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Luan W, Liu X, Wang X, An Y, Wang Y, Wang C, Shen K, Xu H, Li S, Liu M, Yu LU. Inhibition of Drug Resistance of Staphylococcus aureus by Efflux Pump Inhibitor and Autolysis Inducer to Strengthen the Antibacterial Activity of β-lactam Drugs. Pol J Microbiol 2019; 68:477-491. [PMID: 31880892 PMCID: PMC7260704 DOI: 10.33073/pjm-2019-047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 09/20/2019] [Accepted: 09/21/2019] [Indexed: 01/17/2023] Open
Abstract
This study explored a potential treatment against methicillin-resistant Staphylococcus aureus (MRSA) infections that combines thioridazine (TZ), an efflux pump inhibitor, and miconazole (MCZ), an autolysis inducer, with the anti-microbial drug cloxacillin (CXN). In vitro, the combination treatment of TZ and MCZ significantly reduced 4096-fold (Σ (FIC) = 0.1 – 1.25) the MIC value of CXN against S. aureus. In vivo, the combination therapy significantly relieved breast redness and swelling in mice infected with either clinical or standard strains of S. aureus. Meanwhile, the number of bacteria isolated from the MRSA135-infected mice decreased significantly (p = 0.0427 < 0.05) after the combination therapy when compared to monotherapy. Moreover, the number of bacteria isolated from the mice infected with a reference S. aureus strain also decreased significantly (p = 0.0191 < 0.05) after the combination therapy when compared to monotherapy. The pathological changes were more significant in the CXN-treated group when compared to mice treated with a combination of three drugs. In addition, we found that combination therapy reduced the release of the bacteria-stimulated cytokines such as IL-6, IFN-γ, and TNF-α. Cytokine assays in serum revealed that CXN alone induced IL-6, IFN-γ, and TNF-α in the mouse groups infected with ATCC 29213 or MRSA135, and the combination of these three drugs significantly reduced IL-6, IFN-γ, and TNF-α concentrations. Also, the levels of TNF-α and IFN-γ in mice treated with a combination of three drugs were significantly lower than in the CXN-treated group. Given the synergistic antibacterial activity of CXN, we concluded that the combination of CXN with TZ, and MCZ could be developed as a novel therapeutic strategy against S. aureus.
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Affiliation(s)
- Wenjing Luan
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
| | - Xiaolei Liu
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
| | - Xuefei Wang
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
| | - Yanan An
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
| | - Yang Wang
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
| | - Chao Wang
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
| | - Keshu Shen
- Jilin Hepatobiliary Hospital , Changchun , China
| | - Hongyue Xu
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
| | - Shulin Li
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
| | - Mingyuan Liu
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China ; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses , Yangzhou , China
| | - L U Yu
- Key Laboratory for Zoonosis Research, Ministry of Education, Institute of Zoonosis, Department of Infectious Diseases of First Hospital of Jilin University, College of Veterinary Medicine Jilin University , Changchun , China
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Abstract
PURPOSE The aim of this study was to determine whether the brain uptake of [(18)F]Mefway is influenced by the action of P-glycoprotein (P-gp) and breast cancer resistance protein (Bcrp) in rodents. PROCEDURES [(18)F]Mefway was applied to rats pharmacologically inhibited with tariquidar (TQD) and to genetically disrupted mice. RESULTS Pretreatment of TQD results in 160% higher hippocampal uptake compared with control rats. In genetically disrupted mice, a maximal brain uptake value of 3.2 SUV in the triple knockout mice (tKO, Mdr1a/b((-/-))Bcrp1((-/-))) was comparable to that of the double knockout mice (dKO, Mdr1a/b((-/-))) and 2-fold those of the wild-type and Bcrp1((-/-)) knockout mice. The differences of binding values were statistically insignificant between control and experimental groups. The brain-to-plasma ratios for tKO mice were also two to five times higher than those for other groups. CONCLUSIONS [(18)F]Mefway is modulated by P-gp, and not by Bcrp in rodents.
