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García-Pedraza JÁ, Fernández-González JF, López C, Martín ML, Alarcón-Torrecillas C, Rodríguez-Barbero A, Morán A, García-Domingo M. Oral fluoxetine treatment changes serotonergic sympatho-regulation in experimental type 1 diabetes. Life Sci 2022; 293:120335. [PMID: 35051421 DOI: 10.1016/j.lfs.2022.120335] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/14/2022] [Accepted: 01/14/2022] [Indexed: 11/28/2022]
Abstract
AIMS This study investigated whether fluoxetine treatment changes the 5-HT regulation on vascular sympathetic neurotransmission in type 1 diabetes. MAIN METHODS Four-week diabetes was obtained by a single alloxan s.c. administration in male Wistar rats, administering fluoxetine for 14 days (10 mg/kg/day; p.o.). Systolic blood pressure, heart rate, glycaemia, body weight (BW) evolution, creatinine, and blood urea nitrogen (BUN) were monitored. Afterward, rats were pithed to perform the vascular sympathetic stimulation. 5-HT1A/1D/2A receptors expression was analysed by Western blot in thoracic aorta. Both i.v. norepinephrine and the electrical stimulation of the spinal sympathetic drive evoked vasoconstrictor responses. KEY FINDINGS Fluoxetine treatment significantly reduced the BW gain, hyperglycaemia, creatinine, and BUN in diabetic rats. The electrical-produced vasopressor responses were greater in untreated than in fluoxetine-treated diabetic rats. 5-HT decreased the sympathetic-produced vasopressor responses. While 5-CT, 8-OH-DPAT and L-694,247 (5-HT1/7, 5-HT1A and 5-HT1D agonists, respectively) reproduced 5-HT-evoked inhibition, the 5-HT2 activation by α-methyl-5-HT augmented the vasoconstrictions. The 5-CT sympatho-inhibition was reversed by 5-HT1A plus 5-HT1D antagonists (WAY-100,635 and LY310762, respectively), whereas ritanserin (5-HT2A antagonist) blocked the α-methyl-5-HT potentiating effect. Norepinephrine-generated vasoconstrictions were increased or diminished by α-methyl-5-HT or 5-CT, respectively. 5-HT1A/1D/2A receptors were expressed at vascular level, being 5-HT1A expression increased by fluoxetine in diabetic rats. SIGNIFICANCE Our findings suggest that fluoxetine improves metabolic and renal profiles, changes the vasopressor responses, and 5-HT receptors modulating sympathetic activity in diabetic rats: 5-HT1A/1D are involved in the sympatho-inhibition, while 5-HT2A is implicated in the sympatho-potentiation, being both effects pre and/or postjunctional in nature.
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Affiliation(s)
- José Ángel García-Pedraza
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007 Salamanca, Spain
| | - Juan Francisco Fernández-González
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007 Salamanca, Spain
| | - Cristina López
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain
| | - María Luisa Martín
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007 Salamanca, Spain
| | - Claudia Alarcón-Torrecillas
- Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007 Salamanca, Spain; Unit of Cardiovascular and Renal Pathophysiology, Research Institute of Nephrology "Reina Sofía", Department of Physiology and Pharmacology, University of Salamanca, 37007 Salamanca, Spain
| | - Alicia Rodríguez-Barbero
- Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007 Salamanca, Spain; Unit of Cardiovascular and Renal Pathophysiology, Research Institute of Nephrology "Reina Sofía", Department of Physiology and Pharmacology, University of Salamanca, 37007 Salamanca, Spain
| | - Asunción Morán
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007 Salamanca, Spain
| | - Mónica García-Domingo
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007 Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007 Salamanca, Spain.
