Abstract:
BACKGROUND:The radiolabeled amino acid O-(2-(18)F-fluoroethyl)-L-tyrosine (FET) and thymidine analogue 3'-deoxy-3'-(18)F-fluorothymidine (FLT) are widely used for positron emission tomography (PET) brain tumor imaging; however, comparative studies are scarce. The aim of this study therefore was to compare FLT and FET PET for the assessment of anti-VEGF response in glioblastoma xenografts. METHODS:Xenografts with confirmed intracranial glioblastoma were treated with anti-VEGF therapy (B20-4.1) or saline as control. Weekly bioluminescence imaging (BLI), FLT and FET PET/CT were used to follow treatment response. Tracer uptake of FLT and FET was quantified using maximum standardized uptake (SUVmax) values and tumor-to-background ratios (TBRs). Survival, the Ki67 proliferation index and micro-vessel density (MVD) were evaluated. RESULTS:In contrast to FLT TBRs, FET TBRs were significantly lower as early as one week after treatment initiation in the anti-VEGF group as compared to the control group. Following two weeks of treatment, both FLT and FET TBRs were significantly lower in the anti-VEGF group. In contrast, no significant difference between the treatment groups was detected using BLI. Furthermore, we found a significantly lower MVD in the anti-VEGF group as compared to the control group. However, we found no difference in the Ki67 proliferation index or mean survival time. CONCLUSION:FET appears to be a more sensitive tracer than FLT to measure early response to anti-VEGF therapy with PET. Advances in knowledge and implications for patient care FET PET appears to be an early predictor of anti-VEGF efficacy. Confirmation of these results in clinical studies is needed.
journal_name
Nucl Med Bioljournal_title
Nuclear medicine and biologyauthors
Nedergaard MK,Michaelsen SR,Perryman L,Erler J,Poulsen HS,Stockhausen MT,Lassen U,Kjaer Adoi
10.1016/j.nucmedbio.2015.12.002subject
Has Abstractpub_date
2016-03-01 00:00:00pages
198-205issue
3eissn
0969-8051issn
1872-9614pii
S0969-8051(15)00206-1journal_volume
43pub_type
杂志文章abstract::Among the ways to deliver comparatively large amounts of boron to cells in vitro for boron neutron capture studies is the linkage of a boronated macromolecule such as polylysine to an antibody. In order to reduce interference with immunoreactivity, boronated polylysine (BPL) was linked to oligosaccharide moieties on t...
journal_title:Nuclear medicine and biology
pub_type: 杂志文章
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journal_title:Nuclear medicine and biology
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journal_title:Nuclear medicine and biology
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pub_type: 临床试验,杂志文章
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pub_type: 杂志文章
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pub_type: 临床试验,杂志文章
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更新日期:2013-04-01 00:00:00
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pub_type: 杂志文章
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pub_type: 临床试验,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: 临床试验,杂志文章
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journal_title:Nuclear medicine and biology
pub_type: 临床试验,杂志文章
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journal_title:Nuclear medicine and biology
pub_type: 杂志文章,评审
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更新日期:2013-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:1994-05-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.nucmedbio.2013.08.010
更新日期:2014-01-01 00:00:00