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Pretze M, Pallavi P, Roscher M, Klotz S, Caballero J, Binzen U, Greffrath W, Treede RD, Harmsen MC, Hafner M, Yard B, Wängler C, Wängler B. Radiofluorinated N-Octanoyl Dopamine ([ 18F]F-NOD) as a Tool To Study Tissue Distribution and Elimination of NOD in Vitro and in Vivo. J Med Chem 2016; 59:9855-9865. [PMID: 27731639 DOI: 10.1021/acs.jmedchem.6b01191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To mitigate pretransplantation injury in organs of potential donors, N-octanoyl dopamine (NOD) treatment might be considered as it does not affect hemodynamic parameters in braindead (BD) donors. To better assess optimal NOD concentrations for donor treatment, we report on the fast and facile radiofluorination of the NOD-derivative [18F]F-NOD [18F]5 for in vivo assessment of NOD's elimination kinetics by means of PET imaging. [18F]5 was synthesized in reproducibly high radiochemical yields and purity (>98%) as well as high specific activities (>20 GBq/μmol). Stability tests showed no decomposition of [18F]5 over a period of 120 min in rat plasma. In vitro, low cell association was found for [18F]5, indicating no active transport mechanism into cells. In vivo, [18F]5 exhibited a fast blood clearance and a predominant hepatobiliary elimination. As these data suggest that also NOD might be cleared fast, further pharmacokinetic evaluation is warranted.
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Affiliation(s)
| | - Prama Pallavi
- Institute for Molecular and Cellular Biology, Mannheim University of Applied Sciences , Mannheim 68163, Germany
| | | | | | - Julio Caballero
- Center for Bioinformatics and Molecular Simulations, Faculty of Engineering in Bioinformatics, Universidad de Talca , Talca 07101, Chile
| | | | | | | | - Martin C Harmsen
- University of Groningen , University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen 9713 GZ, The Netherlands
| | - Mathias Hafner
- Institute for Molecular and Cellular Biology, Mannheim University of Applied Sciences , Mannheim 68163, Germany
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Mukherjee J, Bajwa AK, Wooten DW, Hillmer AT, Pan ML, Pandey SK, Saigal N, Christian BT. Comparative assessment of (18) F-Mefway as a serotonin 5-HT1A receptor PET imaging agent across species: Rodents, nonhuman primates, and humans. J Comp Neurol 2016; 524:1457-71. [PMID: 26509362 PMCID: PMC4783179 DOI: 10.1002/cne.23919] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 08/22/2015] [Accepted: 10/23/2015] [Indexed: 02/02/2023]
Abstract
We have developed (18) F-trans-Mefway ((18) F-Mefway) for positron emission tomography (PET) imaging studies of serotonin 5-HT1A receptors which are implicated in various brain functions. Translation of imaging the 5-HT1A receptor in animal models to humans will facilitate an understanding of the role of the receptor in human brain disorders. We report comparative brain distribution of (18) F-Mefway in normal mice, rats, monkeys, and healthy human volunteers. Mefway was found to be very selective, with subnanomolar affinity for the 5-HT1A receptor. Affinities of >55 nM were found for all other human-cloned receptor subtypes tested. Mefway was found to be a poor substrate (>30 μM) for the multidrug resistance 1 protein, suggesting low likelihood of brain uptake being affected by P-glycoprotein. Cerebellum was used as a reference region in all imaging studies across all species due to the low levels of (18) F-Mefway binding. Consistent binding of (18) F-Mefway in cortical regions, hippocampus, and raphe was observed across all species. (18) F-Mefway in the human brain regions correlated with the known postmortem distribution of 5-HT1A receptors. Quantitation of raphe was affected by the resolution of the PET scanners in rodents, whereas monkeys and humans showed a raphe to cerebellum ratio of approximately 3. (18) F-Mefway appears to be an effective 5-HT1A receptor imaging agent in all models, including humans. (18) F-Mefway therefore may be used to quantify 5-HT1A receptor distribution in brain regions for the study of various CNS disorders. J. Comp. Neurol. 524:1457-1471, 2016. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Jogeshwar Mukherjee
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Alisha K Bajwa
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Dustin W Wooten
- Department of Medical Physics and Waisman Center, University of Wisconsin, Madison, Wisconsin, 53705
| | - Ansel T Hillmer
- Department of Medical Physics and Waisman Center, University of Wisconsin, Madison, Wisconsin, 53705
| | - Min-Liang Pan
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Suresh K Pandey
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Neil Saigal
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, 92697-5000
| | - Bradley T Christian
- Department of Medical Physics and Waisman Center, University of Wisconsin, Madison, Wisconsin, 53705
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Lee JH, Ryu YH, Lyoo CH, Choi SH, Kim JJ, Choi JY. Optimal timing of [¹⁸F]Mefway PET for imaging the serotonin 1A receptor in healthy male subjects. Appl Radiat Isot 2015; 107:127-132. [PMID: 26492323 DOI: 10.1016/j.apradiso.2015.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 09/08/2015] [Accepted: 10/04/2015] [Indexed: 11/30/2022]
Abstract
To determine the optimal acquisition time of [(18)F]Mefway PET, we examined the regional specific-to-nonspecific binding ratios and evaluated the relationship between distribution volume ratios (DVRs) and standardized uptake value ratios (SUVRs) in various time windows. The specific-to-nonspecific binding ratios peaked after 40 min and there was a strong correlation between DVR and SUVR in the 60-80 min. Therefore, we recommend the use of a single time point between 60 and 80 min for [(18)F]Mefway static PET.
