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Wisetsai A, Choodej S, Shinta DN, Tontapha S, Amornkitbamrung V, Batsomboon P, Pudhom K. Tocotrienol monomers and dimers from the roots of Litchi chinensis with tyrosinase inhibition activity. PHYTOCHEMISTRY 2024; 217:113921. [PMID: 37952709 DOI: 10.1016/j.phytochem.2023.113921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/04/2023] [Accepted: 11/07/2023] [Indexed: 11/14/2023]
Abstract
Four undescribed modified tocotrienols, including two monomers, litchinols A (1) and B (2), and two walsurol dimers, δ,δ-walsurol (3) and γ,δ-bi-O-walsurol (4), as well as seven known compounds (5-11) were isolated from the roots of Litchi chinensis. The structures of the undescribed compounds were elucidated based on analyses of spectroscopic data and ECD spectra. All tocotrienol derivatives (1-6) were evaluated for their tyrosinase inhibition activity. Only monomers 1-2 and 5-6 displayed potent inhibitory activity and greater than kojic acid. Kinetic analysis revealed that the representative compound 2 was uncompetitive inhibitor with the inhibition constant value of 5.70 μM.
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Affiliation(s)
- Awat Wisetsai
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Siwattra Choodej
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Dina Nur Shinta
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sarawut Tontapha
- Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Vittaya Amornkitbamrung
- Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Paratchata Batsomboon
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road Laksi, Bangkok, 10210, Thailand
| | - Khanitha Pudhom
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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2
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García-Ponce R, Hernández-Escareño JJ, Cruz-Valdez JC, Galindo-Rodríguez SA, Heya MS, Villarreal-Villarreal JP. Ixodicidal effect of extracts from Cordia boissieri, Artemisia ludoviciana and Litchi chinensis on Rhipicephalus (Boophilus) microplus (Acari: Ixodidae). BRAZ J BIOL 2023; 84:e264425. [PMID: 36722676 DOI: 10.1590/1519-6984.264425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 12/14/2022] [Indexed: 02/02/2023] Open
Abstract
The ixodicidal activity of the methanolic extracts of Artemisia ludoviciana (Astereceae), Cordia boissieri (Boraginaceae) and Litchi chinensis (Sapindaceae) against two field populations of Rhipicephalus (Boophilus) microplus from the state of Nuevo Leon (NL) and Veracruz (VER) was evaluated. The extract of L. chinensis in the concentration of 150 mg/ml showed efficacies of 100% and 99% against engorged females and mortalities of 98% and 99% against larvae. C. boissieri in the same concentration showed efficacies of 71% and 37% against engorged adults and mortalities of 33.04% and 10.33% against larvae and A. ludoviciana had efficacies of 94% and 83% in adults and mortalities of 89.39% and 89.21% against larvae in both populations respectively. The enzymatic activity of Acetylcholinesterase (AChE), Carboxylesterase (CaE), Glutathione-S-Transferase (GST) and Alkaline Phosphatase (ALP) was measured in both populations of ticks. As a result, a significant difference between both populations was shown, being the VER population the one that exhibited a higher enzymatic activity (p ≤ 0.05). It can be concluded that the methanolic extract of the seed of L. chinensis shows potential ixodicidal activity and can be used as an alternative source of tick control, however, prior characterization, toxicity and formulation studies are necessary.
