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Feng Y, Shen J. Machine learning-based predictive models and drug prediction for schizophrenia in multiple programmed cell death patterns. Front Mol Neurosci 2023; 16:1123708. [PMID: 36993785 PMCID: PMC10042291 DOI: 10.3389/fnmol.2023.1123708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/22/2023] [Indexed: 03/14/2023] Open
Abstract
BackgroundSchizophrenia (SC) is one of the most common mental illnesses. However, the underlying genes that cause it and its effective treatments are unknown. Programmed cell death (PCD) is associated with many immune diseases and plays an important role in schizophrenia, which may be a diagnostic indicator of the disease.MethodsTwo groups as training and validation groups were chosen for schizophrenia datasets from the Gene Expression Omnibus Database (GEO). Furthermore, the PCD-related genes of the 12 patterns were extracted from databases such as KEGG. Limma analysis was performed for differentially expressed genes (DEG) identification and functional enrichment analysis. Machine learning was employed to identify minimum absolute contractions and select operator (LASSO) regression to determine candidate immune-related center genes, construct protein–protein interaction networks (PPI), establish artificial neural networks (ANN), and validate with consensus clustering (CC) analysis, then Receiver operating characteristic curve (ROC curve) was drawn for diagnosis of schizophrenia. Immune cell infiltration was developed to investigate immune cell dysregulation in schizophrenia, and finally, related drugs with candidate genes were collected via the Network analyst online platform.ResultsIn schizophrenia, 263 genes were crossed between DEG and PCD-related genes, and machine learning was used to select 42 candidate genes. Ten genes with the most significant differences were selected to establish a diagnostic prediction model by differential expression profiling. It was validated using artificial neural networks (ANN) and consensus clustering (CC), while ROC curves were plotted to assess diagnostic value. According to the findings, the predictive model had a high diagnostic value. Immune infiltration analysis revealed significant differences in Cytotoxic and NK cells in schizophrenia patients. Six candidate gene-related drugs were collected from the Network analyst online platform.ConclusionOur study systematically discovered 10 candidate hub genes (DPF2, ATG7, GSK3A, TFDP2, ACVR1, CX3CR1, AP4M1, DEPDC5, NR4A2, and IKBKB). A good diagnostic prediction model was obtained through comprehensive analysis in the training (AUC 0.91, CI 0.95–0.86) and validation group (AUC 0.94, CI 1.00–0.85). Furthermore, drugs that may be useful in the treatment of schizophrenia have been obtained (Valproic Acid, Epigallocatechin gallate).
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Affiliation(s)
- Yu Feng
- The University of New South Wales, Kensington, NSW, Australia
- The University of Melbourne, Parkville, VIC, Australia
| | - Jing Shen
- The Affiliated Jiangsu Shengze Hospital of Nanjing Medical University, Nanjing, China
- *Correspondence: Jing Shen,
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Batiha GES, Al-Snafi AE, Thuwaini MM, Teibo JO, Shaheen HM, Akomolafe AP, Teibo TKA, Al-Kuraishy HM, Al-Garbeeb AI, Alexiou A, Papadakis M. Morus alba: a comprehensive phytochemical and pharmacological review. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023:10.1007/s00210-023-02434-4. [PMID: 36877269 DOI: 10.1007/s00210-023-02434-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 02/16/2023] [Indexed: 03/07/2023]
Abstract
Morus alba is a fast-growing shrub or medium-sized tree with a straight, cylindrical trunk. Medicinally, whole plants, leaves, fruits, branches, and roots have been employed. Google Scholar, PubMed, Scopus, and Web of Science were used to search for relevant material on the phytochemical components and pharmacologic and mechanism of action of the Morus alba. This was reviewed to assess important updates about Morus alba. The fruits of Morus alba have traditionally been used as an analgesic, anthelmintic, antibacterial, anti-rheumatic, diuretic, hypotensive, hypoglycemia, purgative, restorative, sedative tonic, and blood stimulant. Various plant parts were used as a cooling, sedating, diuretic, tonic, and astringent agent to treat nerve disorders. The plant contained tannins, steroids, phytosterols, sitosterol, glycosides, alkaloids, carbohydrates, proteins, and amino acids, as well as saponins, triterpenes, phenolics, flavonoids, benzofuran derivatives, anthocyanins, anthraquinones, glycosides, vitamins, and minerals. Previous pharmacological research identified antimicrobial, anti-inflammatory, immunological, analgesic, antipyretic, antioxidant, anti-cancer, antidiabetic, gastrointestinal, respiratory, cardiovascular, hypolipidemic, anti-obesity, dermatological, neurological, muscular, and protecting effects. This study looked at Morus alba's traditional uses, chemical components, and pharmacological effects.
