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Chiu CH, Ma KH, Huang EYK, Chang HW, Weng SJ, Yu TH, Farn SS, Kuo YY, Huang WS, Cheng CY, Tao PL, Yeh SHH. Dextromethorphan moderates reward deficiency associated with central serotonin transporter availability in 3,4-methylenedioxy-methamphetamine-treated animals. J Chin Med Assoc 2024; 87:538-549. [PMID: 38587377 DOI: 10.1097/jcma.0000000000001087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/09/2024] Open
Abstract
BACKGROUND The neurotoxicity of 3,4-methylenedioxy-methamphetamine (MDMA) to the serotonergic system is well-documented. Dextromethorphan (DM), an antitussive drug, decreased morphine- or methamphetamine (MA)-induced reward in rats and may prevent MDMA-induced serotonergic deficiency in primates, as indicated by increased serotonin transporter (SERT) availability. We aimed to investigate the effects of DM on reward, behavioral sensitization, and neurotoxicity associated with loss of SERT induced by chronic MDMA administration in rats. METHODS Conditioned place preference (CPP) and locomotor activity tests were used to evaluate drug-induced reward and behavioral sensitization; 4-[ 18 F]-ADAM/animal-PET and immunohistochemistry were used to explore the effects of DM on MDMA-induced loss of SERT. RESULTS MDMA significantly reduced SERT binding in the rat brain; however, co-administration of DM significantly restored SERT, enhancing the recovery rate at day 14 by an average of ~23% compared to the MDMA group. In confirmation of the PET findings, immunochemistry revealed MDMA reduced SERT immunoactivity in all brain regions, whereas DM markedly increased the serotonergic fiber density after MDMA induction. CONCLUSION Behavioral tests and in vivo longitudinal PET imaging demonstrated the CPP indexes and locomotor activities of the reward system correlate negatively with PET 4-[ 18 F]ADAM SERT activity in the reward system. Our findings suggest MDMA induces functional abnormalities in a network of brain regions important to decision-making processes and the motivation circuit. DM may exert neuroprotective effects to reverse MDMA-induced neurotoxicity.
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Affiliation(s)
- Chuang-Hsin Chiu
- Department of Nuclear Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Kuo-Hsing Ma
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan, ROC
| | | | - Hsien-Wen Chang
- School of Pharmacy, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Shao-Ju Weng
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Tsung-Hsun Yu
- Brain Research Center, School of Medicine, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Shiou-Shiow Farn
- Isotope Application Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC
| | - Yu-Yeh Kuo
- Department of Nursing, Hsin-Sheng College of Medical Care and Management, Taoyuan, Taiwan, ROC
| | - Wen-Sheng Huang
- Department of Nuclear Medicine, Cheng-Hsin General Hospital, Taipei, Taiwan, ROC
| | - Cheng-Yi Cheng
- Department of Nuclear Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Pao-Luh Tao
- Center for Neuropsychiatric Research, National Health Research Institutes, Miaoli, Taiwan, ROC
| | - Skye Hsin-Hsien Yeh
- Brain Research Center, School of Medicine, National Defense Medical Center, Taipei, Taiwan, ROC
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Tsai CJ, Chiu CH, Kuo YY, Huang WS, Yu TH, Flores LG, Yeh SHH, Ma KH. 3,4-Methylenedioxymethamphetamine (MDMA) Model: In Vivo 4-[18F]-ADAM PET Imaging. Int J Mol Sci 2022; 23:ijms23137035. [PMID: 35806049 PMCID: PMC9266335 DOI: 10.3390/ijms23137035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 06/20/2022] [Accepted: 06/22/2022] [Indexed: 11/25/2022] Open
Abstract
Numerous studies have confirmed that 3,4-Methylenedioxymethamphetamine (MDMA) produces long-lasting changes to the density of the serotonin reuptake transporter (SERT). Amitriptyline (AMI) has been shown to exert neuroprotective properties in neuropathologic injury. Here, we used a SERT-specific radionuclide, 4-[18F]-ADAM, to assess the longitudinal alterations in SERT binding and evaluate the synergistic neuroprotective effect of AMI in a rat MDMA model. In response to MDMA treatment regimens, SERT binding was significantly reduced in rat brains. Region-specific recovery rate (normalized to baseline) in the MDMA group at day 14 was 71.29% ± 3.21%, and progressively increased to 90.90% ± 7.63% at day 35. AMI dramatically increased SERT binding in all brain regions, enhancing average ~18% recovery rate at day 14 when compared with the MDMA group. The immunochemical staining revealed that AMI markedly increased the serotonergic fiber density in the cingulate and thalamus after MDMA-induction, and confirmed the PET findings. Using in vivo longitudinal PET imaging, we demonstrated that SERT recovery was positively correlated with the duration of MDMA abstinence, implying that lower SERT densities in MDMA-induced rats reflected neurotoxic effects and were (varied) region-specific and reversible. AMI globally accelerated the recovery rate of SERT binding and increased SERT fiber density with possible neuroprotective effects.
