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Gottlieb N, Li TY, Young AH, Stokes PRA. The 5-HT7 receptor system as a treatment target for mood and anxiety disorders: A systematic review. J Psychopharmacol 2023; 37:1167-1181. [PMID: 37994803 PMCID: PMC10714716 DOI: 10.1177/02698811231211228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
BACKGROUND Preclinical animal and preliminary human studies indicate that 5-HT7 antagonists have the potential as a new treatment approach for mood and anxiety disorders. In this systematic review, we aimed to review the relationship between the 5-HT7 receptor system and mood and anxiety disorders, and to explore the pharmacology and therapeutic potential of medications that target the 5-HT7 receptor for their treatment. METHODS Medline, Cochrane Library, EMBASE, PsycINFO databases, the National Institute of Health website Clinicaltrials.gov, controlled-trials.com, and relevant grey literature were used to search for original research articles, and reference lists of included articles were then hand searched. RESULTS Sixty-four studies were included in the review: 52 animal studies and 12 human studies. Studies used a variety of preclinical paradigms and questionnaires to assess change in mood, and few studies examined sleep or cognition. Forty-four out of 47 (44/47) preclinical 5-HT7 modulation studies identified potential antidepressant effects and 20/23 studies identified potential anxiolytic effects. In clinical studies, 5/7 identified potential antidepressant effects in major depressive disorder, 1/2 identified potential anxiolytic effects in generalized anxiety disorder, and 3/3 identified potential antidepressant effects in bipolar disorders. CONCLUSION While there is some evidence that the 5-HT7 receptor system may be a potential target for treating mood and anxiety disorders, many agents included in the review also bind to other receptors. Further research is needed using drugs that bind specifically to 5-HT7 receptors to examine treatment proof of concept further.
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Affiliation(s)
- Natalie Gottlieb
- Natalie Gottlieb, Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, De Crespigny Park, Denmark Hill, London SE5 8AF, UK.
| | | | - Allan H Young
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Paul RA Stokes
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
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Oh DR, Choi C, Kim MJ, Mun BY, Ko H, Oh KN, Jo A, Kim JY, Bae D. Antidepressant effects of p-coumaric acid isolated from Vaccinium bracteatum leaves extract on chronic restraint stress mouse model and antagonism of serotonin 6 receptor in vitro. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 116:154871. [PMID: 37270968 DOI: 10.1016/j.phymed.2023.154871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/02/2023] [Accepted: 05/09/2023] [Indexed: 06/06/2023]
Abstract
BACKGROUND Vaccinium bracteatum Thunb. leaves (VBL) are used in traditional herbal medicines to treat various biological diseases. p-coumaric acid (CA), the main active component of VBL, has neuroprotective effects against corticosterone-induced damage in vitro. However, the effects of CA on immobility induced by chronic restraint stress (CRS) in a mouse model and 5-HT receptor activity have not been investigated. HYPOTHESIS/PURPOSE We investigated the antagonistic effects of VBL, NET-D1602, and the three components of Gαs protein-coupled 5-HT receptors. Additionally, we identified the effects and mechanism of action of CA, the active component of NET-D1602, in the CRS-exposed model. METHODS For in vitro analyses, we used 1321N1 cells stably expressing human 5-HT6 receptors and CHO-K1 expressing human 5-HT4 or 5-HT7 receptors cell lines to study the mechanism of action. For in vivo analyses, CRS-exposed mice were orally administered CA (10, 50, or 100 mg/kg) daily for 21 consecutive days. The effects of CA were analyzed by assessing behavioral changes using a forced swim test (FST), measuring levels of hypothalamic-pituitary-adrenal (HPA) axis-related hormones in ntial therapeutic effects as 5-HT6 receptor antagonists for neurodegenerative diseases and depressioserum, and acetylcholinesterase (AChE), monoamines, including 5-HT, dopamine, and norepinephrine, using enzyme-linked immunosorbent assay kits. The underlying molecular mechanisms of the serotonin transporter (SERT), monoamine oxidase A (MAO-A), and extracellular signal-regulated kinase (ERK)/protein kinase B (Akt)/mTORC1 signaling were detected using western blotting. RESULTS CA was confirmed to be an active component in the antagonistic effects of NET-D1602 on 5-HT6 receptor activity through decreases in cAMP and ERK1/2 phosphorylation. Moreover, CRS-exposed mice treated with CA showed a significantly reduced immobility time in the FST. CA also significantly decreased corticosterone, corticotropin-releasing hormone (CRH), and adrenocorticotropic hormone (ACTH) levels. CA enhanced 5-HT, dopamine, and norepinephrine levels in the hippocampus (HC) and prefrontal cortex (PFC) but decreased MAO-A and SERT protein levels. Similarly, CA significantly upregulated the ERK, Ca2+/calmodulin-dependent protein kinase II (CaMKII), Akt/mTOR/p70S6K/S6 signaling pathways in both HC and the PFC. CONCLUSION CA contained in NET-D1602 may play the antidepressant effects against CRS-induced depression-like mechanism and the selective antagonist effect of 5-HT6 receptor.