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Affiliation(s)
- Jae-Hoon Lee
- Department of Nuclear Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Young Hoon Ryu
- Department of Nuclear Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Chul Hyoung Lyoo
- (c)Department of Psychiatry and Institute of Human Behavioral Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Soo-Hee Choi
- (d)Department of Psychiatry and Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae-Jin Kim
- (b)Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae Yong Choi
- Department of Nuclear Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.
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Lee M, Ryu YH, Cho WG, Kang YW, Lee SJ, Jeon TJ, Lyoo CH, Kim CH, Kim DG, Lee K, Choi TH, Choi JY. Relationship between dopamine deficit and the expression of depressive behavior resulted from alteration of serotonin system. Synapse 2015; 69:453-60. [DOI: 10.1002/syn.21834] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 05/07/2015] [Accepted: 06/03/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Minkyung Lee
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
| | - Young Hoon Ryu
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
| | - Won Gil Cho
- Department of Anatomy; Yonsei University Wonju College of Medicine; Wonju Korea
| | - Yeo Wool Kang
- Department of Anatomy; Yonsei University Wonju College of Medicine; Wonju Korea
| | - Soo Jin Lee
- Department of Anatomy; Yonsei University Wonju College of Medicine; Wonju Korea
| | - Tae Joo Jeon
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
| | - Chul Hyoung Lyoo
- Department of Neurology; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
| | - Chul Hoon Kim
- Department of Pharmacology; Yonsei University College of Medicine; Seoul, Korea
- Brain Korea 21 plus Project for Medical Science; Yonsei University College of Medicine; Seoul Korea
| | - Dong Goo Kim
- Department of Pharmacology; Yonsei University College of Medicine; Seoul, Korea
- Brain Korea 21 plus Project for Medical Science; Yonsei University College of Medicine; Seoul Korea
| | - Kyochul Lee
- Department of Molecular Imaging; Korea Institute of Radiological and Medical Sciences; Seoul 139-706 Korea
| | - Tae Hyun Choi
- Department of Molecular Imaging; Korea Institute of Radiological and Medical Sciences; Seoul 139-706 Korea
| | - Jae Yong Choi
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
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Choi JY, Lyoo CH, Kim JS, Kim KM, Kang JH, Choi SH, Kim JJ, Ryu YH. 18F-Mefway PET imaging of serotonin 1A receptors in humans: a comparison with 18F-FCWAY. PLoS One 2015; 10:e0121342. [PMID: 25830772 PMCID: PMC4382022 DOI: 10.1371/journal.pone.0121342] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 01/30/2015] [Indexed: 11/19/2022] Open
Abstract
Introduction The purpose of this research is to evaluate the prospects for the use of 4-(trans-18F-fluoranylmethyl)-N-[2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl]-N-pyridin-2-ylcyclohexane-1-carboxamide (18F-Mefway) in comparison to 18F-trans-4-fluoro-N-2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl]-N-(2-pyridyl)cyclohexanecarboxamide (18F-FCWAY) for the quantification of 5-HT1A receptors in human subjects. Method Five healthy male controls were included for two positron emission tomography (PET) studies: 18F-FCWAY PET after the pretreatment with 500 mg of disulfiram and two months later, 18F-Mefway PET without disulfiram. Regional time-activity curves (TACs) were extracted from nine cortical and subcortical regions in dynamic PET images. Using cerebellar cortex without vermis as reference tissue, in vivo kinetics for both radioligands were compared based on the distribution volume ratio (DVR) calculated by non-invasive Logan graphical analysis and area under the curve ratio of the TACs (AUC ratio). Result Although the pattern of regional uptakes in the 18F-Mefway PET was similar to that of the 18F-FCWAY PET (highest in the hippocampus and lowest in the cerebellar cortex), the amount of regional uptake in 18F-Mefway PET was almost half of that in 18F-FCWAY PET. The skull uptake in 18F-Mefway PET was only 25% of that in 18F-FCWAY PET with disulfiram pretreatment. The regional DVR values and AUC ratio values for 18F-Mefway were 17—40% lower than those of 18F-FCWAY. In contrast to a small overestimation of DVR values by AUC ratio values (< 10%) in 18F-FCWAY PET, the overestimation bias of AUC ratio values was much higher (up to 21%) in 18F-Mefway PET. Conclusion As 18F-Mefway showed lower DVR values and greater overestimation bias of AUC ratio values, 18F-Mefway may appear less favorable than 18F-FCWAY. However, in contrast to 18F-FCWAY, the resistance to in vivo defluorination of 18F-Mefway obviates the need for the use of a defluorination inhibitor. Thus, 18F-Mefway may be a good candidate PET radioligand for 5-HT1A receptor imaging in human.