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Affiliation(s)
- Chi-Jung Tsai
- Department of Nuclear Medicine, Taipei Medical University Hospital, Taipei 110, Taiwan; (C.-J.T.); (W.-S.H.)
| | - Chuang-Hsin Chiu
- Department of Nuclear Medicine, Tri-Service General Hospital, Taipei 114, Taiwan;
| | - Yu-Yeh Kuo
- Department of Nursing, Hsin-Sheng College of Medical Care and Management, Taoyuan 325, Taiwan;
| | - Wen-Sheng Huang
- Department of Nuclear Medicine, Taipei Medical University Hospital, Taipei 110, Taiwan; (C.-J.T.); (W.-S.H.)
- Department of Nuclear Medicine, Cheng-Hsin General Hospital, Taipei 112, Taiwan
| | - Tsung-Hsun Yu
- Brain Research Center, National Yang Ming Chaio Tung University, Taipei 112, Taiwan; (T.-H.Y.); (S.H.-H.Y.)
| | | | - Skye Hsin-Hsien Yeh
- Brain Research Center, National Yang Ming Chaio Tung University, Taipei 112, Taiwan; (T.-H.Y.); (S.H.-H.Y.)
- School of Medicine, National Defense Medical Center, Taipei 110, Taiwan
| | - Kuo-Hsing Ma
- Department of Biology and Anatomy, National Defense Medi Center, Taipei 110, Taiwan
- Correspondence: ; Tel.: +886-2-8792-3100 (ext. 18728 or 18081)
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Yeh SHH, Kuo YY, Huang WS, Chiu CH, Yu TH, II LGF, Tsai CJ, Cheng CY, Ma KH. Preliminary Results on the Long-Term Effects of Dextromethorphan on MDMA-Mediated Serotonergic Deficiency and Volumetric Changes in Primates Based on 4-[18F]-ADAM PET/MRI. Front Neurosci 2022; 16:837194. [PMID: 35692422 PMCID: PMC9175743 DOI: 10.3389/fnins.2022.837194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 04/26/2022] [Indexed: 11/13/2022] Open
Abstract
Alterations to the serotonergic system due to 3,4-methylenedioxymethamphetamine (MDMA) (ecstasy) consumption have been extensively documented. However, knowledge of the reversibility of these neurotoxic effects based on in vivo evaluations of serotonin transport (SERT) availability remains limited. This study aimed to evaluate the long-term neurotoxicity of MDMA after 66 months abstinence and explored whether Dextromethorphan, a non-competitive N-methyl-D-aspartate (NMDA) receptor, could attenuate MDMA-induced neurotoxicity using 4-[18F]-ADAM, an imaging ligand that selectively targets SERT, with positron emission tomography technology (PET). Nine monkeys (Macaca cyclopis) were used in this study: control, MDMA, and DM + MDMA. Static 4-[18F]-ADAM PET was performed at 60 and 66 months after drug treatment. Serotonin transport (SERT) availability was presented as the specific uptake ratios (SURs) of 4-[18F]-ADAM in brain regions. Voxel-based region-specific SERT availability was calculated to generate 3D PET/MR images. Structural Magnetic Resonance Imaging (MRI) volumetric analysis was also conducted at 60 months. Significantly decreased 4-[18F]-ADAM SURs were observed in the striatum and thalamus of the MDMA group at 60 and 66 months compared to controls; the midbrain and frontal cortex SURs were similar at 60 and 66 months in the MDMA and control groups. All eleven brain regions showed significantly lower (∼13%) self-recovery rates over time; the occipital cortex and cingulate recovered to baseline by 66 months. DM attenuated MDMA-induced SERT deficiency on average, by ∼8 and ∼1% at 60 and 66 months, respectively; whereas significant differences were observed between the thalamus and amygdala of the MDMA and DM + MDMA groups at 66 months. Compared to controls, the MDMA group exhibited significantly increased (∼6.6%) gray matter volumes in the frontal cortex, occipital cortex, caudate nucleus, hippocampus, midbrain, and amygdala. Moreover, the gray matter volumes of the occipital cortex, hippocampus and amygdala correlated negatively with the 4-[18F]-ADAM SURs of the same regions. DM (n = 2) did not appear to affect MDMA-induced volumetric changes. The 4-[18F]-ADAM SURs, lower self-recovery rate and increased volumetric values indicate the occipital cortex, hippocampus and amygdala still exhibit MDMA-induced neurotoxicity after 66 months’ abstinence. Moreover, DM may prevent MDMA-induced serotonergic deficiency, as indicated by increased 4-[18F]-ADAM SURs and SERT availability, but not volumetric changes.