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Affiliation(s)
- Gaber El-Saber Batiha
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, El Beheira, Egypt.
| | - Ali Esmail Al-Snafi
- Department of Pharmacology, College of Medicine, University of Thi-Qar, Nasiriyah, Iraq
| | - Mahdi M Thuwaini
- College of Medical and Healthy Techniques, Southern Technique University, Basra, Iraq
| | - John Oluwafemi Teibo
- Department of Biochemistry and Immunology, Ribeirão, Preto Medical School , University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
| | - Hazem M Shaheen
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, El Beheira, Egypt
| | | | - Titilade Kehinde Ayandeyi Teibo
- Department of Maternal-Infant and Public Health Nursing, College of Nursing, University of São Paulo, Ribeirão PretoRibeirão Preto, São Paulo, Brazil
| | - Hayder M Al-Kuraishy
- Department of Clinical Pharmacologyand, Therapeutic Medicine, College of Medicine , Almustansiriyah University, Baghdad, Iraq
| | - Ali I Al-Garbeeb
- Department of Clinical Pharmacologyand, Therapeutic Medicine, College of Medicine , Almustansiriyah University, Baghdad, Iraq
| | - Athanasios Alexiou
- Department of Science and Engineering, Novel Global Community Educational Foundation, Hebersham, NSW, 2770, Australia.,AFNP Med, 1030, Vienna, Austria
| | - Marios Papadakis
- Department of Surgery II, University Hospital Witten-Herdecke, University of Witten-Herdecke, Heusnerstrasse 40, 42283, Wuppertal, Germany.
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Camargo A, Dalmagro AP, Rebelo AM, Reinke CK, Zeni ALB. Phenolic profile, antidepressant-like and neuroprotective effects of Maclura tinctoria leaves extract. Nat Prod Res 2021; 36:4692-4695. [PMID: 34747285 DOI: 10.1080/14786419.2021.2000407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Considering the drawbacks elicited by the conventional antidepressants, the interest in natural products for the management of major depressive disorder has increased in the last years. Therefore, this study investigated the phenolic profile of Maclura tinctoria leaf aqueous extract (MtAE) and its possible antidepressant-like effect in mice. The LC-MS/MS analysis demonstrated MtAE has epicatechin as the major phenolic, followed by catechin, gallic acid, quercetin, syringaldehyde, ferulic acid, and syringic acid. Moreover, the acute treatment of MtAE elicited an antidepressant-like response in mice. Importantly, this antidepressant-like effect produced by MtAE was reinforced in the chronic corticosterone (20 mg/kg p.o.) administration model. MtAE treatment was also effective to protect hippocampal and cerebrocortical slices against glutamatergic excitotoxicity. Our results indicated that MtAE displayed antidepressant-like and neuroprotective effects and these responses could be associated with the presence of the phenolic compounds identified.
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Affiliation(s)
- Anderson Camargo
- Laboratório de Avaliação de Substâncias Bioativas, Departamento de Ciências Naturais, Universidade Regional de Blumenau, Blumenau, Santa Catarina, Brazil
| | - Ana Paula Dalmagro
- Laboratório de Avaliação de Substâncias Bioativas, Departamento de Ciências Naturais, Universidade Regional de Blumenau, Blumenau, Santa Catarina, Brazil.,Programa de Pós-Graduação em Química, Departamento de Química, Universidade Regional de Blumenau, Blumenau, Santa Catarina, Brazil
| | - Andrey Martinez Rebelo
- Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - EPAGRI, Itajaí, Santa Catarina, Brazil
| | - Cássia Katrin Reinke
- Serviço Nacional de Aprendizagem Industrial - SENAI, Instituto SENAI de Tecnologia Ambiental, Blumenau, Santa Catarina, Brazil
| | - Ana Lúcia Bertarello Zeni
- Laboratório de Avaliação de Substâncias Bioativas, Departamento de Ciências Naturais, Universidade Regional de Blumenau, Blumenau, Santa Catarina, Brazil.,Programa de Pós-Graduação em Química, Departamento de Química, Universidade Regional de Blumenau, Blumenau, Santa Catarina, Brazil
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Tam DNH, Nam NH, Elhady MT, Tran L, Hassan OG, Sadik M, Tien PTM, Elshafei GA, Huy NT. Effects of Mulberry on The Central Nervous System: A Literature Review. Curr Neuropharmacol 2020; 19:193-219. [PMID: 32379591 PMCID: PMC8033976 DOI: 10.2174/1570159x18666200507081531] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/09/2022] Open
Abstract
Background Mulberry, including several species belonging to genus Morus, has been widely used as a traditional medicine for a long time. Extracts and active components of mulberry have many positive neurological and biological effects and can become potential candidates in the search for new drugs for neurological disorders. Objectives We aimed to systematically review the medical literature for evidence of mulberry effects on the central nervous system. Methods We conducted a systematic search in nine databases. We included all in vivo studies investigating the effect of mulberry on the central nervous system with no restrictions. Results We finally included 47 articles for quality synthesis. Our findings showed that mulberry and its components possessed an antioxidant effect, showed a reduction in the cerebral infarct volume after stroke. They also improved the cognitive function, learning process, and reduced memory impairment in many animal models. M. alba and its extracts ameliorated Parkinson's disease-like behaviors, limited the complications of diabetes mellitus on the central nervous system, possessed anti-convulsant, anti-depressive, and anxiolytic effects. Conclusion Mulberry species proved beneficial to many neurological functions in animal models. The active ingredients of each species, especially M. alba, should be deeper studied for screening potential candidates for future treatments.