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Affiliation(s)
- Jae Yong Choi
- Department of Nuclear Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Chul Hyoung Lyoo
- Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jin Su Kim
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Kyeong Min Kim
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Jee Hae Kang
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue Swarthmore, PA, United States of America
| | - Soo-Hee Choi
- Department of Psychiatry and Institute of Human Behavioral Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - Jae-Jin Kim
- Department of Psychiatry and Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Young Hoon Ryu
- Department of Nuclear Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Lee M, Ryu YH, Cho WG, Jeon TJ, Lyoo CH, Kang YW, Lee SJ, Kim CH, Kim DG, Kang JH, Seo YB, Yi CH, Lee K, Choi TH, Choi JY. Dopaminergic neuron destruction reduces hippocampal serotonin 1A receptor uptake of trans -[ 18 F]Mefway. Appl Radiat Isot 2014; 94:30-34. [DOI: 10.1016/j.apradiso.2014.06.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 06/23/2014] [Accepted: 06/25/2014] [Indexed: 11/15/2022]
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Hillmer AT, Wooten DW, Bajwa AK, Higgins AT, Lao PJ, Betthauser TJ, Barnhart TE, Rowley HA, Stone CK, Johnson SC, Mukherjee J, Christian BT. First-in-human evaluation of 18F-mefway, a PET radioligand specific to serotonin-1A receptors. J Nucl Med 2014; 55:1973-9. [PMID: 25453045 DOI: 10.2967/jnumed.114.145151] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
UNLABELLED The serotonin-1A (5-HT1A; 5-HT is 5-hydroxytryptamine) receptor is implicated in an array of neurologic and psychiatric disorders. Current PET radioligands targeting 5-HT1A receptors have limitations hindering widespread PET studies of this receptor system. The 5-HT1A-specific antagonist radioligand N-{2-[4-(2-methoxyphenyl)piperazinyl]ethyl}-N-(2-pyridyl)-N-(trans-4-(18)F-fluoromethylcyclohexane)carboxamide ((18)F-mefway) exhibited promising in vivo properties in rhesus monkeys. The goal of this work was to examine the in vivo cerebral binding profile and metabolism of (18)F-mefway in humans. METHODS Dynamic (18)F-mefway PET data were acquired for 6 healthy volunteers (4 women, 2 men; age, 22-38 y). Scans were initiated with the injection of 192-204 MBq of radiotracer, and data were acquired for 2 h. Venous blood samples were collected and assayed to examine the in vivo metabolism profile of (18)F-mefway. To examine the test-retest variability of (18)F-mefway, a second PET scan was acquired at least 2 wk later for 4 subjects. Regional binding potentials (BPNDs) were calculated with the multilinear reference tissue model, and voxelwise BPND maps were calculated with Logan graphical analysis. Regions surrounding the brain were carefully inspected for uptake of radiolabeled species in bone. RESULTS (18)F-mefway uptake in the brain occurred quickly, with a peak standardized uptake value (SUV) of 1.7. Rapid washout in the cerebellum resulted in SUVs of 0.2 at 120 min, whereas regions with specific 5-HT1A binding exhibited retention of radioligand, yielding SUVs of 0.4-0.9 at 120 min. Rapid metabolism of (18)F-mefway was observed, with no detected (18)F-fluoride ions in plasma. BPND values of 2.4 were measured in the mesial temporal lobe, with values of 1.6 in the insular cortex and 0.7-1.0 in other cortical regions. Stable BPND estimates were obtained using 90 min of dynamic data. Average test-retest variability was 8%. No evidence of radioactivity uptake in bone was observed. CONCLUSION (18)F-mefway exhibits favorable in vivo properties for serotonin 5-HT1A receptor measurements in humans. The simple radiosynthesis, high specific binding profile, and absence of PET signal in bone make (18)F-mefway an attractive radiotracer for PET experiments examining the 5-HT1A receptor in neuropsychiatric disorders and drug intervention.