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Affiliation(s)
- Skye Hsin-Hsien Yeh
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
- School of Medicine, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Yeh Kuo
- Department of Nursing, Hsin-Sheng College of Medical Care and Management, Taoyuan, Taiwan
| | - Wen-Sheng Huang
- Department of Nuclear Medicine, Cheng-Hsin General Hospital, Taipei, Taiwan
- Department of Nuclear Medicine, Taipei Medical University Hospital, Taipei, Taiwan
| | - Chuang-Hsin Chiu
- Department of Nuclear Medicine, Tri-Service General Hospital, Taipei, Taiwan
| | - Tsung-Hsun Yu
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | | | - Chi-Jung Tsai
- Department of Nuclear Medicine, Taipei Medical University Hospital, Taipei, Taiwan
- *Correspondence: Kuo-Hsing Ma,
| | - Cheng-Yi Cheng
- Department of Nuclear Medicine, Tri-Service General Hospital, Taipei, Taiwan
- *Correspondence: Kuo-Hsing Ma,
| | - Kuo-Hsing Ma
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan
- *Correspondence: Kuo-Hsing Ma,
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Huang WS, Chen GJ, Tsai TH, Cheng CY, Shiue CY, Ma KH, Yeh SHH. In vivo long-lasting alterations of central serotonin transporter activity and associated dopamine synthesis after acute repeated administration of methamphetamine. EJNMMI Res 2019; 9:92. [PMID: 31535286 PMCID: PMC6751231 DOI: 10.1186/s13550-019-0557-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 08/23/2019] [Indexed: 11/22/2022] Open
Abstract
Background Methamphetamine (METH)-associated alterations in the striatal dopamine (DA) system or dopamine transport (DAT) have been identified in clinical and preclinical studies with positron emission tomography (PET) imaging but have not been well correlated with in vivo serotonin transporter (SERT) availability due to the lack of appropriate imaging agents to assess SERTs. N,N-dimethyl-2-(2-amino-4-[18F]-fluorophenylthio) benzylamine (4-[18F]-ADAM) has been developed by our group and validated for its high affinity and selectivity for SERTs, allowing the in vivo examination of SERT density, location, and binding function. The aims of this study were to investigate the potential of SERT imaging using 4-[18F]-ADAM PET to estimate the long-lasting effects of METH-induced serotonergic neurotoxicity, and further determine whether a correlative relationship exists between SERT availability/activity and tyrosine hydroxylase (TH) activity in various brain regions due to the long-lasting consequences of METH treatment. Results Male rats received four administrations of METH (5 or 10 mg/kg, s.c.) or saline (1 ml/kg, s.c.) at 1-h intervals. At 30 days post-administration, in vivo SERT availability and activity were measured by 4-[18F]ADAM PET imaging. In contrast to the controls, the uptake of 4-[18F]ADAM in METH-treated mice was significantly reduced in a dose-dependent manner in the midbrain, followed by the hypothalamus, thalamus, striatum, hippocampus, and frontal cortex. The regional effects of METH on TH activity were assessed by quantitative immunohistochemistry and presented as integrated optical density (IOD). A significant decrease in TH immunostaining and IOD ratios was seen in the caudate, putamen, nucleus accumbens, substantia nigra pars compacta, and substantia nigra pars reticulata in the METH-treated rats compared to controls. Conclusion The present results suggested that the long-lasting response to METH decreased the uptake of 4-[18F]-ADAM and varied regionally along with TH immunoreactivity. In addition, 4-[18F]ADAM PET could be used to detect serotonergic neuron loss and to evaluate the severity of serotonergic neurotoxicity of METH.
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Affiliation(s)
- Wen-Sheng Huang
- Department of Nuclear Medicine, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Beitou District, Taipei City, 11217, Taiwan, Republic of China.,Nuclear Medicine Department, Tri-Service General Hospital, Taipei, Taiwan
| | - Guann-Juh Chen
- Department of Neurological Surgery, National Defense Medical Center, Tri-Service General Hospital, No. 325, Sec. 2, Chenggong Rd., Neihu District, Taipei City, 11490, Taiwan, Republic of China.,Department of Neurological Surgery, Chiayi Branch, Taichung Veterans General Hospital, No. 600, Sec. 2, Shixian Rd., West District, Chiayi City, 60090, Taiwan, Republic of China
| | - Tung-Han Tsai
- Department of Neurological Surgery, National Defense Medical Center, Tri-Service General Hospital, No. 325, Sec. 2, Chenggong Rd., Neihu District, Taipei City, 11490, Taiwan, Republic of China
| | - Chen-Yi Cheng
- Nuclear Medicine Department, Tri-Service General Hospital, Taipei, Taiwan
| | - Chyng-Yann Shiue
- Department of Nuclear Medicine, National Taiwan University Hospital, No. 1, Changde St., Zhongzheng District, Taipei City, 10048, Taiwan, Republic of China
| | - Kuo-Hsing Ma
- Department of Anatomy and Biology, National Defense Medical Center, No. 161, Sec. 6, Minquan E. Rd., Neihu District, Taipei City, 11490, Taiwan, Republic of China.
| | - Skye Hsin-Hsien Yeh
- Brain Research Center, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei City, 112, Taiwan, Republic of China.