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Affiliation(s)
| | - Nguyen Hai Nam
- Department of General Surgery, University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam
| | | | - Linh Tran
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 700000, Vietnam
| | | | - Mohamed Sadik
- Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | | | | | - Nguyen Tien Huy
- Evidence Based Medicine Research Group, Ton Duc Thang University, Ho Chi Minh City, 700000, Vietnam
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Martins J, S B. Phytochemistry and pharmacology of anti-depressant medicinal plants: A review. Biomed Pharmacother 2018; 104:343-365. [PMID: 29778018 DOI: 10.1016/j.biopha.2018.05.044] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 05/03/2018] [Accepted: 05/08/2018] [Indexed: 11/25/2022] Open
Abstract
Stress renders an individual to experience mental pressure and exhaustion which brings about feelings of anxiety, depression, anger and/or other negative emotions. Depression affects a person's state of mind, behaviour, health and is often associated with suicide. The use of anti-depressant drugs as therapeutic agents is associated with symptoms such as, delayed onset of action, side-effects, drug-drug and dietary interactions, sexual dysfunction, cardiac toxicity, etc. Thus, there is need to target these issues and improve current treatment options. Medicinal plants have long been used in discovering novel treatment strategies and compounds with promising roles in treating various disease conditions. There has been an increase, worldwide, in the use of medicinal plants and herbs for developing nutraceuticals for treatment of depression and other psychiatric disorders. Medicinal plants in their natural forms are valuable as they are rich in various phytochemical compounds. These phytochemical compounds have pharmacological roles in treating various diseases conditions; apart from being widely available in nature and commercially beneficial. The phytochemical compounds in plants are constantly being explored through various experimental studies to determine the molecular basis of how medicinal plants work in relation to drugs and diseases and to develop neutraceuticals for improving conditions. This review summarizes 110 medicinal plants and their phytochemical constituents that have been shown to possess anti-depressant activity. This review also highlights the various mechanisms of anti-depressant action of some of these plants and their plant parts like roots, stem, leaves, flowers, fruit or whole plant; phytochemical compounds showing anti-depressant activity such flavanoids, steroids, saponins, sugars, lectins, alkaloids, etc.; and various anti-depressant screening models used such as tail suspension test, forced swim test, chronic unpredictable stress test, sucrose preference test, monoamine oxidase inhibition assay, learned helplessness test, open field test, hole board test, etc. However, mechanistic evaluation of many of these plants still needs to be investigated and explored.
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Affiliation(s)
- Jeanette Martins
- Sunandan Divatia School of Science, NMIMS (Deemed-to-be) University, 3rd Floor, Bhaidas Sabhagriha Building, Bhaktivedanta Swami Marg, Vile Parle (W), Mumbai 400 056, India.
| | - Brijesh S
- Sunandan Divatia School of Science, NMIMS (Deemed-to-be) University, 3rd Floor, Bhaidas Sabhagriha Building, Bhaktivedanta Swami Marg, Vile Parle (W), Mumbai 400 056, India.