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Li YX, Li JH, Guo Y, Tao ZY, Qin SH, Traub RJ, An H, Cao DY. Oxytocin inhibits hindpaw hyperalgesia induced by orofacial inflammation combined with stress. Mol Pain 2022; 18:17448069221089591. [PMID: 35266833 PMCID: PMC9047792 DOI: 10.1177/17448069221089591] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Oxytocin (OT) is recognized as a critical neuropeptide in pain-related disorders. Chronic pain caused by the comorbidity of temporomandibular disorder (TMD) and fibromyalgia syndrome (FMS) is common, but whether OT plays an analgesic role in the comorbidity of TMD and FMS is unknown. Female rats with masseter muscle inflammation combined with 3-day forced swim (FS) stress developed somatic hypersensitivity, which modeled the comorbidity of TMD and FMS. Using this model, the effects of spinal OT administration on mechanical allodynia and thermal hyperalgesia in hindpaws were examined. Furthermore, the protein levels of OT receptors and 5-HT2A receptors in the L4-L5 spinal dorsal horn were analyzed by Western blot. The OT receptor antagonist atosiban and 5-HT2A receptor antagonist ritanserin were intrathecally injected prior to OT injection in the separate groups. Intrathecal injection of 0.125 μg and 0.5 μg OT attenuated the hindpaw hyperalgesia. The expression of OT receptors and 5-HT2A receptors in the L4-L5 spinal dorsal horn significantly increased following intrathecal injection of 0.5 μg OT. Intrathecal administration of either the OT receptor antagonist atosiban or 5-HT2A receptor antagonist ritanserin blocked the analgesic effect of OT. These results suggest that OT may inhibit hindpaw hyperalgesia evoked by orofacial inflammation combined with stress through OT receptors and/or 5-HT2A receptors, thus providing a therapeutic prospect for drugs targeting the OT system and for patients with comorbidity of TMD and FMS.
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Affiliation(s)
- Yue-Xin Li
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
- Department of Special Dental Care, Xi’an Jiaotong University College of
Stomatology, China
| | - Jia-Heng Li
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
| | - Yi Guo
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
| | - Zhuo-Ying Tao
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
| | - Shi-Hao Qin
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
- Department of Special Dental Care, Xi’an Jiaotong University College of
Stomatology, China
| | - Richard J Traub
- Department of Neural and Pain
Sciences, School of Dentistry, Center to Advance Chronic Pain Research, University of Maryland
Baltimore, Baltimore, MD, USA
| | - Hong An
- Department of Special Dental Care, Xi’an Jiaotong University College of
Stomatology, China
| | - Dong-Yuan Cao
- Key Laboratory of Shaanxi Province
for Craniofacial Precision Medicine Research, Research Center of Stomatology, Xi’an Jiaotong University College of
Stomatology, China
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García-Pedraza JÁ, López C, Fernández-González JF, Martín ML, Morán A, García-Domingo M. Vascular sympathetic neurotransmission and its serotonergic regulation are modified by chronic fluoxetine treatment. J Pharmacol Sci 2021; 147:48-57. [PMID: 34294372 DOI: 10.1016/j.jphs.2021.05.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/07/2021] [Accepted: 05/17/2021] [Indexed: 11/23/2022] Open
Abstract
Given the interconnection between depressive and cardiovascular disorders, we investigated whether antidepressant treatment (fluoxetine) modifies the serotonergic influence on rat vascular noradrenergic outflow. Twelve-week-old male Wistar rats received fluoxetine treatment (10 mg/kg/day; p.o.) for 14 days; then, they were pithed and prepared for sympathetic stimulation. Vasopressor responses were obtained by electrical stimulation of the sympathetic outflow (0.1, 0.5, 1, and 5 Hz) or i.v. noradrenaline (NA; 0.01, 0.05, 0.1, and 0.5 μg/kg). In fluoxetine-treated group, the electrical-induced vasoconstrictions were lower compared to non-treated rats. Intravenous infusion of 5-HT (10 μg/kg/min) inhibited the sympathetically-induced vasoconstrictions. Only 5-CT, 8-OH-DPAT and L-694,247 (5-HT1/7, 5-HT1A and 5-HT1D agonists, respectively) mimicked 5-HT-induced inhibition, while α-methyl-5-HT (5-HT2 agonist) increased the vasopressor responses. The inhibitory effect of 5-HT was: a) no modified by SB269970 (5-HT7 antagonist); b) abolished by WAY-100,635 (5-HT1A antagonist) plus LY310762 (5-HT1D antagonist); and c) potentiated by ritanserin (5-HT2A receptor antagonist). The vasoconstrictions induced by exogenous NA were not modified by 5-CT but were increased by α-methyl-5-HT. Our results suggest that fluoxetine treatment decreases NA release at vascular level and changes 5-HT modulation on rat vascular noradrenergic neurotransmission, inducing sympatho-inhibition via prejunctional 5-HT1A/1D receptors, and sympatho-potentiation via pre and/or postjunctional 5-HT2A receptors.