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Qiao H, Zhang Y, Wu Z, Zhu L, Choi SR, Ploessl K, Kung HF. One-step preparation of [(18)F]FPBM for PET imaging of serotonin transporter (SERT) in the brain. Nucl Med Biol 2016; 43:470-7. [PMID: 27236282 DOI: 10.1016/j.nucmedbio.2016.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/16/2016] [Accepted: 04/14/2016] [Indexed: 01/27/2023]
Abstract
Serotonin transporters (SERT) in the brain play an important role in normal brain function. Selective serotonin reuptake inhibitors such as fluoxetine, sertraline, paroxetine, escitalopram, etc., specifically target SERT binding in the brain. Development of SERT imaging agents may be useful for studying the function of SERT by in vivo imaging. A one-step preparation of [(18)F]FPBM, 2-(2'-(dimethylamino)methyl)-4'-(3-([(18)F]fluoropropoxy)phenylthio)benzenamine, for positron emission tomography (PET) imaging of SERT binding in the brain was achieved. An active OTs intermediate, 9, was reacted with [(18)F]F(-)/K222 to produce [(18)F]FPBM in one step and in high radiochemical yield. This labeling reaction was evaluated and optimized under different temperatures, bases, solvents, and varying amounts of precursor 9. The radiolabeling reaction led to the desired [(18)F]FPBM in one step and the crude product was purified by HPLC purification to give no-carrier-added [(18)F]FPBM (radiochemical yield, 24-33%, decay corrected; radiochemical purity >99%). PET imaging studies in normal monkeys (n=4) showed fast, pronounced uptakes in the midbrain and thalamus, regions known to be rich in SERT binding sites. A displacement experiment with escitalopram (5mg/kg iv injection at 30min after [(18)F]FPBM injection) showed a rapid and complete reversal of SERT binding, suggesting that binding by [(18)F]FPBM was highly specific and reversible. A one-step radiolabeling method coupled with HPLC purification for preparation of [(18)F]FPBM was developed. Imaging studies suggest that it is feasible to use this method to prepare [(18)F]FPBM for in vivo PET imaging of SERT binding in the brain.
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Affiliation(s)
- Hongwen Qiao
- Department of Neurobiology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China; Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China; Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Yan Zhang
- Key Laboratory of Radiopharmaceuticals, Beijing Normal University, Ministry of Education, Beijing, 100875, China
| | - Zehui Wu
- Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China; Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Lin Zhu
- Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China; Key Laboratory of Radiopharmaceuticals, Beijing Normal University, Ministry of Education, Beijing, 100875, China; Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Seok Rye Choi
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Karl Ploessl
- Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hank F Kung
- Beijing Institute for Brain Disorders, Capital Medical University, Beijing, 100069, China; Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA.
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Fully automated one-pot two-step synthesis of 4-[ 18 F]-ADAM, a potent serotonin transporter imaging agent. Appl Radiat Isot 2016; 110:8-15. [DOI: 10.1016/j.apradiso.2015.12.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 12/15/2015] [Accepted: 12/20/2015] [Indexed: 11/19/2022]
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Weng SJ, Li IH, Huang YS, Chueh SH, Chou TK, Huang SY, Shiue CY, Cheng CY, Ma KH. KA-bridged transplantation of mesencephalic tissue and olfactory ensheathing cells in a Parkinsonian rat model. J Tissue Eng Regen Med 2015; 11:2024-2033. [PMID: 26510988 DOI: 10.1002/term.2098] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 06/15/2015] [Accepted: 09/15/2015] [Indexed: 11/07/2022]
Abstract
The pathology of Parkinson's disease (PD) results mainly from nigrostriatal pathway damage. Unfortunately, commonly used PD therapies do not repair the disconnected circuitry. It has been reported that using kainic acid (KA, an excitatory amino acid) in bridging transplantation may be useful to generate an artificial tract and reconstruct the nigrostriatal pathway in 6-hydroxydopamine (6-OHDA) lesioned rats. In this study, we used KA bridging and a co-graft of rat olfactory ensheathing cells (OECs) and rat E14 embryonic ventral mesencephalic (VM) tissue to restore the nigrostriatal pathway of the PD model rats. The methamphetamine-induced rotational behaviour, 4-[18 F]-ADAM (a selectively serotonin transporter radioligand)/micro-PET imaging, and immunohistochemistry were used to assess the effects of the transplantation. At 9 weeks post-grafting in PD model rats, the results showed that the PD rats undergoing VM tissue and OECs co-grafts (VM-OECs) exhibited better motor recovery compared to the rats receiving VM tissue transplantation only. The striatal uptake of 4-[18 F]-ADAM and tyrosine hydroxylase immunoreactivity (TH-ir) of the grafted area in the VM-OECs group were also more improved than those of the VM alone group. These results suggested that OECs may enhance the survival of the grafted VM tissue and facilitate the recovery of motor function after VM transplantation. Moreover, OECs possibly promote the elongation of dopaminergic and serotonergic axon in the bridging graft. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- Shao-Ju Weng
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - I-Hsun Li