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Affiliation(s)
- Dool-Ri Oh
- Jeonnam Bioindustry Foundation, Jeonnam Institute of Natural Resources Research (JINR), 288, Woodland-gil, Anyang-myeon, Jangheung-gun, Jeollanamdo 59338, Republic of Korea
| | - Chulyung Choi
- Department of Biomedical Science, College of Natural Science, Chosun University, 309, pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea; Department of Integrative Biological Sciences & BK21 FOUR Educational Research Group for Age-associated Disorder Control Technology, Chosun University, 309, pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
| | - Moon Jong Kim
- Jeonnam Bioindustry Foundation, Jeonnam Institute of Natural Resources Research (JINR), 288, Woodland-gil, Anyang-myeon, Jangheung-gun, Jeollanamdo 59338, Republic of Korea
| | - Bo Yeong Mun
- Jeonnam Bioindustry Foundation, Jeonnam Institute of Natural Resources Research (JINR), 288, Woodland-gil, Anyang-myeon, Jangheung-gun, Jeollanamdo 59338, Republic of Korea
| | - Haeju Ko
- Jeonnam Bioindustry Foundation, Jeonnam Institute of Natural Resources Research (JINR), 288, Woodland-gil, Anyang-myeon, Jangheung-gun, Jeollanamdo 59338, Republic of Korea
| | - Kyo-Nyeo Oh
- Jeonnam Bioindustry Foundation, Jeonnam Institute of Natural Resources Research (JINR), 288, Woodland-gil, Anyang-myeon, Jangheung-gun, Jeollanamdo 59338, Republic of Korea
| | - Ara Jo
- Department of Biomedical Science, College of Natural Science, Chosun University, 309, pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
| | - Jin Young Kim
- Department of Biomedical Science, College of Natural Science, Chosun University, 309, pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
| | - Donghyuck Bae
- Jeonnam Bioindustry Foundation, Jeonnam Institute of Natural Resources Research (JINR), 288, Woodland-gil, Anyang-myeon, Jangheung-gun, Jeollanamdo 59338, Republic of Korea.
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Grychowska K, Pietruś W, Kulawik L, Bento O, Satała G, Bantreil X, Lamaty F, Bojarski AJ, Gołębiowska J, Nikiforuk A, Marin P, Chaumont-Dubel S, Kurczab R, Zajdel P. Impact of the Substitution Pattern at the Basic Center and Geometry of the Amine Fragment on 5-HT 6 and D 3R Affinity in the 1 H-Pyrrolo[3,2- c]quinoline Series. Molecules 2023; 28:molecules28031096. [PMID: 36770761 PMCID: PMC9920808 DOI: 10.3390/molecules28031096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 01/24/2023] Open
Abstract
Salt bridge (SB, double-charge-assisted hydrogen bonds) formation is one of the strongest molecular non-covalent interactions in biological systems, including ligand-receptor complexes. In the case of G-protein-coupled receptors, such an interaction is formed by the conserved aspartic acid (D3.32) residue and the basic moiety of the aminergic ligand. This study aims to determine the influence of the substitution pattern at the basic nitrogen atom and the geometry of the amine moiety at position 4 of 1H-pyrrolo[3,2-c]quinoline on the quality of the salt bridge formed in the 5-HT6 receptor and D3 receptor. To reach this goal, we synthetized and biologically evaluated a new series of 1H-pyrrolo[3,2-c]quinoline derivatives modified with various amines. The selected compounds displayed a significantly higher 5-HT6R affinity and more potent 5-HT6R antagonist properties when compared with the previously identified compound PZ-1643, a dual-acting 5-HT6R/D3R antagonist; nevertheless, the proposed modifications did not improve the activity at D3R. As demonstrated by the in silico experiments, including molecular dynamics simulations, the applied structural modifications were highly beneficial for the formation and quality of the SB formation at the 5-HT6R binding site; however, they are unfavorable for such interactions at D3R.