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Affiliation(s)
- José Ángel García-Pedraza
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007, Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007, Salamanca, Spain
| | - Cristina López
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007, Salamanca, Spain
| | - Juan Francisco Fernández-González
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007, Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007, Salamanca, Spain
| | - María Luisa Martín
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007, Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007, Salamanca, Spain
| | - Asunción Morán
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007, Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007, Salamanca, Spain
| | - Mónica García-Domingo
- Laboratory of Pharmacology, Department of Physiology and Pharmacology, Faculty of Pharmacy, University of Salamanca, 37007, Salamanca, Spain; Research Institute of Salamanca (IBSAL), Paseo San Vicente 58-182, 37007, Salamanca, Spain.
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Shin EJ, Jeong JH, Nguyen BT, Sharma N, Nah SY, Chung YH, Lee Y, Byun JK, Nabeshima T, Ko SK, Kim HC. Ginsenoside Re Protects against Serotonergic Behaviors Evoked by 2,5-Dimethoxy-4-iodo-amphetamine in Mice via Inhibition of PKCδ-Mediated Mitochondrial Dysfunction. Int J Mol Sci 2021; 22:ijms22137219. [PMID: 34281274 PMCID: PMC8268959 DOI: 10.3390/ijms22137219] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/26/2021] [Accepted: 06/29/2021] [Indexed: 02/07/2023] Open
Abstract
It has been recognized that serotonin 2A receptor (5-HT2A) agonist 2,5-dimethoxy-4-iodo-amphetamine (DOI) impairs serotonergic homeostasis. However, the mechanism of DOI-induced serotonergic behaviors remains to be explored. Moreover, little is known about therapeutic interventions against serotonin syndrome, although evidence suggests that ginseng might possess modulating effects on the serotonin system. As ginsenoside Re (GRe) is well-known as a novel antioxidant in the nervous system, we investigated whether GRe modulates 5-HT2A receptor agonist DOI-induced serotonin impairments. We proposed that protein kinase Cδ (PKCδ) mediates serotonergic impairments. Treatment with GRe or 5-HT2A receptor antagonist MDL11939 significantly attenuated DOI-induced serotonergic behaviors (i.e., overall serotonergic syndrome behaviors, head twitch response, hyperthermia) by inhibiting mitochondrial translocation of PKCδ, reducing mitochondrial glutathione peroxidase activity, mitochondrial dysfunction, and mitochondrial oxidative stress in wild-type mice. These attenuations were in line with those observed upon PKCδ inhibition (i.e., pharmacologic inhibitor rottlerin or PKCδ knockout mice). Furthermore, GRe was not further implicated in attenuation mediated by PKCδ knockout in mice. Our results suggest that PKCδ is a therapeutic target for GRe against serotonergic behaviors induced by DOI.
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Affiliation(s)
- Eun-Joo Shin
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chunchon 24341, Korea; (E.-J.S.); (B.-T.N.); (N.S.)
| | - Ji Hoon Jeong
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, College of Medicine, Chung-Ang University, Seoul 06974, Korea;
| | - Bao-Trong Nguyen
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chunchon 24341, Korea; (E.-J.S.); (B.-T.N.); (N.S.)
| | - Naveen Sharma
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chunchon 24341, Korea; (E.-J.S.); (B.-T.N.); (N.S.)