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Affiliation(s)
- R García-Ponce
- Universidad Autónoma de Nuevo León - UANL, School of Veterinary Medicine and Zootechnics, Department of Microbiology and Parasitology, Laboratory of Microbiology and Parasitology, Cd. General Escobedo, Nuevo León, México
| | - J J Hernández-Escareño
- Universidad Autónoma de Nuevo León - UANL, School of Veterinary Medicine and Zootechnics, Department of Microbiology and Parasitology, Laboratory of Microbiology and Parasitology, Cd. General Escobedo, Nuevo León, México
| | - J C Cruz-Valdez
- Universidad Autónoma de Nuevo León - UANL, School of Veterinary Medicine and Zootechnics, Department of Microbiology and Parasitology, Laboratory of Microbiology and Parasitology, Cd. General Escobedo, Nuevo León, México
| | - S A Galindo-Rodríguez
- Universidad Autónoma of Nuevo León-UANL, School of Biological Sciences, Department of Chemistry, Laboratory of Analytical Chemistry, San Nicolás de los Garza, Nuevo León, México
| | - M S Heya
- Universidad Autónoma of Nuevo León-UANL, School of Biological Sciences, Department of Chemistry, Laboratory of Analytical Chemistry, San Nicolás de los Garza, Nuevo León, México
| | - J P Villarreal-Villarreal
- Universidad Autónoma de Nuevo León - UANL, School of Veterinary Medicine and Zootechnics, Department of Microbiology and Parasitology, Laboratory of Microbiology and Parasitology, Cd. General Escobedo, Nuevo León, México
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Zhang P, Cui L, Cui Z, Wang Z, Tang P, Luo J, Kong L. Diverse acyclic diterpene derivatives from Aphanamixis sinensis. Fitoterapia 2022; 159:105192. [DOI: 10.1016/j.fitote.2022.105192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/29/2022] [Accepted: 03/29/2022] [Indexed: 11/04/2022]
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Liang C, Kjaerulff L, Hansen PR, Kongstad KT, Staerk D. Dual High-Resolution α-Glucosidase and PTP1B Inhibition Profiling Combined with HPLC-PDA-HRMS-SPE-NMR Analysis for the Identification of Potentially Antidiabetic Chromene Meroterpenoids from Rhododendron capitatum. JOURNAL OF NATURAL PRODUCTS 2021; 84:2454-2467. [PMID: 34460246 DOI: 10.1021/acs.jnatprod.1c00454] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Thirteen previously undescribed chromene meroterpenoids, capitachromenic acids A-M (3-6, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, and 11b), were identified from an ethyl acetate extract of Rhododendron capitatum, using dual high-resolution α-glucosidase and PTP1B inhibition profiling in combination with HPLC-PDA-HRMS-SPE-NMR. In addition, one known chromene meroterpenoid, daurichromenic acid (15), and its biosynthetic precursor, grifolic acid (12), two C-methylated flavanones, (2S)-5,7,4'-trihydroxy-8-methylflavanone (1) and farrerol (2), and two triterpenoids, oleanolic acid (14a) and ursolic acid (14b), were identified. New structures were elucidated by extensive 1D and 2D NMR analysis, and absolute configurations of new chromene meroterpenoids were assigned by analysis of their ECD spectra on the basis of the empirical chromane helicity rule and from Rh2(OCOCF3)4-induced ECD spectra by applying the bulkiness rule. Compounds 5, 9a, 9b, 12, and 15 showed α-glucosidase inhibitory activity with IC50 values ranging from 8.0 to 93.5 μM, while compounds 3, 5, 8b, 9a, 9b, 10b, 11b, 12, and 15 showed PTP1B inhibitory activity with IC50 values ranging from 2.5 to 68.1 μM.
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Affiliation(s)
- Chao Liang
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Louise Kjaerulff
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Paul Robert Hansen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Kenneth T Kongstad
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
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Tan X, Zhong F, Teng H, Li Q, Li Y, Mei Z, Chen Y, Yang G. Acylphloroglucinol and tocotrienol derivatives from the fruits of Garcinia paucinervis. Fitoterapia 2020; 146:104688. [DOI: 10.1016/j.fitote.2020.104688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 07/04/2020] [Accepted: 07/14/2020] [Indexed: 02/07/2023]
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Cao S, Han Y, Li Q, Chen Y, Zhu D, Su Z, Guo H. Mapping Pharmacological Network of Multi-Targeting Litchi Ingredients in Cancer Therapeutics. Front Pharmacol 2020. [DOI: 10.3389/fphar.2020.00451
expr 967555229 + 995954239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
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7
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Cao S, Han Y, Li Q, Chen Y, Zhu D, Su Z, Guo H. Mapping Pharmacological Network of Multi-Targeting Litchi Ingredients in Cancer Therapeutics. Front Pharmacol 2020; 11:451. [PMID: 32390834 PMCID: PMC7193898 DOI: 10.3389/fphar.2020.00451] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 03/23/2020] [Indexed: 12/12/2022] Open
Abstract
Considerable pharmacological studies have demonstrated that the extracts and ingredients from different parts (seeds, peels, pulps, and flowers) of Litchi exhibited anticancer effects by affecting the proliferation, apoptosis, autophagy, metastasis, chemotherapy and radiotherapy sensitivity, stemness, metabolism, angiogenesis, and immunity via multiple targeting. However, there is no systematical analysis on the interaction network of “multiple ingredients-multiple targets-multiple pathways” anticancer effects of Litchi. In this study, we summarized the confirmed anticancer ingredients and molecular targets of Litchi based on published articles and applied network pharmacology approach to explore the complex mechanisms underlying these effects from a perspective of system biology. The top ingredients, top targets, and top pathways of each anticancer function were identified using network pharmacology approach. Further intersecting analyses showed that Epigallocatechin gallate (EGCG), Gallic acid, Kaempferol, Luteolin, and Betulinic acid were the top ingredients which might be the key ingredients exerting anticancer function of Litchi, while BAX, BCL2, CASP3, and AKT1 were the top targets which might be the main targets underling the anticancer mechanisms of these top ingredients. These results provided references for further understanding and exploration of Litchi as therapeutics in cancer as well as the application of “Component Formula” based on Litchi’s effective ingredients.
