Abstract:
OBJECTIVE:Two ligands viz. tert-butyl dithiocarbamate (TBDTC) and methoxyisobutyl dithiocarbamate (MIBDTC), which are analogous to the tert-butyl isonitrile (TBI) and sestamibi (MIBI) ligands, were synthesized and labelled with the [99mTcN] core to evaluate their potential as myocardial agents. As these complexes have low molecular weights, and are neutral and lipophilic in nature, they have a tendency to cross the blood-brain barrier and thus deserve evaluation as potential brain perfusion imaging agents. METHODS:The dithiocarbamate ligands were synthesized from their respective amines, i.e., tert-butylamine and methoxyisobutylamine, by reacting with carbon disulfide in dry ether in the presence of crushed sodium hydroxide. The ligands were characterized by elemental analyses. The 99mTc-nitrido intermediate was prepared from 99mTcO(-)4 using commercially available nitrido kits. The complexation was carried out by mixing the freshly prepared 99mTc-nitrido intermediate and the ligand followed by incubation at room temperature for 10 min. These complexes were characterized by high-performance liquid chromatography (HPLC) using a C-18 reversed phase column with acetonitrile:water as the mobile phase, and by paper electrophoresis. Biodistribution studies were carried out in normal Swiss mice. RESULTS:The ligands were synthesized in near quantitative yields. They were radiolabelled in > 95% yields using the 99mTc-nitrido core, at low ligand concentrations of 0.01 mg . ml(-1) (5.8 x 10(-5) M) for TBDTC and 1 mg . ml(-1) (4.8 x 10(-3) M) for MIBDTC, respectively. Both the complexes were found to be neutral and eluted out as single species in HPLC. Both the complexes showed myocardial as well as brain uptake. The 99mTcN(TBDTC)2 complex showed a better heart/blood and heart/lung ratio when compared to 99mTcN(NOEt)2, an agent in phase III clinical trials proposed for myocardial imaging. This complex also showed brain uptake (3.74%ID/g) at 10 min post-injection (p.i.) with brain/blood ratios better than that of the standard agent 99mTc-D,L-HMPAO at all time points studied. 99mTcN(MIBDTC)2 showed myocardial uptake of 6.41%ID/g at 5 min p.i., which decreased to 1.76%ID/g, 60 min p.i. 99mTcN(MIBDTC)2 also showed good brain uptake (3.21%ID/g at 5 min p.i.) but relatively fast washout (1.33%ID/g at 60 min p.i.) from the target organ. CONCLUSION:Both the complexes under study showed myocardial as well as brain uptake. The results obtained with 99mTcN(TBDTC)2 shows promise towards its development as a potential brain imaging agent.
journal_name
Nucl Med Communjournal_title
Nuclear medicine communicationsauthors
Mathur A,Mallia MB,Subramanian S,Banerjee S,Kothari K,Dhotare B,Sarma HD,Venkatesh Mdoi
10.1097/01.mnm.0000183793.51474.2fkeywords:
subject
Has Abstractpub_date
2005-11-01 00:00:00pages
1013-9issue
11eissn
0143-3636issn
1473-5628pii
00006231-200511000-00012journal_volume
26pub_type
杂志文章abstract:OBJECTIVES:This survey was designed to assess the trends in the frequencies of nuclear medicine procedures in the UK and to determine their contributions to the annual collective effective dose to the UK population. The average activities administered by nuclear medicine departments were compared with guidance on diagn...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/01.mnm.0000184939.28994.f9
更新日期:2005-11-01 00:00:00
abstract::An accurate evaluation of the absorbed dose to the bladder wall from 2-[(18)F]fluoro-2-deoxy-d-glucose (FDG) is clinically important because the bladder is considered as a critical organ in most positron emission tomography (PET) studies that cumulate about 20% of the total activity injection during image procedures. ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-200208000-00008
更新日期:2002-08-01 00:00:00
abstract::The viability of autologous adrenal medullary transplants was evaluated using 125I-meta-iodobenzyl guanidine (MIBG), an adrenal medullary scanning agent. Bilateral cavities in the caudate nuclei were made stereotaxically in Wistar rats. One week later, the left adrenal medulla was resected by microsurgery, followed by...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199409000-00015
更新日期:1994-09-01 00:00:00
abstract:BACKGROUND:Follow-up of 131I whole-body scanning after 131I ablation is associated with potential stunning. Previous studies have suggested that, for scanning, 123I is more sensitive than 131I in identifying thyroid tissue, but its specificity when positive is less certain. AIM:The use of 123I as an imaging agent in p...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/01.mnm.0000194397.20067.b6
更新日期:2006-02-01 00:00:00
abstract:OBJECTIVE:To compare 18-fluorine-labeled 2-deoxy-2-fluoro-D-glucose PET/computed tomography ((18)F-FDG-PET/CT) with contrast enhancement computed tomography (CECT) in the early follow-up of patients who had undergone treatment for primitive retroperitoneal sarcomas (RS). METHODS:This is a retrospective study on 24 pat...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0b013e32835ae545
更新日期:2013-01-01 00:00:00
abstract::In 70 patients with angiographically confirmed coronary heart disease and in 10 controls, a 4 h exercise (E) (injection of 150 MBq 99Tcm-MIBI) rest (R) (800 MBq) protocol was employed. Of these, 10 patients with 21 myocardial defects after E received a third injection 24 h after. SPECT was used to image myocardial dis...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199002000-00002
更新日期:1990-02-01 00:00:00
abstract:INTRODUCTION:Gated myocardial perfusion scintigraphy (g-MPS) provides functional information on the left ventricle (LV) apart from the perfusion status. Computer algorithm-based LV ejection fraction (EF) calculated from resting g-MPS has been found to be reliable in patients with normal perfusion. However, its role in ...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/MNM.0b013e328342b97e