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Affiliation(s)
- Katarzyna Grychowska
- Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Str., 30-688 Kraków, Poland
- Correspondence:
| | - Wojciech Pietruś
- Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Str., 31-324 Kraków, Poland
| | - Ludmiła Kulawik
- Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Str., 30-688 Kraków, Poland
| | - Ophélie Bento
- Institut de Génomique Fonctionelle, Université de Montpellier, CNRS INSERM, 34094 Montpellier, France
| | - Grzegorz Satała
- Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Str., 31-324 Kraków, Poland
| | - Xavier Bantreil
- IBMM, Université de Montpellier, CNRS, ENSCM, 34094 Montpellier, France
- Institut Universitaire de France (IUF), 75005 Paris, France
| | - Frédéric Lamaty
- IBMM, Université de Montpellier, CNRS, ENSCM, 34094 Montpellier, France
| | - Andrzej J. Bojarski
- Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Str., 31-324 Kraków, Poland
| | - Joanna Gołębiowska
- Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Str., 31-324 Kraków, Poland
| | - Agnieszka Nikiforuk
- Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Str., 31-324 Kraków, Poland
| | - Philippe Marin
- Institut de Génomique Fonctionelle, Université de Montpellier, CNRS INSERM, 34094 Montpellier, France
| | - Séverine Chaumont-Dubel
- Institut de Génomique Fonctionelle, Université de Montpellier, CNRS INSERM, 34094 Montpellier, France
| | - Rafał Kurczab
- Maj Institute of Pharmacology, Polish Academy of Sciences, 12 Smętna Str., 31-324 Kraków, Poland
| | - Paweł Zajdel
- Faculty of Pharmacy, Jagiellonian University Medical College, 9 Medyczna Str., 30-688 Kraków, Poland
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Maltsev DV, Spasov AA, Miroshnikov MV, Skripka MO. Current Approaches to the Search of Anxiolytic Drugs. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1068162021030122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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El-Mallakh RS, Nuss S, Gao D, Gao Y, Ahmad SC, Schrodt C, Adler C. Asenapine in the Treatment of Bipolar Depression. PSYCHOPHARMACOLOGY BULLETIN 2020; 50:8-18. [PMID: 32214517 PMCID: PMC7093720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
OBJECTIVES Asenapine, a potent serotonin 7 (5-HT7) receptor antagonist, was examined for efficacy as an antidepressant in depressed bipolar subjects. It was predicted that subjects with the genetic variant of the short form of the serotonin transporter (5HTTR) would be more likely to respond. EXPERIMENTAL DESIGN A subset of patients participating in a randomized, placebo-controlled study of the efficacy of asenapine in bipolar I depression also underwent genetic testing for the 5HTTR. Montgomery Åsberg Depression Rating Scale (MADRS) score was ≥ 26 prior to randomization to asenapine or placebo for 8 weeks. Gene testing was performed before breaking the blind. PRINCIPAL OBSERVATIONS Nine patients completing the study also underwent gene testing. At study end, the average MADRS improvement was -19.80 ± SD 8.59 for the 4 people randomized to asenapine and -3.80 ± 9.01 for the 5 people receiving placebo (P = 0.021, t = 2.88). Anxiety, as measured by the Hamilton Anxiety Rating Scale (HAM-A), also improved in asenapine-treated patients (-15.40 ± 6.15 vs. -2.80 ± 7.95, P = 0.023, t = 2.803). Six participants had the short form of the 5HTTR, and it is believed they influenced the significant outcome in this small sample. CONCLUSIONS While this is a very small sample, asenapine appears to have a beneficial effect on both depression and anxiety in depressed bipolar I patients compared to treatment with placebo. Due to the large fraction of subjects with the short form, the hypothesis that the SF-5HTTR might increase asenapine response could not be adequately tested.
