01 00:00:00
abstract:PURPOSE:In Churg-Strauss syndrome (CSS) it is important to detect cardiac involvement, which predicts poor prognosis. This study evaluated whether (123)I-metaiodobenzylguanidine (MIBG) scintigraphy could detect cardiac damage and predict cardiac events in CSS. METHODS:(123)I-MIBG scintigraphy was performed in 28 patie...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-010-1617-8
更新日期:2011-02-01 00:00:00
abstract:PURPOSE:Using 123I for diagnostic purposes avoids the risk of stunning for subsequent radioiodine treatment and affords an excellent image quality. In this study we assessed the role of 123I in comparison with 131I post-treatment imaging in patients with thyroid cancer. METHODS:We compared a total of 292 123I scans wi...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-006-0341-x
更新日期:2007-07-01 00:00:00
abstract:PURPOSE:Pretargeted radioimmunotherapy (PRIT) with bispecific antibodies (bsMAb) and a radiolabeled peptide reduces the radiation dose to normal tissues. Here we report the accuracy of an (111)In-labeled pretherapy test dose for personalized dosing of (177)Lu-labeled IMP288 following pretargeting with the anti-CEA × an...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 临床试验,杂志文章
doi:10.1007/s00259-014-2742-6
更新日期:2014-08-01 00:00:00
abstract:OBJECTIVE:Quantitative PET/MR imaging is challenged by the accuracy of synthetic CT (sCT) generation from MR images. Deep learning-based algorithms have recently gained momentum for a number of medical image analysis applications. In this work, a novel sCT generation algorithm based on deep learning adversarial semanti...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-019-04380-x
更新日期:2019-12-01 00:00:00
abstract:PURPOSE:Modulation of the immune system by the CNS may involve serotonergic regulation via the brain serotonin transporters (SERT). This regulation may be disturbed in patients with CNS disorders including multiple sclerosis (MS). Central serotonergic mechanisms have not been investigated in MS by in vivo imaging. The ...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-013-2636-z
更新日期:2014-05-01 00:00:00
abstract:PURPOSE:The objective of this article is to present a new method for the diagnosis of insulinoma with the use of [Lys(40)(Ahx-HYNIC-(99m)Tc/EDDA)NH2]-exendin-4. METHODS:Studies were performed in 11 patients with negative results of all available non-isotopic diagnostic methods (8 with symptoms of insulinoma, 2 with ma...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-012-2299-1
更新日期:2013-04-01 00:00:00
abstract::As measurement of glomerular filtration rate (GFR) is now generally the responsibility of departments of nuclear medicine, it is important for nuclear medicine physicians and scientists to understand the pharmacokinetics of the indicators and radiotracers that are used, generally known as filtration markers. The singl...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,评审
doi:10.1007/s00259-003-1341-8
更新日期:2004-01-01 00:00:00
abstract:PURPOSE:We developed and tested a single acquisition rest (99m)Tc-sestamibi/stress (201)Tl dual isotope protocol (SDI) with the intention of improving the clinical workflow and patient comfort of myocardial perfusion single photon emission computed tomography (SPECT). METHODS:The technical feasibility of SDI was evalu...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 临床试验,杂志文章
doi:10.1007/s00259-013-2551-3
更新日期:2014-03-01 00:00:00
abstract::This paper updates the information on the prevalence of the disorders induced by iodine deficiency (IDD) in Europe. Thirty-two European countries were still affected by mild to severe iodine deficiency in the late 1990s. The most severely affected countries were in Eastern Europe, including Central Asia, but Western E...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,评审
doi:10.1007/s00259-002-0812-7
更新日期:2002-08-01 00:00:00
abstract:PURPOSE:The objective of this study was to evaluate whether 68Ga-PSMA PET/CT whole-body tumor burden (PSMAwbtb) is associated with clinical parameters and laboratory parameters in prostate cancer patients. METHODS:We retrospectively evaluated prostate cancer patients submitted to PSMA PET/CT for primary staging purpos...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-020-04981-x
更新日期:2021-02-01 00:00:00