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Affiliation(s)
- Sisi Cao
- College of Pharmacy, Guangxi Medical University, Nanning, China
| | - Yaoyao Han
- College of Pharmacy, Guangxi Medical University, Nanning, China.,Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education & Center for Translational Medicine, Guangxi Medical University, Nanning, China
| | - Qiaofeng Li
- Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education & Center for Translational Medicine, Guangxi Medical University, Nanning, China.,School of Preclinical Medicine, Guangxi Medical University, Nanning, China
| | - Yanjiang Chen
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia
| | - Dan Zhu
- College of Pharmacy, Guangxi Medical University, Nanning, China
| | - Zhiheng Su
- College of Pharmacy, Guangxi Medical University, Nanning, China
| | - Hongwei Guo
- College of Pharmacy, Guangxi Medical University, Nanning, China.,Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education & Center for Translational Medicine, Guangxi Medical University, Nanning, China
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Mamun F, Rahman MM, Zamila M, Subhan N, Hossain H, Raquibul Hasan S, Alam MA, Haque MA. Polyphenolic compounds of litchi leaf augment kidney and heart functions in 2K1C rats. J Funct Foods 2020. [DOI: 10.1016/j.jff.2019.103662] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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9
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Hu Z, Tao Y, Tao X, Su Q, Cai J, Qin C, Ding W, Li C. Sesquiterpenes with Phytopathogenic Fungi Inhibitory Activities from Fungus Trichoderma virens from Litchi chinensis Sonn. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:10646-10652. [PMID: 31479255 DOI: 10.1021/acs.jafc.9b04053] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A new monosesquiterpene diacetylgliocladic acid (1), a new dimeric sesquiterpene divirensol H (9), and two exceptionally novel trimeric sesquiterpene trivirensols A and B (11 and 12), together with another eight known congeners, were purified from an endophytic fungus Trichoderma virens FY06, derived from Litchi chinensis Sonn. whose fruit is a delicious and popular food. All of them were identified by comprehensive spectroscopic analysis, combined with biosynthetic considerations. Trivirensols A and B are unprecedented trimers of which three subunits are connected by two ester bonds of the sesquiterpene class. Relative to the positive control triadimefon, all the tested metabolites showed strong inhibitory activities against at least one phytopathogenic fungus among Penicillium italicum, Fusarium oxysporum, Fusarium graminearum, Colletotrichum musae, and Colletotrictum gloeosporioides. Notably, as metabolites of the endophytic fungus from L. chinensis, they all presented strong antifungal activities against C. gloeosporioides which causes anthracnose in L. chinensis.
