Influx rate of 18 F-fluoroaminosuberic acid reflects cystine/glutamate antiporter expression in tumour xenografts.
Autor: | Pitman KE; Department of Physics, University of Oslo, P.O. Box 1048 Blindern, 0316, Oslo, Norway.; Department of Medical Physics, Oslo University Hospital, Oslo, Norway., Alluri SR; Department of Chemistry, University of Oslo, P.O. Box 1048 Blindern, 0316, Oslo, Norway., Kristian A; Department of Tumour Biology, Oslo University Hospital, Oslo, Norway., Aarnes EK; Department of Radiation Biology, Oslo University Hospital, Oslo, Norway., Lyng H; Department of Radiation Biology, Oslo University Hospital, Oslo, Norway., Riss PJ; Department of Chemistry, University of Oslo, P.O. Box 1048 Blindern, 0316, Oslo, Norway., Malinen E; Department of Physics, University of Oslo, P.O. Box 1048 Blindern, 0316, Oslo, Norway. eirik.malinen@fys.uio.no.; Department of Medical Physics, Oslo University Hospital, Oslo, Norway. eirik.malinen@fys.uio.no. |
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Jazyk: | angličtina |
Zdroj: | European journal of nuclear medicine and molecular imaging [Eur J Nucl Med Mol Imaging] 2019 Sep; Vol. 46 (10), pp. 2190-2198. Date of Electronic Publication: 2019 Jul 01. |
DOI: | 10.1007/s00259-019-04375-8 |
Abstrakt: | Purpose: 18 F-fluoroaminosuberic acid ( 18 F-FASu) is a recently developed amino acid tracer for positron emission tomography (PET) of oxidative stress that may offer improved tumour assessment over the conventional tracer 18 F-fluorodeoxyglucose ( 18 F-FDG). Our aim was to evaluate and relate dynamic 18 F-FASu and 18 F-FDG uptake with pharmacokinetic modelling to transporter protein expression levels in a panel of diverse tumour xenograft lines. Methods: Four different tumour xenograft lines were implanted in female athymic nude mice: MAS98.12 and HBCx3 (breast), TPMX (osteosarcoma) and A549 (lung). Dynamic PET over 60 min was performed on a small animal unit. The time-activity curves (TACs) for 18 F-FASu and 18 F-FDG in individual tumours were used to extract early (SUV Results: 18 F-FASu showed higher SUV Conclusion: The influx rate of 18 F-FASu reflects xCT activity in tumour xenografts. Dynamic PET with pharmacokinetic modelling is needed to fully appraise 18 F-FASu distribution routes. |
Databáze: | MEDLINE |
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