- Department of Pharmacy Practice, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - Yuahn-Sieh Huang
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - Sheau-Huei Chueh
- Department of Biochemistry, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - Ta-Kai Chou
- Department of Nuclear Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - San-Yuan Huang
- Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - Chyng-Yann Shiue
- Department of Nuclear Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - Cheng-Yi Cheng
- Department of Nuclear Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China
| | - Kuo-Hsing Ma
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan, Republic of China
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Huang YY, Cheng CY, Huang WS, Ma KH, Tseng TW, Chou TK, Huang Y, Shiue CY. Toxicity and radiation dosimetry studies of the serotonin transporter radioligand [(18) F]AFM in rats and monkeys. EJNMMI Res 2015; 4:71. [PMID: 26116128 PMCID: PMC4452647 DOI: 10.1186/s13550-014-0071-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 11/27/2014] [Indexed: 11/12/2022] Open
Abstract
Background [18 F]AFM is a potent and promising PET imaging agent for the serotonin transporter. We carried out an acute toxicity study in rats and radiation dosimetry in monkeys before the translation of the tracer to humans. Methods Single- and multiple-dose toxicity studies were conducted in Sprague–Dawley rats. Male and female rats were injected intravenously with AFM tartrate as a single dose of 98.7 or 987 μg/kg (592 or 5,920 μg/m2, 100× or 1,000× the proposed human dose of 8 μg, respectively) on day 1 or as five consecutive daily doses of 98.7 μg/kg/day (592 μg /m2/day, 100× human dose, total dose 493.5 μg/kg). PET/CT scans were performed in four Formosan rock monkeys (two males and two females, each monkey scanned twice) using a Siemens BIOGRAPH scanner. After injection of [18 F]AFM (88.5 ± 20.3 MBq), a low-dose CT scan and a series of eight whole-body PET scans in 3-D mode were performed. Time-activity data of source organs were used to calculate the residence times and estimate the absorbed radiation dose using the OLINDA/EXM software. Results In the rats, neither the single dose nor the five daily doses of AFM tartrate produced overt adverse effects clinically. In the monkeys, the radiation doses received by most organs ranged between 8.3 and 39.1 μGy/MBq. The osteogenic cells, red marrow, and lungs received the highest doses of 39.1, 35.4, and 35.1 μGy/MBq, respectively. The effective doses extrapolated to male and female adult humans were 18.0 and 18.3 μSv/MBq, respectively. Conclusions Toxicity studies in Sprague–Dawley rats and radiation dosimetry studies in Formosa rock monkeys suggest that [18 F]AFM is safe for use in human PET imaging studies. Trial registration IACUC-12-200.
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Affiliation(s)
- Ya-Yao Huang
- PET Center, Department of Nuclear Medicine, Tri-Service General Hospital, 325 Sec. 2, Cheng-Kung Road, Taipei, 114, Taiwan,
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Chiu CH, Li IH, Weng SJ, Huang YS, Wu SC, Chou TK, Huang WS, Liao MH, Shiue CY, Cheng CY, Ma KH. PET Imaging of Serotonin Transporters With 4-[(18)F]-ADAM in a Parkinsonian Rat Model With Porcine Neural Xenografts. Cell Transplant 2015; 25:301-11. [PMID: 25994923 DOI: 10.3727/096368915x688236] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Parkinson's disease (PD) is a neurodegenerative disease characterized by a loss of dopaminergic neurons in the nigrostriatal pathway. Apart from effective strategies to halt the underlying neuronal degeneration, cell replacement now offers novel prospects for PD therapy. Porcine embryonic neural tissue has been considered an alternative source to human fetal grafts in neurodegenerative disorders because its use avoids major practical and ethical issues. This study was undertaken to evaluate the effects of embryonic day 27 (E27) porcine mesencephalic tissue transplantation in a PD rat model using animal positron emission tomography (PET) coupled with 4-[(18)F]-ADAM, a serotonin transporter (SERT) imaging agent. The parkinsonian rat was induced by injecting 6-hydroxydopamine into the medial forebrain bundle (MFB) of the right nigrostriatal pathway. The apomorphine-induced rotation behavioral test and 4-[(18)F]-ADAM/animal PET scanning were carried out following 6-OHDA lesioning. At the second week following 6-OHDA lesioning, the parkinsonian rat rotates substantially on apomorphine-induced contralateral turning. In addition, the mean striatal-specific uptake ratio (SUR) of 4-[(18)F]-ADAM decreased by 44%. After transplantation, the number of drug-induced rotations decreased markedly, and the mean SUR of 4-[(18)F]-ADAM and the level of SERT immunoreactivity (SERT-ir) in striatum were partially restored. The mean SUR level was restored to 71% compared to that for the contralateral intact side, which together with the abundant survival of tyrosine hydroxylase (TH) neurons accounted for functional recovery at the fourth week postgraft. In regard to the extent of donor-derived cells, we found the neurons of the xenografts from E27 transgenic pigs harboring red fluorescent protein (RFP) localized with TH-ir cells and SERT-ir in the grafted area. Thus, transplanted E27 porcine mesencephalic tissue may restore dopaminergic and serotonergic systems in the parkinsonian rat. The 4-[(18)F]-ADAM/animal PET can be used to detect serotonergic neuron loss in PD and monitor the efficacy of therapy.