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Affiliation(s)
- Rif S El-Mallakh
- El-Mallakh, MD, Nuss, MS, D. Gao, MD, Y. Gao MD, Surriya Ahmad, MD, Schrodt, BS, Mood Disorders Research Program, Department of Psychiatry and Behavioral Sciences, University of Louisville School of Medicine, Louisville, Kentucky. D. Gao, MD, Post Doctoral Fellow at University of Louisville, Current Address: College of Integrative Medicine Fujian University of Traditional Chinese Medicine Fuzhou, Fujian, China. Adler, MD, Department of Psychiatry University of Cincinnati Cincinnati, Ohio
| | - Sharon Nuss
- El-Mallakh, MD, Nuss, MS, D. Gao, MD, Y. Gao MD, Surriya Ahmad, MD, Schrodt, BS, Mood Disorders Research Program, Department of Psychiatry and Behavioral Sciences, University of Louisville School of Medicine, Louisville, Kentucky. D. Gao, MD, Post Doctoral Fellow at University of Louisville, Current Address: College of Integrative Medicine Fujian University of Traditional Chinese Medicine Fuzhou, Fujian, China. Adler, MD, Department of Psychiatry University of Cincinnati Cincinnati, Ohio
| | - Dong Gao
- El-Mallakh, MD, Nuss, MS, D. Gao, MD, Y. Gao MD, Surriya Ahmad, MD, Schrodt, BS, Mood Disorders Research Program, Department of Psychiatry and Behavioral Sciences, University of Louisville School of Medicine, Louisville, Kentucky. D. Gao, MD, Post Doctoral Fellow at University of Louisville, Current Address: College of Integrative Medicine Fujian University of Traditional Chinese Medicine Fuzhou, Fujian, China. Adler, MD, Department of Psychiatry University of Cincinnati Cincinnati, Ohio
| | - Yonglin Gao
- El-Mallakh, MD, Nuss, MS, D. Gao, MD, Y. Gao MD, Surriya Ahmad, MD, Schrodt, BS, Mood Disorders Research Program, Department of Psychiatry and Behavioral Sciences, University of Louisville School of Medicine, Louisville, Kentucky. D. Gao, MD, Post Doctoral Fellow at University of Louisville, Current Address: College of Integrative Medicine Fujian University of Traditional Chinese Medicine Fuzhou, Fujian, China. Adler, MD, Department of Psychiatry University of Cincinnati Cincinnati, Ohio
| | - Surriya Colleen Ahmad
- El-Mallakh, MD, Nuss, MS, D. Gao, MD, Y. Gao MD, Surriya Ahmad, MD, Schrodt, BS, Mood Disorders Research Program, Department of Psychiatry and Behavioral Sciences, University of Louisville School of Medicine, Louisville, Kentucky. D. Gao, MD, Post Doctoral Fellow at University of Louisville, Current Address: College of Integrative Medicine Fujian University of Traditional Chinese Medicine Fuzhou, Fujian, China. Adler, MD, Department of Psychiatry University of Cincinnati Cincinnati, Ohio
| | - Clare Schrodt
- El-Mallakh, MD, Nuss, MS, D. Gao, MD, Y. Gao MD, Surriya Ahmad, MD, Schrodt, BS, Mood Disorders Research Program, Department of Psychiatry and Behavioral Sciences, University of Louisville School of Medicine, Louisville, Kentucky. D. Gao, MD, Post Doctoral Fellow at University of Louisville, Current Address: College of Integrative Medicine Fujian University of Traditional Chinese Medicine Fuzhou, Fujian, China. Adler, MD, Department of Psychiatry University of Cincinnati Cincinnati, Ohio
| | - Caleb Adler
- El-Mallakh, MD, Nuss, MS, D. Gao, MD, Y. Gao MD, Surriya Ahmad, MD, Schrodt, BS, Mood Disorders Research Program, Department of Psychiatry and Behavioral Sciences, University of Louisville School of Medicine, Louisville, Kentucky. D. Gao, MD, Post Doctoral Fellow at University of Louisville, Current Address: College of Integrative Medicine Fujian University of Traditional Chinese Medicine Fuzhou, Fujian, China. Adler, MD, Department of Psychiatry University of Cincinnati Cincinnati, Ohio
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Zhang YX, Yang M, Liang F, Li SQ, Yang JS, Huo FQ, Yan CX. The pronociceptive role of 5-HT 6 receptors in ventrolateral orbital cortex in a rat formalin test model. Neurochem Int 2019; 131:104562. [PMID: 31580911 DOI: 10.1016/j.neuint.2019.104562] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/16/2019] [Accepted: 09/30/2019] [Indexed: 01/23/2023]
Abstract
Recent studies have shown the 5-HT6 receptors are expressed in regions which are important in pain processing such as the cortex, amygdala, thalamus, PAG, spinal cord and dorsal root ganglia (DRG), suggesting a putative role of 5-HT6 receptors in pain modulation. The ventrolateral orbital cortex (VLO) is part of an endogenous analgesic system, consisting of the spinal cord - thalamic nucleus submedius (Sm) - VLO - periaqueductal gray (PAG) - spinal cord loop. The present study assessed the possible role of 5-HT6 receptors in the VLO in formalin-induced inflammatory pain model. Firstly we found that microinjection of selective 5-HT6 receptor agonists EMD-386088 (5 μg in 0.5 μl) and WAY-208466 (8 μg in 0.5 μl) both augmented 5% formalin-induced nociceptive behavior. Microinjection of selective 5-HT6 receptor antagonist SB-258585 (1,2 and 4 μg in 0.5 μl) significantly reduced formalin-induced flinching. Besides, the pronociceptive effects of EMD-386088 and WAY-208466 were dramatically reduced by SB-258585, implicating 5-HT6 receptor mechanisms in mediating these responses. In addition, the pronociceptive effect of EMD-386088 was also prevented by the adenylate cyclase (AC) inhibitor SQ-22536 (2 nmol in 0.5 μl) and the protein kinase A (PKA) inhibitor H89 (10 nmol in 0.5 μl), respectively. We further confirmed the above results with quantification of spinal c-fos expression. Taken together, our results suggested that 5-HT6 receptors play a pronociceptive role in the VLO in the rat formalin test due to its activation of AC - PKA pathway. Therefore, cerebral cortical 5-HT6 receptors could be a new target to develop analgesic drugs.