更新日期:2011-06-01 00:00:00
abstract::This paper describes in vitro cytotoxicity experiments with 213Bi- and 225Ac-immunoconjugates on the human epidermoid tumour cell line A431 using a blood group A-reactive murine IgG (2D11) as the specific antibody and MOPC 21 as the control antibody. With both radionuclides, specific cell-killing was achieved. The obs...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199506000-00009
更新日期:1995-06-01 00:00:00
abstract::The method described by Weisner et al. for stabilizing 99Tcm-hexamethylpropylene amine oxime (99Tcm-HMPAO) with cobalt chloride hexahydrate solution is the most promising developed to date. The aim of our work was to study the behaviour of cobalt during the labelling of leukocytes with 99Tcm-HMPAO stabilized in vitro ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199703000-00010
更新日期:1997-03-01 00:00:00
abstract:AIM:It has been reported that dyslipidaemia impairs left ventricular systolic (LVs) and diastolic (LVd) functions, irrespective of atherogenic effects, in the setting of coronary artery disease. The aim of the present study was to evaluate the effects of anti-lipidaemic therapy on LVs and LVd functions by means of mult...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/01.mnm.0000172740.98369.ed
更新日期:2005-09-01 00:00:00
abstract::The role of fluorine-18 fluorodeoxyglucose PET (F-FDG PET) in prognostic evaluation of pre-stem cell transplantation (SCT) and post-SCT is still uncertain. A systematic review and meta-analysis were carried out to detect the prognostic power of F-FDG PET. 'PubMed', EMBASE, and Springer were searched for relevant artic...
journal_title:Nuclear medicine communications
pub_type: 杂志文章,meta分析,评审
doi:10.1097/MNM.0000000000000468
更新日期:2016-04-01 00:00:00
abstract::99mTc-bisphophonates bone scan, planar and single-photon emission computed tomography/computed tomography (SPECT/CT) modalities, is a commonly used technique that provides high sensitivity and specificity for detection of osseous metastases. However, besides bone metastases, SPECT/CT provides an accurate evaluation of...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000001318
更新日期:2021-02-01 00:00:00
abstract:OBJECTIVE:A lack of response to cardiac resynchronization therapy (CRT) has been reported in 20-40% of heart failure patients with left ventricular (LV) dyssynchrony who underwent treatment based on the established guidelines. The study aimed to investigate the relationship between (99m)Tc-tetrofosmin ((99m)Tc-TF) myoc...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/MNM.0000000000000150
更新日期:2014-09-01 00:00:00
abstract::The British Nuclear Medicine Society has developed a process for the service-specific organizational audit of nuclear medicine departments. This process identified the need for a scheme suitable for the audit of the scientific and technical standards of a department providing such a service. This document has evolved ...
journal_title:Nuclear medicine communications
pub_type: 指南,杂志文章,实务指引
doi:10.1097/01.mnm.0000135041.46837.ca
更新日期:2004-08-01 00:00:00
abstract:PURPOSE:Ga-PSMA-11 is a novel PET tracer suggested to be used for imaging of advanced prostate cancer. In this study, we aimed to present a detailed biodistribution of Ga-PSMA-11, including physiological and benign variants of prostate-specific membrane antigen (PSMA) imaging. MATERIALS AND METHODS:We carried out a re...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0000000000000566
更新日期:2016-11-01 00:00:00
abstract::A method for attenuation and scatter correction of brain single photon emission computed tomography (SPECT) is described where computed tomography (CT) images of the brain are used for the calculation of attenuation maps. The method is evaluated for the substance 99mTc hexamethylpropylene amine oxime. A transmission d...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-200304000-00011
更新日期:2003-04-01 00:00:00
abstract:BACKGROUND:Coronary artery disease is a leading cause of morbidity and mortality. Multiple imaging modalities are used to screen for significant coronary artery disease. We report the concordance between coronary computed tomography angiography (CTA) and stress cardiac positron emission tomography (CPET) to detect sign...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0b013e3282f8143b
更新日期:2008-07-01 00:00:00
abstract:PURPOSE:The present study was undertaken to evaluate the ablation rate after administration of 1.1 or 3.7 GBq of iodine- (¹³¹I) to patients with low-risk differentiated thyroid carcinoma (DTC) primarily treated by lobectomy. PATIENTS AND METHODS:Enrolled were 136 consecutive patients affected by histologically proven ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章,随机对照试验
doi:10.1097/MNM.0b013e3283622f3d
更新日期:2013-08-01 00:00:00
abstract::High-quality positron emission tomographic (PET) cameras are expensive and, therefore, not available in many centres. To allow access to clinical 18F-fluorodeoxyglucose (18F-FDG) PET, we began working with an ADAC Vertex camera equipped with a molecular coincidence detection (MCD) module in February 1997. Here we give...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/00006231-199911000-00005
更新日期:1999-11-01 00:00:00
abstract::PET holds potential to provide additional information about tumour metabolic processes, which could aid brain tumour differential diagnosis, grading, molecular subtyping and/or the distinction of therapy effects from disease recurrence. This review discusses PET techniques currently in use for untreated and treated gl...