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, College of Medicine, Chung-Ang University, Seoul 06974, Korea;
| | - Seung-Yeol Nah
- Ginsentology Research Laboratory, Department of Physiology, College of Veterinary Medicine and Bio/Molecular Informatics Center, Konkuk University, Seoul 05029, Korea;
| | - Yoon Hee Chung
- Department of Anatomy, College of Medicine, Chung-Ang University, Seoul 06974, Korea;
| | - Yi Lee
- Department of Industrial Plant Science & Technology, Chungbuk National University, Chungju 28644, Korea;
| | - Jae Kyung Byun
- Korea Society of Forest Environmental Research, Namyanju 12106, Korea;
| | - Toshitaka Nabeshima
- Advanced Diagnostic System Research Laboratory, Fujita Health University Graduate School of Health Science, Toyoake 470-1192, Japan;
| | - Sung Kwon Ko
- Department of Oriental Medical Food and Nutrition, Semyung University, Jecheon 27136, Korea
- Correspondence: (S.K.K.); (H.-C.K.); Tel.: +82-33-250-6917 (H.-C.K.); Fax: +82-33-259-5631 (H.-C.K.)
| | - Hyoung-Chun Kim
- Neuropsychopharmacology and Toxicology Program, College of Pharmacy, Kangwon National University, Chunchon 24341, Korea; (E.-J.S.); (B.-T.N.); (N.S.)
- Correspondence: (S.K.K.); (H.-C.K.); Tel.: +82-33-250-6917 (H.-C.K.); Fax: +82-33-259-5631 (H.-C.K.)
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Wang Q, Wills M, Han Z, Geng X, Ding Y. Mini Review (Part I): An Experimental Concept on Exercise and Ischemic Conditioning in Stroke Rehabilitation. Brain Circ 2021; 6:242-247. [PMID: 33506146 PMCID: PMC7821806 DOI: 10.4103/bc.bc_63_20] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/10/2020] [Accepted: 12/11/2020] [Indexed: 12/11/2022] Open
Abstract
Stroke remains a leading cause of adult death and disability. Poststroke rehabilitation is vital for reducing the long-term sequelae of brain ischemia. Recently, physical exercise training has been well established as an effective rehabilitation tool, but its efficacy depends on exercise parameters and the patient's capacities, which are often altered following a major cerebrovascular event. Thus, ischemic conditioning as a rehabilitation intervention was considered an “exercise equivalent,” but the investigation is still in its relative infancy. In this mini-review, we discuss the potential for physical exercise or ischemic conditioning and its relation to angiogenesis, neurogenesis, and plasticity in stroke rehabilitation. This allows the readers to understand the context of the research and the application of ischemic conditioning in poststroke rehabilitation.