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Affiliation(s)
- Yu-Xiang Zhang
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; The Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, China
| | - Mei Yang
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; The Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, China
| | - Feng Liang
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; The Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, China
| | - Shao-Qing Li
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; The Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, China
| | - Jing-Si Yang
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; The Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, China
| | - Fu-Quan Huo
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China.
| | - Chun-Xia Yan
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, 710061, China; The Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, China.
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Grychowska K, Chaumont-Dubel S, Kurczab R, Koczurkiewicz P, Deville C, Krawczyk M, Pietruś W, Satała G, Buda S, Piska K, Drop M, Bantreil X, Lamaty F, Pękala E, Bojarski AJ, Popik P, Marin P, Zajdel P. Dual 5-HT 6 and D 3 Receptor Antagonists in a Group of 1 H-Pyrrolo[3,2- c]quinolines with Neuroprotective and Procognitive Activity. ACS Chem Neurosci 2019; 10:3183-3196. [PMID: 30896921 DOI: 10.1021/acschemneuro.8b00618] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
In light of the multifactorial origin of neurodegenerative disorders and some body of evidence indicating that pharmacological blockade of serotonin 5-HT6 and dopamine D3 receptors might be beneficial for cognitive decline, we envisioned (S)-1-[(3-chlorophenyl)sulfonyl]-4-(pyrrolidine-3-yl-amino)-1H-pyrrolo[3,2-c]quinoline (CPPQ), a neutral antagonist of 5-HT6R, as a chemical template for designing dual antagonists of 5-HT6/D3 receptors. As shown by in vitro experiments, supported by quantum chemical calculations and molecular dynamic simulations, introducing alkyl substituents at the pyrrolidine nitrogen of CPPQ, fulfilled structural requirements for simultaneous modulation of 5-HT6 and D3 receptors. The study identified compound 19 ((S)-1-((3-chlorophenyl)sulfonyl)-N-(1-isobutylpyrrolidin-3-yl)-1H-pyrrolo[3,2-c]quinolin-4-amine), which was classified as a dual 5-HT6/D3R antagonist (Ki(5-HT6) = 27 nM, Ki(D3) = 7 nM). Compound 19 behaved as a neutral antagonist at Gs signaling and had no influence on receptor-operated, cyclin-dependent kinase 5 (Cdk5)-dependent neurite growth. In contrast to the well characterized 5-HT6R antagonist intepirdine, compound 19 displayed neuroprotective properties against astrocyte damage induced by doxorubicin, as shown using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium (MTT) staining to assess cell metabolic activity and lactate dehydrogenase (LDH) release as an index of cell membrane disruption. This feature is of particular importance considering the involvement of loss of homeostatic function of glial cells in the progress of neurodegeneration. Biological results obtained for 19 in in vitro tests, translated into procognitive properties in phencyclidine (PCP)-induced memory decline in the novel object recognition (NOR) task in rats.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Szymon Buda
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387 Kraków, Poland
| | | | | | - Xavier Bantreil
- IBMM, UMR 5247, CNRS, Université de Montpellier, ENSCM, Place Eugène Bataillon, 34095 Montpellier, France
| | - Frédéric Lamaty
- IBMM, UMR 5247, CNRS, Université de Montpellier, ENSCM, Place Eugène Bataillon, 34095 Montpellier, France
| | | | | | | | - Philippe Marin
- IGF, Université de Montpellier, CNRS INSERM, 34094 Montpellier, France
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