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Ramos-Hryb AB, Cunha MP, Kaster MP, Rodrigues ALS. Natural Polyphenols and Terpenoids for Depression Treatment: Current Status. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/b978-0-444-64068-0.00006-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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EVALUATION AND COMPARATIVE STUDY OF HYPOGLYCAEMIC ACTIVITY OF MORUS ALBA WITH ORAL HYPOGLYCAEMIC DRUG (GLIBENCLAMIDE) IN ALLOXAN INDUCED DIABETIC RATS. ACTA ACUST UNITED AC 2016. [DOI: 10.14260/jemds/2016/713] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Lim DW, Baek NI, Kim YT, Lee C, Kim IH, Han D. Enhanced anti-immobility effects of Sanggenon G isolated from the root bark of Morus alba combined with the α2-antagonist yohimbine in the rat forced swim test. J Nat Med 2016; 70:679-82. [PMID: 26899239 DOI: 10.1007/s11418-016-0975-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 02/05/2016] [Indexed: 10/22/2022]
Abstract
In this study, we aimed to determine whether Sanggenon G, an active compound isolated from the root bark of Morus alba, exhibited enhanced anti-immobility activity with the addition of the α2-antagonist yohimbine in rats subjected to forced swim test (FST)-induced depression. Fluoxetine (a selective serotonin reuptake inhibitor) treatment in rats reduced the immobility time, and pretreatment with yohimbine significantly enhanced the antidepressant-like behavior of fluoxetine at 5, 10 and 20 mg/kg. Similarly, Sanggenon G significantly decreased the immobility time, reducing immobility by a maximum of 43.9 % when treated at a dose of 20 mg/kg. Furthermore, pretreatment with yohimbine significantly enhanced the antidepressant-like behavior of Sanggenon G at 5 and 10 mg/kg. Our findings suggest that the antidepressant-like effect of Sanggenon G could be facilitated by concomitant use of the α2-antagonist. Further studies are needed to evaluate the potential of Sanggenon G as an alternative therapeutic approach for the treatment of depression.
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Affiliation(s)
- Dong Wook Lim
- Research Group of Innovative Special Food, Korea Food Research Institute, Seongnam, 463-746, Korea
| | - Nam-In Baek
- Graduate School of Biotechnology and Research Institute of Life Sciences and Resources, Kyung Hee University, Yongin, 446-701, Korea
| | - Yun Tai Kim
- Research Group of Innovative Special Food, Korea Food Research Institute, Seongnam, 463-746, Korea.,Department of Food Biotechnology, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 305-333, Republic of Korea
| | - Changho Lee
- Research Group of Innovative Special Food, Korea Food Research Institute, Seongnam, 463-746, Korea
| | - In-Ho Kim
- Research Group of Innovative Special Food, Korea Food Research Institute, Seongnam, 463-746, Korea
| | - Daeseok Han
- Research Group of Innovative Special Food, Korea Food Research Institute, Seongnam, 463-746, Korea.
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9
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Statistical modeling of process parameters for the recovery of polysaccharide from Morus alba leaf. Carbohydr Polym 2013; 98:793-806. [DOI: 10.1016/j.carbpol.2013.06.041] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 06/13/2013] [Accepted: 06/20/2013] [Indexed: 11/18/2022]
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10
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Zhang Q, Yang H, Wang J, Li A, Zhang W, Cui X, Wang K. Effect of green tea on reward learning in healthy individuals: a randomized, double-blind, placebo-controlled pilot study. Nutr J 2013; 12:84. [PMID: 23777561 PMCID: PMC3702504 DOI: 10.1186/1475-2891-12-84] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 05/31/2013] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Both clinical and preclinical studies revealed that regular intake of green tea reduced the prevalence of depressive symptoms, as well as produced antidepressant-like effects in rodents. Evidence proposed that disturbed reward learning has been associated with the development of anhedonia, a core symptom of depression. However, the relationship between green tea and reward learning is poorly investigated. Our goal was to test whether chronic treatment with green tea in healthy subjects affects the process of reward learning and subsequently regulates the depressive symptoms. METHODS Seventy-four healthy subjects participated in a double-blind, randomized placebo-controlled study with oral administration of green tea or placebo for 5weeks. We used the monetary incentive delay task to evaluate the reward learning by measurement of the response to reward trial or no-reward trial. We compared the reaction time of reward responsiveness between green tea and placebo treatment. Furthermore, we selected Montgomery-Asberg depression rating scale (MADRS) and 17-item Hamilton Rating Scale for Depression (HRSD-17) to estimate the depressive symptoms in these two groups. RESULTS The results showed chronic treatment of green tea increased reward learning compared with placebo by decreasing the reaction time in monetary incentive delay task. Moreover, participants treated with green tea showed reduced scores measured in MADRS and HRSD-17 compared with participants treated with placebo. CONCLUSIONS Our findings reveal that chronic green tea increased the reward learning and prevented the depressive symptoms. These results also raised the possibility that supplementary administration of green tea might reverse the development of depression through normalization of the reward function.