abstract:PURPOSE:We report the biodistribution and radiation dosimetry of an integrin αvβ3 specific PET tracer (18)F-AlF-NOTA-E[PEG4-c(RGDfk)]2) (denoted as (18)F-Alfatide II). We also assessed the value of (18)F-Alfatide II in patients with brain metastases. METHODS:A series of torso (from the skull to the thigh) static image...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-015-3118-2
更新日期:2015-12-01 00:00:00
abstract:PURPOSE:(18)F-8-cyclopentyl-3-(3-fluoropropyl)-1-propylxanthine ((18)F-CPFPX) is a potent radioligand to study human cerebral A(1) adenosine receptors and their neuromodulatory and neuroprotective functions with positron emission tomography (PET). The purpose of this study was to determine the biodistribution and the r...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-008-0753-x
更新日期:2008-08-01 00:00:00
abstract:PURPOSE:The molecular features isocitrate dehydrogenase (IDH) mutation and 1p/19q co-deletion have gained major importance for both glioma typing and prognosis and have, therefore, been integrated in the World Health Organization (WHO) classification in 2016. The aim of this study was to characterize static and dynamic...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-017-3846-6
更新日期:2018-03-01 00:00:00
abstract:PURPOSE:PSMA ligand imaging with hybrid PET/MRI scanners could be an integral part of the clinical routine in the future. However, the first study about this novel method revealed a severe photopenic artifact ("halo artifact") around the urinary bladder causing significantly reduced tumor visibility. The aim of this ev...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-017-3718-0
更新日期:2017-09-01 00:00:00
abstract:PURPOSE:It is a matter of controversy whether prophylactic lymph node dissection improves prognosis and survival in papillary thyroid carcinoma (PTC) patients without suspicion of lymph node metastases either clinically or on ultrasonography. It is possible that in such patients the use of lymphatic mapping and sentine...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-006-0316-y
更新日期:2007-06-01 00:00:00
abstract::Radionuclide imaging of cardiac function represents a number of well-validated techniques for accurate determination of right (RV) and left ventricular (LV) ejection fraction (EF) and LV volumes. These first European guidelines give recommendations for how and when to use first-pass and equilibrium radionuclide ventri...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,实务指引
doi:10.1007/s00259-007-0694-9
更新日期:2008-04-01 00:00:00
abstract:PURPOSE/BACKGROUND:[18F]fluoroethylcholine (18FECH) has been shown to be a valuable PET-tracer in recurrent prostate cancer (PCa), but still has limited accuracy. RM2 is a gastrin-releasing peptide receptor (GRPr) antagonist that binds to GRPr on PCa cells. Recent studies suggest that GRPr imaging with PET/CT is a prom...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-017-3702-8
更新日期:2017-08-01 00:00:00
abstract:PURPOSE:The aim of this study was to evaluate the applicability of [(99m)Tc]Demotensin 5 and 6 [Formula: see text] in the targeted diagnostic imaging of neurotensin subtype 1 receptor (NTS1-R)-expressing tumours. METHODS:Labelling of Demotensin 5 and 6 with (99m)Tc was conducted by brief incubation with (99m)TcO(4) (-...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-007-0489-z
更新日期:2007-11-01 00:00:00
abstract:PURPOSE:Vascular stiffness may potentially be used as a screening tool to identify asymptomatic patients with diabetes with abnormal myocardial perfusion. The purpose of this study was therefore to determine the association between vascular stiffness, measured in term of pulse wave velocity (PWV) and augmentation index...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 临床试验,杂志文章
doi:10.1007/s00259-011-1894-x
更新日期:2011-11-01 00:00:00
abstract:PURPOSE:To assess the relationship between serum thyroglobulin (Tg) levels, Tg doubling time (Tg-DT) and the diagnostic performance of (18)F-FDG PET/CT in detecting recurrences of (131)I-negative differentiated thyroid carcinoma (DTC). METHODS:Included in the present study were 102 patients with DTC. All patients were...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-013-2370-6
更新日期:2013-06-01 00:00:00
abstract:PURPOSE:We investigated the relationship between three-dimensional volumetric data of the metabolically active tumour volume assessed using [(11)C]-methionine positron emission tomography (MET-PET) and the area of gadolinium-diethylenetriaminepentaacetic acid (Gd-DTPA) enhancement assessed using magnetic resonance imag...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-009-1219-5
更新日期:2010-01-01 00:00:00