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Affiliation(s)
- Chuang-Hsin Chiu
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
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Wu X, Cai H, Ge R, Li L, Jia Z. Recent progress of imaging agents for Parkinson's disease. Curr Neuropharmacol 2014; 12:551-63. [PMID: 25977680 PMCID: PMC4428027 DOI: 10.2174/1570159x13666141204221238] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 11/22/2014] [Accepted: 12/02/2014] [Indexed: 02/05/2023] Open
Abstract
Parkinson's disease (PD) is a common progressive, neurodegenerative brain disease that is promoted by mitochondrial dysfunction, oxidative stress, protein aggregation and proteasome dysfunction in the brain. Compared with computer tomography (CT) or magnetic resonance imaging (MRI), non-invasive nuclear radiopharmaceuticals have great significance for the early diagnosis of PD due to their high sensitivity and specificity in atypical and preclinical cases. Based on the development of coordination chemistry and chelator design, radionuclides may be delivered to lesions by attaching to PD-related transporters and receptors, such as dopamine, serotonin, and others. In this review, we comprehensively detailed the current achievements in radionuclide imaging in Parkinson's disease.
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Affiliation(s)
- Xiaoai Wu
- Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, P.R. China
| | - Huawei Cai
- Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, P.R. China
| | - Ran Ge
- Department of Nuclear Medicine, Fujian Medical University Union Hospital, Fuzhou, P.R. China
| | - Lin Li
- Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, P.R. China
| | - Zhiyun Jia
- Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, P.R. China
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Kang HH, Wang CH, Chen HC, Li IH, Cheng CY, Liu RS, Huang WS, Shiue CY, Ma KH. Investigating the effects of noise-induced hearing loss on serotonin transporters in rat brain using 4-[18F]-ADAM/small animal PET. Neuroimage 2013; 75:262-269. [DOI: 10.1016/j.neuroimage.2012.06.049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 06/08/2012] [Accepted: 06/26/2012] [Indexed: 01/10/2023] Open
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Stehouwer JS, Goodman MM. 11C and18F PET radioligands for the serotonin transporter (SERT). J Labelled Comp Radiopharm 2013; 56:114-9. [DOI: 10.1002/jlcr.3011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 10/29/2012] [Accepted: 11/20/2012] [Indexed: 01/03/2023]
Affiliation(s)
- Jeffrey S. Stehouwer
- Center for Systems Imaging, Department of Radiology and Imaging Sciences; Emory University; Atlanta; GA; USA
| | - Mark M. Goodman
- Center for Systems Imaging, Department of Radiology and Imaging Sciences; Emory University; Atlanta; GA; USA
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Weng SJ, Shiue CY, Huang WS, Cheng CY, Huang SY, Li IH, Tao CC, Chou TK, Liao MH, Chang YP, Ma KH. PET imaging of serotonin transporters with 4-[18F]-ADAM in a Parkinsonian rat model. Cell Transplant 2012; 22:1295-305. [PMID: 23127756 DOI: 10.3727/096368912x658683] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
This study was undertaken to address the effects of fetal mesencephalic tissue transplantation on the serotonin system in a rat model of Parkinson's disease (PD) while also investigating the usefulness of 4-[18F]-ADAM (a serotonin transporter imaging agent) coupled with micro-PET for imaging serotonin transporters (SERTs). A PD model was induced by unilateral injection of 6-hydroxydopamine (6-OHDA) into the right medial forebrain bundle of the nigrostriatal pathway, while cell transplantation was performed via intrastriatal injection of mesencephalic brain tissue dissected from embryonic (E14) rats. The 4-[18F]-ADAM/micro-PET scanning was performed following both 6-OHDA lesioning and transplantation. Immunohistochemistry (IHC) studies were also performed following the final PET scan, and the results were compared to show a 17-43% decrease in the specific uptake ratio (SUR) and a 23-52% decrease in serotonin transporter immunoreactivity (SERT-ir) within various brain regions on the lesioned side. The number of methamphetamine-induced rotations also decreased significantly at the 4th week postgraft. In addition, striatal SUR and the SERT-ir levels were restored to 77% and 83% 5 weeks postgraft. These results suggest that Parkinson's disease also affects the serotonergic system, while both the dopaminergic and serotonergic systems can be partially restored in a rat model of PD after E14 mesencephalic tissue transplantation. In addition, we have also determined that 4-[18F]-ADAM/micro-PET can be used to detect serotonergic neuron loss, monitor the progress of Parkinson's disease, and oversee the effectiveness of therapy.
