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[18F] FDOPA standardized uptake values of brain tumors are not exclusively dependent on LAT1 expression.


ABSTRACT: [18F]-FDOPA is a labeled amino acid (AA) analog used for positron emission tomography (PET) which is gaining increasing interest in the evaluation of brain tumors (BT). The AA-transporter LAT1 has been shown to be involved in [18F]-FDOPA uptake. The aim of this study was to determine whether the [18F]-FDOPA uptake was correlated with level of LAT1 expression in BT. Twenty-eight BT (including 19 gliomas and 9 metastases) were investigated by [18F]-FDOPA-PET prior to surgery and by anti-LAT1 immunohistochemistry on surgical specimens. The quantitative [18F]-FDOPA measured parameters were SUVmax, SUVmean and SUVpeak. LAT1 expression was quantified using a score (0 to 400). A significant [18F]-FDOPA uptake was associated with a LAT1 score ? 100 (p = 0.02) but there was no linear correlation between intensity of [18F]-FDOPA uptake and score of LAT1 expression whatever the parameters considered. LAT1 expression alone is not sufficient to explain variation of intensity of [18F]-FDOPA uptake in BT.

SUBMITTER: Dadone-Montaudie B 

PROVIDER: S-EPMC5609741 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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[18F] FDOPA standardized uptake values of brain tumors are not exclusively dependent on LAT1 expression.

Dadone-Montaudié Bérengère B   Ambrosetti Damien D   Dufour Maxime M   Darcourt Jacques J   Almairac Fabien F   Coyne John J   Virolle Thierry T   Humbert Olivier O   Burel-Vandenbos Fanny F  

PloS one 20170922 9


[18F]-FDOPA is a labeled amino acid (AA) analog used for positron emission tomography (PET) which is gaining increasing interest in the evaluation of brain tumors (BT). The AA-transporter LAT1 has been shown to be involved in [18F]-FDOPA uptake. The aim of this study was to determine whether the [18F]-FDOPA uptake was correlated with level of LAT1 expression in BT. Twenty-eight BT (including 19 gliomas and 9 metastases) were investigated by [18F]-FDOPA-PET prior to surgery and by anti-LAT1 immun  ...[more]

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