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Affiliation(s)
- Qingzhu Wang
- China-America Institute of Neuroscience, Beijing Luhe Hospital, Capital Medical University, Beijing, China
| | - Melissa Wills
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Zhenzhen Han
- China-America Institute of Neuroscience, Beijing Luhe Hospital, Capital Medical University, Beijing, China.,Department of Neurology, Beijing Luhe Hospital, Capital Medical University, Beijing, China
| | - Xiaokun Geng
- China-America Institute of Neuroscience, Beijing Luhe Hospital, Capital Medical University, Beijing, China.,Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, USA.,Department of Neurology, Beijing Luhe Hospital, Capital Medical University, Beijing, China
| | - Yuchuan Ding
- Department of Neurology, Beijing Luhe Hospital, Capital Medical University, Beijing, China.,Department of Research and Development Center, John D. Dingell VA Medical Center, Detroit, Michigan, USA
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Phan DH, Shin EJ, Sharma N, Hoang Yen TP, Dang DK, Lee YS, Lee YJ, Nah SY, Cheong JH, Jeong JH, Kim HC. 5-HT 2A receptor-mediated PKCδ phosphorylation is critical for serotonergic impairments induced by p-chloroamphetamine in mice. Food Chem Toxicol 2020; 141:111395. [PMID: 32437895 DOI: 10.1016/j.fct.2020.111395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 04/18/2020] [Accepted: 04/29/2020] [Indexed: 02/06/2023]
Abstract
p-Chloroamphetamine (PCA), an amphetamine derivative, has been shown to induce serotonergic toxicity. However, the precise mechanism of serotonergic toxicity induced by PCA remains unclear. In this study, PCA treatment (20 mg/kg, i.p.) did not significantly change 5-HT1A receptor gene expression, but significantly increased 5-HT2A receptor gene expression. Furthermore, 5-HT2A receptor antagonist MDL11939, but not 5-HT1A receptor antagonist WAY100635, significantly attenuated PCA-induced serotonergic impairments. We investigated whether PCA activated a specific isoform of protein kinase C (PKC), since previous evidence indicated the involvement of PKC in neurotoxicity induced by amphetamines. We observed that PCA treatment significantly increased the expression levels of PKCδ among all PKC isoforms. MDL11939 treatment significantly attenuated PCA-induced phosphorylation of PKCδ. However, PCA-induced increase in 5-HT2A receptor gene expression was not altered by rottlerin (a pharmacological inhibitor of PKCδ) in mice, suggesting that 5-HT2A receptor is an upstream molecule for the activation of PKCδ. Rottlerin or PKCδ knockout significantly attenuated serotonergic behaviors. However, MDL11939 did not show any additional effects against the attenuation caused by PKCδ knockout in mice, suggesting that PKCδ gene is a molecular target for 5-HT2A receptor-mediated serotonergic effects. Our results suggest that 5-HT2A receptor mediates PCA-induced serotonergic impairments via activation of PKC.δ.
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Affiliation(s)
- Dieu Hien Phan
- Neuropsychopharmacology and Toxicology Program, BK21 PLUS Project, College of Pharmacy, Kangwon National University, Chunchon, 24341, Republic of Korea; School of Medicine and Pharmacy - Hoa Quy Ward, The University of Da Nang, Da Nang 550000, Viet Nam
| | - Eun-Joo Shin
- Neuropsychopharmacology and Toxicology Program, BK21 PLUS Project, College of Pharmacy, Kangwon National University, Chunchon, 24341, Republic of Korea
| | - Naveen Sharma
- Neuropsychopharmacology and Toxicology Program, BK21 PLUS Project, College of Pharmacy, Kangwon National University, Chunchon, 24341, Republic of Korea
| | - Tran Phi Hoang Yen
- Faculty of Pharmacy, University of Medicine and Pharmacy of Ho Chi Minh City, 710000, Viet Nam
| | - Duy-Khanh Dang
- Pharmacy Faculty, Can Tho University of Medicine and Pharmacy, Can Tho City, 900000, Viet Nam
| | - Yong Sup Lee
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Yu Jeung Lee
- Clinical Pharmacy, College of Pharmacy, Kangwon National University, Chunchon, 24341, Republic of Korea
| | - Seung-Yeol Nah
- Ginsentology Research Laboratory and Department of Physiology, College of Veterinary Medicine and Bio/Molecular Informatics Center, Konkuk University, Seoul, 05029, Republic of Korea
| | - Jae Hoon Cheong
- Department of Pharmacy, Sahmyook University, Seoul, 01795, Republic of Korea
| | - Ji Hoon Jeong
- Department of Pharmacology, College of Medicine, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Hyoung-Chun Kim
- Neuropsychopharmacology and Toxicology Program, BK21 PLUS Project, College of Pharmacy, Kangwon National University, Chunchon, 24341, Republic of Korea.
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