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Affiliation(s)
- Qiangye Zhang
- Department of Pediatric Surgery, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, Shandong 250012, China
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Loftis JM, Wilhelm CJ, Huckans M. Effect of epigallocatechin gallate supplementation in schizophrenia and bipolar disorder: an 8-week, randomized, double-blind, placebo-controlled study. Ther Adv Psychopharmacol 2013; 3:21-7. [PMID: 23983989 PMCID: PMC3736959 DOI: 10.1177/2045125312464103] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES Strategies that focus on the reduction of oxidative stress and inflammation may have therapeutic benefit for the treatment of schizophrenia. This clinical trial sought to determine, in a double-blind study, whether epigallocatechin gallate (EGCG), a green tea extract, is a useful adjunct to maintenance antipsychotic medication. METHODS Adults with schizophrenia, schizoaffective disorder or bipolar disorder who were maintained on antipsychotic and other psychotropic medications were randomized to supplemental EGCG or placebo. Study participants completed clinical assessments and blood draws to evaluate supplemental treatment effects on psychiatric symptoms and plasma inflammatory markers. RESULTS A total of 34 participants (17 EGCG, 17 placebo) were randomized and 25 participants (14 EGCG, 11 placebo) completed the study. Both treatment groups showed significant reductions in psychotic, depressive and anxiety symptoms from baseline to end of treatment. However, EGCG did not significantly affect psychiatric symptoms or inflammatory markers, as compared with placebo. Adverse effects were mild and comparable between groups. CONCLUSION There was no signal for a therapeutic effect of the green tea extract EGCG on psychiatric symptoms in this placebo-controlled pilot study.
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Affiliation(s)
- Jennifer M Loftis
- Research and Development Service, Mental Health and Clinical Neurosciences Division, Portland VA Medical Center, R&D 16, 3710 SW US Veterans Hospital Road, Portland, OR 97239, USA
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Lee MS, Park WS, Kim YH, Kwon SH, Jang YJ, Han D, Morita K, Her S. Antidepressant-like effects of Cortex Mori Radicis extract via bidirectional phosphorylation of glucocorticoid receptors in the hippocampus. Behav Brain Res 2013; 236:56-61. [DOI: 10.1016/j.bbr.2012.08.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 08/13/2012] [Accepted: 08/16/2012] [Indexed: 10/28/2022]
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Yang Z, Wang Y, Wang Y, Zhang Y. Bioassay-guided screening and isolation of α-glucosidase and tyrosinase inhibitors from leaves of Morus alba. Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.09.040] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Korte G, Dreiseitel A, Schreier P, Oehme A, Locher S, Geiger S, Heilmann J, Sand PG. Tea catechins' affinity for human cannabinoid receptors. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2010; 17:19-22. [PMID: 19897346 DOI: 10.1016/j.phymed.2009.10.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Revised: 09/16/2009] [Accepted: 10/01/2009] [Indexed: 05/28/2023]
Abstract
Among the many known health benefits of tea catechins count anti-inflammatory and neuroprotective activities, as well as effects on the regulation of food intake. Here we address cannabimimetic bioactivity of catechin derivatives occurring in tea leaves as a possible cellular effector of these functionalities. Competitive radioligand binding assays using recombinant human cannabinoid receptors expressed in Chem-1 and CHO cells identified (-)-epigallocatechin-3-O-gallate, EGCG (K(i)=33.6 microM), (-)-epigallocatechin, EGC (K(i)=35.7 microM), and (-)-epicatechin-3-O-gallate, ECG (K(i)=47.3 microM) as ligands with moderate affinity for type 1 cannabinoid receptors, CB1. Binding to CB2 was weaker with inhibition constants exceeding 50 microM for EGC and ECG. The epimers (+)-catechin and (-)-epicatechin exhibited negligible affinities for both CB1 and CB2. It can be concluded that central nervous cannabinoid receptors may be targeted by selected tea catechins but signaling via peripheral type receptors is less likely to play a major role in vivo.
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Affiliation(s)
- G Korte
- Department of Psychiatry, University of Regensburg, Franz-Josef-Strauss-Allee 11, H4 R97 93053 Regensburg, Germany.
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