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Affiliation(s)
- Shao-Ju Weng
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
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14
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Huang WS, Huang SY, Ho PS, Ma KH, Huang YY, Yeh CB, Liu RS, Cheng CY, Shiue CY. PET imaging of the brain serotonin transporters (SERT) with N,N-dimethyl-2-(2-amino-4-[18F]fluorophenylthio)benzylamine (4-[18F]-ADAM) in humans: a preliminary study. Eur J Nucl Med Mol Imaging 2012; 40:115-24. [PMID: 23053324 DOI: 10.1007/s00259-012-2250-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 09/03/2012] [Indexed: 10/27/2022]
Abstract
PURPOSE The aim of this study was to assess the feasibility of using 4-[(18)F]-ADAM as a brain SERT imaging agent in humans. METHODS Enrolled in the study were 19 healthy Taiwanese subjects (11 men, 8 women; age 33 ± 9 years). The PET data were semiquantitatively analyzed and expressed as specific uptake ratios (SUR) and distribution volume ratios (DVR) using the software package PMOD. The SUR and DVR of 4-[(18)F]-ADAM in the raphe nucleus (RN), midbrain (MB), thalamus (TH), striatum (STR) and prefrontal cortex (PFC) were determined using the cerebellum (CB) as the reference region. RESULTS 4-[(18)F]-ADAM bound to known SERT-rich regions in human brain. The order of the regional brain uptake was MB (RN) > TH > STR > PFC > CB. The DVR (n = 4, t* = 60 min) in the RN, TH, STR and PFC were 3.00 ± 0.50, 2.25 ± 0.45, 2.05 ± 0.31 and 1.40 ± 0.13, respectively. The optimal time for imaging brain SERT with 4-[(18)F]-ADAM was 120-140 min after injection. At the optimal imaging time, the SURs (n = 15) in the MB, TH, STR, and PFC were 2.25 ± 0.20, 2.28 ± 0.20, 2.12 ± 0.18 and 1.47 ± 0.14, respectively. There were no significant differences in SERT availability between men and women (p < 0.05). CONCLUSION The results of this study showed that 4-[(18)F]-ADAM was safe for human studies and its distribution in human brain appeared to correlate well with the known distribution of SERT in the human brain. In addition, it had high specific binding and a reasonable optimal time for imaging brain SERT in humans. Thus, 4-[(18)F]-ADAM may be feasible for assessing the status of brain SERT in humans.
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Affiliation(s)
- Wen-Sheng Huang
- Department of Nuclear Medicine, PET Center, Tri-Service General Hospital, 325 Sec. 2 Cheng-Kung Rd, Neihu, Taipei, Taiwan
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15
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Synthesis and comparison of 4-[18F]F-ADAM, 2-[18F]F-ADAM, N-Desmethyl-4-[18F]F-ADAM and [18F]F-AFM as serotonin transporter imaging agents. Appl Radiat Isot 2012; 70:2298-307. [DOI: 10.1016/j.apradiso.2012.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 04/25/2012] [Accepted: 06/05/2012] [Indexed: 11/22/2022]
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16
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Characterization of 4-[18F]-ADAM as an imaging agent for SERT in non-human primate brain using PET: a dynamic study. Nucl Med Biol 2012; 39:279-85. [DOI: 10.1016/j.nucmedbio.2011.08.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 07/21/2011] [Accepted: 08/01/2011] [Indexed: 11/21/2022]
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17
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Apana SM, Griffin RJ, Koonce NA, Webber JS, Dings RPM, Mayo KH, Berridge MS. Synthesis of [18F]anginex with high specific activity [18F]fluorobenzaldehyde for targeting angiogenic activity in solid tumors. J Labelled Comp Radiopharm 2011. [DOI: 10.1002/jlcr.1912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Scott M. Apana
- 3D Imaging, LLC; Cyclotron Suite Rm PS010, UAMS Radiology #556, 4301 W. Markham Street; Little Rock; AR; 72205-7199; USA
| | - Robert J. Griffin
- Department of Radiation Oncology; University of Arkansas for Medical Sciences; Little Rock; AR; USA
| | - Nathan A. Koonce
- Department of Radiation Oncology; University of Arkansas for Medical Sciences; Little Rock; AR; USA
| | - Jessica S. Webber
- Department of Radiation Oncology; University of Arkansas for Medical Sciences; Little Rock; AR; USA
| | - Ruud P. M. Dings
- Department of Biochemistry, Molecular Biology, and Biophysics; University of Minnesota; Minneapolis; MN; USA
| | - Kevin H. Mayo
- Department of Biochemistry, Molecular Biology, and Biophysics; University of Minnesota; Minneapolis; MN; USA
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18