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Affiliation(s)
- Ansel T Hillmer
- Department of Medical Physics, University of Wisconsin, Madison, Wisconsin Waisman Center for Brain Imaging and Behavior, University of Wisconsin, Madison, Wisconsin
| | - Dustin W Wooten
- Department of Medical Physics, University of Wisconsin, Madison, Wisconsin Waisman Center for Brain Imaging and Behavior, University of Wisconsin, Madison, Wisconsin
| | - Alisha K Bajwa
- Department of Radiological Sciences, University of California, Irvine, California
| | - Andrew T Higgins
- Waisman Center for Brain Imaging and Behavior, University of Wisconsin, Madison, Wisconsin
| | - Patrick J Lao
- Department of Medical Physics, University of Wisconsin, Madison, Wisconsin Waisman Center for Brain Imaging and Behavior, University of Wisconsin, Madison, Wisconsin
| | - Tobey J Betthauser
- Department of Medical Physics, University of Wisconsin, Madison, Wisconsin Waisman Center for Brain Imaging and Behavior, University of Wisconsin, Madison, Wisconsin
| | - Todd E Barnhart
- Department of Medical Physics, University of Wisconsin, Madison, Wisconsin
| | - Howard A Rowley
- Department of Radiology, University of Wisconsin, Madison, Wisconsin
| | - Charles K Stone
- Department of Medicine, University of Wisconsin, Madison, Wisconsin
| | - Sterling C Johnson
- Department of Geriatrics, University of Wisconsin, Madison, Wisconsin; and
| | - Jogeshwar Mukherjee
- Department of Radiological Sciences, University of California, Irvine, California
| | - Bradley T Christian
- Department of Medical Physics, University of Wisconsin, Madison, Wisconsin Waisman Center for Brain Imaging and Behavior, University of Wisconsin, Madison, Wisconsin Department of Psychiatry, University of Wisconsin, Madison, Wisconsin
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Choi JY, Kim BS, Kim CH, Kim DG, Han SJ, Lee K, Kim KM, An G, Choi TH, Yoo SD, Ryu YH. Translational possibility of [ 18 F]Mefway to image serotonin 1A receptors in humans: Comparison with [ 18 F]FCWAY in rodents. Synapse 2014; 68:595-603. [PMID: 25056144 DOI: 10.1002/syn.21771] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 07/15/2014] [Accepted: 07/21/2014] [Indexed: 11/09/2022]
Abstract
PURPOSE To compare the cerebral uptake and binding potential of [18 F]FCWAY and [18 F]Mefway in the rodent to assess their potential for imaging serotonin 1A (5-HT1A ) receptors. MATERIALS AND METHODS In vitro liver microsomal studies were performed to evaluate the degree of defluorination. Dynamic positron emission tomography (PET) studies were then conducted for 2 h with or without an anti-defluorination agent. The regions of interest were the hippocampus and frontal cortex (5-HT1A target regions) and the cerebellum (5-HT1A nontarget region). The in vivo kinetics of the radioligands were compared based on the brain uptake values and target-to-nontarget ratio. We also performed a comparison of binding potential (BPND ) as a steady-state binding parameter. Finally, binding affinities to 5-HT1A receptors were assessed in Chinese hamster ovary cells (CHO-K1) cells expressing human recombinant 5-HT1A receptors. RESULTS The radiochemical yield of [18 F]Mefway was slightly higher than that of [18 F]FCWAY (19 vs. 15%). With regard to metabolic stability against defluorination, both compounds exhibited similar stability in rat liver microsomes, but [18 F]Mefway displayed higher stability in the human microsome (defluorination ratio at 30 min: 32 vs. 29 in rat liver microsomes, 31 vs. 64 in human liver microsomes for [18 F]Mefway and [18 F]FCWAY, respectively). There were no significant differences in brain uptake, the target-to-nontarget ratios, and the BPND (at hippocampus, peak brain uptakes: 6.9 vs. 8.5, target-to-nontarget ratios: 6.9 vs. 8.5, BPND : 5.2 vs. 6.2 for [18 F]Mefway and [18 F]FCWAY). The binding affinity of [18 F]Mefway was considerably higher than that of [18 F]FCWAY (IC50 : 1.5 nM vs. 2.2 nM). CONCLUSION [18 F]Mefway exhibits favorable characteristics compared to [18 F]FCWAY in rodents, and may be a promising radioligand for use in human subjects. Synapse 68:595-603, 2014. © 2014 Wiley Periodicals, Inc.
