Title: A PET brain reporter gene system based on type 2 cannabinoid receptors
Authors: Vandeputte, Caroline
Evens, Nele
Toelen, Jaan
Deroose, Christophe
Bosier, Barbara
Ibrahimi, Abdelilah
Van der Perren, Anke
Gijsbers, Rik
Janssen, Peter
Lambert, Didier
Verbruggen, Alfons
Debyser, Zeger
Bormans, Guy
Baekelandt, Veerle
Van Laere, Koen # ×
Issue Date: Jun-2011
Publisher: Society of Nuclear Medicine
Series Title: Journal of Nuclear Medicine vol:52 issue:7 pages:1102-1109
Abstract: PET of gene expression in the brain may greatly facilitate neuroscience research and potential clinical implementation of gene or cell therapy of central nervous system diseases. To date, no adequate PET reporter system is available for the central nervous system because available tracers either do not cross the intact blood-brain barrier or have high background signals. Here we report the first, to our knowledge, PET reporter system for imaging gene expression in the intact brain. METHODS: We selected the human type 2 cannabinoid receptor (hCB(2)) as a reporter because of its low basal expression in the brain. An inactive mutant (D80N) was chosen so as not to interfere with signal transduction. As a reporter probe we used the (11)C-labeled CB(2) ligand, (11)C-GW405833, which readily crosses the blood-brain barrier. Dual-modality imaging lentiviral and adeno-associated viral vectors encoding both hCB(2)(D80N) and firefly luciferase or enhanced green fluorescent protein were engineered and validated in cell culture. Next, hCB(2)(D80N) was locoregionally overexpressed in rat striatum by stereotactic injection of lentiviral and adeno-associated viral vectors. RESULTS: Kinetic PET revealed specific and reversible CB(2) binding of (11)C-GW405833 in the transduced rat striatum. hCB(2) and firefly luciferase expression was followed until 9 mo and showed similar kinetics. Both hCB(2) expression and enhanced green fluorescent protein expression were confirmed by immunohistochemistry. CONCLUSION: Dual-modality imaging viral vectors encoding hCB(2)(D80N) were engineered, and the reporter system was validated in different animal species. The results support the potential future clinical use of CB(2) as a PET reporter in the intact brain.
ISSN: 0161-5505
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Virology and Gene Therapy
Nuclear Medicine & Molecular Imaging
Section Child - Miscellaneous (-)
Research Group for Neurobiology and Gene Therapy
Research Group Neurophysiology
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
Vandeputte(2011).pdf Published 549KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science