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Paterson LM, Kornum BR, Nutt DJ, Pike VW, Knudsen GM. 5-HT radioligands for human brain imaging with PET and SPECT. Med Res Rev 2011; 33:54-111. [PMID: 21674551 DOI: 10.1002/med.20245] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The serotonergic system plays a key modulatory role in the brain and is the target for many drug treatments for brain disorders either through reuptake blockade or via interactions at the 14 subtypes of 5-HT receptors. This review provides the history and current status of radioligands used for positron emission tomography (PET) and single photon emission computerized tomography (SPECT) imaging of human brain serotonin (5-HT) receptors, the 5-HT transporter (SERT), and 5-HT synthesis rate. Currently available radioligands for in vivo brain imaging of the 5-HT system in humans include antagonists for the 5-HT(1A), 5-HT(1B), 5-HT(2A), and 5-HT(4) receptors, and for SERT. Here we describe the evolution of these radioligands, along with the attempts made to develop radioligands for additional serotonergic targets. We describe the properties needed for a radioligand to become successful and the main caveats. The success of a PET or SPECT radioligand can ultimately be assessed by its frequency of use, its utility in humans, and the number of research sites using it relative to its invention date, and so these aspects are also covered. In conclusion, the development of PET and SPECT radioligands to image serotonergic targets is of high interest, and successful evaluation in humans is leading to invaluable insight into normal and abnormal brain function, emphasizing the need for continued development of both SPECT and PET radioligands for human brain imaging.
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Affiliation(s)
- Louise M Paterson
- Neuropsychopharmacology Unit, Division of Experimental Medicine, Imperial College London, Burlington Danes Building, Du Cane Road, London, United Kingdom
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Wang JL, Oya S, Parhi AK, Lieberman BP, Ploessl K, Hou C, Kung HF. In vivo studies of the SERT-selective [18F]FPBM and VMAT2-selective [18F]AV-133 radiotracers in a rat model of Parkinson's disease. Nucl Med Biol 2010; 37:479-86. [PMID: 20447560 DOI: 10.1016/j.nucmedbio.2010.01.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 01/14/2010] [Accepted: 01/27/2010] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The utility of [(18)F]FPBM [2-(2'-((dimethylamino)methyl)-4'-(3-[(18)F]-fluoropropoxy)phenylthio)benzenamine], a selective serotonin transporter (SERT) tracer, and [(18)F]AV-133 [(+)-2-Hydroxy-3-isobutyl-9-(3-fluoropropoxy)-10-methoxy-1,2,3,4,6,7-hexahydro-11bH-benzo[a]quinolizine], a selective vesicular monoamine transporter 2 (VMAT2) tracer, were tested in the 6-hydroxydopamine (6-OHDA) unilateral lesioned rat model. METHODS Positron emission tomography (PET) imaging of three 6-OHDA unilateral lesioned male Sprague Dawley rats (Rats 1-3) were performed with [(18)F]FPBM and [(18)F]AV-133 to examine whether changes in SERT and VMAT2 binding, respectively, could be detected in the brain. The brains of the three rats were then removed and examined by in vitro autoradiography with [(18)F]FPBM and the dopamine transporter ligand, [(125)I]IPT [N-(3'-[(125)I]-iodopropen-2'-yl)-2-beta-carbomethoxy-3-beta-(4-chloro phenyl) tropane, for confirmation. Biodistribution of [(18)F]FPBM in a separate group of p-chloroamphetamine (PCA) treated rats were also performed. RESULTS PET image analysis showed varying levels of SERT binding reduction (Rat 1=-11%, Rat 2=-4%, Rat 3=-43%; n=2) and a clear and definitive loss of VMAT2 binding (Rat 1=-87%, Rat 2=-72%, and Rat 3=-91%; n=1) in the left striatum when compared to the right (non-lesioned side) striatum. The results from PET imaging were corroborated with quantitative in vitro autoradiography. Rats treated with a selective serotonin toxin (p-chloroamphetamine) showed a significant reduction of [(18)F]FPBM uptake in the cortex and hypothalamus regions of the brain. CONCLUSION The preliminary data suggest that [(18)F]FPBM and [(18)F]AV-133 may be useful for the examination of serotonergic and dopaminergic neuron integrity, respectively, in the living brain.
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Affiliation(s)
- Julie L Wang
- Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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Berridge MS, Apana SM, Hersh JM. Teflon radiolysis as the major source of carrier in fluorine-18. J Labelled Comp Radiopharm 2009. [DOI: 10.1002/jlcr.1672] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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