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Affiliation(s)
- Jae Yong Choi
- Department of Nuclear Medicine, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, 135-720, Korea
| | - Byoung Soo Kim
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul, 139-706, Korea
| | - Chul Hoon Kim
- Department of Pharmacology, Brain Research Institute, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, 120-752, Korea
| | - Dong Goo Kim
- Department of Pharmacology, Brain Research Institute, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, 120-752, Korea
| | - Sang Jin Han
- Department of Nuclear Medicine, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, 135-720, Korea
| | - Kyochul Lee
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul, 139-706, Korea
| | - Kyeong Min Kim
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul, 139-706, Korea
| | - Gwangil An
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul, 139-706, Korea
| | - Tae Hyun Choi
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul, 139-706, Korea
| | - Sun Dong Yoo
- College of Pharmacy, Sungkyunkwan University, Suwon, Gyeonggi-do, 440-746, Korea
| | - Young Hoon Ryu
- Department of Nuclear Medicine, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, 135-720, Korea
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Choi JY, Shin S, Lee M, Jeon TJ, Seo Y, Kim CH, Kim DG, Yi CH, Lee K, Choi TH, Kang JH, Ryu YH. Acute physical stress induces the alteration of the serotonin 1A receptor density in the hippocampus. Synapse 2014; 68:363-8. [PMID: 24771590 DOI: 10.1002/syn.21748] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/18/2014] [Accepted: 04/21/2014] [Indexed: 01/19/2023]
Abstract
Stress affects the serotonergic system, which is associated with depression. Previous research has showed that chronic stress causes the deactivation of the limbic system. However, the influence of the acute physical stress on the serotonergic system in vivo was primarily unclear. The purpose of this research is to elucidate the effects of the acute physical stress in vivo using PET. For quantification of the 5-HT1A receptors in the brain, we measured [(18)F]Mefway uptake in the two experiment groups (control and despair rats). The despair group was subjected to the external stressful situation (i.e., forced swimming) and total duration time of immobility, refers to the despair severity, and was analyzed. In the intercomparison experiment, the resulting PET images of [(18)F]Mefway in the despair rat displayed a significant reduction of radioactivity in the hippocampus (HP) compared with the control. The nondisplaceable binding potential (BPND ) refers to the ratio of the concentration of radioligand in the receptor-rich region (i.e., HP) to the concentration of that in the receptor-free region (i.e., cerebellum). The hippocampal uptake and the BPND in the despair group were respectively about 25 and 18% lower than those of the control group. The ratio of specific binding to nonspecific binding in the despair group was 18% lower than that of the control. In the intracomparison experiments, the BPND and immobility in the despair group showed a strong negative correlation. Taken together, the data illustrates that an acute physical stress induces the change in the serotonergic system that correlates with the behavioral despair.
