Abstract:
INTRODUCTION:Current guidelines for brain PET imaging advice against the injection of diazepam prior to brain FDG-PET examination in order to avoid possible interactions of benzodiazepines with the radiotracer uptake. Nevertheless, many patients undergoing PET studies are likely to be under chronic treatment with benzodiazepines, for example due to the use of different medications such as sleeping pills. Animal studies may provide an extensive and accurate estimation of the effect of benzodiazepines on brain metabolism in a well-defined and controlled framework. AIM:This study aims at evaluating the impact of benzodiazepines on brain FDG uptake after single-dose administration and chronic treatment in rats. METHODS:Twelve Sprague-Dawley healthy rats were randomly divided into two groups, one treated with diazepam and the other used as control group. Both groups underwent PET/CT examinations after single-dose and chronic administration of diazepam (treated) or saline (controls) during twenty-eight days. Different atlas-based quantification methods were used to explore differences on the total uptake and uptake patterns of FDG between both groups. RESULTS:Our analysis revealed a significant reduction of global FDG uptake after acute (-16.2%) and chronic (-23.2%) administration of diazepam. Moreover, a strong trend pointing to differences between acute and chronic administrations (p<0.08) was also observed. Uptake levels returned to normal after interrupting the administration of diazepam. On the other hand, patterns of FDG uptake were not affected by the administration of diazepam. CONCLUSIONS:The administration of diazepam causes a progressive decrease of the FDG global uptake in the rat brain, but it does not change local patterns within the brain. Under these conditions, visual assessment and quantification methods based on regional differences such as asymmetry indexes or SPM statistical analysis would still be valid when administrating this medication.
journal_name
Nucl Med Bioljournal_title
Nuclear medicine and biologyauthors
Silva-Rodríguez J,García-Varela L,López-Arias E,Domínguez-Prado I,Cortés J,Pardo-Montero J,Fernández-Ferreiro A,Ruibal Á,Sobrino T,Aguiar Pdoi
10.1016/j.nucmedbio.2016.09.001subject
Has Abstractpub_date
2016-12-01 00:00:00pages
827-834issue
12eissn
0969-8051issn
1872-9614pii
S0969-8051(16)30111-1journal_volume
43pub_type
杂志文章abstract::In developing radioiodinated agents for pancreatic and brain tumor imaging by single photon emission tomography (SPET), we prepared p-amino-3-[123I]iodo-l-phenylalanine (IAPA), p-[123I]iodo-l-phenylalanine (IPA), L-8-[123I]iodo-1,2,3,4-tetrahydro-7-hydroxyisoquinoline-3-carboxylic acid (ITIC) and L-3-[123I]iodo-alpha-...
journal_title:Nuclear medicine and biology
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journal_title:Nuclear medicine and biology
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journal_title:Nuclear medicine and biology
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journal_title:Nuclear medicine and biology
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journal_title:Nuclear medicine and biology
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journal_title:Nuclear medicine and biology
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abstract:INTRODUCTION:⁶⁸Ga-labeled RGD peptides in combination with PET allow non-invasive determination of α(v)β₃ integrin expression which is highly increased during tumor-induced angiogenesis. The aim of this study was to synthesize and evaluate two RGD peptides containing alternative chelating systems, namely [⁶⁸Ga]NS₃-RGD-...
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更新日期:2013-01-01 00:00:00
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journal_title:Nuclear medicine and biology
pub_type: 杂志文章
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更新日期:2000-01-01 00:00:00
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更新日期:2002-02-01 00:00:00
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journal_title:Nuclear medicine and biology
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更新日期:2009-05-01 00:00:00
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journal_title:Nuclear medicine and biology
pub_type: 杂志文章
doi:
更新日期:2001-05-01 00:00:00
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更新日期:2016-02-01 00:00:00
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journal_title:Nuclear medicine and biology
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更新日期:1999-05-01 00:00:00
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更新日期:2015-04-01 00:00:00
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更新日期:2020-01-01 00:00:00
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更新日期:1994-07-01 00:00:00
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更新日期:1996-07-01 00:00:00
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journal_title:Nuclear medicine and biology
pub_type: 杂志文章
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更新日期:2020-01-01 00:00:00
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journal_title:Nuclear medicine and biology
pub_type: 杂志文章
doi:10.1016/j.nucmedbio.2011.05.008
更新日期:2011-11-01 00:00:00
abstract:BACKGROUND:Cu-diacetyl-bis(N4-methylthiosemicarbazone) [Cu-ATSM], although excellent for oncology applications, may not be suitable for delineating cardiovascular or neurological hypoxia. For this reason, new Cu hypoxia positron emission tomography (PET) imaging agents are being examined to search for a higher selectiv...
journal_title:Nuclear medicine and biology
pub_type: 杂志文章
doi:10.1016/j.nucmedbio.2004.10.004
更新日期:2005-02-01 00:00:00
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journal_title:Nuclear medicine and biology
pub_type: 杂志文章
doi:10.1016/j.nucmedbio.2011.10.005
更新日期:2012-05-01 00:00:00
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journal_title:Nuclear medicine and biology
pub_type: 杂志文章
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更新日期:2004-11-01 00:00:00