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Journal of Nuclear Medicine

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Meeting ReportNeurosciences Track

Methamphetamine-induced serotonergic neurotoxicity using 4-18F- ADAM in rat brain

Guann-Juh Chen, Hsin-Hsien Yeh, kuo Hsing Ma, Yu-Yeh Kuo and Wen-Sheng Huang
Journal of Nuclear Medicine May 2017, 58 (supplement 1) 660;
Guann-Juh Chen
6Department of Neurosurgery Tri-Service General Hospital Taipei Taiwan
4Department of Neurosurgery Taichung Veterans General Hospital-Chiayi branch Taichung Taiwan
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Hsin-Hsien Yeh
3Brain Research Center National Yang-Ming University Taipei Taiwan
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kuo Hsing Ma
1Department of Anatomy and Biology National Defense Medical Center Taipei Taiwan
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Yu-Yeh Kuo
2Graduate Institute of Medical Sciences National Defense Medical Center Taipei Taiwan
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Wen-Sheng Huang
5Department of Nuclear Medicine Taipei Veterans General Hospital Taipei Taiwan
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Abstract

660

Objectives: Methamphetamine (METH), a psychostimulant, have neurotoxic effects on dopamine and serotonin systems. This experiment investigates METH-induced serotonergic neurotoxicity in rat brain using N, N-dimethyl-2- (2- amino- 4-[18F]-fluorophenylthio) benzylamine, i.e. 4-[18F]-ADAM, to image serotonin transporters (SERT).

Methods: Male adult rats were subcutaneously (s.c.) treated with either 5 mg/kg (n=7) or 10 mg/kg (n=6) METH for 4 separate administrations set at one hour interval. The controls were treated with normal saline (n=5). 4-[18F]-ADAM brain imaging was achieved 30 days after METH treatment using micro-PET (Concorde MicroSystems, Knoxville, TN). The specific uptake ratios (SURs) of 4-[18F]-ADAM were determined by drawing the volumes of interest in various brain regions of the rats with reference to the cerebellum. Tissue immunohistochemistry was carried out 7 days after the scans. Integrated optical density (IOD) ratios of target regions to corpus callosum were also measured.

Results: In the controls, 4-18F-ADAM uptake was measured in the midbrain, thalamus,hypothalamus, caudate putamen, hippocampus and frontal cortex with average SURs of 4.16, 3.63, 4.06, 3.76, 2.83 and 2.52, respectively at 30-60 min post-injection. The SURs of 4-[18F]-ADAM significantly reduced in all brain regions by 30 days after the METH- treatment; the effect is more prominent in the group treated with 10 mg/kg Meth (57% ~ 42% decreased compared to the controls; p< 0.05, each). Significant decrease of the tyrosine hydroxylase immunostaining and IOD ratios in caudate putamen, nucleus accubems, Substantia nigra pars compacta and Substantia nigra pars reticulata were also noted in the METH treated rats (50%,50%,41% and 21%; decreased compared to the controls; p< 0.01, each. ).

Conclusion: METH treatment may cause a dose-dependent loss of central SERT that can be evaluated by using 4-[18F]-ADAM micro-PET images. Research Support: Grants MOST 103-2314-B-075 -088 -MY3-3, NSC-99 and 100-2623-7016-001.

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Journal of Nuclear Medicine
Vol. 58, Issue supplement 1
May 1, 2017
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Methamphetamine-induced serotonergic neurotoxicity using 4-18F- ADAM in rat brain
Guann-Juh Chen, Hsin-Hsien Yeh, kuo Hsing Ma, Yu-Yeh Kuo, Wen-Sheng Huang
Journal of Nuclear Medicine May 2017, 58 (supplement 1) 660;

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Methamphetamine-induced serotonergic neurotoxicity using 4-18F- ADAM in rat brain
Guann-Juh Chen, Hsin-Hsien Yeh, kuo Hsing Ma, Yu-Yeh Kuo, Wen-Sheng Huang
Journal of Nuclear Medicine May 2017, 58 (supplement 1) 660;
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