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Affiliation(s)
- Jae Yong Choi
- Department of Nuclear Medicine, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Korea
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Choi JY, Kim CH, Ryu YH, Seo YB, Truong P, Kim EJ, Choi TH, Kang J, Lee M, Kim DG, Lee JD, Jeon TJ. Optimization of the radiosynthesis of [18F]MEFWAY for imaging brain serotonin 1A receptors by using the GE TracerLab FXFN-Promodule. J Labelled Comp Radiopharm 2013; 56:589-94. [DOI: 10.1002/jlcr.3067] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 04/12/2013] [Accepted: 05/06/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Jae Yong Choi
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul 135-720 Korea
| | - Chul Hoon Kim
- Department of Pharmacology; Brain Research Institute, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine; Seoul 120-752 Korea
| | - Young Hoon Ryu
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul 135-720 Korea
| | - Young Beom Seo
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul 135-720 Korea
| | - Phong Truong
- Global Radiopharmacy Molecular Imaging Technologies; GE Healthcare; Husbyborg 15024 Uppsala Sweden
| | - Eun Jung Kim
- Department of Molecular Imaging; Korea Institute of Radiological & Medical Sciences; Seoul 139-706 Korea
| | - Tae Hyun Choi
- Department of Molecular Imaging; Korea Institute of Radiological & Medical Sciences; Seoul 139-706 Korea
| | - JeeHae Kang
- Swarthmore College; 500 College Avenue Swarthmore; PA 19081 USA
| | - Minkyung Lee
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul 135-720 Korea
| | - Dong Goo Kim
- Department of Pharmacology; Brain Research Institute, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine; Seoul 120-752 Korea
| | - Jong Doo Lee
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul 135-720 Korea
| | - Tae Joo Jeon
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul 135-720 Korea
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Saigal N, Bajwa AK, Faheem SS, Coleman RA, Pandey SK, Constantinescu CC, Fong V, Mukherjee J. Evaluation of serotonin 5-HT(1A) receptors in rodent models using [¹⁸F]mefway PET. Synapse 2013; 67:596-608. [PMID: 23504990 DOI: 10.1002/syn.21665] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 03/09/2013] [Indexed: 11/10/2022]
Abstract
INTRODUCTION Serotonin 5-HT(1A) receptors have been investigated in various CNS disorders, including epilepsy, mood disorders, and neurodegeneration. [¹⁸F]Mefway (N-{2-[4-(2'-methoxyphenyl)piperazinyl]ethyl}-N-(2-pyridyl)-N-(cis/trans-4'-[¹⁸F]fluoromethylcyclohexane)-carboxamide) has been developed as a suitable positron emission tomography (PET) imaging agent for these receptors. We have now evaluated the suitability of [¹⁸F]trans-mefway in rat and mouse models using PET and computerized tomography (CT) imaging and corroborated with ex vivo and in vitro autoradiographic studies. METHODS Normal Sprague-Dawley rats and Balb/C mice were used for PET/CT imaging using intravenously injected [¹⁸F]trans-mefway. Brain PET data were coregistered with rat and mouse magnetic resonance imaging template and regional distribution of radioactivity was quantitated. Selected animals were used for ex vivo autoradiographic studies to confirm regional brain distribution and quantitative measures of binding, using brain region to cerebellum ratios. Binding affinity of trans-mefway and WAY-100635 was measured in rat brain homogenates. Distribution of [¹⁸F]trans-4-fluoromethylcyclohexane carboxylate ([¹⁸F]FMCHA), a major metabolite of [¹⁸F] trans-mefway, was assessed in the rat by PET/CT. RESULTS The inhibition constant, K(i) for trans-mefway was 0.84 nM and that for WAY-100635 was 1.07 nM. Rapid brain uptake of [¹⁸F]trans-mefway was observed in all rat brain regions and clearance from cerebellum was fast and was used as a reference region in all studies. Distribution of [¹⁸F]trans-mefway in various brain regions was consistent in PET and in vitro studies. The dorsal raphe was visualized and quantified in the rat PET but identification in the mouse was difficult. The rank order of binding to the various brain regions was hippocampus > frontal cortex > anterior cingulate cortex > lateral septal nuclei > dorsal raphe nuclei. CONCLUSION [¹⁸F]trans-Mefway appears to be an effective 5-HT(1A) receptor imaging agent in rodents for studies of various disease models.
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Affiliation(s)
- Neil Saigal
- Preclinical Imaging, Department of Radiological Sciences, University of California, Irvine, California, USA
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