journal_title:Nuclear medicine communications
pub_type: 杂志文章,评审
doi:10.1097/MNM.0000000000000914
更新日期:2018-12-01 00:00:00
abstract::Captopril renography is used for the non-invasive diagnosis of renovascular hypertension, but suffers from the drawbacks of lower sensitivity and false-positive tests due to a fall in blood pressure. Aspirin renography has been proposed as a useful test for evaluation of unilateral renal artery stenoses of moderate de...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-200004000-00006
更新日期:2000-04-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to investigate the changes in early and late washout rates of 99mTc-methoxyisobutylisonitrile (MIBI) in hypertrophic cardiomyopathy (HCM), and to analyze the relationships between early and late washout rates and the hypertrophic thickness of left ventricular (LV) wall. METHODS:The ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/MNM.0b013e3283009f36
更新日期:2008-08-01 00:00:00
abstract:AIM:The aim of this study was to design a general nuclear medicine method for fast, accurate and direct determination of the clearance of a radioactive indicator provided that all uptake compartments of the radioactive indicator could be included in the field of view of the gamma camera. METHODS:The data material for ...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/00006231-200410000-00006
更新日期:2004-10-01 00:00:00
abstract::In order to perform automatically the thresholding of the amplitude image obtained by phase analysis, a filter based on the probability density of the amplitude is proposed. It generates the image of the significant amplitude by setting to zero the amplitude if its square is lower than 4a0 log(1/alpha)/N where a0 is t...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-198710000-00005
更新日期:1987-10-01 00:00:00
abstract::This work was designed to compare sentinel lymph node (SLN) uptake of 99mTc-labelled human serum albumin colloid (99mTc-HSAC), 99mTc-labelled antimony sulphur colloid (99mTc-SC) and a 99mTc-labelled dextran 70 solution (99mTc-Dx) and their selectivity in the identification of this node in the right rear footpad (RRF) ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-200105000-00006
更新日期:2001-05-01 00:00:00
abstract::Technetium-99m-sestamibi (99mTc-MIBI) imaging is a well-established modality in oncologic investigations. The current study aimed to investigate whether any relationship could be found between 99mTc-MIBI uptake and local perfusion in malignant bone and soft-tissue tumours. It also aimed to compare 99mTc-MIBI images wi...
journal_title:Nuclear medicine communications
pub_type: 临床试验,杂志文章
doi:10.1097/00006231-200106000-00012
更新日期:2001-06-01 00:00:00
abstract::The aim of this prospective study was to assess the efficacy of using whole-kidney, mean parenchymal and pelvic transit times to evaluate renal function following treatment with extracorporeal shock wave lithotripsy (ESWL). Fifteen patients were evaluated 24-48 h before and after ESWL therapy using 99Tcm-DTPA renal sc...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199802000-00010
更新日期:1998-02-01 00:00:00
abstract::System upgrades are a constant feature of many highly technical specialties and are normally assumed to have a negligible effect on patient data. We report on the assessment of an upgrade made to a Norland XR-26 dual-energy X-ray absorptiometry (DXA) system. The upgraded version (2.3) consisted of new hip positioning ...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199604000-00161
更新日期:1996-04-01 00:00:00
abstract::A gamma extremity monitoring system (GEMS) has been used to measure finger doses during radio-nuclide dispensing procedures. GEMS uses a small semi-conductor probe that can be attached to a finger from which a continuous read-out can be obtained that is related to dose rate. The pattern of dose accumulation can be ana...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199902000-00013
更新日期:1999-02-01 00:00:00
abstract::There is a lack of systematic nephrographic studies on epidemic nephritis (EN). We studied 10 patients with EN using [99Tcm]MAG3 gamma camera nephrography and followed up 9 of them 22-68 days later when they had clinically recovered. Variables for renal clearance of [99Tcm]MAG3 and the retention of radioactivity in th...
journal_title:Nuclear medicine communications
pub_type: 杂志文章
doi:10.1097/00006231-199101000-00003
更新日期:1991-01-01 00:00:00