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Affiliation(s)
- Zhibo Hu
- College of Materials and Energy , South China Agricultural University , Guangzhou 510642 , China
| | - Yiwen Tao
- Key Laboratory of Molecular Target & Clinical Pharmacology, School of Pharmaceutical Sciences and the Fifth Affiliated Hospital , Guangzhou Medical University , Guangzhou 511436 , China
| | - Xingyu Tao
- College of Materials and Energy , South China Agricultural University , Guangzhou 510642 , China
| | - Qinhua Su
- College of Materials and Energy , South China Agricultural University , Guangzhou 510642 , China
| | - Jiachun Cai
- College of Materials and Energy , South China Agricultural University , Guangzhou 510642 , China
| | - Can Qin
- College of Materials and Energy , South China Agricultural University , Guangzhou 510642 , China
| | - Weijia Ding
- College of Materials and Energy , South China Agricultural University , Guangzhou 510642 , China
| | - Chunyuan Li
- College of Materials and Energy , South China Agricultural University , Guangzhou 510642 , China
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11
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Kaur C, Sharma S, Navprem S. Phenolics and enzymes of phenol metabolism in ‘Seedless’ and ‘Calcuttia’ cultivars of litchi grown in North India. ACTA ALIMENTARIA 2018. [DOI: 10.1556/066.2018.47.4.8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- C. Kaur
- Department of Biochemistry, Punjab Agricultural University, 141004 Ludhiana. India
| | - S. Sharma
- Department of Biochemistry, Punjab Agricultural University, 141004 Ludhiana. India
| | - S. Navprem
- Department of Fruit Science, Punjab Agricultural University, 141004 Ludhiana. India
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12
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Porter MR, Shaker RM, Calcanas C, Topczewski JJ. Stereoselective Dynamic Cyclization of Allylic Azides: Synthesis of Tetralins, Chromanes, and Tetrahydroquinolines. J Am Chem Soc 2018; 140:1211-1214. [PMID: 29303567 PMCID: PMC5989720 DOI: 10.1021/jacs.7b11299] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This report describes the stereoselective synthesis of 3-azido-tetralins, -chromanes, and -tetrahydroquinolines via a tandem allylic azide rearrangement/Friedel-Crafts alkylation. Exposure of allylic azides with a pendant trichloroacetimidate to catalytic quantities of AgSbF6 proved optimal for this transformation. This cascade successfully differentiates the equilibrating azide isomers, providing products in excellent yield and selectivity (>25 examples, up to 94% yield and >25:1 dr). In many cases, the reactive isomer is only a trace fraction of the equilibrium mixture, keenly illustrating the dynamic nature of these systems. We demonstrate the utility of this process via a synthesis of hasubanan.
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Affiliation(s)
- Matthew R. Porter
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Rami M. Shaker
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Cristian Calcanas
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Joseph J. Topczewski
- Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, United States
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Birringer M, Siems K, Maxones A, Frank J, Lorkowski S. Natural 6-hydroxy-chromanols and -chromenols: structural diversity, biosynthetic pathways and health implications. RSC Adv 2018; 8:4803-4841. [PMID: 35539527 PMCID: PMC9078042 DOI: 10.1039/c7ra11819h] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 01/18/2018] [Indexed: 01/26/2023] Open
Abstract
We present the first comprehensive and systematic review on the structurally diverse toco-chromanols and -chromenols found in photosynthetic organisms, including marine organisms, and as metabolic intermediates in animals. The focus of this work is on the structural diversity of chromanols and chromenols that result from various side chain modifications. We describe more than 230 structures that derive from a 6-hydroxy-chromanol- and 6-hydroxy-chromenol core, respectively, and comprise di-, sesqui-, mono- and hemiterpenes. We assort the compounds into a structure-activity relationship with special emphasis on anti-inflammatory and anti-carcinogenic activities of the congeners. This review covers the literature published from 1970 to 2017.
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Affiliation(s)
- Marc Birringer
- Department of Nutritional, Food and Consumer Sciences, Fulda University of Applied Sciences Leipziger Straße 123 36037 Fulda Germany
| | - Karsten Siems
- AnalytiCon Discovery GmbH Hermannswerder Haus 17 14473 Potsdam Germany
| | - Alexander Maxones
- Department of Nutritional, Food and Consumer Sciences, Fulda University of Applied Sciences Leipziger Straße 123 36037 Fulda Germany
| | - Jan Frank
- Institute of Biological Chemistry and Nutrition, University of Hohenheim Garbenstr. 28 70599 Stuttgart Germany
| | - Stefan Lorkowski
- Institute of Nutrition, Friedrich Schiller University Jena Dornburger Str. 25 07743 Jena Germany
- Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD), Halle-Jena-Leipzig Germany
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Zhao JX, Liu CP, Zhang MM, Li J, Yue JM. Dysohonin A, a meroditerpenoid incorporating a 6,15,6-fused heterotricyclic ring system from Dysoxylum hongkongense. Org Chem Front 2018. [DOI: 10.1039/c8qo00469b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dysohonin A (1), a meroditerpenoid incorporating an unprecedented architecture, along with three new biogenetically related meroditerpenoids as PTP1B inhibitors were reported in this paper.
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Affiliation(s)
- Jin-Xin Zhao
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- People's Republic of China
| | - Cui-Ping Liu
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- People's Republic of China
| | - Meng-Meng Zhang
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- People's Republic of China
| | - Jia Li
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- People's Republic of China
| | - Jian-Min Yue
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai
- People's Republic of China
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Emanuele S, Lauricella M, Calvaruso G, D'Anneo A, Giuliano M. Litchi chinensis as a Functional Food and a Source of Antitumor Compounds: An Overview and a Description of Biochemical Pathways. Nutrients 2017; 9:nu9090992. [PMID: 28885570 PMCID: PMC5622752 DOI: 10.3390/nu9090992] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 09/01/2017] [Accepted: 09/04/2017] [Indexed: 12/11/2022] Open
Abstract
Litchi is a tasty fruit that is commercially grown for food consumption and nutritional benefits in various parts of the world. Due to its biological activities, the fruit is becoming increasingly known and deserves attention not only for its edible part, the pulp, but also for its peel and seed that contain beneficial substances with antioxidant, cancer preventive, antimicrobial, and anti-inflammatory functions. Although literature demonstrates the biological activity of Litchi components in reducing tumor cell viability in in vitro or in vivo models, data about the biochemical mechanisms responsible for these effects are quite fragmentary. This review specifically describes, in a comprehensive analysis, the antitumor properties of the different parts of Litchi and highlights the main biochemical mechanisms involved.
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Affiliation(s)
- Sonia Emanuele
- Department of Experimental Biomedicine and Clinical Neurosciences, Laboratory of Biochemistry, University of Palermo, 90127 Palermo, Italy.
| | - Marianna Lauricella
- Department of Experimental Biomedicine and Clinical Neurosciences, Laboratory of Biochemistry, University of Palermo, 90127 Palermo, Italy.
| | - Giuseppe Calvaruso
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Laboratory of Biochemistry, University of Palermo, 90127 Palermo, Italy.
| | - Antonella D'Anneo
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Laboratory of Biochemistry, University of Palermo, 90127 Palermo, Italy.
| | - Michela Giuliano
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Laboratory of Biochemistry, University of Palermo, 90127 Palermo, Italy.
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Pan J, Wang Y, Chen S, Zhang X, Wang Y, Zhou Z. Stereocontrolled construction of 2-(3-indolyl)chromane scaffolds via organocatalyzed cascade Michael addition-hemiketalization followed by Friedel–Crafts alkylation reaction. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.042] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Ibrahim SRM, Mohamed GA. Litchi chinensis: medicinal uses, phytochemistry, and pharmacology. JOURNAL OF ETHNOPHARMACOLOGY 2015; 174:492-513. [PMID: 26342518 DOI: 10.1016/j.jep.2015.08.054] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/28/2015] [Accepted: 08/30/2015] [Indexed: 05/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Litchi chinensis Sonn. (Sapindaceae) has been widely used in many cultures for the treatment of cough, flatulence, stomach ulcers, diabetes, obesity, testicular swelling, hernia-like conditions, and epigastric and neuralgic pains. The ethnopharmacologial history of L. chinensis indicated that it possesses hypoglycemic, anticancer, antibacterial, anti-hyperlipidemic, anti-platelet, anti-tussive, analgesic, antipyretic, hemostatic, diuretic, and antiviral activities. AIM OF THE REVIEW The aim of this review is to provide up-to-date information on the botanical characterization, distribution, traditional uses, and chemical constituents, as well as the pharmacological activities and toxicity of L. chinensis. Moreover, the focus of this review is the possible exploitation of this plant to treat different diseases and to suggest future investigations. MATERIALS AND METHODS To provide an overview of the ethnopharmacology, chemical constituents, and pharmacological activities of litchi, and to reveal their therapeutic potentials and being an evidence base for further research works, information on litchi was gathered from scientific journals, books, and worldwide accepted scientific databases via a library and electronic search (PubMed, Elsevier, Google Scholar, Springer, Scopus, Web of Science, Wiley online library, and pubs.acs.org/journal/jacsat). All abstracts and full-text articles were examined. The most relevant articles were selected for screening and inclusion in this review. RESULTS A comprehensive analysis of the literature obtained through the above-mentioned sources confirmed that ethno-medical uses of L. chinensis have been recorded in China, India, Vietnam, Indonesia, and Philippines. Phytochemical investigation revealed that the major chemical constituents of litchi are flavonoids, sterols, triterpenens, phenolics, and other bioactive compounds. Crude extracts and pure compounds isolated from L. chinensis exhibited significant antioxidant, anti-cancer, anti-inflammatory, anti-microbial, anti-viral, anti-diabetic, anti-obesity, hepato-protective, and immunomodulatory activities. From the toxicological perspective, litchi fruit juice and extracts have been proven to be safe at a dose 1 g/kg. CONCLUSIONS Phytochemical investigations indicated that phenolics were the major bioactive components of L. chinensis with potential pharmacological activities. The ethnopharmacological relevance of L. chinensis is fully justified by the most recent findings indicating it is a useful medicinal and nutritional agent for treating a wide range of human disorders and aliments. Further investigations are needed to fully understand the mode of action of the active constituents and to fully exploit its preventive and therapeutic potentials.
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Affiliation(s)
- Sabrin R M Ibrahim
- Department of Pharmacognosy and Pharmaceutical Chemistry, College of Pharmacy, Taibah University, Al Madinah Al Munawwarah 30078, Saudi Arabia; Department of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt.
| | - Gamal A Mohamed
- Department of Natural Products and Alternative Medicine, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut 71524, Egypt
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Xia W, Mo H. Potential of tocotrienols in the prevention and therapy of Alzheimer's disease. J Nutr Biochem 2015; 31:1-9. [PMID: 27133418 DOI: 10.1016/j.jnutbio.2015.10.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/19/2015] [Accepted: 10/23/2015] [Indexed: 02/07/2023]
Abstract
Currently there is no cure for Alzheimer's disease (AD); clinical trials are underway to reduce amyloid generation and deposition, a neuropathological hallmark in brains of AD patients. While genetic factors and neuroinflammation contribute significantly to AD pathogenesis, whether increased cholesterol level is a causative factor or a result of AD is equivocal. Prenylation of proteins regulating neuronal functions requires mevalonate-derived farnesyl pyrophosphate (FPP) and geranylgeranyl pyrophosphate (GGPP). The observation that the levels of FPP and GGPP, but not that of cholesterol, are elevated in AD patients is consistent with the finding that statins, competitive inhibitors of 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase, reduce FPP and GGPP levels and amyloid β protein production in preclinical studies. Retrospective studies show inverse correlations between incidence of AD and the intake and serum levels of the HMG CoA reductase-suppressive tocotrienols; tocopherols show mixed results. Tocotrienols, but not tocopherols, block the processing and nuclear localization of sterol regulatory element binding protein-2, the transcriptional factor for HMG CoA reductase and FPP synthase, and enhance the degradation of HMG CoA reductase. Consequently, tocotrienols deplete the pool of FPP and GGPP and potentially blunt prenylation-dependent AD pathogenesis. The antiinflammatory activity of tocotrienols further contributes to their protection against AD. The mevalonate- and inflammation-suppressive activities of tocotrienols may represent those of an estimated 23,000 mevalonate-derived plant secondary metabolites called isoprenoids, many of which are neuroprotective. Tocotrienol-containing plant foods and tocotrienol derivatives and formulations with enhanced bioavailability may offer a novel approach in AD prevention and treatment.
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Affiliation(s)
- Weiming Xia
- Geriatric Research Education and Clinical Center, ENR Memorial Veterans Hospital, Bedford, MA.
| | - Huanbiao Mo
- Department of Nutrition, Byrdine F. Lewis School of Nursing and Health Professions, Georgia State University, Atlanta, GA; Center for Obesity Reversal, Georgia State University, Atlanta, GA.
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